:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --line: #f1f3f5;
  --line-strong: #e2e8f0;
  --text: #1a1a1a;
  --muted: #666666;
  --primary: #2563eb;
  --primary-soft: #eff6ff;
  --primary-hover: #1d4ed8;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Segoe UI",
    Roboto, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

/* Sidebar */
.toc {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow: auto;
  background: #ffffff;
  border-right: 1px solid var(--line);
  padding: 40px 24px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 32px;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  background: var(--primary);
}

.brand h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.brand p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.toc .group {
  margin-top: 32px;
}

.toc .group-title {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #a0a0a0;
  margin: 0 0 12px 8px;
  font-weight: 600;
}

.toc a {
  display: block;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  color: #555555;
  transition: all 0.2s;
}

.toc a:hover {
  background: #f0f4ff;
  color: var(--primary);
}
.toc a.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

/* Main */
.main {
  padding: 60px 80px;
  max-width: 1200px;
}

.shell-content {
  min-width: 0;
}

.manual-viewer {
  margin-top: 16px;
}

.manual-viewer.is-hidden,
.is-hidden {
  display: none !important;
}

.viewer-shell {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.viewer-eyebrow {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}

.viewer-toolbar h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.viewer-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.viewer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: #334155;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.viewer-btn:hover {
  background: #f8fafc;
}

.viewer-btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.viewer-btn.primary:hover {
  background: var(--primary-hover);
}

.viewer-frame-wrap {
  background: #f8fafc;
  padding: 0;
}

#manual-frame {
  display: block;
  width: 100%;
  min-height: 1200px;
  border: 0;
  background: #ffffff;
}

.hero {
  margin-bottom: 60px;
}

.hero .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.hero h2 {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 16px;
  line-height: 1.2;
  letter-spacing: -0.03em;
}
.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.hero-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.hero-grid .tile {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.hero-grid .tile .k {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}
.hero-grid .tile .v {
  display: block;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

.finder-card {
  padding: 24px;
}

.finder-toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.finder-input-wrap {
  position: relative;
  flex: 1;
}

.finder-input-wrap input {
  width: 100%;
  height: 48px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 0 16px 0 44px;
  font-size: 15px;
  outline: none;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.finder-input-wrap input:focus {
  border-color: #93c5fd;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
}

.finder-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  font-size: 16px;
}

.finder-reset {
  height: 48px;
  padding: 0 16px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  font-size: 14px;
  font-weight: 600;
  color: #475569;
  cursor: pointer;
}

.finder-reset:hover {
  background: #f8fafc;
}

.finder-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.finder-chip {
  border: 1px solid #dbeafe;
  background: #eff6ff;
  color: var(--primary);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.finder-chip:hover {
  background: #dbeafe;
}

.finder-meta {
  font-size: 13px;
  color: var(--muted);
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mode-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.mode-top {
  margin-bottom: 14px;
}

.mode-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-soft);
  margin-bottom: 12px;
}

.mode-card h4 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.mode-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}

.mode-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.mode-links a {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #334155;
  background: #ffffff;
  border: 1px solid #e2e8f0;
}

.mode-links a:hover {
  color: var(--primary);
  border-color: #bfdbfe;
  background: #eff6ff;
}

.mode-action {
  margin-top: 18px;
  width: 100%;
  height: 44px;
  border: 1px solid #dbeafe;
  border-radius: 12px;
  background: #eff6ff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.mode-action:hover {
  background: #dbeafe;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.doc-card {
  display: block;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.doc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: #c7d2fe;
}

.doc-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.doc-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-soft);
}

.doc-num {
  font-size: 12px;
  font-weight: 700;
  color: #94a3b8;
}

.doc-card h4 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.doc-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.doc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.doc-tags span {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #475569;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

.update-list {
  display: grid;
  gap: 16px;
}

.update-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
}

.update-version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
}

.update-body h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.update-body p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.all-doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.mini-doc {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.mini-doc:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  border-color: #cbd5e1;
}

.mini-doc-num {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 800;
  color: var(--primary);
  background: var(--primary-soft);
}

.mini-doc strong {
  display: block;
  font-size: 16px;
  line-height: 1.3;
  margin-bottom: 4px;
}

.mini-doc p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.is-hidden-by-search {
  display: none !important;
}

section {
  margin-top: 60px;
}
.sec-title {
  margin: 0 0 12px;
  font-size: 24px;
  font-weight: 700;
}
.sec-desc {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 16px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.step .num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

.step h4 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}
.step p {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.list {
  padding-left: 20px;
}
.list li {
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.65;
}
.list li strong {
  color: var(--text);
}

.info {
  padding: 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-top: 24px;
  border-left: 4px solid #cbd5e1;
  background: #f8fafc;
  color: #475569;
}

.foot {
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .toc {
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 24px;
  }
  .toc nav {
    display: flex;
    gap: 12px;
    overflow: auto;
  }
  .toc .group {
    margin-top: 0;
  }
  .main {
    padding: 40px 24px;
  }
  .viewer-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-grid,
  .step-grid,
  .doc-grid,
  .all-doc-grid,
  .mode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .hero h2 {
    font-size: 30px;
  }
  .hero p {
    font-size: 16px;
  }
  .hero-grid,
  .step-grid,
  .doc-grid,
  .all-doc-grid {
    grid-template-columns: 1fr;
  }
  .mode-grid {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 24px 20px;
  }
  .viewer-toolbar {
    padding: 20px;
  }
  .viewer-actions {
    width: 100%;
  }
  .viewer-btn {
    width: 100%;
  }
  .update-item {
    grid-template-columns: 1fr;
  }
  .finder-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}