/* Twistora — Main Layout, Variables, and Base Styles */

:root {
  --bg-primary: #0f1115;
  --bg-secondary: #171a21;
  --bg-tertiary: #1f242e;
  --bg-card: #181c24;
  --bg-card-hover: #212631;
  --bg-cube-viewport: #111419;
  --bg-brand: #13223d;

  --border-subtle: #2b3240;
  --border-focus: #3b82f6;

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --timer-idle: #e5e7eb;
  --timer-holding: #f59e0b;
  --timer-ready: #10b981;
  --timer-running: #60a5fa;
  --timer-stopped: #f3f4f6;

  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-success: #10b981;
  --accent-danger: #ef4444;

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

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);

  --transition-fast: 150ms ease;
}

[data-theme="light"] {
  --bg-primary: #f6f8fb;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-cube-viewport: #f8fafc;
  --bg-brand: #152b4d;

  --border-subtle: #cbd5e1;
  --border-focus: #2563eb;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --timer-idle: #0f172a;
  --timer-holding: #d97706;
  --timer-ready: #059669;
  --timer-running: #2563eb;
  --timer-stopped: #0f172a;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  transition: all var(--transition-fast);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

a {
  color: inherit;
  text-decoration: none;
}

select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
}

/* App Structure */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem; /* Reduced horizontal padding */
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 50;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 2rem;
  height: 2rem;
  background: var(--bg-brand);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #e2e8f0;
  font-weight: 800;
  font-size: 0.875rem;
}

[data-theme="light"] .brand-icon {
  background: var(--bg-brand);
  color: #f8fafc;
}

.brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  text-transform: uppercase;
}

/* Nav */
.app-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background-color: var(--bg-tertiary);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.nav-tab-btn {
  padding: 0.25rem 0.5rem; /* Reduced padding */
  font-size: 0.75rem; /* Slightly smaller font */
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* On smaller screens, make nav scrollable if it overflows */
@media (max-width: 768px) {
  .app-nav {
    padding: 0.25rem 0; /* Reduce nav padding */
    overflow-x: auto; /* Enable horizontal scrolling */
    white-space: nowrap; /* Prevent buttons from wrapping */
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on touch devices */
    border: none; /* Remove border if it interferes with scrolling */
    background-color: transparent; /* Use background from header */
  }
  .nav-tab-btn {
    padding: 0.4rem 0.6rem; /* Slightly more padding for touch targets */
    font-size: 0.8rem;
  }
  .nav-tab-btn.active {
    background-color: var(--bg-card); /* Keep active button background */
  }
}

.nav-tab-btn:hover {
  color: var(--text-primary);
}

.nav-tab-btn.active {
  background-color: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

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

.action-btn {
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.action-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1rem; /* Reduced horizontal padding */
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  gap: 1.5rem;
}

.view-section {
  display: none;
}

.view-section.active {
  display: block;
}

/* Dual View Grid */
.dual-view-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.dual-view-grid.mode-timer-solo {
  grid-template-columns: 1fr;
}

.dual-view-grid.mode-timer-solo .cube-column {
  display: none !important;
}

.dual-view-grid.mode-cube-solo {
  grid-template-columns: 1fr;
}

.dual-view-grid.mode-cube-solo .timer-column {
  display: none !important;
}

.dual-view-grid.mode-cube-solo .cube-canvas-wrapper {
  height: 480px;
}

@media (max-width: 1024px) {
  .dual-view-grid {
    grid-template-columns: 1fr;
  }

  .main-content {
    padding-inline: 0.75rem;
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: 0.65rem 0.75rem;
    gap: 0.75rem;
  }

  .brand {
    min-width: 0;
  }

  .brand-badge {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .main-content {
    padding: 0.75rem;
    gap: 1rem;
  }

  .scramble-box {
    padding: 0.875rem 1rem;
    margin-bottom: 1rem;
  }

  .timer-container {
    padding: 1.5rem 0.875rem;
  }

  .timer-hint {
    flex-wrap: wrap;
    justify-content: center;
  }

  .timer-options {
    flex-direction: column;
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .app-header {
    align-items: flex-start;
  }

  .brand-title {
    font-size: 1rem;
  }

  .action-btn,
  .nav-tab-btn {
    min-height: 2.5rem;
  }

  .scramble-text {
    font-size: 0.95rem;
    letter-spacing: 0.05em;
  }

  .history-table th,
  .history-table td {
    padding-inline: 0.5rem;
  }
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

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

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Dashboard Bottom Grid */
.dashboard-bottom-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

@media (max-width: 900px) {
  .dashboard-bottom-grid {
    grid-template-columns: 1fr;
  }
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
}

.stat-card {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-value.pb {
  color: var(--accent-success);
}

/* Solve History Table */
.history-table-wrapper {
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-tertiary);
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8125rem;
}

.history-table th {
  position: sticky;
  top: 0;
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.history-table td {
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.history-table tr:hover {
  background-color: var(--bg-card-hover);
}

.history-index {
  color: var(--text-muted);
  font-weight: 600;
  width: 45px;
}

.history-time {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text-primary);
  white-space: nowrap;
}

.history-time.dnf {
  color: var(--accent-danger);
  text-decoration: line-through;
}

.history-penalty-btn-group {
  display: inline-flex;
  gap: 0.25rem;
}

.penalty-btn {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.penalty-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.penalty-btn.active-plus2 {
  background-color: rgba(245, 158, 11, 0.2);
  border-color: var(--timer-holding);
  color: var(--timer-holding);
}

.penalty-btn.active-dnf {
  background-color: rgba(239, 68, 68, 0.2);
  border-color: var(--accent-danger);
  color: var(--accent-danger);
}

.history-scramble-col {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  max-width: 250px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-actions-col {
  text-align: right;
  width: 45px;
}

.history-delete-btn {
  color: var(--text-muted);
  padding: 0.2rem 0.5rem;
  font-size: 1.1rem;
  line-height: 1;
}

.history-delete-btn:hover {
  color: var(--accent-danger);
}

.history-empty-state {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

/* Footer (Required exact credit & SVG icons) */
.app-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-credit {
  font-weight: 500;
}

.developer-name {
  color: var(--text-primary);
  font-weight: 600;
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-link svg {
  fill: currentColor;
  width: 1.125rem;
  height: 1.125rem;
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .app-footer {
    flex-direction: column;
    text-align: center;
  }
}