/**
 * Pars Medicine Navigation CSS v2.0.0
 * Consistent navigation styling across all subdomains
 * Used by both pars-nav.js and pars-unified-nav.js
 */

:root {
    --pars-primary: #0066cc;
    --pars-secondary: #00a859;
    --pars-dark: #1a252f;
    --pars-light: #f8f9fa;
    --pars-white: #ffffff;
    --pars-text: #333333;
    --pars-text-muted: #6c757d;
    --pars-border: #e0e0e0;
    --pars-shadow: 0 4px 12px rgba(0,0,0,0.08);
    --pars-shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --pars-radius: 8px;
    --pars-transition: all 0.25s ease;
}

/* ========================================
   TOP BAR
   ======================================== */
.pars-topbar {
    background: var(--pars-dark);
    color: var(--pars-white);
    font-size: 13px;
    padding: 8px 0;
}
.pars-topbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.pars-topbar-links {
    display: flex;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.pars-topbar-links a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    transition: var(--pars-transition);
    display: flex;
    align-items: center;
    gap: 6px;
}
.pars-topbar-links a:hover {
    color: var(--pars-white);
}
.pars-topbar-cta {
    display: flex;
    gap: 12px;
}
.pars-topbar-cta a {
    padding: 6px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--pars-transition);
}
.pars-btn-emr {
    background: var(--pars-primary);
    color: var(--pars-white) !important;
}
.pars-btn-emr:hover {
    background: #0052a3;
}
.pars-btn-video {
    background: var(--pars-secondary);
    color: var(--pars-white) !important;
}
.pars-btn-video:hover {
    background: #008a49;
}

/* ========================================
   MAIN NAVIGATION CONTAINER
   ======================================== */
.pars-nav-container {
    background: var(--pars-white);
    box-shadow: var(--pars-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.pars-nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
}

/* ========================================
   BRAND
   ======================================== */
.pars-nav-brand {
    flex-shrink: 0;
}
.pars-nav-brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--pars-dark);
}
.pars-nav-logo {
    height: 45px;
    width: auto;
}
.pars-nav-brand-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--pars-primary);
}

/* ========================================
   DESKTOP MENU
   ======================================== */
.pars-nav-desktop {
    display: flex;
    align-items: center;
    gap: 8px;
}
.pars-nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 4px;
}
.pars-nav-item {
    position: relative;
}
.pars-nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    color: var(--pars-text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: var(--pars-radius);
    transition: var(--pars-transition);
    white-space: nowrap;
}
.pars-nav-link:hover,
.pars-nav-item.is-open > .pars-nav-link {
    background: var(--pars-light);
    color: var(--pars-primary);
}
.pars-nav-link[aria-current="page"],
.pars-nav-item.is-current > .pars-nav-link {
    color: var(--pars-primary);
    font-weight: 600;
}
.pars-nav-link svg {
    transition: transform 0.2s ease;
}
.pars-nav-item.is-open > .pars-nav-link svg {
    transform: rotate(180deg);
}

/* ========================================
   DROPDOWN
   ======================================== */
.pars-nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--pars-white);
    border-radius: var(--pars-radius);
    box-shadow: var(--pars-shadow-lg);
    min-width: 220px;
    padding: 8px 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--pars-transition);
    z-index: 100;
}
.pars-nav-item.is-open > .pars-nav-dropdown,
.pars-nav-item:focus-within > .pars-nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.pars-nav-dropdown .pars-nav-link {
    padding: 10px 20px;
    border-radius: 0;
    font-weight: 400;
}
.pars-nav-dropdown .pars-nav-link:hover {
    background: var(--pars-light);
}
.dropdown-parent-link {
    border-bottom: 1px solid var(--pars-border);
    margin-bottom: 4px;
    padding-bottom: 4px;
}

/* Nested dropdown */
.pars-nav-dropdown .pars-nav-item.has-children > .pars-nav-dropdown {
    left: 100%;
    top: 0;
}

/* ========================================
   MEGA MENU
   ======================================== */
.pars-nav-mega {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: var(--pars-white);
    border-radius: var(--pars-radius);
    box-shadow: var(--pars-shadow-lg);
    padding: 24px 32px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    min-width: 600px;
    max-width: 900px;
    opacity: 0;
    visibility: hidden;
    transition: var(--pars-transition);
    z-index: 100;
}
.pars-nav-item.has-mega.is-open > .pars-nav-mega {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.pars-nav-mega-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.pars-nav-mega-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.pars-nav-mega-heading {
    font-size: 14px;
    font-weight: 700;
    color: var(--pars-dark);
    margin: 0 0 4px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--pars-primary);
}
.pars-nav-mega-heading a {
    color: inherit;
    text-decoration: none;
}
.pars-nav-mega-heading a:hover {
    color: var(--pars-primary);
}
.pars-nav-mega-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.pars-nav-mega-link {
    display: block;
    padding: 6px 0;
    color: var(--pars-text);
    text-decoration: none;
    font-size: 14px;
    transition: var(--pars-transition);
}
.pars-nav-mega-link:hover,
.pars-nav-mega-link.is-current {
    color: var(--pars-primary);
    padding-left: 8px;
}

/* ========================================
   HAMBURGER / MOBILE
   ======================================== */
.pars-nav-hamburger {
    display: none;
    width: 44px;
    height: 44px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 10px;
    border-radius: var(--pars-radius);
    transition: var(--pars-transition);
}
.pars-nav-hamburger:hover {
    background: var(--pars-light);
}
.pars-nav-hamburger svg {
    width: 24px;
    height: 24px;
    color: var(--pars-dark);
}

/* Mobile Drawer */
.pars-nav-drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background: var(--pars-white);
    box-shadow: var(--pars-shadow-lg);
    z-index: 2000;
    transition: right 0.3s ease;
    overflow-y: auto;
}
.pars-nav-drawer.is-open {
    right: 0;
}
.pars-nav-drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--pars-border);
    background: var(--pars-light);
}
.pars-nav-drawer-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--pars-primary);
    text-decoration: none;
}
.pars-nav-drawer-close {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: var(--pars-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}
.pars-nav-drawer-close:hover {
    background: var(--pars-border);
}
.pars-nav-drawer-content {
    padding: 16px 0;
}
.pars-nav-mobile-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}
.pars-nav-mobile-menu .pars-nav-item {
    border-bottom: 1px solid var(--pars-border);
}
.pars-nav-mobile-menu .pars-nav-link {
    width: 100%;
    padding: 14px 20px;
    justify-content: space-between;
    border-radius: 0;
}
.pars-nav-mobile-menu .pars-nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: var(--pars-light);
    max-height: 0;
    overflow: hidden;
    padding: 0;
    transition: max-height 0.3s ease;
}
.pars-nav-mobile-menu .pars-nav-item.is-open > .pars-nav-dropdown {
    max-height: 1000px;
    padding: 8px 0;
}
.pars-nav-mobile-menu .pars-nav-dropdown .pars-nav-link {
    padding-left: 36px;
    font-size: 14px;
}

/* Overlay */
.pars-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: var(--pars-transition);
}
.pars-nav-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   LOADING / ERROR STATES
   ======================================== */
.pars-nav-loading,
.pars-nav-error {
    padding: 20px;
    text-align: center;
    color: var(--pars-text-muted);
}
.pars-nav-error {
    color: #dc3545;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1200px) {
    .pars-nav-mega {
        min-width: 500px;
    }
}
@media (max-width: 992px) {
    .pars-nav-desktop {
        display: none;
    }
    .pars-nav-hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .pars-topbar-links {
        display: none;
    }
    .pars-topbar-inner {
        justify-content: flex-end;
    }
}
@media (max-width: 576px) {
    .pars-nav-drawer {
        width: 100%;
        right: -100%;
    }
    .pars-topbar-cta a {
        padding: 5px 10px;
        font-size: 12px;
    }
}