/* ============================================
   GitHub Trending Archive — Digital Archaeology
   Editorial + Tech Noir Aesthetic
   ============================================ */

:root {
  /* Color Palette - Warm Light with Amber Accents */
  --bg-primary: #faf8f5;
  --bg-secondary: #f4f1ec;
  --bg-card: #ffffff;
  --bg-card-hover: #fef9f4;

  --text-primary: #2d2a26;
  --text-secondary: #6b6560;
  --text-muted: #9c9690;

  --accent-primary: #d97706;
  --accent-secondary: #f59e0b;
  --accent-glow: rgba(217, 119, 6, 0.15);

  --border-subtle: rgba(45, 42, 38, 0.08);
  --border-accent: rgba(217, 119, 6, 0.3);

  /* Warm gradient for header */
  --gradient-warm: linear-gradient(135deg, #fef9f4 0%, #f4f1ec 100%);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: #ffffff;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

::-webkit-scrollbar-thumb:active {
  background: var(--accent-primary);
}

/* Noise & Grain Overlays - Disabled for better readability */
/*
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.015;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.grain-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
  opacity: 0.25;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)'/%3E%3C/svg%3E");
}
*/

/* ============================================
   Header
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--gradient-warm);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-lg);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.brand-icon {
  font-size: 2.5rem;
  color: var(--accent-primary);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    text-shadow: 0 0 10px var(--accent-glow);
    opacity: 1;
  }
  50% {
    text-shadow: 0 0 25px var(--accent-glow), 0 0 40px var(--accent-glow);
    opacity: 0.9;
  }
}

.brand-text h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 2px;
}

.data-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  color: var(--accent-primary);
  border-radius: 2px;
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ============================================
   Filter Section
   ============================================ */
.filter-section {
  margin-bottom: var(--space-2xl);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

/* Type Toggle */
.type-toggle {
  display: flex;
  gap: 0;
  background: var(--bg-card);
  border-radius: 4px;
  padding: 4px;
  border: 1px solid var(--border-subtle);
}

.type-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 3px;
  transition: all var(--transition-base);
}

.type-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.type-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.type-icon {
  font-size: 0.9rem;
}

.type-label {
  letter-spacing: 0.05em;
}

/* Filter Controls */
.filter-controls {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.select-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.select-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

.custom-select {
  position: relative;
}

.custom-select select {
  appearance: none;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: var(--space-sm) var(--space-xl) var(--space-sm) var(--space-md);
  border-radius: 4px;
  cursor: pointer;
  min-width: 160px;
  transition: all var(--transition-base);
}

.custom-select select:hover {
  border-color: var(--text-muted);
}

.custom-select select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px var(--accent-glow), 0 0 0 3px var(--accent-glow);
}

.select-arrow {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.6rem;
  pointer-events: none;
}

/* Date Picker Wrapper */
.date-picker-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.date-cascade {
  display: flex;
  gap: var(--space-sm);
}

.date-cascade .custom-select select {
  min-width: 100px;
  padding: 8px 32px 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.date-cascade .year-select select {
  min-width: 100px;
}

.date-cascade .month-select select {
  min-width: 85px;
}

.date-cascade .day-select select {
  min-width: 80px;
}

.date-cascade .custom-select select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--bg-secondary);
}

.date-cascade .custom-select select:hover:not(:disabled) {
  border-color: var(--accent-primary);
}

.date-cascade .custom-select select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.date-cascade .select-arrow {
  font-size: 0.55rem;
}

/* Search Row */
.search-row {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.search-wrapper {
  position: relative;
  flex: 1;
  max-width: 500px;
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.search-wrapper input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-xl) var(--space-sm) var(--space-2xl);
  border-radius: 4px;
  transition: all var(--transition-base);
}

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

.search-wrapper input:hover {
  border-color: var(--text-muted);
}

.search-wrapper input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px var(--accent-glow), 0 0 0 3px var(--accent-glow);
}

.search-clear {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-xs);
  font-size: 0.8rem;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.search-wrapper:hover .search-clear.visible,
.search-wrapper input:focus ~ .search-clear.visible {
  opacity: 1;
}

.search-clear:hover {
  color: var(--accent-primary);
}

.results-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.results-count #resultsCount {
  color: var(--accent-primary);
  font-weight: 600;
}

/* ============================================
   Trending Section
   ============================================ */
.trending-section {
  margin-bottom: var(--space-3xl);
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.section-title-group {
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: var(--space-xs);
}

.section-decoration {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.deco-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(
    to right,
    var(--border-subtle),
    transparent
  );
}

.deco-line:last-child {
  background: linear-gradient(
    to left,
    var(--border-subtle),
    transparent
  );
}

.deco-diamond {
  color: var(--accent-primary);
  font-size: 0.6rem;
  opacity: 0.6;
}

/* ============================================
   Trending List
   ============================================ */
.trending-list {
  display: grid;
  gap: var(--space-sm);
}

/* Trending Item */
.trending-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(10px);
  animation: fade-in-up 0.4s ease forwards;
}

.trending-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateX(4px);
  box-shadow: -3px 0 0 var(--accent-primary);
}

@keyframes fade-in-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.trending-rank {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 2rem;
  text-align: right;
}

.trending-item:nth-child(1) .trending-rank { color: #ffd700; }
.trending-item:nth-child(2) .trending-rank { color: #c0c0c0; }
.trending-item:nth-child(3) .trending-rank { color: #cd7f32; }

.trending-info {
  min-width: 0;
}

.trending-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition-fast);
}

.trending-item:hover .trending-name {
  color: var(--accent-primary);
}

.trending-language {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.trending-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.trending-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.trending-meta-icon {
  font-size: 0.8rem;
}

/* ============================================
   Loading & Empty States
   ============================================ */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  color: var(--text-muted);
  gap: var(--space-lg);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  color: var(--text-muted);
  gap: var(--space-md);
}

.empty-icon {
  font-size: 3rem;
  opacity: 0.3;
}

.empty-state p {
  font-family: var(--font-body);
  font-size: 1rem;
  font-style: italic;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  margin-top: var(--space-3xl);
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--border-subtle);
  background: var(--gradient-warm);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.footer-time {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .filter-row {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-controls {
    flex-direction: column;
  }

  .custom-select select {
    width: 100%;
    min-width: unset;
  }

  .search-row {
    flex-direction: column;
    align-items: stretch;
  }

  .search-wrapper {
    max-width: none;
  }

  .results-count {
    text-align: center;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .section-decoration {
    width: 100%;
  }

  .trending-item {
    grid-template-columns: auto 1fr;
    gap: var(--space-md);
  }

  .trending-meta {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .type-btn {
    padding: var(--space-sm) var(--space-md);
  }

  .type-label {
    display: none;
  }
}

/* ============================================
   Trending Description & Stars
   ============================================ */
.trending-description {
  color: #57606a;
  font-size: 13px;
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.today-stars {
  color: #1a7f37;
  font-weight: 500;
}

.trending-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.trending-meta-item {
  color: #57606a;
  font-size: 12px;
}