@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-50: #eff6ff;
  --accent: #0ea5e9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --sidebar-w: 280px;
  --topnav-h: 48px;
  --header-h: 64px;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topnav-h) + var(--header-h) + 24px); }
body {
  font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* ── Top Nav ── */
.top-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 110;
  height: var(--topnav-h);
  background: var(--gray-900);
  display: flex; align-items: center; justify-content: center; gap: 0;
}
.top-nav a {
  color: rgba(255,255,255,.6); text-decoration: none;
  font-size: 14px; font-weight: 500; padding: 12px 28px;
  transition: all .15s; position: relative;
}
.top-nav a:hover { color: rgba(255,255,255,.9); }
.top-nav a.active { color: #fff; }
.top-nav a.active::after {
  content: ''; position: absolute; bottom: 0; left: 12px; right: 12px;
  height: 2px; background: var(--primary); border-radius: 1px;
}

/* ── Site Header ── */
.site-header {
  position: fixed; top: var(--topnav-h); left:0; right:0; z-index:100;
  height: var(--header-h);
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px;
}
.site-header .logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 700; color: var(--gray-900);
  text-decoration: none;
}
.site-header .logo .logo-icon {
  width: 32px; height: 32px; background: var(--primary);
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 16px;
}
.site-header .logo span { color: var(--primary); }
.header-meta {
  display: flex; align-items: center; gap: 16px;
  font-size: 13px; color: var(--gray-500);
}
.version-badge {
  background: var(--primary-light); color: var(--primary);
  padding: 4px 10px; border-radius: 20px; font-weight: 600; font-size: 12px;
}

/* ── Language Toggle ── */
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--gray-300);
  border-radius: 20px;
  overflow: hidden;
  background: #fff;
}
.lang-btn {
  padding: 4px 12px;
  background: transparent;
  border: 0;
  color: var(--gray-500);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: background 0.15s, color 0.15s;
}
.lang-btn:hover { color: var(--gray-800); }
.lang-btn.active {
  background: var(--primary);
  color: #fff;
}
.lang-btn.active:hover { color: #fff; }

@media (max-width: 960px) {
  .site-header {
    padding-left: 16px;
    padding-right: 16px;
  }
}
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 16px 0;
}
.table-wrap .guide-table { margin: 0; }
th, td {
  min-width: 50px;
  white-space: pre;
}