/* ============================================
   Cyrene Documentation — Styles
   Inspired by docs.openclaw.ai design
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Colors - Light */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fb;
  --color-bg-tertiary: #f1f3f6;
  --color-surface: #ffffff;
  --color-border: #e2e6ed;
  --color-border-light: #eef1f5;
  --color-text: #1a1d26;
  --color-text-secondary: #5b6170;
  --color-text-tertiary: #8b91a0;
  --color-accent: #4f6ef7;
  --color-accent-hover: #3b5ae0;
  --color-accent-light: #eef1ff;
  --color-green: #22c55e;
  --color-green-bg: #f0fdf4;
  --color-orange: #f59e0b;
  --color-orange-bg: #fffbeb;
  --color-purple: #8b5cf6;
  --color-purple-bg: #f5f3ff;
  --color-code-bg: #f4f5f8;
  --color-code-border: #e2e6ed;
  --color-blockquote-border: #4f6ef7;
  --color-table-border: #e2e6ed;
  --color-table-stripe: #f8f9fb;
  --color-sidebar-bg: #f8f9fb;
  --color-sidebar-border: #e2e6ed;
  --color-card-bg: #ffffff;
  --color-card-border: #e2e6ed;
  --color-card-hover-border: #c4c9d4;
  --color-step-bg: #ffffff;
  --color-note-bg: #eef1ff;
  --color-note-border: #4f6ef7;
  --color-flow-node-bg: #ffffff;
  --color-flow-node-border: #d0d5e0;
  --color-tool-tag-bg: #eef1ff;
  --color-tool-tag-text: #4f6ef7;
  --color-link: #4f6ef7;
  --color-link-hover: #3b5ae0;
  --color-selection: #4f6ef733;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;

  /* Spacing */
  --sidebar-width: 280px;
  --content-max-width: 860px;
  --header-height: 0px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

[data-theme="dark"] {
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #1c2333;
  --color-surface: #161b22;
  --color-border: #30363d;
  --color-border-light: #21262d;
  --color-text: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-tertiary: #6e7681;
  --color-accent: #58a6ff;
  --color-accent-hover: #79c0ff;
  --color-accent-light: #1c2a40;
  --color-green: #3fb950;
  --color-green-bg: #0d2818;
  --color-orange: #d29922;
  --color-orange-bg: #1c1500;
  --color-purple: #bc8cff;
  --color-purple-bg: #1c1333;
  --color-code-bg: #161b22;
  --color-code-border: #30363d;
  --color-blockquote-border: #58a6ff;
  --color-table-border: #30363d;
  --color-table-stripe: #161b22;
  --color-sidebar-bg: #0d1117;
  --color-sidebar-border: #21262d;
  --color-card-bg: #161b22;
  --color-card-border: #30363d;
  --color-card-hover-border: #484f58;
  --color-step-bg: #161b22;
  --color-note-bg: #1c2a40;
  --color-note-border: #58a6ff;
  --color-flow-node-bg: #161b22;
  --color-flow-node-border: #30363d;
  --color-tool-tag-bg: #1c2a40;
  --color-tool-tag-text: #58a6ff;
  --color-link: #58a6ff;
  --color-link-hover: #79c0ff;
  --color-selection: #58a6ff55;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  min-height: 100vh;
  transition: background var(--transition-normal), color var(--transition-normal);
}

::selection {
  background: var(--color-selection);
}

/* --- Skip Link --- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: white;
  padding: 8px 16px;
  border-radius: 0 0 8px 8px;
  z-index: 1000;
  text-decoration: none;
  font-size: 14px;
}
.skip-link:focus {
  top: 0;
}

/* --- Top Bar --- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 200;
  display: flex;
  align-items: center;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.topbar-inner {
  display: flex;
  align-items: center;
  width: 100%;
  height: 100%;
  padding: 0 16px;
  gap: 12px;
}

.topbar-left {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.topbar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 16px;
  transition: color var(--transition-normal);
}
.topbar-logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.topbar-title {
  font-size: 16px;
  font-weight: 700;
}

.topbar-center {
  flex: 1;
  display: flex;
  justify-content: center;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

.topbar-search {
  position: relative;
  width: 100%;
}

.topbar-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.topbar-search-input {
  width: 100%;
  padding: 6px 10px 6px 32px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-secondary);
  color: var(--color-text);
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition-fast), background var(--transition-normal);
}
.topbar-search-input:focus {
  border-color: var(--color-accent);
  background: var(--color-surface);
}
.topbar-search-input::placeholder {
  color: var(--color-text-tertiary);
}

.topbar-search-hint {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-tertiary);
  font-size: 11px;
  font-family: var(--font-sans);
  line-height: 1.5;
  pointer-events: none;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.topbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}
.topbar-btn:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  text-decoration: none;
}
.topbar-btn-lang {
  width: auto;
  gap: 6px;
  padding: 0 8px;
  font-size: 13px;
  font-family: var(--font-sans);
}
.topbar-lang-text {
  white-space: nowrap;
}
.topbar-lang-text .lang-sep {
  color: var(--color-text-tertiary);
}
.topbar-lang-text [data-lang-code] {
  font-weight: 500;
  transition: color var(--transition-fast);
}
.topbar-lang-text .lang-label-active {
  color: var(--color-accent);
  font-weight: 600;
}
[data-theme="dark"] .topbar-btn .sun-icon { display: none; }
[data-theme="light"] .topbar-btn .moon-icon { display: none; }

/* Search results dropdown (top bar version) */
.topbar-search .search-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  min-width: 320px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  max-height: 320px;
  overflow-y: auto;
  display: none;
  z-index: 300;
}
.topbar-search .search-results.open {
  display: block;
}
.search-result-item {
  display: block;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.search-result-item:last-child {
  border-bottom: none;
}
.search-result-item:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  text-decoration: none;
}
.search-result-item .match {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 60px;
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - 60px);
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-sidebar-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: background var(--transition-normal), border-color var(--transition-normal), transform var(--transition-normal);
}

.sidebar-header {
  display: contents;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0 16px;
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}

.sidebar-nav:hover {
  scrollbar-color: var(--color-border) transparent;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}
.sidebar-nav::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.nav-list {
  list-style: none;
}

.nav-section-label {
  padding: 12px 24px 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-text-tertiary);
  transition: color var(--transition-normal);
}

.nav-item a {
  display: block;
  padding: 6px 24px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-left: 2px solid transparent;
}

.nav-item a:hover {
  color: var(--color-text);
  background: var(--color-bg-tertiary);
}

.nav-item.active a {
  color: var(--color-accent);
  background: var(--color-accent-light);
  border-left-color: var(--color-accent);
}

.sidebar-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--color-sidebar-border);
  transition: border-color var(--transition-normal);
}

.sidebar-version {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

[data-lang="zh"] [lang="en"],
[data-lang="en"] [lang="zh"] {
  display: none !important;
}

/* --- Main Content --- */
.content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 76px 64px 80px;
  max-width: calc(var(--sidebar-width) + var(--content-max-width));
  min-height: 100vh;
  transition: margin-left var(--transition-normal), background var(--transition-normal);
}

/* --- Pages --- */
.page {
  display: none;
  animation: fadeIn 0.25s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Page Header --- */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  transition: border-color var(--transition-normal);
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 8px;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* --- Hero Badges --- */
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.badge-blue { background: var(--color-accent-light); color: var(--color-accent); }
.badge-green { background: var(--color-green-bg); color: var(--color-green); }
.badge-orange { background: var(--color-orange-bg); color: var(--color-orange); }
.badge-purple { background: var(--color-purple-bg); color: var(--color-purple); }

/* --- Typography --- */
h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
}

p {
  margin-bottom: 16px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  transition: color var(--transition-normal);
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --- Lists --- */
ul, ol {
  margin: 0 0 20px 0;
  padding-left: 24px;
}

li {
  margin-bottom: 6px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Code --- */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-code-border);
  color: var(--color-text);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

pre, .code-block {
  margin: 16px 0 20px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-code-border);
  background: var(--color-code-bg);
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

.code-block pre {
  margin: 0;
  padding: 16px 20px;
  overflow-x: auto;
}

.code-block code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text);
}

/* --- Feature Grid --- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.feature-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 10px;
  padding: 20px;
  transition: all var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--color-card-hover-border);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}

.feature-card p {
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.6;
}

/* --- Steps --- */
.steps {
  margin: 24px 0;
}

.step {
  display: flex;
  gap: 16px;
  padding: 16px;
  margin-bottom: 12px;
  border-radius: 10px;
  background: var(--color-step-bg);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

.step-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  font-size: 14px;
  font-weight: 600;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.step p {
  margin: 0;
  font-size: 0.9rem;
}

.step-hint {
  font-size: 0.85rem !important;
  color: var(--color-text-tertiary) !important;
  margin-top: 6px !important;
}

/* --- Tables --- */
.table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--color-table-border);
  border-radius: 8px;
  transition: border-color var(--transition-normal);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th {
  text-align: left;
  padding: 10px 14px;
  background: var(--color-bg-secondary);
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-table-border);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: background var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-table-border);
  color: var(--color-text-secondary);
  transition: border-color var(--transition-normal), color var(--transition-normal);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) td {
  background: var(--color-table-stripe);
}

td code, th code {
  font-size: 0.85em;
}

/* --- Notes --- */
.note {
  padding: 14px 18px;
  border-radius: 8px;
  background: var(--color-note-bg);
  border-left: 4px solid var(--color-note-border);
  margin: 16px 0;
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

/* --- Limit List --- */
.limit-list {
  list-style: none;
  padding: 0;
}

.limit-list li {
  padding: 10px 14px;
  margin-bottom: 8px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

/* --- Flow Diagram --- */
.flow-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px;
  margin: 20px 0;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 12px;
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

.flow-diagram-horizontal {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-node {
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  border: 1.5px solid var(--color-flow-node-border);
  background: var(--color-flow-node-bg);
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

.flow-start {
  border-color: var(--color-green);
  color: var(--color-green);
}

.flow-phase {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.flow-end {
  border-color: var(--color-text-secondary);
  color: var(--color-text-secondary);
}

.flow-arrow {
  color: var(--color-text-tertiary);
  font-size: 1.2rem;
  line-height: 1;
}

.flow-branch {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-branch-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.flow-label {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
}

.flow-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  max-width: 500px;
}

.tool-tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-tool-tag-bg);
  color: var(--color-tool-tag-text);
  transition: background var(--transition-normal), color var(--transition-normal);
}

/* --- Mobile Menu Button --- */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 64px;
  left: 12px;
  z-index: 200;
  padding: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Sidebar Backdrop (mobile) --- */
.sidebar-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .content {
    padding: 76px 32px 64px;
  }
  .topbar-center {
    max-width: 320px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop.open {
    display: block;
    opacity: 1;
  }

  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .content {
    margin-left: 0;
    padding: 80px 20px 48px;
  }

  .topbar-lang-text {
    display: none;
  }
  .topbar-center {
    max-width: none;
  }
  .topbar-search-hint {
    display: none;
  }
  .topbar-title {
    display: none;
  }

  .page-header h1 {
    font-size: 1.6rem;
  }

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

  .flow-branch {
    flex-direction: column;
    align-items: center;
  }

  .flow-diagram-horizontal {
    flex-direction: column;
    align-items: center;
  }
}

/* --- Print --- */
@media print {
  .topbar, .sidebar, .mobile-menu-btn, .sidebar-backdrop {
    display: none !important;
  }
  .content {
    margin-left: 0;
    padding: 20px;
  }
  .page {
    display: block !important;
    page-break-after: always;
  }
  .page:last-child {
    page-break-after: auto;
  }
}