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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: #f8f9fa;
    color: #2d3748;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: #718096;
    font-weight: 300;
}

.upload-section {
    margin-bottom: 40px;
}

.upload-area {
    border: 3px dashed #cbd5e0;
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    background: white;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: #48bb78;
    background: #f0fff4;
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #38a169;
    background: #e6fffa;
    transform: scale(1.02);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: #a0aec0;
    transition: color 0.3s ease;
}

.upload-area:hover .upload-icon {
    color: #48bb78;
}

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #2d3748;
}

.upload-content p {
    color: #718096;
    font-size: 0.95rem;
}

#imageInput {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.analysis-section {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.image-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

canvas {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.controls {
    margin-bottom: 30px;
}

.control-group {
    margin-bottom: 25px;
}

.control-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 10px;
    color: #2d3748;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 8px;
}

.range-inputs span {
    color: #718096;
    font-weight: 500;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    background: #e2e8f0;
    border-radius: 10px;
    outline: none;
    appearance: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: #48bb78;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #38a169;
}

.range-values {
    font-size: 0.9rem;
    color: #718096;
    text-align: center;
}

.results {
    margin-bottom: 30px;
}

.result-card {
    text-align: center;
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.result-card:hover {
    transform: translateY(-2px);
}

.result-value {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 5px;
}

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

.result-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.detail-item {
    background: #f7fafc;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.detail-label {
    color: #718096;
    font-size: 0.9rem;
}

.detail-value {
    font-weight: 600;
    color: #2d3748;
}

.actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: #48bb78;
    color: white;
}

.btn-primary:hover {
    background: #38a169;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .image-container {
        grid-template-columns: 1fr;
    }
    
    .result-details {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .upload-area {
        padding: 40px 15px;
    }
}