/* ==========================================
   SideNavPanel 可重用組件
   版本: 2.0.0 — Claude.ai Minimal Style
   日期: 2026-03-13
   ========================================== */

/* 外層包裝（提供內邊距） */
.side-nav-panel-wrapper {
    padding: var(--spacing-lg);
}

/* 主容器佈局 */
.side-nav-panel-container {
    display: flex;
    gap: 0;
    height: calc(100vh - 180px);
}

/* 左側導航區 */
.side-nav-panel-nav {
    width: 180px;
    min-width: 180px;
    border-right: 1px solid rgba(128, 128, 128, 0.08);
    padding: 0.5rem 1rem 1rem 0;
    overflow-y: auto;
}

/* 導航項目 */
.side-nav-panel-item {
    width: 100%;
    padding: 10px 16px;
    margin-bottom: 2px;
    border: none;
    border-left: 2.5px solid transparent;
    background: transparent;
    color: var(--color-text-secondary, #999);
    font-size: 0.8125rem;
    font-weight: 450;
    text-align: left;
    cursor: pointer;
    border-radius: 0 8px 8px 0;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.side-nav-panel-item:hover {
    background: rgba(128, 128, 128, 0.06);
    color: var(--color-text-primary, #e8e8e8);
}

.side-nav-panel-item.active {
    background: rgba(var(--color-accent-rgb, 124, 110, 245), 0.08);
    color: var(--color-accent);
    font-weight: 500;
    border-left-color: var(--color-accent);
}

/* 項目圖示 */
.side-nav-panel-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* 右側內容區 */
.side-nav-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 0 0 1rem 2rem;
}

/* 內容頁面 */
.side-nav-panel-page {
    display: none;
}

.side-nav-panel-page.active {
    display: block;
}

/* ==================== Mobile ==================== */

@media (max-width: 480px) {
    .side-nav-panel-container {
        flex-direction: column;
        height: auto;
        min-height: calc(100vh - 180px);
    }

    .side-nav-panel-nav {
        width: 100%;
        min-width: unset;
        border-right: none;
        border-bottom: 1px solid rgba(128, 128, 128, 0.08);
        padding: 8px;
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 4px;
    }

    .side-nav-panel-item {
        flex-shrink: 0;
        white-space: nowrap;
        margin-bottom: 0;
        padding: 8px 14px;
        font-size: 13px;
        border-left: none;
        border-bottom: 2.5px solid transparent;
        border-radius: 8px 8px 0 0;
    }

    .side-nav-panel-item.active {
        border-left-color: transparent;
        border-bottom-color: var(--color-accent);
    }

    .side-nav-panel-content {
        width: 100%;
        padding: 12px;
    }

    .side-nav-panel-wrapper {
        padding: var(--spacing-sm, 8px);
    }
}