/**
 * Header & Navigation
 *
 * Site header, primary nav, dropdowns, mobile menu toggle,
 * and mobile-menu enhanced behaviours.
 *
 * @package IBCES
 */

/* ----------------------------------------
   Site Header
---------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

/* Offset header when WordPress admin bar is present */
.admin-bar .site-header {
    top: 32px;
}

@media screen and (max-width: 782px) {
    .admin-bar .site-header {
        top: 46px;
    }
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-sm);
}

/* ----------------------------------------
   Site Logo
---------------------------------------- */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

@media (max-width: 768px) {
    .site-logo img {
        height: 40px;
    }
}

.site-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.site-logo h1 span {
    color: var(--color-gold);
}

/* ----------------------------------------
   Primary Navigation
---------------------------------------- */
.primary-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    font-family: var(--font-secondary);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-black);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: width var(--transition-normal);
}

.nav-menu a:hover::after,
.nav-menu .current-menu-item a::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu .current-menu-item a {
    color: var(--color-primary);
}

/* ----------------------------------------
   Dropdown Menu
---------------------------------------- */
.nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 0;
}

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

.nav-menu .sub-menu li {
    width: 100%;
}

.nav-menu .sub-menu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.nav-menu .sub-menu a::after {
    display: none;
}

.nav-menu .sub-menu a:hover {
    background-color: var(--color-gray);
}

/* ----------------------------------------
   Header CTA
---------------------------------------- */
.header-cta {
    margin-left: var(--spacing-lg);
}

/* ----------------------------------------
   Mobile Menu Toggle
---------------------------------------- */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    flex-shrink: 0;
    z-index: 10;
    -webkit-tap-highlight-color: transparent;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}

/* Hamburger → Cross animation */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ── Close button: hidden on desktop, shown only in mobile drawer ── */
.nav-close-btn {
    display: none;
}

/* ----------------------------------------
   Mobile Menu Enhanced (sub-menu toggle)
---------------------------------------- */
.submenu-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: inherit;
}

@media (max-width: 1024px) {
    .submenu-toggle {
        display: block;
    }

    .menu-item-has-children {
        position: relative;
    }

    .menu-item-has-children > .sub-menu {
        display: none;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--color-gray-100);
        padding-left: 1rem;
    }

    .menu-item-has-children.submenu-open > .sub-menu {
        display: block;
    }
}

/* ----------------------------------------
   Responsive — Tablet
---------------------------------------- */
@media (max-width: 1024px) {
    .nav-menu {
        gap: var(--spacing-md);
    }

    .header-cta {
        display: none;
    }
}

/* ----------------------------------------
   Responsive — Mobile
---------------------------------------- */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    /* ── Dark backdrop behind the drawer ── */
    .nav-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.45);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 900;
    }

    .nav-backdrop.active {
        opacity: 1;
        visibility: visible;
    }

    /* ── Slide-in drawer (65 % from right) ── */
    .primary-nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: auto;
        width: 65%;
        max-width: 320px;
        background: #ffffff;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        box-shadow: -6px 0 32px rgba(0, 0, 0, 0.18);
        padding: 0;
        margin: 0;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 1001;
        display: flex;
        flex-direction: column;
        align-items: stretch;
    }

    .primary-nav.active {
        transform: translateX(0);
    }

    /* Remove old ::before overlay (replaced by .nav-backdrop) */
    .primary-nav::before {
        display: none;
    }

    /* ── Close button (visible only on mobile) ── */
    .nav-close-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        margin: 16px 16px 0 auto;
        border: none;
        border-radius: 50%;
        background: rgba(30, 58, 138, 0.08);
        color: var(--color-primary, #1E3A8A);
        font-size: 1.1rem;
        cursor: pointer;
        transition: background 0.2s, color 0.2s, transform 0.2s;
        -webkit-tap-highlight-color: transparent;
        flex-shrink: 0;
    }

    .nav-close-btn:hover,
    .nav-close-btn:active {
        background: var(--color-primary, #1E3A8A);
        color: #fff;
        transform: rotate(90deg);
    }

    /* ── Nav links ── */
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px 10px 0 10px;
        padding-inline-start: 10px;   /* override any UA stylesheet */
        -webkit-padding-start: 10px;
        margin: 0;
    }

    .nav-menu li {
        width: 100%;
        margin: 0;
        padding: 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 16px 0;
        margin: 0;
        font-size: 1.05rem;
        font-weight: 600;
        color: #1e293b;
        border-radius: 0;
        text-align: left;
        transition: color 0.2s;
    }

    .nav-menu a:hover {
        color: var(--color-primary);
        background: transparent;
        padding-left: 0;
    }

    .nav-menu .current-menu-item > a {
        color: var(--color-primary);
        background: transparent;
        font-weight: 700;
    }

    .nav-menu a::after {
        display: block;
        width: 0;
        left: 0;
        bottom: -2px;
        height: 2px;
        background-color: var(--color-gold);
        transition: width var(--transition-normal);
    }

    .nav-menu a:hover::after,
    .nav-menu .current-menu-item > a::after {
        width: 100%;
    }

    .nav-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 16px;
        display: none;
        border-radius: 0;
        background: transparent;
    }

    .nav-menu .sub-menu a {
        font-size: 0.9rem;
        font-weight: 500;
        padding: 11px 12px;
        color: #64748b;
    }

    .nav-menu .sub-menu a:hover {
        color: var(--color-primary);
        background: transparent;
    }

    .nav-menu li.submenu-open .sub-menu {
        display: block;
    }

    /* ── CTA inside drawer ── */
    .header-cta {
        display: block;
        margin: auto 0 0 0;
        padding: 20px 10px;
    }

    .header-cta .btn {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 14px 20px;
        font-size: 0.9rem;
        font-weight: 600;
        border-radius: 10px;
        border: none;
    }

    /* ── Hamburger above everything ── */
    .mobile-menu-toggle {
        z-index: 1002;
    }

    /* ── Hide chatbot when nav drawer is open ── */
    body.menu-open .ibces-chatbot-float {
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease;
    }
}