:root {
  --bg: #F7F5F0;
  --fg: #0F0F0F;
  --accent: #E63946;
  --muted: #6B6B6B;
  --border: #E0DDD7;
  --surface: #FFFFFF;
  --on: #1A7F37;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}
.nav-logo { font-family: 'Instrument Serif', serif; font-size: 22px; font-weight: 400; letter-spacing: -0.02em; }
.nav-tagline { font-size: 13px; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

.hero {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 80px;
  align-items: center;
  padding: 100px 48px 80px;
  border-bottom: 1px solid var(--border);
}
.hero-label { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 24px; }
.hero-headline { font-family: 'Instrument Serif', serif; font-size: clamp(40px, 5vw, 60px); font-weight: 400; line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 28px; }
.hero-sub { font-size: 18px; color: var(--muted); line-height: 1.65; max-width: 480px; margin-bottom: 40px; }
.hero-cta-text { font-size: 13px; color: var(--muted); letter-spacing: 0.04em; }

.clock-widget { background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 28px; box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
.clock-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--border); }
.clock-row:last-child { border-bottom: none; }
.clock-row--ai { background: #0F0F0F; color: #F7F5F0; margin: 0 -28px; padding: 14px 28px; border-bottom: none; }
.clock-city { display: flex; flex-direction: column; }
.city-name { font-size: 15px; font-weight: 500; }
.city-time { font-size: 12px; color: var(--muted); margin-top: 2px; }
.clock-row--ai .city-time { color: #888; }
.clock-status { font-size: 11px; letter-spacing: 0.08em; font-weight: 600; padding: 4px 10px; border-radius: 2px; }
.clock-status.on { background: #E8F5E9; color: var(--on); }
.clock-row--ai .clock-status.on { background: #1A7F37; color: #fff; }

.howitworks { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.section-label { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 48px; }
.hiw-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.hiw-step { display: flex; flex-direction: column; gap: 12px; }
.hiw-num { font-family: 'Instrument Serif', serif; font-size: 40px; color: var(--border); line-height: 1; }
.hiw-step h3 { font-size: 16px; font-weight: 600; }
.hiw-step p { font-size: 14px; color: var(--muted); line-height: 1.6; }

.features { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); }
.feature-item { display: flex; gap: 20px; padding: 32px 40px 32px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.feature-item:nth-child(odd) { padding-right: 40px; border-right: 1px solid var(--border); }
.feature-item:nth-child(even) { padding-left: 40px; }
.feature-item:nth-last-child(-n+2) { border-bottom: none; }
.feature-icon { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.feature-body h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.feature-body p { font-size: 14px; color: var(--muted); line-height: 1.6; }

.difference { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.diff-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.diff-headline { font-family: 'Instrument Serif', serif; font-size: 36px; font-weight: 400; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 24px; }
.diff-sub { font-size: 15px; color: var(--muted); line-height: 1.7; margin-bottom: 16px; }

.diff-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.diff-row { display: grid; grid-template-columns: 170px repeat(4, 1fr); border-bottom: 1px solid var(--border); }
.diff-row:last-child { border-bottom: none; }
.diff-row--header { font-weight: 600; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 8px 0; }
.diff-row:not(.diff-row--header) span { padding: 10px 4px; }
.diff-row:not(.diff-row--header) span:first-child { color: var(--muted); }
.diff-check { color: var(--on); font-weight: 600; }
.diff-cross { color: #ccc; }
.diff-partial { color: #D97706; }

.closing { padding: 100px 48px; border-bottom: 1px solid var(--border); }
.closing-headline { font-family: 'Instrument Serif', serif; font-size: clamp(32px, 4vw, 50px); font-weight: 400; line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 28px; }
.closing-body { font-size: 17px; color: var(--muted); line-height: 1.75; margin-bottom: 20px; }
.closing-body:last-child { margin-bottom: 0; }

.footer { padding: 32px 48px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.footer-logo { font-family: 'Instrument Serif', serif; font-size: 18px; }
.footer-desc { font-size: 13px; color: var(--muted); margin-top: 4px; }
.footer-note { font-size: 12px; color: var(--muted); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 60px 24px; }
  .nav { padding: 16px 24px; }
  .hiw-grid { grid-template-columns: repeat(2, 1fr); }
  .diff-grid { grid-template-columns: 1fr; gap: 48px; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-item { border-right: none !important; padding-left: 0 !important; padding-right: 0 !important; }
  .howitworks, .features, .difference, .closing { padding: 60px 24px; }
  .footer { padding: 24px; }
  .footer-inner { flex-direction: column; gap: 12px; align-items: flex-start; }
}
@media (max-width: 480px) { .hiw-grid { grid-template-columns: 1fr; } }