/* ========================================
   講師セクションの最適化
======================================== */
.instructor {
    padding: 4rem 0;
    background: var(--bg-light);
}

.instructor-section {
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.instructor-image {
    flex: 0 0 auto;
}

.instructor-image img {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 8px 30px rgba(255, 130, 178, 0.3);
    border: 6px solid var(--primary-color);
}

.instructor-content {
    flex: 1;
}

.instructor-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--primary-dark);
    line-height: 1.5;
}

.instructor-content .credentials {
    background: white;
    padding: 1.2rem 1.8rem;
    border-radius: 25px;
    margin-bottom: 1.5rem;
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
}

.instructor-content .credentials p {
    margin: 0;
    color: var(--primary-dark);
    font-weight: 600;
}

.instructor-content > p {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-gray);
    margin-bottom: 1rem;
}

/* ========================================
   レスポンシブ対応（講師セクション）
======================================== */
@media (max-width: 768px) {
    .instructor-section {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .instructor-image {
        justify-self: center;
    }
    
    .instructor-image img {
        width: 220px;
        height: 220px;
    }
}

@media (max-width: 480px) {
    .instructor-image img {
        width: 180px;
        height: 180px;
        border: 4px solid var(--primary-color);
    }
    
    .instructor-content h3 {
        font-size: 1.5rem;
    }
}