header {
    padding: 12px 24px;
    border-bottom: 1px solid #222;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

header h1 {
    font-size: 0.9375rem; 
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #aaa;
    text-transform: uppercase;
}