:root {
  --bg: #0f1419;
  --bg-card: #1a1f2e;
  --bg-hover: #252b3d;
  --border: #2d3548;
  --text: #e1e4eb;
  --text-dim: #8892a4;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --accent3: #d29922;
  --accent4: #f97583;
  --code-bg: #161b26;
  --header-bg: #0d1117;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Header */
.header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky; top: 0; z-index: 100;
}
.header .container { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.header h1 { font-size: 18px; font-weight: 700; white-space: nowrap; }
.header h1 span { color: var(--accent); }
.header h1 a { color: var(--text); }
.header .subtitle { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.header .nav-links { margin-left: auto; display: flex; gap: 8px; }
.header .nav-links a { font-size: 12px; color: var(--text-dim); padding: 2px 8px; border-radius: 4px; }
.header .nav-links a:hover { color: var(--accent); background: var(--bg-hover); text-decoration: none; }
.cat-tabs { display: flex; gap: 4px; flex-wrap: nowrap; width: 100%; margin-top: 4px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.cat-tabs::-webkit-scrollbar { display: none; }
.cat-tabs a {
  font-size: 11px; color: var(--text-dim); padding: 2px 10px;
  background: var(--bg-card); border-radius: 12px; white-space: nowrap; flex-shrink: 0;
}
.cat-tabs a:hover { background: var(--accent); color: #fff; text-decoration: none; }
.cat-tabs a.active { background: var(--accent); color: #fff; }

/* Hero */
.hero {
  text-align: center;
  padding: 48px 0 24px;
}
.hero h2 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.hero h2 small { display: block; color: var(--text-dim); font-weight: 400; font-size: 14px; margin-top: 6px; }
.hero p { color: var(--text-dim); font-size: 15px; max-width: 600px; margin: 0 auto; }

/* Stats bar */
.stats-bar {
  display: flex; justify-content: center; gap: 32px;
  padding: 20px 0; margin: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stat { text-align: center; font-size: 13px; color: var(--text-dim); }
.stat strong { display: block; font-size: 24px; color: var(--accent); margin-bottom: 2px; }

/* Architecture Map */
.arch-map {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin: 24px 0;
}
.arch-map h2 { text-align: center; margin-bottom: 20px; font-size: 18px; }
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.arch-group {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}
.arch-group h3 { font-size: 14px; color: var(--accent); margin-bottom: 8px; }
.arch-group .items { display: flex; flex-wrap: wrap; gap: 5px; }
.arch-group .items a {
  font-size: 13px;
  color: var(--text);
  padding: 3px 10px;
  background: var(--bg-card);
  border-radius: 4px;
}
.arch-group .items a:hover { background: var(--accent); color: #fff; text-decoration: none; }

/* Section Headers */
.section-header {
  margin: 40px 0 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
  font-size: 22px;
  font-weight: 700;
}

/* Doc Card Grid */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
  margin-bottom: 40px;
}
.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  transition: border-color 0.2s, background 0.2s;
}
.doc-card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
}
.doc-card .card-header { margin-bottom: 8px; }
.doc-card .cat-badge {
  font-size: 11px; padding: 2px 8px; border-radius: 4px;
  background: var(--bg); color: var(--text-dim);
}
.doc-card h3 { font-size: 15px; margin-bottom: 6px; }
.doc-card h3 a { color: var(--text); }
.doc-card h3 a:hover { color: var(--accent); text-decoration: none; }
.doc-card p { font-size: 13px; color: var(--text-dim); line-height: 1.5; }

/* Content Pages */
.content { padding: 24px 0 64px; }
.doc-meta { margin-bottom: 8px; }
.doc-cat { font-size: 12px; color: var(--text-dim); background: var(--bg-card); padding: 2px 10px; border-radius: 4px; }
.doc-body h1 { font-size: 28px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.doc-body h2 { font-size: 22px; margin: 36px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border); color: var(--accent); }
.doc-body h3 { font-size: 17px; margin: 24px 0 10px; color: var(--accent2); }
.doc-body h4 { font-size: 15px; margin: 18px 0 8px; color: var(--accent3); }
.doc-body p { margin-bottom: 10px; color: var(--text-dim); font-size: 14px; line-height: 1.8; }
.doc-body ul, .doc-body ol { margin: 6px 0 14px 20px; color: var(--text-dim); font-size: 14px; }
.doc-body li { margin-bottom: 4px; }
.doc-body strong { color: var(--text); }

/* SVG containers */
.svg-container { margin: 16px 0; text-align: center; }
.svg-container img { max-width: 100%; height: auto; border: 1px solid var(--border); border-radius: 8px; }

/* Code Blocks */
.doc-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 14px 0;
  overflow-x: auto;
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}
.doc-body code {
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  font-size: 13px;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
}
.doc-body pre code { background: none; padding: 0; border-radius: 0; }

/* Tables */
.doc-body .table-wrap {
  overflow-x: auto;
  margin: 14px 0;
  -webkit-overflow-scrolling: touch;
  position: relative;
  mask-image: linear-gradient(to right, black calc(100% - 30px), transparent 100%);
  -webkit-mask-image: linear-gradient(to right, black calc(100% - 30px), transparent 100%);
}
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.doc-body th, .doc-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  white-space: nowrap;
}
.doc-body th { background: var(--bg-hover); color: var(--text); font-weight: 600; }
.doc-body td { color: var(--text-dim); }
.doc-body tr:hover td { background: var(--bg-hover); }

/* Blockquotes */
.doc-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 16px;
  margin: 14px 0;
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 13px;
  border-radius: 0 4px 4px 0;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

/* Status Badges */
.status-badge {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 600;
  margin-left: 6px;
  vertical-align: middle;
}
.status-planned  { background: #1a2744; color: #58a6ff; border: 1px solid #264a78; }
.status-added    { background: #1a2e1a; color: #3fb950; border: 1px solid #236323; }
.status-verified { background: #2a2210; color: #d29922; border: 1px solid #6d4a0e; }

/* Pipeline Section */
.pipeline-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 32px;
}
.planned-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
}
.planned-card .planned-title { color: var(--text); font-weight: 500; }
.planned-card .planned-date  { color: var(--text-dim); font-size: 11px; margin-left: auto; }
.planned-card .note { color: var(--text-dim); font-size: 11px; font-style: italic; }

/* Stats extra */
.stat-verified strong { color: var(--accent3) !important; }
.stat-added    strong { color: var(--accent2) !important; }
.stat-planned  strong { color: var(--accent)  !important; }

/* Mobile Category Filter Dropdown */
.category-filter {
  display: none;
  width: 100%;
  margin: 12px 0;
}
.category-filter select {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238892a4' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
}
.category-filter select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Responsive */
@media (max-width: 800px) {
  .arch-grid { grid-template-columns: repeat(2, 1fr); }
  .doc-grid { 
    grid-template-columns: 1fr; 
    gap: 10px;
  }
  .header .container { flex-direction: column; align-items: flex-start; }
  .header .nav-links { margin-left: 0; }
  .stats-bar { gap: 16px; }
  .category-filter { display: block; }
  .section-header { font-size: 18px; margin: 24px 0 12px; }
  .doc-card { padding: 12px; }
  .doc-card h3 { font-size: 14px; }
  .doc-card p { font-size: 12px; }
  .hero { padding: 24px 0 16px; }
  .hero h2 { font-size: 22px; }
  .hero h2 small { font-size: 12px; }
  .hero p { font-size: 13px; }
  .container { padding: 0 16px; }
  .doc-body .table-wrap { margin: 10px 0; }
  .doc-body table { font-size: 12px; }
  .doc-body th, .doc-body td { padding: 6px 8px; }
}
@media (max-width: 500px) {
  .arch-grid { grid-template-columns: 1fr; }
  .stats-bar { 
    flex-wrap: wrap; 
    gap: 12px;
    padding: 16px 0;
  }
  .stat { flex: 1; min-width: 45%; }
  .stat strong { font-size: 20px; }
  .pipeline-list .planned-card {
    flex-wrap: wrap;
    gap: 6px;
  }
  .pipeline-list .planned-card .note {
    width: 100%;
    margin-top: 4px;
  }
  .doc-body table { font-size: 11px; }
  .doc-body th, .doc-body td { padding: 4px 6px; }
}