:root {
  color-scheme: light dark;
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #182033;
  --muted: #667085;
  --border: #d9deea;
  --accent: #2563eb;
  --accent-2: #14b8a6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #111c33;
    --text: #edf2ff;
    --muted: #a6b0c3;
    --border: #25314a;
    --accent: #60a5fa;
    --accent-2: #2dd4bf;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 32rem),
    var(--bg);
  color: var(--text);
}

.page {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.18);
}

.links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.links a, .button {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

h1 {
  font-size: clamp(2.3rem, 7vw, 4.8rem);
  line-height: 0.95;
  margin: 0 0 18px;
  letter-spacing: -0.06em;
}

h2 {
  margin-top: 0;
  font-size: 1.65rem;
}

h3 { margin-bottom: 8px; }

p.lede {
  font-size: 1.2rem;
  color: var(--muted);
}

ul { padding-left: 1.3rem; }

.badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 22px 0;
}

.badge {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--muted);
  font-size: 0.94rem;
}

.notice {
  border-left: 4px solid var(--accent-2);
  padding: 12px 16px;
  background: color-mix(in srgb, var(--accent-2) 12%, var(--card));
  border-radius: 14px;
}

.mock-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  min-height: 280px;
}

.column {
  border-radius: 18px;
  background: color-mix(in srgb, var(--accent) 9%, var(--card));
  border: 1px solid var(--border);
  padding: 12px;
}

.column strong { display: block; margin-bottom: 10px; }

.task {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 10px;
  font-size: 0.92rem;
  color: var(--muted);
}

footer {
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

code {
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 6px;
}

@media (max-width: 760px) {
  nav, .hero { grid-template-columns: 1fr; }
  nav { align-items: flex-start; }
  .hero { display: block; }
  .hero .card + .card { margin-top: 18px; }
  .mock-board { grid-template-columns: 1fr; }
}