* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #1f2346;
    color: white;
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-yellow {
    color: #f1c40f;
    border: 2px solid #f1c40f;
    background: #2c3e50;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-yellow:hover {
    background: #f1c40f;
    color: #1f2346;
}