:root {
    /* Light mode colors */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fafafa;
    --bg-hover: #ecf0f1;

    --text-primary: #333333;
    --text-secondary: #7f8c8d;
    --text-heading: #2c3e50;

    --border-light: #e0e0e0;
    --border-medium: #dddddd;

    --accent-primary: #3498db;
    --accent-primary-hover: #2980b9;
    --accent-disabled: #95a5a6;

    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-strong: rgba(0, 0, 0, 0.3);

    --spinner-bg: #f3f3f3;
    --spinner-color: #3498db;

    --modal-backdrop: rgba(0, 0, 0, 0.5);
}

body[data-theme="dark"],
body.dark-mode {
    /* Dark mode colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #242424;
    --bg-hover: #3a3a3a;

    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-heading: #f0f0f0;

    --border-light: #404040;
    --border-medium: #4a4a4a;

    --accent-primary: #4a9eff;
    --accent-primary-hover: #6bb3ff;
    --accent-disabled: #5a5a5a;

    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-strong: rgba(0, 0, 0, 0.6);

    --spinner-bg: #404040;
    --spinner-color: #4a9eff;

    --modal-backdrop: rgba(0, 0, 0, 0.7);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        /* Auto dark mode colors when system prefers dark */
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --bg-tertiary: #242424;
        --bg-hover: #3a3a3a;

        --text-primary: #e0e0e0;
        --text-secondary: #a0a0a0;
        --text-heading: #f0f0f0;

        --border-light: #404040;
        --border-medium: #4a4a4a;

        --accent-primary: #4a9eff;
        --accent-primary-hover: #6bb3ff;
        --accent-disabled: #5a5a5a;

        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.4);
        --shadow-strong: rgba(0, 0, 0, 0.6);

        --spinner-bg: #404040;
        --spinner-color: #4a9eff;

        --modal-backdrop: rgba(0, 0, 0, 0.7);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.header-social {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    gap: 12px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    border-radius: 50%;
    transition: all 0.2s;
    text-decoration: none;
    box-shadow: 0 2px 4px var(--shadow-light);
}

.social-link:hover {
    color: var(--text-heading);
    background-color: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-medium);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

h1 {
    color: var(--text-heading);
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    max-width: 800px;
    margin: 0 auto;
}

.query-section {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-light);
    margin-bottom: 20px;
}

.query-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.query-section label {
    display: block;
    font-weight: 600;
    color: var(--text-heading);
}

.header-buttons {
    display: flex;
    gap: 4px;
    align-items: center;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-heading);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* Legacy support for old class name */
.settings-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-heading);
}

.settings-btn svg {
    width: 20px;
    height: 20px;
}

#overpass-query {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 13px;
    resize: vertical;
    margin-bottom: 15px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.query-controls {
    display: flex;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.example-queries {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 250px;
}

.example-queries label {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 250px;
}

.sort-controls label {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.groupby-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.groupby-controls .toggle-container {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
    position: relative;
}

.groupby-controls .toggle-container span {
    font-weight: 500;
}

/* Tooltip styles */
.groupby-controls .toggle-container[data-tooltip] {
    cursor: help;
}

.groupby-controls .toggle-container[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-heading);
    color: var(--bg-secondary);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.4;
    white-space: normal;
    width: 280px;
    max-width: 90vw;
    box-shadow: 0 4px 12px var(--shadow-strong);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    z-index: 1000;
    text-align: left;
    font-weight: 400;
}

.groupby-controls .toggle-container[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--text-heading);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    z-index: 1001;
}

.groupby-controls .toggle-container[data-tooltip]:hover::after,
.groupby-controls .toggle-container[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
}

.group-by-tag-input {
    width: 120px;
    padding: 8px 10px;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    font-size: 14px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: 'Courier New', Courier, monospace;
}

.group-by-tag-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--shadow-light);
}

#example-select,
#sort-select {
    flex: 1;
    max-width: 300px;
    padding: 10px;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    font-size: 14px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
}

#example-select:focus,
#sort-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--shadow-light);
}

.controls {
    display: flex;
    gap: 20px;
    align-items: center;
}

#submit-btn {
    background-color: var(--accent-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

#submit-btn:hover:not(:disabled) {
    background-color: var(--accent-primary-hover);
}

#submit-btn:disabled {
    background-color: var(--accent-disabled);
    cursor: not-allowed;
}

/* Import Section */
.import-section {
    margin-top: 12px;
}

.import-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px dashed var(--border-color);
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.import-btn:hover {
    border-color: var(--accent-primary);
    background-color: var(--bg-hover);
    color: var(--accent-primary);
}

.import-btn svg {
    flex-shrink: 0;
}

.toggle-container {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.toggle-container input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.color-picker-container {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.color-picker-container span {
    font-weight: 500;
    font-size: 14px;
}

.color-picker-container input[type="color"] {
    width: 50px;
    height: 32px;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    cursor: pointer;
    background: var(--bg-secondary);
}

.color-picker-container input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-picker-container input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

.loading {
    text-align: center;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-light);
}

.spinner {
    border: 4px solid var(--spinner-bg);
    border-top: 4px solid var(--spinner-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

.error {
    background-color: #e74c3c;
    color: white;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.warnings {
    background-color: #f39c12;
    color: white;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.warnings h3 {
    margin-bottom: 10px;
    font-size: 16px;
}

.warnings ul {
    list-style-position: inside;
    font-size: 14px;
}

.warnings a {
    color: #ffffff;
    text-decoration: underline;
    font-weight: 600;
}

.warnings a:hover {
    color: #ecf0f1;
}

.stats {
    background-color: #2ecc71;
    color: white;
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-weight: 600;
}

.hidden {
    display: none !important;
}

.geometry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 220px));
    gap: 20px;
    margin-top: 20px;
    justify-content: center;
}

.geometry-item {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 2px 4px var(--shadow-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.geometry-item:hover {
    box-shadow: 0 4px 8px var(--shadow-medium);
}

.geometry-item.expanded {
    box-shadow: 0 6px 16px var(--shadow-strong);
    background: var(--bg-hover);
}

.geometry-item canvas {
    display: block;
    width: 200px;
    height: 200px;
    max-width: 100%;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    background-color: var(--bg-tertiary);
}

.geometry-meta {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-secondary);
}

.geometry-meta .osm-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.geometry-meta .osm-id {
    font-weight: 600;
    color: var(--accent-primary);
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}

.geometry-meta .osm-id:hover {
    color: var(--accent-primary-hover);
    text-decoration: underline;
}

.geometry-meta .josm-link {
    display: inline-block;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 2px 6px;
    border: 1px solid var(--border-light);
    border-radius: 3px;
    transition: all 0.2s;
    background-color: var(--bg-tertiary);
}

.geometry-meta .josm-link:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

.geometry-meta .osm-tag {
    font-size: 11px;
    line-height: 1.4;
    color: var(--text-secondary);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.geometry-meta .osm-tag:last-child {
    margin-bottom: 0;
}

/* Expand toggle */
.geometry-meta .expand-toggle {
    font-size: 11px;
    color: var(--accent-primary);
    margin-top: 6px;
    padding: 4px 0;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

.geometry-meta .expand-toggle:hover {
    color: var(--accent-primary-hover);
}

/* Expanded tags section */
.geometry-meta .tags-expanded {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-light);
    max-height: 300px;
    overflow-y: auto;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 300px;
    }
}

.geometry-meta .osm-tag-full {
    font-size: 11px;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 4px;
    padding: 3px 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.geometry-meta .osm-tag-full strong {
    color: var(--text-heading);
    font-weight: 600;
    margin-right: 4px;
}

.geometry-meta .osm-tag-full:last-child {
    margin-bottom: 0;
}

/* Custom scrollbar for expanded tags */
.geometry-meta .tags-expanded::-webkit-scrollbar {
    width: 6px;
}

.geometry-meta .tags-expanded::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.geometry-meta .tags-expanded::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 3px;
}

.geometry-meta .tags-expanded::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Legacy support - keep for backwards compatibility */
.geometry-meta .osm-tags {
    font-style: italic;
}

.lazy-loading {
    text-align: center;
    padding: 30px;
    margin: 20px 0;
}

.spinner-small {
    border: 3px solid var(--spinner-bg);
    border-top: 3px solid var(--spinner-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

.lazy-loading p {
    color: var(--text-secondary);
    font-size: 14px;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 8px var(--shadow-light);
    transition: all 0.3s;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.back-to-top svg {
    display: block;
    transition: transform 0.3s;
}

.back-to-top:hover {
    background-color: var(--accent-primary-hover);
    box-shadow: 0 6px 12px var(--shadow-strong);
    transform: translateY(-2px);
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

.back-to-top:active {
    transform: translateY(0);
}

.back-to-top:active svg {
    transform: translateY(0);
}

/* Settings Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 4px 20px var(--shadow-strong);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-heading);
    font-size: 20px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
    line-height: 1;
}

.close-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-heading);
}

.modal-body {
    padding: 20px;
}

.settings-group {
    margin-bottom: 20px;
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group > label:not(.toggle-container):not(.color-picker-container) {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-heading);
}

.settings-group input[type="text"],
.settings-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    font-size: 14px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.settings-group input[type="text"] {
    font-family: 'Courier New', Courier, monospace;
}

.settings-group select {
    cursor: pointer;
}

.settings-group input[type="text"]:focus,
.settings-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--shadow-light);
}

/* Help text for settings */
.settings-group .help-text {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-style: italic;
}

@media (max-width: 768px) {
    .header-social {
        position: static;
        justify-content: center;
        margin-bottom: 15px;
    }

    .query-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .example-queries {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .example-queries label {
        font-size: 13px;
    }

    #example-select {
        max-width: none;
    }

    .sort-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .sort-controls label {
        font-size: 13px;
    }

    #sort-select {
        max-width: none;
    }

    .groupby-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .groupby-controls .toggle-container {
        justify-content: flex-start;
    }

    .groupby-controls .toggle-container[data-tooltip]::after {
        left: 10px;
        right: 10px;
        width: auto;
        transform: none;
    }

    .groupby-controls .toggle-container[data-tooltip]::before {
        left: 30px;
        transform: none;
    }

    .group-by-tag-input {
        width: 100%;
    }

    #submit-btn {
        width: 100%;
    }

    .geometry-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 180px));
        gap: 15px;
        justify-content: center;
    }

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .back-to-top svg {
        width: 20px;
        height: 20px;
    }

    .modal-content {
        width: 95%;
    }
}

/* Error details and suggestions */
.error details {
    margin-top: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    cursor: pointer;
}

.error summary {
    font-weight: bold;
    user-select: none;
}

.error details ul {
    margin-top: 10px;
    margin-bottom: 0;
    padding-left: 20px;
}

.error details li {
    margin-bottom: 5px;
}

.error .suggestion {
    margin-top: 10px;
    padding: 10px;
    background: rgba(33, 150, 243, 0.1);
    border-left: 3px solid #2196f3;
    border-radius: 3px;
}