/* Minimal, readable, Jekyll-inspired typography with CSS variables */
:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --card: #f6f6f6;
  --accent: #3a7bd5;
  --border: #e6e6e6;
}

:root[data-theme="dark"] {
  --bg: #0e0f12;
  --text: #ECEDEE;
  --muted: #A0A4AE;
  --card: #17191f;
  --accent: #8ab4f8;
  --border: #23262d;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  line-height: 1.6;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size: 0.95em; }

.container { max-width: 920px; margin: 0 auto; padding: 0 1rem; }
.section { padding: 3rem 0; }
.section-header { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem 0; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; backdrop-filter: blur(8px);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  z-index: 10;
}
.brand-title { font-weight: 700; font-size: 1.25rem; color: var(--text); }
.brand-subtitle { color: var(--muted); font-size: 0.9rem; display: block; }

.nav { display: flex; align-items: center; gap: 0.75rem; }
.nav-menu { display: flex; gap: 0.75rem; list-style: none; margin: 0; padding: 0; }
.nav-toggle { display: none; border: 1px solid var(--border); background: var(--card); padding: 0.5rem; border-radius: 0.5rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; }

@media (max-width: 640px) {
  .nav-toggle { display: inline-block; }
  .nav-menu {
    position: absolute; right: 1rem; top: 60px; background: var(--card);
    border: 1px solid var(--border); border-radius: 0.75rem; padding: 0.5rem;
    display: none; flex-direction: column; min-width: 180px;
  }
  .nav-menu.open { display: flex; }
}

.hero { padding: 3rem 0; }
.hero-text h1 { font-size: clamp(2rem, 4vw, 3rem); margin: 0 0 0.5rem 0; }
.hero-actions { display: flex; gap: 0.75rem; margin-top: 1rem; }

.feature-list { padding-left: 1.2rem; }
.feature-list li { margin: 0.25rem 0; }

.button {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.6rem 0.9rem; border-radius: 0.6rem;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
}
.button.primary {
  background: var(--accent); color: white; border-color: color-mix(in oklab, var(--accent), black 8%);
}
.button:hover { filter: brightness(0.98); }

.input {
  padding: 0.6rem 0.7rem; border-radius: 0.55rem; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); min-width: 200px;
}

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 0.9rem; padding: 1rem;
  display: flex; flex-direction: column; gap: 0.4rem;
}
.card .meta { color: var(--muted); font-size: 0.9rem; }

.post-list { list-style: none; padding: 0; margin: 1rem 0 0 0; }
.post-list li { padding: 1rem 0; border-bottom: 1px solid var(--border); }
.post-list li:last-child { border: 0; }

.site-footer {
  border-top: 1px solid var(--border); padding: 2rem 0; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.footer-links a { color: var(--muted); margin-left: 0.75rem; }

.theme-toggle { border: 1px solid var(--border); background: var(--card); border-radius: 0.5rem; padding: 0.4rem 0.6rem; }
.skip-link { position: absolute; left: -999px; top: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--accent); color: white; padding: 0.5rem 0.75rem; border-radius: 0.5rem; }

.contact-form { display: grid; gap: 0.6rem; max-width: 560px; }
.contact-form label { display: grid; gap: 0.25rem; }
.contact-form input, .contact-form textarea { width: 100%; }