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

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    min-height: 100vh;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header {
    background-color: #d32f2f;
    color: white;
    padding: 1rem;
    text-align: center;
}

header h1 {
    font-size: 1.5rem;
    font-weight: bold;
}

main {
    padding: 1rem;
}

.section {
    margin-bottom: 2rem;
    background-color: #fff;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.section h2 {
    color: #d32f2f;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: 2px solid #d32f2f;
    padding-bottom: 0.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group h3 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #555;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

button {
    padding: 0.75rem 1rem;
    border: 2px solid #ddd;
    background-color: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

button:hover {
    background-color: #f0f0f0;
    border-color: #d32f2f;
}

button.selected {
    background-color: #d32f2f;
    color: white;
    border-color: #d32f2f;
}

button.selected:hover {
    background-color: #b71c1c;
}

.round-btn, .position-btn, .win-type-btn {
    flex: 1;
    min-width: 80px;
}

.yaku-category {
    margin-bottom: 1.5rem;
}

.yaku-category h3 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #666;
    background-color: #f8f9fa;
    padding: 0.5rem;
    border-radius: 4px;
}

.yaku-btn {
    min-width: 100px;
    flex: 1;
}

.dora-section {
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.dora-group {
    text-align: center;
}

.dora-group h3 {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.counter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.counter-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.counter-value {
    font-size: 1.2rem;
    font-weight: bold;
    min-width: 30px;
    text-align: center;
}

.han-display, .fu-display {
    background-color: #ffebee;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
    margin-top: 1rem;
}

.han-display h3, .fu-display h3 {
    color: #d32f2f;
    font-size: 1.1rem;
}

#total-han, #total-fu {
    color: #d32f2f;
    font-weight: bold;
    font-size: 1.3rem;
}

.fu-category {
    margin-bottom: 1.5rem;
}

.fu-category h3 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #666;
    background-color: #f8f9fa;
    padding: 0.5rem;
    border-radius: 4px;
}

.fu-btn, .atama-btn, .machi-btn {
    min-width: 120px;
    flex: 1;
}

.result-display {
    text-align: center;
    margin-bottom: 1.5rem;
}

#score-title {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.score-value {
    font-size: 2rem;
    font-weight: bold;
    color: #d32f2f;
    margin-bottom: 1rem;
}

.score-breakdown {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    line-height: 1.8;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.action-btn {
    background-color: #ff5722;
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.action-btn:hover {
    background-color: #e64a19;
}

@media (max-width: 480px) {
    .container {
        box-shadow: none;
    }
    
    main {
        padding: 0.5rem;
    }
    
    .section {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .button-group {
        gap: 0.25rem;
    }
    
    button {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .dora-section {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .counter-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .score-value {
        font-size: 1.5rem;
    }
    
    header h1 {
        font-size: 1.3rem;
    }
}

@media (max-width: 360px) {
    button {
        padding: 0.5rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .yaku-btn, .fu-btn, .atama-btn, .machi-btn {
        min-width: 90px;
    }
    
    .counter-btn {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }
}