@font-face {
  font-family: 'Pixellari';
  src: url('../fonts/Pixellari.woff2') format('woff2');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'GohuFont';
  src: url('../fonts/gohufont.woff2') format('woff2');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/JetBrainsMono-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #0b0f14;
  --bg-secondary: #0f1419;
  --panel: #111827;
  --panel-hover: #1a2233;
  --border: #1f2937;
  --border-light: #2d3748;
  --text: #f3f4f6;
  --text-secondary: #d1d5db;
  --muted: #9ca3af;
  --muted-dark: #6b7280;
  --accent: #7dd3fc;
  --accent-hover: #38bdf8;
  --accent-dim: rgba(125, 211, 252, 0.1);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.1);
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.1);
  --sidebar-width: 280px;
  --content-max-width: 900px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
  transition: opacity 0.15s ease;
}

.sidebar-header:hover {
  opacity: 0.8;
}

.logo-text {
  font-family: 'Pixellari', monospace;
  font-size: 22px;
  letter-spacing: 0.5px;
}

.logo-sub {
  font-family: 'Pixellari', monospace;
  font-size: 22px;
  color: var(--muted);
  margin-left: 4px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-dark);
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 2px 0;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  transition: all 0.15s ease;
  line-height: 1.5;
}

.nav-link:hover {
  background: var(--panel);
  color: var(--text);
}

.nav-item.active .nav-link {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 500;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.back-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.back-link:hover {
  color: var(--text);
}

.back-link svg {
  flex-shrink: 0;
}

/* ===== MAIN CONTENT ===== */
main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  padding: 48px 64px;
  max-width: calc(var(--sidebar-width) + var(--content-max-width) + 128px);
}

/* ===== DOC ARTICLE ===== */
.doc {
  max-width: var(--content-max-width);
}

.doc > h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 32px 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

.doc > h2 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  margin: 48px 0 16px 0;
  color: var(--text);
  letter-spacing: -0.01em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.doc > h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin: 32px 0 12px 0;
  color: var(--text);
}

.doc > h4 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin: 24px 0 8px 0;
  color: var(--text);
}

.doc > p {
  margin: 0 0 16px 0;
  color: var(--text-secondary);
}

.doc > p strong {
  color: var(--text);
  font-weight: 600;
}

.doc a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.15s ease;
}

.doc a:hover {
  text-decoration: underline;
  opacity: 0.85;
}

.doc ul,
.doc ol {
  margin: 0 0 16px 0;
  padding-left: 24px;
  color: var(--text-secondary);
}

.doc li {
  margin: 6px 0;
}

.doc li::marker {
  color: var(--muted-dark);
}

.doc ul li::marker {
  font-size: 10px;
}

.doc blockquote {
  margin: 24px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
}

.doc blockquote > *:first-child {
  margin-top: 0;
}

.doc blockquote > *:last-child {
  margin-bottom: 0;
}

.doc hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ===== CODE ===== */
code {
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  font-size: 13px;
  background: var(--panel);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
  word-break: break-word;
}

pre {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: var(--text-secondary);
  font-size: 13px;
  word-break: normal;
}

/* File path label above code blocks */
.doc pre[data-filename]::before {
  content: attr(data-filename);
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ===== TABLES ===== */
.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

.doc th,
.doc td {
  padding: 10px 14px;
  text-align: left;
  border: 1px solid var(--border);
}

.doc th {
  background: var(--panel);
  font-weight: 600;
  color: var(--text);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.doc td {
  color: var(--text-secondary);
}

.doc tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

/* ===== CALLOUTS ===== */
.callout {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  border: 1px solid var(--border);
  align-items: flex-start;
}

.callout-icon {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

.callout-content {
  flex: 1;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.callout-content p {
  margin: 0;
}

.callout-content a {
  color: var(--accent);
}

.callout-info {
  background: var(--accent-dim);
  border-color: rgba(125, 211, 252, 0.2);
}

.callout-warning {
  background: var(--warning-bg);
  border-color: rgba(251, 191, 36, 0.2);
}

.callout-warning .callout-icon {
  color: var(--warning);
}

.callout-danger {
  background: var(--danger-bg);
  border-color: rgba(248, 113, 113, 0.2);
}

.callout-danger .callout-icon {
  color: var(--danger);
}

/* ===== ARCHIVE BANNER ===== */
.archive-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--warning-bg);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-md);
  color: var(--warning);
  font-size: 14px;
  font-weight: 500;
  margin: 0 0 24px 0;
}

.archive-banner::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--warning);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== DOC LIST / INDEX ===== */
.doc-list {
  max-width: var(--content-max-width);
}

.doc-list > h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 16px 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

.doc-list-description {
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 40px 0;
  line-height: 1.6;
}

.doc-list-description p {
  margin: 0;
}

/* ===== GUIDES GRID ===== */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.guide-card {
  display: block;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  position: relative;
}

.guide-card:hover {
  background: var(--panel-hover);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.guide-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 8px 0;
  line-height: 1.4;
}

.guide-card-summary {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.guide-card-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 12px;
}

.guide-card-badge.archived {
  background: var(--warning-bg);
  color: var(--warning);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* ===== SELECTION ===== */
::selection {
  background: rgba(125, 211, 252, 0.25);
  color: var(--text);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  main {
    padding: 32px 40px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    position: relative;
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  body {
    flex-direction: column;
  }

  main {
    margin-left: 0;
    padding: 24px;
  }

  .guides-grid {
    grid-template-columns: 1fr;
  }

  .doc > h1 {
    font-size: 28px;
  }

  .doc > h2 {
    font-size: 20px;
  }
}

/* ===== 404 PAGE ===== */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 60vh;
  padding: 40px 24px;
}

.error-code {
  font-family: 'Pixellari', monospace;
  font-size: 96px;
  color: var(--accent);
  line-height: 1;
  margin: 0 0 16px 0;
  text-shadow: 0 0 40px rgba(125, 211, 252, 0.15);
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 12px 0;
  letter-spacing: -0.02em;
}

.error-message {
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 32px 0;
  max-width: 400px;
  line-height: 1.6;
}

.error-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--accent);
  color: #0a0a0a;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s ease;
}

.error-home:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ===== PRINT ===== */
@media print {
  .sidebar {
    display: none;
  }

  main {
    margin-left: 0;
    padding: 0;
    max-width: none;
  }

  .doc {
    max-width: none;
  }
}