/* Professional Navigation CSS for Biomédica de Referencia */

/* Top Bar Styles */
.top-bar {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    background: #aa1920;
    color: #ffffff;
    padding: 8px 0;
    font-size: 12px;
    transform: translateZ(0);
    will-change: transform;
}

.top-bar-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    margin: 0 10px;
    font-size: 11px;
    font-weight: 400;
    transition: color 0.3s ease;
}

.top-links a:hover {
    color: #ffffff;
}

.top-social {
    display: flex;
    gap: 8px;
}

.top-social a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

.top-social a:hover {
    color: #aa1920;
    background: #ffffff;
}

/* Main Navigation */
.main-nav {
    position: fixed !important;
    top: 36px;
    left: 0;
    right: 0;
    z-index: 1000;
    height: auto !important;
    background: #ffffff;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    transition: none;
    transform: translateZ(0);
    will-change: transform;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 85px;
}

.nav-logo img {
    height: 55px;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: 5px;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    padding: 12px 18px;
    border-radius: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-menu a:hover {
    color: #aa1920;
    background: rgba(170, 25, 32, 0.08);
}

.nav-menu a.active {
    color: #aa1920;
    background: rgba(170, 25, 32, 0.12);
}

.nav-phone {
    color: #ffffff;
    background: #aa1920;
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 25px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(170, 25, 32, 0.3);
    white-space: nowrap;
}

.nav-phone:hover {
    background: #8b1419;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(170, 25, 32, 0.4);
}

.nav-phone i {
    margin-right: 8px;
}

.mobile-menu-btn {
    display: none;
    background: #aa1920;
    border: none;
    color: #ffffff;
    padding: 12px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 18px;
}

.mobile-menu-btn:hover {
    background: #8b1419;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 121px;
    left: 0;
    right: 0;
    background: #ffffff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.mobile-menu.active {
    max-height: 600px;
    display: block;
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu li {
    border-bottom: 1px solid #f0f0f0;
}

.mobile-menu a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    padding: 18px 25px;
    display: block;
    transition: all 0.3s ease;
}

.mobile-menu a:hover {
    background: rgba(170, 25, 32, 0.08);
    color: #aa1920;
    padding-left: 35px;
}

.mobile-contact {
    padding: 25px;
    text-align: center;
    background: #f8f9fa;
    border-top: 2px solid #ecf0f1;
}

.mobile-contact .nav-phone {
    display: inline-block;
    margin-top: 15px;
    font-size: 16px;
    padding: 15px 30px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .nav-menu a {
        padding: 12px 14px;
        font-size: 13px;
    }
    
    .nav-phone {
        padding: 10px 20px;
        font-size: 13px;
    }
}

@media (max-width: 992px) {
    .top-bar {
        display: none;
    }
    
    .main-nav {
        top: 0;
    }
    
    .nav-menu,
    .nav-phone {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-container {
        height: 70px;
    }
    
    .nav-logo img {
        height: 45px;
    }
    
    .mobile-menu {
        top: 70px;
    }
}

.mobile-only {
    display: block;
}

.desktop-only {
    display: none;
}

@media screen and (min-width: 768px) {
    .desktop-only {
        display: block;
    }
    .mobile-only {
        display: none;
    }
}

/* Main content margin adjustment */
.main-content-home {
    margin-top: 121px; /* top-bar (36px) + main-nav (85px) */
}

@media (max-width: 992px) {
    .main-content-home {
        margin-top: 70px;
    }
}