:root {
  --bg: #0a0a0a;
  --fg: #e8e4df;
  --fg-muted: #8a8580;
  --accent: #c9a96e;
  --accent-dim: rgba(201, 169, 110, 0.12);
  --card-bg: #111110;
  --card-border: #1e1d1b;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Hero ── */
.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.hero-label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 2.5rem;
}

.os-tag {
  color: var(--accent);
  margin-left: 0.15em;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.8rem;
}

.accent-text {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 540px;
  line-height: 1.7;
}

.hero-line {
  width: 60px;
  height: 1px;
  background: var(--accent);
  margin-top: 4rem;
}

/* ── Section headers ── */
.section-header {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  margin-bottom: 3rem;
}

.section-num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.section-header h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  letter-spacing: -0.01em;
}

/* ── Capabilities ── */
.capabilities {
  padding: 6rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.cap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.cap-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 2.2rem 2rem;
  border-radius: 2px;
  transition: border-color 0.3s ease;
}

.cap-card:hover {
  border-color: var(--accent);
}

.cap-icon {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.cap-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.7rem;
  letter-spacing: 0.01em;
}

.cap-card p {
  color: var(--fg-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ── Rhythm / How it works ── */
.rhythm {
  padding: 6rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.rhythm-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.rhythm-step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 2rem 0;
}

.step-marker {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  color: var(--accent);
  flex-shrink: 0;
  border-radius: 2px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 520px;
}

.rhythm-connector {
  width: 1px;
  height: 32px;
  background: var(--card-border);
  margin-left: 18px;
}

/* ── Closing ── */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.closing-eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.closing h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.closing-body {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto;
}

/* ── Footer ── */
.site-footer {
  padding: 4rem 2rem;
  border-top: 1px solid var(--card-border);
  max-width: 900px;
  margin: 0 auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.footer-note {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero {
    min-height: 70vh;
    padding: 4rem 1.5rem 3rem;
  }

  .cap-grid {
    grid-template-columns: 1fr;
  }

  .capabilities,
  .rhythm,
  .closing {
    padding: 4rem 1.5rem;
  }

  .rhythm-step {
    flex-direction: column;
    gap: 1rem;
  }

  .rhythm-connector {
    margin-left: 0;
    width: 32px;
    height: 1px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }

  .closing {
    padding: 5rem 1.5rem;
  }
}