:root {
  color-scheme: light;
  --navy: #0f172a;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --soft: #f8fafc;
  --sky: #0284c7;
  --sky-dark: #0369a1;
  --wheat-soft: #fffaf0;
  --wheat-border: #eadcb6;
  --wheat: #b98a22;
  --wheat-text: #594113;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
}

a { color: var(--sky-dark); font-weight: 750; text-decoration: none; }
a:hover { text-decoration: underline; }

.shell { width: min(1040px, calc(100% - 32px)); margin: 0 auto; }

.top {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--navy); font-size: 18px; font-weight: 900; }
.brand img { width: 40px; height: 40px; border-radius: var(--radius); }
.nav-links { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; font-size: 14px; }
.app-link { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; border-radius: var(--radius); background: var(--sky); color: #fff; }

main { padding: 42px 0 56px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.75fr);
  gap: 32px;
  align-items: center;
}

.kicker {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 5px 10px;
  border: 1px solid var(--wheat-border);
  border-radius: 999px;
  background: var(--wheat-soft);
  color: var(--wheat-text);
  font-size: 13px;
  font-weight: 850;
}

h1 { margin: 0; color: #020617; font-size: clamp(34px, 5vw, 54px); line-height: 1.05; letter-spacing: 0; }
.lead { margin: 18px 0 0; color: #475569; font-size: 18px; line-height: 1.7; }

.hero-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.hero-card img { width: 100%; height: auto; display: block; }
.hero-card figcaption { padding: 12px 14px; color: var(--muted); font-size: 13px; }

.layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  margin-top: 38px;
}

.side {
  position: sticky;
  top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 14px;
}

.side strong { display: block; margin-bottom: 8px; color: var(--navy); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.side a { display: block; padding: 8px 0; border-top: 1px solid #f1f5f9; color: #334155; font-size: 14px; line-height: 1.35; }

.article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 30px;
}

.answer {
  margin: 0 0 24px;
  padding: 16px 18px;
  border: 1px solid #bae6fd;
  border-left: 3px solid var(--sky);
  border-radius: var(--radius);
  background: #f0f9ff;
  color: #334155;
  font-size: 16px;
}

h2 { margin: 32px 0 10px; color: #020617; font-size: 28px; line-height: 1.2; }
h3 { margin: 22px 0 8px; color: #0f172a; font-size: 20px; }
p { margin: 12px 0; color: #334155; }
ul, ol { color: #334155; padding-left: 22px; }
li { margin: 8px 0; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.tile { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; background: var(--soft); }
.tile strong { display: block; color: var(--navy); }
.tile span { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; line-height: 1.5; }

.note { margin-top: 18px; padding: 15px 16px; border: 1px solid var(--wheat-border); border-radius: var(--radius); background: var(--wheat-soft); color: var(--wheat-text); }
.related { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); }
.cta { margin-top: 30px; padding: 22px; border-radius: var(--radius); background: var(--navy); color: #fff; }
.cta p { color: #cbd5e1; }
.cta a { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; margin-top: 10px; padding: 0 16px; border-radius: var(--radius); background: var(--sky); color: #fff; }

.footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 14px; }

@media (max-width: 860px) {
  .hero, .layout, .grid { grid-template-columns: 1fr; }
  .side { position: static; }
  .article { padding: 22px; }
}