:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1a1d29;
  --muted: #5b6172;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --border: #e6e8ef;
  --border-hover: #c7d6fb;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04),
    0 8px 24px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 2px 4px rgba(16, 24, 40, 0.06),
    0 16px 40px rgba(37, 99, 235, 0.14);
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --surface: #181b24;
    --text: #e8eaf2;
    --muted: #9aa1b5;
    --accent: #6d9aff;
    --accent-soft: #17223c;
    --border: #262b3a;
    --border-hover: #3a4a75;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.35),
      0 16px 40px rgba(109, 154, 255, 0.16);
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.center {
  text-align: center;
}

.wrap {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 72px 0 40px;
  background: radial-gradient(
    120% 100% at 50% 0%,
    var(--accent-soft) 0%,
    var(--bg) 60%
  );
}

.logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 2.75rem);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 auto;
  max-width: 540px;
  color: var(--muted);
  font-size: 1.075rem;
}

/* Grid */
.grid {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card {
  display: flex;
}

.card-link {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 0.16s ease, box-shadow 0.16s ease,
    border-color 0.16s ease;
}

.card-link:hover,
.card-link:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.card-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .card-link {
    transition: none;
  }

  .card-link:hover,
  .card-link:focus-visible {
    transform: none;
  }
}

.card-emoji {
  font-size: 1.9rem;
  line-height: 1;
  margin-bottom: 14px;
}

.card-title {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.card-kicker {
  margin: 2px 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-desc {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.95rem;
  flex: 1;
}

.card-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
}

/* Footer */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  padding: 48px 20px 56px;
}

.site-footer p {
  margin: 0;
}