/* ============================================
   TrackSplit Landing Page
   Dark studio-console aesthetic
   ============================================ */

:root {
  --bg-deep: #06060c;
  --bg-dark: #0a0a14;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #555570;

  --accent: #2bb2a8;
  --accent-glow: rgba(43, 178, 168, 0.18);
  --accent-soft: #4ecdc4;

  --font-display: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-display);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--text-primary); }

img { display: block; max-width: 100%; }

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(6, 6, 12, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }

.nav-gh {
  display: flex;
  align-items: center;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.nav-gh:hover { opacity: 1; }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: glow-pulse 6s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
  0% { opacity: 0.4; transform: translateX(-50%) scale(1); }
  100% { opacity: 0.7; transform: translateX(-50%) scale(1.1); }
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  animation: fade-up 0.8s ease-out both;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
}

.hero-title-track { color: var(--text-primary); }
.hero-title-split { color: var(--accent); }

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 100px;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #04181a;
  box-shadow: 0 0 30px var(--accent-glow), 0 4px 12px rgba(0,0,0,0.3);
}
.btn-primary:hover {
  background: var(--accent-soft);
  color: #04181a;
  box-shadow: 0 0 50px rgba(43, 178, 168, 0.3), 0 6px 20px rgba(0,0,0,0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn-outline:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Hero posters strip */
.hero-posters {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 1.25rem;
  margin-top: 4rem;
  animation: fade-up 1s ease-out 0.3s both;
}

.hero-poster {
  flex-shrink: 0;
  width: 180px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s;
  animation: poster-rise 0.7s ease-out calc(var(--delay, 0s) + 0.5s) both;
}

@keyframes poster-rise {
  from { opacity: 0; transform: translateY(40px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.hero-poster:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.1), 0 0 40px var(--accent-glow);
}

.hero-poster img { width: 100%; height: auto; }

/* ---- Sections ---- */
section { padding: 7rem 2rem; }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 4rem;
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.section-desc strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---- Features ---- */
.features {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
    rgba(43, 178, 168, 0.08) 0%,
    transparent 50%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: rgba(43, 178, 168, 0.1);
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---- Gallery ---- */
.gallery { background: var(--bg-deep); }

.gallery-row {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.gallery-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.gallery-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.gallery-items {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  padding-bottom: 0.5rem;
}

.gallery-item {
  flex-shrink: 0;
  width: 220px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.04);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s;
  transform-style: preserve-3d;
  will-change: transform;
}

.gallery-item:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.08), 0 0 30px var(--accent-glow);
}

.gallery-item img { width: 100%; height: auto; }

.hero-poster { transform-style: preserve-3d; will-change: transform; }

/* ---- Workflow ---- */
.workflow {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.workflow-steps {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.workflow-step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  width: 100%;
}

.step-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(43, 178, 168, 0.12);
  border: 1px solid rgba(43, 178, 168, 0.25);
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s;
}

.step-content { flex: 1; padding-bottom: 0.5rem; }

.step-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.step-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.step-content code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-soft);
  background: rgba(43, 178, 168, 0.08);
  border: 1px solid rgba(43, 178, 168, 0.14);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  overflow-x: auto;
}

.workflow-connector {
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(to bottom, var(--border-hover), transparent);
  margin-left: 22px;
}

/* ---- Install ---- */
.install { background: var(--bg-deep); }

.install-content {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.install-block h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.install-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.install-block li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  position: relative;
}

.install-block li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.install-block li a { font-weight: 500; }

.code-block {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.copy-btn {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  transition: all 0.2s;
}
.copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.code-block pre { padding: 1rem; overflow-x: auto; }

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-soft);
}

.install-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ---- Related projects ---- */
.related {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.related-card {
  max-width: 640px;
  margin: 0 auto;
  padding: 2.25rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s;
}

.related-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.related-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.related-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.related-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ---- Footer ---- */
.footer {
  padding: 3rem 2rem 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.footer-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.footer-links { display: flex; gap: 2rem; }

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.footer-links a:hover { color: var(--text-primary); }

.footer-disclaimer {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-disclaimer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-disclaimer a { color: var(--text-secondary); }

/* ---- Scroll reveal animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.stagger.visible {
  opacity: 1;
  transform: translateY(0);
}

.nav-scrolled {
  background: rgba(6, 6, 12, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.step-pop {
  animation: number-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes number-pop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

.hero-desc { min-height: 1.6em; }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav { padding: 0.75rem 1.25rem; }
  .nav-links a:not(.nav-gh) { display: none; }

  .hero { padding: 7rem 1.25rem 3rem; }
  .hero-posters {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2.5rem;
  }
  .hero-poster { width: 130px; }

  section { padding: 4rem 1.25rem; }

  .feature-grid { grid-template-columns: 1fr; gap: 1rem; }

  .gallery-item { width: 160px; }

  .workflow-step { gap: 1rem; }
  .step-number { width: 36px; height: 36px; font-size: 0.95rem; }
  .workflow-connector { margin-left: 18px; }

  .footer-content { flex-direction: column; gap: 1.5rem; }
  .footer-links { flex-direction: column; gap: 0.75rem; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 3rem; }
  .hero-poster { width: 100px; }
  .gallery-item { width: 140px; }
}