:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --bg-card-header: #1a1a26;
  --border-color: #2a2a3a;
  --text-primary: #e4e4eb;
  --text-muted: #8888a0;
  --accent: #6d5dfc;
  --accent-glow: rgba(109, 93, 252, 0.3);
  --accent-green: #00e89d;
  --accent-cyan: #00d4ff;
  --accent-pink: #ff6bca;
}

html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* Navbar */
.navbar-custom {
  background: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.navbar-custom .navbar-brand {
  background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* Cards */
.card-dark {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.card-dark .card-header {
  background: var(--bg-card-header);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.card-dark .card-body {
  padding: 1.25rem;
}

/* Year badge */
.year-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
}

.year-pill .arrow {
  color: var(--accent);
  font-weight: bold;
}

.badge-future {
  background: linear-gradient(135deg, var(--accent-pink), var(--accent)) !important;
  font-weight: 600;
}

.badge-historical {
  background: linear-gradient(135deg, #3a3a5a, #5a5a7a) !important;
  font-weight: 600;
}

/* Price display */
.price-display {
  color: var(--accent-green);
  font-weight: 800;
  font-family: 'Courier New', monospace;
}

.symbol-display {
  color: var(--text-primary);
  font-weight: 700;
}

/* Search form */
.search-input {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 12px !important;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-glow) !important;
}

.search-input::placeholder {
  color: var(--text-muted) !important;
}

.btn-glow {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: 12px;
  transition: box-shadow 0.3s, transform 0.15s;
}

.btn-glow:hover {
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
  color: #fff;
}

/* Hero title */
.hero-title {
  font-weight: 900;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Footer */
.footer-dark {
  border-top: 1px solid var(--border-color) !important;
  color: var(--text-muted);
  background: var(--bg-secondary);
}

/* Blinking cursor for AI typewriter effect */
.blinking-cursor {
  display: inline;
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
  font-weight: bold;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Fade-in animation for streaming items */
.fade-in {
  animation: fadeSlideIn 0.3s ease-out both;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* AI Content */
#ai-content {
  line-height: 1.8;
  font-size: 1.02rem;
  color: var(--text-primary);
}

#ai-content .quarter-heading {
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 1.05rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: 0.5px;
}

#ai-content .quarter-heading:first-child {
  margin-top: 0;
}

#ai-content ul {
  padding-left: 1.2rem;
  margin-bottom: 0.75rem;
}

#ai-content li {
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

#ai-content li::marker {
  color: var(--accent);
}

/* Loading spinner */
.spinner-glow {
  color: var(--accent) !important;
}

/* Alert overrides for dark */
.alert-dark-warn {
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.3);
  color: #ffc107;
  border-radius: 12px;
}

/* Back button */
.btn-ghost {
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  transition: all 0.2s;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: rgba(109, 93, 252, 0.08);
}

/* Source indicator badge (GitHub "Preview" pill style) */
.source-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid;
}

.source-live {
  color: #f87171;
  border-color: #f87171;
}

.source-cached {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

/* Chart canvas dark background */
#priceChart {
  border-radius: 8px;
}