:root {
  --maxw: 980px;
  --text: #111;
  --muted: #555;
  --border: #e6e6e6;
  --bg: #fff;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
  gap: 1rem;
}

.brand {
  font-weight: 650;
  text-decoration: none;
  color: var(--text);
}

.nav { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.nav-link {
  text-decoration: none;
  color: var(--muted);
  padding: 0.35rem 0.25rem;
}
.nav-link:hover { color: var(--text); }

.hero {
  padding: 3.25rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  margin: 0 0 0.75rem;
}
.hero p {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 60ch;
}
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  border: 1px solid var(--border);
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
}
.btn.primary {
  border-color: var(--text);
}
.social { display: flex; gap: 0.75rem; margin-top: 1rem; }
.social a { color: var(--muted); text-decoration: none; }
.social a:hover { color: var(--text); }

.section { padding: 1.25rem 0; }
.section h2 {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}
.col-7 { grid-column: span 7; }
.col-5 { grid-column: span 5; }
@media (max-width: 900px) {
  .col-7, .col-5 { grid-column: span 12; }
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
}
.card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }

.pills { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.65rem; }
.pill {
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}

.timeline { display: grid; gap: 0.9rem; }
.item {
  border-left: 2px solid var(--border);
  padding-left: 0.9rem;
}
.item .meta { color: var(--muted); font-size: 0.9rem; }

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
  padding: 1.25rem 0;
  color: var(--muted);
}