body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background-color: #f5f5f5;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            flex-direction: column;
        }

        header {
            position: fixed;
            top: 0;
            width: 100%;
            height: 80px;
            background-color: #333;
            color: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
            z-index: 1000;
            box-sizing: border-box;
        }

        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            background-color: #333;
            color: white;
        }

        h1 {
            width: 250px;
            margin: 0;
        }

        .wrapper {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ハンバーガーメニューボタン */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 5px;
            margin-right: 15px;
        }

        /* メニューとソーシャルアイコンのコンテナ */
        .menu-social-container {
            display: flex;
            align-items: center;
        }

        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 3px 0;
            transition: 0.3s;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(-45deg) translate(-7px, 6px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(45deg) translate(-7px, -6px);
        }

        nav ul {
            list-style-type: none;
            margin: 0;
            padding: 0;
            display: flex;
        }

        nav ul li {
            margin: 0 20px;
        }

        nav ul li a {
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            text-decoration: none;
            padding: 10px;
            border-radius: 5px;
            transition: background-color 0.3s ease;
        }

        nav ul li a:hover {
            background-color: #0ff;
            color: black;
        }

        .content-section {
            text-align: left;
            margin: 20px 10px;
            padding: 30px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            color: black;
        }

        #education {
            margin: 10px;
            padding: 0;
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            color: black;
            margin-top: 100px;
            overflow: hidden;
            position: relative;
        }

        #education::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #0ff, #00cccc, #0099cc);
        }

        .me {
            position: relative;
        }

        .main-content {
            display: flex;
            justify-content: space-around;
            margin-top: 10px;
        }

        section {
            flex: 1 1 calc(25% - 40px);
            margin: 10px;
            padding: 0px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            min-width: 10px;
            text-align: center;
            color: white;
            margin-top: 120px;
        }

        section:hover {
            background-color: #f0f0f0;
            cursor: pointer;
            color: #333;
        }

        #education h2 {
            color: #333;
            text-align: center;
            margin: 0;
            padding: 30px 20px 20px;
            font-size: 2em;
            font-weight: 300;
            letter-spacing: 1px;
            border-bottom: none;
            background: linear-gradient(135deg, #333 0%, #555 100%);
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        h3 {
            color: #333;
            margin-top: 25px;
            margin-bottom: 15px;
            font-size: 1.2em;
        }

        h2 {
            color: #333;
            text-align: center;
            border-bottom: 3px solid #0ff;
            padding-bottom: 10px;
            margin-bottom: 25px;
        }

        footer {
            width: 100%;
            background-color: #333;
            text-align: center;
            color: #f0f0f0;
            padding: 20px 0;
            position: relative;
            bottom: 0;
        }

        main {
            flex: 1;
        }

        .section-link {
            display: block;
            text-decoration: none;
            color: #333;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .section-link:hover {
            background-color: #0ff;
        }

        .flex {
            display: flex;
            align-items: flex-start;
            gap: 30px;
            padding: 20px 30px 40px;
        }

        .flex .left {
            flex: 1;
            margin: 0;
            padding: 20px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 255, 255, 0.1);
        }

        .flex .me {
            flex-shrink: 0;
            margin: 0;
            position: relative;
        }

        .flex .me::before {
            content: '';
            position: absolute;
            top: -10px;
            left: -10px;
            right: -10px;
            bottom: -10px;
            background: linear-gradient(45deg, #0ff, transparent, #0ff);
            border-radius: 20px;
            z-index: -1;
            opacity: 0.3;
        }

        .flex .me img {
            max-width: 280px;
            width: 100%;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .flex .me img:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
        }

        .flex .title {
            margin: 0 0 20px 0;
            padding: 0;
            font-weight: 700;
            font-size: 28px;
            text-align: center;
            color: #333;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            position: relative;
        }

        .flex .title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, #0ff, #00cccc);
            border-radius: 2px;
        }

        .flex .text {
            margin: 20px 0;
            padding: 15px;
            text-align: left;
            line-height: 1.8;
            color: #444;
            background: rgba(0, 255, 255, 0.03);
            border-left: 4px solid #0ff;
            border-radius: 0 8px 8px 0;
            transition: all 0.3s ease;
        }

        .flex .text:hover {
            background: rgba(0, 255, 255, 0.08);
            transform: translateX(5px);
        }

        .flex .text a {
            color: #0099cc;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .flex .text a:hover {
            color: #0ff;
            text-decoration: underline;
        }

        .name-reading {
            font-size: 16px;
            color: #666;
            font-weight: 400;
            margin-bottom: 10px;
            text-align: center;
            letter-spacing: 2px;
        }

        .research-list {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .research-item {
            margin: 8px 0;
            padding: 12px 15px;
            background: rgba(0, 255, 255, 0.05);
            border-left: 3px solid #0ff;
            border-radius: 0 6px 6px 0;
            transition: all 0.3s ease;
            position: relative;
        }

        .research-item:hover {
            background: rgba(0, 255, 255, 0.1);
            transform: translateX(3px);
        }

        .research-item::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 50%;
            transform: translateY(-50%);
            background: #0ff;
            width: 16px;
            height: 16px;
            border-radius: 50%;
        }

        .top_text {
            margin-top: 120px;
        }

        .container {
            text-align: center;
            padding: 10px;
        }

        /* ソーシャルアイコンのスタイル */
        .social-icons {
            display: flex;
            gap: 15px;
        }

        .social-link {
            color: white;
            font-size: 1.5rem;
            transition: color 0.3s ease, transform 0.3s ease;
        }

        .social-link:hover {
            color: #1DA1F2;
            transform: scale(1.2);
        }

        .social-link:nth-child(2):hover {
            color: #E1306C;
        }

        /* モバイルメニュー用のスタイル */
        .mobile-nav {
            position: fixed;
            top: 80px;
            left: -100%;
            width: 100%;
            height: calc(100vh - 80px);
            background-color: #333;
            transition: left 0.3s ease;
            z-index: 999;
            display: none;
        }

        .mobile-nav.active {
            left: 0;
        }

        .mobile-nav ul {
            list-style-type: none;
            margin: 0;
            padding: 20px 0;
            display: flex;
            flex-direction: column;
            height: 100%;
            justify-content: flex-start;
        }

        .mobile-nav ul li {
            margin: 10px 0;
            width: 100%;
            text-align: center;
        }

        .mobile-nav ul li a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 15px;
            font-size: 1.2rem;
            width: 100%;
            transition: background-color 0.3s ease;
        }

        .mobile-nav ul li a:hover {
            background-color: #0ff;
            color: black;
        }

        /* 経歴関連のスタイル */
        .timeline-item {
            display: flex;
            margin-bottom: 20px;
            padding: 15px;
            background-color: #f9f9f9;
            border-radius: 8px;
            border-left: 4px solid #0ff;
        }

        .timeline-date {
            flex-shrink: 0;
            width: 120px;
            font-weight: bold;
            color: #666;
            margin-right: 20px;
        }

        .timeline-content {
            flex: 1;
        }

        .timeline-title {
            font-weight: bold;
            color: #333;
            margin-bottom: 5px;
        }

        .timeline-description {
            color: #666;
            font-size: 0.95em;
            line-height: 1.5;
        }

        .skill-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .skill-category {
            background-color: #f9f9f9;
            padding: 20px;
            border-radius: 8px;
            border-top: 4px solid #0ff;
        }

        .skill-category h4 {
            margin: 0 0 15px 0;
            color: #333;
            font-size: 1.1em;
        }

        .skill-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .skill-list li {
            padding: 5px 0;
            color: #666;
            border-bottom: 1px solid #eee;
        }

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

        .achievement-item {
            background-color: #f0f8ff;
            padding: 15px;
            margin-bottom: 15px;
            border-radius: 8px;
            border-left: 4px solid #0066cc;
        }

        .achievement-title {
            font-weight: bold;
            color: #0066cc;
            margin-bottom: 5px;
        }

        .achievement-description {
            color: #666;
            font-size: 0.95em;
        }

        /* レスポンシブデザイン */
        @media screen and (max-width: 768px) {
            .hamburger {
                display: flex;
            }

            /* デスクトップ用のnavを非表示 */
            .header-content > nav {
                display: none;
            }

            /* モバイルナビを表示 */
            .mobile-nav {
                display: block;
            }

            h1 {
                font-size: 1.2rem;
                width: auto;
            }

            .flex {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }

            .flex .me {
                order: -1;
                margin: 20px 0;
            }

            .flex .me img {
                max-width: 250px;
            }

            .flex .left {
                margin: 0;
            }

            .flex .text {
                margin: 15px;
                padding: 5px;
                text-align: center;
            }

            .flex .title {
                font-size: 20px;
            }

            #education {
                margin: 10px 5px;
                margin-top: 90px;
            }

            .content-section {
                margin: 10px 5px;
                padding: 20px;
            }

            .social-icons {
                gap: 10px;
            }

            .social-link {
                font-size: 1.3rem;
            }

            .timeline-item {
                flex-direction: column;
            }

            .timeline-date {
                width: auto;
                margin-right: 0;
                margin-bottom: 10px;
            }

            .skill-grid {
                grid-template-columns: 1fr;
            }
        }

        @media screen and (max-width: 480px) {
            header {
                padding: 0 15px;
                height: 70px;
            }

            h1 {
                font-size: 1rem;
            }

            .flex .me img {
                max-width: 200px;
            }

            .flex .title {
                font-size: 18px;
            }

            .flex .text {
                margin: 10px;
                font-size: 14px;
            }

            #education {
                margin-top: 80px;
            }

            .content-section {
                padding: 15px;
            }

            .mobile-nav {
                top: 70px;
                height: calc(100vh - 70px);
            }
        }