/*
 * header-nav.css — Site Header & Mobile Navigation
 * Loaded globally via functions.php
 */

/* ── Header shell ── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 500;
    background: var(--n-surface);
    border-bottom: 1px solid var(--n-border);
    height: 60px;
}

.site-header__inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 100%;
}

/* ── Logo ── */
.site-header__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.site-header__logo-img {
    height: 36px;
    width: auto;
}

.site-header__logo-text {
    font-family: var(--n-font-sans);
    font-size: 18px;
    font-weight: 900;
    color: var(--n-text);
    letter-spacing: -0.03em;
    line-height: 1;
}

/* ── Desktop nav ── */
.site-header__nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.site-header__menu {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header__menu li a {
    display: block;
    font-family: var(--n-font-sans);
    font-size: 13px;
    font-weight: 600;
    color: var(--n-text2);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--n-r-sm);
    transition: color 0.12s, background 0.12s;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.site-header__menu li a:hover {
    color: var(--n-text);
    background: var(--n-bg2);
}

.site-header__menu li.is-current > a,
.site-header__menu li.current-menu-item > a,
.site-header__menu li.current_page_item > a {
    color: var(--n-green);
    background: var(--n-green-lt);
}

/* ── Hamburger ── */
.site-header__hamburger {
    display: none;
    flex-shrink: 0;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--n-r-sm);
}

.site-header__hamburger:hover {
    background: var(--n-bg2);
}

.site-header__hamburger-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--n-text);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

/* Hamburger open state */
.site-header__hamburger[aria-expanded="true"] .site-header__hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.site-header__hamburger[aria-expanded="true"] .site-header__hamburger-bar:nth-child(2) {
    opacity: 0;
}
.site-header__hamburger[aria-expanded="true"] .site-header__hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile nav drawer ── */
.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 400;
    pointer-events: none;
    visibility: hidden;
}

.mobile-nav[aria-hidden="false"] {
    pointer-events: auto;
    visibility: visible;
}

.mobile-nav__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity 0.25s;
}

.mobile-nav[aria-hidden="false"] .mobile-nav__overlay {
    opacity: 1;
}

.mobile-nav__inner {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(300px, 85vw);
    background: var(--n-surface);
    display: flex;
    flex-direction: column;
    padding: 16px 24px 32px;
    transform: translateX(100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    z-index: 1;
}

.mobile-nav[aria-hidden="false"] .mobile-nav__inner {
    transform: translateX(0);
}

.mobile-nav__close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 28px;
    line-height: 1;
    color: var(--n-text2);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--n-r-sm);
    margin-bottom: 8px;
}

.mobile-nav__close:hover {
    background: var(--n-bg2);
    color: var(--n-text);
}

.mobile-nav__menu {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
}

.mobile-nav__menu li {
    border-bottom: 1px solid var(--n-border);
}

.mobile-nav__menu li a {
    display: block;
    font-family: var(--n-font-sans);
    font-size: 16px;
    font-weight: 600;
    color: var(--n-text);
    text-decoration: none;
    padding: 14px 4px;
}

.mobile-nav__menu li.is-current > a,
.mobile-nav__menu li.current-menu-item > a {
    color: var(--n-green);
}

.mobile-nav__footer {
    padding-top: 24px;
}

.mobile-nav__sns {
    display: flex;
    gap: 16px;
    align-items: center;
}

.mobile-nav__sns a {
    color: var(--n-text3);
    transition: color 0.12s;
}

.mobile-nav__sns a:hover {
    color: var(--n-text);
}

/* ── Responsive ── */
@media (max-width: 860px) {
    .site-header__nav { display: none; }
    .site-header__hamburger { display: flex; }
    .site-header__inner { justify-content: space-between; }
}

@media (prefers-reduced-motion: reduce) {
    .mobile-nav__inner,
    .mobile-nav__overlay,
    .site-header__hamburger-bar { transition: none; }
}