/* OpenBackground - Modern Dark Theme */

:root {
    /* Colors - Deep violet/indigo theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-elevated: #222230;
    
    --text-primary: #f0f0f5;
    --text-secondary: #9090a0;
    --text-muted: #606070;
    
    --accent-primary: #7c3aed;
    --accent-secondary: #6366f1;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 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(124, 58, 237, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Typography */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Reset */
*, *::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: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Background pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 100%, rgba(99, 102, 241, 0.1), transparent);
    pointer-events: none;
    z-index: -1;
}

/* App Container */
.app {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

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

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.api-key-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs) var(--spacing-sm);
}

.api-key-input label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-left: var(--spacing-xs);
}

.api-key-input input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    width: 200px;
    outline: none;
}

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

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm), 0 0 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), 0 0 30px rgba(124, 58, 237, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--border-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

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

.btn.loading .btn-text {
    opacity: 0;
}

.btn.loading .btn-spinner {
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Sections */
.main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

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

.section-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

/* Model Selector */
.model-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.model-selector label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.model-selector select {
    appearance: none;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239090a0' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.model-selector select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.device-badge {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.device-badge.gpu {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: var(--success);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-normal);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-primary);
}

.upload-area:hover::before,
.upload-area.dragover::before {
    opacity: 0.05;
}

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    transition: var(--transition-normal);
}

.upload-area:hover .upload-icon,
.upload-area.dragover .upload-icon {
    color: var(--accent-primary);
    transform: translateY(-4px);
}

.upload-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.upload-subtext {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Options Row */
.options-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input {
    display: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.checkbox-label input:checked + .checkbox-custom {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '';
    width: 5px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-1px, -1px);
}

/* Preview Section */
.preview-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.processing-time {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.preview-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.preview-panel h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.image-wrapper {
    aspect-ratio: 4/3;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.image-wrapper.checkered {
    background-image: 
        linear-gradient(45deg, var(--bg-elevated) 25%, transparent 25%),
        linear-gradient(-45deg, var(--bg-elevated) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--bg-elevated) 75%),
        linear-gradient(-45deg, transparent 75%, var(--bg-elevated) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: var(--bg-tertiary);
}

.image-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: none;
}

.image-wrapper img.visible {
    display: block;
}

.placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.image-wrapper img.visible + .placeholder,
.image-wrapper.has-image .placeholder {
    display: none;
}

.preview-divider {
    color: var(--text-muted);
    padding: var(--spacing-md);
}

/* Statistics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}

.stat-icon.success { color: var(--success); }
.stat-icon.time { color: var(--warning); }
.stat-icon.uptime { color: var(--accent-secondary); }

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Model Stats */
.model-stats h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.model-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.model-bar-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    width: 150px;
    flex-shrink: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.model-bar-track {
    flex: 1;
    height: 8px;
    background: var(--bg-elevated);
    border-radius: 4px;
    overflow: hidden;
}

.model-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width var(--transition-slow);
}

.model-bar-count {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    width: 50px;
    text-align: right;
}

.no-data {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 1000;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn var(--transition-normal) ease-out;
    max-width: 400px;
}

.toast.error {
    border-color: var(--error);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), var(--bg-elevated));
}

.toast.success {
    border-color: var(--success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), var(--bg-elevated));
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
}

.toast-close:hover {
    color: var(--text-primary);
}

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

/* Responsive */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .preview-container {
        grid-template-columns: 1fr;
    }
    
    .preview-divider {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .api-key-input input {
        width: 120px;
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .options-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}