/**
 * SiteRooster — Design System
 * -----------------------------------------------------------------------------
 * Shared design tokens and primitive classes for the entire dashboard.
 * Derived from the Content Gap Analysis tab, which is the reference design.
 *
 * This file defines:
 *   1. :root tokens (colour, typography, radius, shadow, focus ring)
 *   2. Primitive classes prefixed `.sr-*`:
 *        - Page header  : .sr-page-header, .sr-page-title, .sr-page-subtitle
 *        - Cards        : .sr-card, .sr-card-header, .sr-card-title,
 *                         .sr-card-subtitle, .sr-card-body
 *        - Buttons      : .sr-btn, .sr-btn-primary, .sr-btn-danger,
 *                         .sr-btn-ghost, .sr-btn-lg, .sr-btn-sm
 *        - Icon action  : .sr-action-btn
 *        - Pills        : .sr-pill + semantic modifiers
 *        - Form control : .sr-input, .sr-select, .sr-textarea,
 *                         .sr-checkbox-label
 *        - Tables       : .sr-table-wrapper, .sr-table (+ thead/tbody rules)
 *        - Sub-tabs     : .sr-subtabs, .sr-subtab, .sr-subtab-badge
 *        - Pagination   : .sr-pagination, .sr-pag-info, .sr-pag-btn
 *        - Empty state  : .sr-empty (+ title/icon/text)
 *        - Utility      : .sr-eyebrow
 *
 * Load order: MUST be loaded before any other site stylesheet so tab-specific
 * CSS can still override when a tab has genuinely unique needs.
 * =============================================================================
 */

/* =============================================================================
   1. Tokens
   ============================================================================= */
:root {
    /* Brand accent — deep emerald */
    --sr-green:       #0ea5e9;
    --sr-green-600:   #0284c7;
    --sr-green-light: #38bdf8;
    --sr-green-50:    #f0f9ff;
    --sr-green-100:   #e0f2fe;

    /* Neutral surfaces */
    --sr-bg:          #f8fafc;
    --sr-card-bg:     #ffffff;
    --sr-surface-alt: #f9fafb;   /* table headers, row hover, pagination bg */

    /* Borders */
    --sr-border:         #e5e7eb;
    --sr-border-strong:  #d1d5db;

    /* Text */
    --sr-text:         #111827;
    --sr-text-muted:   #6b7280;
    --sr-text-subtle:  #9ca3af;

    /* Semantic — each colour paired with its tint background */
    --sr-danger:         #dc2626;
    --sr-danger-bg:      #fef2f2;
    --sr-danger-bg-100:  #fee2e2;
    --sr-danger-border:  #fecaca;

    --sr-warning:        #d97706;
    --sr-warning-bg:     #fef3c7;
    --sr-warning-text:   #92400e;

    --sr-info:           #2563eb;
    --sr-info-bg:        #dbeafe;

    --sr-purple:         #7c3aed;
    --sr-purple-bg:      #ede9fe;

    --sr-teal:           #0d9488;
    --sr-teal-bg:        #ccfbf1;

    /* Radius */
    --sr-radius-sm: 6px;   /* buttons, inputs */
    --sr-radius-md: 14px;  /* cards, table wrappers (Overview-spec) */
    --sr-radius-lg: 16px;  /* hero surfaces */

    /* Spacing scale (Overview-spec)
       Use these tokens instead of hardcoded px values for margins, padding,
       grid gaps, and section breaks. Keeps rhythm consistent across tabs. */
    --sr-space-xs:  8px;   /* tight gaps (pill gap, icon gap, row padding) */
    --sr-space-sm:  12px;  /* small grid gaps, compact padding */
    --sr-space-md:  16px;  /* default grid gap, default card padding top/bottom */
    --sr-space-lg:  20px;  /* card internal padding, card-to-card vertical gap */
    --sr-space-xl:  24px;  /* section-to-section gap, hero padding */
    --sr-space-2xl: 32px;  /* major layout breaks */

    /* Shadow */
    --sr-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --sr-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --sr-shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.06);

    /* Focus ring — applied as box-shadow alongside a coloured border */
    --sr-focus-ring: 0 0 0 3px var(--sr-green-100);

    /* Transition default */
    --sr-transition: 0.12s;
}

/* =============================================================================
   2. Page header
   ============================================================================= */
.sr-page-header {
    margin-bottom: 20px;
}
.sr-page-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0 0 6px 0;
    font-size: 24px;
    font-weight: 700;
    color: var(--sr-text);
}
.sr-page-title svg {
    width: 28px;
    height: 28px;
    color: var(--sr-green);
    flex-shrink: 0;
}
.sr-page-subtitle {
    color: var(--sr-text-muted);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
    max-width: 900px;
}

/* =============================================================================
   3. Cards
   ============================================================================= */
.sr-card {
    background: var(--sr-card-bg);
    border: 1px solid var(--sr-border);
    border-radius: var(--sr-radius-md);
    margin-bottom: var(--sr-space-lg);
}
.sr-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--sr-space-md) var(--sr-space-lg);
    border-bottom: 1px solid var(--sr-border);
}
.sr-card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--sr-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--sr-space-xs);
}
.sr-card-title svg {
    color: var(--sr-text-muted);
    width: 18px;
    height: 18px;
}
.sr-card-subtitle {
    font-size: 13px;
    color: var(--sr-text-muted);
    margin: 4px 0 0 0;
}
.sr-card-body {
    padding: var(--sr-space-lg);
}

/* =============================================================================
   4. Buttons
   ============================================================================= */
.sr-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--sr-radius-sm);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.2;
    border: 1px solid var(--sr-border-strong);
    background: #fff;
    color: var(--sr-text);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--sr-transition);
    white-space: nowrap;
}
.sr-btn:hover:not(:disabled) {
    background: var(--sr-bg);
}
.sr-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}
.sr-btn:disabled,
.sr-btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary */
.sr-btn-primary {
    background: var(--sr-green);
    color: #fff;
    border-color: var(--sr-green);
}
.sr-btn-primary:hover:not(:disabled) {
    background: var(--sr-green-600);
    border-color: var(--sr-green-600);
}

/* Danger */
.sr-btn-danger {
    background: #fff;
    color: var(--sr-danger);
    border-color: var(--sr-danger-border);
}
.sr-btn-danger:hover:not(:disabled) {
    background: var(--sr-danger-bg);
}

/* Ghost (no border, no background, muted text) */
.sr-btn-ghost {
    background: transparent;
    color: var(--sr-text-muted);
    border-color: transparent;
}
.sr-btn-ghost:hover:not(:disabled) {
    color: var(--sr-text);
    background: var(--sr-bg);
}

/* Size modifiers */
.sr-btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}
.sr-btn-sm svg {
    width: 12px;
    height: 12px;
}
.sr-btn-lg {
    padding: 10px 18px;
    font-size: 14px;
}
.sr-btn-lg svg {
    width: 16px;
    height: 16px;
}

/* =============================================================================
   5. Icon-only action button (compact 28x28 square)
   ============================================================================= */
.sr-action-btn {
    width: 28px;
    height: 28px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--sr-border-strong);
    border-radius: var(--sr-radius-sm);
    background: #fff;
    color: var(--sr-text-muted);
    cursor: pointer;
    transition: all var(--sr-transition);
    font-family: inherit;
}
.sr-action-btn:hover:not(:disabled) {
    background: var(--sr-bg);
    color: var(--sr-text);
}
.sr-action-btn.is-positive:hover:not(:disabled) {
    color: var(--sr-green);
    border-color: var(--sr-green);
}
.sr-action-btn.is-positive.is-active {
    color: var(--sr-green);
    border-color: var(--sr-green);
    background: var(--sr-green-50);
}
.sr-action-btn.is-destructive:hover:not(:disabled) {
    color: var(--sr-danger);
    border-color: var(--sr-danger);
}
.sr-action-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}
.sr-action-btn svg {
    width: 14px;
    height: 14px;
}

/* =============================================================================
   6. Pills / badges (Overview spec — fully rounded)
   ============================================================================= */
.sr-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    text-transform: capitalize;
    background: var(--sr-surface-alt);
    color: var(--sr-text-muted);
}

/* Semantic modifiers — {bg-tint, strong-colour} pairs */
.sr-pill.is-green  { background: var(--sr-green-100);  color: var(--sr-green); }
.sr-pill.is-red    { background: var(--sr-danger-bg-100); color: var(--sr-danger); }
.sr-pill.is-amber  { background: var(--sr-warning-bg); color: var(--sr-warning); }
.sr-pill.is-blue   { background: var(--sr-info-bg);    color: var(--sr-info); }
.sr-pill.is-purple { background: var(--sr-purple-bg);  color: var(--sr-purple); }
.sr-pill.is-teal   { background: var(--sr-teal-bg);    color: var(--sr-teal); }
.sr-pill.is-muted  { background: var(--sr-border);     color: var(--sr-text-muted); }

/* =============================================================================
   7. Form controls
   ============================================================================= */
.sr-input,
.sr-select,
.sr-textarea {
    padding: 6px 10px;
    border: 1px solid var(--sr-border-strong);
    border-radius: var(--sr-radius-sm);
    font-size: 13px;
    font-family: inherit;
    color: var(--sr-text);
    background: #fff;
    line-height: 1.4;
    box-sizing: border-box;
    transition: border-color var(--sr-transition), box-shadow var(--sr-transition);
}
.sr-input:focus,
.sr-select:focus,
.sr-textarea:focus {
    outline: none;
    border-color: var(--sr-green);
    box-shadow: var(--sr-focus-ring);
}

/* Textarea gets taller padding and vertical resize */
.sr-textarea {
    padding: 8px 10px;
    line-height: 1.5;
    resize: vertical;
    min-height: 70px;
}

/* Checkbox label pattern — checkbox + text, inline */
.sr-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--sr-text);
    cursor: pointer;
    user-select: none;
}
.sr-checkbox-label input[type="checkbox"] {
    accent-color: var(--sr-green);
    cursor: pointer;
}

/* =============================================================================
   8. Tables
   ============================================================================= */
.sr-table-wrapper {
    background: var(--sr-card-bg);
    border: 1px solid var(--sr-border);
    border-radius: var(--sr-radius-md);
    overflow: hidden;
    overflow-x: auto;
}
.sr-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.sr-table thead th {
    background: var(--sr-surface-alt);
    padding: 10px 12px;
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sr-text-muted);
    border-bottom: 1px solid var(--sr-border);
    white-space: nowrap;
}
.sr-table thead th.sortable {
    cursor: pointer;
    user-select: none;
    transition: color var(--sr-transition);
}
.sr-table thead th.sortable:hover {
    color: var(--sr-text);
}
.sr-table thead th.is-sort-active {
    color: var(--sr-green);
}
.sr-table thead th .sort-icon {
    display: inline-block;
    margin-left: 3px;
    font-size: 10px;
    opacity: 0.6;
}
.sr-table thead th.is-sort-active .sort-icon { opacity: 1; }

.sr-table tbody tr {
    border-bottom: 1px solid var(--sr-border);
    transition: background var(--sr-transition);
}
.sr-table tbody tr:last-child {
    border-bottom: none;
}
.sr-table tbody tr:hover {
    background: var(--sr-surface-alt);
}
.sr-table tbody td {
    padding: 12px;
    vertical-align: middle;
    color: var(--sr-text);
}

/* Numeric columns — right-aligned with tabular numerals */
.sr-table th.num,
.sr-table td.num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* =============================================================================
   9. Sub-tabs (Page Analysis style — white surface with subtle shadow,
      tab row attached at the bottom with rounded bottom corners, emerald
      2px underline + 600 weight on active)
   ============================================================================= */
.sr-subtabs {
    display: flex;
    gap: 0;
    background: #fff;
    border-radius: var(--sr-radius-lg);
    padding: 0 var(--sr-space-xl);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    margin-bottom: var(--sr-space-xl);
}
/* Variant: when the tab bar attaches to a card directly above, flatten the
   top corners and add a subtle top border so the two surfaces read as one. */
.sr-subtabs.sr-subtabs-attached {
    border-top: 1px solid var(--sr-border);
    border-radius: 0 0 var(--sr-radius-lg) var(--sr-radius-lg);
}
.sr-subtab {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 14px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    color: var(--sr-text-subtle);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    transition: color var(--sr-transition);
}
.sr-subtab:hover {
    color: var(--sr-text-muted);
}
.sr-subtab.is-active,
.sr-subtab.active {
    color: var(--sr-green);
    border-bottom-color: var(--sr-green);
    font-weight: 600;
}
.sr-subtab svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}
.sr-subtab-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--sr-border);
    color: var(--sr-text);
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}
.sr-subtab.is-active .sr-subtab-badge,
.sr-subtab.active .sr-subtab-badge {
    background: var(--sr-green-100);
    color: var(--sr-green);
}

/* =============================================================================
   10. Pagination (sits at the bottom of a table wrapper)
   ============================================================================= */
.sr-pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--sr-surface-alt);
    border-top: 1px solid var(--sr-border);
    font-size: 13px;
}
.sr-pag-info {
    color: var(--sr-text-muted);
}
.sr-pag-nav {
    display: flex;
    gap: 4px;
}
.sr-pag-btn {
    padding: 5px 10px;
    border: 1px solid var(--sr-border-strong);
    background: #fff;
    border-radius: 4px;
    font-family: inherit;
    font-size: 12px;
    color: var(--sr-text);
    min-width: 30px;
    cursor: pointer;
    transition: background var(--sr-transition);
}
.sr-pag-btn:hover:not(:disabled) {
    background: var(--sr-bg);
}
.sr-pag-btn.is-active {
    background: var(--sr-green);
    border-color: var(--sr-green);
    color: #fff;
}
.sr-pag-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* =============================================================================
   11. Empty state
   Base is minimal (centred padding + typography) so callers can wrap in a
   .sr-card when they want a bordered surface. Use .is-dashed for the
   "coming soon" placeholder variant which brings its own dashed border.
   ============================================================================= */
.sr-empty-state {
    text-align: center;
    padding: 48px 24px;
}
.sr-empty-state.is-large,
.sr-empty-state-large {
    padding: 64px 40px;
}
.sr-empty-state.is-dashed {
    border: 2px dashed var(--sr-border);
    border-radius: var(--sr-radius-md);
    background: var(--sr-card-bg);
}
.sr-empty-state-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    color: var(--sr-text-subtle);
    display: block;
}
.sr-empty-state h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--sr-text);
    margin: 0 0 8px 0;
}
.sr-empty-state p {
    color: var(--sr-text-muted);
    font-size: 14px;
    line-height: 1.6;
    max-width: 480px;
    margin: 0 auto 16px;
}

/* =============================================================================
   12. Utility — "eyebrow" label (uppercase small caps above a value)
   ============================================================================= */
.sr-eyebrow {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sr-text-muted);
}

/* =============================================================================
   13. Layout helpers — consistent rhythm across tabs
   Use .sr-section for anything grouping related cards/content; gives a
   standard 24px gap between sections regardless of tab.
   Use .sr-grid (+ modifier) for card grids with the standard 16px gap.
   ============================================================================= */
.sr-section {
    margin-bottom: var(--sr-space-xl);
}
.sr-section:last-child {
    margin-bottom: 0;
}

.sr-grid {
    display: grid;
    gap: var(--sr-space-md);
}
.sr-grid-2 { grid-template-columns: repeat(2, 1fr); }
.sr-grid-3 { grid-template-columns: repeat(3, 1fr); }
.sr-grid-4 { grid-template-columns: repeat(4, 1fr); }
.sr-grid-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 1100px) {
    .sr-grid-4, .sr-grid-6 { grid-template-columns: repeat(3, 1fr); }
    .sr-grid-3             { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
    .sr-grid-2, .sr-grid-3, .sr-grid-4, .sr-grid-6 {
        grid-template-columns: 1fr;
    }
}

/* =============================================================================
   13. Stats grid + stat cards (coloured accent bar, large value)

   Layout:   .sr-stats-grid + .sr-stats-grid-2 / -3 / -4 / -5
   Card:     .sr-stat-card with optional accent modifier:
                .is-emerald  /  .is-blue  /  .is-amber  /  .is-red
             Legacy status classes supported for JS-driven state:
                .status-good  /  .status-warning  /  .status-bad
   Contents: .sr-stat-value, .sr-stat-label, .sr-stat-sublabel
   ============================================================================= */
.sr-stats-grid {
    display: grid;
    gap: var(--sr-space-md);
    margin-bottom: var(--sr-space-xl);
}
.sr-stats-grid-2 { grid-template-columns: repeat(2, 1fr); }
.sr-stats-grid-3 { grid-template-columns: repeat(3, 1fr); }
.sr-stats-grid-4 { grid-template-columns: repeat(4, 1fr); }
.sr-stats-grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1200px) {
    .sr-stats-grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
    .sr-stats-grid-3,
    .sr-stats-grid-4,
    .sr-stats-grid-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .sr-stats-grid-3,
    .sr-stats-grid-4,
    .sr-stats-grid-5 { grid-template-columns: 1fr; }
}

.sr-stat-card {
    background: #fff;
    border: 1px solid var(--sr-border);
    border-radius: 10px;
    padding: 18px 20px;
    position: relative;
    overflow: hidden;
}
.sr-stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--sr-border-strong);
}
.sr-stat-card.is-emerald::after,
.sr-stat-card.status-good::after    { background: var(--sr-green); }
.sr-stat-card.is-blue::after        { background: #2563eb; }
.sr-stat-card.is-amber::after,
.sr-stat-card.status-warning::after { background: #f59e0b; }
.sr-stat-card.is-red::after,
.sr-stat-card.status-bad::after     { background: #ef4444; }

.sr-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--sr-text);
    line-height: 1.2;
}
.sr-stat-card.is-emerald .sr-stat-value,
.sr-stat-card.status-good .sr-stat-value    { color: var(--sr-green); }
.sr-stat-card.is-blue .sr-stat-value        { color: #2563eb; }
.sr-stat-card.is-amber .sr-stat-value,
.sr-stat-card.status-warning .sr-stat-value { color: #f59e0b; }
.sr-stat-card.is-red .sr-stat-value,
.sr-stat-card.status-bad .sr-stat-value     { color: #ef4444; }

.sr-stat-label {
    font-size: 12px;
    color: var(--sr-text-muted);
    margin-top: 2px;
    font-weight: 500;
}
.sr-stat-sublabel {
    font-size: 11px;
    color: var(--sr-text-subtle);
    margin-top: 6px;
}

/* Status dot used inside the value cell (Overview status card). */
.sr-stat-card .sr-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
    background: var(--sr-border-strong);
    vertical-align: middle;
}
.sr-stat-card .sr-status-dot.online  { background: var(--sr-green); animation: sr-ai-pulse 2s infinite; }
.sr-stat-card .sr-status-dot.offline { background: #ef4444; }

/* =============================================================================
   14. Utility — loading spin (applied to SVG icons mid-action)
   ============================================================================= */
@keyframes sr-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
.sr-spin {
    animation: sr-spin 1s linear infinite;
}