.sign-in-btn {
    background: #000;
    color: #fff;
    padding: 6px 20px;
    border-radius: 9999px;
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 800;
    display: inline-block;
}
@media (prefers-color-scheme: dark) {
    .sign-in-btn {
        background: rgba(255, 255, 255, 0.95);
        color: #000;
    }
}
#dynamic-header {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 10007;
    top: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.6s cubic-bezier(0.165, 0.84, 0.44, 1), top 0.4s ease;
}
#dynamic-header.floating {
    width: 95%;
    max-width: 1100px;
    height: 56px;
    border-radius: 16px;
    border: 1px solid var(--glass-border) !important;
    box-shadow: 0 10px 40px var(--shadow-color);
}
/* Header action buttons are hidden until the landsat is in the corner */
#dynamic-header nav {
    display: none;
}
#dynamic-header nav.show {
    display: flex;
}