/* ── TySongBeat · Apple Design System ──
   Materiales translúcidos, springs, tipografía óptica, light/dark.
   Skill: apple-design (§1-§17) */

:root {
  color-scheme: dark light;

  /* Acento identidad (rosa) calibrado por esquema */
  --accent: #e91e63;
  --accent-2: #ff5722;
  --accent-ink: #fff;
  --accent-soft: rgba(233, 30, 99, 0.16);

  /* Dark (default) */
  --bg: #0b0b12;
  --bg-gradient: radial-gradient(circle at top left, #1a0f24, #0b0b12 45%);
  --surface: rgba(22, 22, 31, 0.6);
  --surface-solid: #16161f;
  --surface-hover: rgba(29, 29, 40, 0.85);
  --card: rgba(22, 22, 31, 0.6);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f5f7;
  --text-2: #9898a3;
  --text-3: #5a5a66;
  --green: #30d158;
  --blue: #0a84ff;
  --orange: #ff9f0a;
  --purple: #bf5af2;
  --red: #ff453a;
  --success-bg: rgba(48, 209, 88, 0.12);
  --error-bg: rgba(255, 69, 58, 0.12);
  --info-bg: rgba(10, 132, 255, 0.14);
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.6);
  --glass-blur: blur(20px) saturate(180%);
  --radius-s: 10px;
  --radius-m: 14px;
  --radius-l: 18px;

  /* Motion: springs vía Motion lib; fallback CSS espejado reversible */
  --spring-default: cubic-bezier(0.32, 0.72, 0.35, 1);
  --spring-snappy: cubic-bezier(0.3, 1.2, 0.4, 1);
  --dur-instant: 100ms;
  --dur-fast: 200ms;
  --dur-med: 350ms;

  font: 100%/1.5 system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: light) {
  :root {
    --accent: #d81b60;
    --accent-2: #ff5722;
    --accent-soft: rgba(216, 27, 96, 0.12);
    --bg: #f5f5f7;
    --bg-gradient: radial-gradient(circle at top left, #ffe4ec, #f5f5f7 55%);
    --surface: rgba(255, 255, 255, 0.68);
    --surface-solid: #ffffff;
    --surface-hover: rgba(255, 255, 255, 0.9);
    --card: rgba(255, 255, 255, 0.68);
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --text: #1d1d1f;
    --text-2: #6e6e73;
    --text-3: #aeaeb2;
    --green: #1a9e54;
    --blue: #0a84ff;
    --orange: #e8641b;
    --purple: #8e4ae9;
    --red: #d70015;
    --success-bg: rgba(26, 158, 84, 0.12);
    --error-bg: rgba(215, 0, 21, 0.1);
    --info-bg: rgba(10, 132, 255, 0.12);
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.22);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  font-synthesis-weight: auto;
}

/* ── Tipografía óptica (§15): tracking específico por tamaño ── */
.display, header h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.022em;
  font-weight: 700;
  text-wrap: balance;
}
h2, .card h2, .card h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.card h3, .section-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--accent);
}
p, .song-info p, .queue-info p { line-height: 1.5; letter-spacing: 0; }
small, .fingerprint, .stat-label, .status-badge {
  letter-spacing: 0.02em;
}
.fingerprint { font-size: 0.75rem; color: var(--text-3); text-align: center; margin-top: 1.5rem; }

.container { max-width: 75rem; margin: 0 auto; padding: 1.75rem 1.5rem; }
.client-wrap { max-width: 45rem; margin: 0 auto; padding: 1.5rem; }

/* ── Header / toolbar como material flotante (§12) ── */
header.app-header {
  position: sticky;
  top: 0.75rem;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  background: var(--surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-sm);
}
@media (prefers-color-scheme: light) {
  header.app-header { border-top-color: rgba(255, 255, 255, 0.4); }
}
header.hero-center { display: block; text-align: center; }
header.hero-center p, .venue-sub { color: var(--text-2); font-size: 1.05rem; }
.venue-tag {
  font-size: 0.95rem;
  color: var(--text-2);
  background: var(--accent-soft);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  backdrop-filter: blur(6px);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Edge-fade donde el chrome flotante se solapa con contenido (§12) */
.edge-fade-b {
  -webkit-mask-image: linear-gradient(to bottom, black 85%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 85%, transparent 100%);
}

/* ── Cards / superficies ── */
.card, .panel-card {
  background: var(--card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-l);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  will-change: transform;
}
@media (prefers-color-scheme: light) {
  .card, .panel-card { border-top-color: rgba(255, 255, 255, 0.35); }
}
.card h2 { font-size: 1.25rem; margin-bottom: 0.75rem; }
.card p { color: var(--text-2); margin-bottom: 1rem; }

/* ── Botones: respuesta en pointer-down (§1, §10) ── */
.btn, button.action, .search-box button, .video-btn, .btn-save, .btn-new {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  background: var(--surface-hover);
  border: 1px solid var(--border);
  transition: transform var(--dur-instant) ease-out, filter var(--dur-fast) var(--spring-default), box-shadow var(--dur-fast) var(--spring-default), background var(--dur-fast) ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.btn:active, .search-box button:active, .video-btn:active {
  transform: scale(0.97);
  transition: transform var(--dur-instant) ease-out;
}
.btn:hover { filter: brightness(1.06); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary, .search-box button, .video-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: none;
}
.btn-primary:hover, .search-box button:hover:not(:disabled), .video-btn:hover {
  box-shadow: 0 10px 28px rgba(216, 27, 96, 0.35);
}
.btn-danger, .btn-remove, .btn-delete { background: var(--red); color: #fff; border: none; }
.btn-warning, .btn-skip { background: var(--orange); color: #fff; border: none; }
.btn-ok, .btn-add-queue, .btn-playlist, .btn-save, .btn-new, .btn-confirm { background: var(--green); color: #fff; border: none; }
.btn-blue, .btn-play, .btn-view, .btn-add-playlist { background: var(--blue); color: #fff; border: none; }
.btn-move { background: var(--purple); color: #fff; border: none; }
.btn-cancel { background: var(--surface-hover); color: var(--text); }
.btn-add { padding: 0.5rem 1rem; font-size: 0.85rem; }

/* ── Búsqueda: barra glass (§12) ── */
.search-box, .search-section {
  position: sticky;
  top: 5.25rem;
  z-index: 15;
  display: flex;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
  padding: 0.6rem;
  background: var(--surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-sm);
}
.search-box input, .search-section input, .login-form input, .dialog-content input {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--border-strong);
  background: var(--surface-solid);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.search-box input:focus, .search-section input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ── Listas de canciones / cola ── */
.results, .results-grid { display: flex; flex-direction: column; gap: 0.75rem; }
.song-card, .queue-item, .queue-item-admin, .playlist-item, .playlist-card {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.85rem;
  border-radius: var(--radius-m);
  background: var(--card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  transition: transform var(--dur-med) var(--spring-default), border-color var(--dur-fast) ease, background var(--dur-fast) ease;
  will-change: transform, opacity;
}
.song-card:hover, .queue-item-admin:hover { border-color: var(--border-strong); }
.song-card img, .queue-item img, .queue-item-admin img { width: 6rem; height: 4.5rem; border-radius: 10px; object-fit: cover; flex-shrink: 0; background: var(--border); }
.queue-item img, .queue-item-admin img { width: 4.5rem; height: 3.375rem; border-radius: 8px; }
.song-info, .queue-info, .info { flex: 1; min-width: 0; }
.song-info h3, .queue-info h4, .info h4 {
  font-size: 0.95rem;
  line-height: 1.35;
  letter-spacing: -0.005em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.song-info p, .queue-info p, .info p { font-size: 0.82rem; color: var(--text-2); }
.song-card .add-btn { flex-shrink: 0; }
.queue-section { margin-top: 2.25rem; }
.queue-section h2 { font-size: 1.3rem; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.6rem; }
.queue-item.playing, .queue-item-admin.playing {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-soft), var(--card));
  box-shadow: 0 0 16px var(--accent-soft);
}
.queue-item .pos, .queue-item-admin .pos {
  width: 2.1rem; height: 2.1rem; border-radius: 50%;
  background: var(--border); color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; flex-shrink: 0;
}
.queue-item.playing .pos, .queue-item-admin.playing .pos { background: var(--accent); color: #fff; }
.queue-list { list-style: none; }
.queue-list li { margin-bottom: 0.5rem; }
.actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.actions button { padding: 0.5rem 0.9rem; border-radius: 8px; border: none; font-size: 0.85rem; cursor: pointer; font-weight: 600; color: #fff; transition: transform var(--dur-instant) ease-out, filter var(--dur-fast) ease; }
.actions button:active { transform: scale(0.95); }
.actions button:hover { filter: brightness(1.1); }
.now-playing-hero {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; border-radius: var(--radius-l);
  padding: 1.25rem; margin-bottom: 1rem; text-align: center;
  box-shadow: var(--shadow-md);
}
.now-playing-hero h3 { font-size: 0.9rem; opacity: 0.85; margin-bottom: 0.25rem; letter-spacing: 0.04em; text-transform: uppercase; }
.now-playing-hero .song-title { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.01em; }
.status-badge { padding: 0.375rem 0.875rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; flex-shrink: 0; }
.status-playing { background: var(--accent); color: #fff; }
.status-pending { background: var(--border); color: var(--text-2); }
.empty, .empty-msg { text-align: center; color: var(--text-2); padding: 3rem 1.5rem; font-size: 1rem; }
.empty .btn { margin-top: 1rem; }

/* ── Mensajes causales (§13, §16: 4 tipos de feedback) ── */
.msg { padding: 0.875rem 1.1rem; border-radius: 12px; margin-bottom: 1rem; font-size: 0.95rem; border: 1px solid var(--border); will-change: transform, opacity; }
.msg.error { background: var(--error-bg); color: var(--red); }
.msg.success { background: var(--success-bg); color: var(--green); }
.msg.info { background: var(--info-bg); color: var(--blue); }
.error-msg { color: var(--red); font-size: 0.9rem; min-height: 1.25rem; margin-bottom: 0.5rem; }

/* ── Puerta de nombre (no descartable) ── */
.sheet-handle { width: 2.5rem; height: 0.3rem; border-radius: 999px; background: var(--border-strong); margin: 0 auto 1rem; }
#name-gate .dialog-content { text-align: center; }
#name-gate input { width: 100%; margin: 1rem 0 0.5rem; text-align: center; font-size: 1.1rem; }
#name-gate .dialog-actions { justify-content: stretch; }
#name-gate .dialog-actions button { width: 100%; }

/* ── Espera ── */
.tab-btn .badge {
  display: inline-block; min-width: 1.4rem; padding: 0.1rem 0.4rem; margin-left: 0.4rem;
  border-radius: 999px; background: rgba(255,255,255,0.25);
  font-size: 0.75rem; font-weight: 700;
}
.tab-btn.active .badge { background: rgba(255,255,255,0.3); }
.tab-btn .badge.zero { opacity: 0.4; }
.btn-approve-first { background: var(--green); color: #fff; }
.btn-approve-last { background: var(--blue); color: #fff; }
.waiting-sub { color: var(--text-2); font-size: 0.85rem; margin-bottom: 0.875rem; }
/* compat con clases antiguas */
.error:not(input), .success:not(input), .info-msg { padding: 0.875rem 1.1rem; border-radius: 12px; margin-bottom: 1rem; font-size: 0.95rem; border: 1px solid var(--border); }
.error:not(input) { background: var(--error-bg); color: var(--red); }
.success:not(input) { background: var(--success-bg); color: var(--green); }
.info-msg { background: var(--info-bg); color: var(--blue); }
.demo-badge { background: var(--accent); color: #fff; padding: 0.15rem 0.6rem; border-radius: 6px; font-size: 0.72rem; margin-left: 0.6rem; letter-spacing: 0.04em; }
.loading { text-align: center; color: var(--text-2); padding: 1.5rem; }
.skeleton { border-radius: var(--radius-m); background: linear-gradient(100deg, var(--border) 30%, var(--surface-hover) 50%, var(--border) 70%); background-size: 200% 100%; animation: shimmer 1.2s infinite linear; min-height: 5.2rem; }
@keyframes shimmer { to { background-position: -200% 0; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ── Admin ── */
.login-form { max-width: 27.5rem; margin: 6rem auto; padding: 2.5rem; background: var(--card); backdrop-filter: var(--glass-blur); border-radius: var(--radius-l); border: 1px solid var(--border); box-shadow: var(--shadow-lg); text-align: center; display: flex; flex-direction: column; gap: 0.75rem; }
.login-form h2 { margin-bottom: 0.5rem; }
.hidden { display: none !important; }
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.full-width { grid-column: 1 / -1; }
.top-row { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }
.qr-card { text-align: center; }
.qr-card img { width: 12.5rem; height: 12.5rem; margin: 0.875rem 0; border-radius: 14px; border: 3px solid var(--border-strong); background: #fff; }
.qr-card .qr-link { display: block; color: var(--accent); text-decoration: none; font-size: 0.85rem; margin-bottom: 1rem; word-break: break-all; }
.stat-row { display: flex; gap: 0.75rem; }
.stat-row.col { flex-direction: column; }
.stat-box { flex: 1; background: var(--surface-solid); padding: 1.1rem 0.875rem; border-radius: 12px; text-align: center; border: 1px solid var(--border); }
.stat-box .number { font-size: 2rem; font-weight: 700; color: var(--accent); letter-spacing: -0.02em; line-height: 1.1; }
.stat-box .label { font-size: 0.75rem; color: var(--text-2); margin-top: 0.25rem; text-transform: uppercase; letter-spacing: 0.06em; }
.config-row { display: flex; justify-content: space-between; align-items: center; padding: 0.875rem 0; border-bottom: 1px solid var(--border); }
.config-row:last-child { border-bottom: none; }
.config-row label { color: var(--text-2); font-size: 0.95rem; }
.config-row input[type="number"] { background: var(--surface-solid); border: 1px solid var(--border-strong); color: var(--text); padding: 0.5rem 0.875rem; border-radius: 8px; width: 5.6rem; text-align: center; font-size: 0.95rem; }
.config-row input[type="checkbox"] { width: 1.375rem; height: 1.375rem; accent-color: var(--accent); }

/* Tabs como segmented control iOS (§16 familiaridad) */
.tabs {
  position: sticky; top: 0; z-index: 5;
  display: flex; gap: 0.25rem; margin-bottom: 1.1rem;
  background: var(--surface); backdrop-filter: var(--glass-blur);
  border-radius: 12px; padding: 0.25rem; border: 1px solid var(--border);
}
.tab-btn { flex: 1; padding: 0.75rem; border-radius: 10px; border: none; background: transparent; color: var(--text-2); cursor: pointer; font-size: 0.95rem; font-weight: 600; transition: all var(--dur-fast) var(--spring-default); }
.tab-btn.active { background: var(--accent); color: #fff; box-shadow: 0 4px 14px var(--accent-soft); }
.tab-content { display: none; }
.tab-content.active { display: block; }
.scroll-area { max-height: 60vh; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.scroll-area::-webkit-scrollbar { width: 8px; }
.scroll-area::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

/* ── Sheets / dialogs: materializan (§12), entrada simétrica (§7) ── */
.dialog-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 1rem;
  opacity: 1;
}
@media (min-width: 640px) { .dialog-overlay { align-items: center; } }
.dialog-content {
  background: var(--surface-solid);
  padding: 2rem; border-radius: 20px;
  border: 1px solid var(--border-strong);
  width: 100%; max-width: 24rem; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
  will-change: transform, opacity;
  transform-origin: 50% 100%;
}
@media (min-width: 640px) { .dialog-content { transform-origin: 50% 50%; } }
.dialog-content h3 { margin-bottom: 1.25rem; color: var(--accent); font-size: 1.25rem; letter-spacing: -0.01em; }
.dialog-actions { display: flex; gap: 0.625rem; justify-content: flex-end; margin-top: 1rem; }
.dialog-actions button { padding: 0.75rem 1.5rem; border-radius: 10px; border: none; font-size: 0.95rem; cursor: pointer; font-weight: 600; }
/* compat modal antiguo */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.4); backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 1rem; }
.modal-content { background: var(--surface-solid); border: 1px solid var(--border-strong); border-radius: 20px; padding: 1.875rem; max-width: 25rem; width: 100%; text-align: center; position: relative; box-shadow: var(--shadow-lg); }

footer { text-align: center; padding: 1.875rem 1.25rem; color: var(--text-2); font-size: 0.85rem; border-top: 1px solid var(--border); margin-top: 2.5rem; }
.hint { font-size: 0.85rem; color: var(--text-2); margin-top: 0.5rem; }

/* ── Player ── */
.player-stage { position: fixed; inset: 0; background: #000; }
.player-glass {
  background: rgba(20, 20, 24, 0.55);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}
.player-glass h2 { font-weight: 700; letter-spacing: -0.01em; }
.player-glass p { color: rgba(255, 255, 255, 0.75); font-weight: 500; letter-spacing: 0.02em; }

/* ── Responsive (§16 flexibilidad) ── */
@media (max-width: 56.25rem) {
  .top-row, .panel-grid { grid-template-columns: 1fr; }
  header.app-header { flex-wrap: wrap; }
  .search-box { top: 0.5rem; flex-wrap: wrap; }
  .search-box button { width: 100%; }
}
@media (max-width: 37.5rem) {
  .container, .client-wrap { padding: 1rem; }
  header.app-header { top: 0.5rem; }
  .song-card, .queue-item-admin { flex-wrap: wrap; }
  .song-card .add-btn, .song-card .actions, .queue-item-admin .actions { width: 100%; justify-content: flex-end; }
}

/* ── Reduced motion / transparency / contrast (§14) ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .skeleton { animation: none; }
  .song-card, .queue-item, .queue-item-admin, .dialog-content { transform: none !important; }
}
@media (prefers-reduced-transparency: reduce) {
  :root { --surface: var(--surface-solid); --card: var(--surface-solid); }
  .card, .panel-card, .song-card, header.app-header, .search-box, .tabs, .dialog-overlay { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .dialog-overlay { background: rgba(0, 0, 0, 0.7); }
}
@media (prefers-contrast: more) {
  :root { --border: currentColor; --border-strong: currentColor; }
  .card, .song-card, .search-box input, .dialog-content { border-width: 2px; }
}