/* =====================================================
   AI Image Processor - Styles
   Dark theme with coral/orange accents
   ===================================================== */

:root {
    /* Colors */
    --bg-primary: #0D0D0D;
    --bg-secondary: #1A1A1A;
    --bg-tertiary: #242424;
    --bg-card: #1E1E1E;
    --bg-hover: #2A2A2A;
    
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --text-muted: #666666;
    
    --accent-coral: #FF6B6B;
    --accent-orange: #FFB347;
    --accent-gradient: linear-gradient(135deg, #FF6B6B 0%, #FFB347 100%);
    --accent-gradient-hover: linear-gradient(135deg, #FF5252 0%, #FFA726 100%);
    
    --success: #4CAF50;
    --error: #F44336;
    --warning: #FFC107;
    
    --border-color: #333333;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-sm: 8px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(255, 107, 107, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-tabs {
    display: flex;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 6px;
    border-radius: var(--border-radius);
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-tab:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-tab.active {
    background: var(--accent-gradient);
    color: white;
}

.nav-tab svg {
    flex-shrink: 0;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Upload Section */
.upload-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.upload-area {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 48px 32px;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent-coral);
    background: rgba(255, 107, 107, 0.05);
}

.upload-area.drag-over {
    transform: scale(1.01);
    box-shadow: var(--shadow-glow);
}

.upload-icon {
    margin-bottom: 24px;
    color: var(--text-muted);
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.upload-btn:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.upload-hint {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.url-input-wrapper {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.url-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.url-toggle {
    padding: 4px 12px;
    background: transparent;
    border: 1px solid var(--text-secondary);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: underline;
    transition: all var(--transition-fast);
}

.url-toggle:hover {
    border-color: var(--accent-coral);
    color: var(--accent-coral);
}

.url-input-section {
    margin-top: 16px;
    animation: slideDown 0.3s ease;
}

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

.url-input-container {
    display: flex;
    gap: 8px;
    max-width: 500px;
    margin: 0 auto;
}

.url-input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.url-input:focus {
    outline: none;
    border-color: var(--accent-coral);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.url-input::placeholder {
    color: var(--text-muted);
}

.url-add-btn {
    padding: 12px 16px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--border-radius-sm);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.url-add-btn:hover {
    transform: scale(1.05);
}

.supported-formats {
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Preview Queue */
.preview-queue {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 24px;
}

.queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.queue-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.image-count {
    color: var(--text-secondary);
    font-weight: 400;
}

.clear-all-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--error);
    border-radius: var(--border-radius-sm);
    color: var(--error);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.clear-all-btn:hover {
    background: var(--error);
    color: white;
}

.queue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

.queue-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background: var(--bg-tertiary);
}

.queue-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.queue-item-remove {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
}

.queue-item:hover .queue-item-remove {
    opacity: 1;
}

.queue-item-remove:hover {
    background: var(--error);
}

.queue-item-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Options Section */
.options-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
}

.option-group h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.option-toggles {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toggle-item span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Custom Toggle */
.toggle {
    position: relative;
    width: 52px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border-radius: 14px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.toggle input:checked + .toggle-slider {
    background: var(--accent-gradient);
}

.toggle input:checked + .toggle-slider::before {
    background: white;
    transform: translateX(24px);
}

/* Scale Selector */
.scale-selector {
    margin-bottom: 20px;
}

.scale-selector label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.scale-buttons {
    display: flex;
    gap: 8px;
}

.scale-btn {
    padding: 12px 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.scale-btn:hover {
    border-color: var(--accent-coral);
    color: var(--text-primary);
}

.scale-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

/* Process Button */
.process-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 18px 32px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.process-btn:hover:not(:disabled) {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.process-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loader {
    display: flex;
    align-items: center;
    gap: 8px;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Results Section */
.results-section {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.results-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.results-actions {
    display: flex;
    gap: 12px;
}

.download-all-btn,
.new-batch-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.download-all-btn {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

.download-all-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-batch-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.new-batch-btn:hover {
    border-color: var(--text-secondary);
    background: var(--bg-tertiary);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.result-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.result-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    background: var(--bg-tertiary);
}

.result-side {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.result-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.result-side img:hover {
    transform: scale(1.05);
}

.result-label {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: white;
}

.result-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
}

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

.result-buttons {
    display: flex;
    gap: 8px;
}

.result-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.result-btn:hover {
    border-color: var(--accent-coral);
    color: var(--accent-coral);
}

.result-btn.download {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

.result-btn.download:hover {
    transform: scale(1.1);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    max-width: 1200px;
    max-height: 90vh;
    overflow: auto;
}

.modal-close {
    position: absolute;
    top: -48px;
    right: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--error);
    border-color: var(--error);
}

.comparison-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.comparison-side h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    text-align: center;
}

.comparison-side img {
    width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    background: var(--bg-tertiary);
}

.modal-actions {
    display: flex;
    justify-content: center;
    margin-top: 24px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1100;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast-message {
    font-size: 0.9rem;
}

/* Footer */
.footer {
    margin-top: 48px;
    padding: 24px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

/* Loading State */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 13, 13, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-coral);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: 20px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.loading-progress {
    margin-top: 16px;
    width: 200px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: 16px;
    }
    
    .header {
        flex-direction: column;
        gap: 16px;
    }
    
    .nav-tabs {
        width: 100%;
    }
    
    .nav-tab {
        flex: 1;
        justify-content: center;
        padding: 10px 12px;
        font-size: 0.8rem;
    }
    
    .upload-area {
        padding: 32px 20px;
    }
    
    .upload-btn {
        padding: 14px 24px;
        font-size: 0.9rem;
    }
    
    .queue-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 12px;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .results-actions {
        width: 100%;
    }
    
    .download-all-btn,
    .new-batch-btn {
        flex: 1;
        justify-content: center;
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .result-comparison {
        grid-template-columns: 1fr;
    }
    
    .option-toggles {
        flex-direction: column;
        gap: 16px;
    }
    
    .scale-buttons {
        flex-wrap: wrap;
    }
    
    .scale-btn {
        flex: 1;
        min-width: 80px;
    }
}