/* Fullscreen background using your image */
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: white;
    text-align: center;

    background: url('../images/who_cycles_bckgrd.png') no-repeat center center fixed;
    background-size: contain; /* prevents cropping */
    background-color: #000;   /* fills empty space */
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Wrapper to centre content */
.center-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center; /* vertical centring */
    align-items: center;     /* horizontal centring */
    padding: 20px;
}

/* Header styling */
header h1 {
    font-size: 3rem;
    letter-spacing: 3px;
    margin: 0;
}

header h2 {
    font-size: 1.2rem;
    font-weight: 300;
    margin-top: 10px;
    opacity: 0.85;
}

/* Content box */
.content-box {
    max-width: 600px;
    padding: 25px;
    margin-top: 20px;
    background: rgba(0,0,0,0.45);
    border-radius: 10px;
    backdrop-filter: blur(4px);
}

.content-box h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

/* Footer stays at bottom */
footer {
    padding: 15px;
    font-size: 0.9rem;
    opacity: 0.75;
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    header h1 {
        font-size: 2.2rem;
    }
    .content-box {
        padding: 20px;
    }
}