* {
    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, #1a1a2e 0%, #16213e 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: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: rgba(30, 30, 46, 0.95);
    padding: 10px;
    border-radius: 15px;
    border: 1px solid rgba(138, 100, 255, 0.1);
}

.tab {
    flex: 1;
    padding: 12px;
    background: rgba(20, 20, 30, 0.5);
    border: 2px solid rgba(138, 100, 255, 0.3);
    border-radius: 10px;
    color: #e0e0e0;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s;
}

.tab:hover {
    border-color: #8a64ff;
    background: rgba(138, 100, 255, 0.1);
}

.tab.active {
    background: rgba(138, 100, 255, 0.2);
    border-color: #8a64ff;
    font-weight: 600;
    box-shadow: 0 0 15px rgba(138, 100, 255, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Layout */
.main-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.panel {
    background: rgba(30, 30, 46, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    border: 1px solid rgba(138, 100, 255, 0.1);
}

/* Upload Zone */
.upload-zone {
    border: 3px dashed #8a64ff;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: rgba(138, 100, 255, 0.05);
    margin-bottom: 20px;
}

.upload-zone:hover {
    border-color: #b794ff;
    background: rgba(138, 100, 255, 0.1);
    transform: translateY(-2px);
}

.upload-zone.dragover {
    border-color: #b794ff;
    background: rgba(138, 100, 255, 0.15);
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 15px;
    stroke: #8a64ff;
}

.upload-zone h3 {
    color: #e0e0e0;
    margin-bottom: 10px;
}

.upload-zone p {
    color: #b0b0b0;
}

/* Control Groups */
.control-group {
    margin-bottom: 20px;
}

.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #e0e0e0;
    font-size: 0.95em;
}

.control-group select,
.control-group input[type="range"],
.control-group input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 2px solid rgba(138, 100, 255, 0.3);
    border-radius: 8px;
    font-size: 0.95em;
    transition: border-color 0.3s;
    background: rgba(20, 20, 30, 0.5);
    color: #e0e0e0;
}

.control-group select:focus,
.control-group input:focus {
    outline: none;
    border-color: #8a64ff;
}

.control-group input[type="range"] {
    padding: 0;
    height: 8px;
    -webkit-appearance: none;
    background: rgba(138, 100, 255, 0.2);
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: #8a64ff;
    cursor: pointer;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(138, 100, 255, 0.5);
}

.range-value {
    display: inline-block;
    float: right;
    color: #8a64ff;
    font-weight: 600;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Buttons */
.button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #8a64ff 0%, #b794ff 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(138, 100, 255, 0.5);
}

.button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.button.secondary {
    background: rgba(138, 100, 255, 0.2);
    border: 2px solid rgba(138, 100, 255, 0.3);
}

/* Canvas Container */
.canvas-container {
    position: relative;
    background: rgba(20, 20, 30, 0.8);
    border-radius: 15px;
    overflow: hidden;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(138, 100, 255, 0.2);
}

.canvas-container canvas {
    max-width: 100%;
    max-height: 700px;
    display: block;
}

/* Comparison View */
.comparison-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.comparison-panel {
    background: rgba(20, 20, 30, 0.8);
    border-radius: 15px;
    padding: 15px;
    border: 1px solid rgba(138, 100, 255, 0.2);
}

.comparison-panel h3 {
    color: #e0e0e0;
    margin-bottom: 10px;
    text-align: center;
}

.comparison-panel canvas {
    width: 100%;
    border-radius: 10px;
}

/* Placeholder */
.placeholder {
    text-align: center;
    color: #888;
    padding: 40px;
}

.placeholder svg {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    stroke: #555;
}

.placeholder h3 {
    color: #b0b0b0;
    margin-bottom: 10px;
}

.placeholder p {
    color: #888;
}

.formats {
    font-size: 0.85em;
    color: #999;
    margin-top: 10px;
}

/* Pattern Grid */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.pattern-option {
    padding: 12px;
    border: 2px solid rgba(138, 100, 255, 0.3);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9em;
    background: rgba(20, 20, 30, 0.5);
    color: #e0e0e0;
}

.pattern-option:hover {
    border-color: #8a64ff;
    background: rgba(138, 100, 255, 0.1);
    transform: translateY(-2px);
}

.pattern-option.active {
    border-color: #8a64ff;
    background: rgba(138, 100, 255, 0.2);
    font-weight: 600;
    box-shadow: 0 0 15px rgba(138, 100, 255, 0.3);
}

/* Preset Grid */
.preset-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 10px;
}

.preset-option {
    padding: 15px;
    border: 2px solid rgba(138, 100, 255, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    background: rgba(20, 20, 30, 0.5);
    color: #e0e0e0;
}

.preset-option:hover {
    border-color: #8a64ff;
    background: rgba(138, 100, 255, 0.1);
}

.preset-option h4 {
    margin-bottom: 5px;
    color: #8a64ff;
}

.preset-option p {
    font-size: 0.85em;
    opacity: 0.8;
}

/* Dimensions Info */
.dimensions-info {
    background: rgba(138, 100, 255, 0.1);
    padding: 10px;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 0.9em;
    color: #b0b0b0;
}

.dimensions-info strong {
    color: #8a64ff;
}

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

.input-group input {
    flex: 1;
}

/* Batch Processing */
.file-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 15px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    background: rgba(20, 20, 30, 0.5);
    border: 1px solid rgba(138, 100, 255, 0.3);
    border-radius: 8px;
    margin-bottom: 8px;
    color: #e0e0e0;
}

.file-item .file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item .remove-btn {
    padding: 5px 10px;
    background: rgba(255, 100, 100, 0.3);
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 0.9em;
}

.file-item .remove-btn:hover {
    background: rgba(255, 100, 100, 0.5);
}

.batch-progress {
    margin-top: 15px;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: rgba(20, 20, 30, 0.5);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #8a64ff 0%, #b794ff 100%);
    transition: width 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
    }
}