/* ========================================
   Modern Navigation - Sticky Header, Hamburger Menu, User Dropdown
   ======================================== */

/* Enhanced Header */
header {
    background: var(--color-bg-card);
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.header_auth_menu {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-left: auto;
}

.header_auth_menu li {
    list-style: none;
}

.header_auth_menu a {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.header_auth_menu a:hover {
    color: var(--color-primary);
    background: rgba(68, 176, 236, 0.1);
}

/* User Dropdown Menu */
.user_dropdown {
    position: relative;
}

.user_dropdown_toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-primary);
    font-weight: 500;
}

.user_dropdown_toggle:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-primary);
}

.user_dropdown_toggle i {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.user_dropdown_avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    overflow: hidden;
    flex-shrink: 0;
}

.user_dropdown_avatar img {
    width: 32px;
    height: 32px;
    object-fit: cover;
    display: block;
}

.user_dropdown_name {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user_dropdown_arrow {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.user_dropdown.is-open .user_dropdown_arrow {
    transform: rotate(180deg);
}

.user_dropdown_menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 220px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    overflow: hidden;
    z-index: 1;
}

.user_dropdown.is-open .user_dropdown_menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user_dropdown_menu_header {
    padding: 1rem;
    border-bottom: 1px solid var(--color-divider);
    background: var(--color-bg-tertiary);
}

.user_dropdown_menu_name {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.user_dropdown_menu_role {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.user_dropdown_menu_item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.user_dropdown_menu_item:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.user_dropdown_menu_item i {
    font-size: 1.125rem;
    width: 1.5rem;
}

.user_dropdown_menu_divider {
    height: 1px;
    background: var(--color-divider);
    margin: 0.5rem 0;
}

.user_dropdown_menu_item.logout {
    color: var(--color-error);
}

.user_dropdown_menu_item.logout:hover {
    background: rgba(157, 0, 0, 0.05);
    border-left-color: var(--color-error);
}

/* Mobile Hamburger Menu */
.mobile_menu_toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile_menu_toggle_line {
    width: 24px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.mobile_menu_toggle.is-active .mobile_menu_toggle_line:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

.mobile_menu_toggle.is-active .mobile_menu_toggle_line:nth-child(2) {
    opacity: 0;
}

.mobile_menu_toggle.is-active .mobile_menu_toggle_line:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

/* Mobile Menu Overlay */
.mobile_menu_overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.mobile_menu_overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.mobile_menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100%;
    background: var(--color-bg-card);
    box-shadow: var(--shadow-2xl);
    transition: right var(--transition-base);
    z-index: 1000;
    overflow-y: auto;
}

.mobile_menu.is-active {
    right: 0;
}

.mobile_menu_header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-divider);
    background: var(--color-bg-tertiary);
}

.mobile_menu_title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.mobile_menu_close {
    padding: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    transition: color var(--transition-fast);
}

.mobile_menu_close:hover {
    color: var(--color-error);
}

.mobile_menu_user_info {
    padding: 1.5rem;
    background: linear-gradient(135deg, #44b0ec 0%, #2a7fba 100%);
    color: white;
}

.mobile_menu_user_avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    overflow: hidden;
}

.mobile_menu_user_avatar img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    display: block;
}

.mobile_menu_user_name {
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.mobile_menu_user_role {
    font-size: 0.875rem;
    opacity: 0.9;
}

.mobile_menu_nav {
    padding: 1rem 0;
}

.mobile_menu_nav_item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 1rem 1.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.mobile_menu_nav_item:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.mobile_menu_nav_item i {
    font-size: 1.25rem;
    width: 1.5rem;
}

.mobile_menu_nav_divider {
    height: 1px;
    background: var(--color-divider);
    margin: 0.5rem 1.5rem;
}

.mobile_menu_nav_item.logout {
    color: var(--color-error);
}

.mobile_menu_nav_item.logout:hover {
    background: rgba(157, 0, 0, 0.05);
    border-left-color: var(--color-error);
}

/* Responsive */
@media screen and (max-width: 900px) {
    /* Show hamburger menu */
    .mobile_menu_toggle {
        display: flex;
    }

    /* Hide regular auth menu on mobile */
    .header_auth_menu {
        display: none;
    }

    /* Adjust header */
    header {
        padding: var(--space-md);
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .user_dropdown_toggle {
        padding: var(--space-sm);
    }

    .user_dropdown_menu {
        right: 0;
        min-width: 200px;
    }
}

@media screen and (max-width: 700px) {
    header {
        padding: var(--space-sm) var(--space-md);
        margin-bottom: var(--space-sm);
    }

    .mobile_menu {
        width: 100%;
        right: -100%;
    }

    .mobile_menu.is-active {
        right: 0;
    }

    .mobile_menu_header {
        padding: var(--space-lg);
    }

    .mobile_menu_close {
        width: 36px;
        height: 36px;
    }

    .mobile_menu_nav {
        padding: var(--space-md) 0;
    }

    .mobile_menu_nav_item {
        padding: 0.875rem 1.25rem;
        font-size: 0.9375rem;
    }

    .user_dropdown_avatar {
        width: 28px;
        height: 28px;
    }

    .user_dropdown_avatar img {
        width: 28px;
        height: 28px;
    }

    .user_dropdown_name {
        font-size: 0.875rem;
    }

    .user_dropdown_menu {
        min-width: 180px;
        right: var(--space-xs);
    }

    .user_dropdown_menu_item {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
}

/* Animation for dropdown items */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}