:root {
  --bg: #080808;
  --fg: #f0ede6;
  --fg-dim: #7a7670;
  --accent: #f0ede6;
  --border: #1e1e1e;
  --font-display: 'Syne', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.nav-brand-os {
  color: var(--fg-dim);
  font-weight: 400;
}

.nav-tag {
  font-size: 11px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* HERO */
.hero {
  padding: 80px 40px 60px;
  border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(80px, 15vw, 200px);
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
}

.hero-title-void {
  color: var(--fg);
  display: block;
}

.hero-title-os {
  color: var(--fg-dim);
  display: block;
  font-size: 0.45em;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  line-height: 1.8;
}

.hero-sub {
  font-size: 16px;
  color: var(--fg-dim);
  max-width: 540px;
  line-height: 1.7;
}

/* MISSION */
.mission {
  padding: 60px 40px;
  border-bottom: 1px solid var(--border);
}

.mission-label {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 20px;
}

.mission-text {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.5;
  max-width: 680px;
  color: var(--fg);
}

/* FEATURES */
.features {
  padding: 60px 40px;
  border-bottom: 1px solid var(--border);
}

.features-header {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.feature {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.feature-num {
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.feature h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature p {
  font-size: 13px;
  color: var(--fg-dim);
  line-height: 1.7;
}

/* PRINCIPLES */
.principles {
  padding: 60px 40px;
  border-bottom: 1px solid var(--border);
}

.principles-label {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 40px;
}

.principles-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.principle {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.principle-marker {
  width: 8px;
  height: 8px;
  background: var(--fg);
  flex-shrink: 0;
  margin-top: 6px;
}

.principle p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 580px;
}

/* CLOSING */
.closing {
  padding: 80px 40px;
  border-bottom: 1px solid var(--border);
}

.closing-label {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.closing-text {
  font-size: 16px;
  color: var(--fg-dim);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.closing-void {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg);
  max-width: 600px;
}

/* FOOTER */
.footer {
  padding: 40px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 10px;
}

.footer-brand-os {
  color: var(--fg-dim);
  font-weight: 400;
}

.footer-copy {
  font-size: 12px;
  color: var(--fg-dim);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 48px 24px 40px; }
  .mission { padding: 40px 24px; }
  .mission-text { font-size: 18px; }
  .features { padding: 40px 24px; }
  .features-grid { grid-template-columns: 1fr; gap: 0; }
  .principles { padding: 40px 24px; }
  .closing { padding: 60px 24px; }
  .footer { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 72px; }
}