/*=============================================
  Africa Ultrasound - Modern Navbar
=============================================*/

/*--- Top Header Bar ---*/
.top-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    padding: 10px 0;
}

.top-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.top-header .logo {
    flex-shrink: 0;
}

.top-header .logo img {
    height: 50px;
    width: auto;
}

.top-header .contact-info {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 2rem;
    flex-wrap: wrap;
}

.top-header .contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-body);
    white-space: nowrap;
}

.top-header .contact-item i {
    color: var(--primary);
    font-size: 0.9rem;
    width: 18px;
    text-align: center;
}

.top-header .social-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-header .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    transition: var(--transition);
}

.top-header .social-links a:hover {
    background: var(--primary);
    color: var(--text-light);
    transform: translateY(-2px);
}

/*--- Main Navigation ---*/
.main-nav {
    background: var(--navy);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.main-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

/*--- Nav Links ---*/
.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links li {
    position: relative;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 16px 16px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.08);
    border-bottom-color: var(--primary);
}

/*--- Dropdown ---*/
.nav-links li.dropdown {
    position: relative;
}

.nav-links li.dropdown .dropdown-toggle::after {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 0.65rem;
    margin-left: 6px;
    transition: var(--transition);
}

.nav-links li.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.nav-links .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--bg-white);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    margin: 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition);
    border-top: 2px solid var(--primary);
    z-index: 1001;
}

.nav-links li.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links .dropdown-menu li a {
    padding: 10px 20px;
    font-size: 0.88rem;
    color: var(--text-body);
    border-bottom: none;
    display: block;
}

.nav-links .dropdown-menu li a:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-bottom: none;
}

/*--- Secondary Nav (Events bar) ---*/
.secondary-nav {
    background: var(--primary);
}

.secondary-nav .nav-links a {
    padding: 10px 14px;
    font-size: 0.85rem;
    border-bottom: none;
}

.secondary-nav .nav-links a:hover {
    background: rgba(255, 255, 255, 0.15);
    border-bottom: none;
}

/*--- Hamburger Toggle ---*/
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1002;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    margin: 6px 0;
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/*--- Mobile Styles ---*/
@media (max-width: 992px) {
    .top-header .contact-info {
        gap: 1rem;
    }
    
    .top-header .contact-item {
        font-size: 0.8rem;
    }
    
    .nav-links a {
        padding: 14px 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .top-header-inner {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .top-header .logo img {
        height: 40px;
    }
    
    .top-header .contact-info {
        flex-direction: column;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .top-header .contact-item {
        font-size: 0.8rem;
    }
    
    .top-header .social-links {
        justify-content: center;
    }
    
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav-inner {
        padding: 0 15px;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 350px;
        height: 100vh;
        background: var(--navy);
        flex-direction: column;
        align-items: stretch;
        padding: 70px 0 2rem;
        overflow-y: auto;
        transition: var(--transition);
        box-shadow: -4px 0 20px rgba(0,0,0,0.3);
        z-index: 1001;
    }
    
    .nav-links.open {
        right: 0;
    }
    
    .nav-links a {
        padding: 14px 24px;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        border-bottom-color: transparent;
    }
    
    .nav-links a:hover {
        background: rgba(255, 255, 255, 0.08);
        border-bottom-color: transparent;
    }
    
    .nav-links .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-top: none;
        background: rgba(0,0,0,0.15);
        display: none;
        border-radius: 0;
    }
    
    .nav-links li.dropdown.open .dropdown-menu {
        display: block;
    }
    
    .nav-links .dropdown-menu li a {
        padding: 12px 24px 12px 40px;
        color: rgba(255,255,255,0.7);
    }
    
    .nav-links .dropdown-menu li a:hover {
        background: rgba(255,255,255,0.06);
        color: var(--text-light);
    }
    
    .nav-links li.dropdown .dropdown-toggle::after {
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .nav-links li.dropdown:hover .dropdown-toggle::after,
    .nav-links li.dropdown.open .dropdown-toggle::after {
        transform: translateY(-50%) rotate(180deg);
    }
    
    /* Secondary nav mobile */
    .secondary-nav .nav-links {
        position: static;
        width: 100%;
        max-width: 100%;
        height: auto;
        box-shadow: none;
        padding: 0;
        background: var(--primary);
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .secondary-nav .nav-links a {
        padding: 10px 14px;
        font-size: 0.8rem;
        border-bottom: none;
    }
    
    /* Mobile overlay */
    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 1000;
        backdrop-filter: blur(2px);
    }
    
    .nav-overlay.active {
        display: block;
    }
}

@media (max-width: 576px) {
    .top-header .social-links a {
        width: 28px;
        height: 28px;
        font-size: 0.7rem;
    }
    
    .nav-links a {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .secondary-nav .nav-links a {
        padding: 8px 10px;
        font-size: 0.75rem;
    }
}

/*--- Dropdown Item Hover (Legacy Bootstrap Override) ---*/
.dropdown-menu .dropdown-item:hover {
    background-color: var(--primary);
    color: white;
}