/* Top banner container */
.site-header {
    background-color: #27ADFF;
    height: 20vh;
    width: 100%;                 /* full width */
    position: fixed;             /* stays at top */
    top: 0;
    left: 0;
    z-index: 999;                /* stays above page content */

    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Logo auto-fits inside header */
.site-header img {
    height: 100%;
    width: auto;
    max-width: 100%;
    object-fit: contain;
}

/* Login button positioned center-right */
.login-btn {
    position: absolute;
    right: 2%;
    top: 50%;
    transform: translateY(-50%);
    background-color: white;
    color: #0270A8;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    border: 2px solid #ffffff;
    transition: 0.2s;
}

.login-btn:hover {
    background-color: #e6f5ff;
    border-color: #004f7a;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .site-header img {
        height: 90%;
    }

    .login-btn {
        right: 5%;
        padding: 8px 16px;
    }
}
body {
    padding-top: 20vh;   /* same height as header */
}