/* =========================================
   2. ヘッダー (PC/共通)
========================================= */
.site-navbar {
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    height: 72px;
    width: 100%;
    position: fixed;
    top: 0; left: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    border-bottom: 1px solid var(--border);
    z-index: 2000;
    box-sizing: border-box;
    gap: 32px;
}

/* ロゴ + タグライン */
.nav-logo-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 20px;
    font-weight: 800;
    color: var(--navy-900);
    text-decoration: none;
    letter-spacing: 0.04em;
    line-height: 1;
    flex-shrink: 0;
}

.site-logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.site-logo-text {
    font-family: 'Raleway', sans-serif;
    font-size: 21px;
    font-weight: 800;
    color: var(--navy-900);
    letter-spacing: 0.06em;
    line-height: 1;
}

.site-tagline {
    font-size: 9.5px;
    color: var(--text-muted);
    line-height: 1.55;
    letter-spacing: 0.01em;
    max-width: 190px;
    border-left: 1px solid var(--border);
    padding-left: 12px;
}

/* PC用メニューリンク */
.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.nav-links a {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    position: relative;
    padding-bottom: 4px;
    transition: opacity 0.15s;
}
.nav-links a:hover { opacity: 0.7; }

.nav-en {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.nav-ja {
    font-size: 9.5px;
    color: var(--text-muted);
    font-weight: 400;
    line-height: 1;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0; height: 1.5px;
    bottom: 0; left: 0;
    background-color: var(--navy-900);
    transition: width 0.2s ease;
}
.nav-links a:hover::after { width: 100%; }

/* エリアボタン */
.area-btn-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1.5px solid var(--navy-700);
    background: transparent;
    color: var(--navy-900);
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}
.area-btn-nav:hover {
    background: var(--navy-900);
    color: #fff;
}
.area-btn-nav i {
    font-size: 0.85em;
}
.area-btn-nav.is-set {
    background: var(--navy-100);
    border-color: var(--navy-200);
}

/* PCでは隠すもの（ハンバーガー関連） */
.hamburger-menu,
.close-menu,
.menu-overlay {
    display: none;
}

body.no-scroll {
    overflow: hidden;
}

/* =========================================
   4. フッター
========================================= */
.site-footer {
    background-color: var(--navy-900);
    color: rgba(255,255,255,0.6);
    padding: 0 40px;
    height: 72px;
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 80px;
}

.footer-social { display: flex; align-items: center; gap: 20px; }
.follow-text { font-weight: 600; font-size: 0.8em; margin-right: 8px; color: rgba(255,255,255,0.5); }
.social-icon {
    color: rgba(255,255,255,0.5); font-size: 1.1em; text-decoration: none; transition: color 0.2s;
}
.social-icon:hover { color: #fff; }

.back-to-top {
    background-color: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    padding: 8px 18px;
    text-decoration: none; color: rgba(255,255,255,0.6);
    font-size: 0.8em; font-weight: 500;
    border-radius: var(--radius-sm); transition: background-color 0.2s;
    display: flex; align-items: center; gap: 6px;
}
.back-to-top:hover { background-color: rgba(255,255,255,0.14); color: #fff; }


/* =========================================
   スマホ用ナビ & フッター
========================================= */
@media (max-width: 768px) {

    .site-navbar {
        padding: 0 20px;
        height: 64px;
    }

    .site-tagline { display: none; }

    .hamburger-menu {
        display: block;
        background: none;
        border: none;
        font-size: 24px;
        color: #1a2e45;
        cursor: pointer;
        padding: 10px;
    }

    .area-btn-nav { display: none; }

    /* ドロワーメニュー */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        height: 100vh;
        background-color: #ffffff;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: 80px 30px;
        box-shadow: -5px 0 20px rgba(0,0,0,0.1);
        transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        z-index: 2000;
        gap: 0;
    }
    .nav-links.active { right: 0; }

    .nav-links a {
        flex-direction: row;
        align-items: center;
        gap: 8px;
        padding: 20px 0;
        border-bottom: 1px solid #eee;
        width: 100%;
        display: flex;
        cursor: pointer;
        pointer-events: auto;
    }
    .nav-links a::after { display: none; }

    .nav-en { font-size: 15px; font-weight: 600; color: #333; }
    .nav-ja { font-size: 12px; color: #999; font-weight: 400; }

    .nav-links .contact-btn {
        margin-top: 40px;
        border: 1px solid #1a2e45;
        border-radius: 50px;
        justify-content: center;
        padding: 15px 0;
        cursor: pointer;
        pointer-events: auto;
        touch-action: manipulation;
    }

    .close-menu {
        display: block;
        position: absolute;
        top: 25px;
        right: 20px;
        background: none;
        border: none;
        font-size: 32px;
        color: #1a2e45;
        cursor: pointer;
        z-index: 2001;
    }

    /* オーバーレイ */
    .menu-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.05);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.4s;
        z-index: 1500;
    }

    .menu-overlay.active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .site-footer {
        flex-direction: column;
        height: auto;
        padding: 30px 20px;
        gap: 20px;
    }
}