/* ==========================================================================
   Estilos principales: Cubo de Rubik 3D Hiperrealista (Speedcube Studio)
   ========================================================================== */

:root {
  --bg-primary: #0a0b0e;
  --bg-secondary: #12141a;
  --bg-card: rgba(22, 26, 35, 0.85);
  --bg-card-hover: rgba(30, 35, 48, 0.95);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-cyan: #06b6d4;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #f1f5f9;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.06);
}

/* Reset y base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout de contención */
.tool-layout {
  max-width: 1240px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
}

.tool-with-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  width: 100%;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    grid-template-columns: 1fr 300px;
  }
}

.tool-main-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-width: 0;
  width: 100%;
}

/* ==========================================================================
   Lienzo 3D principal y HUD flotante
   ========================================================================== */

.rubik-stage-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
}

.rubik-viewport-container {
  width: 100%;
  height: clamp(580px, 75vh, 820px);
  min-height: 540px;
  position: relative;
  background: radial-gradient(circle at 50% 35%, rgba(35, 42, 60, 0.55) 0%, rgba(10, 11, 14, 0.98) 100%);
  cursor: grab;
  user-select: none;
  touch-action: none;
}

.rubik-viewport-container:active {
  cursor: grabbing;
}

/* HUD Superior en el viewport */
.rubik-hud-top {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  z-index: 10;
}

.scramble-badge-container {
  pointer-events: auto;
  background: rgba(18, 20, 26, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  max-width: 75%;
}

.scramble-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
}

.scramble-formula {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: all;
}

.scramble-formula.highlight-pulse {
  animation: pulse-formula 0.4s ease;
}

@keyframes pulse-formula {
  0% { color: var(--accent-cyan); transform: scale(1.02); }
  100% { color: var(--text-primary); transform: scale(1); }
}

.hud-actions-group {
  display: flex;
  gap: 0.5rem;
  pointer-events: auto;
}

.btn-hud-icon {
  width: 38px;
  height: 38px;
  min-height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(18, 20, 26, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-hud-icon:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.btn-hud-icon.btn-active {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* HUD Inferior: Cronómetro de Speedcubing */
.rubik-hud-bottom {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
  z-index: 10;
  width: calc(100% - 2rem);
  max-width: 480px;
}

.timer-pill {
  pointer-events: auto;
  background: rgba(15, 17, 23, 0.88);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0.6rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  width: 100%;
}

.timer-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: color 0.15s ease;
}

.timer-number.timer-inspection {
  color: var(--accent-warning);
}

.timer-number.timer-holding {
  color: var(--accent-danger);
}

.timer-number.timer-ready {
  color: var(--accent-success);
}

.timer-number.timer-running {
  color: var(--accent-cyan);
}

.timer-subtext {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  text-align: center;
}

.btn-touch-timer {
  display: none;
  width: 100%;
  margin-top: 0.5rem;
  min-height: 42px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

@media (max-width: 768px) {
  .rubik-viewport-container {
    height: 440px;
  }
  .timer-number {
    font-size: 2rem;
  }
  .btn-touch-timer {
    display: block;
  }
  .scramble-badge-container {
    max-width: 60%;
  }
}

/* ==========================================================================
   Botonera principal de control
   ========================================================================== */

.controls-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.btn-action {
  min-height: 44px;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-primary-scramble {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-primary-scramble:hover {
  background: linear-gradient(135deg, #047857 0%, #059669 100%);
  transform: translateY(-1px);
}

.btn-secondary-solve {
  background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-secondary-solve:hover {
  background: linear-gradient(135deg, #4338ca 0%, #4f46e5 100%);
  transform: translateY(-1px);
}

.btn-outline-step {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-outline-step:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-outline-reset {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.btn-outline-reset:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.5);
}

/* Botonera de giro de capas WCA */
.face-turns-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.face-turns-header {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.face-turns-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.face-turns-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.face-buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.65rem;
}

.face-btn-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
}

.face-btn-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  text-align: center;
}

.face-btn-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.btn-face-turn {
  min-height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.btn-face-turn:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.btn-face-turn:active {
  transform: scale(0.96);
}

/* Visor de resolución paso a paso */
.solve-steps-card {
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.25);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.solve-steps-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.solve-steps-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.step-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.step-badge.step-current {
  background: var(--accent-cyan);
  color: #000000;
  transform: scale(1.1);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.6);
}

.step-badge.step-done {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
  opacity: 0.5;
}

.solve-steps-actions {
  display: flex;
  gap: 0.75rem;
}

/* ==========================================================================
   Métricas y Estadísticas WCA
   ========================================================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* ==========================================================================
   Panel de Configuración y Personalización
   ========================================================================== */

.settings-solves-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .settings-solves-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.panel-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0.5rem 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  outline: none;
  cursor: pointer;
}

.form-select:focus {
  border-color: var(--accent-primary);
}

.form-range {
  width: 100%;
  height: 6px;
  background: var(--bg-primary);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  accent-color: var(--accent-primary);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

/* Historial de Tiempos */
.solves-list-container {
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
}

.solves-list {
  list-style: none;
}

.solve-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.solve-item:last-child {
  border-bottom: none;
}

.solve-num {
  color: var(--text-muted);
  width: 40px;
}

.solve-time {
  font-weight: 700;
  color: var(--accent-cyan);
}

.solve-moves {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.solve-date {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.empty-solves {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Modales canónicos (Cero alertas)
   ========================================================================== */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal.modal-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transform: scale(0.95);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal.modal-open .modal-content {
  transform: scale(1);
}

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

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.btn-close-modal:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.victory-badge {
  text-align: center;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
}

.victory-time {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent-success);
  line-height: 1.1;
}

.victory-stats-row {
  display: flex;
  justify-content: space-around;
  margin-top: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.guide-table th, .guide-table td {
  padding: 0.5rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.guide-table th {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.guide-notation-key {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--accent-cyan);
}

/* Toast de notificación rápida */
.rubik-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(18, 20, 26, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-focus);
  color: var(--text-primary);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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