/* ========== API Documentation Hub Styles ========== */
:root {
    --ad-bg: #f8fafc;
    --ad-card-bg: #ffffff;
    --ad-text: #1e293b;
    --ad-text-muted: #64748b;
    --ad-border: #e2e8f0;
    --ad-primary: #2563eb;
    --ad-primary-light: #dbeafe;
    --ad-success: #16a34a;
    --ad-success-light: #dcfce7;
    --ad-warning: #d97706;
    --ad-warning-light: #fef3c7;
    --ad-danger: #dc2626;
    --ad-danger-light: #fee2e2;
    --ad-code-bg: #f1f5f9;
    --ad-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --ad-radius: 8px;
}

[data-theme="dark"] {
    --ad-bg: #0f172a;
    --ad-card-bg: #1e293b;
    --ad-text: #e2e8f0;
    --ad-text-muted: #94a3b8;
    --ad-border: #334155;
    --ad-primary: #3b82f6;
    --ad-primary-light: #1e3a5f;
    --ad-success: #22c55e;
    --ad-success-light: #14532d;
    --ad-warning: #f59e0b;
    --ad-warning-light: #78350f;
    --ad-danger: #ef4444;
    --ad-danger-light: #7f1d1d;
    --ad-code-bg: #0f172a;
    --ad-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

.ad-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--ad-text);
}

/* Header */
.ad-header {
    margin-bottom: 24px;
}
.ad-header h1 {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 8px 0;
}
.ad-header p {
    color: var(--ad-text-muted);
    margin: 0;
    font-size: 14px;
}

/* Search & Filter Bar */
.ad-toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
}
.ad-search {
    flex: 1;
    min-width: 200px;
    padding: 10px 14px;
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    font-size: 14px;
    background: var(--ad-card-bg);
    color: var(--ad-text);
    outline: none;
    transition: border-color 0.2s;
}
.ad-search:focus {
    border-color: var(--ad-primary);
}
.ad-filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    background: var(--ad-card-bg);
    color: var(--ad-text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.ad-filter-btn:hover {
    border-color: var(--ad-primary);
    color: var(--ad-primary);
}
.ad-filter-btn.active {
    background: var(--ad-primary);
    color: #fff;
    border-color: var(--ad-primary);
}

/* Summary Cards */
.ad-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.ad-stat-card {
    background: var(--ad-card-bg);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    padding: 16px;
    box-shadow: var(--ad-shadow);
}
.ad-stat-card .ad-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--ad-primary);
}
.ad-stat-card .ad-stat-label {
    font-size: 12px;
    color: var(--ad-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* API Cards */
.ad-api-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.ad-api-card {
    background: var(--ad-card-bg);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    box-shadow: var(--ad-shadow);
    overflow: hidden;
    transition: border-color 0.2s;
}
.ad-api-card:hover {
    border-color: var(--ad-primary);
}

/* Card Header */
.ad-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    user-select: none;
    gap: 12px;
}
.ad-card-header:hover {
    background: rgba(37, 99, 235, 0.03);
}
[data-theme="dark"] .ad-card-header:hover {
    background: rgba(59, 130, 246, 0.05);
}
.ad-card-title-area {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}
.ad-card-title {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
}
.ad-card-file {
    font-size: 12px;
    color: var(--ad-text-muted);
    font-family: 'SFMono-Regular', Consolas, monospace;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.ad-card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Badges */
.ad-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}
.ad-badge-stable {
    background: var(--ad-success-light);
    color: var(--ad-success);
}
.ad-badge-internal {
    background: var(--ad-warning-light);
    color: var(--ad-warning);
}
.ad-badge-fn-count {
    background: var(--ad-primary-light);
    color: var(--ad-primary);
}
.ad-badge-consumers {
    background: var(--ad-code-bg);
    color: var(--ad-text-muted);
}

/* Chevron */
.ad-chevron {
    width: 20px;
    height: 20px;
    transition: transform 0.2s;
    color: var(--ad-text-muted);
    flex-shrink: 0;
}
.ad-api-card.expanded .ad-chevron {
    transform: rotate(180deg);
}

/* Card Body (expandable) */
.ad-card-body {
    display: none;
    padding: 0 20px 20px;
    border-top: 1px solid var(--ad-border);
}
.ad-api-card.expanded .ad-card-body {
    display: block;
}

/* Sections inside card body */
.ad-section {
    margin-top: 16px;
}
.ad-section-title {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--ad-text-muted);
    margin-bottom: 8px;
}

/* Purpose text */
.ad-purpose {
    font-size: 14px;
    color: var(--ad-text);
    line-height: 1.5;
    margin: 12px 0 0;
}

/* Code block */
.ad-code {
    background: var(--ad-code-bg);
    border: 1px solid var(--ad-border);
    border-radius: 6px;
    padding: 10px 14px;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px;
    overflow-x: auto;
    color: var(--ad-text);
}

/* Function table */
.ad-fn-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.ad-fn-table th {
    text-align: left;
    padding: 8px 12px;
    background: var(--ad-code-bg);
    border-bottom: 2px solid var(--ad-border);
    font-weight: 600;
    color: var(--ad-text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.ad-fn-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--ad-border);
    vertical-align: top;
}
.ad-fn-table tr:last-child td {
    border-bottom: none;
}
.ad-fn-name {
    font-family: 'SFMono-Regular', Consolas, monospace;
    color: var(--ad-primary);
    font-weight: 500;
    white-space: nowrap;
}
.ad-fn-params {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px;
    color: var(--ad-text-muted);
}
.ad-fn-returns {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px;
}

/* Consumer chips */
.ad-consumers {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.ad-consumer-chip {
    display: inline-flex;
    padding: 4px 10px;
    background: var(--ad-code-bg);
    border: 1px solid var(--ad-border);
    border-radius: 14px;
    font-size: 12px;
    color: var(--ad-text);
}

/* Improvement warnings */
.ad-improvement {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 14px;
    background: var(--ad-warning-light);
    border: 1px solid rgba(217, 119, 6, 0.2);
    border-radius: 6px;
    font-size: 13px;
    color: var(--ad-text);
    margin-top: 8px;
}
.ad-improvement-icon {
    flex-shrink: 0;
    margin-top: 1px;
}

/* Dependency Graph */
.ad-dep-section {
    margin-top: 32px;
}
.ad-dep-section h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 16px 0;
}
.ad-dep-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}
.ad-dep-card {
    background: var(--ad-card-bg);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    padding: 12px 16px;
}
.ad-dep-project {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 6px;
}
.ad-dep-deps {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}
.ad-dep-arrow {
    color: var(--ad-text-muted);
    font-size: 12px;
    margin: 0 2px;
}
.ad-dep-tag {
    display: inline-flex;
    padding: 2px 8px;
    background: var(--ad-primary-light);
    border-radius: 10px;
    font-size: 11px;
    color: var(--ad-primary);
    font-weight: 500;
}

/* Missing Helpers */
.ad-missing-section {
    margin-top: 32px;
}
.ad-missing-section h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 16px 0;
}
.ad-missing-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.ad-missing-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--ad-card-bg);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    font-size: 13px;
}
.ad-missing-project {
    font-weight: 600;
    min-width: 100px;
}
.ad-missing-suggestion {
    color: var(--ad-text-muted);
}

/* Middleware Section */
.ad-middleware-section {
    margin-top: 32px;
}
.ad-middleware-section h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 16px 0;
}
.ad-mw-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}
.ad-mw-card {
    background: var(--ad-card-bg);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius);
    padding: 14px 16px;
}
.ad-mw-file {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px;
    color: var(--ad-primary);
    font-weight: 500;
}
.ad-mw-purpose {
    font-size: 13px;
    color: var(--ad-text-muted);
    margin-top: 4px;
}
.ad-mw-type {
    display: inline-flex;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    margin-left: 8px;
}
.ad-mw-type-php {
    background: #e0e7ff;
    color: #4338ca;
}
.ad-mw-type-js {
    background: #fef3c7;
    color: #92400e;
}
[data-theme="dark"] .ad-mw-type-php {
    background: #312e81;
    color: #a5b4fc;
}
[data-theme="dark"] .ad-mw-type-js {
    background: #78350f;
    color: #fcd34d;
}

/* No results */
.ad-no-results {
    text-align: center;
    padding: 48px 24px;
    color: var(--ad-text-muted);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .ad-container { padding: 16px; }
    .ad-card-header { padding: 12px 16px; }
    .ad-card-body { padding: 0 16px 16px; }
    .ad-card-file { display: none; }
    .ad-summary { grid-template-columns: repeat(2, 1fr); }
    .ad-fn-table { font-size: 12px; }
    .ad-fn-table th, .ad-fn-table td { padding: 6px 8px; }
    .ad-dep-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .ad-summary { grid-template-columns: 1fr; }
    .ad-toolbar { flex-direction: column; }
    .ad-search { min-width: 100%; }
}