/* ================================
   HEADER & NAVIGATION
   Mobil-first, sticky header
   ================================ */

/* ===== MAIN HEADER ===== */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-sticky);
    transition: var(--transition-normal);
}

    .site-header.scrolled {
        box-shadow: var(--shadow-md);
    }

/* ===== HEADER CONTAINER ===== */
.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height-mobile);
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .header-container {
        height: var(--header-height);
        padding: 0 var(--spacing-lg);
    }
}

/* ===== LOGO ===== */
.site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    z-index: var(--z-sticky);
}

    .site-logo img {
        height: 40px;
        width: auto;
    }

@media (min-width: 768px) {
    .site-logo img {
        height: 50px;
    }
}

.site-logo-text {
    margin-left: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--primary-green);
}

/* ===== NAVIGATION ===== */
.main-nav {
    display: none;
}

@media (min-width: 768px) {
    .main-nav {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    position: relative;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-fast);
}

    .nav-link:hover {
        color: var(--primary-green);
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--primary-green);
        transition: var(--transition-normal);
    }

    .nav-link:hover::after,
    .nav-link.active::after {
        width: 100%;
    }

/* ===== HEADER ACTIONS ===== */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-search-toggle,
.header-cart {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

    .header-search-toggle:hover,
    .header-cart:hover {
        background: var(--bg-light);
        color: var(--primary-green);
    }

.header-cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-pink);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 0 6px;
}

/* ===== HAMBURGER MENU BUTTON ===== */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: var(--z-sticky);
}

@media (min-width: 768px) {
    .hamburger {
        display: none;
    }
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

    .hamburger-line:not(:last-child) {
        margin-bottom: 5px;
    }

/* Hamburger animation when open */
.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-white);
    z-index: var(--z-fixed);
    transform: translateX(-100%);
    transition: var(--transition-normal);
    overflow-y: auto;
    padding-top: var(--header-height-mobile);
    box-shadow: var(--shadow-xl);
}

    .mobile-menu.active {
        transform: translateX(0);
    }

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

    .mobile-menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }

.mobile-nav-list {
    list-style: none;
    padding: var(--spacing-lg);
}

.mobile-nav-item {
    border-bottom: 1px solid var(--border-light);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

    .mobile-nav-link:hover {
        color: var(--primary-green);
        padding-left: var(--spacing-sm);
    }

.mobile-nav-icon {
    font-size: var(--font-size-xl);
    color: var(--primary-green);
}

/* ===== SEARCH BAR (Expandable) ===== */
.header-search {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

    .header-search.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

.search-form {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 14px 50px 14px 20px;
    font-size: var(--font-size-base);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
}

    .search-input:focus {
        outline: none;
        border-color: var(--primary-green);
    }

.search-submit {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-green);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

    .search-submit:hover {
        background: var(--primary-green-dark);
    }