/* ============================================================
   nav.css
   ナビゲーション / ハンバーガー / モバイルメニュー
   AUREA SOL LEVANS — aureasollevans-theme
============================================================ */

/* ── ナビゲーション ──────────────────────────────────────── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: 1.2rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.4s ease, box-shadow 0.4s ease;
    /* トップページ以外は常時ダーク背景 */
    background: rgba(26,26,26,0.96);
    box-shadow: 0 1px 0 rgba(184,151,58,0.3);
}

/* トップページのみ：スクロール前は透明 */
body.home nav {
    background: transparent;
    box-shadow: none;
}
body.home nav.scrolled {
    background: rgba(26,26,26,0.96);
    box-shadow: 0 1px 0 rgba(184,151,58,0.3);
}

/* ── ロゴ ────────────────────────────────────────────────── */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
}
.nav-logo-text {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: var(--gold);
    line-height: 1.3;
}
.nav-logo-sub {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.55rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--warm-gray);
}

/* ── デスクトップリンク ──────────────────────────────────── */
.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    padding-right: 6rem;
}
.nav-links a {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    color: var(--on-dark-sub);
    text-decoration: none;
    transition: color 0.3s;
    text-transform: uppercase;
}
.nav-links a:hover,
.nav-links a.current { color: var(--gold-light); }

/* ── ハンバーガー ────────────────────────────────────────── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.2rem;
    height: 2.2rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}
.hamburger span {
    display: block;
    width: 100%;
    height: 1px;
    background: var(--gold);
    transition: all 0.35s ease;
    transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── モバイルメニュー ────────────────────────────────────── */
#mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 998;
    background: rgba(26,26,26,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
}
#mobile-menu.open { display: flex; }

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}
.mobile-nav-links a {
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.25em;
    color: var(--on-dark);
    text-decoration: none;
    text-transform: uppercase;
    transition: color 0.3s;
}
.mobile-nav-links a:hover,
.mobile-nav-links a.current { color: var(--gold-light); }

.mobile-lang-toggle {
    display: flex;
    border: 1px solid rgba(184,151,58,0.5);
}
.mobile-lang-toggle button {
    background: transparent;
    border: none;
    padding: 0.5rem 1.2rem;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    cursor: pointer;
    color: var(--gold-pale);
    transition: all 0.3s;
}
.mobile-lang-toggle button.active {
    background: var(--gold);
    color: var(--charcoal);
}

/* ── レスポンシブ ────────────────────────────────────────── */
@media (max-width: 768px) {
    nav { padding: 1rem 1.2rem; }
    .nav-links { display: none; }
    .hamburger { display: flex; }
}