/* 班级云助手 - 通用样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #f0f4f8; color: #2c3e50; font-size: 14px;
}
a { color: #1890ff; text-decoration: none; }

/* 登录页 */
.login-body {
  display: flex; justify-content: center; align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-box {
  background: #fff; padding: 40px 36px; border-radius: 16px;
  width: 360px; box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.login-box h1 { text-align: center; color: #4a5fd0; font-size: 24px; }
.login-box .subtitle { text-align: center; color: #888; margin: 6px 0 24px; }
.login-box input {
  width: 100%; padding: 11px 14px; margin-bottom: 14px;
  border: 1px solid #d9d9d9; border-radius: 8px; font-size: 14px;
}
.login-box input:focus { outline: none; border-color: #4a5fd0; }
.login-box .btn { width: 100%; }
.login-box .tip { color: #e74c3c; text-align: center; margin-top: 10px; min-height: 20px; }
.demo-info { margin-top: 20px; padding: 12px; background: #f7f9fc; border-radius: 8px; color: #666; font-size: 12px; line-height: 1.8; }

/* 顶部栏 */
.topbar {
  background: #fff; padding: 12px 24px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0,0,0,.08); position: sticky; top: 0; z-index: 10;
}
.topbar strong { color: #4a5fd0; font-size: 17px; }

/* Tab */
.tabs {
  background: #fff; padding: 0 24px; display: flex;
  border-bottom: 1px solid #e8ecf0;
}
.tab {
  padding: 13px 22px; border: none; background: none; font-size: 14px;
  color: #666; cursor: pointer; border-bottom: 2px solid transparent;
}
.tab.active { color: #4a5fd0; font-weight: 600; border-bottom-color: #4a5fd0; }

/* 容器 */
.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }
.panel { display: none; }
.panel.active { display: block; }
.card {
  background: #fff; border-radius: 12px; padding: 20px;
  margin-bottom: 16px; box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.card h3 { margin-bottom: 14px; color: #333; font-size: 15px; }

/* 表单 */
textarea, select, input[type="text"], input[type="date"], input[type="number"] {
  width: 100%; padding: 10px 12px; border: 1px solid #d9d9d9;
  border-radius: 8px; font-size: 14px; font-family: inherit; margin-bottom: 10px;
}
textarea:focus, select:focus, input:focus { outline: none; border-color: #4a5fd0; }
.row { display: flex; gap: 12px; }
.row label { flex: 1; font-size: 13px; color: #666; }
.row label input { margin-top: 4px; }

/* 按钮 */
.btn {
  display: inline-block; padding: 10px 22px; border: none; border-radius: 8px;
  font-size: 14px; cursor: pointer; transition: opacity .15s;
}
.btn.primary { background: #4a5fd0; color: #fff; }
.btn.primary:hover { opacity: .88; }
.btn.small { padding: 6px 14px; font-size: 13px; background: #f0f4f8; color: #333; border: 1px solid #d9d9d9; }
.btn.mini { padding: 5px 12px; font-size: 12px; border-radius: 6px; margin-right: 8px; }
.btn.approve { background: #52c41a; color: #fff; }
.btn.reject { background: #ff4d4f; color: #fff; }
.btn.gray { background: #f0f4f8; color: #555; border: 1px solid #d9d9d9; }

/* 列表 */
.list { list-style: none; }
.list li {
  padding: 12px 4px; border-bottom: 1px solid #f0f0f0; line-height: 1.7;
}
.list li:last-child { border-bottom: none; }
.meta { color: #999; font-size: 12px; margin-top: 4px; }
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; margin-left: 8px;
}
.badge.approved { background: #f6ffed; color: #52c41a; border: 1px solid #b7eb8f; }
.badge.pending { background: #fffbe6; color: #faad14; border: 1px solid #ffe58f; }
.badge.rejected { background: #fff2f0; color: #ff4d4f; border: 1px solid #ffccc7; }

/* 表格 */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; border-bottom: 1px solid #f0f0f0; text-align: left; }
th { background: #fafbfc; color: #666; font-weight: 600; }

.tip { color: #e74c3c; font-size: 13px; min-height: 18px; margin-top: 6px; }
.tip.ok { color: #52c41a; }
.empty { color: #bbb; text-align: center; padding: 24px 0; }

/* 成绩录入 */
.card h4 { margin-bottom: 10px; color: #444; font-size: 14px; }
#gradeInputTable input[type="number"] { margin: 0; padding: 8px; }
.rank { display: block; color: #999; font-size: 12px; margin-top: 2px; }

/* 审核卡片 */
.audit-item {
  border: 1px solid #f0f0f0; border-radius: 10px; padding: 14px; margin-bottom: 12px;
  background: #fafbfc;
}
.audit-item .content { font-size: 15px; margin: 8px 0; }
.audit-actions { margin-top: 8px; }