/* ── Atelier Noir — light (default) ── */
:root {
  --bg: #f6f2e9;
  --card: #fdfaf2;
  --fg: #1a1612;
  --muted: #6f6457;
  --tertiary: #a89c89;
  --line: rgba(26, 22, 18, 0.12);
  --accent: #9a7a36;
  --accent-active: #7a5e26;
  --accent-soft: rgba(154, 122, 54, 0.12);
  --code-bg: rgba(26, 22, 18, 0.06);
  --grad: linear-gradient(135deg, #9a7a36 0%, #b89548 100%);
  --serif: "Gilda Display", Georgia, serif;
  --sans: "Jost", sans-serif;
  --body:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
}
/* ── Atelier Noir — dark (warm charcoal + brass) ── */
[data-theme="dark"] {
  --bg: #15120e;
  --card: #211c16;
  --fg: #f1ece2;
  --muted: #b3aa98;
  --tertiary: #8a8170;
  --line: rgba(241, 236, 226, 0.14);
  --accent: #c9a24a;
  --accent-active: #e3c887;
  --accent-soft: rgba(201, 162, 74, 0.14);
  --code-bg: rgba(241, 236, 226, 0.08);
  --grad: linear-gradient(135deg, #c9a24a 0%, #d9b65f 100%);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  color: var(--fg);
  line-height: 1.8;
  font-family: var(--body);
  background:
    radial-gradient(60% 40% at 100% 0%, var(--accent-soft), transparent 70%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}
::selection {
  background: rgba(154, 122, 54, 0.22);
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
.nav {
  display: flex;
  gap: 18px;
  align-items: center;
  margin-bottom: 36px;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}
.nav .links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  flex: 1;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.nav a:hover {
  color: var(--accent);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  cursor: pointer;
  transition:
    transform 0.2s,
    border-color 0.2s,
    color 0.3s,
    background 0.3s;
}
.theme-toggle:hover {
  transform: rotate(-18deg);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  color: var(--accent);
}
.theme-toggle:active {
  transform: scale(0.92);
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
}
.theme-toggle .ico-moon {
  display: none;
}
[data-theme="dark"] .theme-toggle .ico-sun {
  display: none;
}
[data-theme="dark"] .theme-toggle .ico-moon {
  display: block;
}
h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 2.3rem;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
}
h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: 0.01em;
  margin: 44px 0 14px;
  position: relative;
  padding-left: 16px;
}
h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 4px;
  border-radius: 4px;
  background: var(--grad);
}
.meta {
  color: var(--tertiary);
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  margin-bottom: 44px;
}
p,
li {
  color: var(--fg);
}
code {
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 5px;
  word-break: break-all;
}
ul {
  padding-left: 1.2em;
}
li {
  margin: 6px 0;
}
a {
  color: var(--accent);
}
a:hover {
  color: var(--accent-active);
}
.notice {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  border-radius: 10px;
  margin: 18px 0;
  font-size: 0.95rem;
  box-shadow:
    0 1px 2px rgba(26, 22, 18, 0.04),
    0 8px 24px rgba(26, 22, 18, 0.05);
}
footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
footer a {
  color: var(--accent);
  text-decoration: none;
}
footer a:hover {
  color: var(--accent-active);
}