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

body {
    font-family: 'Noto Sans', sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #1a1a1a;
}

h1 {
    font-size: 2rem;
    margin-bottom: 20px;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 5px;
}

.value {
    font-size: 1.3rem;
    font-weight: bold;
}

.phase {
    margin-bottom: 30px;
}

.hidden {
    display: none;
}

.product-grid,
.test-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    border: 2px solid #1a1a1a;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 4px 4px 0 #1a1a1a;
}

.card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.card p {
    margin-bottom: 10px;
    color: #444;
}

.card .cost {
    font-weight: bold;
    color: #1a1a1a;
}

.btn {
    padding: 12px 30px;
    font-size: 1rem;
    border: 2px solid #1a1a1a;
    background: #ffffff;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: bold;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 3px 3px 0 #1a1a1a;
}

.btn-primary {
    background: #1a1a1a;
    color: #ffffff;
}

.btn-secondary {
    background: #ffffff;
    color: #1a1a1a;
}

.btn-danger {
    background: #ffffff;
    color: #c00;
    border-color: #c00;
}

.btn-danger:hover {
    box-shadow: 3px 3px 0 #c00;
}

.decision-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.selected-product-info {
    background: #f5f5f5;
    padding: 15px;
    margin-bottom: 20px;
    border: 2px solid #1a1a1a;
}

.result-content,
.launch-content {
    background: #f5f5f5;
    padding: 30px;
    border: 2px solid #1a1a1a;
    margin-bottom: 20px;
}

.feedback-item {
    margin: 15px 0;
    padding: 15px;
    background: #ffffff;
    border-left: 4px solid #1a1a1a;
}

.score {
    font-size: 2rem;
    font-weight: bold;
    margin: 20px 0;
}

.positive {
    color: #2a7221;
}

.negative {
    color: #c00;
}

.game-over {
    text-align: center;
    padding: 60px 20px;
}

.game-over h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.game-over p {
    font-size: 1.2rem;
    margin: 10px 0;
}

@media (max-width: 600px) {
    .stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .product-grid,
    .test-grid {
        grid-template-columns: 1fr;
    }
    
    .decision-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}