/* ===== CSS Custom Properties ===== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2128;
  --bg-hover: #292e36;

  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;

  --border-primary: #30363d;
  --border-secondary: #21262d;

  --accent-blue: #58a6ff;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-orange: #d29922;
  --accent-purple: #bc8cff;
  --accent-cyan: #39d2c0;

  --supply-color: #f8514966;
  --supply-border: #f85149;
  --demand-color: #3fb95066;
  --demand-border: #3fb950;
  --level-color: #58a6ff88;
  --entry-color: #d29922;
  --price-color: #e6edf3;

  --sidebar-width: 260px;
  --header-height: 60px;
  --card-min-width: 380px;
  --card-radius: 8px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===== Utilities ===== */
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ===== Header ===== */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  z-index: 100;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}
.sidebar-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.app-branding {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  line-height: 1.2;
}

.app-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.app-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* ===== Search ===== */
.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 6px 12px 6px 34px;
  font-size: 0.9rem;
  width: 240px;
  outline: none;
  transition: border-color var(--transition-fast), width var(--transition-normal);
}
.search-input:focus {
  border-color: var(--accent-blue);
  width: 320px;
}
.search-input::placeholder {
  color: var(--text-muted);
}

.search-kbd {
  position: absolute;
  right: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 3px;
  padding: 1px 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
  transition: opacity var(--transition-fast);
}
.search-input:focus + .search-kbd {
  opacity: 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-primary);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}
.btn:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
}

.btn-primary {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
}
.btn-primary:hover {
  background: #4090e0;
  border-color: #4090e0;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--bg-tertiary);
}

.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-lg { padding: 10px 24px; font-size: 1rem; }


/* ===== App Layout ===== */
.app-layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-primary);
  overflow-y: auto;
  padding: 16px 0;
  z-index: 50;
  transition: transform var(--transition-normal);
}

.sidebar-heading {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 16px;
  margin-bottom: 8px;
}

.sidebar-section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-secondary);
}

/* Category List */
.category-list {
  list-style: none;
}

.category-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}
.category-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.category-btn.active {
  color: var(--accent-blue);
  background: var(--bg-tertiary);
  border-left-color: var(--accent-blue);
}

.category-count {
  font-size: 0.75rem;
  background: var(--bg-tertiary);
  padding: 1px 8px;
  border-radius: 10px;
  color: var(--text-muted);
}
.category-btn.active .category-count {
  background: rgba(88,166,255,0.15);
  color: var(--accent-blue);
}

/* Filter Chips */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px;
}

.chip {
  padding: 4px 12px;
  border-radius: 16px;
  border: 1px solid var(--border-primary);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.chip:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}
.chip.active {
  background: rgba(88,166,255,0.15);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Legend */
.legend-list {
  list-style: none;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.legend-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.legend-swatch {
  width: 16px;
  height: 4px;
  border-radius: 2px;
}
.legend-price { background: var(--price-color); }
.legend-supply { background: var(--supply-border); }
.legend-demand { background: var(--demand-border); }
.legend-level { background: var(--accent-blue); }
.legend-entry { background: var(--entry-color); }

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 20px;
  min-width: 0;
}

.mobile-filters {
  display: none;
  margin-bottom: 16px;
}
.mobile-filters .filter-chips {
  padding: 0;
}

/* ===== Pattern Grid ===== */
.pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
  gap: 16px;
}

/* ===== Pattern Card ===== */
.pattern-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--card-radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.pattern-card:hover {
  border-color: var(--text-muted);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-secondary);
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
}

.card-badges {
  display: flex;
  gap: 6px;
  align-items: center;
}

.badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge-reversal {
  background: rgba(248,81,73,0.15);
  color: var(--accent-red);
}
.badge-continuation {
  background: rgba(63,185,80,0.15);
  color: var(--accent-green);
}
.badge-category {
  background: rgba(88,166,255,0.1);
  color: var(--accent-blue);
  text-transform: none;
  font-weight: 400;
}

/* Variant Tabs */
.variant-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-secondary);
}

.variant-tab {
  flex: 1;
  padding: 6px 0;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.variant-tab:hover {
  color: var(--text-secondary);
}
.variant-tab.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-blue);
}
.variant-tab.tab-bullish.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}
.variant-tab.tab-bearish.active {
  color: var(--accent-red);
  border-bottom-color: var(--accent-red);
}

/* SVG Container */
.card-svg-container {
  position: relative;
  padding: 8px 12px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-svg-container svg {
  width: 100%;
  height: auto;
  max-height: 220px;
}

.replay-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 5;
}
.card-svg-container:hover .replay-btn,
.replay-btn:focus {
  opacity: 1;
}
.replay-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* Card Description */
.card-description {
  padding: 10px 16px 14px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  border-top: 1px solid var(--border-secondary);
}

/* ===== Empty State ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Tooltip ===== */
.tooltip {
  position: fixed;
  z-index: 200;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 6px;
  padding: 8px 12px;
  max-width: 260px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.tooltip-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.tooltip-body {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar-toggle {
    display: block;
  }

  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0,0,0,0.5);
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-filters {
    display: block;
  }

  .app-subtitle {
    display: none;
  }

  .search-input {
    width: 160px;
  }
  .search-input:focus {
    width: 200px;
  }

  .pattern-grid {
    grid-template-columns: 1fr;
    --card-min-width: 100%;
  }
}

@media (max-width: 480px) {
  .app-header {
    padding: 0 12px;
    gap: 8px;
  }

  .app-title {
    font-size: 0.85rem;
  }

  .app-subtitle {
    display: none;
  }

  .search-input {
    width: 120px;
  }
  .search-input:focus {
    width: 160px;
  }

  .main-content {
    padding: 12px;
  }
}

/* Sidebar overlay backdrop for mobile */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 40;
}
.sidebar-backdrop.visible {
  display: block;
}