:root {
  --bg: #07070e;
  --bg-surface: #0e0e1a;
  --bg-card: #13131f;
  --fg: #eeeef5;
  --fg-muted: #6e6e8a;
  --accent: #00e5a0;
  --accent-dim: rgba(0, 229, 160, 0.12);
  --danger: #ff4545;
  --font-head: 'Syne', sans-serif;
  --font-body: 'Figtree', sans-serif;
  --radius: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 40px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  background: rgba(7,7,14,0.85);
  backdrop-filter: blur(12px);
}
.nav-inner { max-width: 1100px; margin: 0 auto; }
.nav-logo {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--fg);
  text-transform: lowercase;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 120px 40px 80px;
  max-width: 1100px;
  margin: 0 auto;
}
.hero-text { }
.badge {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0,229,160,0.3);
  background: var(--accent-dim);
  padding: 5px 12px;
  border-radius: 4px;
  margin-bottom: 24px;
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(42px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.05;
  color: var(--fg);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-lede {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 460px;
  line-height: 1.65;
}
.hero-lede em { color: var(--fg); font-style: normal; font-weight: 500; }

.hero-visual { }
.file-list {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  overflow: hidden;
}
.file-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  position: relative;
}
.file-item:last-child { border-bottom: none; }
.file-item.file-fading { opacity: 0.45; }
.file-item.file-pending { opacity: 0.2; }
.file-bar {
  width: var(--w, 80%);
  height: 6px;
  background: var(--bg-surface);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.file-bar::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--fg-muted) 0%, var(--fg) 100%);
  border-radius: 3px;
}
.file-name {
  font-size: 13px;
  color: var(--fg-muted);
  font-family: 'Courier New', monospace;
  flex: 1;
}
.vanish-stamp {
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  opacity: 0.8;
}
.hero-caption {
  font-size: 12px;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 14px;
  opacity: 0.6;
}

/* How / Comparison */
.how {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-sub {
  font-size: 16px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: 60px;
}
.comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: start;
}
.comp-col { }
.comp-label {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.fail-label { color: var(--danger); }
.win-label { color: var(--accent); }
.comp-visual {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
}
.disk-icon {
  display: flex;
  align-items: center;
  gap: 12px;
}
.disk-label {
  font-family: 'Courier New', monospace;
  font-size: 12px;
  color: var(--fg-muted);
  flex-shrink: 0;
}
.disk-tracks {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
}
.track {
  height: 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
}
.track-used { background: rgba(255,255,255,0.12); }
.track-deleted { background: rgba(255, 69, 69, 0.25); border: 1px dashed rgba(255,69,69,0.4); }
.track-wiped { background: rgba(0,229,160,0.08); border: 1px solid rgba(0,229,160,0.2); }
.comp-note { font-size: 13px; color: var(--fg-muted); }
.comp-divider { display: flex; align-items: center; padding-top: 60px; }
.divider-arrow { font-size: 24px; color: var(--fg-muted); }

/* Standards */
.standards {
  padding: 80px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.standards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.std-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}
.std-badge {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,229,160,0.2);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}
.std-name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}
.std-desc { font-size: 14px; color: var(--fg-muted); line-height: 1.6; }

/* Features */
.features {
  padding: 80px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.features-header { margin-bottom: 48px; }
.features-list { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.feat-item { display: flex; gap: 20px; align-items: flex-start; }
.feat-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.feat-name {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 6px;
}
.feat-desc { font-size: 14px; color: var(--fg-muted); line-height: 1.6; }

/* Closing */
.closing {
  padding: 120px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.closing-inner { max-width: 640px; }
.closing-title {
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  color: var(--fg);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.closing-body {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}
.closing-closing {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 32px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--fg);
}
.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  font-family: var(--font-head);
  letter-spacing: 0.06em;
}

/* Responsive */
@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; padding: 100px 24px 60px; gap: 48px; }
  .how, .standards, .features, .closing { padding: 60px 24px; }
  .comparison { grid-template-columns: 1fr; gap: 24px; }
  .comp-divider { display: none; }
  .standards-grid, .features-list { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 8px; }
}