/* Primary header styling */
header {
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--background-200);
    padding: var(--spacing-sm) 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}

/* Main header layout container */
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    transition: gap var(--transition-speed) var(--transition-timing);
}

/* Logo and branding */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-primary);
    flex-shrink: 0;
}

.logo img {
    height: 35px;
}

.logo-text {
    font-size: var(--text-lg);
    font-weight: bold;
    display: none;
}

@media (min-width: 480px) {
    .logo-text {
        display: inline;
    }

    .logo img {
        height: 40px;
    }
}

/* Desktop navigation elements */
.desktop-nav {
    margin-left: auto;
    transition: transform var(--transition-speed) var(--transition-timing);
    transform: translateX(0);
}

.desktop-nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

.desktop-nav a {
    font-size: var(--text-sm);
    padding: var(--spacing-xs) 0;
    transition: all var(--transition-speed) var(--transition-timing);
}

.desktop-nav a:hover,
.desktop-nav a:focus {
    color: var(--color-accent-default);
}

.desktop-nav .active a {
    background-color: var(--background-300);
    color: var(--text-800);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-weight: 500;
}

.desktop-nav .active a:hover,
.desktop-nav .active a:focus {
    background-color: var(--background-400);
    color: var(--text-900);
}

/* Header action buttons (search, cart, profile) */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.header-actions a .material-symbols-outlined,
.header-actions button .material-symbols-outlined {
    font-size: 26px;
    color: var(--secondary-800);
}

.header-actions a .material-symbols-outlined:hover,
.header-actions button .material-symbols-outlined:hover {
    color: var(--secondary-900);
    transform: scale(1.1);
    transition: color var(--transition-speed) var(--transition-timing);
}

/* Desktop search functionality */
.search-container {
    position: relative;
    display: flex;
    align-items: center;
    flex: 0 0 auto;
}

.search-container .search-input {
    width: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--background-300);
    border-radius: var(--border-radius-md);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    opacity: 0;
    position: absolute;
    right: 26px;
    margin-right: var(--spacing-sm);
    transition: width var(--transition-speed) var(--transition-timing),
        opacity var(--transition-speed) var(--transition-timing);
    display: none;
}

.search-container .search-close-btn {
    display: none !important;
    margin-left: var(--spacing-sm);
}

.search-container.expanded {
    z-index: 1002;
    position: relative;
}

.search-container.expanded .search-input {
    width: 200px;
    opacity: 1;
    display: block;
    z-index: 3;
}

.header-container:has(.search-container.expanded) .desktop-nav {
    transform: translateX(-200px);
}

/* Search results dropdown styling */
.search-container .autocomplete-results,
.mobile-search-container .autocomplete-results {
    display: none;
    background-color: var(--background-100);
    border: 1px solid var(--background-300);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1001;
    padding: var(--spacing-xs) 0;
}

.search-container.expanded .autocomplete-results {
    max-width: 400px;
}

.mobile-search-container .autocomplete-results {
    max-height: 250px;
}

.autocomplete-results .result-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--background-200);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    transition: background-color var(--transition-speed) var(--transition-timing);
}

.autocomplete-results .result-item.book-result {
    color: var(--color-accent-default);
}

.autocomplete-results .result-item.author-result {
    color: var(--secondary-500);
}

.autocomplete-results .result-item:last-child {
    border-bottom: none;
}

.autocomplete-results .result-item:hover,
.autocomplete-results .result-item:focus {
    background-color: var(--background-200);
}

/* Header-specific search results */
#headerAutocompleteResults {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg-secondary);
    border: 1px solid var(--text-200);
    border-top: none;
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
    margin-top: 0;
    box-shadow: var(--shadow-md);
    z-index: 1001;
    display: none;
    max-height: 200px;
    overflow-y: auto;
    box-sizing: border-box;
}

#headerAutocompleteResults.active {
    display: block;
}

#headerAutocompleteResults .result-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--text-200);
    background-color: var(--color-bg-secondary);
    transition: background-color var(--transition-speed) var(--transition-timing);
    border-left: none;
    border-right: none;
    border-radius: 0;
    box-shadow: none;
    display: block;
    transform: none;
}

#headerAutocompleteResults .result-item:last-child {
    border-bottom: none;
}

#headerAutocompleteResults .result-item:hover {
    background-color: var(--background-300);
    transform: none;
    box-shadow: none;
}

#headerAutocompleteResults .result-item .text {
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    line-height: 1.4;
    font-weight: normal;
    margin: 0;
    display: block;
}

/* Mobile search interface */
.mobile-search-container {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--background-300);
    z-index: 1002;
}

.mobile-search-container.active {
    display: block;
}

.mobile-search-container .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mobile-search-container .search-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--background-300);
    border-radius: var(--border-radius-md);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--text-md);
}

.search-input:focus,
.search-close-btn:focus {
    outline: none;
    border-color: var(--color-accent-default);
}

.search-input:focus-visible,
.search-close-btn:focus-visible {
    outline: 3px solid var(--accent-800);
    outline-offset: 2px;
}

/* Mobile responsive adjustments */
@media (max-width: 767px) {

    .search-container .search-input,
    .search-container .search-close-btn {
        display: none !important;
    }

    .mobile-search-container {
        top: 60px;
    }
}

/* Mobile menu controls */
.mobile-nav-toggle .material-symbols-outlined {
    display: none;
    z-index: 1001;
    height: 28px;
    width: 28px;
}

/* Mobile Navigation Menu*/
.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    background-color: var(--color-bg-secondary);
    z-index: 1000;
    border-bottom: 1px solid var(--background-300);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
}

.mobile-nav li {
    border-bottom: 1px solid var(--background-300);
}

.mobile-nav li:last-child {
    border-bottom: none;
}

.mobile-nav a,
.mobile-nav button {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--text-md);
    text-align: left;
    width: 100%;
}

.mobile-nav a:hover,
.mobile-nav a:focus,
.mobile-nav button:hover,
.mobile-nav button:focus {
    background-color: var(--background-300);
    color: var(--color-text-primary);
}

.mobile-nav button {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* SlickNav mobile menu customisation */
.slicknav_menu {
    display: none;
    background: transparent;
    padding: 0;
}

.slicknav_btn {
    background-color: transparent;
    float: none;
    display: flex;
    align-items: center;
    margin: 0;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-md);
}

.slicknav_btn:hover,
.slicknav_btn:focus {
    background-color: var(--background-300);
}

.slicknav_menu .slicknav_icon-bar {
    background-color: var(--color-text-primary);
    height: 2px;
    box-shadow: none;
}

.slicknav_nav {
    clear: both;
    color: var(--color-text-primary);
    margin: 0;
    padding: 0;
    font-size: var(--text-md);
    background: var(--color-bg-secondary);
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--background-300);
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    z-index: 1000;
}

.slicknav_nav ul {
    list-style: none;
    overflow: hidden;
    padding: 0;
    margin: 0 0 0 var(--spacing-md);
}

.slicknav_nav li {
    display: block;
    border-bottom: 1px solid var(--background-300);
}

.slicknav_nav li:last-child {
    border-bottom: none;
}

.slicknav_nav a {
    padding: var(--spacing-md) var(--spacing-lg);
    margin: 0;
    text-decoration: none;
    color: var(--color-text-secondary);
    display: block;
    font-family: var(--font-body);
}

.slicknav_nav a:hover,
.slicknav_nav a:focus {
    background: var(--background-300);
    color: var(--color-text-primary);
    border-radius: 0;
}

.slicknav_nav .slicknav_arrow {
    font-size: 0.8em;
    margin: 0 0 0 0.4em;
    color: var(--color-text-secondary);
}

.slicknav_nav .slicknav_row:hover .slicknav_arrow,
.slicknav_nav .slicknav_item:hover .slicknav_arrow {
    color: var(--color-text-primary);
}

/* Mobile responsive adjustments */
@media (max-width: 767px) {

    .desktop-nav,
    .mobile-nav,
    .mobile-nav-toggle {
        display: none;
    }

    .header-actions {
        display: flex;
        gap: var(--spacing-sm);
        order: 2;
    }

    .header-container {
        justify-content: space-between;
        gap: var(--spacing-sm);
    }

    .logo {
        order: 1;
        margin-right: auto;
    }

    .main-title {
        text-align: center;
    }

    .slicknav_menu {
        background: none !important;
        display: block;
        order: 3;
        position: static;
    }
}

/* Mobile profile interface */
.profile-section-mobile {
    border-top: 1px solid var(--background-300);
    padding: var(--spacing-md) var(--spacing-lg);
}

.profile-section-mobile .profile-info {
    text-align: center;
}

.profile-section-mobile .user-name {
    color: var(--color-text-primary);
    font-size: var(--text-md);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-body);
    font-weight: 500;
}

.profile-section-mobile .user-email {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-body);
}

.profile-section-mobile .btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-md);
    font-family: var(--font-button);
    font-size: var(--text-sm);
    cursor: pointer;
    text-align: center;
    display: block;
    text-decoration: none;
    transition: background-color var(--transition-speed) var(--transition-timing);
}

.profile-section-mobile .logout-btn {
    background-color: var(--background-300);
    color: var(--color-text-primary);
}

.profile-section-mobile .login-signup-btn {
    background-color: var(--color-accent-default);
    color: white;
}

/* Shopping cart notification */
.cart-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.cart-item-count {
    position: absolute;
    top: -8px;
    right: -10px;
    background-color: var(--color-danger, red);
    color: white;
    border-radius: 50%;
    padding: 1px 5px;
    font-size: 0.7rem;
    font-weight: bold;
    line-height: 1;
    min-width: 16px;
    text-align: center;
    display: none;
    z-index: 1;
}

.cart-icon.has-items .cart-item-count {
    display: inline-block;
}