/* ==========================================================================
   LIVE配信研究所 - スポンサーセクション専用CSS
   スポンサー会社様一覧
   ========================================================================== */

/* ==========================================================================
   スポンサーセクション基本スタイル
   ========================================================================== */

body.home .sponsor-section,
body.page-sponsors .sponsor-section {
    padding: 2.5rem 0;
    background: rgba(10, 10, 26, 0.3);
    position: relative;
}

/* .section と重複する余白・背景を打ち消し（白い巨大カード化を防止） */
.section.sponsor-section {
    background: transparent !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    margin: 1rem auto !important;
    padding: 0 !important; /* 余白は .sponsor-section 側で管理 */
}
/* SWELLや他スタイルが付与する疑似要素の帯・オーバーレイを無効化 */
.sponsor-section::before,
.sponsor-section::after {
    content: none !important;
}
/* このセクション内だけは左右パディングの影響を取り除く */
.sponsor-section .custom-container {
    padding-left: 0 !important;
    padding-right: 0 !important;
}

body.home .sponsor-section .section-header,
body.page-sponsors .sponsor-section .section-header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 2rem;
}

body.home .sponsor-section .section-header::after,
body.page-sponsors .sponsor-section .section-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #FF6B6B, #4ECDC4, transparent);
    border-radius: 2px;
}

body.home .sponsor-section .section-title,
body.page-sponsors .sponsor-section .section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2C3E50;
    margin-bottom: 0;
}

/* ==========================================================================
   スポンサーグリッド - デスクトップ表示
   ========================================================================== */

body.home .sponsor-slider-wrapper,
body.page-sponsors .sponsor-slider-wrapper {
    position: relative;
    width: 100%;
    overflow: visible;
    display: flex;               /* 中央寄せの起点にする */
    justify-content: center;     /* 子の .sponsor-grid を中央へ */
}

body.home .sponsor-grid,
body.page-sponsors .sponsor-grid {
    display: grid;
    grid-template-columns: 1fr; /* SP初期値は1列 */
    gap: 2rem;
    padding: 0 1rem;
    max-width: 700px; /* SP基準コンテナ幅 */
    width: min(88vw, 700px);
    margin: 0 auto;
    transition: transform 0.4s ease;
    justify-content: center; /* グリッド自体を中央に */
    justify-items: center;   /* アイテムも中央に */
}

/* ==========================================================================
   スポンサーカードアイテム - 画像のみ表示
   ========================================================================== */

body.home .sponsor-card-item,
body.page-sponsors .sponsor-card-item {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    background: #FFFFFF;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    max-width: 720px; /* オーバーレイ内側より少し小さく */
    width: min(86vw, 720px);
    margin: 0 auto;
    box-sizing: border-box;
}

body.home .sponsor-card-item:hover,
body.page-sponsors .sponsor-card-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);
    border-color: rgba(0, 0, 0, 0.1);
}

body.home .sponsor-card-link,
body.page-sponsors .sponsor-card-link {
    display: flex;
    flex-direction: column;
    width: 100%;
    text-decoration: none;
    color: inherit;
}

/* ==========================================================================
   ロゴ画像
   ========================================================================== */

body.home .sponsor-logo-wrapper,
body.page-sponsors .sponsor-logo-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    box-sizing: border-box;
}

body.home .sponsor-logo,
body.page-sponsors .sponsor-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    transition: transform 0.3s ease;
}

body.home .sponsor-card-item:hover .sponsor-logo,
body.page-sponsors .sponsor-card-item:hover .sponsor-logo {
    transform: scale(1.02);
}

/* ==========================================================================
   事務所名表示
   ========================================================================== */

body.home .sponsor-company-name,
body.page-sponsors .sponsor-company-name {
    padding: 20px 24px 28px;
    text-align: center;
    font-size: clamp(20px, 5vw, 28px);
    font-weight: 700;
    color: #2C3E50;
    background: #FFFFFF;
    box-sizing: border-box;
    line-height: 1.5;
    letter-spacing: 0.5px;
    white-space: nowrap; /* 改行させない */
    word-break: normal;
    overflow: visible;
}

/* ==========================================================================
   スライダーコントロール（モバイル用） - 削除済み
   ========================================================================== */
/* スライダーコントロールとドットは使用しません（自動スクロール形式） */

/* ==========================================================================
   タブレット表示（768px - 1199px）
   ========================================================================== */

@media (max-width: 1199px) and (min-width: 768px) {
    body.home .sponsor-grid,
    body.page-sponsors .sponsor-grid {
        grid-template-columns: repeat(2, 1fr); /* タブレットは2列 */
        gap: 1.5rem;
    }
    
    body.home .sponsor-section .section-title,
    body.page-sponsors .sponsor-section .section-title {
        font-size: 2rem;
    }
}

/* デスクトップ（1200px以上）は3列グリッドに戻す */
@media (min-width: 1200px) {
    body.home .sponsor-grid,
    body.page-sponsors .sponsor-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
        max-width: 1200px;    /* 3列で気持ちよく収まる幅 */
        width: 100%;
        justify-content: center;
        justify-items: stretch;
    }

    body.home .sponsor-card-item,
    body.page-sponsors .sponsor-card-item {
        max-width: none;      /* SP用の固定幅を解除 */
        width: 100%;
        margin: 0;            /* グリッド内でフル幅 */
    }

    body.home .sponsor-logo-wrapper,
    body.page-sponsors .sponsor-logo-wrapper {
        padding: 24px;
        min-height: 180px;    /* デスクトップは少し余裕を持たせる */
    }

    body.home .sponsor-company-name,
    body.page-sponsors .sponsor-company-name {
        font-size: 20px;      /* PCでの視認性を確保 */
        padding: 18px 20px 24px;
    }
}

/* ==========================================================================
   モバイル表示（767px以下）- スライダー形式
   ========================================================================== */

@media (max-width: 767px) {
    body.home .sponsor-section,
    body.page-sponsors .sponsor-section {
        padding: 2.6rem 0 3rem 0; /* ヘッダーとタイトルの間隔を少し広げる */
        min-height: 70vh;
    }
    
    body.home .sponsor-section .section-header,
    body.page-sponsors .sponsor-section .section-header {
        margin-bottom: 3rem;
        padding-bottom: 2rem;
    }
    
    body.home .sponsor-section .section-title,
    body.page-sponsors .sponsor-section .section-title {
        font-size: 1.8rem;
        padding: 0 1rem;
    }
    
    body.home .sponsor-slider-wrapper,
    body.page-sponsors .sponsor-slider-wrapper {
        position: relative;
        padding: 0 1rem;
        margin-bottom: 2rem;
    }
    
    /* モバイル: 2列グリッドレイアウト */
    body.page-sponsors .sponsor-grid {
        display: grid !important;
        grid-template-columns: 1fr !important; /* モバイル1列 */
        gap: 1.5rem !important;
        overflow-x: visible !important;
        justify-content: flex-start !important;  /* 左寄せ */
        justify-items: start !important;         /* 左寄せ */
    }
    
    /* home.php用は横スクロールを維持 */
    body.home .sponsor-grid {
        display: flex;
        flex-wrap: nowrap;
        gap: 1rem;
        padding: 0;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    body.home .sponsor-grid::-webkit-scrollbar {
        display: none;
    }
    
    body.home .sponsor-card-item {
        flex: 0 0 85%;
        min-width: 85%;
        scroll-snap-align: center;
    }
    
    body.page-sponsors .sponsor-card-item {
        min-height: auto; /* 固定高さを撤廃し内容に応じて可変 */
        width: min(80vw, 660px); /* さらに小さくしてオーバーレイ内に収める */
        margin-left: 0 !important; /* 左寄せに合わせる */
    }
    
    body.page-sponsors .sponsor-logo-wrapper {
        aspect-ratio: 4 / 3;
        padding: 12px;
        min-height: 170px; /* さらに内側へ */
    }
    
    body.home .sponsor-logo-wrapper {
        min-height: 180px;
        padding: 25px;
    }
    
    body.page-sponsors .sponsor-company-name {
        font-size: clamp(18px, 5vw, 24px);
        padding: 18px 16px 22px;
        min-height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
        white-space: nowrap; /* モバイルでも改行禁止 */
    }
    
    body.home .sponsor-company-name {
        font-size: 14px;
        padding: 15px 10px 20px;
        min-height: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ==========================================================================
   超小型デバイス（375px以下）
   ========================================================================== */

@media (max-width: 375px) {
    body.home .sponsor-section .section-title,
    body.page-sponsors .sponsor-section .section-title {
        font-size: 1.5rem;
    }
    
    body.home .sponsor-card-item,
    body.page-sponsors .sponsor-card-item {
        flex: 0 0 90%;
        min-width: 90%;
    }
}

/* ==========================================================================
   アクセシビリティ
   ========================================================================== */

body.home .sponsor-card-link:focus,
body.page-sponsors .sponsor-card-link:focus {
    outline: 3px solid #FF6B6B;
    outline-offset: 3px;
}

body.home .sponsor-slider-btn:focus,
body.page-sponsors .sponsor-slider-btn:focus {
    outline: 3px solid #FF6B6B;
    outline-offset: 3px;
}

/* キーボードナビゲーション */
@media (prefers-reduced-motion: reduce) {
    body.home .sponsor-card-item,
    body.home .sponsor-logo,
    body.home .sponsor-btn,
    body.home .sponsor-slider-btn,
    body.home .sponsor-grid,
    body.page-sponsors .sponsor-card-item,
    body.page-sponsors .sponsor-logo,
    body.page-sponsors .sponsor-btn,
    body.page-sponsors .sponsor-slider-btn,
    body.page-sponsors .sponsor-grid {
        transition: none;
    }
}