/**
 * Minutes Search Application - Main Stylesheet
 * Version: 1.0.0
 * Author: Council Minutes Search Team
 * Description: Production-ready CSS for council meeting minutes search application
 */

/* ============================================
   CSS Custom Properties (CSS Variables)
   ============================================ */
:root {
    /* Primary Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;

    /* Semantic Colors */
    --success-color: #10b981;
    --success-light: #34d399;
    --warning-color: #f59e0b;
    --warning-light: #fbbf24;
    --danger-color: #ef4444;
    --danger-light: #f87171;
    --info-color: #06b6d4;

    /* Background Colors */
    --bg-color: #f8fafc;
    --bg-secondary: #f1f5f9;
    --card-bg: #ffffff;
    --overlay-bg: rgba(0, 0, 0, 0.5);

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;

    /* Border Colors */
    --border-color: #e2e8f0;
    --border-color-hover: #cbd5e1;
    --border-color-focus: var(--primary-color);

    /* 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 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.1);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 30px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 10px;
    --radius-2xl: 12px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;

    /* Z-index layers */
    --z-dropdown: 50;
    --z-sticky: 100;
    --z-modal: 1000;
    --z-tooltip: 1100;
}

/* ============================================
   Base Styles & Reset
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: inherit;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   Layout Components
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ============================================
   Header Component
   ============================================ */
header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-base);
}

header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.header-title-group {
    flex: 1 1 auto;
    min-width: 0;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.025em;
}

.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

.stats {
    display: flex;
    gap: var(--spacing-xl);
    font-size: 14px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    white-space: nowrap;
}

.stat-value {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 16px;
}

/* ============================================
   Search Section
   ============================================ */
.search-section {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    margin: var(--spacing-3xl) 0;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition-base);
}

.search-section:hover {
    box-shadow: var(--shadow-md);
}

.search-box {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.search-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all var(--transition-base);
    font-family: inherit;
}

.search-input:hover {
    border-color: var(--border-color-hover);
}

.search-input:focus {
    border-color: var(--border-color-focus);
    box-shadow: var(--shadow-focus);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

/* ============================================
   Button Components
   ============================================ */
.btn {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-family: inherit;
    white-space: nowrap;
    user-select: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-color);
    border-color: var(--border-color-hover);
}

.btn-small {
    padding: 6px var(--spacing-md);
    font-size: 14px;
}

.btn-success {
    background: var(--success-color);
    color: var(--text-inverse);
}

.btn-success:hover:not(:disabled) {
    background: var(--success-light);
}

.btn-danger {
    background: var(--danger-color);
    color: var(--text-inverse);
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger-light);
}

/* ============================================
   Filters Component
   ============================================ */
.filters-toggle {
    margin-bottom: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.filters-panel {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    animation: slideDown var(--transition-base);
}

.filters-panel.active {
    display: grid;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.filter-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.filter-group input,
.filter-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-base);
    font-family: inherit;
}

.filter-group input:hover,
.filter-group select:hover {
    border-color: var(--border-color-hover);
}

.filter-group input:focus,
.filter-group select:focus {
    border-color: var(--border-color-focus);
    box-shadow: var(--shadow-focus);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
}

/* ============================================
   Results Section
   ============================================ */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.results-info {
    font-size: 14px;
    color: var(--text-secondary);
}

.results-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

.export-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   Result Cards
   ============================================ */
.results-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.result-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.result-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.result-card:hover::before {
    transform: scaleY(1);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.result-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.meta-label {
    font-weight: 600;
}

.score-badge {
    background: var(--success-color);
    color: var(--text-inverse);
    padding: 4px var(--spacing-md);
    border-radius: var(--radius-2xl);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.result-snippet {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* Highlight styles for search matches */
.result-snippet mark,
.result-snippet mark.exact-word {
    background: #ffeb3b;
    color: #000000;
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Exact phrase match - brighter yellow with border */
.result-snippet mark.exact-phrase {
    background: #ffd600;
    color: #000000;
    padding: 3px 6px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    border: 2px solid #ff9800;
    box-shadow: 0 2px 4px rgba(255, 152, 0, 0.3);
}

/* Modal content highlighting */
.modal-body mark,
.document-content mark {
    background: #ffeb3b;
    color: #000000;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.modal-body mark.exact-phrase,
.document-content mark.exact-phrase {
    background: #ffd600;
    border: 2px solid #ff9800;
    padding: 3px 6px;
    font-weight: 700;
}

.result-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.tag {
    background: var(--bg-color);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.tag:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.tag.resolution {
    background: #dbeafe;
    color: #1e40af;
    border-color: #93c5fd;
}

.tag.ordinance {
    background: #dcfce7;
    color: #166534;
    border-color: #86efac;
}

.tag.committee {
    background: #fef3c7;
    color: #92400e;
    border-color: #fcd34d;
}

/* ============================================
   Pagination Component
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-3xl) 0;
    flex-wrap: wrap;
}

.pagination button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-base);
    font-family: inherit;
}

.pagination button:hover:not(:disabled) {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination .page-info {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 0 var(--spacing-sm);
}

/* ============================================
   Loading State
   ============================================ */
.loading {
    text-align: center;
    padding: 40px var(--spacing-xl);
    color: var(--text-secondary);
}

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-xl);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading p {
    font-size: 16px;
    font-weight: 500;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: 60px var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-xl);
    opacity: 0.5;
}

.empty-state h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    font-size: 16px;
    margin-bottom: var(--spacing-lg);
}

.empty-state strong {
    display: block;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

/* ============================================
   Modal Component
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-bg);
    z-index: var(--z-modal);
    overflow-y: auto;
    backdrop-filter: blur(2px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-slow);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.4;
}

.close-modal {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

.modal-body {
    font-size: 15px;
    line-height: 1.8;
    white-space: pre-wrap;
    color: var(--text-primary);
}

/* ============================================
   Error/Alert Component
   ============================================ */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid;
    animation: slideDown var(--transition-base);
}

.alert-error {
    background: #fee2e2;
    border-color: #fca5a5;
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    border-color: #fcd34d;
    color: #92400e;
}

.alert-success {
    background: #d1fae5;
    border-color: #86efac;
    color: #065f46;
}

.alert-info {
    background: #dbeafe;
    border-color: #93c5fd;
    color: #1e40af;
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
    display: none !important;
}

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

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: var(--spacing-xl);
}

.mb-20 {
    margin-bottom: var(--spacing-xl);
}

.fade-in {
    animation: fadeIn var(--transition-base);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 20px;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats {
        width: 100%;
        justify-content: space-between;
    }

    .search-box {
        flex-direction: column;
    }

    .search-section {
        padding: var(--spacing-xl);
    }

    .filters-panel {
        grid-template-columns: 1fr;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .export-buttons {
        width: 100%;
        flex-direction: column;
    }

    .export-buttons button {
        width: 100%;
    }

    .result-header {
        flex-direction: column;
    }

    .score-badge {
        align-self: flex-start;
    }

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

    .modal-content {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .search-section {
        padding: var(--spacing-lg);
    }

    .result-card {
        padding: var(--spacing-lg);
    }

    .filters-toggle {
        flex-direction: column;
    }

    .filters-toggle button {
        width: 100%;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    header {
        position: static;
        box-shadow: none;
    }

    .search-section,
    .filters-panel,
    .pagination,
    .export-buttons,
    .btn {
        display: none !important;
    }

    .result-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }

    .modal {
        display: none !important;
    }
}

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

/* Focus visible for keyboard navigation */
.btn:focus-visible,
.search-input:focus-visible,
.filter-group input:focus-visible,
.filter-group select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-secondary: #000;
    }

    .result-card {
        border-width: 2px;
    }
}