* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f7fe;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    text-align: center;
    max-width: 420px;
    width: 90%;
}

h1 {
    color: #1a202c;
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: #718096;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.info-box {
    background-color: #e3f2fd;
    color: #0d47a1;
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #3182ce;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.3s ease;
}

.btn:hover {
    background-color: #2b6cb0;
}