:root {
    --primary-color: #21808D;
    --secondary-color: #E3F2FD;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --orange-color: #FF9800;
    --danger-color: #F44336;
    --text-primary: #134252;
    --text-secondary: #626C71;
    --background: #FCFCF9;
    --white: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

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

/* セクション管理 */
.section {
    display: none;
    min-height: 100vh;
    padding: 20px 0;
}

.section.active {
    display: block;
}

/* ウェルカムページ */
.welcome-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 0;
}

.main-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.5;
}

.info-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.info-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 25px;
}

.info-item {
    text-align: center;
    padding: 15px;
    background: var(--secondary-color);
    border-radius: 8px;
}

.info-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.info-item strong {
    color: var(--primary-color);
    font-weight: 600;
}

.privacy-note {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.start-btn {
    background: linear-gradient(135deg, var(--primary-color), #1a6b75);
    color: var(--white);
    border: none;
    padding: 20px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    text-transform: none;
    min-height: 56px;
    min-width: 200px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    background: linear-gradient(135deg, #1a6b75, var(--primary-color));
}

.start-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

/* 診断フォーム */
.assessment-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 0;
}

.progress-container {
    margin-bottom: 40px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #1a6b75);
    transition: width 0.5s ease;
    border-radius: 4px;
}

.progress-text {
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.question-container {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.question-category {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.question-text {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 30px;
    line-height: 1.4;
    font-weight: 600;
}

.answer-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option {
    display: flex;
    align-items: center;
    padding: 18px;
    background: #f8f9fa;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    min-height: 56px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.option:hover {
    background: var(--secondary-color);
    border-color: var(--primary-color);
}

.option:active {
    background: var(--secondary-color);
    border-color: var(--primary-color);
    transform: scale(0.98);
}

.option input[type="radio"] {
    margin-right: 15px;
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
    flex-shrink: 0;
}

.option input[type="radio"]:checked + .option-text {
    font-weight: 600;
    color: var(--primary-color);
}

.option:has(input[type="radio"]:checked) {
    background: var(--secondary-color);
    border-color: var(--primary-color);
}

.option-text {
    font-size: 1rem;
    flex: 1;
    line-height: 1.4;
}

.navigation {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.btn-prev, .btn-next {
    flex: 1;
    padding: 18px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    min-height: 56px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.btn-prev {
    background: #f8f9fa;
    color: var(--text-secondary);
    border: 2px solid #e9ecef;
}

.btn-prev:hover {
    background: #e9ecef;
    color: var(--text-primary);
}

.btn-prev:active {
    transform: scale(0.98);
}

.btn-prev:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-next {
    background: var(--primary-color);
    color: var(--white);
}

.btn-next:hover {
    background: #1a6b75;
    transform: translateY(-1px);
}

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

/* 結果表示 */
.results-content {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px 0;
}

.results-title {
    text-align: center;
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.stress-level-indicator {
    text-align: center;
    margin-bottom: 50px;
}

.level-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--white);
    font-weight: 600;
    box-shadow: var(--shadow-hover);
    position: relative;
}

.level-label {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.level-score {
    font-size: 2rem;
    font-weight: 700;
}

.level-percentage {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 5px;
}

.chart-container {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.chart-container h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

#radarChart {
    max-width: 100%;
    height: auto;
}

.interpretation, .recommendations {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.interpretation h3, .recommendations h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.result-description {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-primary);
}

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

.recommendation-list li {
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
    position: relative;
    padding-left: 25px;
}

.recommendation-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

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

.cta-section {
    background: linear-gradient(135deg, var(--primary-color), #1a6b75);
    color: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.cta-section h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.cta-section p {
    margin-bottom: 25px;
    opacity: 0.9;
    font-size: 1.05rem;
}

.cta-button {
    background: var(--white);
    color: var(--primary-color);
    border: none;
    padding: 18px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 56px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 255, 255, 0.3);
}

.cta-button:active {
    transform: translateY(0);
}

.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn-secondary {
    background: #f8f9fa;
    color: var(--text-secondary);
    border: 2px solid #e9ecef;
    padding: 15px 25px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 48px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.btn-secondary:hover {
    background: #e9ecef;
    color: var(--text-primary);
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* 予約フォーム */
.booking-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 0;
}

.booking-content h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 20px;
}

.booking-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.benefits-section {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.benefits-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

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

.benefits-list li {
    padding: 10px 0;
    position: relative;
    padding-left: 25px;
    color: var(--text-primary);
}

.benefits-list li:before {
    content: "🌟";
    position: absolute;
    left: 0;
}

.booking-form {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
    border: 1px solid var(--secondary-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1rem;
}

.required {
    color: var(--danger-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
    min-height: 48px;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 128, 141, 0.1);
}

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

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), #1a6b75);
    color: var(--white);
    border: none;
    padding: 20px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    min-height: 56px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.back-link {
    text-align: center;
    margin-top: 30px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    padding: 10px;
    min-height: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.btn-link:hover {
    color: #1a6b75;
}

.btn-link:active {
    transform: scale(0.98);
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease;
}

.modal-content {
    background: var(--white);
    margin: 15% auto;
    padding: 40px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.modal-content h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.modal-content p {
    margin-bottom: 25px;
    line-height: 1.6;
    color: var(--text-primary);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 48px;
    touch-action: manipulation;
    -webkit-appearance: none;
    -webkit-user-select: none;
    user-select: none;
}

.btn-primary:hover {
    background: #1a6b75;
}

.btn-primary:active {
    transform: scale(0.98);
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .main-title {
        font-size: 2rem;
        line-height: 1.3;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .info-item {
        padding: 20px 15px;
    }
    
    .start-btn {
        width: 100%;
        padding: 22px 20px;
        font-size: 1.1rem;
    }
    
    .question-container {
        padding: 25px 20px;
    }
    
    .question-text {
        font-size: 1.2rem;
        line-height: 1.5;
    }
    
    .option {
        padding: 20px 15px;
        min-height: 60px;
    }
    
    .option-text {
        font-size: 1rem;
        line-height: 1.4;
    }
    
    .level-circle {
        width: 160px;
        height: 160px;
    }
    
    .level-score {
        font-size: 1.6rem;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .navigation {
        flex-direction: column;
        gap: 12px;
    }
    
    .btn-prev, .btn-next {
        width: 100%;
        padding: 20px;
        font-size: 1rem;
    }
    
    .chart-container {
        padding: 20px 15px;
    }
    
    .results-content,
    .assessment-content,
    .booking-content {
        padding: 20px 0;
    }
    
    .cta-button {
        width: 100%;
        padding: 20px;
    }
    
    .btn-secondary {
        width: 100%;
        padding: 18px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 12px;
    }
    
    .main-title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.95rem;
    }
    
    .info-card {
        padding: 20px 15px;
    }
    
    .question-container {
        padding: 20px 15px;
    }
    
    .question-text {
        font-size: 1.1rem;
    }
    
    .option {
        padding: 18px 12px;
        min-height: 56px;
    }
    
    .option input[type="radio"] {
        width: 18px;
        height: 18px;
        margin-right: 12px;
    }
    
    .option-text {
        font-size: 0.95rem;
    }
    
    .level-circle {
        width: 140px;
        height: 140px;
    }
    
    .level-score {
        font-size: 1.4rem;
    }
    
    .level-label {
        font-size: 1rem;
    }
    
    .cta-section {
        padding: 25px 15px;
    }
    
    .booking-form {
        padding: 25px 15px;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 12px;
        font-size: 16px; /* iOS zoom prevention */
    }
    
    .modal-content {
        margin: 20% auto;
        padding: 25px 20px;
        width: 95%;
    }
}

/* 印刷スタイル */
@media print {
    body {
        background: white;
    }
    
    .section:not(#results) {
        display: none !important;
    }
    
    #results {
        display: block !important;
    }
    
    .cta-section,
    .action-buttons {
        display: none;
    }
    
    .chart-container {
        break-inside: avoid;
    }
    
    .results-content {
        padding: 0;
    }
}

/* タッチデバイス用の追加スタイル */
@media (hover: none) and (pointer: coarse) {
    .option:hover {
        background: #f8f9fa;
        border-color: transparent;
    }
    
    .btn-prev:hover,
    .btn-next:hover,
    .start-btn:hover,
    .cta-button:hover,
    .submit-btn:hover,
    .btn-secondary:hover,
    .btn-primary:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
    
    .option:active,
    .btn-prev:active,
    .btn-next:active,
    .start-btn:active,
    .cta-button:active,
    .submit-btn:active,
    .btn-secondary:active,
    .btn-primary:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
}