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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #333;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.content {
    background: #1a1f3a;
    border-radius: 16px;
    padding: 60px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    text-align: center;
}

h1 {
    font-size: 32px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

.message {
    font-size: 16px;
    line-height: 1.8;
    color: #ffffff;
    margin-bottom: 40px;
}

.link-section {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.link-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.clove-link {
    display: inline-block;
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    text-decoration: none;
    padding: 16px 40px;
    border: 2px solid #ffffff;
    border-radius: 8px;
    transition: all 0.3s ease;
    background: transparent;
}

.clove-link:hover {
    background: #ffffff;
    color: #1a1f3a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.clove-link:active {
    transform: translateY(0);
}

@media (max-width: 640px) {
    .content {
        padding: 40px 24px;
    }

    h1 {
        font-size: 24px;
        margin-bottom: 24px;
    }

    .message {
        font-size: 14px;
        margin-bottom: 32px;
    }

    .clove-link {
        font-size: 18px;
        padding: 14px 32px;
    }
}