/* ==========================================================================
   Sotto.tools — Shared Stylesheet
   ========================================================================== */

:root {
  --bg: #f4f1ea;
  --bg-soft: #ebe6db;
  --ink: #1a1814;
  --ink-soft: #4a4640;
  --ink-muted: #8a847a;
  --accent: #2a5c8a;
  --accent-red: #c8442a;
  --accent-green: #3d6b4e;
  --line: #2a2620;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(42, 92, 138, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(61, 107, 78, 0.04) 0%, transparent 40%);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--accent-red); }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 20px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  font-family: 'Fraunces', serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  width: 28px;
  height: 28px;
  background: var(--ink);
  position: relative;
  display: inline-block;
}
.brand-mark::after {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--brand-accent, var(--accent));
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-decoration: none;
}
.nav-links a:hover { color: var(--accent); }

/* Document / legal pages */
.doc-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 80px 32px 40px;
}

.doc-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.doc-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.doc-wrap h1 {
  font-family: 'Fraunces', serif;
  font-weight: 800;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.doc-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.doc-wrap h2 {
  font-family: 'Fraunces', serif;
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.02em;
  margin-top: 48px;
  margin-bottom: 16px;
  line-height: 1.2;
}

.doc-wrap h3 {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 18px;
  margin-top: 28px;
  margin-bottom: 12px;
}

.doc-wrap p {
  margin-bottom: 16px;
  color: var(--ink-soft);
}

.doc-wrap ul, .doc-wrap ol {
  margin: 16px 0 16px 24px;
  color: var(--ink-soft);
}
.doc-wrap li {
  margin-bottom: 8px;
}

.doc-wrap strong {
  color: var(--ink);
  font-weight: 600;
}

.callout {
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  margin: 24px 0;
  font-size: 14px;
}
.callout strong {
  display: block;
  font-family: 'Fraunces', serif;
  font-size: 16px;
  margin-bottom: 6px;
}

/* Footer */
footer {
  margin-top: 120px;
  padding: 48px 32px;
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: var(--bg);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.7;
  text-decoration: none;
}
.footer-links a:hover { opacity: 1; color: var(--bg); }
.footer-inner p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 820px) {
  .site-header { padding: 16px 20px; }
  .doc-wrap { padding: 48px 20px 24px; }
  .nav-links { gap: 16px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}