.about-section {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 32px;
    margin-bottom: 24px;
}

.about-section h2 {
    font-size: 21px;
    font-weight: 600;
    color: #333;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e0e0e0;
}

.about-section p {
    font-size: 15px;
    color: #444;
    line-height: 1.8;
    margin-bottom: 12px;
}

.about-section p:last-child {
    margin-bottom: 0;
}

.profile-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e0e0e0;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    background-color: #f0f0f0;
    flex-shrink: 0;
}

.profile-info {
    flex: 1;
}

.profile-name {
    font-size: 25px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
    margin-top: 0;
}

.profile-details {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

.profile-details-item {
    margin-bottom: 4px;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.skill-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: #f0f0f0;
    color: #666;
    font-size: 15px;
    border-radius: 3px;
}

.experience-item {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e0e0e0;
}

.experience-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.experience-title {
    font-size: 17px;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.experience-company {
    font-size: 15px;
    color: #666;
    margin-bottom: 8px;
}

.experience-period {
    font-size: 14px;
    color: #999;
    margin-bottom: 8px;
}

.experience-description {
    font-size: 15px;
    color: #666;
    line-height: 1.6;
}

.contact-info {
    list-style: none;
}

.contact-info li {
    padding: 12px 0;
    border-bottom: 1px solid #e0e0e0;
    font-size: 15px;
}

.contact-info li:last-child {
    border-bottom: none;
}

.contact-label {
    font-weight: 600;
    color: #333;
    margin-right: 12px;
    display: inline-block;
    min-width: 100px;
}

.contact-value {
    color: #666;
}

.contact-value a {
    color: #333;
    text-decoration: none;
}

.contact-value a:hover {
    text-decoration: underline;
}

/* 開発スキルセクション */
.skill-category {
    margin-bottom: 32px;
}

.skill-category h3 {
    font-size: 19px;
    font-weight: 600;
    color: #333;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid #e0e0e0;
}

.skill-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 1024px) {
    .skill-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .skill-grid {
        grid-template-columns: 1fr;
    }
}

.skill-item {
    display: flex;
    align-items: center;
    padding: 12px;
    background-color: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.skill-item:hover {
    background-color: #f5f5f5;
}

.skill-icon {
    width: 32px;
    height: 32px;
    margin-right: 12px;
    flex-shrink: 0;
}

.skill-info {
    flex: 1;
}

.skill-name {
    font-size: 17px;
    font-weight: 500;
    color: #333;
    margin-bottom: 4px;
}

.skill-years {
    font-size: 15px;
    color: #666;
}

.skill-level {
    font-size: 15px;
    color: #555;
    margin-top: 2px;
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.expertise-tag {
    display: inline-block;
    padding: 6px 14px;
    background-color: #e8f4f8;
    color: #2c5f7d;
    font-size: 15px;
    border-radius: 3px;
}

.project-item {
    margin-bottom: 24px;
    padding: 20px;
    background-color: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.project-title {
    font-size: 19px;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.project-period {
    font-size: 15px;
    color: #999;
    white-space: nowrap;
    margin-left: 16px;
}

.project-role {
    font-size: 17px;
    color: #666;
    margin-bottom: 8px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.tech-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 3px;
    font-size: 14px;
    color: #666;
}

.tech-badge-icon {
    width: 14px;
    height: 14px;
    margin-right: 4px;
}

.project-description {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 8px;
}

.project-description strong {
    color: #333;
    font-weight: 600;
}

.project-team {
    font-size: 14px;
    color: #999;
    margin-top: 8px;
}

@media (max-width: 768px) {
    .about-section {
        padding: 20px;
    }
    
    .about-section h2 {
        font-size: 19px;
    }
    
    .profile-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-image {
        width: 120px;
        height: 120px;
    }
    
    .profile-name {
        font-size: 21px;
    }
}

@media (max-width: 480px) {
    .about-section {
        padding: 16px;
    }
    
    .profile-image {
        width: 100px;
        height: 100px;
    }
    
    .profile-name {
        font-size: 19px;
    }
    
    .skill-grid {
        grid-template-columns: 1fr;
    }
    
    .project-header {
        flex-direction: column;
    }
    
    .project-period {
        margin-left: 0;
        margin-top: 4px;
    }
}