/* ==========================================================================
   シーバスセクション サブナビゲーション
   fish/seabass/ 配下の全ページで共通使用
   ========================================================================== */

/* CSS変数（シーバス用） */
:root {
    --seabass-primary: #14b8a6;
    --seabass-primary-dark: #0f766e;
    --seabass-secondary: #0ea5e9;
}

/* ===== サブナビゲーション ===== */
.subnav {
    background: white;
    border-bottom: 2px solid #99f6e4;
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.subnav > .container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 0 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* パンくずリスト */
.subnav .breadcrumb {
    font-size: 13px;
    color: #64748b;
}

.subnav .breadcrumb a {
    color: var(--seabass-primary);
    text-decoration: none;
}

.subnav .breadcrumb a:hover {
    text-decoration: underline;
}

.subnav .breadcrumb span {
    margin: 0 6px;
    color: #cbd5e1;
}

/* ナビリンク */
.subnav-links {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.subnav-links > a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    background: #f0fdfa;
    color: #1e293b;
    border: 2px solid #99f6e4;
    transition: all 0.3s;
    white-space: nowrap;
}

.subnav-links > a:hover,
.subnav-links > a.active {
    background: var(--seabass-primary);
    color: white;
    border-color: var(--seabass-primary);
}

/* ドロップダウン */
.subnav-dropdown {
    position: relative;
}

.subnav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    background: #f0fdfa;
    color: #1e293b;
    border: 2px solid #99f6e4;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.subnav-dropdown-toggle:hover,
.subnav-dropdown:hover .subnav-dropdown-toggle,
.subnav-dropdown.active-parent .subnav-dropdown-toggle {
    background: var(--seabass-primary);
    color: white;
    border-color: var(--seabass-primary);
}

.subnav-dropdown-toggle::after {
    content: '▼';
    font-size: 8px;
    margin-left: 2px;
    transition: transform 0.3s;
}

.subnav-dropdown:hover .subnav-dropdown-toggle::after {
    transform: rotate(180deg);
}

/* ドロップダウンメニュー */
.subnav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 150px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.3s;
    z-index: 200;
    border: 1px solid #e2e8f0;
}

.subnav-dropdown:hover .subnav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.subnav-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 600;
    color: #1e293b;
    text-decoration: none;
    transition: all 0.2s;
}

.subnav-dropdown-menu a:hover {
    background: #f0fdfa;
    color: var(--seabass-primary);
}

.subnav-dropdown-menu a.active {
    background: var(--seabass-primary);
    color: white;
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
    .subnav {
        padding: 10px 0;
    }
    
    .subnav > .container {
        gap: 8px;
    }
    
    .subnav-links {
        gap: 4px;
    }
    
    .subnav-links > a,
    .subnav-dropdown-toggle {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .subnav-dropdown-menu {
        min-width: 130px;
    }
    
    .subnav-dropdown-menu a {
        padding: 7px 12px;
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .subnav .breadcrumb {
        font-size: 11px;
    }
    
    .subnav-links > a,
    .subnav-dropdown-toggle {
        padding: 4px 8px;
        font-size: 10px;
    }
}