/* ==========================================================================
   HEADER — Sticky navbar, logo, nav links, login button, mobile menu
   ========================================================================== */

/* ── Site header ───────────────────────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--clr-white);
    border-bottom: 1px solid transparent;
    transition:
        border-color var(--duration) var(--ease),
        box-shadow var(--duration) var(--ease),
        background var(--duration) var(--ease);
}

.site-header.is-scrolled {
    border-bottom-color: var(--clr-border);
    box-shadow: 0 2px 20px rgba(0,0,0,.07);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

/* ── Logo ──────────────────────────────────────────────────────────────── */
.site-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    text-decoration: none;
}
.site-logo img {
    height: 48px;
    width: auto;
}
.site-logo .custom-logo {
    height: 48px;
    width: auto;
}

/* ── Primary navigation ────────────────────────────────────────────────── */
.nav-primary {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-primary ul {
    display: flex;
    align-items: center;
    gap: clamp(24px, 3vw, 48px);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-primary ul li a {
    font-size: .9375rem;
    font-weight: var(--fw-medium);
    color: var(--clr-gray-800);
    text-decoration: none;
    padding: 6px 0;
    position: relative;
    transition: color var(--duration) var(--ease);
}

/* Underline indicator */
.nav-primary ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--clr-p500);
    border-radius: 2px;
    transition: width var(--duration) var(--ease);
}
.nav-primary ul li a:hover { color: var(--clr-p600); }
.nav-primary ul li a:hover::after { width: 100%; }
.nav-primary ul li.current-menu-item a { color: var(--clr-p500); }
.nav-primary ul li.current-menu-item a::after { width: 100%; }

/* ── Header CTA (Login button) ─────────────────────────────────────────── */
.header-cta {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-login {
    display: inline-flex;
    align-items: center;
    font-size: .9rem;
    font-weight: var(--fw-semibold);
    color: var(--clr-white);
    background: var(--clr-black);
    border: 2px solid var(--clr-black);
    padding: 10px 24px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    transition:
        background var(--duration) var(--ease),
        color var(--duration) var(--ease);
}
.btn-login:hover {
    background: var(--clr-p500);
    border-color: var(--clr-p500);
    color: var(--clr-white);
}

/* ── Hamburger button (mobile) ─────────────────────────────────────────── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--duration) var(--ease);
    flex-shrink: 0;
    gap: 0;
}
.hamburger:hover { background: var(--clr-gray-100); }

.hamburger__line {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--clr-text);
    border-radius: 2px;
    transition:
        transform 0.35s var(--ease),
        opacity 0.25s var(--ease),
        margin 0.35s var(--ease);
    margin: 3px 0;
}

/* Hamburger → X transform */
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ── Mobile menu drawer ────────────────────────────────────────────────── */
.mobile-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--clr-white);
    border-top: 1px solid var(--clr-border);
    box-shadow: 0 8px 40px rgba(0,0,0,.12);
    padding: 24px var(--gutter) 32px;
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition:
        transform 0.35s var(--ease),
        opacity 0.35s var(--ease),
        visibility 0.35s;
    z-index: 999;
}

.mobile-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

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

.mobile-menu nav ul li {
    border-bottom: 1px solid var(--clr-border);
}
.mobile-menu nav ul li:last-child { border-bottom: none; }

.mobile-menu nav ul li a {
    display: block;
    font-size: 1.0625rem;
    font-weight: var(--fw-medium);
    color: var(--clr-gray-800);
    padding: 14px 0;
    text-decoration: none;
    transition: color var(--duration) var(--ease), padding-left var(--duration) var(--ease);
}
.mobile-menu nav ul li a:hover { color: var(--clr-p500); padding-left: 6px; }
.mobile-menu nav ul li.current-menu-item a { color: var(--clr-p500); }

.mobile-menu-footer {
    margin-top: 20px;
}
.mobile-menu-footer .btn-login {
    width: 100%;
    justify-content: center;
}

/* ── Overlay (behind mobile menu) ──────────────────────────────────────── */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.3);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    z-index: 998;
    transition:
        opacity 0.35s var(--ease),
        visibility 0.35s;
}
.nav-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

/* ── Push body down for fixed header ───────────────────────────────────── */
body { padding-top: 72px; }
.page-template-page-login { padding-top: 0; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .nav-primary { display: none; }
    .hamburger { display: flex; }
    .header-cta .btn-login { display: none; }
}

@media (max-width: 480px) {
    .site-logo img,
    .site-logo .custom-logo { height: 40px; }
}