/* static/css/style.css */
/* 基础样式重置与全局设置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f5f5f5;
  color: #333;
  padding: 0;
  margin: 0;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* 头部样式 */
header {
  background-color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #007BFF;
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 20px;
}

.nav-links a {
  text-decoration: none;
  color: #555;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #007BFF;
}

/* 响应式导航菜单按钮（移动端） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: #555;
  cursor: pointer;
}

/* 主要内容区域样式 */
main {
  padding: 30px 0;
}

.section-title {
  font-size: 28px;
  margin-bottom: 20px;
  color: #007BFF;
  text-align: center;
}

.card {
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 30px 40px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  margin-top: 6px;
  margin-bottom: 16px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  border-color: #007BFF;
  outline: none;
}

.btn {
  display: inline-block;
  padding: 12px 0;
  width: 100%;
  background-color: #007BFF;
  color: white;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn:hover,
.btn:focus {
  background-color: #0056b3;
  outline: none;
}

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

.btn-secondary:hover {
  background-color: #5a6268;
}

/* 列表样式 */
.list-group {
  list-style: none;
}

.list-group-item {
  padding: 10px 15px;
  border-bottom: 1px solid #eee;
}

.list-group-item:last-child {
  border-bottom: none;
}

/* 页脚样式 */
footer {
  background-color: #2c3e50;
  color: #fff;
  padding: 30px 0;
  margin-top: 50px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #ddd;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: #fff;
}

/* 表格样式 */
table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  margin-top: 20px;
}

th, td {
  border: 1px solid #ddd;
  padding: 12px 15px;
  text-align: left;
  font-size: 16px; /* 调大表格字体，方便阅读 */
}

th {
  background-color: #f0f4f8;
  color: #007BFF;
}

tr:nth-child(even) {
  background-color: #fafafa;
}

tr:hover {
  background-color: #f1f7ff;
}

/* 按钮样式 */
.edit-btn,
.delete-btn {
  padding: 6px 12px;
  font-size: 14px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  color: white;
  transition: background-color 0.3s ease;
}

.edit-btn {
  background-color: #28a745;
  margin-right: 8px;
  text-decoration: none;
  display: inline-block;
}

.edit-btn:hover {
  background-color: #218838;
}

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

.delete-btn:hover {
  background-color: #c82333;
}

/* 搜索框样式 */
.search-input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 16px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
}

/* 消息提示样式 */
.message {
  padding: 12px;
  background-color: #e9f7ef;
  border-left: 4px solid #28a745;
  color: #155724;
  margin-bottom: 20px;
  border-radius: 4px;
  font-weight: 600;
}

/* 链接样式 */
a {
  display: inline-block;
  margin-top: 20px;
  color: #007BFF;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover,
a:focus {
  text-decoration: underline;
  color: #0056b3;
}

/* error-message style */
.error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

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

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

/* 响应式适配（移动端） */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    flex-direction: column;
    background-color: #fff;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: left 0.3s;
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links li {
    margin: 10px 0;
  }

  .footer-content {
    flex-direction: column;
  }

  .footer-column {
    margin-bottom: 20px;
  }

  .section-title {
    font-size: 24px;
  }

  .container {
    padding: 20px;
    max-width: 95%;
  }

  table, th, td {
    font-size: 12px;
  }

  .btn {
    font-size: 14px;
  }
}