:root {
  --sidebar-width: 260px;
  --border-color: #cbd5e1;
  --link-color: #1e6091;
  --accent-color: #ff6b6b;
  --background: #f8fafc;
  --text-color: #2b2d42;
  --code-bg: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Tahoma, sans-serif;
  background: var(--background);
  color: var(--text-color);
  line-height: 1.6;
}

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

a:hover {
  color: var(--link-color);
  text-decoration: underline;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border-color);
}

.site-header .header-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--link-color);
}

.search-panel {
  position: relative;
  flex: 1 1 320px;
  max-width: 460px;
  margin-left: auto;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  display: flex;
  gap: 2rem;
}

.sidebar {
  width: var(--sidebar-width);
  border-right: 1px solid var(--border-color);
  padding-right: 1.5rem;
  position: sticky;
  top: 80px;
  align-self: flex-start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  background: #fff;
  border-radius: 8px;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.search-input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--link-color);
  box-shadow: 0 0 0 3px rgba(30, 96, 145, 0.18);
}

.search-hint {
  font-size: 0.75rem;
  color: #64748b;
  margin: 0;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 8px;
  max-height: 320px;
  overflow-y: auto;
  background: #fff;
  box-shadow: 0 6px 20px -12px rgba(15, 23, 42, 0.4);
  display: none;
  z-index: 10;
}

.search-results.active {
  display: block;
}

.search-result {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.search-result:last-child {
  border-bottom: none;
}

.search-result a {
  display: block;
  color: var(--link-color);
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.search-result p {
  margin: 0;
  font-size: 0.85rem;
  color: #475569;
}

.search-result mark {
  background: rgba(255, 193, 7, 0.4);
  padding: 0 0.15rem;
  border-radius: 2px;
}

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

.nav-list > li {
  margin-bottom: 0.75rem;
}

.nav-list a {
  color: inherit;
  font-weight: 500;
}

.nav-list li.active > a {
  color: var(--link-color);
}

.nav-list ul {
  margin-top: 0.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border-color);
}

.nav-list ul li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.content {
  flex: 1 1 0;
}

.main-content {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
  max-width: 900px;
  margin: 0 auto;
}

.main-content h1,
.main-content h2,
.main-content h3 {
  color: var(--link-color);
}

.main-content p {
  margin: 0 0 1rem;
}

.main-content ul,
.main-content ol {
  padding-left: 1.25rem;
}

.main-content code {
  font-family: "Source Code Pro", Menlo, monospace;
  background: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.main-content pre code {
  background: none;
  padding: 0;
  display: block;
}

.main-content pre {
  position: relative;
  background: #0f172a;
  color: #f1f5f9;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--link-color);
}

.copy-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  cursor: pointer;
}

.copy-button:hover {
  background: var(--link-color);
}

.lang-switch {
  position: sticky;
  top: 1rem;
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1.5rem;
  z-index: 10;
}

.lang-switch select {
  background: var(--link-color);
  color: #fff;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  border: none;
  font-size: 0.9rem;
  cursor: pointer;
}

.lang-switch select:hover {
  background: var(--accent-color);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.gallery img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
}

.doc-image {
  text-align: center;
  margin: 2rem 0;
}

.doc-image img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.doc-hero {
  margin: 2rem 0 2.5rem;
  padding: 1.5rem;
  border-left: 4px solid var(--link-color);
  background: #eef2ff;
  border-radius: 6px;
}

.doc-hero .lead {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
}

.scroll-table {
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 1.5rem;
}

.wide-table {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.wide-table table {
  min-width: 760px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

table th,
table td {
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  text-align: left;
}

table th {
  background: #eef2ff;
  color: var(--link-color);
}

blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--accent-color);
  background: #fff0f0;
  border-radius: 4px;
}

.site-footer {
  margin-top: 2rem;
  padding: 1.5rem 1rem 3rem;
  border-top: 1px solid var(--border-color);
  background: #fff;
}

.site-footer .container {
  max-width: 1200px;
  margin: 0 auto;
  color: #4b5563;
  font-size: 0.9rem;
}

@media (max-width: 1024px) {
  .page-wrapper {
    flex-direction: column;
  }

  .sidebar {
    position: static;
    max-height: none;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
  }

  .main-content {
    margin-top: 1rem;
  }
}

@media (max-width: 640px) {
  .main-content {
    padding: 1.5rem;
  }

  pre {
    font-size: 0.9rem;
  }
}