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

:root {
    --primary-color: #6366f1;
    --primary-hover: #5b5df5;
    --secondary-color: #8b5cf6;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

/* Controls Section */
.controls-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

/* Labels */
.label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* Form Controls */
.select, .textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--surface-color);
    color: var(--text-primary);
}

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

.textarea {
    resize: vertical;
    min-height: 80px;
}

/* Model Selector */
.model-selector {
    margin-bottom: 2rem;
}

.model-note {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Mode Tabs */
.mode-tabs {
    display: flex;
    background: var(--background-color);
    border-radius: var(--border-radius-sm);
    padding: 0.25rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.tab-btn.active {
    background: var(--surface-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
}

/* Mode Panels */
.mode-panel {
    display: none;
}

.mode-panel.active {
    display: block;
}

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

/* File Upload */
.upload-area {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: rgb(99 102 241 / 0.02);
}

.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgb(99 102 241 / 0.05);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin: 0 auto 1rem;
}

.upload-placeholder p {
    color: var(--text-secondary);
    font-weight: 500;
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.image-preview {
    display: none;
    max-width: 100%;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.image-preview.active {
    display: block;
}

.image-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.remove-image {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 2rem;
    height: 2rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remove-image:hover {
    background: rgba(0, 0, 0, 0.9);
}

/* Generation Settings */
.generation-settings {
    margin-bottom: 2rem;
}

.settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.setting-group {
    /* Inherits grid layout */
}

/* Generate Button */
.generate-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

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

.generate-btn.loading .loading-spinner {
    opacity: 1;
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    opacity: 0;
    transition: opacity 0.2s;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Results Section */
.results-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.results-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.results-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--background-color);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    color: var(--text-muted);
}

.empty-state p {
    margin-bottom: 0.5rem;
}

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

/* Generated Image Cards */
.image-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.image-card-info {
    padding: 1rem;
}

.image-card-model {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.image-card-prompt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.image-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.action-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

/* Error Message */
.error-message {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--error-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    z-index: 1000;
}

.error-message.show {
    transform: translateX(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .settings-row {
        grid-template-columns: 1fr;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .mode-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        margin-bottom: 0.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0.5rem;
    }
    
    .controls-section,
    .results-section {
        padding: 1.5rem;
    }
    
    .title {
        font-size: 1.75rem;
    }
    
    .upload-area {
        padding: 1.5rem;
    }
}