:root {
    --primary-color: #6366f1;
    --primary-hover: #5b5bd6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --success-hover: #059669;
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --secondary-color: #94a3b8;
    --success-color: #34d399;
    --success-hover: #10b981;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --border-hover: #475569;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.logo i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
}

.theme-toggle:hover {
    background: var(--border-hover);
    transform: translateY(-1px);
}

.version {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(400px, 1fr) minmax(400px, 1fr);
    gap: 2rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    min-height: calc(100vh - 80px);
}

/* Left Panel */
.left-panel {
    background: var(--surface);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    height: fit-content;
    min-height: calc(100vh - 120px);
    transition: var(--transition);
    overflow-y: auto;
}

.control-section h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

.control-section h2 i {
    color: var(--primary-color);
}

/* Prompt Input */
.prompt-input-section {
    margin-bottom: 2rem;
}

.prompt-input-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

#prompt-text {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    transition: var(--transition);
    background: var(--surface);
    color: var(--text-primary);
    min-height: 120px;
}

#prompt-text:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Parameters */
.parameters-section {
    margin-bottom: 2rem;
}

.parameters-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
}

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

.parameter-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.parameter-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--surface);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.parameter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.intensity-slider {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.intensity-slider input[type="range"] {
    flex: 1;
    height: 0.25rem;
    background: var(--border);
    border-radius: 0.125rem;
    outline: none;
    -webkit-appearance: none;
}

.intensity-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.intensity-value {
    font-weight: 500;
    color: var(--primary-color);
    font-size: 0.875rem;
    min-width: 2.5rem;
}

/* Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 48px;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: #475569;
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-1px);
}

/* AI Feedback */
.ai-feedback-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.ai-feedback-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.ai-feedback-section h3 i {
    color: #f59e0b;
}

.feedback-content {
    background: var(--surface-hover);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.feedback-content .placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

.quick-tips {
    margin-top: 1rem;
}

.quick-tips h4 {
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tip-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: background 0.2s ease;
}

.tip-tag:hover {
    background: var(--primary-hover);
}

/* Saved Creations */
.saved-creations-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.saved-creations-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.saved-creations-section h3 i {
    color: #06b6d4;
}

.saved-creations-list {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.saved-creation-item {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.saved-creation-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.creation-image {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 0.375rem;
    overflow: hidden;
    background: var(--border);
}

.creation-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.creation-content {
    flex: 1;
    min-width: 0;
}

.creation-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.creation-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.creation-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.creation-prompt {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    max-height: 3em;
    overflow: hidden;
    text-overflow: ellipsis;
}

.creation-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.creation-action-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.creation-action-btn:hover {
    background: var(--surface-hover);
}

.creation-action-btn.delete {
    color: #ef4444;
    border-color: #ef4444;
}

.creation-action-btn.delete:hover {
    background: #fef2f2;
}

/* Right Panel */
.right-panel {
    background: var(--surface);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    height: fit-content;
    min-height: calc(100vh - 120px);
    transition: var(--transition);
    overflow-y: auto;
}

.preview-section h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

.preview-section h2 i {
    color: var(--primary-color);
}

/* Current Prompt */
.current-prompt {
    margin-bottom: 2rem;
}

.current-prompt h3 {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.prompt-display {
    background: var(--surface-hover);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    min-height: 100px;
    transition: var(--transition);
}

/* Refined Prompts */
.refined-prompts h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.prompts-grid {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.prompt-variant {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.prompt-variant:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.prompt-variant.selected {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.variant-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.variant-content {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Generated Image */
.generated-image-section h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.image-container {
    background: var(--surface-hover);
    border: 2px dashed var(--border);
    border-radius: 0.75rem;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition);
}

.image-placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.image-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--border-hover);
}

.generated-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.375rem;
}

.image-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-content {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

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

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1100;
}

.toast {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 300px;
}

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

.toast.error {
    border-left: 4px solid #ef4444;
}

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

/* Responsive */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        max-width: 800px;
    }
    
    .left-panel,
    .right-panel {
        min-height: auto;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
        gap: 1rem;
    }
    
    .left-panel,
    .right-panel {
        padding: 1rem;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .image-actions {
        grid-template-columns: 1fr;
    }
    
    .theme-toggle {
        width: 2rem;
        height: 2rem;
        padding: 0.375rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        grid-template-columns: 1fr;
        padding: 0.5rem;
    }
    
    .header {
        padding: 0.75rem;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .left-panel,
    .right-panel {
        padding: 1rem;
        border-radius: 0.5rem;
    }
}