/* ══ tta-demo-shell.css — la CÁSCARA de la demo v15 (barra lateral, superior, inferior, carril, hojas, botones, avatares) extraída de tta-demo.css para las páginas que la demo no diseñó. Generado el 11-sep-2026: no editar a mano, regenerar desde tta-demo.css. ══ */
:root{--bg:#0A0A0B;--s1:#121214;--s2:#1A1A1D;--s3:#242428;--ln:rgba(255,255,255,.08);--ln2:rgba(255,255,255,.16);
--tx:#F2F2F3;--t2:#A9ABB3;--t3:#9698A2;--ac:#D4AF37;--up:#22C55E;--dn:#F43F5E;--live:#F43F5E;--r:16px;--ease:cubic-bezier(.2,.7,.2,1)}
:root{--bg:#0B0B0E;--s1:#141418;--s2:#1B1B21;--s3:#25252C;--ln:rgba(255,255,255,.09);--ln2:rgba(255,255,255,.18);--ac:#D9B44A;--ac2:#F0D26B;
 --azul:#60A5FA;--verde:#34D399;--rojo:#FB7185;--mor:#A78BFA;--cel:#22D3EE;--sh:0 1px 0 rgba(255,255,255,.05) inset,0 10px 30px -18px rgba(0,0,0,.9)}
:root{--s0:#08080A;--s1:#141417;--s2:#1C1C20;--s3:#242429;--s4:#2D2D33;--s5:#37373E;
 --ln:rgba(255,255,255,.06);--ln2:rgba(255,255,255,.10);--ln3:rgba(255,255,255,.13);--ln4:rgba(255,255,255,.16);
 --hl1:inset 1px 1px 0 0 rgba(255,255,255,.04);--hl2:inset 1px 1px 0 0 rgba(255,255,255,.06);--hl3:inset 1px 1px 0 0 rgba(255,255,255,.08);--hl4:inset 1px 1px 0 0 rgba(255,255,255,.11);
 --sh1:var(--hl1),0 1px 2px rgba(3,3,6,.4);
 --sh2:var(--hl2),0 1px 2px rgba(3,3,6,.45),0 4px 8px -2px rgba(3,3,6,.4);
 --sh3:var(--hl3),0 2px 4px rgba(3,3,6,.5),0 12px 24px -6px rgba(3,3,6,.55);
 --sh4:var(--hl4),0 4px 8px rgba(3,3,6,.55),0 24px 48px -12px rgba(3,3,6,.65);
 --sh:var(--sh1);--hund:inset 0 1px 2px rgba(3,3,6,.6),inset 0 0 0 1px rgba(255,255,255,.03);
 --oro-b:rgba(217,180,74,.55);--oro-an:0 0 0 3px rgba(217,180,74,.28)}
:root{--tx:#EBEBEC}
.app,.app *,.sheet,.sheet *,.scrim,.toast,.toast *,.mini,.mini *{box-sizing:border-box}
.nav button,.mtop button,.mbar button,.sheet button,.rail button,.toast button,.mini button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.nav a,.mtop a,.mbar a,.sheet a,.rail a,.mini a{color:inherit;text-decoration:none}
svg.i{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto}
svg.i.s{width:18px;height:18px}
body{background:var(--bg);color:var(--tx);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.t2{color:var(--t2)}
.t3{color:var(--t3)}
.sm{font-size:13px}
.b{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 18px;border-radius:999px;font-weight:600;font-size:14px;transition:transform .12s var(--ease),background .15s,border-color .15s;white-space:nowrap}
.b:active{transform:scale(.97)}
.b.p{background:var(--tx);color:var(--bg)}
.b.p:hover{background:#fff}
.b.g{border:1px solid var(--ln2);color:var(--tx)}
.b.g:hover{background:var(--s1)}
.b.sm{height:34px;padding:0 14px;font-size:13px}
.b.on{background:var(--s2);color:var(--t2);border-color:transparent}
.av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#2E2F36,#1B1C21);display:grid;place-items:center;font-size:13px;font-weight:600;color:var(--t2);flex:0 0 auto;position:relative}
.av.k{box-shadow:0 0 0 1.5px var(--ac)}
.av.s{width:32px;height:32px;font-size:11px}
.av .on{position:absolute;right:0;bottom:0;width:10px;height:10px;border-radius:50%;background:var(--up);border:2px solid var(--bg)}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--live);vertical-align:1px;margin-right:6px;animation:lt 1.6s infinite}
@keyframes lt{50%{opacity:.35}}
@keyframes ap{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(.7)}60%{transform:scale(1.2)}100%{transform:scale(1)}}
/* ── esqueleto ── */
.app{display:grid;grid-template-columns:260px minmax(0,1fr) 340px;gap:24px;max-width:none;margin:0 auto;padding:0 24px}
body.aula .app{grid-template-columns:260px minmax(0,1fr)}
body.aula .rail{display:none}
.nav{position:sticky;top:0;height:100vh;padding:16px 0;background:var(--bg);z-index:5;display:flex;flex-direction:column;gap:2px;overflow-y:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav>*{flex:0 0 auto}
.logo{display:flex;align-items:center;gap:10px;padding:8px 12px 20px;font-weight:700;font-size:16px}
.logo i{width:30px;height:30px;border-radius:9px;background:var(--ac);color:#111;display:grid;place-items:center;font-style:normal;font-weight:800;font-size:13px}
.nv{display:flex;align-items:center;gap:16px;height:46px;padding:0 14px;border-radius:12px;font-size:16px;color:var(--t2);transition:background .15s,color .15s}
.nv:hover{background:var(--s1);color:var(--tx)}
.nv.on{color:var(--tx);font-weight:700}
.nv.on svg{stroke-width:2.2}
.nv .n{margin-left:auto;font-size:13px;color:var(--t3)}
.nv .n.l{color:var(--live)}
.logo .camp{margin-left:auto;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;color:var(--t2);position:relative;transition:background .15s,color .15s}
.logo .camp:hover{background:var(--s2);color:var(--tx)}
.logo .camp .pt{position:absolute;top:7px;right:7px;width:8px;height:8px;border-radius:50%;background:var(--ac);border:2px solid var(--bg)}
.nv .n.a{color:var(--ac2);font-size:12px;font-weight:600}
.mas{display:none;flex-direction:column;gap:2px;padding-left:4px}
.mas.on{display:flex;animation:ap .2s var(--ease)}
.mas .nv{height:40px;font-size:15px}
.nav .pub{margin:14px 12px 0;height:46px}
.nav .me{margin-top:auto;display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:12px}
.nav .me:hover{background:var(--s1)}
.nav .me b{display:block;font-size:14px}
.nav .me span{font-size:13px;color:var(--t3)}
.main{border-left:1px solid var(--ln);border-right:1px solid var(--ln);min-height:100vh}
body.aula .main{border-right:0}
.rail{position:sticky;top:0;height:100vh;overflow-y:auto;scrollbar-width:none;padding:16px 0 40px;display:flex;flex-direction:column;gap:16px}
.rail::-webkit-scrollbar{display:none}
.rail>*{flex:0 0 auto}
.search{display:flex;align-items:center;gap:10px;height:44px;padding:0 16px;border-radius:999px;background:var(--s1);border:1px solid var(--ln)}
.search input{flex:1;background:none;border:0;outline:0;font-size:15px}
.search input::placeholder{color:var(--t3)}
.rail .card{padding:16px}
.rail .card h3{font-size:16px;font-weight:700;margin-bottom:12px;display:flex;align-items:center}
.rail .card h3 a{margin-left:auto;font-size:13px;font-weight:500;color:var(--t2);cursor:pointer}
.hoy{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.hoy div{padding:10px;border-radius:12px;background:var(--s2);text-align:center}
.hoy b{display:block;font-size:20px;font-weight:700;letter-spacing:-.02em}
.hoy span{font-size:12px;color:var(--t3)}
/* ── cabecera móvil y barra inferior ── */
.mtop,.mbar{display:none}
.st .av{width:100%;height:100%;border:3px solid var(--bg);font-size:14px}
.comp .tools .b{margin-left:auto}
.resf .acts .b{margin-left:auto}
@keyframes bh{0%{transform:translate(-50%,-50%) scale(.4);opacity:0}30%{transform:translate(-50%,-50%) scale(1.1);opacity:1}100%{transform:translate(-50%,-70%) scale(1);opacity:0}}
.post .hd{display:flex;gap:12px;align-items:center}
.post .who b .k{color:var(--ac);font-size:13px}
.post .who b .k{display:inline;margin-left:4px}
.post .tx .h{color:#7DD3FC}
.thread .c{display:flex;gap:10px;margin-bottom:10px;font-size:14px}
.thread .c p{color:var(--t2);line-height:1.45}
.thread .c b{font-size:13px}
.m .foot .b{margin-left:auto}
.m .car .sl .n{position:absolute;left:12px;top:12px;font-size:12px;font-weight:700;padding:3px 8px;border-radius:6px;background:rgba(0,0,0,.6)}
.next .b{margin-left:auto}
.day .n{font-size:11px;color:var(--t3);text-transform:uppercase;letter-spacing:.06em}
.podio .card .av{margin:0 auto 8px;width:52px;height:52px;font-size:15px}
.podio .p1 .av{width:64px;height:64px;box-shadow:0 0 0 2px var(--ac)}
.abar .search{flex:1;min-width:200px;height:42px}
.cc .cov .ic{position:absolute;inset:0;display:grid;place-items:center;font-size:46px;opacity:.85}
.vid .vbt .sp{flex:1}
.file .b{margin-left:auto}
.lst .h{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--ln)}
.lst .h b{flex:1;font-size:14px}
.le .i{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;color:var(--t3);border:1px solid var(--ln2);flex:0 0 auto;margin-top:1px}
.le.ok .i{background:var(--tx);color:var(--bg);border-color:var(--tx)}
.le.on .i{background:var(--ac);color:#111;border-color:var(--ac)}
.lst .ft .b{margin-left:auto}
.ctx{display:none}
body.aula .ctx{display:block}
body.aula .red{display:none}
.ctx .card{margin:8px 8px 0;padding:14px}
.ctx .card b{display:block;font-size:14px}
.ctx .card span{font-size:13px;color:var(--t3)}
.ctx .cap{padding:16px 14px 6px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--t3)}
.des .b{margin-left:auto}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:150;background:var(--s1);border-top:1px solid var(--ln2);border-radius:20px 20px 0 0;padding:12px 16px calc(20px + env(safe-area-inset-bottom));transform:translateY(105%);transition:transform .3s var(--ease);max-height:80dvh;overflow-y:auto}
.sheet.on{transform:none}
.sheet .grab{width:36px;height:4px;border-radius:2px;background:var(--ln2);margin:0 auto 14px}
.scrim{position:fixed;inset:0;z-index:149;background:rgba(0,0,0,.5);display:none}
.scrim.on{display:block}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(16px);background:var(--s2);border:1px solid var(--ln2);padding:11px 16px;border-radius:12px;font-size:14px;opacity:0;transition:opacity .25s var(--ease),transform .25s var(--ease);z-index:200;pointer-events:none;max-width:90vw}
.toast.on{opacity:1;transform:translateX(-50%)}
.tk .x{position:absolute;left:16px;top:16px;z-index:5;color:#fff}
.dv .x{position:absolute;right:16px;top:16px;z-index:5;color:#fff}
.dv .chat .h{padding:12px 14px;border-bottom:1px solid var(--ln);font-size:13px;font-weight:600}
.nrow .hd{display:flex;align-items:baseline;gap:10px;margin-bottom:10px}
.nrow .hd b{font-size:16px}
.nrow .hd span{font-size:13px;color:var(--t3)}
.nrow .hd .ed{display:none;margin-left:auto}
body.edit .nrow .hd .ed{display:inline-flex}
/* contexto del Aula (menú) rediseñado */
.ctx .ring{display:flex;gap:14px;align-items:center;padding:14px;margin:8px 8px 0;border-radius:var(--r);background:var(--s1);border:1px solid var(--ln)}
.ctx .ring .r{position:relative;width:64px;height:64px;display:grid;place-items:center;flex:0 0 auto}
.ctx .ring svg{position:absolute;inset:0;transform:rotate(-90deg)}
.ctx .ring circle.v{stroke-dasharray:176;stroke-dashoffset:calc(176 - 176*var(--p)/100)}
.ctx .ring b{font-size:15px}
.ctx .ring .r b{font-size:14px}
.ctx .ring span{font-size:12px;color:var(--t3);display:block}
.ctx .tiles{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 8px 0}
.ctx .tile{padding:12px;border-radius:12px;background:var(--s1);border:1px solid var(--ln);cursor:pointer}
.ctx .tile:hover{border-color:var(--ln2)}
.ctx .tile b{display:block;font-size:18px;font-weight:700;letter-spacing:-.02em}
.ctx .tile span{font-size:12px;color:var(--t3)}
.ctx .nx{margin:8px 8px 0;padding:12px;border-radius:12px;background:var(--s1);border:1px solid var(--ln);cursor:pointer;display:flex;gap:10px;align-items:center}
.ctx .nx .th{width:64px;height:42px;border-radius:8px;background:linear-gradient(135deg,#2A2418,#0d0e12);position:relative;flex:0 0 auto}
.ctx .nx .th i{position:absolute;left:0;bottom:0;height:3px;width:38%;background:var(--ac)}
.ctx .nx b{display:block;font-size:13px;line-height:1.3}
.ctx .nx span{font-size:12px;color:var(--t3)}
.fx .eq .hd{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.fx .eq .hd b{font-size:14px}
.fx .eq .hd .seg{margin-left:auto}
@keyframes sbar{to{width:100%}}
.sv .x{position:absolute;right:12px;top:20px;z-index:6;color:#fff}
.sv .rc .l{font-size:15px;color:rgba(255,255,255,.85)}
.sv .nav{position:absolute;inset:0;display:flex;z-index:4}
.sv .nav div{flex:1}
body{background:radial-gradient(900px 500px at 15% -10%,rgba(217,180,74,.07),transparent 60%),var(--bg)}
.card,.post .m,.cc,.lc,.ply,.fx .eq,.fx .kpi,.ctx .ring,.ctx .tile,.ctx .nx,.list .card,.intr,.next,.resf{box-shadow:var(--sh)}
.b.p{background:linear-gradient(180deg,var(--ac2),var(--ac));color:#1a1405;box-shadow:0 6px 18px -8px rgba(217,180,74,.7),0 1px 0 rgba(255,255,255,.35) inset}
.b.p:hover{background:linear-gradient(180deg,#F6DB7C,var(--ac2))}
.b.g{border-color:var(--ln2);background:rgba(255,255,255,.03)}
.b.g:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.28)}
.nv.on{color:var(--ac2);background:linear-gradient(90deg,rgba(217,180,74,.14),transparent)}
.nv.on svg{stroke:var(--ac2)}
.nv .n.l{color:var(--rojo)}
.logo i{background:linear-gradient(135deg,var(--ac2),#A8862A);box-shadow:0 4px 14px -6px rgba(217,180,74,.8)}
.av.k{box-shadow:0 0 0 2px var(--ac)}
.rail .card h3{color:var(--tx)}
.rail .card h3::before{content:'';width:3px;height:14px;border-radius:2px;background:var(--ac);margin-right:10px}
.hoy div{background:var(--s3);border-top:2px solid var(--ac)}
.row .r .dot{background:var(--rojo)}
.kb .b.g{background:var(--s2)}
.nrow .hd b::before{content:'';display:inline-block;width:3px;height:14px;border-radius:2px;background:var(--ac);margin-right:10px;vertical-align:-2px}
/* menú del Aula: funciones de la Academia */
.ctx .ring{background:linear-gradient(180deg,var(--s2),var(--s1))}
.ctx .ring circle.v{stroke:var(--ac2)}
.ctx .nx{background:linear-gradient(180deg,var(--s2),var(--s1))}
.ctx .fn{display:flex;align-items:center;gap:12px;height:42px;padding:0 12px;margin:0 8px;border-radius:10px;font-size:14px;color:var(--t2);cursor:pointer}
.ctx .fn:hover{background:var(--s1);color:var(--tx)}
.ctx .fn i{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-style:normal;flex:0 0 auto}
.ctx .fn svg{width:16px;height:16px}
.ctx .fn span{flex:1}
.ctx .fn small{font-size:12px;color:var(--t3)}
.ctx .fn.c1 i{background:rgba(217,180,74,.14);color:var(--ac2)}
.ctx .fn.c2 i{background:rgba(96,165,250,.14);color:var(--azul)}
.ctx .fn.c3 i{background:rgba(52,211,153,.14);color:var(--verde)}
.ctx .fn.c4 i{background:rgba(167,139,250,.14);color:var(--mor)}
.ctx .fn.c5 i{background:rgba(34,211,238,.14);color:var(--cel)}
.ctx .fn.c6 i{background:rgba(251,113,133,.14);color:var(--rojo)}
.pf .av{width:84px;height:84px;font-size:24px;margin-top:-42px;border:4px solid var(--s1);box-shadow:0 0 0 2px var(--ac)}
.pf .top .b{margin-left:auto}
.pg .c{border-top:2px solid var(--ac)}
.welcome .hd{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.welcome .hd b{font-size:15px}
.welcome .hd a{margin-left:auto;font-size:13px;color:var(--t3);cursor:pointer}
.cont .b{margin-left:auto}
.sheet .hd{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.sheet .hd b{font-size:17px}
.sheet .hd .x{margin-left:auto;color:var(--t3);cursor:pointer}
.nt2{display:flex;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--ln);cursor:pointer}
.sheet .cr{display:flex;flex-direction:column;gap:6px}
.sheet .opc{display:flex;gap:12px;align-items:center;padding:12px;border-radius:14px;background:var(--s2);border:1px solid var(--ln);cursor:pointer;transition:background .15s,border-color .15s,transform .15s}
.sheet .opc:hover{background:var(--s3);border-color:var(--ln2)}
.sheet .opc:active{transform:scale(.985)}
.sheet .opc .ic{width:40px;height:40px;border-radius:12px;background:var(--s3);display:grid;place-items:center;color:var(--ac2);flex:0 0 auto}
.sheet .opc b{display:block;font-size:15px}
.sheet .opc span:not(.ic){display:block;font-size:12.5px;color:var(--t3);margin-top:1px}
.sheet .grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.sheet .opc.c{padding:10px}
.sheet .opc.c .ic{width:34px;height:34px;border-radius:10px}
.sheet .opc.c b{font-size:14px}
.nt2:first-of-type{border-top:0}
.nt2 p{font-size:14px;line-height:1.4}
.nt2 p b{font-weight:600}
.nt2 span{font-size:12px;color:var(--t3);display:block}
.nt2 .k{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;font-size:14px}
.nt2 .k.h{background:rgba(251,113,133,.14);color:var(--rojo)}
.nt2 .k.c{background:rgba(96,165,250,.14);color:var(--azul)}
.nt2 .k.f{background:rgba(217,180,74,.14);color:var(--ac2)}
.nt2 .k.l{background:rgba(52,211,153,.14);color:var(--verde)}
.nt2.new{background:linear-gradient(90deg,rgba(217,180,74,.08),transparent);margin:0 -16px;padding:12px 16px}
.mp .top .av{width:64px;height:64px;font-size:20px}
.srch .res{display:flex;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--ln);cursor:pointer}
.srch .res:first-child{border-top:0}
.srch .res b{font-size:14px;display:block}
.srch .res span{font-size:12px;color:var(--t3)}
.srch .res .tg{margin-left:auto;font-size:11px;color:var(--t3)}
.srch input{width:100%;height:46px;border-radius:12px;background:var(--s2);border:1px solid var(--ln);padding:0 14px;outline:0;font-size:16px;margin-bottom:10px}
.post .hd .av{cursor:pointer}
.post .hd .b.on{display:none}
/* ══ v14: estados al pasar el mouse, carácter en las publicaciones, comunidades ══ */
.card,.post,.row,.cc,.lc,.tile,.fn,.ml,.chip,.tool,.act,.st,.nv,.rk,.fx tr,.list .card,.pg div,.pq div,.des,.gt,.nt2,.res{transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),color .18s}
.nt2:hover,.res:hover{background:rgba(255,255,255,.035)}
.mbar button:active svg{transform:scale(.9)}
/* avatar con anillo por nivel */
.av.n9{box-shadow:0 0 0 2px var(--ac)}
.av.n7{box-shadow:0 0 0 2px var(--azul)}
.av.n5{box-shadow:0 0 0 2px var(--verde)}
.av.n3{box-shadow:0 0 0 2px var(--mor)}
.pg .c{border-top:2px solid var(--ac)}
.cm .bd .av{width:48px;height:48px;margin-top:-24px;border:3px solid var(--s1);font-size:15px}
.cm .bd .pr .b{margin-left:auto}
.cm .bd .b.on{background:rgba(52,211,153,.14);color:var(--verde);border-color:transparent;display:inline-flex}
.sus .av{width:44px;height:44px}
.comchips button .av{width:26px;height:26px;font-size:11px}
.cc .cov .kol .av{width:20px;height:20px;font-size:8px}
@media(max-width:760px){.cont2 .b{grid-column:1/-1;height:40px}.racha .b{flex:1}.mini{left:12px;right:12px;bottom:calc(62px + env(safe-area-inset-bottom));max-width:none}}
/* e1 · superficie: en reposo */
.card,.cc,.lc,.ply,.pane,.welcome,.cm,.pf,.cont2,.racha,.file,.intr,.next,.resf,.ctx .ring,.ctx .tile,.fx .kpi,.list .card{box-shadow:var(--sh1)}
/* la barra lateral y las barras del celular son superficie, el contenido es lienzo */
.nav{background:var(--s1);border-right:1px solid var(--ln)}
.rail .card{background:linear-gradient(180deg,var(--s2),var(--s1))}
/* e2 · hover = fondo y borde del nivel siguiente; lo «levantable» sube además la sombra y 1 px */
.cc:hover,.lc:hover,.cm:hover,.cont2:hover,.list .card:hover,.ctx .tile:hover,.card.lv:hover{background:linear-gradient(180deg,var(--s3),var(--s2));border-color:var(--ln2);box-shadow:var(--sh2)}
.nt2:hover,.res:hover,.row:hover{background:rgba(255,255,255,.03)}
.tool:hover,.chip:hover,.b.g:hover{background:var(--s2);border-color:var(--ln2)}
/* e3 · flotante: menús, desplegables, avisos, toast, mini reproductor */
.menu,.sel .dd,.toast,.mini,.nuevas.e3{background:var(--s3);border:1px solid var(--ln3);box-shadow:var(--sh3)}
.toast{color:var(--tx)}
.sheet{background:var(--s3);border-top-color:var(--ln3);box-shadow:var(--sh4)}
.sheet .opc{background:var(--s4);border-color:var(--ln3)}
.sheet .opc:hover{background:var(--s5);border-color:var(--ln4)}
.sheet .opc .ic{background:rgba(255,255,255,.07)}
.sheet .nt2.new{background:linear-gradient(90deg,rgba(217,180,74,.12),transparent)}
/* nivel −1 · hundido: campos de texto */
.search,.resf input,.resf textarea,.thread .in input{background:var(--s0);border-color:var(--ln);box-shadow:var(--hund)}
.search:focus-within,.resf input:focus-visible,.resf textarea:focus-visible,.thread .in input:focus-visible,.modal .cj input:focus-visible,.modal .cj textarea:focus-visible,.modal .cj select:focus-visible{outline:none;border-color:var(--oro-b);box-shadow:var(--oro-an)}
/* pressed: vuelve a su nivel y se hunde */
.b.g:active{background:var(--s1);transform:translateY(0);box-shadow:inset 0 1px 2px rgba(3,3,6,.45)}
.b.p:active{filter:brightness(.94);box-shadow:inset 0 1px 2px rgba(3,3,6,.35)}
/* divisores dentro del lienzo, más finos que los bordes de superficie */
.main{border-color:rgba(255,255,255,.05)}
.editbar .b{margin-left:auto;height:28px}
.vacio .b{margin-top:8px}
.toast button{margin-left:14px;background:none;border:0;color:var(--ac2);font-weight:700;font-size:14px;cursor:pointer;pointer-events:auto}
.toast.on{pointer-events:auto}
.mini{position:fixed;right:20px;bottom:20px;z-index:120;display:none;align-items:center;gap:12px;padding:10px 12px 10px 14px;border-radius:14px;background:var(--s2);border:1px solid var(--ln2);box-shadow:var(--sh);max-width:360px;animation:ap .25s var(--ease)}
.mini.on{display:flex}
.mini .dot{width:8px;height:8px;border-radius:50%;background:var(--live);box-shadow:0 0 0 4px rgba(244,63,94,.18);animation:lt 1.6s infinite;flex:0 0 auto}
.mini b{display:block;font-size:14px}
.mini span{font-size:12.5px;color:var(--t3);white-space:nowrap}
.mini em{font-style:normal;color:var(--tx)}
.mini .x{color:var(--t3);font-size:14px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center}
.mini .x:hover{background:var(--s3);color:var(--tx)}
:focus-visible{outline:2px solid var(--ac2);outline-offset:2px}
.mtop .back{display:none}
body.sub .mtop .back{display:grid}
body.sub .mtop .av{display:none}
@media(max-width:1180px){.app,body.aula .app{grid-template-columns:76px minmax(0,1fr)}.rail{display:none}.nv span,.logo span,.nav .me div,.nav .pub,.ctx,.mas{display:none!important}.nv{justify-content:center;padding:0}.nv .n{display:none}}
@media(max-width:760px){html,body{overflow-x:hidden}body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}.app,body.aula .app{display:block;padding:0}.nav,.rail{display:none}.main{border:0}.mtop{display:flex;position:sticky;top:0;z-index:60;align-items:center;gap:8px;height:52px;padding:0 12px 0 16px;background:rgba(20,20,23,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--ln2)}.mtop .logo{padding:0;font-size:16px}.mtop .sp{flex:1}.mtop button{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:var(--tx);position:relative}.mtop button .pt{position:absolute;top:8px;right:8px;width:7px;height:7px;border-radius:50%;background:var(--ac)}.mbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:80;height:calc(54px + env(safe-area-inset-bottom));padding:0 8px env(safe-area-inset-bottom);background:var(--s1);border-top:1px solid var(--ln2);box-shadow:0 -6px 20px -12px rgba(3,3,6,.9);align-items:center}.mbar button{flex:1;height:54px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--t2);position:relative;font-size:11px;font-weight:500;letter-spacing:.01em}.mbar button.on{color:var(--tx)}.mbar button svg{width:25px;height:25px;stroke-width:1.5}.mbar button.on svg{stroke-width:2.3;stroke:var(--ac2)}.mbar button .crear{width:34px;height:34px;stroke:#1a1405;stroke-width:2;background:linear-gradient(180deg,var(--ac2),var(--ac));border-radius:11px;padding:6px;box-shadow:0 6px 16px -8px rgba(217,180,74,.9)}.mbar .pt{position:absolute;top:8px;right:calc(50% - 16px);width:7px;height:7px;border-radius:50%;background:var(--live);border:2px solid var(--bg)}.mbar .pt.a{background:var(--ac)}.mtop{padding:0 10px 0 14px}.mtop .logo{padding:0}.mtop .logo i{width:30px;height:30px}.post .hd .b.on{display:none}.toast{bottom:calc(66px + env(safe-area-inset-bottom))}}
/* escritorio: la hoja de celular se vuelve un diálogo centrado (13-sep) */
@media(min-width:1024px){.sheet{left:50%;right:auto;top:50%;bottom:auto;width:min(720px,calc(100vw - 48px));max-height:min(82vh,860px);border:1px solid var(--ln2);border-radius:20px;box-shadow:var(--sh);transform:translate(-50%,-50%) scale(.97);opacity:0;pointer-events:none;transition:transform .25s var(--ease),opacity .2s;padding:20px 22px 22px}.sheet.on{transform:translate(-50%,-50%);opacity:1;pointer-events:auto}.sheet .grab{display:none}}