/* 全局樣式設定 */
body {
    background-color: #f0f4f8;
    font-family: "Microsoft JhengHei", -apple-system, BlinkMacSystemFont, sans-serif;
    color: #333;
}

/* ================= 上欄 橫幅與導覽區樣式 ================= */
.banner-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.banner-img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    filter: drop-shadow(0px 8px 16px rgba(0, 0, 0, 0.08));
    transition: transform 0.3s ease;
}

/* 選單按鈕樣式 */
.nav-link2 {
    display: block;
    padding: 0.5rem 1rem;
    font-size: var(--bs-nav-link-font-size);
    font-weight: var(--bs-nav-link-font-weight);
    color: var(--bs-nav-link-color);
    text-decoration: none;
    
}

.custom-nav {
    background-color: #ffffff;
    border-radius: 50px;
    padding: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.custom-nav .nav-link  {
    border-radius: 30px;
    font-weight: bold;
    font-size: 1.1rem;
    color: #4a5568;
    padding: 10px 24px;
    transition: all 0.3s ease;
}

.custom-nav .nav-link:hover {
    color: #2b6cb0;
    background-color: #edf2f7;
}

.custom-nav .nav-link.active {
    background-color: #3182ce;
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(49, 130, 206, 0.3);
}


    /* 取消選單按鈕切換功能 */
    .custom-nav .nav-link2 {
        border-radius: 30px;
        font-weight: bold;
        font-size: 1.1rem;
        color: #4a5568;
        padding: 10px 24px;
        transition: all 0.3s ease;
    }

        .custom-nav .nav-link2:hover {
            color: #2b6cb0;
            background-color: #edf2f7;
        }

    .custom-nav .nav-link2.active {
        background-color: #3182ce;
        color: #ffffff;
        box-shadow: 0 4px 10px rgba(49, 130, 206, 0.3);
    }



/* ================= 下欄 主要內容區樣式 ================= */
.main-content-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    min-height: 400px;
}

/* 社團卡片懸浮效果 */
.club-card {
    border: none;
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.club-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}
.admin-stat-card {
    border-radius: 12px;
    border: none;
    color: #ffffff;
}