/* ═══════════════════════════════════════════════════════════════
   CEART — app.css · capa compartida de componentes de la app
   Tokens idénticos a los de cada página (los :root inline ganan si
   difieren). Componentes: chips de estado, feed social, bottom-sheet,
   sub-pestañas de sección y utilidades.
   ═══════════════════════════════════════════════════════════════ */
/* Tokens centralizados en css/tokens.css (fuente única de verdad).
   Cada página enlaza tokens.css antes que app.css, así que todas las
   variables --gold/--blue/--surface/… están disponibles aquí. */

/* ── STATUS CHIPS (resumen compacto arriba del feed) ─────────────── */
.status-chips{display:flex;gap:8px;overflow-x:auto;padding:2px 0 10px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.status-chips::-webkit-scrollbar{display:none}
.status-chip{
  display:inline-flex;align-items:center;gap:7px;flex-shrink:0;
  padding:8px 13px;border-radius:999px;border:1px solid var(--rule);
  background:var(--surface);font-family:var(--sans);font-size:12px;font-weight:600;
  color:var(--ink);text-decoration:none;white-space:nowrap;cursor:pointer;
  transition:transform .15s var(--ease),box-shadow .15s;
}
.status-chip:hover{transform:translateY(-1px);box-shadow:0 3px 10px rgba(1,1,1,.06)}
.status-chip .sc-ico{font-size:14px;line-height:1}
.status-chip .sc-sub{font-weight:500;color:var(--muted)}
.status-chip.ok  {background:var(--suc-bg); border-color:var(--suc-border); color:var(--suc)}
.status-chip.warn{background:var(--warn-bg);border-color:var(--warn-border);color:var(--warn)}
.status-chip.err {background:var(--err-bg); border-color:var(--err-border); color:var(--err)}
.status-chip.gold{background:var(--gold-pale);border-color:var(--gold-ring);color:var(--gold-d)}

/* ── LAYOUT DE INICIO: feed + rail ───────────────────────────────── */
.home-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;align-items:start}
@media(min-width:1100px){
  .home-grid{grid-template-columns:minmax(0,1.55fr) minmax(280px,1fr)}
  .home-rail{position:sticky;top:72px}
}

/* ── CHANNEL CHIPS del feed ──────────────────────────────────────── */
.feed-chips{display:flex;gap:7px;overflow-x:auto;padding:2px 0 12px;scrollbar-width:none}
.feed-chips::-webkit-scrollbar{display:none}
.feed-chip{
  flex-shrink:0;padding:7px 14px;border-radius:999px;border:1px solid var(--rule);
  background:var(--surface);font-family:var(--sans);font-size:12.5px;font-weight:600;
  color:var(--muted);cursor:pointer;transition:background .15s,color .15s,border-color .15s;
}
.feed-chip:hover{color:var(--ink)}
.feed-chip.active{background:var(--ink);border-color:var(--ink);color:var(--canvas)}

/* ── STORIES RAIL ────────────────────────────────────────────────── */
.feed-stories{display:flex;gap:14px;overflow-x:auto;padding:4px 2px 14px;scrollbar-width:none}
.feed-stories::-webkit-scrollbar{display:none}
.feed-story{display:flex;flex-direction:column;align-items:center;gap:6px;flex-shrink:0;cursor:pointer;border:none;background:none;font-family:var(--sans);padding:0}
.feed-story-ring{
  width:58px;height:58px;border-radius:50%;padding:2.5px;
  background:linear-gradient(135deg,var(--gold),#e94057);
  display:flex;align-items:center;justify-content:center;
}
.feed-story-ring.seen{background:var(--rule)}
.feed-story-av{
  width:100%;height:100%;border-radius:50%;border:2px solid var(--canvas);
  background:var(--surface2);color:var(--ink);object-fit:cover;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;overflow:hidden;
}
.feed-story-av img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.feed-story-name{font-size:10.5px;font-weight:600;color:var(--muted);max-width:64px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* visor de historias */
.story-lite-overlay{position:fixed;inset:0;z-index:400;background:rgba(0,0,0,.92);display:none;align-items:center;justify-content:center}
.story-lite-overlay.open{display:flex}
.story-lite-frame{position:relative;width:min(440px,100vw);height:min(86dvh,780px);border-radius:14px;overflow:hidden;background:#111;display:flex;align-items:center;justify-content:center}
.story-lite-frame img,.story-lite-frame video{max-width:100%;max-height:100%;object-fit:contain}
.story-lite-text{padding:30px;color:#fff;font-family:var(--sans);font-size:20px;font-weight:600;text-align:center;line-height:1.45;width:100%;height:100%;display:flex;align-items:center;justify-content:center}
.story-lite-head{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:10px;padding:14px 16px;background:linear-gradient(rgba(0,0,0,.55),transparent);z-index:2}
.story-lite-head .feed-story-av{width:34px;height:34px;font-size:13px;border:none}
.story-lite-author{color:#fff;font-size:13px;font-weight:700;font-family:var(--sans);flex:1}
.story-lite-close{border:none;background:none;color:#fff;font-size:26px;cursor:pointer;line-height:1;padding:4px}
.story-lite-caption{position:absolute;bottom:0;left:0;right:0;padding:18px 16px 22px;background:linear-gradient(transparent,rgba(0,0,0,.65));color:#fff;font-family:var(--sans);font-size:14px;z-index:2}
.story-lite-nav{position:absolute;top:0;bottom:0;width:38%;z-index:1;border:none;background:none;cursor:pointer}
.story-lite-nav.left{left:0}.story-lite-nav.right{right:0}
.story-lite-bars{position:absolute;top:6px;left:10px;right:10px;display:flex;gap:4px;z-index:3}
.story-lite-bar{flex:1;height:2.5px;border-radius:2px;background:rgba(255,255,255,.32)}
.story-lite-bar.done{background:#fff}

/* ── COMPOSER rápido ─────────────────────────────────────────────── */
.feed-composer{
  display:flex;gap:10px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--rule);border-radius:14px;padding:12px 14px;margin-bottom:16px;
}
.feed-composer-av{width:36px;height:36px;border-radius:50%;background:var(--ink);color:var(--canvas);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0;overflow:hidden}
.feed-composer-av img{width:100%;height:100%;object-fit:cover}
.feed-composer-body{flex:1;min-width:0}
.feed-composer textarea{
  width:100%;border:none;background:none;resize:none;outline:none;
  font-family:var(--sans);font-size:13.5px;color:var(--ink);line-height:1.5;
  min-height:22px;max-height:140px;padding:7px 0 2px;
}
.feed-composer-actions{display:flex;align-items:center;gap:8px;margin-top:6px}
.feed-composer-attach{
  display:inline-flex;align-items:center;gap:5px;border:none;background:none;cursor:pointer;
  color:var(--muted);font-family:var(--sans);font-size:11.5px;font-weight:600;padding:5px 8px;border-radius:7px;
  text-decoration:none;transition:background .15s;
}
.feed-composer-attach:hover{background:var(--surface2);color:var(--ink)}
.feed-composer-send{
  margin-left:auto;padding:7px 16px;border-radius:8px;border:none;cursor:pointer;
  background:var(--gold);color:var(--ink);font-family:var(--sans);font-size:12px;font-weight:700;
  transition:opacity .15s;
}
.feed-composer-send:disabled{opacity:.4;cursor:not-allowed}

/* ── POST CARD ───────────────────────────────────────────────────── */
.feed-list{display:flex;flex-direction:column;gap:14px}
.feed-post{
  background:var(--surface);border:1px solid var(--rule);border-radius:14px;
  padding:16px 18px;cursor:pointer;transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.feed-post:hover{box-shadow:0 6px 20px rgba(1,1,1,.05);transform:translateY(-1px)}
.feed-post-head{display:flex;align-items:center;gap:10px;margin-bottom:9px}
.feed-post-av{width:38px;height:38px;border-radius:50%;background:var(--surface2);color:var(--ink);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0;overflow:hidden}
.feed-post-av img{width:100%;height:100%;object-fit:cover}
.feed-post-author{font-size:13px;font-weight:700;color:var(--ink);font-family:var(--sans)}
.feed-post-meta{font-size:11px;color:var(--faint);font-family:var(--sans);margin-top:1px}
.feed-role-badge{display:inline-block;font-size:9px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:2px 7px;border-radius:99px;margin-left:6px;vertical-align:middle}
.feed-role-badge.teacher{background:var(--blue-pale);color:var(--blue-d)}
.feed-role-badge.admin{background:var(--gold-pale);color:var(--gold-d)}
.feed-post-pin{font-size:10px;font-weight:700;color:var(--gold-d);margin-left:auto;flex-shrink:0}
.feed-post-body{font-family:var(--sans);font-size:13.5px;color:var(--ink);line-height:1.55;white-space:pre-wrap;word-wrap:break-word}
.feed-post-media{margin-top:10px;border-radius:10px;overflow:hidden;background:var(--surface2)}
.feed-post-media.is-video{background:#000}
.feed-post-media img{width:100%;max-height:420px;object-fit:cover;display:block}
.feed-post-media video{width:100%;max-height:420px;display:block}
.feed-post-file{display:inline-flex;align-items:center;gap:7px;margin-top:10px;padding:8px 12px;border-radius:9px;background:var(--surface2);font-family:var(--sans);font-size:12px;font-weight:600;color:var(--ink);text-decoration:none}
.feed-post-foot{display:flex;align-items:center;gap:6px;margin-top:12px;flex-wrap:wrap}
.feed-react{
  display:inline-flex;align-items:center;gap:4px;border:1px solid var(--rule);background:var(--surface2);
  border-radius:999px;padding:4px 10px;cursor:pointer;font-size:13px;font-family:var(--sans);
  transition:background .15s,border-color .15s;
}
.feed-react:hover{border-color:var(--gold)}
.feed-react.active{background:var(--gold-pale);border-color:var(--gold-ring)}
.feed-react .rc{font-size:11px;font-weight:700;color:var(--muted)}
.feed-comments-link{
  margin-left:auto;display:inline-flex;align-items:center;gap:5px;border:none;background:none;cursor:pointer;
  color:var(--muted);font-family:var(--sans);font-size:12px;font-weight:600;padding:4px 8px;border-radius:7px;
}
.feed-comments-link:hover{color:var(--ink)}
.feed-more{
  display:block;width:100%;text-align:center;margin-top:16px;padding:11px;
  border-radius:10px;border:1px solid var(--rule);background:var(--surface);cursor:pointer;
  font-family:var(--sans);font-size:12.5px;font-weight:600;color:var(--muted);text-decoration:none;
  transition:background .15s,color .15s;
}
.feed-more:hover{background:var(--surface2);color:var(--ink)}
.feed-empty{text-align:center;padding:44px 16px;color:var(--faint);font-family:var(--sans)}
.feed-empty .fe-ico{font-size:36px;display:block;margin-bottom:10px}
.feed-empty p{font-size:13px}
.feed-skel{background:var(--surface);border:1px solid var(--rule);border-radius:14px;padding:16px 18px}

/* ── BOTTOM SHEET (modales en móvil) ─────────────────────────────── */
@media(max-width:600px){
  .sheet-on-mobile{align-items:flex-end!important;padding:0!important}
  .sheet-on-mobile>div{
    max-width:none!important;width:100%!important;border-radius:18px 18px 0 0!important;
    animation:sheet-up .3s var(--ease);max-height:92dvh!important;
    padding-bottom:max(20px,env(safe-area-inset-bottom))!important;
  }
  .sheet-on-mobile>div::before{
    content:'';display:block;width:40px;height:4px;border-radius:2px;
    background:var(--rule);margin:0 auto 12px;
  }
}
@keyframes sheet-up{from{transform:translateY(40px);opacity:.6}to{transform:none;opacity:1}}

/* ── SUB-PESTAÑAS de sección (Clases: asistencia/tareas/avance…) ─── */
.subnav{
  display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;
  padding:8px clamp(14px,5vw,40px) 0;background:var(--canvas);
  border-bottom:1px solid var(--rule);
}
.subnav::-webkit-scrollbar{display:none}
.subnav-tab{
  flex-shrink:0;padding:9px 14px 11px;font-family:var(--sans);font-size:12.5px;font-weight:600;
  color:var(--muted);text-decoration:none;border-bottom:2px solid transparent;
  transition:color .15s,border-color .15s;white-space:nowrap;
}
.subnav-tab:hover{color:var(--ink)}
.subnav-tab.active{color:var(--ink);border-bottom-color:var(--gold)}
/* Variante insertada al inicio del <main> (los topbars fijos tapaban la
   versión hermana del header): sin padding lateral, con margen inferior. */
.subnav-inline{padding:0;margin:0 0 18px;background:none}

/* ── Transición de página sutil ──────────────────────────────────── */
@media (prefers-reduced-motion: no-preference){
  main{animation:app-page-in .28s var(--ease) both}
}
@keyframes app-page-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ── HOJA "MÁS" del bottom-nav ───────────────────────────────────── */
.more-sheet-backdrop{position:fixed;inset:0;z-index:240;background:rgba(1,1,1,.45);display:none}
.more-sheet-backdrop.open{display:block}
.more-sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:250;background:var(--surface);
  border-radius:18px 18px 0 0;padding:10px 16px max(20px,env(safe-area-inset-bottom));
  transform:translateY(105%);transition:transform .3s var(--ease);max-height:78dvh;overflow-y:auto;
}
.more-sheet.open{transform:none}
.more-sheet::before{content:'';display:block;width:40px;height:4px;border-radius:2px;background:var(--rule);margin:6px auto 14px}
.more-sheet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.more-sheet-item{
  display:flex;flex-direction:column;align-items:center;gap:7px;padding:13px 4px;
  border-radius:12px;text-decoration:none;color:var(--ink);font-family:var(--sans);
  font-size:10.5px;font-weight:600;text-align:center;transition:background .15s;border:none;background:none;cursor:pointer;
}
.more-sheet-item:hover{background:var(--surface2)}
.more-sheet-item svg{width:21px;height:21px;color:var(--muted)}
.more-sheet-signout{color:var(--err)}
.more-sheet-signout svg{color:var(--err)}
.more-sheet-label{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);font-family:var(--sans);padding:12px 4px 8px}

/* utilidades */
.app-hidden{display:none!important}

/* ═══════════════════════════════════════════════════════════════════
   PRIMITIVAS .ui-* — el "ADN" de login, reutilizable
   ───────────────────────────────────────────────────────────────────
   Componentes opt-in para subir cada pantalla al estándar de login.
   Ningún elemento existente usa estas clases → cero cambio visual
   hasta que una pantalla las adopte. Usan los tokens de tokens.css.
   ═══════════════════════════════════════════════════════════════════ */

/* — Tarjeta: superficie + halo amplio y suave — */
.ui-card{
  background:var(--surface);
  border:1px solid var(--rule);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}
.ui-card--hover{transition:box-shadow .2s var(--ease),transform .2s var(--ease)}
.ui-card--hover:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}

/* — Cromo "ventana de navegador": los 3 puntitos de login — */
.ui-card-chrome{display:flex;gap:6px;align-items:center;padding:10px 16px;border-bottom:1px solid var(--rule)}
.ui-card-chrome>span{width:9px;height:9px;border-radius:50%;background:rgba(1,1,1,.1)}

/* — Micro-etiqueta editorial en mayúsculas — */
.ui-label{
  display:block;font-family:var(--sans);
  font-size:11px;font-weight:600;letter-spacing:.3px;
  text-transform:uppercase;color:var(--muted);
}

/* — Título serif de display (itálico), el de "Bienvenido" — */
.ui-title{font-family:var(--serif);font-size:22px;font-weight:400;font-style:italic;color:var(--ink);line-height:1.05;letter-spacing:-.01em}

/* — Input con anillo de foco dorado — */
.ui-input{
  width:100%;padding:11px 14px;
  border:1px solid var(--rule);border-radius:var(--radius-sm);
  background:var(--surface);font-family:var(--sans);font-size:14px;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.ui-input::placeholder{color:var(--faint)}
.ui-input:focus{outline:none;border-color:var(--gold);box-shadow:var(--shadow-focus)}

/* — Botones (forma y tipografía de login) — */
.ui-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;border:1px solid transparent;border-radius:var(--radius-xs);
  font-family:var(--sans);font-size:13px;font-weight:600;cursor:pointer;
  transition:background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s,opacity .18s;
}
.ui-btn:focus-visible{outline:none;box-shadow:var(--shadow-focus)}
.ui-btn:disabled{opacity:.45;cursor:not-allowed}
.ui-btn--block{width:100%}
.ui-btn--primary{background:var(--blue);color:#fff}
.ui-btn--primary:hover{background:var(--blue-d)}
.ui-btn--gold{background:var(--gold);color:var(--ink)}
.ui-btn--gold:hover{filter:brightness(.97)}
.ui-btn--ghost{background:var(--surface);color:var(--ink);border-color:rgba(1,1,1,.12)}
.ui-btn--ghost:hover{background:var(--surface2)}

/* — Control segmentado tipo iOS (el toggle Iniciar sesión/Registrarse) — */
.ui-segmented{display:flex;background:var(--surface2);border-radius:var(--radius-sm);padding:3px}
.ui-segmented>button{
  flex:1;text-align:center;padding:8px 12px;border:none;background:none;
  border-radius:var(--radius-xs);font-family:var(--sans);font-size:12px;font-weight:600;
  color:var(--muted);cursor:pointer;letter-spacing:.1px;
  transition:color .18s var(--ease),background .18s var(--ease),box-shadow .18s;
}
.ui-segmented>button.active,.ui-segmented>button[aria-selected="true"]{
  background:var(--surface);color:var(--ink);box-shadow:var(--shadow-sm);
}