adrscope 0.3.0

/* ADRScope Styles - Zero dependencies, vanilla CSS */

/* ============================================================================
   CSS Variables (Design Tokens)
   ============================================================================ */
:root {
    /* Colors - Light Theme */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-bg: #eff6ff;

    /* Status Colors */
    --status-proposed: #f59e0b;
    --status-proposed-bg: #fef3c7;
    --status-accepted: #10b981;
    --status-accepted-bg: #d1fae5;
    --status-deprecated: #ef4444;
    --status-deprecated-bg: #fee2e2;
    --status-superseded: #6b7280;
    --status-superseded-bg: #f3f4f6;

    /* Layout */
    --sidebar-width: 280px;
    --header-height: 60px;
    --footer-height: 40px;
    --border-radius: 6px;
    --border-radius-lg: 8px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-hover: #475569;
    --color-primary: #60a5fa;
    --color-primary-hover: #93c5fd;
    --color-primary-bg: #1e3a5f;

    --status-proposed-bg: #422006;
    --status-accepted-bg: #064e3b;
    --status-deprecated-bg: #450a0a;
    --status-superseded-bg: #1f2937;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

/* Auto theme - respects system preference */
@media (prefers-color-scheme: dark) {
    [data-theme="auto"] {
        --color-bg: #0f172a;
        --color-bg-secondary: #1e293b;
        --color-bg-tertiary: #334155;
        --color-text: #f1f5f9;
        --color-text-secondary: #94a3b8;
        --color-text-muted: #64748b;
        --color-border: #334155;
        --color-border-hover: #475569;
        --color-primary: #60a5fa;
        --color-primary-hover: #93c5fd;
        --color-primary-bg: #1e3a5f;

        --status-proposed-bg: #422006;
        --status-accepted-bg: #064e3b;
        --status-deprecated-bg: #450a0a;
        --status-superseded-bg: #1f2937;
    }
}

/* ============================================================================
   Base Styles
   ============================================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
}

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

a:hover {
    text-decoration: underline;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input, select {
    font-family: inherit;
    font-size: inherit;
}

table {
    border-collapse: collapse;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* ============================================================================
   Header
   ============================================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-center {
    flex: 1;
    max-width: 600px;
    margin: 0 1rem;
}

.logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

/* Search */
.search-container {
    position: relative;
    width: 100%;
}

#search {
    width: 100%;
    padding: 0.5rem 2.5rem 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#search:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

#search::placeholder {
    color: var(--color-text-muted);
}

.search-shortcut {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.125rem 0.375rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

/* View Toggle */
.view-toggle {
    display: flex;
    gap: 0.25rem;
    padding: 0.25rem;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.view-btn:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.view-btn.active {
    background: var(--color-bg);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.sun-icon { display: block; }
.moon-icon { display: none; }

[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

@media (prefers-color-scheme: dark) {
    [data-theme="auto"] .sun-icon { display: none; }
    [data-theme="auto"] .moon-icon { display: block; }
}

/* ============================================================================
   Main Layout
   ============================================================================ */
.main-container {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

/* ============================================================================
   Sidebar
   ============================================================================ */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: var(--footer-height);
    width: var(--sidebar-width);
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-header h2 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.clear-filters {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--color-primary);
}

.clear-filters:hover {
    background: var(--color-primary-bg);
}

.filter-section {
    margin-bottom: 1.25rem;
}

.filter-section h3 {
    margin-bottom: 0.5rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Status Filters */
.status-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    border: 1px solid transparent;
    border-radius: 9999px;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.status-chip.status-proposed {
    background: var(--status-proposed-bg);
    color: var(--status-proposed);
}

.status-chip.status-accepted {
    background: var(--status-accepted-bg);
    color: var(--status-accepted);
}

.status-chip.status-deprecated {
    background: var(--status-deprecated-bg);
    color: var(--status-deprecated);
}

.status-chip.status-superseded {
    background: var(--status-superseded-bg);
    color: var(--status-superseded);
}

.status-chip:hover {
    filter: brightness(0.95);
}

.status-chip.active {
    border-color: currentColor;
}

.status-chip .count {
    font-weight: 600;
}

/* Filter Select */
.filter-select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    max-height: 150px;
    overflow-y: auto;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 9999px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tag-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tag-chip.active {
    background: var(--color-primary-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Date Filters */
.date-filters {
    display: flex;
    gap: 0.5rem;
}

.date-filters input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
}

.date-filters input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ============================================================================
   Content Area
   ============================================================================ */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 1rem;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.result-count {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-controls label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.sort-select {
    padding: 0.375rem 0.5rem;
    font-size: 0.8125rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
}

/* View Containers */
.view-container {
    min-height: 400px;
}

/* ============================================================================
   List View (Table)
   ============================================================================ */
.adr-table {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.adr-table th,
.adr-table td {
    padding: 0.75rem 1rem;
    text-align: left;
}

.adr-table thead {
    background: var(--color-bg-secondary);
}

.adr-table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.adr-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.adr-table th.sortable:hover {
    color: var(--color-text);
}

.adr-table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
    cursor: pointer;
}

.adr-table tbody tr:last-child {
    border-bottom: none;
}

.adr-table tbody tr:hover {
    background: var(--color-bg-secondary);
}

.adr-table tbody tr.selected {
    background: var(--color-primary-bg);
}

.adr-table .title-cell {
    font-weight: 500;
    color: var(--color-text);
}

.adr-table .title-cell:hover {
    color: var(--color-primary);
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.status-badge.status-proposed {
    background: var(--status-proposed-bg);
    color: var(--status-proposed);
}

.status-badge.status-accepted {
    background: var(--status-accepted-bg);
    color: var(--status-accepted);
}

.status-badge.status-deprecated {
    background: var(--status-deprecated-bg);
    color: var(--status-deprecated);
}

.status-badge.status-superseded {
    background: var(--status-superseded-bg);
    color: var(--status-superseded);
}

/* Category Badge */
.category-badge {
    display: inline-flex;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    background: var(--color-bg-tertiary);
    border-radius: 4px;
    color: var(--color-text-secondary);
}

/* Date Cell */
.date-cell {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.date-cell.recent {
    color: var(--status-accepted);
}

/* ============================================================================
   Card View
   ============================================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
}

.adr-card {
    position: relative;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.adr-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.adr-card.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.card-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.card-title {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    padding-right: 5rem;
}

.card-description {
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.card-tag {
    padding: 0.125rem 0.375rem;
    font-size: 0.6875rem;
    background: var(--color-bg-tertiary);
    border-radius: 4px;
    color: var(--color-text-muted);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ============================================================================
   Timeline View
   ============================================================================ */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-group {
    margin-bottom: 2rem;
}

.timeline-month {
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.timeline-item {
    position: relative;
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.75rem;
    top: 1rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
}

.timeline-item.status-proposed::before { border-color: var(--status-proposed); }
.timeline-item.status-accepted::before { border-color: var(--status-accepted); }
.timeline-item.status-deprecated::before { border-color: var(--status-deprecated); }
.timeline-item.status-superseded::before { border-color: var(--status-superseded); }

.timeline-item:hover {
    border-color: var(--color-border-hover);
}

.timeline-item.selected {
    border-color: var(--color-primary);
}

.timeline-title {
    font-weight: 500;
    color: var(--color-text);
}

.timeline-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ============================================================================
   Graph View
   ============================================================================ */
.graph-container {
    position: relative;
    height: 600px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

#graph-canvas {
    width: 100%;
    height: 100%;
}

.graph-node {
    cursor: pointer;
}

.graph-legend {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    padding: 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
}

/* ============================================================================
   Detail Panel
   ============================================================================ */
.detail-panel {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: var(--footer-height);
    width: 50%;
    max-width: 800px;
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
    z-index: 50;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.detail-panel:not(.hidden) {
    transform: translateX(0);
}

.detail-header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 10;
}

.close-detail {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: none;
    border-radius: var(--border-radius);
    background: transparent;
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.close-detail:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.detail-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.detail-content {
    padding: 1.5rem;
}

.detail-title {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.detail-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.meta-value {
    font-size: 0.875rem;
    color: var(--color-text);
}

.detail-body {
    font-size: 0.9375rem;
    line-height: 1.7;
}

.detail-body h1 { font-size: 1.5rem; margin: 1.5rem 0 1rem; }
.detail-body h2 { font-size: 1.25rem; margin: 1.25rem 0 0.75rem; }
.detail-body h3 { font-size: 1.125rem; margin: 1rem 0 0.5rem; }
.detail-body h4 { font-size: 1rem; margin: 1rem 0 0.5rem; }

.detail-body p { margin: 0 0 1rem; }

.detail-body ul, .detail-body ol {
    margin: 0 0 1rem;
    padding-left: 1.5rem;
}

.detail-body li { margin-bottom: 0.375rem; }

.detail-body code {
    padding: 0.125rem 0.375rem;
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

.detail-body pre {
    margin: 0 0 1rem;
    padding: 1rem;
    overflow-x: auto;
    background: var(--color-bg-tertiary);
    border-radius: var(--border-radius);
}

.detail-body pre code {
    padding: 0;
    background: none;
}

.detail-body table {
    margin: 0 0 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.detail-body th, .detail-body td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.detail-body th {
    background: var(--color-bg-secondary);
    font-weight: 600;
    text-align: left;
}

.detail-body blockquote {
    margin: 0 0 1rem;
    padding: 0.5rem 1rem;
    border-left: 4px solid var(--color-primary);
    background: var(--color-bg-secondary);
}

.detail-related {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.detail-related h3 {
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.related-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.related-link {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.related-link:hover {
    background: var(--color-bg-tertiary);
    text-decoration: none;
}

/* ============================================================================
   Footer
   ============================================================================ */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem 0 calc(var(--sidebar-width) + 1rem);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.footer a {
    color: var(--color-text-secondary);
}

.footer a:hover {
    color: var(--color-primary);
}

/* ============================================================================
   Modal
   ============================================================================ */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
}

.modal-content {
    max-width: 400px;
    width: 90%;
    padding: 1.5rem;
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.modal h2 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.shortcuts-table {
    width: 100%;
    margin-bottom: 1rem;
}

.shortcuts-table td {
    padding: 0.5rem 0;
}

.shortcuts-table td:first-child {
    width: 80px;
}

kbd {
    display: inline-block;
    padding: 0.125rem 0.375rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.close-modal {
    width: 100%;
    padding: 0.625rem;
    border: none;
    border-radius: var(--border-radius);
    background: var(--color-primary);
    color: white;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.close-modal:hover {
    background: var(--color-primary-hover);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: 60;
    }

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

    .content {
        margin-left: 0;
    }

    .footer {
        padding-left: 1rem;
    }

    .detail-panel {
        width: 100%;
        max-width: none;
    }
}

@media (max-width: 768px) {
    .header-center {
        display: none;
    }

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

    .detail-meta {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Accessibility
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}