:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #5b6170;
  --border: #e3e5ea;
  --accent: #2f6bff;
  --accent-soft: #e8efff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --text: #eef0f4;
    --muted: #9aa1b0;
    --border: #262a33;
    --accent: #6b95ff;
    --accent-soft: #1c2640;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header,
.site-footer {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
}

.hero { padding: 56px 0 40px; }
.hero h1 { font-size: clamp(2rem, 6vw, 3rem); margin: 0 0 12px; letter-spacing: -0.02em; }
.hero p { margin: 0; color: var(--muted); font-size: 1.15rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding-bottom: 56px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}
.card h2 { font-size: 1.1rem; margin: 0 0 6px; }
.card p { margin: 0 0 14px; color: var(--muted); }

.tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.site-footer { color: var(--muted); font-size: 0.9rem; }
.site-footer p { margin: 0; }

.not-found { text-align: center; padding-top: 20vh; }
.not-found h1 { font-size: 4rem; margin: 0; }
.not-found p { color: var(--muted); }

.button {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}