body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #d1e7ff, #e0f7fa);
    margin: 0;
    padding: 0;
    color: #2c3e50;
    text-align: center;
}

h1 {
    color: #2c3e50;
    font-size: 2.2em;
    margin-top: 30px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.05);
}

.line {
    height: 4px;
    background: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
    border: none;
    border-radius: 2px;
    margin: 10px auto;
}

.back-button {
    display: inline-block;
    margin: 20px;
    padding: 12px 24px;
    background: rgba(44, 62, 80, 0.15);
    color: #2c3e50;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: background 0.3s ease, transform 0.2s ease;
    margin-top: 30px;
}

.back-button:hover {
    background: rgba(44, 62, 80, 0.25);
    transform: translateY(-2px);
}