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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.main-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 20px;
    align-items: start;
}

.left-panel, .right-panel {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.left-panel {
    max-height: 90vh;
    overflow-y: auto;
}

.panel-section {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid #e0e0e0;
}

.panel-section:last-child {
    border-bottom: none;
}

.panel-section h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

label {
    display: block;
    margin-top: 12px;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
    font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 2px dashed #667eea;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

input[type="color"] {
    width: 100%;
    height: 40px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    cursor: pointer;
}

input[type="range"] {
    width: calc(100% - 60px);
    margin-right: 10px;
}

.slider-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
}

.slider-control input[type="range"] {
    flex: 1;
    margin: 0;
    width: auto;
}

.slider-control input[type="number"] {
    width: 70px;
    padding: 5px 8px;
    text-align: center;
    margin: 0;
}

.slider-control .unit {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
    min-width: 20px;
}

input[type="checkbox"] {
    margin-right: 8px;
}

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

.input-group {
    display: flex;
    gap: 10px;
}

.input-group input {
    flex: 1;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

button:disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    margin-bottom: 10px;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    width: 100%;
    padding: 15px;
    background: #10b981;
    color: white;
    font-size: 16px;
    margin-bottom: 10px;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
    width: 100%;
    padding: 12px;
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-small {
    padding: 8px 15px;
    background: #667eea;
    color: white;
}

.btn-small:hover {
    background: #5568d3;
}

.file-input-label {
    display: block;
    width: 100%;
    padding: 12px;
    background: #764ba2;
    color: white;
    text-align: center;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.file-input-label:hover {
    background: #653a8a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.4);
}

.upload-preview {
    margin-top: 10px;
    min-height: 80px;
    border: 2px dashed #e0e0e0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
}

.upload-preview img {
    max-width: 100%;
    max-height: 150px;
    border-radius: 6px;
}

.preview-section {
    text-align: center;
}

.preview-section h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.canvas-container {
    background: #f9fafb;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#previewCanvas {
    max-width: 100%;
    max-height: 600px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    cursor: move;
}

.preview-controls {
    margin-top: 20px;
}

.status-message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 6px;
    font-size: 14px;
    display: none;
}

.status-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
    display: block;
}

.status-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
    display: block;
}

.status-message.info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #3b82f6;
    display: block;
}

.drag-hint {
    margin-top: 10px;
    padding: 8px;
    background: #fef3c7;
    color: #92400e;
    border-radius: 6px;
    font-size: 13px;
    text-align: center;
    border: 1px solid #fbbf24;
}

/* Batch Mode Styles */
.batch-queue {
    margin-top: 15px;
    padding: 15px;
    background: #f3f4f6;
    border-radius: 8px;
    border: 2px solid #e5e7eb;
}

.batch-queue h4 {
    font-size: 0.95rem;
    color: #374151;
    margin-bottom: 10px;
}

.batch-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 10px;
}

.batch-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px;
    background: white;
    border-radius: 6px;
    margin-bottom: 5px;
    font-size: 0.85rem;
}

.batch-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #374151;
}

.batch-item-remove {
    background: #ef4444;
    color: white;
    border: none;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    margin-left: 10px;
}

.batch-item-remove:hover {
    background: #dc2626;
}

.batch-progress {
    margin-top: 15px;
    padding: 15px;
    background: #f3f4f6;
    border-radius: 8px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #e5e7eb;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
    width: 0%;
}

#progressText {
    text-align: center;
    font-size: 0.9rem;
    color: #374151;
    font-weight: 500;
}

/* Scrollbar styling */
.left-panel::-webkit-scrollbar {
    width: 8px;
}

.left-panel::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.left-panel::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

.left-panel::-webkit-scrollbar-thumb:hover {
    background: #5568d3;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .left-panel {
        max-height: none;
    }
}