:root {
  --bg: #E8ECE6;
  --surface: #F8F6EF;
  --surface-sunken: #DCE1D8;
  --ink: #211D17;
  --ink-soft: #6C6558;
  --line: #C7C0AC;
  --accent: #B23B2E;
  --shadow: 0 1px 2px rgba(33, 29, 23, 0.07), 0 10px 26px rgba(33, 29, 23, 0.06);

  --vault-bg: #241B29;
  --vault-surface: #2E2233;
  --vault-ink: #EDE3E8;
  --vault-soft: #B8A6BE;
  --vault-accent: #C89ED6;
  --vault-line: #4A3A52;

  --font-display: ui-serif, Georgia, "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15180F;
    --surface: #1E2119;
    --surface-sunken: #262A20;
    --ink: #ECE7DA;
    --ink-soft: #A39C89;
    --line: #3A3F31;
    --accent: #D8664B;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.55), 0 10px 26px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 28px; }

a { color: inherit; }

nav.site {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
nav.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}
.wordmark {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.navlinks {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.navlinks a {
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: color .15s ease, border-color .15s ease;
}
.navlinks a:hover { color: var(--ink); border-color: var(--ink); }
.navlinks .div { width: 1px; height: 14px; background: var(--line); }
.navlinks a.r18 { color: var(--vault-accent); }

.hero { padding: 60px 0 52px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 14px;
}
h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 36px;
  line-height: 1.32;
  margin: 0 0 18px;
}
.lede {
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 22px;
  font-size: 15.5px;
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-soft);
}
.meta-row span b { color: var(--ink); font-weight: 600; }

.shelf { padding: 40px 0; border-top: 1px solid var(--line); }
.shelf-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.shelf-head .idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 4px;
}
.shelf-head h2 { font-family: var(--font-display); font-size: 22px; margin: 0; }
.shelf-head p { color: var(--ink-soft); font-size: 13.5px; max-width: 34ch; margin: 0; }

.empty-card {
  background: var(--surface);
  border: 1.5px dashed var(--line);
  border-radius: 3px;
  padding: 22px;
  color: var(--ink-soft);
  font-size: 13.5px;
}
.empty-card b { color: var(--ink); font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; text-transform: uppercase; display: block; margin-bottom: 6px; }

.vault-teaser {
  background: var(--vault-bg);
  color: var(--vault-ink);
  border-top: 1px solid var(--vault-line);
  border-bottom: 1px solid var(--vault-line);
  padding: 40px 0;
}
.vault-teaser .wrap { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.vault-teaser .eyebrow { color: var(--vault-soft); }
.vault-teaser h2 { font-family: var(--font-display); font-size: 19px; margin: 0 0 6px; }
.vault-teaser p { color: var(--vault-soft); margin: 0; font-size: 13.5px; max-width: 44ch; }
.vault-teaser .go {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vault-accent);
  text-decoration: none;
  border: 1px solid var(--vault-accent);
  padding: 8px 14px;
  border-radius: 2px;
  white-space: nowrap;
}

.vault-fill { fill: none; }
.vault-stroke { stroke: var(--vault-accent); }
.vault-text { fill: var(--vault-accent); }

footer {
  padding: 32px 0 48px;
  color: var(--ink-soft);
  font-size: 12px;
  font-family: var(--font-mono);
  border-top: 1px solid var(--line);
}

/* gate page */
.gate-page { min-height: calc(100vh - 60px); display: flex; align-items: center; justify-content: center; padding: 40px 24px; }
.gate-card {
  max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 32px;
}
.gate-card h1 { font-size: 26px; margin-bottom: 12px; }
.gate-card p { color: var(--ink-soft); font-size: 14px; }
.gate-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  padding: 10px 16px;
  border-radius: 2px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--surface-sunken);
  color: var(--ink);
}
.btn-primary { border-color: var(--accent); color: var(--accent); }
.btn:hover { filter: brightness(0.96); }

/* r18 vault page */
.vault-note {
  max-width: 560px;
  margin: 60px auto;
  background: var(--vault-surface);
  color: var(--vault-ink);
  border: 1.5px dashed var(--vault-line);
  border-radius: 4px;
  padding: 32px;
}
.vault-note .eyebrow { color: var(--vault-soft); }
.vault-note p { color: var(--vault-soft); }
.vault-note .go { font-family: var(--font-mono); font-size: 12.5px; color: var(--vault-accent); text-decoration: none; }

@media (max-width: 640px) {
  h1 { font-size: 28px; }
  .navlinks { display: none; }
  .vault-teaser .wrap { flex-direction: column; align-items: flex-start; }
  .vault-teaser .go { margin-left: 0; }
}