:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #161616;
  --fg: #f0f0f0;
  --fg-muted: #888888;
  --fg-dim: #555555;
  --accent: #00ff88;
  --accent-glow: rgba(0, 255, 136, 0.15);
  --accent-orange: #ff6b2b;
  --accent-red: #ff3b3b;
  --accent-blue: #3b8bff;
  --accent-purple: #a855f7;
  --border: #222222;
  --radius: 12px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 40px;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.logo-send { color: var(--fg); }
.logo-it { color: var(--accent); }
.logo-ai { color: var(--fg-muted); font-weight: 700; font-size: 0.9rem; margin-left: 4px; }

/* HERO */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 40px 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 40%, black 30%, transparent 70%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  background: rgba(0, 255, 136, 0.08);
  top: -100px;
  right: -100px;
}

.hero-glow-2 {
  width: 400px;
  height: 400px;
  background: rgba(255, 107, 43, 0.06);
  bottom: 0;
  left: -100px;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin-bottom: 60px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent);
  border: 1px solid rgba(0, 255, 136, 0.3);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 32px;
  background: rgba(0, 255, 136, 0.05);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero-line-1 {
  display: block;
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  color: var(--fg);
}

.hero-line-2 {
  display: block;
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  background: linear-gradient(135deg, var(--accent), var(--accent-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  background: var(--bg-elevated);
}

/* HERO MOCKUP */
.hero-visual {
  position: relative;
  width: 100%;
  max-width: 700px;
}

.hero-mockup {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.mockup-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fg-dim);
}

.mockup-dots span:first-child { background: var(--accent-red); }
.mockup-dots span:nth-child(2) { background: var(--accent-orange); }
.mockup-dots span:last-child { background: var(--accent); }

.mockup-title {
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-family: monospace;
}

.mockup-body {
  padding: 24px;
}

.mockup-timeline {
  margin-bottom: 20px;
}

.timeline-track {
  display: flex;
  gap: 3px;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 12px;
}

.timeline-segment {
  flex: 1;
  border-radius: 4px;
}

.seg-1 { background: linear-gradient(135deg, #1a3a2a, #0d2618); }
.seg-2 { background: linear-gradient(135deg, #3a2a1a, #261c0d); }
.seg-3 { background: linear-gradient(135deg, #1a2a3a, #0d1826); }
.seg-4 { background: linear-gradient(135deg, #2a1a3a, #1c0d26); }
.seg-5 { background: linear-gradient(135deg, #3a1a1a, #260d0d); }

.timeline-markers {
  position: relative;
  height: 28px;
}

.marker {
  position: absolute;
  top: 0;
  width: 2px;
  height: 16px;
  transform: translateX(-50%);
}

.marker::after {
  content: attr(data-label);
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.marker-trick { background: var(--accent); }
.marker-trick::after { color: var(--accent); }
.marker-speed { background: var(--accent-orange); }
.marker-speed::after { color: var(--accent-orange); }
.marker-scenic { background: var(--accent-blue); }
.marker-scenic::after { color: var(--accent-blue); }
.marker-bail { background: var(--accent-red); }
.marker-bail::after { color: var(--accent-red); }

.mockup-output {
  display: flex;
  gap: 12px;
}

.output-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.output-aspect {
  font-size: 0.65rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.output-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}

.output-duration {
  font-size: 0.75rem;
  color: var(--fg-dim);
  font-family: monospace;
}

/* HOW IT WORKS */
.how-it-works {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 48px;
  text-align: center;
}

.steps {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.step {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}

.step p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

.step-arrow {
  display: flex;
  align-items: center;
  padding-top: 48px;
  color: var(--fg-dim);
  font-size: 1.5rem;
}

.step-arrow::after {
  content: '\2192';
  color: var(--fg-dim);
}

/* FEATURES */
.features {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.3s;
}

.feature-card:hover {
  border-color: rgba(0, 255, 136, 0.2);
}

.feature-card-large {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(0,255,136,0.03), rgba(255,107,43,0.03));
  border-color: rgba(0, 255, 136, 0.15);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

/* FORMATS */
.formats {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
}

.formats-row {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.format-item {
  text-align: center;
}

.format-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
}

.format-vertical {
  width: 100px;
  height: 178px;
}

.format-wide {
  width: 178px;
  height: 100px;
}

.format-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 4px;
}

.format-detail {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* CLOSING */
.closing {
  padding: 120px 40px;
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.closing-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.closing-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0,255,136,0.06), transparent 70%);
  pointer-events: none;
}

.closing-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--fg);
}

.closing-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 540px;
  margin: 0 auto;
}

/* FOOTER */
.footer {
  padding: 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-top: 8px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav { padding: 16px 20px; }
  .hero { padding: 100px 20px 60px; }
  .hero-sub { font-size: 1rem; }
  .hero-tags { gap: 8px; }
  .tag { font-size: 0.65rem; padding: 5px 12px; }
  
  .how-it-works, .features, .formats, .closing { padding: 60px 20px; }
  
  .steps { flex-direction: column; }
  .step-arrow { display: none; }
  
  .features-grid { grid-template-columns: 1fr; }
  .feature-card-large { grid-column: 1; }
  
  .formats-row { gap: 20px; }
  .format-vertical { width: 80px; height: 142px; }
  .format-wide { width: 142px; height: 80px; }
  
  .mockup-output { flex-direction: column; gap: 8px; }
  
  .footer { padding: 30px 20px; }
}