/* Frontend Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3rem;
    padding-inline: clamp(1.5rem, 4vw + 1rem, 3rem);
    user-select: none;
    width: 100%;
    z-index: 4000;
}

header a {
    text-decoration: none;
    color: var(--text, #eee);
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Roboto', sans-serif;
    transition: all 0.2s ease-in;
}

header a:hover {
    color: var(--accent, #fff);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

header button {
    background-color: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    appearance: none;
    font-size: 2rem;
    font-weight: 700;
    z-index: 9999;
}

header button:hover {
    color: var(--accent, #fff);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Legacy: main > .header (for backward compatibility) */
main > .header {
    position: fixed;
    width: 100%;
    z-index: 4000;
}

main > .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3rem;
    padding-inline: clamp(1.5rem, 4vw + 1rem, 3rem);
    user-select: none;
}

main > .header a {
    text-decoration: none;
    color: #eee;
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Roboto', sans-serif;
    transition: all 0.2s ease-in;
}

main > .header a:hover {
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

main > .header button {
    background-color: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    appearance: none;
    font-size: 2rem;
    font-weight: 700;
    z-index: 9999;
}

main > .header button:hover {
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}