/**
 * iLearnZed Navigation Bar - Core Layout
 * Ensures clean alignment, visual balance, consistent behavior on all screen sizes.
 */

/* ========== CSS VARIABLES ========== */
.ilearnzed-navbar {
    --nav-height: 72px;
    --nav-padding-x: 1.5rem;
    --nav-link-padding-y: 0.5rem;
    --nav-link-padding-x: 1rem;
    --nav-font-size: 0.9375rem;
    --nav-line-height: 1.5;
    --nav-logo-height: 50px;
    --nav-btn-height: 40px;
    --nav-btn-padding-x: 1.25rem;
    --nav-transition: 0.2s ease;
}

/* ========== NAVBAR & CONTAINER ========== */
.ilearnzed-navbar {
    min-height: var(--nav-height);
    padding: 0;
    display: flex;
    align-items: center;
    background: var(--navbar-bg, #fff);
    border-bottom: 1px solid var(--navbar-border, #e2e8f0);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    transition: box-shadow var(--nav-transition);
}

.ilearnzed-navbar.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Restore sensible container padding (overrides base zero-padding) */
.ilearnzed-navbar .container {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: nowrap !important;
    width: 100% !important;
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding-left: var(--nav-padding-x) !important;
    padding-right: var(--nav-padding-x) !important;
    min-height: var(--nav-height);
}

/* ========== LOGO (LEFT) ========== */
.ilearnzed-navbar .navbar-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin: 0;
    padding: 0;
    text-decoration: none;
    transition: opacity var(--nav-transition);
}

.ilearnzed-navbar .navbar-brand:hover {
    opacity: 0.9;
}

.ilearnzed-navbar .navbar-brand img {
    height: var(--nav-logo-height);
    width: auto;
    object-fit: contain;
    display: block;
}

/* ========== DESKTOP NAV WRAPPER ========== */
.ilearnzed-navbar .desktop-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    gap: 1.5rem;
    margin-left: 2rem;
    min-width: 0;
}

/* ========== NAV LINKS (CENTER) ========== */
.ilearnzed-navbar .desktop-nav .navbar-nav.me-auto,
.ilearnzed-navbar .desktop-nav .institutional-primary-nav {
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
    min-width: 0;
}

.ilearnzed-navbar .desktop-nav .nav-item {
    margin: 0;
}

.ilearnzed-navbar .desktop-nav .nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: var(--nav-font-size);
    font-weight: 500;
    line-height: 1.2;
    color: var(--navbar-text, #374151);
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--nav-transition);
    white-space: nowrap;
    min-height: var(--nav-btn-height);
    box-sizing: border-box;
}

.ilearnzed-navbar .desktop-nav .nav-link:hover,
.ilearnzed-navbar .desktop-nav .nav-link:focus-visible {
    color: var(--zambia-green, #00A651);
    background: rgba(0, 166, 81, 0.08);
    outline: none;
}

.ilearnzed-navbar .desktop-nav .nav-link:focus-visible {
    box-shadow: 0 0 0 2px rgba(0, 166, 81, 0.3);
}

.ilearnzed-navbar .desktop-nav .nav-link.active {
    color: var(--zambia-green, #00A651);
    background: rgba(0, 166, 81, 0.12);
    font-weight: 600;
}

.ilearnzed-navbar .desktop-nav .nav-link i {
    font-size: 1.125rem;
    width: 1.25rem;
    min-width: 1.25rem;
    text-align: center;
    line-height: 1;
    opacity: 0.95;
    flex-shrink: 0;
    margin: 0 !important;
    vertical-align: middle;
}

.ilearnzed-navbar .desktop-nav .nav-link .nav-link-label,
.ilearnzed-navbar .desktop-nav .nav-link span:not(.badge):not(.badge-notify) {
    line-height: 1.2;
}

/* ========== ACTION BUTTONS (RIGHT) ========== */
.ilearnzed-navbar .desktop-nav .navbar-nav:last-child,
.ilearnzed-navbar .desktop-nav .institutional-actions-nav {
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
    gap: 0.625rem;
    flex-shrink: 0;
}

.ilearnzed-navbar .desktop-nav .navbar-nav:last-child .nav-link,
.ilearnzed-navbar .institutional-actions-nav .nav-link {
    min-height: var(--nav-btn-height);
    padding: 0.5rem 0.75rem;
}

/* Bell / messages — icon-only, centered, consistent size */
.ilearnzed-navbar .institutional-actions-nav .nav-item.position-relative .nav-link {
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
    min-height: 2.5rem;
    padding: 0 !important;
    justify-content: center;
    gap: 0;
    position: relative;
}

.ilearnzed-navbar .institutional-actions-nav .nav-item.position-relative .nav-link i {
    font-size: 1.25rem;
    width: auto;
    min-width: 0;
}

.ilearnzed-navbar .institutional-actions-nav .badge-notify {
    top: 0.125rem;
    right: 0.125rem;
    min-width: 1.125rem;
    height: 1.125rem;
    font-size: 0.65rem;
    padding: 0 0.25rem;
    line-height: 1.125rem;
    border-radius: 999px;
    animation: none;
}

/* Profile dropdown */
.ilearnzed-navbar .institutional-actions-nav .dropdown .nav-link {
    gap: 0.5rem;
    padding: 0.375rem 0.625rem 0.375rem 0.375rem !important;
}

.ilearnzed-navbar .institutional-actions-nav .dropdown .nav-link img.rounded-circle {
    width: 32px !important;
    height: 32px !important;
    object-fit: cover;
    flex-shrink: 0;
}

.ilearnzed-navbar .institutional-actions-nav .dropdown .nav-link .fa-chevron-down {
    font-size: 0.75rem;
    width: auto;
    min-width: 0;
    margin-left: 0.125rem !important;
    opacity: 0.7;
}

/* Login as text, Sign Up as primary button */
.ilearnzed-navbar .navbar-nav:last-child .nav-link[href*="login"] {
    color: var(--navbar-text, #374151);
}

.ilearnzed-navbar .navbar-nav:last-child .nav-link[href*="login"]:hover {
    background: rgba(0, 0, 0, 0.05);
}

.ilearnzed-navbar .navbar-nav:last-child .nav-link[href*="register"],
.ilearnzed-navbar .nav-link.nav-btn-primary {
    background: var(--zambia-green, #00A651);
    color: #fff !important;
    padding: 0.5rem var(--nav-btn-padding-x);
}

.ilearnzed-navbar .navbar-nav:last-child .nav-link[href*="register"]:hover,
.ilearnzed-navbar .nav-link.nav-btn-primary:hover {
    background: #059669 !important;
    color: #fff !important;
}

/* Dropdown styling */
.ilearnzed-navbar .desktop-nav .dropdown .nav-link {
    padding-right: 0.75rem;
}

.ilearnzed-navbar .desktop-nav .dropdown-toggle::after {
    display: none;
}

.ilearnzed-navbar .desktop-nav .nav-link .nav-chevron {
    font-size: 0.7rem;
    width: auto;
    min-width: 0;
    opacity: 0.65;
    margin-left: 0.125rem !important;
}

.ilearnzed-navbar .desktop-nav .dropdown-menu {
    margin-top: 0.25rem;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.ilearnzed-navbar .desktop-nav .dropdown-item {
    padding: 0.625rem 1rem;
    font-size: var(--nav-font-size);
}

/* ========== MOBILE TOGGLE ========== */
.ilearnzed-navbar .navbar-toggler,
.ilearnzed-navbar #mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border: none;
    border-radius: 10px;
    background: var(--zambia-green, #00A651);
    color: #fff;
    cursor: pointer;
    transition: all var(--nav-transition);
    -webkit-tap-highlight-color: transparent;
}

.ilearnzed-navbar .navbar-toggler:hover,
.ilearnzed-navbar #mobile-menu-toggle:hover {
    background: #059669;
    transform: translateY(-1px);
}

.ilearnzed-navbar .navbar-toggler:focus,
.ilearnzed-navbar .navbar-toggler:focus-visible,
.ilearnzed-navbar #mobile-menu-toggle:focus,
.ilearnzed-navbar #mobile-menu-toggle:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 166, 81, 0.3);
}

/* ========== RESPONSIVE: TABLET & MOBILE ========== */
/* Slightly tighter primary nav on medium-wide screens (many teacher links) */
@media (max-width: 1400px) {
    .ilearnzed-navbar .desktop-nav .navbar-nav.me-auto,
    .ilearnzed-navbar .desktop-nav .institutional-primary-nav {
        gap: 0.375rem;
    }

    .ilearnzed-navbar .desktop-nav .nav-link {
        padding: 0.45rem 0.625rem;
        font-size: 0.875rem;
    }

    .ilearnzed-navbar .desktop-nav .nav-link i {
        font-size: 1.05rem;
    }
}

@media (max-width: 991.98px) {
    .ilearnzed-navbar {
        --nav-height: 64px;
        --nav-logo-height: 42px;
        --nav-padding-x: 1rem;
    }
    
    .ilearnzed-navbar .container {
        padding-left: var(--nav-padding-x) !important;
        padding-right: var(--nav-padding-x) !important;
        min-height: var(--nav-height);
    }
    
    .ilearnzed-navbar .navbar-brand {
        margin-left: 0.5rem;
    }
    
    .ilearnzed-navbar .navbar-brand img {
        height: var(--nav-logo-height);
    }
    
    .ilearnzed-navbar #mobile-menu-toggle {
        width: 44px;
        height: 44px;
        margin-left: auto;
    }
}

@media (max-width: 575.98px) {
    .ilearnzed-navbar {
        --nav-height: 60px;
        --nav-logo-height: 38px;
        --nav-padding-x: 0.75rem;
    }
    
    .ilearnzed-navbar .navbar-brand img {
        height: var(--nav-logo-height);
    }
    
    .ilearnzed-navbar #mobile-menu-toggle {
        width: 40px;
        height: 40px;
        min-width: 40px;
        min-height: 40px;
    }
}

/* ========== DARK THEME ========== */
[data-theme="dark"] .ilearnzed-navbar {
    background: var(--navbar-bg);
    border-bottom-color: var(--navbar-border);
}