* {
    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;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 50%, #fcd34d 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(251, 191, 36, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(252, 211, 77, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.container {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 32px;
    padding: 48px;
    max-width: 1000px;
    width: 100%;
    box-shadow: 
        0 0 0 1px rgba(16, 185, 129, 0.1),
        0 20px 60px rgba(0, 0, 0, 0.4),
        0 0 100px rgba(16, 185, 129, 0.1);
    position: relative;
    z-index: 1;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

h1 {
    color: #78350f;
    margin-bottom: 12px;
    font-size: 2.8em;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 20px rgba(245, 158, 11, 0.2);
}

.subtitle {
    color: #475569;
    font-size: 1em;
    font-weight: 500;
    letter-spacing: 0.02em;
}

#score {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    margin-bottom: 40px;
    padding: 24px 32px;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-radius: 20px;
    border: 2px solid #fbbf24;
    box-shadow: 0 4px 20px rgba(251, 191, 36, 0.2);
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.score-label {
    font-size: 0.8em;
    color: #92400e;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score-value {
    font-size: 2.2em;
    font-weight: 800;
    color: #f59e0b;
    line-height: 1;
}

.score-divider {
    font-size: 2em;
    color: #6ee7b7;
    font-weight: 300;
}

#quiz-container {
    margin-top: 20px;
}

.question-header {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 32px;
    border-radius: 20px;
    margin-bottom: 32px;
    box-shadow: 0 8px 32px rgba(245, 158, 11, 0.2);
    position: relative;
    overflow: hidden;
    border: 3px solid #fbbf24;
}

.question-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #fbbf24, #f59e0b, #fbbf24);
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

#sport-name {
    color: #f59e0b;
    font-size: 1.8em;
    margin-bottom: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
}

#action-name {
    color: #78350f;
    font-size: 2.2em;
    margin-bottom: 16px;
    font-weight: 700;
    line-height: 1.3;
}

.action-explanation {
    color: #92400e;
    font-size: 1em;
    line-height: 1.8;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    border: 2px solid #fcd34d;
    backdrop-filter: blur(10px);
}

.question {
    font-size: 1.3em;
    color: #78350f;
    margin-bottom: 28px;
    font-weight: 600;
    text-align: center;
    padding: 16px;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-radius: 16px;
    border: 2px solid #fbbf24;
}

.question strong {
    color: #dc2626;
    font-weight: 800;
}

.content-wrapper {
    display: flex;
    gap: 30px;
    margin-bottom: 20px;
}

#body-diagram {
    flex: 0 0 200px;
}

.body-svg {
    width: 100%;
    height: auto;
    background: white;
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.muscle {
    transition: all 0.3s;
}

.muscle.highlight {
    fill: #fbbf24 !important;
    opacity: 1 !important;
}

.muscle.used {
    fill: #60a5fa !important;
    opacity: 0.8 !important;
}

.muscle.unused {
    fill: #f87171 !important;
    opacity: 0.8 !important;
}

#options {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option-container {
    width: 100%;
}

.option-btn {
    width: 100%;
    padding: 20px 28px;
    font-size: 1.15em;
    border: 3px solid #e2e8f0;
    background: white;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
    font-weight: 600;
    color: #1e293b;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
}

.option-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.1), transparent);
    transition: left 0.5s;
}

.option-btn:hover::before {
    left: 100%;
}

.option-btn span {
    display: block;
    position: relative;
    z-index: 1;
}

.option-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-color: #fbbf24;
    transform: translateX(12px) scale(1.02);
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.3);
}

.option-btn:disabled {
    cursor: not-allowed;
}

.option-btn.correct {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border-color: #10b981;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
    transform: scale(1.03);
}

.option-btn.wrong {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border-color: #ef4444;
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

#feedback {
    padding: 20px;
    border-radius: 12px;
    font-size: 1.2em;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#feedback.correct {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border: 2px solid #10b981;
}

#feedback.wrong {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    border: 2px solid #ef4444;
}

#explanation {
    padding: 24px;
    border-radius: 12px;
    font-size: 1em;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #78350f;
    border-left: 5px solid #f59e0b;
    line-height: 1.8;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
}

#explanation strong {
    color: #92400e;
    font-size: 1.1em;
}

#next-btn {
    width: 100%;
    padding: 18px;
    font-size: 1.2em;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

#next-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(251, 191, 36, 0.4);
}

/* ホーム画面 */
.home-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 40px;
}

.final-check-btn {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border: none;
    border-radius: 20px;
    padding: 40px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.3);
    color: white;
    text-align: center;
}

.final-check-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(251, 191, 36, 0.4);
}

.btn-icon {
    font-size: 3.5em;
    margin-bottom: 12px;
}

.btn-title {
    font-size: 2em;
    font-weight: 800;
    margin-bottom: 8px;
}

.btn-desc {
    font-size: 1.1em;
    opacity: 0.95;
}

.sport-btn {
    background: white;
    border: 3px solid #fbbf24;
    border-radius: 16px;
    padding: 24px 16px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.15);
}

.sport-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(251, 191, 36, 0.3);
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.btn-emoji {
    font-size: 3em;
}

.btn-text {
    font-size: 1.1em;
    font-weight: 700;
    color: #78350f;
}

.back-btn {
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 12px 24px;
    background: white;
    border: 2px solid #fbbf24;
    border-radius: 12px;
    color: #92400e;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1em;
}

.back-btn:hover {
    background: #fef3c7;
    transform: scale(1.05);
}

/* レビュー画面 */
.review-card {
    background: white;
    border: 3px solid #fbbf24;
    border-radius: 20px;
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.15);
}

.review-action {
    font-size: 1.5em;
    font-weight: 700;
    color: #78350f;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-hint {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 16px;
    color: #92400e;
    font-size: 1em;
    border: 2px solid #fcd34d;
}

.review-muscles {
    margin-bottom: 16px;
}

.review-section-title {
    font-size: 1.1em;
    font-weight: 700;
    margin-bottom: 12px;
    color: #78350f;
}

.muscle-item {
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 12px;
    font-size: 1em;
}

.muscle-used {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border: 2px solid #10b981;
    color: #065f46;
}

.muscle-unused {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border: 2px solid #ef4444;
    color: #991b1b;
}

.muscle-name {
    font-weight: 700;
    font-size: 1.1em;
}

.muscle-role {
    font-size: 0.9em;
    margin-top: 4px;
    opacity: 0.9;
}

.review-explanation {
    background: #fffbeb;
    padding: 16px;
    border-radius: 12px;
    border-left: 4px solid #fbbf24;
    color: #78350f;
    line-height: 1.8;
    font-size: 0.95em;
}

@media (max-width: 768px) {
    .mode-btn {
        padding: 24px 32px;
    }
    
    .mode-icon {
        font-size: 2.5em;
    }
    
    .mode-title {
        font-size: 1.4em;
    }
    
    .mode-desc {
        font-size: 0.9em;
    }
    
    .sport-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 16px;
    }
    
    .sport-card {
        padding: 24px 16px;
    }
    
    .sport-icon {
        font-size: 2.5em;
    }
    
    .sport-name {
        font-size: 1.1em;
    }
    
    .back-btn {
        position: static;
        margin-bottom: 16px;
        width: 100%;
    }
    
    .review-card {
        padding: 20px;
    }
    
    .review-action {
        font-size: 1.3em;
    }
    
    .content-wrapper {
        flex-direction: column;
    }
    
    #body-diagram {
        flex: 0 0 auto;
        max-width: 250px;
        margin: 0 auto 20px;
    }
    
    #score {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .score-value {
        font-size: 1.5em;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 24px;
    }
    
    h1 {
        font-size: 1.6em;
    }
    
    .subtitle {
        font-size: 0.85em;
    }
    
    #action-name {
        font-size: 1.4em;
    }
    
    .question-header {
        padding: 16px;
    }
    
    .action-explanation {
        font-size: 0.9em;
    }
    
    .option-btn {
        padding: 14px 18px;
        font-size: 1em;
    }
}