/* ========================================
   Global Styles & Variables
   ======================================== */

/* 導入統一的色彩配置 */
@import url('colors-config.css');

/* 如果不想用外部檔案，可以直接在上面定義 :root 變數 */

/* ========================================
   Base Styles
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    /* 基準值 */
}

body {
    font-family: var(--font-sans);
    color: var(--primary-dark);
    background-color: var(--white);
    line-height: 1.6;
    font-size: 1rem;
    /* 等於 16px */

}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
}

/* ========================================
   Container & Layout
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-500);
}

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.navbar {
    padding: var(--spacing-md) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 50px;
    height: 50px;
    display: inline-block;
    vertical-align: middle;

    /* 1. 顏色來源：鎖定你的主色漸層 */
    background: var(--gradient-primary);

    /* 2. 形狀來源：指定你的 code.svg 路徑 */
    /* 注意：路徑是相對於你的 CSS 檔案位置 */
    -webkit-mask: url('../images/code.svg') no-repeat center;
    mask: url('../images/code.svg') no-repeat center;

    -webkit-mask-size: contain;
    mask-size: contain;
}

.nav-container h1 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
    /* font-weight: 800; */
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
    padding-bottom: var(--spacing-xs);
    transition: color var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}


/* --- 下拉選單基礎設定 --- */
.dropdown {
    position: relative;
    display: inline-block;
}

/* 下拉內容容器 */
.dropdown-content {
    display: none;
    /* 預設隱藏 */
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.1);
    z-index: 1;
    border-radius: 4px;
    top: 100%;
    /* 緊貼導覽列下方 */
}

/* 下拉內的連結樣式 */
.dropdown-content a {
    color: var(--text-main);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.dropdown-content a:hover {
    background-color: #f1f1f1;
    color: var(--primary);
}

/* 滑鼠移入時顯示內容 */
.dropdown:hover .dropdown-content {
    display: block;
}

/* 讓按鈕在 Hover 時也有反應 */
.dropdown:hover .dropbtn {
    color: var(--primary);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    /* background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); */
    background-image: url(../images/herobg.jpg);
    background-size: cover;
    background-position: center;
    height: 50vh;
    color: white;
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    /* margin-bottom: var(--spacing-md); */
    line-height: 1.2;
}

/* ========================================
   Notes Section
   ======================================== */

.notes-section {
    background-color: var(--gray-50);
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

        /* --- 表格通用樣式 (Table) --- */
        table {
            width: 80%;
            /* border-collapse: collapse; */
            /* 重要：讓邊框合併 */
            border-collapse: separate;
            /* 改為 separate 才能做出圓角與間距感 */
            border-spacing: 0;
            /* 讓間距歸零，保持緊湊 */
            margin: 2.5rem auto;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            /* 配合圓角 */
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            /* 增加陰影感 */

        }

        table td {
            border: 0.5px solid var(--gray-200);
            padding: 15px;
            text-align: center;
            line-height: 1.5;
            color: var(--gray-600);
            transition: all 0.3s ease;
            /* 讓動畫平滑的核心 */
            position: relative;
        }

        /* 課表的第一列或標頭 */
        .course-schedule-notes tr:first-child td,
        .course-schedule-notes tr td:first-child {
            background-color: var(--primary-dark) !important;
            /* 強制覆蓋 */
            ;
            font-weight: 700;
            color: var(--gray-100);
        }

        .grid-table td:hover,
        td:hover {
            background-color: #ffffff;
            color: var(--primary-dark);
            transform: scale(1.01);
            /* 輕微放大 */
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            /* 浮起陰影 */
            z-index: 10;
            /* 確保放大時不會被隔壁遮住 */
            cursor: pointer;
            border-radius: 4px;
            /* 浮起時給一點圓角 */
        }

/* ========================================
   Courses Section
   ======================================== */

.courses-section {
    background-color: var(--gray-50);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

/* ========================================
   Course Cards
   ======================================== */

.course-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.course-card:hover::before {
    transform: scaleX(1);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary);
}


.course-card .hours {
    display: inline-block;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Stats Section
   ======================================== */

.stats-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: var(--spacing-3xl) 0;
}

.stats-section .section-header h2,
.stats-section .section-header p {
    color: white;
    background: none;
    -webkit-text-fill-color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl) var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.stat-text {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ========================================
   Note Cards
   ======================================== */

.note-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 2px solid transparent;
}

.note-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

.card-icon {
    font-size: 2.5rem;
}

.card-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-content {
    flex-grow: 1;
    margin-bottom: var(--spacing-lg);
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

.card-content p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.note-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

/* 程式碼標籤樣式 */
.note-item code {
    background: var(--gray-100, #f3f4f6);
    color: var(--danger);
    /* 突出顯示標籤 */
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Poppins', monospace;
    font-weight: 600;
    font-size: 0.9em;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    display: inline-block;
    background-color: var(--gray-100);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--primary);
    padding: var(--spacing-md) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-base);
}

.card-link:hover {
    border-bottom-color: var(--primary);
}

.card-link .arrow {
    transition: transform var(--transition-base);
    display: inline-block;
}

.card-link:hover .arrow {
    transform: translateX(4px);
}

/* ========================================
   About Section
   ======================================== */

.about-section {
    background-color: var(--white);
}

.about-content {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    border: 2px solid var(--primary);
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-900);
}

.about-text p {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 500;
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* 程式碼區塊樣式 */
.highlight-container {
    position: relative;
}

.highlight-container:hover .copy-btn,
.highlight-container .copy-btn:focus {
    opacity: 1;
}

.copy-btn {
    color: #333;
    cursor: pointer;
    line-height: 1.6;
    opacity: 0;
    padding: 2px 6px;
    position: absolute;
    transition-delay: 0s;
    transition-duration: 0.2s;
    transition-timing-function: ease-in-out;
    color: #fff;
    font-size: 14px;
    right: 0;
    top: 2px;
}

.highlight-container {
    background: #21252b;
    border-radius: 5px;
    box-shadow: 0 10px 30px 0 rgba(0, 0, 0, 0.4);
    padding-top: 30px;
}

.highlight-container::before {
    background: #fc625d;
    border-radius: 50%;
    box-shadow: 20px 0 #fdbc40, 40px 0 #35cd4b;
    content: ' ';
    height: 12px;
    left: 12px;
    margin-top: -20px;
    position: absolute;
    width: 12px;
}

.highlight-container .highlight {
    border-radius: 0 0 5px 5px;
}

.highlight-container .highlight .table-container {
    border-radius: 0 0 5px 5px;
}

.highlight,
pre {
    background: #000;
    color: #eaeaea;
    line-height: 1.6;
    margin: 0 auto 20px;
}

pre,
code {
    font-family: consolas, Menlo, monospace, "PingFang SC", "Microsoft YaHei";
}

code {
    background: #eee;
    border-radius: 3px;
    color: #555;
    padding: 2px 4px;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.highlight *::selection {
    background: #424242;
}

.highlight pre {
    border: 0;
    margin: 0;
    padding: 10px 0;
}

.highlight table {
    border: 0;
    margin: 0;
    width: auto;
}

.highlight td {
    border: 0;
    padding: 0;
}

.highlight figcaption {
    background: #292929;
    color: #eaeaea;
    display: flex;
    font-size: 0.875em;
    justify-content: space-between;
    line-height: 1.2;
    padding: 0.5em;
}

.highlight figcaption a {
    color: #eaeaea;
}

.highlight figcaption a:hover {
    border-bottom-color: #eaeaea;
}

.highlight .gutter {
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

.highlight .gutter pre {
    background: #292929;
    color: #666;
    padding-left: 10px;
    padding-right: 10px;
    text-align: right;
}

.highlight .code pre {
    background: #000;
    padding-left: 10px;
    width: 100%;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--gray-100);
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section p {
    color: var(--gray-300);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--gray-300);
    transition: color var(--transition-base);
}

.footer-section a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    /* border-top: 1px solid var(--gray-700); */
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--gray-400);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero-stats {
        gap: var(--spacing-xl);
    }

    .nav-links {
        gap: var(--spacing-lg);
    }

    .notes-grid {
        grid-template-columns: 1fr;
    }

    .about-content {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    section {
        padding: var(--spacing-2xl) 0;
    }

    .nav-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-links {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.note-card {
    animation: fadeInUp 0.5s ease-out;
}

.note-card:nth-child(2) {
    animation-delay: 0.1s;
}

.note-card:nth-child(3) {
    animation-delay: 0.2s;
}

.note-card:nth-child(4) {
    animation-delay: 0.3s;
}

/* ========================================
   Print Styles
   ======================================== */

@media print {

    .header,
    .footer {
        display: none;
    }
}