/* ═══════════════════════════════════════════════════════════════════
   TT Academy — Premium Design System v2
   Aurum 3.0 base + Skool-style polish (density, rhythm, depth, motion)
   ═══════════════════════════════════════════════════════════════════ */

:root {
    /* ── Spacing scale (8pt grid) ──────────────────────────────── */
    --tta-s-1: 4px;
    --tta-s-2: 8px;
    --tta-s-3: 12px;
    --tta-s-4: 16px;
    --tta-s-5: 20px;
    --tta-s-6: 24px;
    --tta-s-8: 32px;
    --tta-s-10: 40px;
    --tta-s-12: 48px;
    --tta-s-16: 64px;
    --tta-s-20: 80px;
    --tta-s-24: 96px;

    /* ── Typography scale ──────────────────────────────────────── */
    --tta-text-2xs: 0.6875rem;   /* 11 */
    --tta-text-xs:  0.75rem;      /* 12 */
    --tta-text-sm:  0.875rem;     /* 14 */
    --tta-text-base:1rem;         /* 16 */
    --tta-text-md:  1.125rem;     /* 18 */
    --tta-text-lg:  1.25rem;      /* 20 */
    --tta-text-xl:  1.5rem;       /* 24 */
    --tta-text-2xl: 1.875rem;     /* 30 */
    --tta-text-3xl: 2.5rem;       /* 40 */
    --tta-text-4xl: 3.25rem;      /* 52 */

    /* ── Radii ─────────────────────────────────────────────────── */
    --tta-r-xs: 6px;
    --tta-r-sm: 10px;
    --tta-r-md: 14px;
    --tta-r-lg: 18px;
    --tta-r-xl: 24px;

    /* ── Motion ────────────────────────────────────────────────── */
    --tta-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --tta-ease-in: cubic-bezier(0.7, 0, 0.84, 0);
    --tta-t-fast: 140ms;
    --tta-t-base: 220ms;
    --tta-t-slow: 360ms;

    /* ── Surface depths (layered darkness) ────────────────────── */
    --tta-surf-0: #08080A;        /* page background (deeper than main) */
    --tta-surf-1: #0E0E12;        /* raised card */
    --tta-surf-2: #141418;        /* elevated card (hover) */
    --tta-surf-3: #1B1B21;        /* popover, modal */
    --tta-surf-line: rgba(255, 255, 255, 0.06);
    --tta-surf-line-strong: rgba(255, 255, 255, 0.12);
    --tta-surf-line-gold: rgba(212, 175, 55, 0.22);

    /* ── Shadows (layered for real depth) ─────────────────────── */
    --tta-shadow-xs: 0 1px 2px rgba(0,0,0,.5);
    --tta-shadow-sm: 0 2px 6px rgba(0,0,0,.35), 0 1px 2px rgba(0,0,0,.45);
    --tta-shadow-md:
        0 10px 24px -8px rgba(0,0,0,.55),
        0 4px 10px -2px rgba(0,0,0,.4),
        inset 0 1px 0 rgba(255,255,255,.04);
    --tta-shadow-lg:
        0 24px 60px -16px rgba(0,0,0,.7),
        0 10px 20px -6px rgba(0,0,0,.5),
        inset 0 1px 0 rgba(255,255,255,.05);
    --tta-shadow-gold:
        0 12px 40px -8px rgba(212,175,55,.18),
        0 0 0 1px rgba(212,175,55,.15),
        inset 0 1px 0 rgba(255,255,255,.08);
    --tta-shadow-glow: 0 0 0 3px rgba(212, 175, 55, 0.18);
}

/* ═══════════════════════════════════════════════════════════════════
   Reset + base
   ═══════════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; }

.tta-body {
    background:
        radial-gradient(ellipse 120% 60% at 50% -10%, rgba(212,175,55,0.06) 0%, transparent 50%),
        radial-gradient(ellipse 80% 50% at 10% 100%, rgba(212,175,55,0.025) 0%, transparent 60%),
        var(--tta-surf-0);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    letter-spacing: -0.005em;
}

.tta-body::selection { background: var(--gold); color: #0A0A0A; }
.tta-body ::selection { background: var(--gold); color: #0A0A0A; }

/* Fondo dinámico de bajo peso (solo CSS, sutil): un "mesh" de degradados que
   flota lento sobre el color de fondo actual. Da vida sin recargar — opacidades
   muy bajas (0.02–0.05) para no competir con el contenido. */
.tta-body::before {
    content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background:
        radial-gradient(55% 45% at 15% 8%, rgba(212,175,55,0.05), transparent 60%),
        radial-gradient(45% 55% at 88% 22%, rgba(94,196,255,0.025), transparent 65%),
        radial-gradient(55% 45% at 72% 100%, rgba(212,175,55,0.045), transparent 70%);
    animation: ttaMeshFloat 34s ease-in-out infinite alternate;
}
@keyframes ttaMeshFloat {
    0%   { transform: translate3d(0,0,0) scale(1); }
    100% { transform: translate3d(-16px,-28px,0) scale(1.06); }
}
@media (prefers-reduced-motion: reduce) { .tta-body::before { animation: none; } }
/* El contenido va por encima del mesh. */
.tta-nav, .tta-main, .tta-footer, .tta-bottom-tabs, .tta-mobile-menu { position: relative; z-index: 1; }

/* Botón "Gráficos en vivo" del pie: SOLO visible cuando la Academia corre como
   PWA instalada (display-mode: standalone). En navegador normal queda oculto. */
/* Enlace "Gráficos en vivo" del pie: mismo estilo que Terms/Privacy/etc.
   (hereda .tta-footer__links a). Oculto por defecto; visible SOLO en PWA instalada. */
.tta-footer__pwa { display: none; }
@media (display-mode: standalone), (display-mode: fullscreen), (display-mode: minimal-ui) {
    .tta-footer__pwa { display: inline; }
}

/* ═══════════════════════════════════════════════════════════════════
   Top navigation
   ═══════════════════════════════════════════════════════════════════ */

.tta-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    padding-top: env(safe-area-inset-top); /* respeta el notch/Dynamic Island en PWA instalada */
    background: rgba(8, 8, 10, 0.72);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border-bottom: 1px solid var(--tta-surf-line);
    transition: border-color var(--tta-t-base) var(--tta-ease),
                background var(--tta-t-base) var(--tta-ease);
}
.tta-nav.is-scrolled { border-bottom-color: var(--tta-surf-line-strong); }

.tta-nav__inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: var(--tta-s-4) var(--tta-s-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--tta-s-4);
}

.tta-nav__brand {
    display: inline-flex;
    align-items: center;
    gap: var(--tta-s-3);
    font-weight: 700;
    color: var(--text-white);
    text-decoration: none;
    letter-spacing: -0.01em;
    font-size: var(--tta-text-md);
    transition: opacity var(--tta-t-fast) var(--tta-ease);
}
.tta-nav__brand:hover { opacity: 0.85; }
.tta-nav__brand img { height: 22px; width: auto; }
.tta-nav__brand span {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.tta-nav__actions {
    display: flex;
    align-items: center;
    gap: var(--tta-s-3);
}

.tta-nav__link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--tta-text-sm);
    font-weight: 500;
    padding: var(--tta-s-2) var(--tta-s-3);
    border-radius: var(--tta-r-xs);
    transition: color var(--tta-t-fast) var(--tta-ease),
                background var(--tta-t-fast) var(--tta-ease);
}
.tta-nav__link:hover {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.03);
}

/* ═══════════════════════════════════════════════════════════════════
   Layout
   ═══════════════════════════════════════════════════════════════════ */

.tta-main {
    flex: 1;
    max-width: 100%;
    margin: 0 auto;
    /* Padding lateral fluido (vw) → el contenido usa todo el ancho de la pantalla,
       con margen proporcional. Antes un cap fijo de 1240px dejaba huecos a los lados. */
    padding: var(--tta-s-10) clamp(16px, 3vw, 64px) var(--tta-s-16);
    width: 100%;
}

.tta-footer {
    border-top: 1px solid var(--tta-surf-line);
    padding: var(--tta-s-8) var(--tta-s-6);
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    margin-top: var(--tta-s-12);
}
.tta-footer__inner {
    max-width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: var(--tta-s-4);
    flex-wrap: wrap;
}
.tta-footer__links { display: flex; gap: var(--tta-s-5); }
.tta-footer__links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--tta-t-fast) var(--tta-ease);
}
.tta-footer__links a:hover { color: var(--gold); }

/* ═══════════════════════════════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════════════════════════════ */

.tta-hero {
    position: relative;
    min-height: 300px;
    border-radius: var(--tta-r-xl);
    overflow: hidden;
    margin-bottom: var(--tta-s-10);
    background: linear-gradient(135deg, #0F0F14, #1A1A20);
    border: 1px solid var(--tta-surf-line);
    box-shadow: var(--tta-shadow-lg);
    animation: ttaFadeInUp .6s var(--tta-ease) both;
}
.tta-hero__banner {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.35;
    filter: saturate(1.1);
}
.tta-hero__banner::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(8,8,10,0.55) 55%,
        rgba(8,8,10,0.95) 100%);
}
.tta-hero__content {
    position: relative;
    z-index: 1;
    padding: var(--tta-s-10);
    display: flex;
    gap: var(--tta-s-6);
    align-items: flex-end;
    min-height: 300px;
}
.tta-hero__avatar {
    width: 104px;
    height: 104px;
    border-radius: 50%;
    border: 3px solid var(--gold);
    background: var(--tta-surf-2);
    box-shadow: 0 8px 24px rgba(0,0,0,0.5),
                0 0 0 4px rgba(212, 175, 55, 0.1);
    transition: transform var(--tta-t-slow) var(--tta-ease);
}
.tta-hero__avatar:hover { transform: scale(1.03); }
.tta-hero__meta { flex: 1; }
.tta-hero__meta h1 {
    margin: 0 0 var(--tta-s-2);
    font-size: clamp(1.75rem, 3.5vw, var(--tta-text-2xl));
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
}
.tta-hero__meta p {
    margin: 0;
    color: var(--text-secondary);
    max-width: 62ch;
    line-height: 1.55;
    font-size: var(--tta-text-base);
}

/* ═══════════════════════════════════════════════════════════════════
   Tabs (Skool-style segmented control)
   ═══════════════════════════════════════════════════════════════════ */

.tta-tabs {
    display: flex;
    gap: var(--tta-s-1);
    padding: var(--tta-s-1);
    margin-bottom: var(--tta-s-8);
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-sm);
    overflow-x: auto;
    scrollbar-width: none;
    box-shadow: var(--tta-shadow-xs);
    position: sticky;
    top: var(--tta-nav-h, 56px); /* set by JS from actual nav height */
    z-index: 90;
}
.tta-tabs::-webkit-scrollbar { display: none; }

.tta-tab-btn {
    padding: var(--tta-s-3) var(--tta-s-5);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--tta-text-sm);
    cursor: pointer;
    border-radius: var(--tta-r-xs);
    transition: all var(--tta-t-fast) var(--tta-ease);
    white-space: nowrap;
    letter-spacing: -0.005em;
}
.tta-tab-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.03); }
.tta-tab-btn.is-active {
    color: var(--text-white);
    background: var(--tta-surf-3);
    box-shadow: var(--tta-shadow-xs), inset 0 1px 0 rgba(255,255,255,0.06);
    font-weight: 600;
}

/* ── Tab panels ──────────────────────────────────────────────────── */
.tta-panel {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--tta-s-6) 0;
}

/* ═══════════════════════════════════════════════════════════════════
   Grids
   ═══════════════════════════════════════════════════════════════════ */

.tta-grid {
    display: grid;
    gap: var(--tta-s-6);
}
.tta-grid--courses { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.tta-grid--lives { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

/* ═══════════════════════════════════════════════════════════════════
   Cards — layered depth + hover
   ═══════════════════════════════════════════════════════════════════ */

.tta-card {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    transition: transform var(--tta-t-base) var(--tta-ease),
                border-color var(--tta-t-base) var(--tta-ease),
                box-shadow var(--tta-t-base) var(--tta-ease),
                background var(--tta-t-base) var(--tta-ease);
    box-shadow: var(--tta-shadow-xs);
}
.tta-card::before {
    /* Subtle top edge highlight */
    content: '';
    position: absolute;
    top: 0; left: var(--tta-s-4); right: var(--tta-s-4);
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
    opacity: 0;
    transition: opacity var(--tta-t-base);
}
.tta-card:hover {
    transform: translateY(-3px);
    border-color: var(--tta-surf-line-gold);
    background: var(--tta-surf-2);
    box-shadow: var(--tta-shadow-md);
}
.tta-card:hover::before { opacity: 1; }

.tta-card__cover {
    aspect-ratio: 16/9;
    background-size: cover;
    background-position: center;
    background-color: var(--tta-surf-2);
    position: relative;
    overflow: hidden;
}
.tta-card__cover::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.4));
    opacity: 0;
    transition: opacity var(--tta-t-base);
}
.tta-card:hover .tta-card__cover::after { opacity: 1; }

.tta-card__body {
    padding: var(--tta-s-5);
    display: flex;
    flex-direction: column;
    gap: var(--tta-s-3);
}
.tta-card__title {
    font-weight: 600;
    margin: 0;
    font-size: var(--tta-text-base);
    letter-spacing: -0.01em;
    line-height: 1.35;
    color: var(--text-white);

    /* Line clamp for long titles */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.tta-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    font-weight: 500;
}
.tta-card__price {
    color: var(--gold);
    font-weight: 700;
    font-size: var(--tta-text-md);
    letter-spacing: -0.015em;
}

/* ═══════════════════════════════════════════════════════════════════
   Badges
   ═══════════════════════════════════════════════════════════════════ */

.tta-badge-live {
    display: inline-flex;
    align-items: center;
    gap: var(--tta-s-2);
    background: rgba(239,68,68,0.12);
    color: var(--red);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--tta-text-2xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border: 1px solid rgba(239,68,68,0.25);
}
.tta-badge-live::before {
    content: '';
    width: 6px; height: 6px;
    background: var(--red);
    border-radius: 50%;
    animation: ttaPulse 1.4s infinite;
    box-shadow: 0 0 8px rgba(239,68,68,0.8);
}

.tta-badge-free {
    color: var(--green);
    background: rgba(34,197,94,0.12);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--tta-text-2xs);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border: 1px solid rgba(34,197,94,0.25);
}
.tta-badge-paid {
    color: var(--gold);
    background: var(--gold-bg);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--tta-text-2xs);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border: 1px solid var(--gold-border);
}

/* ═══════════════════════════════════════════════════════════════════
   Player
   ═══════════════════════════════════════════════════════════════════ */

.tta-player {
    position: relative;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--tta-r-lg);
    overflow: hidden;
    box-shadow: var(--tta-shadow-lg);
}
.tta-player iframe,
.tta-player video { width: 100%; height: 100%; border: 0; display: block; }
.tta-player__watermark {
    position: absolute;
    bottom: 8%;
    right: 5%;
    color: rgba(255,255,255,0.25);
    font-family: var(--font-mono);
    font-size: 11px;
    pointer-events: none;
    user-select: none;
    text-shadow: 0 0 4px rgba(0,0,0,0.9);
    transition: all 1.2s var(--tta-ease);
    letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════════════════════════════════
   Post / Feed
   ═══════════════════════════════════════════════════════════════════ */

.tta-post {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-6);
    margin-bottom: var(--tta-s-4);
    transition: border-color var(--tta-t-base) var(--tta-ease);
    animation: ttaFadeInUp .35s var(--tta-ease) both;
}
.tta-post:hover { border-color: var(--tta-surf-line-strong); }
.tta-post__header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--tta-s-3);
    font-size: var(--tta-text-sm);
}
.tta-post__actions {
    display: flex;
    gap: var(--tta-s-5);
    margin-top: var(--tta-s-4);
    color: var(--text-muted);
    font-size: var(--tta-text-sm);
    align-items: center;
}
.tta-post__action {
    display: inline-flex;
    align-items: center;
    gap: var(--tta-s-2);
    cursor: pointer;
    background: transparent;
    border: 0;
    color: inherit;
    padding: var(--tta-s-2) var(--tta-s-3);
    border-radius: var(--tta-r-xs);
    transition: all var(--tta-t-fast) var(--tta-ease);
    font-weight: 500;
}
.tta-post__action:hover { color: var(--gold); background: rgba(255,255,255,0.03); }
.tta-post__action.liked { color: var(--red); }
.tta-post__action.liked:hover { background: rgba(239,68,68,0.08); }

/* ── Post 3-dot menu (Skool-style) ──────────────────────────────── */
.tta-post-menu-trigger {
    opacity: 0; transition: opacity var(--tta-t-fast) ease;
}
.tta-post:hover .tta-post-menu-trigger { opacity: 1; }
.tta-post-menu button {
    display: block; width: 100%; text-align: left;
    padding: 10px 16px; border: none; background: none;
    color: var(--text-secondary); cursor: pointer;
    font-size: var(--tta-text-sm); transition: background var(--tta-t-fast) ease;
}
.tta-post-menu button:hover {
    background: rgba(255,255,255,0.04);
}
.tta-post-menu button:not(:last-child) {
    border-bottom: 1px solid var(--tta-surf-line);
}

/* ═══════════════════════════════════════════════════════════════════
   Reaction bar (6-emoji row)
   ═══════════════════════════════════════════════════════════════════ */
.tta-react-bar {
    display: flex; gap: 2px; flex-wrap: wrap;
}
.tta-react-btn {
    display: inline-flex; align-items: center; gap: 3px;
    padding: 4px 8px; border-radius: 16px;
    background: var(--tta-surf-0); border: 1px solid var(--tta-surf-line);
    cursor: pointer; font-size: 14px; line-height: 1;
    transition: all .15s ease; color: var(--text-secondary);
}
.tta-react-btn:hover { border-color: var(--gold); background: rgba(212,175,55,0.06); }
.tta-react-btn.is-active { border-color: var(--gold); background: rgba(212,175,55,0.1); }
.tta-react-btn span { font-size: 11px; font-weight: 600; }
.tta-react-btn--sm {
    padding: 2px 6px; font-size: 12px; border-radius: 12px;
    background: transparent; border-color: transparent;
    opacity: 0.5; transition: opacity .15s ease, border-color .15s ease, background .15s ease;
}
.tta-react-btn--sm:hover { opacity: 1; border-color: var(--tta-surf-line); background: var(--tta-surf-0); }
.tta-react-btn--sm.is-active { opacity: 1; border-color: var(--gold); background: rgba(212,175,55,0.1); }
.tta-comment-reactions { flex-wrap: wrap; }

/* ═══════════════════════════════════════════════════════════════════
   Chips (category pills, filter pills)
   ═══════════════════════════════════════════════════════════════════ */
.tta-chip {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 6px 14px; border-radius: 20px;
    background: var(--tta-surf-1); border: 1px solid var(--tta-surf-line);
    color: var(--text-secondary); font-size: var(--tta-text-sm);
    font-weight: 500; cursor: pointer;
    transition: all .15s ease; white-space: nowrap;
}
.tta-chip:hover { border-color: var(--gold); color: var(--text-primary); }
.tta-chip.is-active {
    background: var(--gold); color: #0A0A0A;
    border-color: var(--gold); font-weight: 600;
}
.tta-chip--sm {
    padding: 4px 10px; font-size: 12px; border-radius: 14px;
}
.tta-feed-sort-periods { display: flex; align-items: center; }

/* ═══════════════════════════════════════════════════════════════════
   Poll component
   ═══════════════════════════════════════════════════════════════════ */
.tta-poll-option { transition: border-color .15s ease; }
.tta-poll-option:hover { border-color: var(--gold) !important; }
.tta-poll-option.is-voted { border-color: var(--gold) !important; background: rgba(212,175,55,0.04); }

/* ═══════════════════════════════════════════════════════════════════
   Empty state component
   ═══════════════════════════════════════════════════════════════════ */
.tta-empty {
    text-align: center; padding: 48px 24px;
    color: var(--text-muted);
}
.tta-empty__icon { font-size: 2.5rem; margin-bottom: 12px; }
.tta-empty__title {
    font-size: var(--tta-text-md); font-weight: 600;
    color: var(--text-primary); margin-bottom: 6px;
}
.tta-empty__desc {
    font-size: var(--tta-text-sm); max-width: 360px;
    margin-inline: auto; line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════════
   Skeleton loading blocks
   ═══════════════════════════════════════════════════════════════════ */
.tta-skeleton, .tta-skeleton-block {
    background: linear-gradient(90deg, var(--tta-surf-1) 25%, var(--tta-surf-2, #1a1a1f) 50%, var(--tta-surf-1) 75%);
    background-size: 200% 100%;
    animation: ttaShimmer 1.5s infinite;
    border-radius: var(--tta-r-sm);
}
.tta-skeleton-block { height: 120px; }
@keyframes ttaShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* (badge-free/live/paid defined above in Badges section) */

/* ═══════════════════════════════════════════════════════════════════
   Auth modal — must render as fixed overlay above everything
   ═══════════════════════════════════════════════════════════════════ */

#tta-auth-modal {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important; /* dvh: viewport real en Safari/Chrome móvil */
    margin: 0 !important;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10100 !important;
    padding: var(--tta-s-4);
}
#tta-auth-modal.open {
    display: flex !important;
    animation: ttaFadeIn .2s ease;
}

.tta-auth-card {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line-strong);
    border-radius: var(--tta-r-lg);
    padding: var(--tta-s-8);
    min-width: 380px;
    max-width: 440px;
    width: 100%;
    box-shadow: var(--tta-shadow-lg);
    animation: ttaSlideInUp .28s var(--tta-ease);
}
.tta-auth-card h3 {
    margin: 0 0 var(--tta-s-5);
    font-size: var(--tta-text-xl);
    letter-spacing: -0.01em;
}
.tta-auth-providers {
    display: flex;
    flex-direction: column;
    gap: var(--tta-s-2);
    margin-bottom: var(--tta-s-5);
}
.tta-divider {
    display: flex;
    align-items: center;
    gap: var(--tta-s-3);
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    margin: var(--tta-s-5) 0;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.tta-divider::before, .tta-divider::after {
    content: '';
    flex: 1;
    border-top: 1px solid var(--tta-surf-line);
}

/* ── Activation screen (WhatsApp one-tap) ──────────────────────── */
.tta-activate-code {
    font-family: var(--font-mono);
    font-size: var(--tta-text-2xl);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--gold);
    background: var(--tta-surf-0);
    border: 1px solid var(--tta-surf-line-gold);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-4) var(--tta-s-5);
    user-select: all;
    word-break: break-all;
}
.tta-activate-wait {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--tta-s-2);
    color: var(--text-muted);
    font-size: var(--tta-text-sm);
}
.tta-activate-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--tta-surf-line-strong);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}
.tta-activate-fallback {
    margin-top: var(--tta-s-5);
    padding-top: var(--tta-s-4);
    border-top: 1px solid var(--tta-surf-line);
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════════
   Paywall
   ═══════════════════════════════════════════════════════════════════ */

.tta-paywall {
    text-align: center;
    padding: var(--tta-s-12) var(--tta-s-6);
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(212,175,55,0.08) 0%, transparent 70%),
        var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line-gold);
    border-radius: var(--tta-r-lg);
    box-shadow: var(--tta-shadow-md);
}
.tta-paywall h2 {
    color: var(--gold);
    margin: 0 0 var(--tta-s-3);
    font-size: var(--tta-text-xl);
    letter-spacing: -0.01em;
}

/* ═══════════════════════════════════════════════════════════════════
   Forms tweaks
   ═══════════════════════════════════════════════════════════════════ */

.tta-body .form-control {
    padding: var(--tta-s-3) var(--tta-s-4);
    font-size: 16px; /* 16px fijo: evita el zoom automático de iOS al enfocar inputs */
    border-radius: var(--tta-r-sm);
    transition: border-color var(--tta-t-fast) var(--tta-ease),
                box-shadow var(--tta-t-fast) var(--tta-ease),
                background var(--tta-t-fast) var(--tta-ease);
}
.tta-body .form-control:focus {
    box-shadow: var(--tta-shadow-glow);
}

/* Buttons — tta override for extra polish */
.tta-body .btn {
    padding: var(--tta-s-3) var(--tta-s-5);
    font-size: var(--tta-text-sm);
    font-weight: 600;
    letter-spacing: -0.005em;
    border-radius: var(--tta-r-sm);
    transition: transform var(--tta-t-fast) var(--tta-ease),
                box-shadow var(--tta-t-fast) var(--tta-ease),
                background var(--tta-t-fast) var(--tta-ease),
                border-color var(--tta-t-fast) var(--tta-ease);
}
.tta-body .btn:hover { transform: translateY(-1px); }
.tta-body .btn:active { transform: translateY(0); }
.tta-body .btn-lg { padding: var(--tta-s-4) var(--tta-s-8); font-size: var(--tta-text-base); }

/* ═══════════════════════════════════════════════════════════════════
   Skeletons
   ═══════════════════════════════════════════════════════════════════ */

.tta-skeleton {
    background: linear-gradient(90deg,
        var(--tta-surf-1) 0%,
        var(--tta-surf-2) 50%,
        var(--tta-surf-1) 100%);
    background-size: 200% 100%;
    border-radius: var(--tta-r-sm);
    animation: ttaShimmer 1.4s infinite;
}
/* (ttaShimmer keyframes defined above in Skeleton section) */

/* (empty state defined above in Empty state component section) */

/* ═══════════════════════════════════════════════════════════════════
   Animations
   ═══════════════════════════════════════════════════════════════════ */

@keyframes ttaFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes ttaFadeInUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes ttaSlideInUp {
    from { opacity: 0; transform: translateY(16px) scale(.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes ttaPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* Stagger card entrance */
.tta-grid > *:nth-child(1) { animation-delay: 0s; }
.tta-grid > *:nth-child(2) { animation-delay: .04s; }
.tta-grid > *:nth-child(3) { animation-delay: .08s; }
.tta-grid > *:nth-child(4) { animation-delay: .12s; }
.tta-grid > *:nth-child(5) { animation-delay: .16s; }
.tta-grid > *:nth-child(6) { animation-delay: .2s; }
.tta-grid > * { animation: ttaFadeInUp .4s var(--tta-ease) both; }

/* ═══════════════════════════════════════════════════════════════════
   Discover hero (landing)
   ═══════════════════════════════════════════════════════════════════ */

.tta-discover-hero {
    text-align: center;
    padding: var(--tta-s-16) var(--tta-s-4) var(--tta-s-10);
    position: relative;
}
.tta-discover-hero h1 {
    font-size: clamp(2rem, 5vw, var(--tta-text-4xl));
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin: 0 0 var(--tta-s-4);
}
.tta-discover-hero h1 .tta-accent {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}
.tta-discover-hero p {
    color: var(--text-secondary);
    max-width: 62ch;
    margin: 0 auto var(--tta-s-8);
    font-size: var(--tta-text-md);
    line-height: 1.55;
}
.tta-search {
    max-width: 580px;
    margin: 0 auto;
    position: relative;
}
.tta-search input {
    width: 100%;
    padding: var(--tta-s-4) var(--tta-s-5) var(--tta-s-4) var(--tta-s-10);
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--tta-text-base);
    font-family: inherit;
    transition: all var(--tta-t-base) var(--tta-ease);
    outline: none;
    text-align: left;
}
.tta-search input::placeholder { color: var(--text-muted); }
.tta-search input:focus {
    border-color: var(--gold);
    background: var(--tta-surf-2);
    box-shadow: var(--tta-shadow-glow);
}
.tta-search::before {
    content: '';
    position: absolute;
    left: var(--tta-s-4);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238B8B96' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") no-repeat center;
}

/* ═══════════════════════════════════════════════════════════════════
   Section heading
   ═══════════════════════════════════════════════════════════════════ */

.tta-section-title {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin: var(--tta-s-10) 0 var(--tta-s-5);
}
.tta-section-title h2 {
    margin: 0;
    font-size: var(--tta-text-xl);
    font-weight: 700;
    letter-spacing: -0.015em;
}
.tta-section-title__sub {
    color: var(--text-muted);
    font-size: var(--tta-text-sm);
}

/* ═══════════════════════════════════════════════════════════════════
   Glass card (shared component)
   ═══════════════════════════════════════════════════════════════════ */
.glass-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-lg);
    padding: var(--tta-s-6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* ═══════════════════════════════════════════════════════════════════
   Mobile hamburger menu
   ═══════════════════════════════════════════════════════════════════ */
.tta-nav__hamburger {
    display: none; background: none; border: none; cursor: pointer;
    color: var(--text-secondary); padding: var(--tta-s-2); line-height: 1;
}
.tta-nav__hamburger svg { width: 22px; height: 22px; fill: currentColor; }

.tta-mobile-menu {
    display: none; position: fixed; inset: 0; z-index: 200;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.tta-mobile-menu.open { display: flex; justify-content: flex-end; }
.tta-mobile-menu__panel {
    width: 260px; max-width: 80vw; height: 100%;
    background: var(--tta-surf-0); border-left: 1px solid var(--tta-surf-line);
    padding: var(--tta-s-6); display: flex; flex-direction: column; gap: var(--tta-s-3);
    animation: tta-slide-in .2s ease;
}
@keyframes tta-slide-in { from { transform: translateX(100%); } to { transform: translateX(0); } }
.tta-mobile-menu__close {
    align-self: flex-end; background: none; border: none;
    color: var(--text-secondary); cursor: pointer; font-size: 24px; line-height: 1;
}
.tta-mobile-menu__link {
    display: block; padding: var(--tta-s-3) var(--tta-s-4);
    color: var(--text-primary); text-decoration: none;
    font-size: var(--tta-text-md); font-weight: 500;
    border-radius: var(--tta-r-sm); transition: background .15s;
}
.tta-mobile-menu__link:hover { background: rgba(255,255,255,0.04); }

/* ═══════════════════════════════════════════════════════════════════
   Course detail / learn responsive grids
   ═══════════════════════════════════════════════════════════════════ */
.tta-course-layout {
    display: grid; grid-template-columns: 1fr 340px; gap: 32px; align-items: start;
}
/* Página de lección = app de pantalla completa: 3 columnas (temario | video | notas)
   dentro del viewport, SIN scroll de página. Rompe el cap de .tta-main, oculta el
   footer y usa el fondo de la web comercial. Cada columna gestiona su propio scroll. */
.tta-main:has(.tta-learn-layout) { max-width: none; padding: 0; }
.tta-body:has(.tta-learn-layout) .tta-footer { display: none; }
/* height:100% se resuelve contra .tta-main (flex:1 en el body) → llena el alto
   exacto sin asumir la altura del nav (que es ~76px, no 64). */
.tta-main:has(.tta-learn-layout) { min-height: 0; }
.tta-learn-layout {
    display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 0;
    height: 100%; min-height: 0; overflow: hidden;
    background:
        radial-gradient(70% 60% at 15% 5%, rgba(212,175,55,0.10), transparent 60%),
        radial-gradient(60% 70% at 90% 30%, rgba(94,196,255,0.04), transparent 65%),
        radial-gradient(70% 60% at 60% 100%, rgba(212,175,55,0.08), transparent 70%),
        #09090B;
}
.tta-learn-sidebar {
    overflow-y: auto; min-height: 0; border-right: 1px solid var(--tta-surf-line);
    padding: var(--tta-s-4); background: var(--tta-surf-0);
}
.tta-learn-main {
    display: flex; flex-direction: column; gap: var(--tta-s-3); min-height: 0;
    padding: var(--tta-s-5) var(--tta-s-6); min-width: 0; overflow-y: auto;
}
/* Título de la lección (sobre el reproductor). */
.tta-learn-title {
    flex: 0 0 auto; margin: 0;
    font-size: var(--tta-text-lg); font-weight: 700;
    letter-spacing: -0.015em; line-height: 1.25;
    color: var(--text-white);
}
#lesson-player {
    flex: 0 0 auto; min-height: 0;
    display: flex; align-items: center; justify-content: center;
}
/* El video se ajusta al ancho Y al alto disponibles, manteniendo 16:9.
   Reserva ~260px (nav + título + barra de acción + paddings) para que el
   título de arriba y las notas de abajo queden alcanzables al hacer scroll. */
.tta-learn-main .tta-player {
    width: min(100%, calc((100vh - 260px) * 16 / 9));
    aspect-ratio: 16 / 9; margin: 0 auto;
}
/* Máscara superior del reproductor: tapa el título/canal que YouTube muestra
   arriba. pointer-events:none → los clics siguen llegando al video. Sólo cubre
   la franja de arriba (no toca los controles ni el botón de pantalla completa). */
.tta-learn-main .tta-player::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 64px; z-index: 2; pointer-events: none;
    background: linear-gradient(180deg, #000 0%, rgba(0,0,0,0.55) 55%, transparent 100%);
}
.tta-learn-actionbar { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
#lesson-desc { flex: 0 0 auto; }

/* ── Notas de esta clase (debajo del reproductor) ──────────────── */
.tta-learn-notes {
    flex: 0 0 auto;
    display: flex; flex-direction: column; gap: var(--tta-s-3);
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-4);
    margin-top: var(--tta-s-2);
}
.tta-learn-notes__head {
    display: flex; align-items: center; justify-content: space-between; gap: var(--tta-s-3);
}
.tta-learn-notes__add { display: flex; gap: var(--tta-s-2); align-items: center; }
.tta-learn-notes__add .btn { white-space: nowrap; flex: 0 0 auto; }
.tta-learn-notes__list { display: flex; flex-direction: column; gap: var(--tta-s-2); }
.tta-note-row {
    display: flex; align-items: flex-start; gap: var(--tta-s-2);
    padding: var(--tta-s-2) 0;
    border-top: 1px solid var(--tta-surf-line);
}
.tta-note-row:first-child { border-top: none; }
.tta-note-ts { flex: 0 0 auto; font-family: var(--font-mono); }
.tta-note-text {
    flex: 1 1 auto; min-width: 0;
    font-size: var(--tta-text-sm); line-height: 1.5;
    color: var(--text-secondary); word-break: break-word;
}
.tta-note-del {
    flex: 0 0 auto; background: none; border: none; cursor: pointer;
    color: var(--text-muted); font-size: var(--tta-text-md); line-height: 1;
    padding: 0 var(--tta-s-1); transition: color var(--tta-t-fast) var(--tta-ease);
}
.tta-note-del:hover { color: var(--red); }
/* Pantallas medianas/chicas: apilar en una columna y permitir scroll natural. */
@media (max-width: 1024px) {
    .tta-body:has(.tta-learn-layout) .tta-footer { display: block; }
    .tta-learn-layout { grid-template-columns: 1fr; height: auto; min-height: calc(100vh - 64px); overflow: visible; }
    .tta-learn-sidebar { border-right: none; border-bottom: 1px solid var(--tta-surf-line); }
    .tta-learn-main { overflow: visible; padding: var(--tta-s-4); }
    #lesson-player { display: block; }
    .tta-learn-main .tta-player { width: 100%; }
    /* En móvil/tablet, "Marcar como completada" y "Siguiente lección" van lado
       a lado en una sola fila (sin apilar a ancho completo). */
    .tta-guia-footer { flex-wrap: nowrap; }
    .tta-guia-footer #btn-complete,
    .tta-guia-footer #btn-next { flex: 1 1 0; margin-left: 0; justify-content: center; }
}

/* ═══════════════════════════════════════════════════════════════════
   Auth modal overlay
   ═══════════════════════════════════════════════════════════════════ */
.tta-auth-overlay {
    display: none; position: fixed; inset: 0; z-index: 300;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    justify-content: center; align-items: center; padding: var(--tta-s-4);
}
.tta-auth-overlay.open { display: flex; }
.tta-auth-overlay .tta-auth-card {
    max-height: 90vh; overflow-y: auto; position: relative;
    animation: tta-fade-up .25s ease;
}
@keyframes tta-fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════════════
   Responsive visibility utilities
   ═══════════════════════════════════════════════════════════════════ */
.hide-sm { display: inline; }
.hide-lg { display: none; }

@media (max-width: 768px) {
    .tta-hero__content {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--tta-s-6);
        gap: var(--tta-s-4);
    }
    .tta-hero__avatar { width: 72px; height: 72px; }
    .tta-hero__meta h1 { font-size: var(--tta-text-xl); }
    .tta-main { padding: var(--tta-s-5) var(--tta-s-4) var(--tta-s-10); }
    .tta-nav__inner { padding: var(--tta-s-3) var(--tta-s-4); }
    .tta-nav__link { display: none; }
    .tta-nav__hamburger { display: block; }
    .tta-discover-hero { padding: var(--tta-s-10) var(--tta-s-3) var(--tta-s-6); }
    .tta-grid { gap: var(--tta-s-4); }
    .tta-grid--courses { grid-template-columns: 1fr; }
    .tta-grid--lives { grid-template-columns: 1fr; }
    .tta-post { padding: var(--tta-s-4); }
    .tta-auth-card { min-width: auto; padding: var(--tta-s-6); }

    .tta-course-layout { grid-template-columns: 1fr; }
    .tta-course-layout > aside { position: static; }
    .tta-learn-layout { grid-template-columns: 1fr; }
    .tta-learn-sidebar {
        position: static; max-height: none; border-right: none;
        border-bottom: 1px solid var(--tta-surf-line);
    }

    .hide-sm { display: none !important; }
    .hide-lg { display: inline !important; }

    /* Touch-friendly targets (WCAG 44px minimum) */
    .btn { min-height: 44px; padding: 10px 20px; }
    .btn-sm { min-height: 40px; padding: 8px 16px; }
    .form-control, select, textarea, input[type="text"], input[type="email"], input[type="password"], input[type="search"], input[type="number"] {
        min-height: 44px;
        padding: 10px 16px;
        font-size: 16px; /* prevents iOS zoom on focus */
    }
    .tta-chip { min-height: 36px; padding: 8px 14px; }
}

/* ── Rich text composer ──────────────────────────────────────── */
.tta-composer-toolbar {
    display: flex;
    gap: 2px;
    padding: 6px 8px;
    border-bottom: 1px solid var(--tta-surf-line);
    background: var(--tta-surf-1);
    border-radius: var(--tta-r-md) var(--tta-r-md) 0 0;
    flex-wrap: wrap;
}
.tta-composer-toolbar button {
    background: none;
    border: none;
    color: var(--tta-text-muted);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    min-width: 32px;
    min-height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}
.tta-composer-toolbar button:hover {
    background: rgba(255,255,255,0.08);
    color: var(--tta-text-primary);
}
.tta-composer-toolbar button.active {
    background: rgba(212,175,55,0.15);
    color: var(--gold);
}
.tta-composer-editor {
    min-height: 80px;
    max-height: 300px;
    overflow-y: auto;
    padding: 12px 16px;
    outline: none;
    color: var(--tta-text-primary);
    font-size: 15px;
    line-height: 1.6;
    border: 1px solid var(--tta-surf-line);
    border-top: none;
    border-radius: 0 0 var(--tta-r-md) var(--tta-r-md);
    background: var(--tta-surf-1);
}
.tta-composer-editor:empty:before {
    content: attr(data-placeholder);
    color: var(--tta-text-muted);
    pointer-events: none;
}
.tta-composer-editor:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 2px rgba(212,175,55,0.15);
}
.tta-composer-editor a { color: var(--gold); text-decoration: underline; }
.tta-composer-editor code {
    background: rgba(255,255,255,0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}
.tta-composer-editor blockquote {
    border-left: 3px solid var(--gold);
    margin: 8px 0;
    padding: 4px 12px;
    color: var(--tta-text-muted);
}
.tta-composer-editor ul, .tta-composer-editor ol {
    padding-left: 24px;
    margin: 4px 0;
}
.tta-composer-editor hr {
    border: none;
    border-top: 1px solid var(--tta-surf-line);
    margin: 12px 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════════════════
   Mobile bottom tab bar (Skool-style)
   ═══════════════════════════════════════════════════════════════════ */
.tta-bottom-tabs {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--tta-surf-1);
    border-top: 1px solid var(--tta-surf-line);
    z-index: 1000;
    padding: 6px 0 max(6px, env(safe-area-inset-bottom));
    justify-content: space-around;
}
@media (max-width: 768px) {
    .tta-bottom-tabs { display: flex; }
    .tta-main { padding-bottom: 80px; }
}
.tta-bottom-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 11px;
    padding: 4px 12px;
    transition: color 0.15s;
    min-width: 64px;
}
.tta-bottom-tab .material-symbols-outlined { font-size: 22px; }
.tta-bottom-tab:hover, .tta-bottom-tab.active { color: var(--gold); }

/* ═══════════════════════════════════════════════════════════════════
   Small phones (360-480px)
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
    .tta-main { padding: 16px 12px 60px; }
    .tta-hero__content { gap: 12px; }
    .tta-hero__avatar { width: 64px; height: 64px; }
    .tta-hero__info h1 { font-size: 1.25rem; }
    .tta-hero__stats { gap: 12px; }
    .tta-hero__stat span:first-child { font-size: 1.1rem; }
    .tta-tabs { gap: 0; }
    .tta-tabs button { padding: 10px 12px; font-size: 13px; }
    .tta-post { padding: 14px; }
    .tta-composer-editor { min-height: 60px; font-size: 14px; }
    #tta-toasts { left: 8px; right: 8px; top: 8px; }
    .tta-toast { font-size: 13px; padding: 10px 14px; }

    /* Leaderboard rows: tighter on small phones */
    .tta-lb-row { gap: 8px !important; padding: 10px !important; }
    .tta-lb-header { gap: 8px !important; padding: 6px 10px !important; }

    /* Calendar grid cells */
    .tta-cal-day { padding: 6px 2px; font-size: 13px; }

    /* Composer avatar hide on very small */
    #composer-avatar { display: none; }
}

/* ═══════════════════════════════════════════════════════════════════
   Tablets (769px-1024px)
   ═══════════════════════════════════════════════════════════════════ */
@media (min-width: 769px) and (max-width: 1024px) {
    .tta-main { padding: 24px 32px 48px; max-width: 100%; }
    .tta-grid--courses { grid-template-columns: repeat(2, 1fr); }
}

/* ═══════════════════════════════════════════════════════════════════
   Large desktop (1440px+)
   ═══════════════════════════════════════════════════════════════════ */
@media (min-width: 1440px) {
    /* Antes recapaba a 1200px (desperdiciaba la pantalla en monitores grandes).
       Ahora fluido: usa todo el ancho con padding lateral proporcional. */
    .tta-main { max-width: 100%; padding-inline: clamp(32px, 4vw, 96px); }
}

/* ═══════════════════════════════════════════════════════════════════
   Button variants + disabled state
   ═══════════════════════════════════════════════════════════════════ */

.btn-danger {
    background: #ef4444;
    color: #fff;
    border: 1px solid transparent;
}
.btn-danger:hover { background: #dc2626; transform: translateY(-1px); }

.btn-success {
    background: #22c55e;
    color: #fff;
    border: 1px solid transparent;
}
.btn-success:hover { background: #16a34a; transform: translateY(-1px); }

.btn-warning {
    background: #f59e0b;
    color: #000;
    border: 1px solid transparent;
}

.btn:disabled, .btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════════════
   Form labels + input states
   ═══════════════════════════════════════════════════════════════════ */

label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--tta-text-secondary);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--tta-surf-0);
}
.form-control::placeholder {
    color: var(--tta-text-muted);
}

/* Custom checkbox styling */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--tta-surf-line);
    border-radius: 4px;
    background: var(--tta-surf-1);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: border-color 0.15s, background 0.15s;
}
input[type="checkbox"]:checked {
    background: var(--gold);
    border-color: var(--gold);
}
input[type="checkbox"]:checked::after {
    content: '\2713';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #000;
    font-size: 14px;
    font-weight: 700;
}

/* Select dropdown */
select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--tta-surf-1) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%23888' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center;
    padding-right: 36px;
}

/* ═══════════════════════════════════════════════════════════════════
   Skool-feel polish
   ═══════════════════════════════════════════════════════════════════ */

/* Scrollbar styling */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}
button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

/* ═══════════════════════════════════════════════════════════════════
   Calendar month grid
   ═══════════════════════════════════════════════════════════════════ */
.tta-calendar-grid {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-lg);
    padding: 16px;
    margin-bottom: 20px;
}
.tta-calendar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.tta-calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    text-align: center;
}
.tta-calendar-days .tta-cal-weekday {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    padding: 4px;
    text-transform: uppercase;
}
.tta-calendar-days .tta-cal-day {
    padding: 8px 4px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    position: relative;
    color: var(--text-secondary);
    transition: background 0.15s;
}
.tta-cal-day:hover { background: rgba(255,255,255,0.04); }
.tta-cal-day.today { color: var(--gold); font-weight: 700; }
.tta-cal-day.selected { background: var(--gold); color: #000; font-weight: 700; }
.tta-cal-day.other-month { opacity: 0.3; cursor: default; }
.tta-cal-day.has-event::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--gold);
}
.tta-cal-day.selected.has-event::after {
    background: #000;
}

/* ═══════════════════════════════════════════════════════════════════
   Leaderboard enhancements
   ═══════════════════════════════════════════════════════════════════ */
.tta-lb-row.tta-lb-me {
    border: 1px solid rgba(212,175,55,0.4);
    background: rgba(212,175,55,0.06);
}

/* ═══════════════════════════════════════════════════════════════════
   @mention autocomplete dropdown
   ═══════════════════════════════════════════════════════════════════ */
.tta-mention-dropdown {
    position: absolute;
    background: var(--tta-surf-2);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    box-shadow: var(--tta-shadow-lg);
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    min-width: 200px;
}
.tta-mention-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--tta-text-primary);
    transition: background 0.1s;
}
.tta-mention-item:hover, .tta-mention-item.active {
    background: rgba(212,175,55,0.1);
}
.tta-mention-item img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}
.tta-mention {
    color: var(--gold);
    font-weight: 600;
    background: rgba(212,175,55,0.1);
    padding: 1px 4px;
    border-radius: 4px;
}

/* ═══════════════════════════════════════════════════════════════════
   Link preview card
   ═══════════════════════════════════════════════════════════════════ */
.tta-link-preview-card {
    display: flex;
    gap: 12px;
    padding: 12px;
    margin-top: 8px;
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    position: relative;
    overflow: hidden;
}
.tta-link-preview-card img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}
.tta-link-preview-close {
    position: absolute;
    top: 4px;
    right: 8px;
    background: none;
    border: none;
    color: var(--tta-text-muted);
    font-size: 18px;
    cursor: pointer;
}

/* ═══════════════════════════════════════════════════════════════════
   Trending hashtags
   ═══════════════════════════════════════════════════════════════════ */
.tta-trending-tags {
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
}
.tta-tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(212,175,55,0.08);
    color: var(--gold);
    font-size: 13px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s;
}
.tta-tag-chip:hover { border-color: var(--gold); background: rgba(212,175,55,0.15); }
.tta-tag-chip .tta-tag-count { font-size: 11px; color: var(--tta-text-muted); }
.tta-tag-chip.is-active { border-color: var(--gold); background: rgba(212,175,55,0.18); }

/* ═══════════════════════════════════════════════════════════════════
   Comment reply nesting
   ═══════════════════════════════════════════════════════════════════ */
.tta-comment-nested {
    margin-left: 32px;
    border-left: 2px solid var(--tta-surf-line);
    padding-left: 12px;
}

/* ═══════════════════════════════════════════════════════════════════
   Toast notifications (enhanced)
   ═══════════════════════════════════════════════════════════════════ */
#tta-toasts { position: fixed; top: 16px; right: 16px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; max-width: 380px; }
.tta-toast { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: var(--tta-r-md, 10px); color: #fff; font-size: 14px; box-shadow: var(--tta-shadow-lg, 0 8px 24px rgba(0,0,0,0.4)); transform: translateX(120%); transition: transform 0.3s ease; }
.tta-toast--visible { transform: translateX(0); }
.tta-toast__icon { font-size: 20px; flex: none; }
.tta-toast__msg { flex: 1; line-height: 1.4; }
.tta-toast--success { background: #16a34a; }
.tta-toast--error { background: #dc2626; }
.tta-toast--warning { background: #d97706; }
.tta-toast--info { background: #2563eb; }

/* ═══════════════════════════════════════════════════════════════════
   Auth modal form
   ═══════════════════════════════════════════════════════════════════ */
.tta-auth-form { max-width: 400px; margin: 0 auto; padding: 32px 24px; }
.tta-auth-form .form-control { margin-bottom: 12px; }
.tta-auth-form .btn { width: 100%; margin-bottom: 8px; }
.tta-auth-error { color: var(--red, #ef4444); font-size: 13px; margin-bottom: 12px; text-align: center; }
.tta-auth-slot { display: flex; gap: 8px; align-items: center; }

/* Social login buttons */
.tta-social-btn { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; padding: 10px 16px; border-radius: var(--tta-r-md, 10px); border: 1px solid var(--tta-surf-line); background: var(--tta-surf-1); color: var(--tta-text-primary, var(--text-primary)); font-size: 14px; font-weight: 500; cursor: pointer; transition: border-color 0.15s, background 0.15s; }
.tta-social-btn:hover { border-color: var(--gold); background: var(--tta-surf-2); }
.tta-social-btn img, .tta-social-btn svg { width: 20px; height: 20px; }

/* ═══════════════════════════════════════════════════════════════════
   Notification drawer & items
   ═══════════════════════════════════════════════════════════════════ */
.tta-notif-drawer { position: fixed; top: 0; right: -380px; width: 380px; max-width: 100vw; height: 100vh; background: var(--tta-surf-0, #08080a); border-left: 1px solid var(--tta-surf-line); z-index: 1200; transition: right 0.25s ease; overflow-y: auto; display: flex; flex-direction: column; }
.tta-notif-drawer.is-open { right: 0; }
.tta-notif-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--tta-surf-line); }
.tta-notif-close { background: none; border: none; color: var(--text-muted); font-size: 24px; cursor: pointer; padding: 4px; }
.tta-notif-close:hover { color: var(--text-primary); }
.tta-notif-item { display: flex; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06)); transition: background 0.12s; }
.tta-notif-item:hover { background: var(--tta-surf-1); }
.tta-notif-item.unread { background: rgba(212,175,55,0.04); }
.tta-notif-item.unread::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); margin-top: 6px; flex: none; }
.tta-notif-badge { position: absolute; top: -4px; right: -4px; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--red, #ef4444); color: #fff; font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.tta-notif-dot { display: block; width: 8px; height: 8px; border-radius: 50%; background: var(--red, #ef4444); position: absolute; top: 2px; right: 2px; }
.tta-notif-btn { background: none; border: none; color: var(--gold); font-size: 13px; cursor: pointer; padding: 4px 8px; }
.tta-notif-btn:hover { text-decoration: underline; }
.tta-notif-bell { position: relative; }

/* ═══════════════════════════════════════════════════════════════════
   Gamification: streaks, level-up, badges
   ═══════════════════════════════════════════════════════════════════ */
.tta-gamification { display: flex; align-items: center; gap: 8px; }
.tta-streak { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 12px; background: rgba(239,68,68,0.1); color: #ef4444; font-size: 13px; font-weight: 600; }
.tta-lvl-close { position: absolute; top: 12px; right: 12px; background: none; border: none; color: var(--text-muted); font-size: 24px; cursor: pointer; }
.tta-imp-banner { padding: 12px 16px; background: rgba(212,175,55,0.08); border: 1px solid rgba(212,175,55,0.2); border-radius: var(--tta-r-md); text-align: center; }
.tta-imp-end { opacity: 0.5; pointer-events: none; }

/* Level badge (circular) */
.tta-level-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 28px; height: 22px; padding: 0 7px; border-radius: 11px; font-size: 11px; font-weight: 700; letter-spacing: 0.02em; }

/* ═══════════════════════════════════════════════════════════════════
   Post actions & menus
   ═══════════════════════════════════════════════════════════════════ */
.tta-post-actions { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.tta-post-menu { position: absolute; right: 0; top: 100%; min-width: 160px; background: var(--tta-surf-1); border: 1px solid var(--tta-surf-line); border-radius: var(--tta-r-md); box-shadow: var(--tta-shadow-lg); z-index: 100; overflow: hidden; }
.tta-post-menu button { display: block; width: 100%; text-align: left; padding: 10px 14px; background: none; border: none; color: var(--text-primary); font-size: 14px; cursor: pointer; }
.tta-post-menu button:hover { background: var(--tta-surf-2); }

/* ═══════════════════════════════════════════════════════════════════
   Member cards grid
   ═══════════════════════════════════════════════════════════════════ */
.tta-members-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.tta-member-card { text-align: center; padding: 20px 16px; transition: border-color 0.15s; }
.tta-member-card:hover { border-color: var(--gold); }

/* ═══════════════════════════════════════════════════════════════════
   Leaderboard table
   ═══════════════════════════════════════════════════════════════════ */
.tta-lb-row { display: flex; align-items: center; gap: 12px; padding: 14px; margin-bottom: 6px; transition: border-color 0.15s; }
.tta-lb-row:hover { border-color: rgba(212,175,55,0.2); }
.tta-lb-me { border: 1px solid rgba(212,175,55,0.4); background: rgba(212,175,55,0.06); }

/* ═══════════════════════════════════════════════════════════════════
   Course progress bar
   ═══════════════════════════════════════════════════════════════════ */
.tta-progress-bar { height: 6px; border-radius: 3px; background: var(--tta-surf-2); overflow: hidden; }
.tta-progress-bar__fill { height: 100%; border-radius: 3px; background: var(--gold); transition: width 0.4s ease; }

/* ═══════════════════════════════════════════════════════════════════
   Theme toggle
   ═══════════════════════════════════════════════════════════════════ */
.tta-theme-toggle { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 6px; border-radius: 50%; transition: color 0.15s, background 0.15s; }
.tta-theme-toggle:hover { color: var(--gold); background: var(--tta-surf-1); }
.tta-theme-icon { font-size: 20px; }

/* ═══════════════════════════════════════════════════════════════════
   Tour overlay & tooltips
   ═══════════════════════════════════════════════════════════════════ */
.tta-tour-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 2000; }
.tta-tour-tooltip { position: absolute; max-width: 320px; padding: 20px; background: var(--tta-surf-1); border: 1px solid var(--gold); border-radius: var(--tta-r-md); box-shadow: var(--tta-shadow-lg); z-index: 2001; color: var(--text-primary); font-size: 14px; line-height: 1.5; }
.tta-tour-tooltip::after { content: ''; position: absolute; bottom: -8px; left: 24px; width: 16px; height: 16px; background: var(--tta-surf-1); border-right: 1px solid var(--gold); border-bottom: 1px solid var(--gold); transform: rotate(45deg); }
.tta-tour-next, .tta-tour-prev, .tta-tour-skip { padding: 6px 14px; border-radius: var(--tta-r-sm); font-size: 13px; cursor: pointer; border: none; }
.tta-tour-next { background: var(--gold); color: #0A0A0A; font-weight: 600; }
.tta-tour-prev { background: var(--tta-surf-2); color: var(--text-primary); }
.tta-tour-skip { background: none; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════════════
   Welcome video
   ═══════════════════════════════════════════════════════════════════ */
.tta-wv-close, .tta-wv-ok { background: none; border: none; cursor: pointer; padding: 8px; }
.tta-wv-close { position: absolute; top: 8px; right: 8px; color: var(--text-muted); font-size: 24px; }
.tta-wv-ok { background: var(--gold); color: #0A0A0A; padding: 10px 24px; border-radius: var(--tta-r-md); font-weight: 600; }

/* ═══════════════════════════════════════════════════════════════════
   FX hint & buy button
   ═══════════════════════════════════════════════════════════════════ */
.tta-fx-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.tta-buy { display: inline-flex; align-items: center; gap: 6px; }

/* ═══════════════════════════════════════════════════════════════════
   QR picker (payment)
   ═══════════════════════════════════════════════════════════════════ */
.tta-qr-picker { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 20px; }
.tta-qr-body { text-align: center; }
.tta-qr-body img { max-width: 200px; border-radius: var(--tta-r-md); }

/* ═══════════════════════════════════════════════════════════════════
   Language switcher & widgets
   ═══════════════════════════════════════════════════════════════════ */
.tta-lang-switcher { display: inline-flex; gap: 4px; }
.tta-lang-switcher button { padding: 4px 10px; border: 1px solid var(--tta-surf-line); border-radius: var(--tta-r-sm); background: var(--tta-surf-1); color: var(--text-secondary); font-size: 12px; cursor: pointer; }
.tta-lang-switcher button.is-active { border-color: var(--gold); color: var(--gold); }
.tta-widgets { display: flex; flex-direction: column; gap: 12px; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ═══════════════════════════════════════════════════════════════════
   Mobile toast positioning
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
    #tta-toasts { top: auto; bottom: 72px; right: 8px; left: 8px; max-width: none; }
    .tta-notif-drawer { width: 100vw; right: -100vw; }
    .tta-tour-tooltip { max-width: calc(100vw - 32px); left: 16px !important; right: 16px !important; }
}

/* ═══════════════════════════════════════════════════════════════════
   Additional component styles
   ═══════════════════════════════════════════════════════════════════ */

/* Accent text (gradient highlight) */
.tta-accent {
    background: linear-gradient(135deg, var(--gold, #D4AF37) 0%, #f5d778 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Skeleton loading grid */
.tta-skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

/* Leaderboard header row */
.tta-lb-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    margin-bottom: 4px;
    color: var(--text-muted);
    font-size: var(--tta-text-xs, 0.75rem);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Post body content */
.tta-post__body {
    margin-top: 12px;
    line-height: 1.7;
    word-break: break-word;
    overflow-wrap: anywhere;
}
.tta-post__body img { max-width: 100%; border-radius: var(--tta-r-sm, 10px); margin: 8px 0; }
.tta-post__body a { color: var(--gold, #D4AF37); text-decoration: underline; }

/* Post menu wrapper */
.tta-post-menu-wrap {
    position: relative;
    display: inline-block;
}

/* Link preview card text */
.tta-link-preview-text {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}
.tta-link-preview-text h4 {
    margin: 0 0 4px;
    font-size: var(--tta-text-sm, 0.875rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tta-link-preview-text p {
    margin: 0;
    font-size: var(--tta-text-xs, 0.75rem);
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Poll component */
.tta-poll {
    margin-top: 12px;
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-sm, 10px);
    padding: 14px;
    background: var(--tta-surf-1, #0E0E12);
}
.tta-poll-option {
    position: relative;
    padding: 10px 14px;
    margin-bottom: 4px;
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-sm, 10px);
    cursor: pointer;
    overflow: hidden;
    transition: border-color var(--tta-t-fast) var(--tta-ease);
}
.tta-poll-option:hover { border-color: var(--gold, #D4AF37); }
.tta-poll-option.is-voted { border-color: var(--gold, #D4AF37); background: rgba(212, 175, 55, 0.06); }

/* Comment action buttons (edit/delete) */
.tta-comment-action {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 12px;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background var(--tta-t-fast) var(--tta-ease);
}
.tta-comment-action:hover { background: var(--tta-surf-2, #141418); }

/* Calendar weekday header */
.tta-cal-weekday {
    text-align: center;
    font-size: var(--tta-text-xs, 0.75rem);
    font-weight: 600;
    color: var(--text-muted);
    padding: 8px 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Countdown timer */
.tta-countdown {
    color: var(--gold, #D4AF37);
    font-weight: 600;
    font-size: var(--tta-text-xs, 0.75rem);
    white-space: nowrap;
}

/* Event attendees badge */
.tta-event-attendees {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: var(--tta-text-xs, 0.75rem);
    color: var(--text-muted);
}

/* Trending tag count */
.tta-tag-count {
    font-size: var(--tta-text-2xs, 0.6875rem);
    color: var(--text-muted);
    margin-left: 2px;
}

/* Tag chip (trending hashtags) */
.tta-tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--tta-surf-1, #0E0E12);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-xl, 24px);
    color: var(--text-primary);
    font-size: var(--tta-text-sm, 0.875rem);
    cursor: pointer;
    transition: border-color var(--tta-t-fast) var(--tta-ease), background var(--tta-t-fast) var(--tta-ease);
}
.tta-tag-chip:hover { border-color: var(--gold, #D4AF37); background: rgba(212, 175, 55, 0.06); }

/* ═══════════════════════════════════════════════════════════════
   PHASE 0 — Foundation Components (Skool Parity Redesign)
   ═══════════════════════════════════════════════════════════════ */

/* ── Skeleton Pulse Animation ── */
@keyframes tta-skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
.tta-skeleton-pulse {
    background: linear-gradient(90deg,
        var(--tta-surf-1, #0E0E12) 25%,
        var(--tta-surf-2, #141418) 50%,
        var(--tta-surf-1, #0E0E12) 75%);
    background-size: 200% 100%;
    animation: tta-skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--tta-r-sm, 6px);
}

/* ── Toast slide-in ── */
@keyframes tta-slide-in {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── Pagination Component ── */
.tta-pagination {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--tta-text-sm, 0.875rem);
}
.tta-pagination__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--tta-r-sm, 6px);
    border: 1px solid var(--tta-surf-line, #1F1F25);
    background: transparent;
    color: var(--text-primary, #fff);
    cursor: pointer;
    transition: border-color var(--tta-t-fast) var(--tta-ease);
}
.tta-pagination__btn:hover:not(:disabled) { border-color: var(--gold, #D4AF37); }
.tta-pagination__btn:disabled { opacity: 0.3; cursor: not-allowed; }
.tta-pagination__info { color: var(--text-muted); font-size: var(--tta-text-xs, 0.75rem); }

/* ── Data Table ── */
.tta-data-table-wrapper { width: 100%; }
.tta-data-table__toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    flex-wrap: wrap;
}
.tta-data-table__search {
    display: flex;
    align-items: center;
    background: var(--tta-surf-1, #0E0E12);
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-md, 10px);
    padding: 6px 12px;
    flex: 1;
    max-width: 300px;
}
.tta-data-table__search input { flex: 1; color: var(--text-primary); font-size: var(--tta-text-sm); }
.tta-data-table__bulk-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: var(--tta-r-md, 10px);
}
.tta-data-table__bulk-count { font-size: var(--tta-text-sm); color: var(--gold, #D4AF37); font-weight: 600; }
.tta-data-table__scroll { overflow-x: auto; }
.tta-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--tta-text-sm, 0.875rem);
}
.tta-data-table th {
    text-align: left;
    padding: 10px 12px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: var(--tta-text-xs, 0.75rem);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--tta-surf-line, #1F1F25);
    white-space: nowrap;
    user-select: none;
}
.tta-data-table th.tta-sortable { cursor: pointer; }
.tta-data-table th.tta-sortable:hover { color: var(--gold, #D4AF37); }
.tta-sort-icon {
    font-size: 14px !important;
    vertical-align: middle;
    margin-left: 2px;
    opacity: 0.4;
    transition: opacity var(--tta-t-fast);
}
.tta-data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--tta-surf-line, #1F1F25);
    color: var(--text-primary);
    vertical-align: middle;
}
.tta-data-table tr:hover td { background: rgba(255,255,255,0.02); }
.tta-data-table__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}
.tta-data-table__info { font-size: var(--tta-text-xs); color: var(--text-muted); }
.tta-data-table__per-page select {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    color: var(--text-primary);
    border-radius: var(--tta-r-sm);
}

/* ── Drag Handle ── */
.tta-drag-handle {
    cursor: grab;
    color: var(--text-muted);
    font-size: 18px !important;
    opacity: 0.5;
    transition: opacity var(--tta-t-fast), color var(--tta-t-fast);
}
.tta-drag-handle:hover { opacity: 1; color: var(--gold, #D4AF37); }
.tta-drag-handle:active { cursor: grabbing; }
[draggable="true"] { transition: opacity var(--tta-t-fast); }
[draggable="true"].dragging { opacity: 0.4; }

/* ── Bulk Checkbox ── */
.tta-bulk-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--gold, #D4AF37);
    cursor: pointer;
}

/* ── Upload Progress ── */
.tta-upload-progress {
    width: 100%;
    height: 4px;
    background: var(--tta-surf-1, #0E0E12);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 8px;
}
.tta-upload-progress__bar {
    height: 100%;
    background: var(--gold, #D4AF37);
    border-radius: 2px;
    transition: width 0.2s ease;
    width: 0%;
}

/* ── Full-page Editor Layout ── */
.tta-fullpage-editor {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 20px;
    align-items: start;
}
@media (max-width: 900px) {
    .tta-fullpage-editor { grid-template-columns: 1fr; }
}

/* ── Quiz Builder ── */
.tta-quiz-builder { display: flex; flex-direction: column; gap: 12px; }
.tta-quiz-question {
    background: var(--tta-surf-1, #0E0E12);
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-md, 10px);
    padding: 16px;
    position: relative;
}
.tta-quiz-question__header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.tta-quiz-question__num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gold, #D4AF37);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--tta-text-xs);
    font-weight: 700;
}
.tta-quiz-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-sm, 6px);
    margin-bottom: 6px;
    transition: border-color var(--tta-t-fast);
}
.tta-quiz-option:hover { border-color: var(--gold, #D4AF37); }
.tta-quiz-option.is-correct { border-color: var(--green, #16a34a); background: rgba(22,163,74,0.05); }
.tta-quiz-option input[type="radio"],
.tta-quiz-option input[type="checkbox"] { accent-color: var(--gold, #D4AF37); }

/* ── Rich Editor Toolbar ── */
.tta-rich-editor {
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-md, 10px);
    overflow: hidden;
}
.tta-rich-editor__toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 6px 10px;
    background: var(--tta-surf-1, #0E0E12);
    border-bottom: 1px solid var(--tta-surf-line, #1F1F25);
    flex-wrap: wrap;
}
.tta-rich-editor__btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--tta-r-sm, 6px);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background var(--tta-t-fast), color var(--tta-t-fast);
}
.tta-rich-editor__btn:hover { background: var(--tta-surf-2); color: var(--text-primary); }
.tta-rich-editor__btn.is-active { background: rgba(212,175,55,0.1); color: var(--gold, #D4AF37); }
.tta-rich-editor__content {
    min-height: 120px;
    padding: 14px 16px;
    color: var(--text-primary);
    font-size: var(--tta-text-base, 1rem);
    line-height: 1.6;
    outline: none;
}
.tta-rich-editor__content:empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted);
    pointer-events: none;
}

/* ── KPI Card (Admin) ── */
.tta-kpi {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px !important;
}
.tta-kpi__header {
    display: flex;
    align-items: center;
    gap: 8px;
}
.tta-kpi__label { font-size: var(--tta-text-xs, 0.75rem); color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.tta-kpi__value { font-size: 1.75rem; font-weight: 700; color: var(--text-primary); }
.tta-kpi__trend { font-size: var(--tta-text-xs); }

/* ── Trend Indicator ── */
.tta-trend { display: inline-flex; align-items: center; gap: 2px; font-size: var(--tta-text-xs); font-weight: 600; }
.tta-trend .material-symbols-outlined { font-size: 14px !important; }
.tta-trend--up { color: var(--green, #16a34a); }
.tta-trend--down { color: var(--red, #dc2626); }
.tta-trend--flat { color: var(--text-muted); }

/* ── Avatar Component ── */
.tta-avatar {
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--tta-surf-2, #141418);
    color: var(--gold, #D4AF37);
    font-weight: 700;
    flex-shrink: 0;
}
.tta-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ── Empty State ── */
.tta-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    gap: 12px;
}
.tta-empty-state__icon { font-size: 48px !important; color: var(--text-muted); opacity: 0.4; }
.tta-empty-state__title { font-size: var(--tta-text-base); color: var(--text-secondary); font-weight: 500; }
.tta-empty-state__desc { font-size: var(--tta-text-sm); color: var(--text-muted); max-width: 320px; }

/* ── Level Badge ── */
.tta-level-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--tta-r-xl, 24px);
    font-size: var(--tta-text-2xs, 0.6875rem);
    font-weight: 700;
    background: rgba(212, 175, 55, 0.1);
    color: var(--gold, #D4AF37);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

/* ── Stat Card ── */
.tta-stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px;
    background: var(--tta-surf-1, #0E0E12);
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-md, 10px);
}
.tta-stat-card__icon { font-size: 24px !important; opacity: 0.6; }
.tta-stat-card__value { font-size: var(--tta-text-xl, 1.25rem); font-weight: 700; }
.tta-stat-card__label { font-size: var(--tta-text-xs, 0.75rem); color: var(--text-muted); }

/* ── Progress Bar on Cards ── */
.tta-card__progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255,255,255,0.1);
}
.tta-card__progress-fill {
    height: 100%;
    background: var(--gold, #D4AF37);
    border-radius: 0 2px 2px 0;
    transition: width 0.3s ease;
}

/* ── Modal (improved) ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9990;
    padding: 20px;
}
.modal-content {
    background: var(--tta-surf-0, #08080A);
    border: 1px solid var(--tta-surf-line, #1F1F25);
    border-radius: var(--tta-r-lg, 16px);
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.modal-sm { max-width: 400px; }
.modal-md { max-width: 560px; }
.modal-lg { max-width: 780px; }
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--tta-surf-line);
}
.modal-header h3 { margin: 0; font-size: var(--tta-text-lg, 1.125rem); }
.modal-body { padding: 24px; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--tta-surf-line);
}

/* ── Responsive: tables scroll on mobile ── */
@media (max-width: 768px) {
    .tta-data-table__toolbar { flex-direction: column; align-items: stretch; }
    .tta-data-table__search { max-width: 100%; }
    .tta-data-table__footer { flex-direction: column; gap: 8px; align-items: center; }
}

/* ── Responsive: course detail layout ── */
@media (max-width: 768px) {
    .tta-course-layout { grid-template-columns: 1fr !important; }
    .tta-course-layout aside { position: static !important; }
}

/* ── Responsive: admin subnav horizontal scroll on mobile ── */
@media (max-width: 768px) {
    .tta-subnav__groups { overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; }
    .tta-subnav__groups::-webkit-scrollbar { display: none; }
    .tta-subnav__group { white-space: nowrap; flex-shrink: 0; }
    .tta-subnav__tabs { overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; }
    .tta-subnav__tabs::-webkit-scrollbar { display: none; }
    .tta-subnav__tab { white-space: nowrap; flex-shrink: 0; }
}

/* ── Responsive: curriculum details on mobile ── */
@media (max-width: 480px) {
    .tta-curriculum-lessons li { font-size: 0.85rem; gap: 6px; }
    .tta-curriculum-module summary { padding: 12px; }
}


/* ═══════════════════════════════════════════════════════════════════
   Notification Dropdown
   ═══════════════════════════════════════════════════════════════════ */

.tta-notif-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 340px;
    max-height: 420px;
    background: var(--tta-surf-1, #141428);
    border: 1px solid var(--tta-surf-line, rgba(255,255,255,0.08));
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    z-index: 1000;
    overflow: hidden;
}
.tta-notif-dropdown__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06));
}
.tta-notif-dropdown__list {
    max-height: 360px;
    overflow-y: auto;
    scrollbar-width: thin;
}
.tta-notif-item {
    display: flex;
    gap: 10px;
    padding: 10px 16px;
    transition: background 0.15s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}
.tta-notif-item:hover { background: var(--tta-surf-2, #1a1a2e); }
.tta-notif-item.is-unread { background: rgba(212,175,55,0.04); }
.tta-notif-item__icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--tta-surf-2, #1a1a2e);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tta-notif-item__icon .material-symbols-outlined { font-size: 16px; color: var(--gold, #D4AF37); }
.tta-notif-item__body { flex: 1; min-width: 0; }
.tta-notif-item__text { font-size: 13px; line-height: 1.4; color: var(--tta-text-secondary, var(--text-secondary)); }
.tta-notif-item__time { font-size: 11px; color: var(--tta-text-muted, var(--text-muted)); margin-top: 2px; }

@media (max-width: 480px) {
    .tta-notif-dropdown { width: calc(100vw - 32px); right: -60px; }
}


/* ═══════════════════════════════════════════════════════════════════
   DM / Messages UI
   ═══════════════════════════════════════════════════════════════════ */

.tta-dm-layout {
    display: flex;
    height: calc(100vh - var(--tta-nav-h, 56px) - 1px);
    height: calc(100dvh - var(--tta-nav-h, 56px) - 1px); /* dvh: viewport real móvil */
    max-width: 1200px;
    margin: 0 auto;
    background: var(--tta-surf-0, #08080A);
}

/* ── Thread list panel ── */
.tta-dm-threads {
    width: 340px;
    min-width: 280px;
    flex-shrink: 0;
    border-right: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.tta-dm-threads__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 16px 8px;
}
.tta-dm-thread-list {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
}

/* ── Thread item ── */
.tta-dm-thread-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
}
.tta-dm-thread-item:hover { background: var(--tta-surf-1, #141428); }
.tta-dm-thread-item.is-active { background: var(--tta-surf-2, #1a1a2e); }
.tta-dm-thread-item.has-unread .tta-dm-thread-item__name { font-weight: 700; color: var(--tta-text-primary, var(--text-primary)); }
.tta-dm-thread-item.has-unread .tta-dm-thread-item__preview { color: var(--tta-text-secondary, var(--text-secondary)); }

.tta-dm-thread-item__avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--gold), var(--gold-light, #e8c547));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: #0A0A0A;
}
.tta-dm-thread-item__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.tta-dm-thread-item__body {
    flex: 1;
    min-width: 0;
}
.tta-dm-thread-item__top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
}
.tta-dm-thread-item__name {
    font-size: 14px;
    font-weight: 500;
    color: var(--tta-text-primary, var(--text-primary));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tta-dm-thread-item__time {
    font-size: 11px;
    color: var(--tta-text-muted, var(--text-muted));
    flex-shrink: 0;
}
.tta-dm-thread-item__preview {
    font-size: 13px;
    color: var(--tta-text-muted, var(--text-muted));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}
.tta-dm-thread-item__badge {
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: 10px;
    background: var(--gold, #D4AF37);
    color: #0A0A0A;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ── Chat panel ── */
.tta-dm-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.tta-dm-chat__empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
}
.tta-dm-chat__active {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.tta-dm-chat__header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06));
    flex-shrink: 0;
}
.tta-dm-chat__avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}
.tta-dm-back-btn {
    display: none;
    background: none;
    border: none;
    color: var(--tta-text-muted, var(--text-muted));
    cursor: pointer;
    padding: 4px;
}

/* ── Messages area ── */
.tta-dm-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    scrollbar-width: thin;
}

/* ── Message bubble ── */
.tta-dm-msg {
    max-width: 70%;
    align-self: flex-start;
}
.tta-dm-msg.is-mine {
    align-self: flex-end;
}
.tta-dm-msg__sender {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--gold, #D4AF37);
    margin-bottom: 2px;
}
.tta-dm-msg__text {
    padding: 10px 14px;
    border-radius: 16px 16px 16px 4px;
    background: var(--tta-surf-1, #141428);
    color: var(--tta-text-primary, var(--text-primary));
    font-size: 14px;
    line-height: 1.5;
    word-break: break-word;
}
.tta-dm-msg__text a {
    color: var(--gold, #D4AF37);
    text-decoration: underline;
}
.tta-dm-msg.is-mine .tta-dm-msg__text {
    background: var(--gold, #D4AF37);
    color: #0A0A0A;
    border-radius: 16px 16px 4px 16px;
}
.tta-dm-msg.is-mine .tta-dm-msg__text a {
    color: #0A0A0A;
}
.tta-dm-msg__time {
    display: block;
    font-size: 10px;
    color: var(--tta-text-muted, var(--text-muted));
    margin-top: 2px;
    padding: 0 4px;
}
.tta-dm-msg.is-mine .tta-dm-msg__time { text-align: right; }
.tta-dm-msg__img {
    max-width: 240px;
    border-radius: 12px;
    margin-top: 4px;
    cursor: pointer;
}
.tta-dm-msg__file {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--tta-surf-2, #1a1a2e);
    border-radius: 8px;
    color: var(--gold, #D4AF37);
    text-decoration: none;
    font-size: 13px;
    margin-top: 4px;
}

/* ── Input bar ── */
.tta-dm-input {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom)); /* no chocar con el home indicator */
    border-top: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06));
    flex-shrink: 0;
}
.tta-dm-input textarea {
    flex: 1;
    resize: none;
    min-height: 40px;
    max-height: 120px;
    font-size: 16px; /* 16px: evita el zoom automático de iOS al enfocar */
    padding: 10px 14px;
    background: var(--tta-surf-1, #141428);
    border: 1px solid var(--tta-surf-line, rgba(255,255,255,0.06));
    border-radius: 20px;
    color: var(--tta-text-primary, var(--text-primary));
    line-height: 1.4;
}
.tta-dm-input textarea:focus {
    outline: none;
    border-color: var(--gold, #D4AF37);
}
.tta-dm-input .btn {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tta-dm-input .btn:disabled { opacity: 0.4; }

/* ── Mobile responsive ── */
@media (max-width: 768px) {
    .tta-dm-layout {
        height: calc(100vh - var(--tta-nav-h, 56px));
        height: calc(100dvh - var(--tta-nav-h, 56px));
    }
    .tta-dm-threads {
        width: 100%;
        min-width: 0;
        border-right: none;
    }
    .tta-dm-chat {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--tta-surf-0, #08080A);
        z-index: 10;
        display: none;
    }
    .tta-dm-layout.chat-open .tta-dm-threads { display: none; }
    .tta-dm-layout.chat-open .tta-dm-chat { display: flex; }
    .tta-dm-back-btn { display: flex; }
    .tta-dm-layout { position: relative; }
    .tta-dm-msg { max-width: 85%; }
}

/* ═══════════════════════════════════════════════════════════════════
   Guía del Flujo D — widget validador (UID / depósito), pie de lección,
   mapa de fases y página de felicitaciones.
   Estética sobria: tarjetas planas, borde fino, dorado con mesura.
   ═══════════════════════════════════════════════════════════════════ */

/* ── Widget validador (paso de la guía) ──────────────────────────── */
.tta-guia-step {
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-5);
    box-shadow: var(--tta-shadow-xs);
}
.tta-guia-step[data-state="done"] {
    border-color: rgba(34,197,94,0.32);
}
.tta-guia-step__head {
    display: flex;
    align-items: flex-start;
    gap: var(--tta-s-3);
    margin-bottom: var(--tta-s-4);
}
.tta-guia-step__num {
    flex: none;
    width: 26px; height: 26px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--gold-bg, rgba(212,175,55,0.1));
    border: 1px solid var(--tta-surf-line-gold);
    color: var(--gold);
    font-size: var(--tta-text-xs);
    font-weight: 700;
}
.tta-guia-step[data-state="done"] .tta-guia-step__num {
    background: rgba(34,197,94,0.12);
    border-color: rgba(34,197,94,0.32);
    color: var(--green);
}
.tta-guia-step__title {
    font-weight: 600;
    font-size: var(--tta-text-sm);
    color: var(--text-white);
    letter-spacing: -0.005em;
}
.tta-guia-step__sub {
    margin-top: 2px;
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    line-height: 1.5;
}
.tta-guia-cta {
    width: 100%;
    justify-content: center;
    margin-bottom: var(--tta-s-4);
}
.tta-guia-label {
    display: block;
    margin-bottom: var(--tta-s-2);
    color: var(--text-secondary);
    font-size: var(--tta-text-xs);
    font-weight: 500;
}
.tta-guia-row {
    display: flex;
    gap: var(--tta-s-2);
    flex-wrap: wrap;
}
.tta-guia-row .form-control { flex: 1; min-width: 160px; }
.tta-guia-note {
    background: var(--tta-surf-0);
    border: 1px dashed var(--tta-surf-line-strong);
    border-radius: var(--tta-r-sm);
    padding: var(--tta-s-3) var(--tta-s-4);
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    margin-bottom: var(--tta-s-4);
    line-height: 1.5;
}
.tta-guia-msg {
    margin-top: var(--tta-s-3);
    font-size: var(--tta-text-xs);
    color: var(--text-muted);
    line-height: 1.5;
    min-height: 1em;
}
.tta-guia-ok { color: var(--green); font-weight: 500; }
.tta-guia-err { color: var(--red); }
.tta-guia-pending { color: var(--text-secondary); }
.tta-guia-msg--ok    { color: var(--green); }
.tta-guia-msg--err   { color: var(--red); }
.tta-guia-msg--warn  { color: var(--text-secondary); }

/* Spinner inline del widget */
.tta-guia-spin {
    display: inline-block;
    width: 12px; height: 12px;
    border: 2px solid var(--tta-surf-line-strong);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: -2px;
    margin-right: 4px;
}

/* Medidor de progreso de depósito (balance vs meta) */
.tta-guia-meter { margin-bottom: var(--tta-s-4); }
.tta-guia-meter__bar {
    height: 6px;
    background: var(--tta-surf-0);
    border: 1px solid var(--tta-surf-line);
    border-radius: 999px;
    overflow: hidden;
}
.tta-guia-meter__fill {
    height: 100%;
    width: 0%;
    background: var(--gold);
    border-radius: 999px;
    transition: width var(--tta-t-base) var(--tta-ease);
}
.tta-guia-meter__nums {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: var(--tta-text-xs);
    color: var(--text-secondary);
    font-family: var(--font-mono);
}
.tta-guia-meter__goal { color: var(--text-muted); }

/* ── Pie de la lección (completar + siguiente) ───────────────────── */
.tta-guia-footer {
    display: flex;
    gap: var(--tta-s-3);
    flex-wrap: wrap;
    align-items: center;
}
.tta-guia-footer .btn { display: inline-flex; align-items: center; gap: 6px; }
.tta-guia-footer #btn-next,
.tta-guia-footer #btn-finish-guide { margin-left: auto; }
.tta-guia-foot-hint {
    margin-top: var(--tta-s-3);
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    line-height: 1.5;
}

/* ── Mapa de fases (Guía → Curso básico → Avanzados) ─────────────── */
.tta-guia-phases-head {
    font-size: var(--tta-text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
    margin-bottom: var(--tta-s-4);
}
.tta-guia-phases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--tta-s-4);
}
.tta-guia-phase {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-5);
    box-shadow: var(--tta-shadow-xs);
    transition: border-color var(--tta-t-base) var(--tta-ease),
                background var(--tta-t-base) var(--tta-ease);
}
.tta-guia-phase--active { border-color: var(--tta-surf-line-gold); }
.tta-guia-phase--available:hover {
    border-color: var(--tta-surf-line-gold);
    background: var(--tta-surf-2);
}
.tta-guia-phase--locked { opacity: 0.62; }
.tta-guia-phase__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--tta-s-3);
}
.tta-guia-phase__step {
    font-size: var(--tta-text-2xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.tta-guia-phase__title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--tta-text-base);
    font-weight: 600;
    color: var(--text-white);
    letter-spacing: -0.01em;
    margin-bottom: var(--tta-s-2);
}
.tta-guia-phase__icon { font-size: 18px; color: var(--text-muted); }
.tta-guia-phase--active .tta-guia-phase__icon,
.tta-guia-phase--available .tta-guia-phase__icon { color: var(--gold); }
.tta-guia-phase--done .tta-guia-phase__icon { color: var(--green); }
.tta-guia-phase__desc {
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    line-height: 1.55;
    margin-bottom: var(--tta-s-4);
}
.tta-guia-phase__foot {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.tta-guia-phase__status {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    font-size: var(--tta-text-2xs);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: var(--radius-full, 999px);
    border: 1px solid var(--tta-surf-line);
    color: var(--text-muted);
}
.tta-guia-phase__status--active {
    color: var(--gold);
    border-color: var(--tta-surf-line-gold);
    background: var(--gold-bg, rgba(212,175,55,0.08));
}
.tta-guia-phase__status--done {
    color: var(--green);
    border-color: rgba(34,197,94,0.3);
    background: rgba(34,197,94,0.1);
}
.tta-guia-phase__status--available {
    color: var(--gold);
    border-color: var(--tta-surf-line-gold);
}
.tta-guia-phase__hint {
    color: var(--text-muted);
    font-size: var(--tta-text-2xs);
    line-height: 1.45;
}

@media (max-width: 768px) {
    .tta-guia-phases { grid-template-columns: 1fr; }
    /* "Marcar como completada" + "Siguiente lección" comparten la fila (mitad
       y mitad). "Finalizar el módulo" (sin siguiente) ocupa todo el ancho. */
    .tta-guia-footer { flex-wrap: nowrap; }
    .tta-guia-footer #btn-complete,
    .tta-guia-footer #btn-next { flex: 1 1 0; margin-left: 0; width: auto; justify-content: center; }
    .tta-guia-footer #btn-finish-guide { margin-left: 0; width: 100%; justify-content: center; }
}

/* ═══════════════════════════════════════════════════════════════════
   Página de felicitaciones (completaste la Guía)
   ═══════════════════════════════════════════════════════════════════ */
.tta-done {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--tta-s-12) 0 var(--tta-s-16);
    text-align: center;
    animation: ttaFadeInUp .5s var(--tta-ease) both;
}
.tta-done__badge {
    width: 72px; height: 72px;
    margin: 0 auto var(--tta-s-6);
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--gold-bg, rgba(212,175,55,0.1));
    border: 1px solid var(--tta-surf-line-gold);
}
.tta-done__badge .material-symbols-outlined {
    font-size: 38px;
    color: var(--gold);
}
.tta-done__eyebrow {
    font-size: var(--tta-text-2xs);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: var(--tta-s-2);
}
.tta-done__title {
    margin: 0 0 var(--tta-s-4);
    font-size: clamp(1.6rem, 4vw, var(--tta-text-2xl));
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--text-white);
}
.tta-done__lead {
    margin: 0 auto var(--tta-s-8);
    max-width: 52ch;
    color: var(--text-secondary);
    font-size: var(--tta-text-base);
    line-height: 1.65;
}
.tta-done__next {
    text-align: left;
    background: var(--tta-surf-1);
    border: 1px solid var(--tta-surf-line);
    border-radius: var(--tta-r-md);
    padding: var(--tta-s-6);
    box-shadow: var(--tta-shadow-xs);
    margin-bottom: var(--tta-s-8);
}
.tta-done__next-head {
    display: flex;
    align-items: flex-start;
    gap: var(--tta-s-3);
    margin-bottom: var(--tta-s-3);
}
.tta-done__next-icon {
    font-size: 22px;
    color: var(--gold);
    flex: none;
    margin-top: 2px;
}
.tta-done__next-tag {
    display: flex;
    align-items: center;
    gap: var(--tta-s-2);
    margin-bottom: 4px;
}
.tta-done__next-label {
    font-size: var(--tta-text-2xs);
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.tta-done__next-title {
    font-size: var(--tta-text-md);
    font-weight: 600;
    color: var(--text-white);
    letter-spacing: -0.01em;
}
.tta-done__next-desc {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--tta-text-sm);
    line-height: 1.6;
}
.tta-done__actions {
    display: flex;
    gap: var(--tta-s-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--tta-s-6);
}
.tta-done__actions .btn { display: inline-flex; align-items: center; gap: 6px; }
.tta-done__foot {
    margin: 0;
    color: var(--text-muted);
    font-size: var(--tta-text-xs);
    line-height: 1.6;
    max-width: 46ch;
    margin-inline: auto;
}
@media (max-width: 768px) {
    .tta-done { padding: var(--tta-s-8) 0 var(--tta-s-12); }
    .tta-done__actions .btn { width: 100%; justify-content: center; }
}

/* ═══════════════════════════════════════════════════════════════════
   Accesibilidad (a11y)
   ═══════════════════════════════════════════════════════════════════ */

/* Foco visible por teclado en controles interactivos. La búsqueda fija
   outline:none en su estado base; aquí lo restituimos solo para el foco
   por teclado, sin afectar el aspecto al hacer clic con el ratón. */
.tta-search input:focus-visible,
input:focus-visible,
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--gold, #D4AF37);
    outline-offset: 2px;
}

/* Enlace para saltar al contenido: oculto fuera de pantalla por defecto,
   visible al recibir foco con el teclado. */
.tta-skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    z-index: 10200;
    padding: var(--tta-s-2) var(--tta-s-4);
    background: var(--tta-surf-1);
    color: var(--text-white);
    border: 1px solid var(--tta-surf-line-strong);
    border-radius: var(--tta-r-sm);
    text-decoration: none;
    font-weight: 600;
}
.tta-skip-link:focus {
    left: 8px;
    top: 8px;
}

/* Objetivos táctiles: los chips pequeños deben tener al menos 44px de alto
   en móvil para tocarse cómodamente. */
@media (max-width: 640px) {
    .tta-chip--sm { min-height: 44px; }
}