/* ==========================================================================
   CUBO DE RUBIK 3D — Dark Luxury & Spatial Logic
   Club del Ingenio Official Application
   ========================================================================== */

:root {
  --bg-main: #070a13;
  --bg-card: rgba(15, 23, 42, 0.78);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(245, 158, 11, 0.45);
  --border-cyan: rgba(56, 189, 248, 0.38);

  --gold-primary: #f59e0b;
  --gold-light: #fbbf24;
  --cyan-primary: #38bdf8;
  --cyan-glow: rgba(56, 189, 248, 0.32);
  --emerald-primary: #10b981;
  --rose-primary: #f43f5e;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Cinzel', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 20% 15%, rgba(56, 189, 248, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.06) 0%, transparent 45%);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* === CABECERA DE PRESTIGIO (Glassmorphism Sticky) === */
.app-header {
  background: rgba(7, 10, 19, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0.65rem 1.25rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-crest {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.35));
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #fff 0%, #fde047 60%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan-primary);
  font-weight: 600;
  display: block;
}

.nav-modes {
  display: flex;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  padding: 3px;
  border-radius: var(--radius-md);
  gap: 4px;
}

.mode-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.mode-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.mode-tab.active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(56, 189, 248, 0.15) 100%);
  color: #fff;
  border: 1px solid var(--border-gold);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  border-color: var(--cyan-primary);
  background: rgba(56, 189, 248, 0.1);
  transform: translateY(-1px);
}

.btn-lang-display {
  width: auto;
  padding: 0 0.55rem;
}

.btn-back-hub {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-back-hub:hover {
  color: #fff;
  border-color: var(--gold-primary);
}

/* === MAIN LAYOUT === */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0.75rem 1rem 2rem 1rem;
}

/* Barra de Scramble WCA */
.scramble-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 1rem;
  margin-bottom: 0.75rem;
  text-align: center;
  backdrop-filter: blur(8px);
}

.scramble-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan-primary);
  font-weight: 700;
  margin-right: 0.75rem;
}

.scramble-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.05em;
  word-spacing: 0.25rem;
}

/* BARRA DE MÉTRICAS Y CRONÓMETRO WCA (EXTERNA AL VIEWPORT) */
.rubik-status-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

/* 3D VIEWPORT CONTAINER (100% LIMPIO) */
.viewport-wrapper {
  position: relative;
  width: 100%;
  height: min(60vh, 500px);
  min-height: 380px;
  background: radial-gradient(circle at center, rgba(30, 41, 59, 0.35) 0%, rgba(7, 10, 19, 0.92) 80%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.65);
  cursor: grab;
}

.viewport-wrapper:active {
  cursor: grabbing;
}

#rubik-canvas-container {
  width: 100%;
  height: 100%;
}

/* Métricas en Vivo */
.hud-stats {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hud-stat-item {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hud-stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.hud-stat-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--gold-light);
}

/* Speedcubing Timer */
.timer-overlay {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 0.45rem 1.15rem;
  text-align: right;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.timer-overlay:hover {
  border-color: var(--cyan-primary);
  box-shadow: 0 0 15px var(--cyan-glow);
}

.timer-time-val {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  transition: color 0.15s ease;
  line-height: 1;
}

.timer-time-val.holding {
  color: #ef4444; /* Red while charging */
  text-shadow: 0 0 12px rgba(239, 68, 68, 0.6);
}

.timer-time-val.ready {
  color: #10b981; /* Green when ready to solve */
  text-shadow: 0 0 16px rgba(16, 185, 129, 0.8);
}

.timer-time-val.running {
  color: var(--cyan-primary);
  text-shadow: 0 0 12px var(--cyan-glow);
}

.timer-status-msg {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Floating Action Dock */
.action-dock {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.btn-action-primary {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #070a13;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-action-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(245, 158, 11, 0.5);
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.btn-action-secondary {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-action-secondary:hover {
  border-color: var(--cyan-primary);
  background: rgba(56, 189, 248, 0.12);
  transform: translateY(-1px);
}

/* WCA Notation Buttons Bar */
.wca-buttons-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.85rem;
  flex-wrap: wrap;
}

.face-btn-group {
  display: flex;
  gap: 2px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  padding: 2px;
  border-radius: var(--radius-sm);
}

.face-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  width: 38px;
  height: 34px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.face-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.face-btn:active {
  background: var(--cyan-primary);
  color: #070a13;
  transform: scale(0.95);
}

/* === MODE PANELS === */
.mode-panel {
  display: none;
  margin-top: 1.25rem;
}

.mode-panel.active {
  display: block;
}

/* Tutor Panel (Escuela del Cubo) */
.tutor-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.tutor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tutor-title-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.tutor-badge {
  background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.tutor-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.tutor-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.tutor-algo-box {
  background: rgba(7, 10, 19, 0.85);
  border: 1px dashed var(--border-cyan);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.algo-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan-primary);
  font-weight: 700;
}

.algo-formula {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.06em;
}

/* Patterns Grid */
.patterns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}

.pattern-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pattern-card:hover {
  border-color: var(--cyan-primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.15);
}

.pattern-icon {
  font-size: 1.8rem;
}

.pattern-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.pattern-seq {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-action-small {
  margin-left: auto;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid var(--border-cyan);
  color: var(--cyan-primary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
}

/* === MODALS === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 10, 19, 0.85);
  backdrop-filter: blur(12px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
  position: relative;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: #fff;
  font-weight: 700;
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
}

.btn-close-modal:hover {
  color: #fff;
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.lang-btn {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  border-color: var(--gold-primary);
  background: rgba(245, 158, 11, 0.15);
}

.lang-btn.active {
  border-color: var(--gold-primary);
  background: rgba(245, 158, 11, 0.22);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.4);
}

.lang-flag {
  font-size: 1.4rem;
}

.help-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.help-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.help-item strong {
  color: #fff;
}

/* Toast Message */
.rubik-toast {
  position: fixed;
  top: 5rem;
  left: 50%;
  transform: translateX(-50%) translateY(-25px);
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--gold-primary);
  color: #fff;
  padding: 0.65rem 1.3rem;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.rubik-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
  .app-header {
    padding: 0.5rem 0.75rem;
  }

  .nav-modes {
    overflow-x: auto;
  }

  .mode-tab {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
    white-space: nowrap;
  }

  .viewport-wrapper {
    height: 48vh;
    min-height: 320px;
  }

  .rubik-status-strip {
    gap: 0.45rem;
  }

  .timer-overlay {
    padding: 0.35rem 0.75rem;
  }

  .timer-time-val {
    font-size: 1.4rem;
  }

  .hud-stat-item {
    padding: 0.35rem 0.55rem;
  }

  .face-btn {
    width: 32px;
    height: 30px;
    font-size: 0.78rem;
  }

  .btn-action-primary,
  .btn-action-secondary {
    padding: 0.5rem 0.85rem;
    font-size: 0.8rem;
  }
}