/* Main Header Structure */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Logo */
.logo a {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text-base);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 5px 0;
}

.logo i {
    font-size: 24px;
    margin-right: 10px;
    color: var(--color-primary);
}

/* Desktop Navigation */
.header-links {
    display: none;
    align-items: center;
    margin-left: 10px;
    gap: 5px;
}

.header-links a,
.header-link-button {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease, background-color 0.2s ease;
    position: relative;
    padding: 10px 15px;
    font-size: 13px;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.header-links a:hover,
.header-link-button:hover {
    color: var(--color-primary);
    background-color: var(--color-background);
}

.header-links a.active {
    color: var(--color-primary);
    font-weight: 600;
    background-color: var(--color-background);
}

.header-link-button.share-button {
    background-color: rgba(0, 169, 127, 0.1);
    color: var(--color-primary);
    font-weight: 600;
}

.header-link-button.share-button:hover {
    background-color: var(--color-primary);
    color: white;
}

.header-link-button.share-button i {
    transition: transform 0.3s ease;
}

.header-link-button.share-button:hover i {
    transform: rotate(90deg);
}

/* Main Navigation Icons & Buttons */
.main-nav {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-button,
.nav-icon-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-muted);
    background-color: var(--color-surface);
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
}

.nav-icon-button i,
.nav-button i {
    font-size: 18px;
}

.nav-button:hover,
.nav-icon-button:hover,
.nav-icon-button.active {
    color: var(--color-primary);
    background-color: rgba(0, 169, 127, 0.1);
    border-color: rgba(0, 169, 127, 0.2);
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* User Dropdowns (Notifications & Profile) */
.notification-container,
.profile-container {
    position: relative;
}

.notification-bell,
.profile-menu-button {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: #e74c3c;
    color: white;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    border: 2px solid white;
}

.notification-dropdown,
.profile-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 350px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    z-index: 1010;
}

.notification-dropdown.show,
.profile-dropdown.show {
    display: block;
}

.notification-header,
.profile-header {
    padding: 12px 15px;
    border-bottom: 1px solid var(--color-border);
}

.notification-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.notification-list {
    max-height: 400px;
    overflow-y: auto;
}

.notification-item {
    display: block;
    padding: 12px 15px;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text-base);
    transition: background-color 0.2s ease;
}

.notification-item:last-child {
    border-bottom: none;
}

.notification-item:hover {
    background-color: var(--color-background);
}

.notification-item.unread {
    background-color: #f8f9fa;
    font-weight: 500;
}

.notification-item p {
    margin: 0 0 5px 0;
    font-size: 14px;
    line-height: 1.5;
}

.notification-item small {
    font-size: 12px;
    color: var(--color-text-muted);
}

.notification-item.empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: 30px 15px;
}

.profile-dropdown {
    width: 220px;
}

.profile-header {
    display: flex;
    flex-direction: column;
    line-height: 1.4;
}

.profile-header strong {
    font-size: 15px;
}

.profile-header small {
    font-size: 13px;
    color: var(--color-text-muted);
}

.profile-links a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    font-size: 15px;
    text-decoration: none;
    color: var(--color-text-base);
}

.profile-links a:hover {
    background-color: var(--color-background);
    color: var(--color-primary);
}

.profile-links a .fa-fw {
    width: 20px;
    color: var(--color-text-muted);
}

.profile-links a.logout-link {
    border-top: 1px solid var(--color-border);
    color: #e74c3c;
}

.profile-links a.logout-link:hover {
    background-color: #fff5f5;
}

/* Mobile Menu (Off-Canvas) */
.menu-toggle {
    font-size: 20px;
    display: block;
}

.offcanvas-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.offcanvas-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background-color: var(--color-surface);
    z-index: 1999;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.offcanvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--color-border);
}

.close-offcanvas {
    background: none;
    border: none;
    font-size: 30px;
    color: var(--color-text-muted);
    cursor: pointer;
    line-height: 1;
}

.offcanvas-nav {
    display: flex;
    flex-direction: column;
    padding: 20px;
    gap: 10px;
}

.offcanvas-nav a,
.offcanvas-link-button {
    color: var(--color-text-base);
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    padding: 12px 15px;
    border-radius: 8px;
    transition: background-color 0.2s ease, color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
    width: 100%;
}

.offcanvas-nav a:hover,
.offcanvas-link-button:hover {
    background-color: var(--color-background);
    color: var(--color-primary);
}

/* Modal Styles (Search & Share) */
.search-modal-overlay,
.share-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: none;
    justify-content: center;
    align-items: flex-start;
    padding: 15px;
    padding-top: 10vh;
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.search-modal-overlay.visible,
.share-modal-overlay.visible {
    display: flex;
    opacity: 1;
}

.search-modal-content,
.share-modal-content {
    background: var(--color-surface);
    border-radius: 12px;
    width: 100%;
    max-width: 550px;
    position: relative;
    transform: scale(0.95) translateY(-20px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.search-modal-overlay.visible .search-modal-content,
.share-modal-overlay.visible .share-modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.close-search-modal,
.close-share-modal {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #f1f3f5;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    color: #868e96;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}

.close-search-modal:hover,
.close-share-modal:hover {
    background-color: #e9ecef;
    color: #343a40;
}

/* Search Modal Specifics */
.search-modal-form {
    display: flex;
    align-items: center;
    padding: 12px;
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.search-modal-icon {
    color: #adb5bd;
    font-size: 18px;
    position: absolute;
    left: 27px;
    top: 50%;
    transform: translateY(-50%);
}

.search-modal-input {
    flex-grow: 1;
    border: none;
    outline: none;
    font-size: 16px;
    padding: 15px 15px 15px 50px;
}

.search-modal-button {
    display: none;
}

.autocomplete-results {
    max-height: 60vh;
    overflow-y: auto;
    display: none;
}

.autocomplete-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 20px;
    text-decoration: none;
    color: var(--color-text-base);
    transition: background-color 0.2s ease;
    width: 100%;
}

.autocomplete-item:hover {
    background-color: var(--color-background);
}

.autocomplete-item img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}

.autocomplete-item-details {
    display: flex;
    flex-direction: column;
}

.autocomplete-item-name {
    font-size: 16px;
    font-weight: 600;
}

.autocomplete-item-brand {
    font-size: 14px;
    color: var(--color-text-muted);
}

.autocomplete-results .no-results {
    padding: 20px;
    text-align: center;
    color: var(--color-text-muted);
}

/* Share Modal Specifics */
.share-modal-content {
    padding: 35px 45px;
    text-align: center;
}

.share-modal-content h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 26px;
    font-weight: 700;
    color: #212529;
}

.share-modal-content p {
    margin-bottom: 30px;
    color: #6c757d;
    font-size: 16px;
}

.share-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.share-option-button {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 25px;
    border: 1px solid #dee2e6;
    border-radius: 10px;
    text-decoration: none;
    text-align: left;
    color: #495057;
    font-size: 17px;
    font-weight: 600;
    transition: all 0.2s ease;
    transform: translateY(0);
}

.share-option-button:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.share-option-button i {
    font-size: 24px;
    width: 30px;
    text-align: center;
    color: var(--color-primary);
    transition: color 0.2s ease;
}

/* Responsive Styles */
@media (min-width: 992px) {
    .header-links {
        display: flex;
    }
    .menu-toggle {
        display: none;
    }
}