:root {
  --bg: #07070d;
  --s1: #0f0f1a;
  --s2: #161625;
  --s3: #1f1f33;
  --border: #252538;
  --border-focus: #7c6aff;
  --accent: #7c6aff;
  --accent-light: rgba(124, 106, 255, 0.12);
  --accent-glow: rgba(124, 106, 255, 0.28);
  --a2: #ff5f7e;
  --a3: #00e5a0;
  --a3-light: rgba(0, 229, 160, 0.12);
  --a4: #38bdf8;
  --text: #eeeef8;
  --muted: #8b8ba8;
  --muted2: #5a5a78;
  --font-main: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-head: 'Syne', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 14px rgba(0,0,0,0.25);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.4);
}

body.light {
  --bg: #f4f4fa;
  --s1: #ffffff;
  --s2: #ebebf5;
  --s3: #e0e0ee;
  --border: #d4d4e6;
  --border-focus: #6758dc;
  --accent: #6758dc;
  --accent-light: rgba(103, 88, 220, 0.1);
  --accent-glow: rgba(103, 88, 220, 0.22);
  --a2: #e04b6c;
  --a3: #089767;
  --a3-light: rgba(8, 151, 103, 0.1);
  --a4: #0284c7;
  --text: #1a1a2e;
  --muted: #5e5e7c;
  --muted2: #8484a0;
  --shadow-sm: 0 4px 14px rgba(40,30,90,0.08);
  --shadow-lg: 0 16px 40px rgba(40,30,90,0.12);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Site Navigation (Consistent with PDFHub) */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: rgba(7, 7, 13, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.2s, border-color 0.2s;
}

body.light .site-nav {
  background: rgba(244, 244, 250, 0.9);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  text-decoration: none;
  background: linear-gradient(135deg, #fff 0%, #a594fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
}

.nav-divider {
  color: var(--muted2);
  font-weight: 300;
  font-size: 1.1rem;
}

.nav-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 99px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

.nav-subtle-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--s1);
  color: var(--text);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.nav-subtle-link:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-1px);
}

.global-theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px 5px 12px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--s1);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.global-theme-toggle:hover {
  border-color: var(--accent);
}

.toggle-track {
  display: inline-flex;
  align-items: center;
  width: 32px;
  height: 18px;
  border-radius: 99px;
  background: var(--s2);
  border: 1px solid var(--border);
  padding: 2px;
  position: relative;
}

.toggle-knob {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8px;
  color: #fff;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light .toggle-knob {
  transform: translateX(14px);
  background: #f59e0b;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--s1);
  color: var(--text);
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.menu-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

/* Documentation Shell */
.doc-shell {
  flex: 1 0 auto;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 24px 80px;
}

/* Hero Section */
.doc-hero {
  text-align: center;
  padding: 30px 16px 42px;
  position: relative;
}

.doc-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 99px;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.doc-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.doc-hero p {
  max-width: 760px;
  margin: 0 auto 26px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.doc-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  max-width: 980px;
  margin: 0 auto 36px;
}

.doc-stat-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--s1);
  border: 1px solid var(--border);
  text-align: left;
  transition: border-color 0.2s, transform 0.2s;
}

.doc-stat-pill:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.doc-stat-pill i {
  font-size: 1.3rem;
  color: var(--accent);
  flex-shrink: 0;
}

.doc-stat-pill.success i {
  color: var(--a3);
}

.doc-stat-pill strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
}

.doc-stat-pill span {
  font-size: 0.72rem;
  color: var(--muted);
}

/* Master Search Bar */
.doc-search-wrapper {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

.doc-search-input {
  width: 100%;
  padding: 16px 52px 16px 48px;
  border-radius: 99px;
  background: var(--s1);
  border: 1.5px solid var(--border);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 1rem;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.doc-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-sm);
  background: var(--s2);
}

.doc-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 1.05rem;
  pointer-events: none;
}

.doc-search-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 0;
  background: var(--s3);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.2s ease;
}

.doc-search-clear.visible {
  display: inline-flex;
}

.doc-search-clear:hover {
  color: var(--text);
  background: var(--accent);
}

/* Navigation Tabs */
.doc-tabs-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.doc-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 99px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  font-family: var(--font-main);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.doc-tab-btn:hover {
  color: var(--text);
  background: var(--s2);
}

.doc-tab-btn.active {
  color: var(--accent);
  background: var(--accent-light);
  border-color: var(--accent);
  font-weight: 700;
}

/* Category Filter Chips */
.filter-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.filter-chip {
  padding: 6px 14px;
  border-radius: 99px;
  background: var(--s1);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-chip:hover {
  border-color: var(--accent);
  color: var(--text);
}

.filter-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Tool Grid & Cards */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 50px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
}

.tool-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.tool-card-title-group {
  flex: 1;
  min-width: 0;
}

.tool-card-title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.tool-category-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--s2);
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.tool-card-desc {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
}

.tool-specs-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  background: var(--s2);
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  font-size: 0.76rem;
}

.tool-spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.tool-spec-label {
  color: var(--muted2);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.3px;
}

.tool-spec-val {
  color: var(--text);
  font-weight: 500;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-privacy-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 700;
  font-size: 0.72rem;
}

.tool-privacy-tag.local {
  color: var(--a3);
}

.tool-privacy-tag.assisted {
  color: var(--a4);
}

.tool-privacy-tag.api {
  color: #f59e0b;
}

.tool-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
}

.tool-btn-primary {
  grid-column: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 700;
  transition: all 0.2s ease;
}

.tool-btn-primary:hover {
  background: #6a57f2;
  box-shadow: 0 4px 14px var(--accent-glow);
  transform: translateY(-1px);
}

.tool-btn-subtle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  background: var(--s2);
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-size: 0.74rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.tool-btn-subtle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* Documentation Content Panels */
.doc-section {
  display: none;
  animation: fadeIn 0.3s ease;
}

.doc-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.doc-panel-box {
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
}

.doc-panel-box h2 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.doc-panel-box h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--text);
}

.doc-panel-box p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* Info Alert Callouts */
.doc-callout {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background: var(--s2);
  border-left: 4px solid var(--accent);
  margin: 20px 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.6;
}

.doc-callout i {
  color: var(--accent);
  font-size: 1.2rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.doc-callout.success {
  border-left-color: var(--a3);
  background: var(--a3-light);
}

.doc-callout.success i {
  color: var(--a3);
}

.doc-callout.warning {
  border-left-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}

.doc-callout.warning i {
  color: #f59e0b;
}

/* Documentation Tables */
.doc-table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.86rem;
}

.doc-table th {
  background: var(--s2);
  color: var(--text);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.doc-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.doc-table tr:last-child td {
  border-bottom: none;
}

.doc-table tr:hover td {
  background: var(--accent-light);
}

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

.doc-table code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--s3);
  color: var(--a4);
  font-size: 0.82rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Accordion FAQ */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--s2);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--accent);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 20px;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-head);
  font-size: 0.96rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  gap: 12px;
}

.faq-icon {
  transition: transform 0.2s ease;
  color: var(--muted);
  font-size: 0.85rem;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  display: none;
  padding: 0 20px 18px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Quick Markdown Links Grid */
.md-docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.md-doc-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: var(--s2);
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.md-doc-card:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-2px);
}

.md-doc-card i {
  color: var(--accent);
  font-size: 1.1rem;
}

/* Shared Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: var(--s1);
  padding: 40px 24px 30px;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-shell {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .site-nav {
    padding: 12px 18px;
  }
  .doc-shell {
    padding: 24px 16px 60px;
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .footer-top, .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}