/* ===========================
   新しいナビゲーションスタイル
   0から作り直し
   =========================== */

/* 新しいナビゲーション */
nav.navbar {
    display: block !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 64px !important;
    background: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    z-index: 1800 !important;
    /* backdrop-filterをnoneで明示上書き（style.cssのblur(10px)を無効化）
       実際の背景ぼかしは::afterで描画。navbarにbackdrop-filterがあると
       position:fixed子要素の基準がnavbarになるため */
}

/* navbarの背景・ぼかし・影を::afterで描画（containing block問題を回避） */
nav.navbar::after {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08) !important;
    z-index: -1 !important;
    pointer-events: none !important;
    transition: background 0.3s ease, box-shadow 0.3s ease !important;
}

nav.navbar.scrolled::after {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
}

nav.navbar .container {
    max-width: 1400px !important;
    height: 100% !important;
    margin: 0 auto !important;
    padding: 0 24px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    position: relative !important;
    z-index: 1 !important;
}

/* ロゴエリア */
.navbar-brand {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    flex-shrink: 0 !important;
}

.navbar-brand h1 {
    font-size: 20px !important;
    font-weight: 700 !important;
    color: #0066ff !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: 1 !important;
}

.navbar-brand .tagline {
    font-size: 12px !important;
    color: #6b7280 !important;
    font-weight: 400 !important;
    white-space: nowrap !important;
}

/* ナビゲーションメニュー */
.navbar-nav {
    display: flex !important;
    align-items: center !important;
    list-style: none !important;
    margin: 0 !important;
    padding: 0 !important;
    gap: 24px !important;
    height: 100% !important;
}

.navbar-nav li {
    display: flex !important;
    align-items: center !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* リンクスタイル（デスクトップ・モバイル共通の水テーマ） */
.nav-link,
.navbar-nav > a {
    display: inline-flex !important;
    align-items: center !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    color: #374151 !important;
    white-space: nowrap !important;
    padding: 8px 16px !important;
    border-radius: 10px !important;
    position: relative !important;
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    /* 文字下の水色の下線 */
    text-decoration: underline !important;
    text-decoration-color: rgba(56, 189, 248, 0.45) !important;
    text-underline-offset: 5px !important;
    text-decoration-thickness: 1.5px !important;
    text-decoration-skip-ink: auto !important;
    /* 水の動きのトランジション */
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                background 0.35s ease,
                box-shadow 0.35s ease,
                color 0.3s ease,
                text-decoration-color 0.4s ease !important;
}

/* ホバー: 浮き上がり + 水の質感 + 下線フェードアウト（全リンク共通） */
.nav-link:hover,
.navbar-nav > a:hover {
    transform: translateY(-3px) !important;
    background: linear-gradient(
        135deg,
        rgba(56, 189, 248, 0.08) 0%,
        rgba(59, 130, 246, 0.12) 50%,
        rgba(14, 165, 233, 0.06) 100%
    ) !important;
    box-shadow:
        0 4px 16px rgba(56, 189, 248, 0.15),
        0 1px 4px rgba(59, 130, 246, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.5) !important;
    color: #0369a1 !important;
    text-decoration-color: transparent !important;
}

/* ハンバーガーメニュー */
.navbar-toggler {
    display: none !important;
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    background: none !important;
    border: none !important;
    cursor: pointer !important;
    position: relative !important;
    overflow: visible !important;
}

.navbar-toggler span {
    display: block !important;
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 20px !important;
    height: 2px !important;
    background: #374151 !important;
    transition: all 0.3s ease !important;
    transform-origin: center !important;
}

.navbar-toggler span:nth-child(1) {
    top: 13px !important;
}

.navbar-toggler span:nth-child(2) {
    top: 19px !important;
}

.navbar-toggler span:nth-child(3) {
    top: 25px !important;
}

.navbar-toggler.active span:nth-child(1) {
    top: 19px !important;
    transform: translateX(-50%) rotate(45deg) !important;
}

.navbar-toggler.active span:nth-child(2) {
    opacity: 0 !important;
}

.navbar-toggler.active span:nth-child(3) {
    top: 19px !important;
    transform: translateX(-50%) rotate(-45deg) !important;
}

/* 1200px以下 */
@media (max-width: 1200px) {
    .navbar-nav {
        gap: 16px !important;
    }
    
    .nav-link {
        font-size: 13px !important;
        padding: 6px 12px !important;
    }
    
    .navbar-brand .tagline {
        display: none !important;
    }
}

/* 1024px以下 - タブレット */
@media (max-width: 1024px) {
    .navbar-toggler {
        display: block !important;
    }

    /* バックドロップ: navbar内の::beforeで実装（スタッキングコンテキスト問題を回避） */
    nav.navbar.menu-open::before {
        content: '' !important;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100% !important;
        background: rgba(0, 0, 0, 0.4) !important;
        z-index: 1850 !important;
    }

    /* navbar内のコンテナをバックドロップより上に */
    nav.navbar.menu-open .container {
        position: relative !important;
        z-index: 1860 !important;
    }

    .navbar-nav {
        display: none !important;
        position: fixed !important;
        top: 50% !important;
        left: 50% !important;
        transform: translate(-50%, -50%) !important;
        width: 280px !important;
        max-width: 90vw !important;
        background: rgba(255, 255, 255, 0.95) !important;
        backdrop-filter: blur(20px) !important;
        -webkit-backdrop-filter: blur(20px) !important;
        flex-direction: column !important;
        padding: 32px 24px !important;
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15) !important;
        gap: 4px !important;
        height: auto !important;
        border-radius: 16px !important;
        z-index: 1900 !important;
        list-style: none !important;
    }

    .navbar-nav.active {
        display: flex !important;
    }

    .navbar-nav li,
    .navbar-nav > a {
        width: 100% !important;
        list-style: none !important;
    }

    /* --- メニュー内リンク共通 --- */
    .nav-link,
    .navbar-nav > a,
    .navbar-nav > a.btn-primary,
    .navbar-nav .nav-link.btn-login,
    .navbar-nav .nav-link.btn-register,
    .navbar-nav .nav-link.btn-contact {
        width: 100% !important;
        justify-content: center !important;
        padding: 14px 20px !important;
        font-size: 15px !important;
        font-weight: 500 !important;
        text-align: center !important;
        display: block !important;
        color: #374151 !important;
        background: none !important;
        border: none !important;
        border-radius: 10px !important;
        box-shadow: none !important;
        /* 文字下だけの下線（水色の川） */
        text-decoration: underline !important;
        text-decoration-color: rgba(56, 189, 248, 0.5) !important;
        text-underline-offset: 6px !important;
        text-decoration-thickness: 1.5px !important;
        text-decoration-skip-ink: auto !important;
        /* 滑らかな水の動きのトランジション */
        transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    background 0.35s ease,
                    box-shadow 0.35s ease,
                    color 0.3s ease,
                    text-decoration-color 0.4s ease !important;
    }

    /* --- ホバー: 浮き上がり + 水の質感 + 下線が消える --- */
    .nav-link:hover,
    .navbar-nav > a:hover,
    .navbar-nav > a.btn-primary:hover,
    .navbar-nav .nav-link.btn-login:hover,
    .navbar-nav .nav-link.btn-register:hover,
    .navbar-nav .nav-link.btn-contact:hover {
        transform: translateY(-3px) !important;
        background: linear-gradient(
            135deg,
            rgba(56, 189, 248, 0.08) 0%,
            rgba(59, 130, 246, 0.12) 50%,
            rgba(14, 165, 233, 0.06) 100%
        ) !important;
        box-shadow:
            0 4px 16px rgba(56, 189, 248, 0.15),
            0 1px 4px rgba(59, 130, 246, 0.08),
            inset 0 1px 0 rgba(255, 255, 255, 0.5) !important;
        color: #0369a1 !important;
        /* 川が消えるように下線がフェードアウト */
        text-decoration-color: transparent !important;
    }
}

/* 768px以下 - モバイル */
@media (max-width: 768px) {
    nav.navbar {
        height: 56px !important;
    }
    
    nav.navbar .container {
        padding: 0 16px !important;
    }
    
    .navbar-brand h1 {
        font-size: 18px !important;
    }
}

/* ヒーローセクション調整 */
.hero {
    margin-top: 64px !important;
}

@media (max-width: 768px) {
    .hero {
        margin-top: 56px !important;
    }
}

/* ハンバーガーアニメーション（上のセクションで定義済み）