/* -------------------------
   Header Container
------------------------- */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background-color: #ffffff;
    /* clean white */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* -------------------------
   Logo
------------------------- */
header .logo img {
    height: 50px;
    width: auto;
    display: block;
}

/* -------------------------
   Navigation (Desktop)
------------------------- */
.main-nav .nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.main-nav .nav-links li a {
    font-weight: 500;
    font-size: 16px;
    color: var(--color-neutral-dark);
    text-decoration: none;
    transition: color 0.2s ease;
}

.main-nav .nav-links li a:hover,
.main-nav .nav-links li a:focus {
    color: var(--color-primary);
    outline: none;
}

/* -------------------------
   Hamburger (Mobile)
------------------------- */
#nav-toggle {
    display: none;
    /* hidden checkbox */
}

.hamburger {
    display: none;
    /* hidden on desktop */
    flex-direction: column;
    justify-content: space-between;
    width: 25px;
    height: 20px;
    cursor: pointer;
    padding: 0;
}

.hamburger span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-neutral-dark);
    border-radius: 2px;
    transition: 0.3s;
}

/* --------- Responsive --------- */
@media (max-width: 1024px) {

    .hamburger {
        display: flex;
        cursor: pointer;
    }

    .main-nav .nav-links {
        display: none;
        /* hidden by default */
        position: absolute;
        top: 100%;
        /* below header */
        right: 0;
        width: 100%;
        background-color: #ffffff;
        flex-direction: column;
        padding: var(--space-md) var(--space-lg);
        gap: var(--space-md);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    /* Use general sibling combinator ~ instead of + */
    #nav-toggle:checked~.main-nav .nav-links {
        display: flex;
    }
}