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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: #f8fafc;
    min-height: 100vh;
    color: #2d3748;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    background: white;
    border-radius: 12px;
    padding: 40px 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

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

.subtitle {
    font-size: 1.2rem;
    color: #4a5568;
    font-weight: 400;
}

.workshop-flow {
    position: relative;
}

.step {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    opacity: 0.5;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: none;
}

.step.active {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.step-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.step-number {
    background: #2b6cb0;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 15px;
}

.step-header h2 {
    font-size: 1.8rem;
    color: #1a202c;
    font-weight: 600;
}

.step-content p {
    margin-bottom: 20px;
    color: #718096;
    font-size: 1.1rem;
}

textarea, input, select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    margin-bottom: 15px;
}

textarea:focus, input:focus, select:focus {
    outline: none;
    border-color: #667eea;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

.btn {
    background: #2b6cb0;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 10px 5px;
}

.btn:hover {
    background: #2c5282;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(43, 108, 176, 0.3);
}

.btn.secondary {
    background: #718096;
}

.btn.secondary:hover {
    background: #4a5568;
    box-shadow: 0 4px 12px rgba(113, 128, 150, 0.3);
}

.complaint-item {
    background: #f7fafc;
    padding: 15px;
    border-radius: 12px;
    margin: 10px 0;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.complaint-item:hover {
    background: #edf2f7;
    transform: translateY(-2px);
}

.complaint-item.selected {
    border-color: #2b6cb0;
    background: #ebf8ff;
}

.business-model, .prototype-tools {
    display: grid;
    gap: 20px;
}

.model-section, .tool-section {
    background: #f7fafc;
    padding: 20px;
    border-radius: 12px;
}

.model-section h4, .tool-section h4 {
    margin-bottom: 10px;
    color: #4a5568;
    font-weight: 600;
}

.tech-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.tech-options label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.tech-options label:hover {
    background: #edf2f7;
}

.tech-options input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    margin-bottom: 0;
}

.progress-bar {
    background: #e2e8f0;
    height: 6px;
    border-radius: 3px;
    margin-top: 30px;
    overflow: hidden;
}

.progress {
    background: #2b6cb0;
    height: 100%;
    width: 20%;
    transition: width 0.5s ease;
    border-radius: 3px;
}

.prototype-card {
    background: white;
    color: #1a202c;
    padding: 30px;
    border-radius: 12px;
    margin: 20px 0;
    border: 2px solid #e2e8f0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.prototype-card h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: #2b6cb0;
    font-weight: 700;
}

.prototype-card p {
    font-size: 1.1rem;
    margin-bottom: 12px;
    line-height: 1.7;
}

.prototype-card strong {
    color: #2d3748;
    font-weight: 600;
}

.feature-list {
    list-style: none;
    margin: 20px 0;
}

.feature-list li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 1rem;
    color: #4a5568;
}

.feature-list li:last-child {
    border-bottom: none;
}

.prototype-card h4 {
    color: #2d3748;
    font-size: 1.3rem;
    margin-top: 25px;
    margin-bottom: 15px;
    font-weight: 600;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.tech-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

.loading {
    text-align: center;
    padding: 40px 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid #2b6cb0;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.idea-card {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 20px;
    margin: 15px 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.idea-card:hover {
    border-color: #2b6cb0;
    transform: translateY(-2px);
}

.idea-card.selected {
    border-color: #2b6cb0;
    background: #ebf8ff;
}

.prototype-demo {
    background: #1a202c;
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    color: #e2e8f0;
    font-family: 'Courier New', monospace;
}

.demo-interface {
    background: #2d3748;
    border-radius: 8px;
    padding: 15px;
    margin: 10px 0;
}

.validation-framework {
    display: grid;
    gap: 25px;
}

.validation-section {
    background: #f7fafc;
    padding: 20px;
    border-radius: 12px;
}

.validation-section h4 {
    margin-bottom: 15px;
    color: #4a5568;
    font-weight: 600;
}

.rating-group {
    display: grid;
    gap: 8px;
}

.rating-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.rating-group label:hover {
    background: #edf2f7;
}

.rating-group input[type="radio"] {
    width: auto;
    margin-right: 10px;
    margin-bottom: 0;
}

.validation-score {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 12px;
    margin: 20px 0;
}

.validation-score h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.button-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    gap: 10px;
}

.button-group .btn {
    margin: 0;
    flex: 1;
    max-width: 200px;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .step {
        padding: 20px;
    }
    
    .step-header h2 {
        font-size: 1.5rem;
    }
    
    .btn {
        width: 100%;
        margin: 5px 0;
    }
    
    .actions .btn {
        width: auto;
        margin: 5px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group .btn {
        width: 100%;
        max-width: none;
        margin: 5px 0;
    }
}