/* 变量 */
:root {
  --sidebar-width: 260px;
  --header-height: 60px;
  --color-bg: #0f1419;
  --color-sidebar: #161d26;
  --color-border: #2d3748;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-code-bg: #1e293b;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

.layout {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo-desc {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.token-input-wrap {
  margin-top: 16px;
}

.token-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.token-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--color-text);
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-sizing: border-box;
}

.token-input::placeholder {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.token-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.nav {
  padding: 16px 0;
}

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

.nav-item {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 12px 20px;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(59, 130, 246, 0.08);
}

.nav-link.active {
  color: var(--color-accent);
  background: rgba(59, 130, 246, 0.12);
  border-left-color: var(--color-accent);
}

/* 分组（可展开收起） */
.nav-group {
  margin: 0;
}

.nav-group-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}

.nav-group-toggle:hover {
  color: var(--color-text);
  background: rgba(59, 130, 246, 0.08);
}

.nav-group-arrow {
  display: inline-block;
  width: 0;
  height: 0;
  margin-right: 10px;
  border-left: 5px solid currentColor;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 0.2s ease;
}

.nav-group-toggle.expanded .nav-group-arrow {
  transform: rotate(90deg);
}

.nav-group-title {
  flex: 1;
}

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

.nav-sublink {
  padding-left: 47px; /* 20 + 10(arrow margin) + 17 indent */
}

/* 主内容区 */
.content {
  flex: 1;
  padding: 40px 48px 60px;
  max-width: 900px;
}

.api-detail {
  min-height: 100%;
}

.welcome {
  padding-top: 20px;
}

.welcome h2 {
  margin: 0 0 16px;
  font-size: 1.75rem;
  font-weight: 600;
}

.welcome p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.hidden {
  display: none !important;
}

/* API 内容 */
.api-content h2 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 600;
}

.api-desc {
  margin: 0 0 24px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.section {
  margin-bottom: 32px;
}

.section-title {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* 安装说明 */
.install-box {
  background: var(--color-code-bg);
  border-radius: 8px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #7dd3fc;
}

/* 代码块 */
.code-block {
  background: var(--color-code-bg);
  border-radius: 8px;
  overflow: hidden;
  margin: 0;
}

.code-block pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: #e2e8f0;
}

/* 参数表 */
.params-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.params-table th,
.params-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.params-table th {
  color: var(--color-text-muted);
  font-weight: 500;
}

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

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

.params-table code {
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}

/* 响应式 */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

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

  .nav-list {
    display: block;
    padding: 0 16px 16px;
  }

  .nav-group {
    margin-bottom: 4px;
  }

  .nav-group-toggle {
    padding: 8px 12px;
    border-radius: 6px;
  }

  .nav-sublink {
    padding: 8px 12px 8px 35px;
  }

  .nav-link {
    padding: 8px 12px;
    border-radius: 6px;
    border-left: none;
  }

  .nav-link.active {
    border-left: none;
    border-radius: 6px;
  }

  .content {
    padding: 24px 20px 40px;
  }
}