/* ============================================
   JUPITER PLANET XXL — Design 10
   header.css — Ultra-minimal navbar
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--color-white);
    border-bottom: var(--border);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Brand */
.brand {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-black);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.brand:hover {
    color: var(--color-black);
}

/* Navigation */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-menu a {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.8125rem;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    padding: 4px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-black);
    transition: width var(--transition);
}

.nav-menu a:hover {
    color: var(--color-black);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 32px;
    height: 32px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    gap: 6px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 1px;
    background-color: var(--color-black);
    transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        height: calc(100vh - 72px);
        background-color: var(--color-white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        padding: var(--space-lg) var(--space-md);
        gap: var(--space-md);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        border-top: var(--border);
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    .nav-menu a {
        font-size: 1.25rem;
        font-weight: 500;
        letter-spacing: 0.05em;
    }
}