/* 全局樣式 */
:root {
    --primary-color: #2C3E50;
    --secondary-color: #34495E;
    --accent-color: #3498DB;
    --hover-color: rgba(52, 152, 219, 0.1);
    --text-color: #2C3E50;
    --light-text: #7F8C8D;
    --border-radius: 12px;
    --transition-speed: 0.3s;
    --menu-indent: 2.5rem;
    --menu-bg: #ffffff;
    --menu-text: #2C3333;
    --menu-hover-bg: #f8f9fa;
    --menu-hover-text: #4F6F52;
    --menu-active-bg: #e9ecef;
    --menu-active-text: #4F6F52;
    --menu-border: rgba(0, 0, 0, 0.1);
    --menu-shadow: rgba(0, 0, 0, 0.1);
    --submenu-bg: #ffffff;
    --submenu-text: #666666;
    --submenu-hover-bg: #f8f9fa;
    --submenu-hover-text: #4F6F52;
    --menu-icon-color: #666666;
    --menu-scrollbar-thumb: #cccccc;
    --menu-scrollbar-track: #f1f1f1;
    --top-bar-bg: #ffffff;
}

/* 定義深色模式變量 */
@media (prefers-color-scheme: dark) {
    :root {
        --menu-bg: #1e1e1e;
        --menu-text: #e0e0e0;
        --menu-hover-bg: #2d2d2d;
        --menu-hover-text: #ffffff;
        --menu-active-bg: #333333;
        --menu-active-text: #ffffff;
        --menu-border: rgba(255, 255, 255, 0.1);
        --menu-shadow: rgba(0, 0, 0, 0.3);
        --submenu-bg: #1e1e1e;
        --submenu-text: #a0a0a0;
        --submenu-hover-bg: #2d2d2d;
        --submenu-hover-text: #ffffff;
        --menu-icon-color: #a0a0a0;
        --menu-scrollbar-thumb: #404040;
        --menu-scrollbar-track: #2d2d2d;
        --top-bar-bg: #1e1e1e;
    }
}

body {
    color: var(--text-color);
}

/* 側邊欄基礎樣式 */
.sidebar {
    background-color: var(--menu-bg);
    color: var(--menu-text);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    height: 100vh;
    position: fixed !important;
    overflow-y: auto;
    transition: all var(--transition-speed) ease;
    padding: 1.5rem !important;
}

/* 頂部導航欄樣式 */
.top-sm {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1020;
    height: 60px;
    background-color: var(--top-bar-bg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.container-fluid {
    border-bottom: none !important;
}

/* Logo 容器樣式 */
.menu-logo-container {
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--menu-border);
}

.menu-logo {
    max-height: 50px;
    width: auto;
    transition: transform var(--transition-speed);
    border-bottom: 1px solid var(--menu-border);
    content: url('/img/logo.png');
}

@media (prefers-color-scheme: dark) {
    .menu-logo {
        content: url('/img/logo-dark.png');
    }
}

.menu-logo:hover {
    transform: scale(1.05);
}

/* 導航項目基礎樣式 */
.nav-item {
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    list-style: none;
    padding: 0;
}

.nav {
    padding-left: 0;
}

/* 導航鏈接樣式 */
.nav-link {
    color: var(--menu-text) !important;
    padding: 0.8rem 1rem !important;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
    display: flex !important;
    align-items: center;
    font-weight: 500;
    text-decoration: none;
    position: relative;
}

/* 子菜單樣式 */
.submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed);
    padding-left: calc(var(--menu-indent) - 0.5rem);
    margin: 0.2rem 0;
    position: relative;
    opacity: 0;
    transition: all var(--transition-speed) ease-out;
    background-color: var(--submenu-bg);
}

.submenu.show {
    max-height: 1000px;
    opacity: 1;
}

/* 移除垂直線 */
.submenu::before {
    display: none;
}

.submenu .nav-item {
    position: relative;
    margin-bottom: 0.3rem;
}

/* 移除水平線 */
.submenu .nav-item::before {
    display: none;
}

.submenu .nav-link {
    padding: 0.5rem 1rem !important;
    color: var(--submenu-text) !important;
    font-weight: normal;
    font-size: 0.95rem;
    margin-left: 0.5rem;
}

.submenu .menu-icon {
    font-size: 0.9rem;
}

/* 主選單項目樣式 */
.nav > .nav-item > .nav-link {
    font-weight: 600;
    padding: 0.8rem 1.2rem !important;
}

.nav > .nav-item > .nav-link .menu-icon {
    font-size: 1.1rem;
}

/* 活動狀態樣式 */
.nav-link.active {
    background-color: var(--menu-active-bg);
    color: var(--menu-active-text) !important;
}

.submenu .nav-link:hover {
    background-color: var(--submenu-hover-bg);
    transform: translateX(5px);
    color: var(--submenu-hover-text);
}

/* 箭頭圖標樣式 */
.arrow-icon {
    border: solid var(--menu-text);
    border-width: 0 2px 2px 0;
    display: inline-block;
    padding: 3px;
    transform: rotate(45deg);
    transition: transform var(--transition-speed);
    margin-left: auto;
}

.nav-link.active .arrow-icon {
    transform: rotate(-135deg);
    border-color: var(--accent-color);
}

/* 選單圖標樣式 */
.menu-icon {
    margin-right: 1rem;
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--menu-icon-color);
}

.nav-link:hover .menu-icon {
    color: var(--accent-color);
}

/* Offcanvas 樣式 */
.offcanvas-start {
    width: 280px !important;
    background-color: var(--menu-bg) !important;
    border: none;
}

.offcanvas-header {
    padding: 1.5rem;
    border-bottom: none;
}

.offcanvas-header .btn-close {
    display: none;
}

.offcanvas-body {
    padding: 1.5rem;
}

/* 響應式調整 */
@media (max-width: 1199.98px) {
    .sidebar {
        display: none !important;
    }
    
    .top-sm {
        display: block !important;
    }

    /* 確保內容區域在小螢幕時佔滿寬度且不會被menu重疊 */
    .main {
        width: 100% !important;
        margin-left: 0 !important;
        padding-top: 60px !important; /* 為頂部導航欄留出空間 */
    }
}

@media (min-width: 1200px) {
    .top-sm {
        display: none !important;
    }

    /* 大螢幕時保持側邊欄固定寬度 */
    .sidebar {
        width: 280px !important;
        display: block !important;
        z-index: 1030; /* 確保側邊欄在適當的層級 */
    }

    /* 大螢幕時內容區域需要留出側邊欄的空間 */
    .main {
        margin-left: 280px  !important;
        width: calc(100% - 280px);
        min-height: 100vh;
        padding: 1.5rem;
        transition: margin-left var(--transition-speed);
    }
}

/* Offcanvas 在小螢幕時的寬度調整 */
@media (max-width: 1199.98px) {
    .offcanvas-start {
        width: 300px !important;
    }
}

/* 特小螢幕的額外調整 */
@media (max-width: 575.98px) {
    .offcanvas-start {
        width: 280px !important;
    }

    .menu-logo {
        max-height: 50px;
    }

    .nav-link {
        padding: 0.6rem 1rem !important;
    }
}

/* 滾動條樣式 */
.sidebar::-webkit-scrollbar,
.offcanvas-body::-webkit-scrollbar {
    width: 5px;
}

.sidebar::-webkit-scrollbar-track,
.offcanvas-body::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.sidebar::-webkit-scrollbar-thumb,
.offcanvas-body::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 10px;
}

/* 漢堡選單按鈕樣式 */
.navbar-toggler {
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed);
    background-color: var(--menu-bg);
}

.navbar-toggler:hover {
    background-color: var(--menu-hover-bg);
}

.navbar-toggler-icon {
    width: 24px;
    height: 24px;
    background-image: url('/img/menus.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

@media (prefers-color-scheme: dark) {
    .navbar-toggler {
        border-color: var(--menu-border);
    }

    .navbar-toggler-icon {
        background-image: url('/img/menus-dark.png');
    }
}

/* 圖片按比例縮放 */
.bd-placeholder-img {
    object-fit: cover;
    height: 60%; /* 圖片占卡片的60%高度 */
}

.main{
    padding: 1em;
}