/* ═══════════════════════════════════════════════════
   UNNE Material — Shared Styles
   ═══════════════════════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root {
  --bg: #0a0c10;
  --surface: #13161d;
  --surface2: #1c2030;
  --surface3: #242838;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.15);
  --text: #e8eaf0;
  --muted: #7a8099;
  --accent: #4f8ef7;
  --radius: 16px;
  --radius-sm: 10px;
}

body {
  font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

/* Emoji rendering — force system emoji fonts for icon elements */
.icon-box, .resource-icon, .infobar-icon, .empty-state .empty-icon,
.admin-item span:first-child, .ficon {
  font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji', sans-serif;
}

/* Twemoji SVG sizing */
img.emoji {
  height: 1em;
  width: 1em;
  margin: 0 .05em 0 .1em;
  vertical-align: -0.1em;
  display: inline;
}
.icon-box img.emoji, .resource-icon img.emoji, .infobar-icon img.emoji {
  height: 1.2em;
  width: 1.2em;
}
.empty-state .empty-icon img.emoji {
  height: 1.5em;
  width: 1.5em;
}

/* Orbs */
.orb { position:fixed; border-radius:50%; filter:blur(120px); pointer-events:none; z-index:0; opacity:.15 }
.orb1 { width:600px; height:600px; background:var(--accent); top:-200px; left:-100px }
.orb2 { width:400px; height:400px; background:#b57bee; bottom:-100px; right:-100px }

/* Layout */
.container { max-width:1100px; margin:0 auto; padding:0 2rem; position:relative; z-index:1 }

/* Header */
header { padding:3rem 0 0; text-align:center }
.badge {
  display:inline-flex; align-items:center; gap:8px;
  background:rgba(79,142,247,.1); border:1px solid rgba(79,142,247,.25);
  border-radius:100px; padding:6px 16px;
  font-size:12px; font-weight:500; color:#7db3fb;
  letter-spacing:.08em; text-transform:uppercase; margin-bottom:1.5rem;
}
.dot { width:6px; height:6px; background:#4f8ef7; border-radius:50%; animation:pulse 2s ease-in-out infinite }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.8)} }

h1 {
  font-family:'Syne',sans-serif; font-size:clamp(2.5rem,6vw,4.5rem);
  font-weight:800; line-height:1.05; letter-spacing:-.02em; margin-bottom:1rem;
}
h1 .hl {
  background:linear-gradient(135deg,#4f8ef7,#b57bee);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.subtitle { font-size:1.1rem; color:var(--muted); max-width:560px; margin:0 auto 1rem; line-height:1.7; font-weight:300 }

.meta { display:flex; align-items:center; justify-content:center; gap:2rem; margin:1.5rem 0 3rem; font-size:13px; color:var(--muted); flex-wrap:wrap }
.meta span { display:flex; align-items:center; gap:6px }

.divider { width:100%; height:1px; background:var(--border); margin-bottom:3rem }

/* Cuatrimestre tabs */
.tabs {
  display:flex; gap:8px; margin-bottom:2rem; flex-wrap:wrap;
}
.tab {
  padding:8px 20px; border-radius:100px;
  font-size:13px; font-weight:500; cursor:pointer;
  border:1px solid var(--border); background:transparent;
  color:var(--muted); transition:all .2s;
}
.tab:hover { border-color:var(--border-hover); color:var(--text) }
.tab.active { background:var(--accent); border-color:var(--accent); color:#fff }

/* Section labels */
.section-label {
  font-size:11px; font-weight:600; letter-spacing:.15em;
  text-transform:uppercase; color:var(--muted); margin-bottom:1.5rem;
}

/* Card grid */
.grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:1.25rem; margin-bottom:3rem }

/* Subject cards (home) */
.card {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.75rem;
  cursor:pointer; transition:transform .2s,border-color .2s,background .2s;
  position:relative; overflow:hidden; text-decoration:none; color:var(--text);
  display:block;
}
.card::before {
  content:''; position:absolute; top:0; left:0; right:0;
  height:2px; border-radius:var(--radius) var(--radius) 0 0; opacity:0; transition:opacity .2s;
  background: var(--card-color, var(--accent));
}
.card:hover { transform:translateY(-3px); background:var(--surface2) }
.card:hover::before { opacity:1 }
.card:hover { border-color: color-mix(in srgb, var(--card-color, var(--accent)) 40%, transparent) }

.icon-box {
  width:44px; height:44px; border-radius:var(--radius-sm);
  display:flex; align-items:center; justify-content:center;
  font-size:22px; margin-bottom:1rem;
  background: color-mix(in srgb, var(--card-color, var(--accent)) 12%, transparent);
}
.card-title { font-family:'Syne',sans-serif; font-size:1.15rem; font-weight:700; margin-bottom:.5rem }
.card-subtitulo { display:block; font-family:'Space Grotesk',sans-serif; font-size:.75rem; font-weight:400; color:var(--muted); margin-top:2px }
.card-desc { font-size:13.5px; color:var(--muted); line-height:1.6; margin-bottom:1rem }
.card-arrow {
  display:flex; align-items:center; gap:6px;
  font-size:12px; font-weight:600; letter-spacing:.05em; text-transform:uppercase;
  color: var(--card-color, var(--accent));
}

/* Empty state */
.empty-state {
  text-align:center; padding:3rem 2rem;
  color:var(--muted); font-size:14px;
}

/* ── Quick access cards ────────────────────────── */
.quick-access-grid {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap:12px;
  margin-bottom:1.5rem;
}
.quick-card {
  display:flex; align-items:center; gap:12px;
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:14px 16px;
  text-decoration:none; color:var(--text);
  transition:all .2s ease;
}
.quick-card:hover {
  background:var(--surface2);
  border-color:var(--accent);
  transform:translateY(-2px);
}
.quick-icon { font-size:26px; flex-shrink:0 }
.quick-info { flex:1; min-width:0 }
.quick-info strong { display:block; font-size:14px; font-weight:600; margin-bottom:2px }
.quick-info span { font-size:12px; color:var(--muted) }

/* ── Schedule pills ────────────────────────────── */
.sched-row {
  display:flex; flex-wrap:wrap; gap:6px; margin-bottom:6px;
}
.sched-pill {
  display:inline-flex; align-items:center; gap:4px;
  background:rgba(255,255,255,0.05); border:1px solid var(--border);
  border-radius:6px; padding:4px 8px;
  font-size:11px; color:var(--text); white-space:nowrap;
}
.sched-pill b { color:var(--accent); font-weight:700 }
.sched-tipo {
  font-size:9px; color:var(--muted);
  background:rgba(255,255,255,0.04); border-radius:3px;
  padding:1px 4px; margin-left:2px;
}
.sched-note {
  font-size:11px; color:var(--muted); font-style:italic;
  margin-bottom:10px;
}
.card .sched-row { margin-top:auto; margin-bottom:8px }
.card .sched-note { margin-bottom:6px }
.subject-schedule { margin-bottom:1.5rem }
.empty-state .empty-icon { font-size:40px; margin-bottom:1rem; opacity:.5 }

/* ═══════════════════════════════════════════════════
   Subject page
   ═══════════════════════════════════════════════════ */
.subject-header {
  padding:2rem 0 1.5rem;
}
.back-link {
  display:inline-flex; align-items:center; gap:6px;
  color:var(--muted); text-decoration:none; font-size:13px;
  margin-bottom:1.5rem; transition:color .2s;
}
.back-link:hover { color:var(--text) }
.subject-title {
  display:flex; align-items:center; gap:16px;
  margin-bottom:.5rem;
}
.subject-title .icon-box { margin-bottom:0; width:52px; height:52px; font-size:26px }
.subject-title h1 { font-size:clamp(1.8rem,4vw,2.5rem) }
.subject-desc { color:var(--muted); font-size:15px; margin-bottom:2rem; max-width:600px }

/* Resource cards */
.resource-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:1rem; margin-bottom:2.5rem }
.resource-card {
  display:flex; align-items:center; gap:14px;
  background:var(--surface); border:1px solid var(--border);
  border-radius:12px; padding:1.1rem 1.25rem;
  text-decoration:none; color:var(--text);
  transition:transform .2s,border-color .2s,background .2s;
}
.resource-card:hover { transform:translateY(-2px); background:var(--surface2); border-color:var(--border-hover) }
.resource-icon {
  width:40px; height:40px; border-radius:var(--radius-sm);
  display:flex; align-items:center; justify-content:center;
  font-size:18px; flex-shrink:0;
  background: color-mix(in srgb, var(--card-color, var(--accent)) 12%, transparent);
}
.resource-name { font-size:14px; font-weight:500 }
.resource-type { font-size:11px; color:var(--muted); margin-top:2px }
.resource-arrow { margin-left:auto; color:var(--muted); font-size:16px; transition:transform .2s }
.resource-card:hover .resource-arrow { transform:translateX(3px); color:var(--text) }

/* Video grid */
.video-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:1rem; margin-bottom:2.5rem }
.video-card {
  background:var(--surface); border:1px solid var(--border);
  border-radius:12px; overflow:hidden;
  text-decoration:none; color:var(--text);
  transition:transform .2s,border-color .2s;
}
.video-card:hover { transform:translateY(-3px); border-color:var(--border-hover) }
.video-thumb {
  position:relative; padding-bottom:56.25%; background:var(--surface2);
}
.video-thumb img { position:absolute; top:0; left:0; width:100%; height:100%; object-fit:cover }
.video-play {
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  background:rgba(0,0,0,.3); opacity:0; transition:opacity .2s;
}
.video-card:hover .video-play { opacity:1 }
.play-btn {
  width:48px; height:48px; background:rgba(255,0,0,.9);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-size:18px; color:#fff;
}
.video-info { padding:.875rem 1rem }
.video-info strong { display:block; font-size:13.5px; margin-bottom:4px; line-height:1.4 }
.video-info span { font-size:11px; color:var(--muted) }

/* Link cards */
.link-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:1rem; margin-bottom:2.5rem }

/* Info bar */
.infobar {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.5rem 2rem;
  display:flex; align-items:center; gap:1.5rem; margin-bottom:3rem; flex-wrap:wrap;
}
.infobar-icon {
  width:42px; height:42px; background:rgba(79,142,247,.1);
  border-radius:var(--radius-sm); display:flex; align-items:center; justify-content:center;
  font-size:20px; flex-shrink:0;
}
.infobar-text { flex:1; min-width:200px }
.infobar-text strong { display:block; font-size:14px; font-weight:500; margin-bottom:2px }
.infobar-text p { font-size:13px; color:var(--muted); line-height:1.5 }

/* Footer */
footer {
  text-align:center; padding:2rem 0 3rem;
  font-size:12px; color:var(--muted);
  border-top:1px solid var(--border);
}
footer a { color:var(--text); text-decoration:none; font-weight:600; transition:color .2s }
footer a:hover { color:var(--accent) }

/* ═══════════════════════════════════════════════════
   Admin
   ═══════════════════════════════════════════════════ */
.admin-login {
  max-width:360px; margin:15vh auto; padding:2rem;
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); text-align:center;
}
.admin-login h2 { font-family:'Syne',sans-serif; margin-bottom:1rem }
.admin-input {
  width:100%; padding:10px 14px; border-radius:8px;
  border:1px solid var(--border); background:var(--surface2);
  color:var(--text); font-size:14px; margin-bottom:1rem;
  outline:none; transition:border-color .2s;
}
.admin-input:focus { border-color:var(--accent) }
.admin-btn {
  width:100%; padding:10px; border-radius:8px;
  border:none; background:var(--accent); color:#fff;
  font-size:14px; font-weight:600; cursor:pointer;
  transition:opacity .2s;
}
.admin-btn:hover { opacity:.85 }
.admin-btn:disabled { opacity:.5; cursor:not-allowed }

.admin-toolbar {
  display:flex; align-items:center; justify-content:space-between;
  padding:1rem 0; margin-bottom:1.5rem; border-bottom:1px solid var(--border);
  flex-wrap:wrap; gap:1rem;
}
.admin-toolbar h2 { font-family:'Syne',sans-serif; font-size:1.3rem }
.admin-actions { display:flex; gap:8px }
.btn-secondary {
  padding:8px 16px; border-radius:8px;
  border:1px solid var(--border); background:var(--surface2);
  color:var(--text); font-size:13px; font-weight:500; cursor:pointer;
  transition:all .2s;
}
.btn-secondary:hover { border-color:var(--border-hover); background:var(--surface3) }
.btn-primary {
  padding:8px 16px; border-radius:8px;
  border:none; background:var(--accent); color:#fff;
  font-size:13px; font-weight:600; cursor:pointer;
  transition:opacity .2s;
}
.btn-primary:hover { opacity:.85 }
.btn-danger {
  padding:6px 12px; border-radius:6px;
  border:1px solid rgba(229,57,53,.3); background:rgba(229,57,53,.1);
  color:#ef5350; font-size:12px; cursor:pointer; transition:all .2s;
}
.btn-danger:hover { background:rgba(229,57,53,.2) }

.admin-section {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.5rem; margin-bottom:1.5rem;
}
.admin-section h3 {
  font-size:14px; font-weight:600; margin-bottom:1rem;
  display:flex; align-items:center; gap:8px;
}
.admin-item {
  display:flex; align-items:center; gap:12px;
  padding:10px 12px; border-radius:8px;
  background:var(--surface2); margin-bottom:8px;
  font-size:13px;
}
.admin-item .item-name { flex:1 }
.admin-item .item-url { color:var(--muted); font-size:11px; max-width:200px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap }

/* Modal */
.modal-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,.6);
  display:flex; align-items:center; justify-content:center;
  z-index:100; opacity:0; pointer-events:none; transition:opacity .2s;
}
.modal-overlay.active { opacity:1; pointer-events:all }
.modal {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:2rem;
  width:90%; max-width:500px; max-height:80vh; overflow-y:auto;
}
.modal h3 { font-family:'Syne',sans-serif; margin-bottom:1.5rem }
.form-group { margin-bottom:1rem }
.form-group label { display:block; font-size:12px; font-weight:500; color:var(--muted); margin-bottom:4px; text-transform:uppercase; letter-spacing:.05em }
.form-group input, .form-group select, .form-group textarea {
  width:100%; padding:10px 14px; border-radius:8px;
  border:1px solid var(--border); background:var(--surface2);
  color:var(--text); font-size:14px; font-family:inherit;
  outline:none; transition:border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color:var(--accent) }
.form-group textarea { resize:vertical; min-height:60px }
.form-actions { display:flex; gap:8px; justify-content:flex-end; margin-top:1.5rem }

/* Toast */
.toast {
  position:fixed; bottom:2rem; right:2rem; z-index:200;
  padding:12px 20px; border-radius:10px;
  background:#1e7e34; color:#fff; font-size:13px; font-weight:500;
  transform:translateY(100px); opacity:0; transition:all .3s;
}
.toast.show { transform:translateY(0); opacity:1 }
.toast.error { background:#c0392b }

/* Emoji picker */
.emoji-picker {
  background:var(--surface2); border:1px solid var(--border);
  border-radius:10px; padding:12px; position:relative;
}
.emoji-selected {
  font-size:32px; text-align:center; margin-bottom:10px;
  padding:8px; background:var(--surface); border-radius:8px;
  line-height:1.2;
}
.emoji-groups {
  max-height:180px; overflow-y:auto; padding-right:4px;
}
.emoji-groups::-webkit-scrollbar { width:4px }
.emoji-groups::-webkit-scrollbar-thumb { background:var(--border-hover); border-radius:4px }
.emoji-group-label {
  font-size:10px; font-weight:600; color:var(--muted);
  text-transform:uppercase; letter-spacing:.08em;
  margin:8px 0 4px; padding-left:2px;
}
.emoji-group-label:first-child { margin-top:0 }
.emoji-grid {
  display:grid; grid-template-columns:repeat(8,1fr); gap:4px;
}
.emoji-opt {
  width:100%; aspect-ratio:1; display:flex; align-items:center; justify-content:center;
  font-size:18px; border:2px solid transparent; border-radius:8px;
  background:var(--surface); cursor:pointer; transition:all .15s;
  padding:0; line-height:1;
}
.emoji-opt:hover { background:var(--surface3); border-color:var(--border-hover) }
.emoji-opt.selected { border-color:var(--accent); background:rgba(79,142,247,.15) }
.emoji-opt img.emoji { height:18px; width:18px; margin:0 }

/* Responsive */
@media (max-width:768px) {
  .container { padding:0 1rem }
  header { padding:2rem 0 0 }
  h1 { font-size:clamp(2rem,8vw,3rem) }
  .subtitle { font-size:1rem }
  .meta { gap:.75rem; font-size:12px }
  .badge { font-size:10px; padding:5px 12px }
  .grid { grid-template-columns:1fr; gap:1rem }
  .resource-grid { grid-template-columns:1fr }
  .video-grid { grid-template-columns:1fr }
  .tabs { gap:6px }
  .tab { padding:8px 16px; font-size:12px }
  .card { padding:1.25rem }
  .infobar { padding:1.25rem; gap:1rem }
  .infobar-text p { font-size:12px }
  .subject-title { gap:12px }
  .subject-title .icon-box { width:44px; height:44px; font-size:22px }
  .subject-title h1 { font-size:1.5rem }
  .admin-toolbar { flex-direction:column; align-items:flex-start }
  .admin-item { flex-wrap:wrap; gap:8px }
  .admin-item .item-url { max-width:100%; flex-basis:100% }
  .modal { padding:1.25rem; width:95% }
}

/* Touch-friendly: ensure min 44px tap targets */
@media (pointer:coarse) {
  .card { min-height:44px }
  .resource-card { min-height:56px; padding:1rem 1.25rem }
  .tab { min-height:44px }
  .btn-secondary, .btn-primary, .btn-danger { min-height:40px }
  .back-link { padding:8px 0; min-height:44px; display:inline-flex; align-items:center }
}

/* Safe area for notched phones */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  footer { padding-bottom:calc(2rem + env(safe-area-inset-bottom)) }
  .toast { bottom:calc(2rem + env(safe-area-inset-bottom)) }
}