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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: #F8F9FA;
    color: #333;
    line-height: 1.6;
}

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

.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    background: linear-gradient(135deg, #33B5AE 0%, #2A9A94 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(51, 181, 174, 0.3);
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.site-description {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.input-section, .result-section {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.section-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: #33B5AE;
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    position: relative;
}

.form-label {
    font-weight: 500;
    font-size: 1.1rem;
    width: 120px;
    margin-right: 20px;
    color: #555;
}

.form-input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #DEEFF9;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #F8F9FA;
}

.form-input:focus {
    outline: none;
    border-color: #33B5AE;
    box-shadow: 0 0 0 3px rgba(51, 181, 174, 0.1);
}

.input-unit {
    margin-left: 15px;
    font-weight: 500;
    color: #666;
    font-size: 1.1rem;
}

.calculate-btn, .recalculate-btn {
    background: linear-gradient(135deg, #33B5AE 0%, #2A9A94 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
    margin: 30px auto 0;
    min-width: 200px;
}

.calculate-btn:hover, .recalculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(51, 181, 174, 0.4);
}

.calculate-btn:active, .recalculate-btn:active {
    transform: translateY(0);
}

.button-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.contact-btn {
    background: linear-gradient(135deg, #F84939 0%, #E63525 100%);
    color: white;
    text-decoration: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    min-width: 200px;
    text-align: center;
    border: none;
    margin: 0 auto;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(248, 73, 57, 0.4);
    color: white;
}

.contact-btn:active {
    transform: translateY(0);
}

.result-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.result-card {
    background: linear-gradient(135deg, #E5F6F5 0%, #DEEFF9 100%);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    border: 2px solid #33B5AE;
}

.result-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: #33B5AE;
    margin-bottom: 10px;
}

.result-description {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #33B5AE;
    margin: 20px 0;
}

.result-note {
    font-size: 1rem;
    color: #555;
    margin-top: 15px;
}

.highlight {
    color: #F84939;
    font-weight: 600;
}

.result-summary {
    background: #F8F9FA;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
}

.summary-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #33B5AE;
    margin-bottom: 15px;
}

.benefit-list {
    list-style: none;
    padding-left: 0;
}

.benefit-list li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
    font-size: 1.05rem;
}

.benefit-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #33B5AE;
    font-weight: bold;
    font-size: 1.2rem;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.footer-note {
    color: #555555;
    font-size: 0.9rem;
    font-weight: 500;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    .site-description {
        font-size: 1rem;
    }
    
    .input-section, .result-section {
        padding: 25px;
    }
    
    .form-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-label {
        width: auto;
        margin-bottom: 8px;
        margin-right: 0;
    }
    
    .input-unit {
        margin-left: 0;
        margin-top: 8px;
    }
    
    .result-cards {
        grid-template-columns: 1fr;
    }
    
    .result-value {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.7rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .calculate-btn, .recalculate-btn, .contact-btn {
        padding: 12px 30px;
        font-size: 1rem;
        min-width: 160px;
    }
    
    .button-group {
        flex-direction: column;
        gap: 15px;
    }
    
    .result-value {
        font-size: 1.8rem;
    }
}