:root {
  --bg: #0d1117;
  --bg-card: #111820;
  --bg-card-hover: #161e28;
  --text: #e8eaed;
  --text-muted: #8b949e;
  --text-faint: #3d444d;
  --accent: #f0a500;
  --accent-glow: #f5c040;
  --green: #3fb950;
  --blue: #58a6ff;
  --border: #21262d;
  --serif: 'DM Serif Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, 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(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ─── NAV ─────────────────────────────────────────── */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 2rem 3rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav__logo {
  font-family: var(--serif);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--text);
}
.nav__tagline {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ─── HERO ─────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 5rem 3rem 4rem;
  min-height: 88vh;
}
.hero__eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.hero__headline {
  font-family: var(--serif);
  font-size: clamp(3rem, 5.5vw, 5rem);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 1.8rem;
}
.hero__sub {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 44ch;
}

/* Dashboard illustration */
.hero__dashboard { position: relative; }
.dash {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 60px rgba(240,165,0,0.08);
}
.dash__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.dash__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}
.dash__label {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}
.dash__feed {
  padding: 0.75rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.feed__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.feed__item:last-child { border-bottom: none; }
.feed__item--active { background: rgba(63,185,80,0.06); margin: 0 -1.25rem; padding: 0.6rem 1.25rem; border-radius: 4px; }
.feed__item--queued { opacity: 0.55; }
.feed__icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feed__icon--check { background: rgba(63,185,80,0.15); border: 1px solid rgba(63,185,80,0.3); }
.feed__icon--check::after { content: ''; width: 8px; height: 5px; border-left: 1.5px solid var(--green); border-bottom: 1.5px solid var(--green); transform: rotate(-45deg) translateY(-1px); display: block; }
.feed__icon--spin { background: rgba(240,165,0,0.15); border: 1px solid rgba(240,165,0,0.3); animation: spin 1.5s linear infinite; }
.feed__icon--spin::after { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); display: block; }
.feed__icon--clock { background: rgba(139,148,158,0.1); border: 1px solid rgba(139,148,158,0.2); }
.feed__icon--clock::after { content: ''; width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid var(--text-muted); display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
.feed__text { font-size: 0.8rem; color: var(--text); flex: 1; }
.feed__time { font-size: 0.7rem; color: var(--text-faint); white-space: nowrap; }
.dash__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border);
}
.stat { padding: 1rem 1.25rem; text-align: center; }
.stat + .stat { border-left: 1px solid var(--border); }
.stat__num { font-size: 1.6rem; font-weight: 400; color: var(--accent); line-height: 1; margin-bottom: 0.3rem; }
.stat__label { font-size: 0.68rem; color: var(--text-muted); letter-spacing: 0.03em; }
.hero__caption {
  font-size: 0.7rem;
  color: var(--text-faint);
  font-style: italic;
  text-align: center;
  margin-top: 0.75rem;
}

/* ─── PROBLEM ─────────────────────────────────── */
.problem { padding: 6rem 3rem; border-top: 1px solid var(--border); }
.problem__inner { max-width: 820px; }
.problem__label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 2rem;
}
.problem__headline {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 3rem;
}
.problem__grid { display: grid; grid-template-columns: 1fr; gap: 0; }
.pblock { padding: 1.8rem 0; border-bottom: 1px solid var(--border); }
.pblock:last-child { border-bottom: none; }
.pblock__text { font-size: 1rem; color: var(--text-muted); line-height: 1.75; max-width: 68ch; }

/* ─── AGENT ─────────────────────────────────── */
.agent { padding: 6rem 3rem; background: var(--bg-card); }
.agent__inner { max-width: 840px; }
.agent__rule { width: 40px; height: 1px; background: var(--accent); margin-bottom: 2rem; }
.agent__label { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.5rem; }
.agent__headline {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 2rem;
}
.agent__body { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 3rem; }
.agent__body p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.8; max-width: 64ch; }
.agent__comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.compare { padding: 1.5rem; }
.compare--old { background: rgba(255,255,255,0.02); }
.compare--new { border-left: 1px solid var(--border); }
.compare__label { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 1rem; }
.compare__prose { font-size: 0.85rem; color: var(--text-muted); line-height: 1.75; }
.compare__item { font-size: 0.82rem; color: var(--text-muted); padding: 0.5rem 0; line-height: 1.5; }
.compare__item--done { color: var(--text); position: relative; padding-left: 1.5rem; }
.compare__item--done::before { content: ''; position: absolute; left: 0; top: 0.75rem; width: 8px; height: 5px; border-left: 1.5px solid var(--green); border-bottom: 1.5px solid var(--green); transform: rotate(-45deg); }
.compare__item:not(.compare__item--done) { opacity: 0.4; }

/* ─── WHAT ─────────────────────────────────── */
.what { padding: 6rem 3rem; border-top: 1px solid var(--border); }
.what__inner { max-width: 780px; }
.what__label { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 3rem; }
.what__blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.wblock { padding: 2.5rem 2.5rem 2.5rem 0; border-bottom: 1px solid var(--border); }
.wblock:nth-child(3), .wblock:nth-child(4) { border-bottom: none; }
.wblock:nth-child(even) { padding-left: 3rem; border-left: 1px solid var(--border); }
.wblock__title { font-family: var(--serif); font-size: 1.3rem; font-weight: 400; color: var(--text); margin-bottom: 0.8rem; }
.wblock__text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.75; }

/* ─── CLOSING ─────────────────────────────────── */
.closing { padding: 8rem 3rem 6rem; border-top: 1px solid var(--border); }
.closing__inner { max-width: 620px; }
.closing__rule { width: 40px; height: 1px; background: var(--accent); margin-bottom: 2.5rem; }
.closing__headline {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 1.5rem;
}
.closing__body { font-size: 0.95rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 1rem; }

/* ─── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 768px) {
  .nav { padding: 1.5rem 1.5rem 0; }
  .hero { grid-template-columns: 1fr; padding: 3rem 1.5rem; min-height: auto; gap: 2.5rem; }
  .hero__dashboard { order: -1; }
  .dash__stats { grid-template-columns: repeat(3, 1fr); }
  .stat { padding: 0.75rem 0.75rem; }
  .stat__num { font-size: 1.3rem; }
  .problem { padding: 4rem 1.5rem; }
  .agent { padding: 4rem 1.5rem; }
  .agent__comparison { grid-template-columns: 1fr; }
  .compare--new { border-left: none; border-top: 1px solid var(--border); }
  .what { padding: 4rem 1.5rem; }
  .what__blocks { grid-template-columns: 1fr; }
  .wblock { padding: 2rem 0; }
  .wblock:nth-child(even) { padding-left: 0; border-left: none; }
  .closing { padding: 5rem 1.5rem 4rem; }
}