.score-distribution-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 15px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.score-distribution-container h1 {
    text-align: center;
    color: #A52A2A;
    margin-bottom: 8px;
    font-size: 1.4em;
    font-weight: 600;
}

.score-distribution-container .subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9em;
}

.score-distribution-container .input-section {
    background: linear-gradient(135deg, #A52A2A, #8B1A1A);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: center;
    color: white;
}

.score-distribution-container .input-section h3 {
    font-size: 1em;
    margin-bottom: 10px;
}

.score-distribution-container .input-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.score-distribution-container label {
    font-size: 0.9em;
    font-weight: 500;
}

.score-distribution-container input[type="number"] {
    padding: 8px 10px;
    border: none;
    border-radius: 6px;
    font-size: 0.9em;
    width: 80px;
    text-align: center;
    background: rgba(255,255,255,0.95);
    color: #333;
}

.score-distribution-container input[type="number"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(208,173,112,0.5);
}

.score-distribution-container button {
    background: linear-gradient(135deg, #D0AD70, #B8965A);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.score-distribution-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(208,173,112,0.4);
}

.score-distribution-container button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.score-distribution-container .chart-container {
    position: relative;
    height: 300px;
    margin: 10px 0;
    background: white;
    border-radius: 8px;
    padding: 10px;
    border: 1px solid #eee;
}

.score-distribution-container .stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-top: 15px;
}

.score-distribution-container .stat-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    border-left: 3px solid #A52A2A;
}

.score-distribution-container .stat-value {
    font-size: 1.2em;
    font-weight: bold;
    color: #A52A2A;
    margin-bottom: 2px;
}

.score-distribution-container .stat-label {
    color: #666;
    font-size: 0.7em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.score-distribution-container .message {
    padding: 8px;
    border-radius: 6px;
    margin: 8px 0;
    text-align: center;
    font-weight: 500;
    font-size: 0.8em;
}

.score-distribution-container .success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
    border: 1px solid #c3e6cb;
}

.score-distribution-container .error {
    background: linear-gradient(135deg, #f8d7da, #f1b0b7);
    color: #721c24;
    border: 1px solid #f1b0b7;
}

.score-distribution-container .info {
    background: linear-gradient(135deg, #d1ecf1, #b8daff);
    color: #0c5460;
    border: 1px solid #b8daff;
}

@media (max-width: 768px) {
    .score-distribution-container .input-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .score-distribution-container input[type="number"] {
        width: 100%;
        max-width: 200px;
    }
    
    .score-distribution-container button {
        width: 100%;
        max-width: 200px;
    }
    
    .score-distribution-container .stats {
        grid-template-columns: 1fr;
    }
}