:root {
    --primary-color: #4f46e5;
    --text-color: #1f2937;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --hover-bg: #f3f4f6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --card-shadow: 0 2px 4px rgba(0,0,0,0.1);
    --input-bg: white;
    --filter-btn-bg: white;
    --filter-btn-color: #333;
    --filter-btn-hover: #f0f0f0;
    --filter-btn-active-bg: #3498db;
    --filter-btn-active-color: white;
    --no-results-color: #666;
    --error-color: #e74c3c;
    --header-top-bg: transparent;
}

.dark-mode {
    --primary-color: #6366f1;
    --text-color: #f9fafb;
    --bg-color: #111827;
    --card-bg: #1f2937;
    --border-color: #374151;
    --hover-bg: #374151;
    --shadow-color: rgba(0, 0, 0, 0.3);
    background-image: 
        radial-gradient(circle at 100% 100%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
        linear-gradient(45deg, rgba(99, 102, 241, 0.03) 25%, transparent 25%, transparent 75%, rgba(99, 102, 241, 0.03) 75%),
        linear-gradient(45deg, rgba(99, 102, 241, 0.03) 25%, transparent 25%, transparent 75%, rgba(99, 102, 241, 0.03) 75%);
    --input-bg: #16213e;
    --filter-btn-bg: #16213e;
    --filter-btn-color: #e6e6e6;
    --filter-btn-hover: #0f3460;
    --filter-btn-active-bg: #3498db;
    --filter-btn-active-color: white;
    --no-results-color: #aaa;
    --error-color: #e74c3c;
    --header-top-bg: #16213e;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 100% 100%, rgba(79, 70, 229, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 0% 0%, rgba(79, 70, 229, 0.03) 0%, transparent 50%),
        linear-gradient(45deg, rgba(79, 70, 229, 0.02) 25%, transparent 25%, transparent 75%, rgba(79, 70, 229, 0.02) 75%),
        linear-gradient(45deg, rgba(79, 70, 229, 0.02) 25%, transparent 25%, transparent 75%, rgba(79, 70, 229, 0.02) 75%);
    background-size: 100% 100%, 100% 100%, 60px 60px, 60px 60px;
    background-position: 0 0, 0 0, 0 0, 30px 30px;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #7c3aed 100%);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.3);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.header-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.info-button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: white;
    padding: 0.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.info-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(15deg);
}

.info-content {
    margin-top: 1.5rem;
    line-height: 1.6;
}

.info-content p {
    margin-bottom: 1rem;
}

.info-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.info-content a:hover {
    color: #4338ca;
    text-decoration: underline;
}

/* Dark mode adjustments */
.dark-mode .info-button {
    background: rgba(255, 255, 255, 0.1);
}

.dark-mode .info-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
}

.dark-mode-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: white;
    padding: 0.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dark-mode-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(15deg);
}

.dark-mode-toggle .sun-icon {
    display: block;
}

.dark-mode-toggle .moon-icon {
    display: none;
}

.dark-mode .dark-mode-toggle .sun-icon {
    display: none;
}

.dark-mode .dark-mode-toggle .moon-icon {
    display: block;
}

.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    z-index: 2;
    display: flex;
    align-items: center;
}

#searchInput {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--text-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    height: 48px;
}

#searchInput:focus {
    outline: none;
    background-color: white;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
    opacity: 0.8;
    z-index: 3;
    font-size: 1.1rem;
    line-height: 1;
}

.filters {
    margin: 2rem 0;
}

.filter-section {
    margin-bottom: 1.5rem;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.2s ease;
}

.filter-header:hover {
    background-color: var(--hover-bg);
}

.filter-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.filter-icon {
    transition: transform 0.3s ease;
}

.filter-section.collapsed .filter-icon {
    transform: rotate(-90deg);
}

.filter-content {
    padding: 1rem 1.5rem;
    max-height: none;
    overflow: visible;
}

.filter-section.collapsed .filter-content {
    max-height: 0;
    padding: 0 1.5rem;
    overflow: hidden;
}

/* Filter containers */
.color-filters, .continent-filters, .pattern-filters, .symbol-filters, 
.motive-filters, .people-filters, .ideology-filters, .text-filters {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
    width: 100%;
}

/* Nested filter sections */
.filter-section .filter-section {
    margin: 0.5rem 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg);
}

.filter-section .filter-section .filter-header {
    padding: 0.75rem 1rem;
}

.filter-section .filter-section .filter-content {
    padding: 0.75rem 1rem;
}

/* More filters section */
.filter-section .filter-section:first-child {
    margin-top: 0;
}

.filter-section .filter-section:last-child {
    margin-bottom: 0;
}

/* Dark mode adjustments for nested sections */
.dark-mode .filter-section .filter-section {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

/* General filter button styles */
.filter-btn {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 100%;
}

.filter-btn:disabled,
.filter-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.filter-btn:not(:disabled):hover {
    background-color: var(--hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.filter-btn.active i {
    color: white;
}

.filter-btn i {
    font-size: 0.9rem;
    min-width: 1rem;
}

/* Color filter buttons */
.color-filters .filter-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.color-filters .filter-btn::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.color-filters .filter-btn[data-color="red"]::before {
    background-color: #e74c3c;
}

.color-filters .filter-btn[data-color="blue"]::before {
    background-color: #3498db;
}

.color-filters .filter-btn[data-color="green"]::before {
    background-color: #2ecc71;
}

.color-filters .filter-btn[data-color="yellow"]::before {
    background-color: #f1c40f;
}

.color-filters .filter-btn[data-color="white"]::before {
    background-color: #ecf0f1;
    border: 1px solid #ddd;
}

.color-filters .filter-btn[data-color="black"]::before {
    background-color: #2c3e50;
}

/* Media query for mobile devices */
@media (max-width: 768px) {
    header {
        padding: 1.5rem;
        border-radius: 12px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .dark-mode-toggle {
        padding: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.4rem 0.6rem;
    }
    
    .filter-header {
        padding: 1.25rem 1.5rem;
    }
    
    .filter-content {
        padding: 1.25rem 1.5rem;
    }
    
    .filter-section .filter-section {
        margin: 0.75rem 0;
    }
    
    .filter-section .filter-section .filter-header {
        padding: 0.75rem 1rem;
    }
    
    .filter-section .filter-section .filter-content {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .color-filters, .continent-filters, .pattern-filters, .symbol-filters, 
    .motive-filters, .people-filters, .ideology-filters, .text-filters {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.3rem;
    }

    .filter-btn {
        padding: 0.35rem 0.5rem;
    }

    .filter-btn i {
        font-size: 0.8rem;
    }
}

.flag-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.flag-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.flag-card:hover {
    transform: translateY(-5px);
}

.flag-card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    aspect-ratio: 3/2;
    object-fit: cover;
}

.flag-card h3 {
    padding: 0.75rem;
    margin: 0;
    text-align: center;
    font-size: 1rem;
    color: var(--text-color);
}

.flag-info {
    padding: 1rem;
    text-align: center;
}

.flag-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.flag-colors {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.color-indicator {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: inline-block;
}

.color-indicator.red {
    background-color: #e74c3c;
}

.color-indicator.blue {
    background-color: #3498db;
}

.color-indicator.green {
    background-color: #2ecc71;
}

.color-indicator.yellow {
    background-color: #f1c40f;
}

.color-indicator.white {
    background-color: #ecf0f1;
    border: 1px solid #ddd;
}

.color-indicator.black {
    background-color: #2c3e50;
}

.color-indicator.orange {
    background-color: #e67e22;
}

.color-indicator.unknown {
    background-color: #95a5a6;
}

.color-text {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-left: 0.5rem;
}

.no-results {
    text-align: center;
    grid-column: 1 / -1;
    padding: 2rem;
    color: var(--no-results-color);
    font-size: 1.2rem;
}

.error {
    text-align: center;
    color: var(--error-color);
    padding: 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .flag-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
}

/* Continent filter buttons */
.continent-filters .filter-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.continent-filters .filter-btn i {
    font-size: 16px;
    transition: transform 0.2s ease;
}

.continent-filters .filter-btn:hover {
    background-color: var(--hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.continent-filters .filter-btn:hover i {
    transform: scale(1.2);
}

.continent-filters .filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.continent-filters .filter-btn.active i {
    color: white;
}

/* Specific continent button colors */
.continent-filters .filter-btn[data-continent="africa"] i {
    color: #e67e22; /* Orange for Africa (savannah) */
}

.continent-filters .filter-btn[data-continent="asia"] i {
    color: #e74c3c; /* Red for Asia (dragon) */
}

.continent-filters .filter-btn[data-continent="europe"] i {
    color: #3498db; /* Blue for Europe (landmarks) */
}

.continent-filters .filter-btn[data-continent="northAmerica"] i {
    color: #2ecc71; /* Green for North America (eagle) */
}

.continent-filters .filter-btn[data-continent="southAmerica"] i {
    color: #27ae60; /* Dark green for South America (rainforest) */
}

.continent-filters .filter-btn[data-continent="oceania"] i {
    color: #1abc9c; /* Teal for Oceania (ocean) */
}

/* Dark mode adjustments */
.dark-mode .continent-filters .filter-btn {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.dark-mode .continent-filters .filter-btn:hover {
    background-color: var(--hover-bg);
}

.dark-mode .continent-filters .filter-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* Dark mode header adjustments */
.dark-mode header {
    background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
}

.dark-mode #searchInput {
    background-color: rgba(31, 41, 55, 0.9);
    color: white;
}

.dark-mode #searchInput:focus {
    background-color: rgba(31, 41, 55, 1);
}

.dark-mode .search-icon {
    color: #a5b4fc;
}

.learn-more-btn {
    margin: 0.5rem 1rem 1rem;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.learn-more-btn:hover {
    background-color: #4338ca;
}

/* Modal styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    overflow-y: auto;
    padding: 2rem;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.close-btn:hover {
    opacity: 1;
}

.modal-flag-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    margin: 0 auto 1.5rem;
    display: block;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.flag-info-details {
    color: var(--text-color);
}

.flag-info-details h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.flag-info-details p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.flag-info-details strong {
    font-weight: 600;
}

.flag-info-details a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    border-bottom: 1px dashed var(--primary-color);
    padding-bottom: 2px;
}

.flag-info-details a:hover {
    color: #4338ca;
    border-bottom: 1px solid #4338ca;
}

/* Increase specificity for the Wikipedia link */
.flag-info-details .wiki-link,
.wiki-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white !important;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.2s ease;
    border-bottom: none !important;
    padding-bottom: 0.5rem;
}

.flag-info-details .wiki-link:hover,
.wiki-link:hover {
    background-color: #4338ca;
    color: white !important;
}

/* Responsive adjustments for modal */
@media (max-width: 768px) {
    .modal {
        padding: 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
    }
    
    .modal-flag-image {
        max-width: 100%;
    }
}

.compact-filter-group {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.compact-filter-group h4 {
    margin: 0 0 0.75rem 0;
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 600;
}

.compact-filter-group .pattern-filters,
.compact-filter-group .symbol-filters,
.compact-filter-group .motive-filters,
.compact-filter-group .people-filters,
.compact-filter-group .ideology-filters,
.compact-filter-group .text-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    flex: 1;
}

.compact-filter-group .filter-btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
    margin: 0;
    min-width: 80px;
    text-align: center;
}

.compact-filter-group .filter-btn i {
    margin-right: 0.3rem;
    font-size: 0.8rem;
}

/* Adjust the main More filters section */
.filter-section .filter-content {
    padding: 0.75rem;
}

/* Make the filter buttons more compact */
.filter-btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
    margin: 0;
    border-radius: 6px;
    min-width: 80px;
}

.filter-btn i {
    margin-right: 0.3rem;
    font-size: 0.8rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .compact-filter-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .compact-filter-group h4 {
        margin-bottom: 0.25rem;
    }
    
    .compact-filter-group .pattern-filters,
    .compact-filter-group .symbol-filters,
    .compact-filter-group .motive-filters,
    .compact-filter-group .people-filters,
    .compact-filter-group .ideology-filters,
    .compact-filter-group .text-filters {
        width: 100%;
    }
}

.flag-counter {
    font-size: 0.9em;
    color: var(--text-color);
    opacity: 0.7;
    margin-left: 10px;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .flag-counter {
        display: none;
    }
}

.report-issue-btn {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.report-issue-btn:hover {
    background-color: #4338ca;
}

.report-form {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.report-form h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-group select,
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.submit-btn,
.cancel-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
}

.submit-btn:hover {
    background-color: #4338ca;
}

.cancel-btn {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.cancel-btn:hover {
    background-color: var(--border-color);
}

@media (max-width: 768px) {
    .report-form {
        padding: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .submit-btn,
    .cancel-btn {
        width: 100%;
    }
}