/* 整体页面样式 */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #e9f5e9; /* 淡绿色背景 */
    color: #333;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin: 20px auto;
    min-height: 80vh;
    overflow: auto; /* 确保内容可滚动 */
}

/* 标题样式 */
header {
    background-color: #2e8b57; /* 深绿色 */
    color: white;
    padding: 20px 0;
    text-align: center;
    font-size: 2em;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
}

h1 {
    margin: 0 0 20px 0;
    font-size: 2em;
    font-weight: bold;
    color: #2e8b57;
    text-align: center;
}

h2 {
    color: #3cb371;
    margin-top: 30px;
}

h3 {
    color: #3cb371;
    margin-top: 20px;
}

/* 主体内容居中 */
main {
    margin-top: 120px;
    width: 400px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center; /* 表单内容居中 */
}

/* 表单样式 */
form {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

label {
    font-size: 1.2em;
    margin-bottom: 10px;
    text-align: left; /* 表单标签左对齐 */
}

input[type="text"],
input[type="password"],
textarea,
select {
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1em;
    width: 100%;
    box-sizing: border-box;
}

/* 按钮样式 */
input[type="submit"],
.btn {
    background-color: #2e8b57; /* 深绿色 */
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s;
    display: inline-block;
    text-decoration: none;
    margin: 5px;
}

input[type="submit"]:hover,
.btn:hover {
    background-color: #3cb371; /* 浅绿色 */
}

.btn-primary {
    background-color: #2e8b57;
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-info {
    background-color: #17a2b8;
}

.btn-danger {
    background-color: #dc3545;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.875em;
}

/* 链接按钮样式 */
a {
    color: #2e8b57;
    font-size: 1em;
    text-decoration: none;
}

a:hover {
    color: #3cb371;
}

/* 提示框样式 */
.alert {
    padding: 10px;
    margin: 20px 0;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.flash {
    padding: 10px;
    margin: 20px 0;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
}

.flash.error {
    background-color: #f2dede;
    color: #a94442;
}

.flash.success {
    background-color: #dff0d8;
    color: #3c763d;
}

/* 链接容器右对齐 */
.link-container {
    text-align: right; /* 链接容器右对齐 */
}

/* 管理员界面样式 */
.admin-dashboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.admin-content {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

.admin-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 20px 0 30px 0;
}

.admin-button {
    padding: 15px 25px;
    background-color: #2e8b57;
    color: white;
    border-radius: 5px;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s ease;
    flex-basis: 150px;
}

.admin-button:hover {
    background-color: #3cb371;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    color: white;
}

.admin-button.logout {
    background-color: #dc3545;
}

.admin-info {
    margin-top: 30px;
    text-align: center;
}

.admin-actions {
    display: flex;
    justify-content: space-between;
    margin: 20px 0;
}

.admin-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.form-check-input {
    margin-right: 10px;
}

.form-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

/* 表格样式 */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.admin-table th,
.admin-table td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}

.admin-table th {
    background-color: #f2f2f2;
    font-weight: bold;
}

.admin-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.admin-table tr:hover {
    background-color: #f2f2f2;
}

.inline-form {
    display: inline;
}

.correct {
    color: #28a745;
    font-weight: bold;
    text-align: center;
}

.incorrect {
    color: #dc3545;
    font-weight: bold;
    text-align: center;
}

.result-summary {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

/* 响应式样式 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px;
    }
    
    .admin-button {
        flex-basis: 130px;
        padding: 12px 20px;
    }
    
    .admin-table {
        font-size: 0.9em;
    }
    
    h1 {
        font-size: 1.8em;
    }
}