/* assets/css/site.css */

/* ---------- Theme tokens ---------- */
:root {
  --bg: #0b0f14;
  --panel: #101826;
  --text: #e7edf7;
  --muted: #aab7cc;
  --border: rgba(231, 237, 247, 0.12);
  --link: #8ab4ff;
  --shadow: 0 10px 30px rgba(0,0,0,.35);

  --maxw: 980px;
  --radius: 14px;
  --pad: 18px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

/* Light theme */
:root[data-theme="light"] {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #152033;
  --muted: #4c5a73;
  --border: rgba(21, 32, 51, 0.12);
  --link: #1b5bd6;
  --shadow: 0 10px 30px rgba(21,32,51,.10);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(var(--maxw), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-weight: 700;
  letter-spacing: .2px;
}

.brand small { color: var(--muted); font-weight: 500; }

.navlinks {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
}

.navlinks a {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--text);
  opacity: .92;
}

.navlinks a[aria-current="page"] {
  background: color-mix(in srgb, var(--panel) 65%, transparent);
  border: 1px solid var(--border);
  text-decoration: none;
}

.btn {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.08); }

/* ---------- Main ---------- */
main { padding: 26px 0 36px; }
h1 { font-size: 2.0rem; line-height: 1.15; margin: 0 0 10px; }
h2 { font-size: 1.35rem; margin: 26px 0 10px; }
p { margin: 0 0 12px; color: var(--text); }
.muted { color: var(--muted); }
/* Typography scale */
h1 {
  font-size: 2.2rem;
  line-height: 1.2;
  margin-bottom: 0.6em;
}

h2 {
  font-size: 1.4rem;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

h3 {
  font-size: 1.15rem;
  margin-top: 1.5em;
  margin-bottom: 0.4em;
}

p {
  max-width: 65ch;
  margin-bottom: 1em;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 26px 0;
  opacity: 0.6
}
.page-header {
  margin-bottom: 26px;
}

.page-header .subtitle {
  color: var(--muted);
  max-width: 70ch;
}

.page-header h1 {
  border-left: 4px solid var(--link);
  padding-left: 12px;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}