:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --accent: #f43f5e;
            --success: #10b981;
        }

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

        body {
            font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
            color: #1e293b;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 30px 20px;
        }

        .container {
            width: 100%;
            max-width: 500px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 30px;
            padding: 45px 35px;
            box-shadow: 0 25px 80px rgba(0, 0, 0, 0.2);
            text-align: center;
            animation: cardFloat 0.6s ease-out;
        }

        @keyframes cardFloat {
            from {
                opacity: 0;
                transform: translateY(30px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* プロフィール */
        .logo-wrapper {
            position: relative;
            display: inline-block;
            margin-bottom: 20px;
        }

        .profile-img {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid rgba(255, 255, 255, 0.8);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
            background-color: #fff;
            transition: transform 0.3s;
        }

        .logo-wrapper:hover .profile-img {
            transform: scale(1.05);
        }

        .logo-edit-overlay {
            display: none;
            position: absolute;
            bottom: 5px;
            right: 5px;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent) 0%, #ec4899 100%);
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: white;
            font-size: 14px;
            box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
            transition: transform 0.2s;
        }

        .logo-edit-overlay:hover {
            transform: scale(1.1);
        }

        .logo-wrapper.admin-mode .logo-edit-overlay {
            display: flex;
        }

        .logo-wrapper.admin-mode .profile-img {
            cursor: pointer;
        }

        .profile-name {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }

        .profile-bio {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        /* リンクボタン */
        .links-section {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .link-card {
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            padding: 16px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            position: relative;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .link-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .link-icon {
            font-size: 1.3rem;
            position: absolute;
            left: 22px;
        }

        .btn-x {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
        }

        .btn-line {
            background: linear-gradient(135deg, #06C755 0%, #00a63f 100%);
            color: #fff;
        }

        .btn-internal {
            background: rgba(255, 255, 255, 0.95);
            color: #1e293b;
        }

        .btn-internal:hover {
            background: white;
        }

        .btn-internal .link-icon {
            color: var(--primary);
        }

        .btn-admin {
            background: linear-gradient(135deg, var(--accent) 0%, #ec4899 100%);
            color: #fff;
        }

        /* 管理者メニュー */
        .admin-menu {
            display: none;
            margin-top: 25px;
            padding: 20px;
            background: rgba(244, 63, 94, 0.15);
            border: 1px solid rgba(244, 63, 94, 0.3);
            border-radius: 20px;
        }

        .admin-menu.show {
            display: block;
        }

        .admin-title {
            color: white;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .admin-menu .link-card {
            margin-bottom: 0;
        }

        .admin-hint {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 12px;
        }

        /* フッター */
        footer {
            margin-top: 30px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.8rem;
        }

        #logoStatus {
            font-size: 0.75rem;
            color: white;
            margin-top: 8px;
        }

        /* レスポンシブ */
        @media (max-width: 480px) {
            body {
                padding: 20px 15px;
            }

            .container {
                padding: 35px 25px;
                border-radius: 24px;
            }

            .profile-img {
                width: 100px;
                height: 100px;
            }

            .profile-name {
                font-size: 1.6rem;
            }

            .profile-bio {
                font-size: 0.9rem;
            }

            .link-card {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .link-icon {
                font-size: 1.2rem;
                left: 18px;
            }
        }

        @media (min-width: 768px) {
            .container {
                max-width: 550px;
                padding: 55px 45px;
            }

            .profile-img {
                width: 140px;
                height: 140px;
            }

            .profile-name {
                font-size: 2.2rem;
            }
        }

        /* PC用ナビゲーション */
        .desktop-nav {
            display: none;
            /* デフォルト非表示 */
        }

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
                position: absolute;
                top: 30px;
                right: 40px;
                align-items: center;
                gap: 25px;
                z-index: 1000;
            }

            .desktop-nav a {
                color: rgba(255, 255, 255, 0.9);
                text-decoration: none;
                font-weight: 700;
                font-size: 0.95rem;
                letter-spacing: 0.5px;
                transition: color 0.3s, transform 0.2s;
                text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
            }

            .desktop-nav a:hover {
                color: #fff;
                transform: translateY(-2px);
            }

            .nav-icons {
                display: flex;
                align-items: center;
                gap: 15px;
                margin-left: 10px;
            }

            .nav-icons .icon-circle {
                width: 30px;
                height: 30px;
                background: rgba(255, 255, 255, 0.2);
                border-radius: 50%;
                display: block;
                transition: background 0.3s;
            }

            .nav-icons .icon-circle:hover {
                background: rgba(255, 255, 255, 0.4);
            }

            .nav-icons i {
                font-size: 1.4rem;
            }
        }