/* University of Saskatchewan Branding */
:root {
    --usask-green: #006633;
    --usask-green-dark: #005528;
    --usask-gold: #FFCC00;
    --usask-gold-light: #FFE066;
    --text-primary: #333333;
    --text-secondary: #666666;
    --background: #FFFFFF;
    --background-alt: #F8F9FA;
    --border-color: #E0E0E0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--background);
    line-height: 1.6;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden {
    display: none !important;
}

/* Header */
.site-header {
    background: var(--usask-green);
    color: var(--background);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.site-header h1 {
    margin: 0 0 var(--spacing-xs);
    font-size: 2.5rem;
    font-weight: 700;
}

.site-header .subtitle {
    margin: 0 0 var(--spacing-sm);
    font-size: 1.25rem;
    color: var(--usask-gold);
    font-weight: 500;
}

.site-header .description {
    margin: 0;
    font-size: 1rem;
    opacity: 0.9;
}

/* Search Section */
.search-section {
    margin: var(--spacing-lg) 0;
}

.search-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

#search-input {
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1.125rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.2s, box-shadow 0.2s;
}

#search-input:focus {
    outline: none;
    border-color: var(--usask-green);
    box-shadow: 0 0 0 3px rgba(0, 102, 51, 0.2);
}

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

/* Statistics Section */
.stats-section {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    min-width: 150px;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--usask-green);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* General Sources Section */
.general-sources-section {
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--background-alt);
    border: none;
    cursor: pointer;
    text-align: left;
    gap: var(--spacing-sm);
    transition: background-color 0.2s;
}

.section-header:hover {
    background: var(--border-color);
}

.section-header h2 {
    margin: 0;
    font-size: 1.25rem;
    flex-grow: 1;
}

.toggle-icon {
    width: 24px;
    height: 24px;
    position: relative;
}

.toggle-icon::before,
.toggle-icon::after {
    content: '';
    position: absolute;
    background: var(--text-secondary);
    transition: transform 0.2s;
}

.toggle-icon::before {
    width: 12px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.toggle-icon::after {
    width: 2px;
    height: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.section-header[aria-expanded="true"] .toggle-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.section-content {
    padding: var(--spacing-md);
    background: var(--background);
}

.section-content.collapsed {
    display: none;
}

.section-description {
    margin: 0 0 var(--spacing-md);
    color: var(--text-secondary);
}

/* General Source Items */
.general-source-item {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    line-height: 1.6;
    word-break: break-word;
}

.general-source-item:last-child {
    border-bottom: none;
}

.general-source-item a {
    color: var(--usask-green);
    text-decoration: none;
}

.general-source-item a:hover {
    text-decoration: underline;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 var(--spacing-xs);
    background: var(--usask-green);
    color: var(--background);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 14px;
}

.badge-small {
    min-width: 22px;
    height: 22px;
    font-size: 0.75rem;
    border-radius: 11px;
}

.badge-gold {
    background: var(--usask-gold);
    color: var(--text-primary);
}

/* Sources List */
.sources-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.source-item {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.source-item:last-child {
    border-bottom: none;
}

/* Source Icons */
.source-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
}

.book-icon::before {
    content: "📖";
    font-size: 1rem;
}

.url-icon::before {
    content: "🔗";
    font-size: 1rem;
}

/* Source Content */
.source-content {
    flex: 1;
    min-width: 0;
}

/* Book Citation */
.book-citation {
    margin: 0 0 var(--spacing-xs);
    line-height: 1.5;
    word-break: break-word;
}

.book-link {
    display: inline-block;
    color: var(--usask-green);
    font-size: 0.875rem;
    text-decoration: none;
}

.book-link:hover {
    text-decoration: underline;
}

/* URL Link */
.url-link {
    color: var(--usask-green);
    text-decoration: none;
    word-break: break-all;
}

.url-link:hover {
    text-decoration: underline;
}

/* URL Groups */
.url-group {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.url-group:last-child {
    border-bottom: none;
}

.url-group-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.url-domain {
    font-weight: 600;
    color: var(--text-primary);
}

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

.url-group-list {
    list-style: none;
    margin: 0;
    padding-left: calc(20px + var(--spacing-sm));
}

.url-item-simple {
    padding: 2px 0;
}

.url-item-simple .url-link {
    font-size: 0.9rem;
}

/* Communities Section */
.communities-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    margin: 0 0 var(--spacing-md);
    font-size: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--usask-green);
    padding-bottom: var(--spacing-xs);
}

.communities-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Community Card */
.community-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.community-card:hover {
    box-shadow: var(--shadow-md);
}

.community-header {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--background);
    border: none;
    cursor: pointer;
    text-align: left;
    gap: var(--spacing-sm);
    transition: background-color 0.2s;
}

.community-header:hover {
    background: var(--background-alt);
}

.community-header:focus {
    outline: 2px solid var(--usask-green);
    outline-offset: -2px;
}

.community-name {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    flex-grow: 1;
}

.digital-history-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: var(--usask-gold-light);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.digital-history-badge:hover {
    background: var(--usask-gold);
}

.community-content {
    padding: var(--spacing-md);
    background: var(--background-alt);
    border-top: 1px solid var(--border-color);
}

.community-content.collapsed {
    display: none;
}

.digital-history-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    background: var(--usask-green);
    color: var(--background);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: background-color 0.2s;
}

.digital-history-link:hover {
    background: var(--usask-green-dark);
}

.digital-history-link::before {
    content: "Book";
    font-size: 0.875rem;
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

/* Footer */
.site-footer {
    background: var(--text-primary);
    color: var(--background);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.site-footer p {
    margin: 0 0 var(--spacing-xs);
}

.footer-note {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .site-header h1 {
        font-size: 1.75rem;
    }

    .site-header .subtitle {
        font-size: 1rem;
    }

    .stats-section {
        gap: var(--spacing-sm);
    }

    .stat-card {
        min-width: calc(50% - var(--spacing-sm));
        padding: var(--spacing-sm);
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .community-header {
        flex-wrap: wrap;
    }

    .source-item {
        padding: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .site-header {
        padding: var(--spacing-lg) 0;
    }

    .stat-card {
        min-width: 100%;
    }
}

/* Print Styles */
@media print {
    .search-section,
    .toggle-icon {
        display: none;
    }

    .section-content.collapsed,
    .community-content.collapsed {
        display: block;
    }

    .community-card {
        break-inside: avoid;
    }
}