/* Reset cơ bản */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Toàn trang */
body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Khung chứa */
.container {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    text-align: center;
    width: 350px;
}

/* Tiêu đề */
.container h1 {
    margin-bottom: 25px;
    color: #333;
    font-size: 28px;
}

/* Các nút link */
.container a {
    display: block;
    text-decoration: none;
    background: #007bff;
    color: white;
    padding: 14px;
    margin: 12px 0;
    border-radius: 10px;
    font-size: 18px;
    transition: 0.3s ease;
}

/* Hiệu ứng hover */
.container a:hover {
    background: #0056b3;
    transform: translateY(-3px);
}