Registration-Form/404.html at main · Flint8777/Registration-Form · GitHub

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<!DOCTYPE html>
<html lang="ja">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ページが見つかりません - 気仙沼星空観望会</title>
    <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&display=swap"
        rel="stylesheet">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Noto Sans JP', sans-serif;
            background: linear-gradient(135deg, #0f1419 0%, #1a252f 50%, #2d3748 100%);
            color: #ffffff;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        /* 星空背景効果 */
        .stars {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }

        .star {
            position: absolute;
            background: #ffffff;
            border-radius: 50%;
            animation: twinkle 2s infinite;
        }

        .star:nth-child(1) {
            top: 20%;
            left: 20%;
            width: 2px;
            height: 2px;
            animation-delay: 0s;
        }

        .star:nth-child(2) {
            top: 30%;
            left: 80%;
            width: 1px;
            height: 1px;
            animation-delay: 0.5s;
        }

        .star:nth-child(3) {
            top: 70%;
            left: 30%;
            width: 3px;
            height: 3px;
            animation-delay: 1s;
        }

        .star:nth-child(4) {
            top: 40%;
            left: 60%;
            width: 1px;
            height: 1px;
            animation-delay: 1.5s;
        }

        .star:nth-child(5) {
            top: 80%;
            left: 70%;
            width: 2px;
            height: 2px;
            animation-delay: 2s;
        }

        .star:nth-child(6) {
            top: 15%;
            left: 50%;
            width: 1px;
            height: 1px;
            animation-delay: 0.3s;
        }

        .star:nth-child(7) {
            top: 60%;
            left: 10%;
            width: 2px;
            height: 2px;
            animation-delay: 0.8s;
        }

        .star:nth-child(8) {
            top: 25%;
            left: 90%;
            width: 1px;
            height: 1px;
            animation-delay: 1.3s;
        }

        @keyframes twinkle {

            0%,
            100% {
                opacity: 0.3;
            }

            50% {
                opacity: 1;
            }
        }

        .container {
            text-align: center;
            z-index: 1;
            max-width: 600px;
            padding: 2rem;
        }

        .error-code {
            font-size: 8rem;
            font-weight: 700;
            background: linear-gradient(45deg, #4299e1, #805ad5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
            line-height: 1;
        }

        .error-title {
            font-size: 2rem;
            font-weight: 500;
            margin-bottom: 1rem;
            color: #e2e8f0;
        }

        .error-description {
            font-size: 1.1rem;
            color: #a0aec0;
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        .logo {
            width: 80px;
            height: 80px;
            margin: 0 auto 2rem;
            border-radius: 50%;
            object-fit: contain;
            filter: brightness(0.9);
        }

        .actions {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: center;
        }

        .btn {
            padding: 12px 24px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            min-width: 200px;
        }

        .btn-primary {
            background: linear-gradient(45deg, #4299e1, #805ad5);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(66, 153, 225, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: #e2e8f0;
            border: 2px solid #4a5568;
        }

        .btn-secondary:hover {
            background: #4a5568;
            color: white;
        }

        .search-box {
            margin-top: 2rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: center;
        }

        .search-input {
            padding: 12px 16px;
            border-radius: 8px;
            border: 2px solid #4a5568;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 1rem;
            width: 100%;
            max-width: 300px;
        }

        .search-input::placeholder {
            color: #a0aec0;
        }

        @media (max-width: 768px) {
            .error-code {
                font-size: 6rem;
            }

            .error-title {
                font-size: 1.5rem;
            }

            .container {
                padding: 1rem;
            }
        }
    </style>
</head>

<body>
    <div class="stars">
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
        <div class="star"></div>
    </div>

    <div class="container">
        <img src="Images/観望会ロゴタイプ_黒.png" alt="気仙沼星空観望会ロゴ" class="logo">

        <div class="error-code">404</div>

        <h1 class="error-title">ページが見つかりません</h1>

        <p class="error-description">
            お探しのページは移動されたか、削除された可能性があります。<br>
            星空観望会の予約は下記のボタンからお進みください。
        </p>

        <div class="actions">
            <a href="index.html" class="btn btn-primary">
                🌟 予約ページに戻る
            </a>

            <button class="btn btn-secondary" onclick="history.back()">
                ← 前のページに戻る
            </button>
        </div>

        <div class="search-box">
            <p style="color: #a0aec0; font-size: 0.9rem;">お探しのページが見つからない場合：</p>
            <input type="text" class="search-input" placeholder="キーワードで検索..." id="searchInput">
            <button class="btn btn-secondary" onclick="performSearch()">検索</button>
        </div>
    </div>

    <script>
        // 簡単な検索機能
        function performSearch() {
            const searchTerm = document.getElementById('searchInput').value.trim();
            if (searchTerm) {
                // Google検索に転送
                const searchUrl = `https://www.google.com/search?q=site:flint8777.github.io/TEST_KesenNuma-StarryNight/ ${encodeURIComponent(searchTerm)}`;
                window.open(searchUrl, '_blank');
            }
        }

        // エンターキーで検索
        document.getElementById('searchInput').addEventListener('keypress', function (e) {
            if (e.key === 'Enter') {
                performSearch();
            }
        });

        // 自動リダイレクト（オプション）
        setTimeout(() => {
            if (confirm('5秒後に予約ページに自動転送されます。今すぐ移動しますか？')) {
                window.location.href = 'index.html';
            }
        }, 5000);
    </script>
</body>

</html>