/* BYO Platform — 서비스 소개 (SPA About + static about.html 공통) */
:root {
  --ui-radius: 8px;
  --ui-border: #cbd5e1;
  --ui-border-soft: #e2e8f0;
  --ui-bg-muted: #f8fafc;
  --ui-text: #0f172a;
  --ui-text-muted: #64748b;
  --ui-primary: #0f172a;
  --ui-primary-hover: #1e293b;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body.about-page {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ui-text);
  background: #f1f5f9;
  -webkit-font-smoothing: antialiased;
}

.about-shell {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.about-top {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
  text-decoration: none;
  color: inherit;
}

.about-top img {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.about-top strong {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.about-card {
  background: #fff;
  border: 1px solid var(--ui-border-soft);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
  margin-bottom: 1rem;
}

.about-card.hero {
  background: linear-gradient(145deg, #f8fafc 0%, #fff 55%);
}

.about-eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ui-text-muted);
}

.about-title {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ui-text);
}

.about-lead {
  margin: 0;
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.65;
}

.about-card h2 {
  margin: 0 0 0.65rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ui-text);
}

.about-card p {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  color: #475569;
}

.about-card p:last-child {
  margin-bottom: 0;
}

.about-card ul {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.92rem;
  color: #475569;
}

.about-card li {
  margin-bottom: 0.4rem;
}

.about-card li strong {
  color: var(--ui-text);
  font-weight: 600;
}

.about-card code {
  font-family: ui-monospace, 'Cascadia Code', monospace;
  font-size: 0.85em;
  background: var(--ui-bg-muted);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--ui-border-soft);
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.95rem;
  border-radius: var(--ui-radius);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--ui-border);
  background: #fff;
  color: var(--ui-text);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.about-btn:hover {
  background: var(--ui-bg-muted);
  border-color: #94a3b8;
}

.about-btn.primary {
  background: var(--ui-primary);
  color: #f8fafc;
  border-color: var(--ui-primary);
}

.about-btn.primary:hover {
  background: var(--ui-primary-hover);
  border-color: var(--ui-primary-hover);
}

.about-btn.ghost {
  background: transparent;
  border-color: transparent;
  color: #334155;
  font-weight: 500;
}

.about-btn.ghost:hover {
  background: var(--ui-bg-muted);
  border-color: var(--ui-border-soft);
}

.about-foot {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--ui-text-muted);
  text-align: center;
}

.about-foot a {
  color: #334155;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-en {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--ui-border-soft);
  font-size: 0.88rem;
  color: var(--ui-text-muted);
}

.about-page a:not(.about-btn):not(.about-top) {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}

.about-page a:not(.about-btn):not(.about-top):hover {
  text-decoration: underline;
}