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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --background: #f5f7fa;
    --surface: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e1e8ed;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    padding: 20px;
}

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

.subtitle {
    font-size: 1.1em;
    opacity: 0.95;
}

.workspace {
    background: var(--surface);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.upload-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--background);
    color: var(--text-secondary);
}

.upload-area:hover {
    border-color: var(--secondary-color);
    background: #e8f4f8;
    transform: translateY(-2px);
}

.upload-area svg {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.upload-area p {
    font-size: 1.1em;
}

.preview-container {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    background: var(--background);
}

#previewCanvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
    margin: 0 auto;
    box-shadow: var(--shadow);
}

.preview-controls {
    margin-top: 15px;
    text-align: center;
}

.settings-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.header-with-preset {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 15px;
}

.settings-section h2 {
    color: var(--primary-color);
    font-size: 1.8em;
    margin: 0;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    flex: 1;
}

.preset-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.preset-selector label {
    font-weight: 600;
    color: var(--text-primary);
}

.preset-selector select {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95em;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.preset-selector select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.btn-preset {
    padding: 8px 16px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.btn-preset:hover {
    background: #2980b9;
    transform: translateY(-1px);
}

.machine-info {
    margin-bottom: 20px;
}

.info-card {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 2px solid var(--secondary-color);
    border-radius: 12px;
    padding: 15px;
    color: var(--primary-color);
}

.info-card strong {
    font-size: 1.1em;
    display: block;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.info-card p {
    margin: 5px 0;
    font-size: 0.95em;
    line-height: 1.5;
}

.info-tip {
    margin-top: 10px !important;
    font-style: italic;
    color: #1976d2;
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 25px;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 10px;
}

.settings-grid::-webkit-scrollbar {
    width: 8px;
}

.settings-grid::-webkit-scrollbar-track {
    background: var(--background);
    border-radius: 4px;
}

.settings-grid::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

.setting-group {
    background: var(--background);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.setting-group h3 {
    color: var(--primary-color);
    font-size: 1.2em;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-group label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.setting-group label span {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95em;
    display: block;
    margin-bottom: 5px;
}

.setting-group label small.hint {
    display: block;
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-top: 4px;
    font-style: italic;
}

.setting-group input[type="number"],
.setting-group input[type="text"] {
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    transition: all 0.3s ease;
}

.setting-group input[type="number"]:focus,
.setting-group input[type="text"]:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.setting-group input[type="range"] {
    width: 100%;
    margin-top: 5px;
}

.setting-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--secondary-color);
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.action-section {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.btn-primary,
.btn-secondary,
.btn-success {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
}

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

.btn-primary:hover:not(:disabled) {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.6;
}

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

.btn-secondary:hover {
    background: #5f6e7a;
    transform: translateY(-2px);
}

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

.btn-success:hover:not(:disabled) {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-success:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.6;
}

.status-message {
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    display: none;
    font-weight: 500;
}

.status-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.status-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.status-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    display: block;
}

.candle-info {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 8px;
    padding: 12px;
    margin-top: 15px;
    font-size: 0.9em;
    color: #856404;
}

.candle-info p {
    margin: 0;
    line-height: 1.5;
}

.candle-info strong {
    color: #856404;
}

footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    padding: 20px;
    opacity: 0.9;
}

@media (max-width: 1024px) {
    .workspace {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .header-with-preset {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .preset-selector {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .workspace {
        padding: 20px;
    }
    
    header h1 {
        font-size: 1.5em;
    }
    
    .action-section {
        flex-direction: column;
    }
}