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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #475569;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-main) 0%, #1e1b4b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.left-column,
.right-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.upload-section,
.form-section,
.status-section,
.result-section {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-placeholder svg {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-placeholder p {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.upload-placeholder small {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.image-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.image-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 0.5rem;
    overflow: hidden;
    background: var(--bg-input);
}

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

.image-preview-item .remove-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.2s;
}

.image-preview-item .remove-btn:hover {
    background: var(--error);
}

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

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

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

input[type="text"],
textarea,
select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

input[type="text"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

textarea {
    resize: vertical;
    font-family: inherit;
}

.char-counter {
    text-align: right;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
}

.btn-primary {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

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

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

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

.status-content {
    padding: 1rem;
    background: var(--bg-input);
    border-radius: 0.5rem;
    border-left: 4px solid var(--warning);
}

.status-content.success {
    border-left-color: var(--success);
}

.status-content.error {
    border-left-color: var(--error);
}

.result-content {
    display: grid;
    gap: 1rem;
}

.result-image {
    border-radius: 0.5rem;
    overflow: hidden;
    background: var(--bg-input);
}

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

.result-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.result-actions a {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-input);
    color: var(--text-primary);
    text-align: center;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: background 0.2s;
}

.result-actions a:hover {
    background: var(--primary);
}

.refine-section {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-input);
    border-radius: 0.5rem;
    border-top: 2px solid var(--primary);
}

.refine-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.refine-prompt {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 1rem;
}

.refine-prompt:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-refine {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-refine:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

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

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: #fca5a5;
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--primary);
    color: #c7d2fe;
}

.placeholder-section {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 3rem 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.placeholder-content svg {
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.placeholder-content h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.placeholder-content p {
    font-size: 0.95rem;
}

.right-column .status-section,
.right-column .result-section {
    position: sticky;
    top: 2rem;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem 0;
    color: var(--text-secondary);
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

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

@media (max-width: 1200px) {
    main {
        grid-template-columns: 1fr;
    }
    
    .right-column {
        order: 2;
    }
    
    .left-column {
        order: 1;
    }
    
    .right-column .status-section,
    .right-column .result-section {
        position: static;
    }
    
    .placeholder-section {
        display: none;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .upload-area {
        padding: 1.5rem 1rem;
    }
    
    .image-preview {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
}