:root {
  --bg: #0d0d0d;
  --fg: #f5f5f5;
  --accent: #ff5c2b;
  --accent-dim: rgba(255, 92, 43, 0.12);
  --muted: #888;
  --border: rgba(255,255,255,0.07);
  --card-bg: #141414;
  --font-head: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

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

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

/* NAV */
.nav { padding: 20px 40px; border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; gap: 16px; }
.nav-logo { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; color: var(--fg); }
.nav-tagline { font-size: 0.8rem; color: var(--muted); border-left: 1px solid var(--border); padding-left: 16px; }

/* HERO */
.hero {
  padding: 100px 40px 80px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero-content { max-width: 800px; }
.hero-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 28px;
  color: var(--fg);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 580px;
  margin-bottom: 48px;
  line-height: 1.7;
}
.hero-specs { display: flex; align-items: center; gap: 28px; }
.spec-item { display: flex; flex-direction: column; gap: 2px; }
.spec-val { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.spec-label { font-size: 0.78rem; color: var(--muted); }
.spec-divider { width: 1px; height: 40px; background: var(--border); }
.hero-bg-mark {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: 18vw;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.04);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

/* SECTION COMMONS */
.section-heading {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-sub { color: var(--muted); font-size: 0.95rem; margin-bottom: 48px; }

/* PROOF */
.proof { padding: 80px 40px; border-bottom: 1px solid var(--border); }
.proof-inner { max-width: 900px; }
.proof-heading { font-family: var(--font-head); font-size: 1rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 40px; }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); margin-bottom: 36px; }
.proof-card { background: var(--bg); padding: 36px 32px; }
.proof-stat { font-family: var(--font-head); font-size: 2.8rem; font-weight: 700; color: var(--accent); margin-bottom: 10px; }
.proof-label { font-size: 0.85rem; color: var(--muted); line-height: 1.5; }
.proof-context { font-size: 0.9rem; color: var(--muted); max-width: 560px; line-height: 1.7; }

/* FORMAT */
.format { padding: 80px 40px; border-bottom: 1px solid var(--border); background: var(--card-bg); }
.format-inner { max-width: 900px; }
.format-list { display: flex; flex-direction: column; gap: 0; }
.format-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.format-item:last-child { border-bottom: none; }
.format-icon { width: 44px; height: 44px; border-radius: 10px; background: var(--accent-dim); display: flex; align-items: center; justify-content: center; color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.format-name { font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; margin-bottom: 6px; }
.format-desc { font-size: 0.9rem; color: var(--muted); line-height: 1.6; }

/* STACK */
.stack { padding: 80px 40px; border-bottom: 1px solid var(--border); }
.stack-inner { max-width: 900px; }
.stack-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1px; background: var(--border); margin-bottom: 28px; }
.stack-card { background: var(--card-bg); padding: 28px 24px; }
.stack-name { font-family: var(--font-head); font-weight: 600; font-size: 0.95rem; margin-bottom: 8px; color: var(--accent); }
.stack-desc { font-size: 0.85rem; color: var(--muted); line-height: 1.5; }
.stack-result { font-size: 0.85rem; color: var(--muted); font-style: italic; }

/* CLOSING */
.closing { padding: 100px 40px; background: var(--card-bg); }
.closing-inner { max-width: 760px; }
.closing-mark { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); font-weight: 600; margin-bottom: 24px; }
.closing-headline { font-family: var(--font-head); font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; line-height: 1.2; margin-bottom: 20px; }
.closing-sub { font-size: 0.95rem; color: var(--muted); line-height: 1.7; max-width: 520px; }

/* FOOTER */
.footer { padding: 40px; border-top: 1px solid var(--border); }
.footer-inner { display: flex; flex-direction: column; gap: 6px; }
.footer-brand { font-family: var(--font-head); font-weight: 700; font-size: 1.1rem; }
.footer-meta { font-size: 0.8rem; color: var(--muted); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .nav-tagline { display: none; }
  .hero { padding: 64px 24px 56px; }
  .hero-headline { font-size: 2rem; }
  .hero-sub { font-size: 0.95rem; }
  .hero-specs { flex-wrap: wrap; gap: 20px; }
  .hero-bg-mark { display: none; }
  .proof, .format, .stack, .closing { padding: 56px 24px; }
  .proof-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .format-item { gap: 14px; }
  .section-sub { margin-bottom: 32px; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .hero-specs { flex-direction: column; align-items: flex-start; }
  .spec-divider { display: none; }
}