/* Trinity 정적 사이트 — 기존 디자인 토큰(Georgia/Arial + --color-*) 이식 */

/* ===== Design tokens ===== */
:root {
  --layout-header-height: 60px;

  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px;

  --text-display: 22px; --text-title: 17px; --text-body: 15px;
  --text-label: 13px;   --text-meta: 11px;

  --lh-snug: 1.4; --lh-normal: 1.55; --lh-reading: 1.75;
  --tracking-tight: -0.01em; --tracking-label: 0.04em;

  --font-sans: Arial, Helvetica, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;

  --color-bg: #F9F9F9;
  --color-border: #b0aea6;
  --color-text: #1a1814;
  --color-muted: #5a5850;
  --color-orbis-canvas: #F9F9F9;
  --color-event-marker: #c95d4a;
  --foreground: var(--color-text);
}

.dark {
  --color-bg: #212121;
  --color-border: #404038;
  --color-text: #e8e6e0;
  --color-muted: #a8a6a0;
  --color-orbis-canvas: #212121;
  --color-event-marker: #e07a66;
}

/* JS 없는 환경 폴백 */
@media (prefers-color-scheme: dark) {
  :root:not(.dark) {
    --color-bg: #212121;
    --color-border: #404038;
    --color-text: #e8e6e0;
    --color-muted: #a8a6a0;
    --color-orbis-canvas: #212121;
    --color-event-marker: #e07a66;
  }
}

/* ===== Base ===== */
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-serif);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ===== Centered column — 데스크탑·모바일 동일 비율 ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ===== Site header (중앙 정렬, Vitalik 스타일) ===== */
.site-header { padding-top: var(--space-4); }

/* 상단 바: [아이콘+제목] 좌측 묶음 · 토글 우측, 세로 중앙 정렬(같은 높이) */
.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
}
.site-logo__mark { display: block; }

.site-title {
  font-family: var(--font-sans);
  font-size: var(--text-display);
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
}

/* 블로그 이름 ↔ 네비 ↔ 리스트 구분선 */
.rule {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: var(--space-4) 0;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-5);
  font-family: var(--font-sans);
}
.site-nav__link {
  color: var(--color-muted);
  font-size: var(--text-title);
  letter-spacing: var(--tracking-tight);
  transition: color 0.15s ease;
}
.site-nav__link:hover { color: var(--color-text); }
.site-nav__link[data-active="true"] { color: var(--color-event-marker); font-weight: 500; }

/* 다크모드 토글 스위치 — pill + 슬라이딩 knob (좌=라이트, 우=다크) */
.theme-switch {
  position: relative;
  flex-shrink: 0;
  width: 40px;
  height: 22px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: var(--color-border);
  cursor: pointer;
  transition: background 0.2s ease;
}
.theme-switch__knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease;
}
.dark .theme-switch { background: var(--color-event-marker); }
.dark .theme-switch__knob { transform: translateX(18px); }

/* ===== Home (Orrery) — 컬럼 폭 정사각형, 동일 비율 ===== */
.orrery-stage {
  width: 100%;
  aspect-ratio: 1 / 1;
  margin: var(--space-5) auto var(--space-7);
}
#orrery { display: block; width: 100%; height: 100%; }

/* ===== Post list ===== */
.post-list {
  list-style: none;
  margin: 0;
  padding: var(--space-6) 0;
}
.post-item { margin-bottom: var(--space-5); }
.post-date {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-sans);
  font-size: var(--text-meta);
  letter-spacing: var(--tracking-label);
  color: var(--color-muted);
}
.post-link {
  display: block;
  font-size: var(--text-title);
  line-height: var(--lh-snug);
  transition: color 0.15s ease;
}
.post-link:hover { color: var(--color-event-marker); text-decoration: underline; }
.post-empty { color: var(--color-muted); font-style: italic; }

/* ===== Article ===== */
.post-article {
  margin: 0;
  padding: var(--space-6) 0;
}
.post-article__back {
  display: inline-block;
  margin-bottom: var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-label);
  color: var(--color-muted);
  transition: color 0.15s ease;
}
.post-article__back:hover { color: var(--color-text); }
.post-article__title {
  margin: 0;
  font-size: var(--text-display);
  font-weight: 500;
  line-height: var(--lh-snug);
}
.post-article__date {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-meta);
  letter-spacing: var(--tracking-label);
  color: var(--color-muted);
}
.post-article__sub {
  margin-top: var(--space-3);
  font-style: italic;
  font-size: var(--text-title);
  color: var(--color-muted);
}

/* ===== Prose (rendered markdown) ===== */
.prose { margin-top: var(--space-5); font-size: var(--text-title); line-height: var(--lh-reading); }
.prose > :first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3 { line-height: var(--lh-snug); font-weight: 600; margin: 1.6em 0 0.5em; }
.prose h1 { font-size: 1.3em; }
.prose h2 { font-size: 1.15em; }
.prose h3 { font-size: 1em; }
.prose p { margin: 0 0 1em; }
.prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.4em; }
.prose li { margin-bottom: 0.25em; }
.prose a { color: var(--color-event-marker); text-decoration: underline; }
.prose strong { font-weight: 600; }
.prose em { font-style: italic; }
.prose blockquote {
  margin: 0 0 1em;
  padding: 0 0 0 1em;
  border-left: 3px solid var(--color-border);
  color: var(--color-muted);
}
.prose code {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.88em;
  background: color-mix(in srgb, var(--color-text) 7%, transparent);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}
.prose pre {
  overflow-x: auto;
  padding: var(--space-4);
  background: color-mix(in srgb, var(--color-text) 6%, transparent);
  border-radius: 6px;
}
.prose pre code { background: none; padding: 0; }
.prose hr { border: none; border-top: 1px solid var(--color-border); margin: var(--space-5) 0; }
.prose img { max-width: 100%; height: auto; }
.prose table { border-collapse: collapse; margin: 1em 0; }
.prose th, .prose td { border: 1px solid var(--color-border); padding: 0.5em 0.7em; }