/* style.css - 最終修正版 */
* {
    box-sizing: border-box; /* 這是排版救星，確保 padding 不會撐破寬度 */
}

body {
    font-family: "Microsoft JhengHei", Arial, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 0;
    color: #333;
    /* 注意：這裡移除了 display: flex，讓網頁回復正常的由上而下排版 */
}

/* --- 導覽列樣式 --- */
.nav-bar {
    background-color: #fff;
    padding: 15px 0;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    width: 100%;
}

.nav-bar a {
    text-decoration: none;
    color: #555;
    font-weight: bold;
    margin: 0 10px;
    font-size: 1rem;
    padding: 8px 12px;
    border-radius: 5px;
    display: inline-block; /* 確保按鈕不會擠在一起 */
    transition: all 0.2s;
}

.nav-bar a:hover {
    background-color: #e9ecef;
    color: #007bff;
}

.nav-bar a.active {
    background-color: #007bff;
    color: white;
}

/* --- 內容容器 --- */
.container {
    width: 95%; /* 手機版佔寬一點 */
    max-width: 800px; /* 電腦版最大寬度 */
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    margin: 0 auto 50px auto; /* 上下留白，左右置中 */
}

h2 {
    color: #333;
    text-align: center;
    border-bottom: 2px solid #007bff;
    padding-bottom: 15px;
    margin-top: 0;
}

/* --- 表單與卡片 --- */
.card {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 5px;
    border: 1px solid #eee;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"], 
input[type="password"], 
input[type="number"], 
input[type="date"], 
input[type="file"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    background: white;
}

/* --- 按鈕 --- */
.btn {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
    text-align: center;
}

.btn:hover {
    background-color: #0056b3;
}

/* --- 訊息提示 --- */
.success {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 5px solid #28a745;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 5px solid #dc3545;
}

/* --- 選單網格 (Dashboard用) --- */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.menu-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    text-decoration: none;
    color: #333;
    display: block;
    border: 1px solid #eee;
    transition: transform 0.2s;
}
.menu-card:hover {
    transform: translateY(-5px);
    border-color: #007bff;
}