/* ==========================================================================
   Video Embed — Common styles (white minimal)
   ========================================================================== */

:root {
  --bg: #ffffff;
  --card: #ffffff;
  --border: #ececec;
  --border-strong: #d9d9d9;
  --text: #111111;
  --muted: #737373;
  --subtle: #f7f7f7;
  --primary: #b91c1c;
  --primary-hover: #991b1b;
  --primary-soft: #fef2f2;
  --accent: #ef4444;
  --success: #10b981;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --radius: 10px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR",
    "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: var(--primary-hover); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }
.brand-name {
  font-weight: 800;
  font-size: 22px;
}
.brand-name .c1 { color: #b91c1c; }
.brand-name .c2 { color: #f97316; }
.brand-name .c3 { color: #eab308; }
.brand-name .c4 { color: #22c55e; }
.brand-name .c5 { color: #0ea5e9; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.site-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.15s;
}
.site-nav a:hover {
  color: var(--text);
  background: none;
  text-decoration: none;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 24px 20px 32px;
  background: #fff;
}
.footer-inner {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.footer-inner p { margin: 4px 0; }
.footer-nav {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 8px;
  margin: 6px 0;
}
.footer-nav a { color: var(--muted); font-size: 13px; }
.footer-nav a:hover { color: var(--text); }
.footer-nav .sep { color: #d0d0d0; }
.contact a { color: var(--primary); }

/* ===== Page shell ===== */
.page {
  padding: 40px 0 20px;
}
.page-title {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.page-subtitle {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 14px;
}

/* ===== Typography (prose docs) ===== */
.prose h2 {
  font-size: 20px;
  margin: 36px 0 10px;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.prose h3 {
  font-size: 16px;
  margin: 22px 0 6px;
  font-weight: 600;
}
.prose p { margin: 0 0 12px; color: #333; }
.prose ul, .prose ol {
  margin: 0 0 14px;
  padding-left: 20px;
  color: #333;
}
.prose li { margin-bottom: 4px; }
.prose strong { color: var(--text); font-weight: 600; }
.prose code {
  background: var(--subtle);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  color: #111;
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ===== Card (flat white) ===== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 14px;
}
.card h2 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  text-decoration: none;
  font-family: inherit;
  line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); color: #fff; border-color: var(--primary-hover); }
.btn-ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--subtle); color: var(--text); }

/* ===== CTA (minimal link row) ===== */
.cta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 24px 0 0;
  background: #fff;
}
.cta-row .cta-text { flex: 1 1 auto; min-width: 180px; }
.cta-row strong { display: block; font-size: 14px; margin-bottom: 2px; }
.cta-row small { color: var(--muted); font-size: 13px; }

/* ===== SEO tag cloud (related keywords) ===== */
.seo-tags {
  margin: 52px 0 0;
  padding: 18px 0 4px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  line-height: 1.8;
  color: #b3b3b3;
}
.seo-tags strong {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  color: #a1a1a1;
  font-size: 11px;
  letter-spacing: 0.02em;
}
.seo-tags p { margin: 0; color: #b3b3b3; word-break: keep-all; }
.seo-tags a { color: #b3b3b3; text-decoration: none; }
.seo-tags a:hover { color: var(--muted); text-decoration: none; }

/* ===== Figure / image placeholder ===== */
.figure {
  margin: 14px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  overflow: hidden;
}
.figure img { width: 100%; display: block; }
.figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: var(--subtle);
  border-top: 1px solid var(--border);
}
.figure.placeholder {
  border-style: dashed;
  padding: 28px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.figure.placeholder code {
  background: var(--subtle);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .header-inner { padding: 14px 16px; }
  .brand { font-size: 15px; }
  .container { padding: 0 16px; }
  .page-title { font-size: 22px; }
  .prose h2 { font-size: 18px; }
  .cta-row { flex-direction: column; align-items: stretch; text-align: left; }
  .cta-row .btn { width: 100%; }
}