body {
    background-color: #f4f6f9;
    font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.back-link {
    position: absolute;
    top: 20px;
    left: 20px;
    color: #7f8c8d;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #2c3e50;
    text-decoration: underline;
}

.container {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 40px;
    text-align: center;
    max-width: 500px;
    width: 100%;
    transition: transform 0.3s ease;
    position: relative;
}

.container:hover {
    transform: scale(1.02);
}

h1 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
    font-size: 2.2rem;
}

p {
    color: #7f8c8d;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.btn {
    margin: 10px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-secondary {
    background-color: #2ecc71;
    border-color: #2ecc71;
    color: white;
}

.btn-primary:hover, .btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

@media (max-width: 576px) {
    .back-link {
        position: static;
        display: block;
        margin-bottom: 15px;
        text-align: center;
    }

    .container {
        padding: 20px;
        margin: 0 10px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
    }
}