/* ===== CSS Variables ===== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-accent: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --primary-color: #007bff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-primary: #212529;
    --bg-secondary: #343a40;
    --bg-accent: #495057;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.3;
    transition: all 0.3s ease;
    margin: 0;
    padding: 15px;
}

/* ===== Main Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 15px 0;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--bg-accent);
}

.welcome-section {
    background: var(--bg-accent);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.welcome-section h2 {
    color: var(--primary-color);
    margin: 0 0 12px 0;
    font-size: 1.4em;
    font-weight: 500;
}

.welcome-section p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
    font-size: 0.95em;
}

.content-section {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    border: 1px solid var(--border-color);
}

.content-section h3 {
    color: var(--primary-color);
    margin: 0 0 15px 0;
    font-size: 1.2em;
    font-weight: 500;
}

.content-section p {
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.6;
}

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

.main-navigation {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.main-navigation a {
    color: var(--primary-color);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.main-navigation a:hover {
    background: var(--bg-accent);
    text-decoration: underline;
}

.site-footer {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
    text-align: center;
}

.footer-links a {
    color: var(--primary-color);
    text-decoration: none;
    padding: 0 8px;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* Cookie notice styles now handled by cookie-consent.js */

/* Fix dark mode visibility for strong text elements */
strong,
.help-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Help text boxes with better dark mode contrast */
.help-text {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .help-text {
    background: #2c3e50 !important;
    border: 1px solid #34495e !important;
    color: #ecf0f1 !important;
}

[data-theme="dark"] .help-text strong {
    color: #ecf0f1 !important;
}

.help-text strong {
    color: inherit !important;
}

/* ===== Form Components ===== */
.upload-section {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.upload-section.drag-over {
    border-color: var(--primary-color);
    background: var(--bg-accent);
}

.upload-section input[type="file"] {
    display: none;
}

.upload-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    margin: 10px;
    transition: all 0.3s ease;
}

.upload-btn:hover {
    background: #0056b3;
}

.options-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.option-group {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.option-group h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.2;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
}

.radio-option input[type="radio"] {
    margin: 0;
}

.process-btn {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    width: 100%;
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.process-btn:hover:not(:disabled) {
    background: #218838;
}

.process-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
}

.scaling-mode {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

.scaling-mode .radio-option {
    margin-bottom: 0;
    padding: 5px;
}

.scaling-inputs {
    margin-top: 15px;
}

.scaling-inputs label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.scaling-inputs input[type="number"] {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
    margin-bottom: 5px;
}

.scaling-inputs small {
    color: var(--text-secondary);
    font-size: 12px;
}

.size-inputs {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
}

.size-input-group {
    flex: 1;
}

.size-input-group label {
    font-size: 14px;
    margin-bottom: 3px;
}

.size-info {
    padding: 8px;
    background: var(--hover-bg);
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.size-info small {
    color: var(--text-secondary);
    font-size: 12px;
}

.dimensions-info {
    margin-top: 5px;
}

.dimensions-info small {
    color: var(--text-secondary);
    font-size: 11px;
}

.factor-mode-options {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

.factor-mode-options label {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 0;
    font-weight: normal;
    cursor: pointer;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.preset-option {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-color);
    margin-bottom: 0;
    font-weight: normal;
    text-align: center;
}

.preset-option:hover {
    background: var(--hover-bg);
}

.preset-option input[type="radio"]:checked + span,
.preset-option:has(input[type="radio"]:checked) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.progress-section {
    display: none;
    margin-bottom: 30px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--bg-accent);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--success-color);
    width: 0%;
    transition: width 0.3s ease;
}

.results-section {
    display: none;
}

.result-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.result-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

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

.preview-item img {
    max-width: 100%;
    max-height: 150px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.download-previews {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.download-preview-item {
    text-align: center;
    padding: 10px;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.download-preview-item h5 {
    margin: 0 0 8px 0;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.preview-thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: transform 0.2s ease;
    margin-bottom: 8px;
}

.preview-thumbnail:hover {
    transform: scale(1.05);
}

.download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.download-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #0056b3;
}

.batch-download-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.batch-download-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.batch-download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #f5c6cb;
    margin-bottom: 20px;
    display: none;
}

[data-theme="dark"] .error-message {
    background: #2d1b1f;
    color: #f8d7da;
    border-color: #842029;
}

/* ===== Media Queries ===== */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
    }

    .options-section {
        grid-template-columns: 1fr;
    }

    .upload-section {
        padding: 20px;
    }

    .main-navigation {
        flex-direction: column;
        gap: 10px;
        padding: 15px 10px;
    }

    .main-navigation a {
        text-align: center;
        padding: 12px 16px;
        display: block;
        width: 100%;
        box-sizing: border-box;
    }

    .container {
        padding: 15px;
        margin: 10px auto;
    }
}

.file-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 10px;
}

.uploaded-files {
    margin-top: 15px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: none;
}

.uploaded-files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    cursor: pointer;
    user-select: none;
    padding: 3px 0;
}

.uploaded-files-header:hover {
    color: var(--accent-color);
}

.collapse-toggle {
    font-size: 1.1rem;
    font-weight: bold;
    transition: transform 0.2s ease;
}

.collapse-toggle.collapsed {
    transform: rotate(-90deg);
}

.file-list-container {
    transition:
        max-height 0.3s ease,
        opacity 0.3s ease;
    overflow: hidden;
    max-height: 300px;
    overflow-y: auto;
}

.file-list-container.collapsed {
    max-height: 0;
    opacity: 0;
}

.uploaded-files h4 {
    color: var(--success-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.file-item {
    padding: 6px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 3px;
    line-height: 1.2;
}

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

.file-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.file-thumbnail {
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.file-dimensions {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-top: 1px;
    line-height: 1.1;
}

.scale-previews {
    display: flex;
    gap: 8px;
    margin-top: 4px;
    font-size: 0.65rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.scale-preview-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 60px;
}

.scale-factor-label {
    font-weight: 500;
    margin-bottom: 1px;
    font-size: 0.65rem;
}

.scale-dimensions {
    font-size: 0.6rem;
    line-height: 1.2;
}

.scale-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
    margin-top: 8px;
    padding: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.scale-option {
    text-align: center;
    padding: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.scale-factor {
    font-weight: 500;
    color: var(--text-primary);
}

.success-icon {
    color: var(--success-color);
    font-weight: bold;
}

.delete-btn {
    background-color: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-left: 8px;
}

.delete-btn:hover {
    background-color: #dc2626;
}

.file-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.loading-spinner {
    border: 3px solid var(--bg-accent);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: 10px;
}

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

/* Ad Container Styles */
.ad-container {
    margin: 20px 0;
    text-align: center;
    padding: 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.ad-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ad-location-a {
    max-width: 100%;
    margin: 20px auto;
}

.ad-location-b {
    max-width: 320px;
    margin: 20px auto;
}

.ad-placeholder {
    background: var(--bg-accent);
    border: 2px dashed var(--border-color);
    padding: 40px 20px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-style: italic;
}

@media (max-width: 768px) {
    .ad-container {
        margin: 15px 0;
        padding: 10px;
    }

    .ad-location-a .ad-placeholder {
        padding: 20px 10px;
        font-size: 0.9rem;
    }
}

/* ===== Utility Classes ===== */

/* Spacing */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Text */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

/* Flexbox */
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }

/* Misc */
.w-100 { width: 100%; }
.mx-auto { margin-left: auto; margin-right: auto; }
.rounded { border-radius: 8px; }
.shadow { box-shadow: var(--shadow); }