/* ===== CSS Variables ===== */
:root {
  --bg-deep: #050810;
  --bg-card: #0a0f1e;
  --bg-card-hover: #0f1628;
  --border: rgba(0, 200, 255, 0.12);
  --border-bright: rgba(0, 200, 255, 0.4);
  --accent-cyan: #00c8ff;
  --accent-magenta: #ff2d78;
  --accent-green: #00ff9d;
  --accent-yellow: #ffd700;
  --text-primary: #e8f4ff;
  --text-secondary: #7a9bb5;
  --text-muted: #3d5a72;
  --font-display: 'Orbitron', monospace;
  --font-body: 'Syne', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --glow-cyan: 0 0 20px rgba(0, 200, 255, 0.4), 0 0 60px rgba(0, 200, 255, 0.1);
  --glow-magenta: 0 0 20px rgba(255, 45, 120, 0.4), 0 0 60px rgba(255, 45, 120, 0.1);
  --glow-green: 0 0 20px rgba(0, 255, 157, 0.4);
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ===== Noise Overlay ===== */
.noise-overlay {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Scanlines ===== */
.scanlines {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 200, 255, 0.015) 2px,
    rgba(0, 200, 255, 0.015) 4px
  );
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

.header-inner {
  max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; gap: 2rem;
  height: 64px;
}

.logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  white-space: nowrap;
}

.logo-icon { color: var(--accent-cyan); font-size: 1.3rem; animation: pulse-glow 3s ease-in-out infinite; }
.logo-accent { color: var(--accent-cyan); }

@keyframes pulse-glow {
  0%, 100% { text-shadow: var(--glow-cyan); }
  50% { text-shadow: none; }
}

.nav-tabs {
  display: flex; gap: 0.25rem; flex: 1;
  overflow-x: auto; scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar { display: none; }

.nav-tab {
  background: none; border: 1px solid transparent;
  color: var(--text-secondary); font-family: var(--font-mono);
  font-size: 0.75rem; padding: 0.4rem 0.9rem;
  border-radius: 2px; cursor: pointer;
  transition: all 0.2s ease; white-space: nowrap;
}
.nav-tab:hover { color: var(--accent-cyan); border-color: var(--border); }
.nav-tab.active {
  color: var(--accent-cyan); border-color: var(--accent-cyan);
  background: rgba(0, 200, 255, 0.08);
  box-shadow: var(--glow-cyan);
}

.header-stats { white-space: nowrap; }
.stat-item { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
.stat-num { color: var(--accent-green); font-weight: 500; }

/* ===== Hero ===== */
.hero {
  position: relative; overflow: hidden;
  min-height: 480px;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 4rem;
  padding: 5rem 2rem 4rem;
  max-width: 1400px; margin: 0 auto;
}

.hero-bg-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0, 200, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 200, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.2em;
  color: var(--accent-green); border: 1px solid var(--accent-green);
  padding: 0.3rem 0.8rem; border-radius: 2px;
  margin-bottom: 1.5rem;
  box-shadow: var(--glow-green);
  animation: fadeInUp 0.6s ease forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
  opacity: 0; transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}
.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }
.title-line.accent { color: var(--accent-cyan); text-shadow: var(--glow-cyan); }

.hero-desc {
  color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7;
  margin-bottom: 2rem;
  opacity: 0; animation: fadeInUp 0.6s 0.4s ease forwards;
}

.hero-search {
  display: flex; align-items: center; gap: 0.75rem;
  background: rgba(0, 200, 255, 0.05);
  border: 1px solid var(--border-bright);
  border-radius: 4px; padding: 0.75rem 1rem;
  opacity: 0; animation: fadeInUp 0.6s 0.5s ease forwards;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.hero-search:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
}
.search-icon { color: var(--accent-cyan); font-size: 1.2rem; }
.hero-search input {
  background: none; border: none; outline: none;
  color: var(--text-primary); font-family: var(--font-mono);
  font-size: 0.85rem; width: 100%;
}
.hero-search input::placeholder { color: var(--text-muted); }

/* ===== Waveform ===== */
.hero-visual { position: relative; z-index: 2; }
.waveform-container {
  width: 100%; height: 200px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: rgba(0, 200, 255, 0.02);
  overflow: hidden;
}
#waveform-canvas { width: 100%; height: 100%; }

/* ===== Filter Bar ===== */
.filter-bar {
  background: rgba(10, 15, 30, 0.8);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 2rem;
  position: sticky; top: 64px; z-index: 90;
  backdrop-filter: blur(10px);
}

.filter-inner {
  max-width: 1400px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center;
}

.filter-group {
  display: flex; align-items: center; gap: 0.4rem;
}

.filter-label {
  font-family: var(--font-mono); font-size: 0.65rem;
  color: var(--text-muted); letter-spacing: 0.1em;
  margin-right: 0.25rem;
}

.filter-chip {
  background: none; border: 1px solid var(--border);
  color: var(--text-secondary); font-family: var(--font-mono);
  font-size: 0.7rem; padding: 0.25rem 0.6rem;
  border-radius: 2px; cursor: pointer;
  transition: all 0.15s ease;
}
.filter-chip:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
.filter-chip.active {
  background: rgba(0, 200, 255, 0.1);
  border-color: var(--accent-cyan); color: var(--accent-cyan);
}

/* ===== Main Content ===== */
.main-content {
  max-width: 1400px; margin: 0 auto;
  padding: 3rem 2rem;
}

/* ===== Section ===== */
.model-section {
  margin-bottom: 5rem;
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.model-section.visible { opacity: 1; transform: translateY(0); }
.model-section.hidden { display: none; }

.section-header { margin-bottom: 2rem; }

.section-title-wrap {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.section-icon {
  color: var(--accent-cyan); font-size: 1.2rem;
  text-shadow: var(--glow-cyan);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700;
  letter-spacing: 0.05em;
}

.section-count {
  background: rgba(0, 200, 255, 0.1);
  border: 1px solid var(--border-bright);
  color: var(--accent-cyan);
  font-family: var(--font-mono); font-size: 0.7rem;
  padding: 0.15rem 0.5rem; border-radius: 2px;
}

.section-desc {
  color: var(--text-muted); font-size: 0.85rem;
  font-family: var(--font-mono); letter-spacing: 0.05em;
  padding-left: 2rem;
}

/* ===== Model Grid ===== */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

/* ===== Model Card ===== */
.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  position: relative; overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  opacity: 0; transform: translateY(16px);
  animation: fadeInUp 0.5s ease forwards;
}

.model-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0; transition: opacity 0.2s;
}

.model-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 200, 255, 0.1), 0 0 0 1px rgba(0, 200, 255, 0.1);
  background: var(--bg-card-hover);
}
.model-card:hover::before { opacity: 1; }

/* Card accent colors by category */
.model-card[data-category="music"]::before {
  background: linear-gradient(90deg, transparent, var(--accent-magenta), transparent);
}
.model-card[data-category="music"]:hover {
  box-shadow: 0 8px 32px rgba(255, 45, 120, 0.1), 0 0 0 1px rgba(255, 45, 120, 0.1);
}
.model-card[data-category="any2audio"]::before {
  background: linear-gradient(90deg, transparent, var(--accent-green), transparent);
}
.model-card[data-category="restore"]::before {
  background: linear-gradient(90deg, transparent, var(--accent-yellow), transparent);
}

.card-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 0.75rem;
}

.card-name {
  font-family: var(--font-display);
  font-size: 0.95rem; font-weight: 700;
  color: var(--text-primary); line-height: 1.3;
}

.card-license {
  font-family: var(--font-mono); font-size: 0.6rem;
  padding: 0.2rem 0.5rem; border-radius: 2px;
  white-space: nowrap; flex-shrink: 0; margin-left: 0.5rem;
}
.license-apache { background: rgba(0, 200, 255, 0.1); color: var(--accent-cyan); border: 1px solid rgba(0, 200, 255, 0.2); }
.license-mit { background: rgba(0, 255, 157, 0.1); color: var(--accent-green); border: 1px solid rgba(0, 255, 157, 0.2); }
.license-other { background: rgba(255, 215, 0, 0.1); color: var(--accent-yellow); border: 1px solid rgba(255, 215, 0, 0.2); }

.card-desc {
  color: var(--text-secondary); font-size: 0.8rem; line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-bottom: 1rem;
}

.meta-tag {
  font-family: var(--font-mono); font-size: 0.65rem;
  padding: 0.2rem 0.5rem; border-radius: 2px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}
.meta-tag.highlight { color: var(--accent-cyan); border-color: rgba(0, 200, 255, 0.2); background: rgba(0, 200, 255, 0.05); }

.card-features {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
}

.feature-badge {
  font-family: var(--font-mono); font-size: 0.6rem;
  padding: 0.15rem 0.45rem; border-radius: 2px;
  display: flex; align-items: center; gap: 0.25rem;
}
.feature-yes { background: rgba(0, 255, 157, 0.08); color: var(--accent-green); border: 1px solid rgba(0, 255, 157, 0.15); }
.feature-no { background: rgba(255, 255, 255, 0.03); color: var(--text-muted); border: 1px solid rgba(255, 255, 255, 0.06); }

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

.card-date {
  font-family: var(--font-mono); font-size: 0.65rem;
  color: var(--text-muted);
}

.card-links { display: flex; gap: 0.5rem; }

.card-link {
  font-family: var(--font-mono); font-size: 0.65rem;
  color: var(--accent-cyan); text-decoration: none;
  border: 1px solid rgba(0, 200, 255, 0.2);
  padding: 0.2rem 0.5rem; border-radius: 2px;
  transition: all 0.15s ease;
}
.card-link:hover {
  background: rgba(0, 200, 255, 0.1);
  box-shadow: var(--glow-cyan);
}

/* Params badge */
.params-badge {
  position: absolute; top: 1rem; right: 1rem;
  font-family: var(--font-mono); font-size: 0.6rem;
  color: var(--text-muted);
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem; border-radius: 2px;
}

/* ===== Empty State ===== */
.empty-state {
  grid-column: 1 / -1;
  text-align: center; padding: 3rem;
  color: var(--text-muted);
  font-family: var(--font-mono); font-size: 0.85rem;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
}
.footer-inner { max-width: 1400px; margin: 0 auto; }
.footer-logo {
  font-family: var(--font-display); font-size: 1rem;
  color: var(--accent-cyan); margin-bottom: 0.75rem;
}
.footer-desc {
  color: var(--text-muted); font-size: 0.8rem; margin-bottom: 0.4rem;
}
.footer-desc a { color: var(--accent-cyan); text-decoration: none; }
.footer-desc a:hover { text-decoration: underline; }
.footer-note { color: var(--text-muted); font-size: 0.75rem; font-family: var(--font-mono); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding: 3rem 1.5rem 2rem; }
  .hero-visual { display: none; }
  .model-grid { grid-template-columns: 1fr; }
  .header-inner { gap: 1rem; }
  .header-stats { display: none; }
}

@media (max-width: 600px) {
  .nav-tabs { display: none; }
  .filter-inner { gap: 0.5rem; }
  .main-content { padding: 2rem 1rem; }
}