/* ============ 会东中学学情管理系统 样式 ============ */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --red: #dc2626;
  --red-bg: #fee2e2;
  --yellow: #d97706;
  --yellow-bg: #fef3c7;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --purple: #7c3aed;
  --sidebar-bg: #0f172a;
  --sidebar-text: #cbd5e1;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}

/* ============ 登录页 ============ */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
  padding: 20px;
}
.login-box {
  background: #fff; border-radius: 16px; padding: 40px; width: 400px; max-width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo { font-size: 48px; margin-bottom: 8px; }
.login-header h1 { font-size: 20px; margin-bottom: 6px; }
.login-header p { color: var(--text-3); font-size: 13px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 13px; color: var(--text-2); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none; transition: border-color .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); }
.login-error { background: var(--red-bg); color: var(--red); padding: 8px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }
.login-demo { margin-top: 24px; border-top: 1px solid var(--border); padding-top: 16px; }
.demo-title { font-size: 12px; color: var(--text-3); margin-bottom: 8px; text-align: center; }
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.demo-account {
  padding: 8px; border: 1px solid var(--border); background: #f8fafc; border-radius: 8px;
  cursor: pointer; font-size: 12px; transition: all .15s;
}
.demo-account:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ============ 布局 ============ */
.app { display: flex; height: 100vh; overflow: hidden; }
.sidebar {
  width: 220px; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; flex-shrink: 0;
}
.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 18px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand-icon { font-size: 28px; }
.brand-title { font-weight: 700; color: #fff; font-size: 15px; }
.brand-sub { font-size: 11px; color: var(--text-3); }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 10px 8px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
  cursor: pointer; color: var(--sidebar-text); margin-bottom: 2px; font-size: 13.5px;
  transition: all .15s; border: none; background: none; width: 100%; text-align: left;
}
.nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }
.nav-icon { width: 20px; text-align: center; font-size: 16px; }
/* 导航分组 */
.nav-group { margin-top: 6px; }
.nav-group-title {
  display: flex; align-items: center; justify-content: space-between; width: 100%;
  padding: 7px 12px; border: none; background: none; cursor: pointer;
  color: var(--text-3); font-size: 11px; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase; border-radius: 6px;
}
.nav-group-title:hover { color: #e2e8f0; }
.nav-group-arrow { font-size: 10px; transition: transform .2s; }
.nav-group.collapsed .nav-group-arrow { transform: rotate(-90deg); }
.nav-group.collapsed .nav-group-items { display: none; }
.nav-group-items .nav-item { padding-left: 20px; }
/* 用户表单：任教班级复选框 */
.class-check-box { max-height: 220px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; padding: 8px; }
.class-check-group { margin-bottom: 6px; }
.class-check-grade { font-size: 11px; font-weight: 600; color: var(--text-3); margin: 4px 2px; letter-spacing: .5px; }
.class-check-items { display: flex; flex-wrap: wrap; gap: 4px; }
.class-check {
  display: inline-flex; align-items: center; gap: 4px; cursor: pointer;
  font-size: 12.5px; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--bg); user-select: none;
}
.class-check:hover { border-color: var(--primary); }
.class-check input { accent-color: var(--primary); margin: 0; }
.sidebar-footer { padding: 12px; border-top: 1px solid rgba(255,255,255,.08); }
.user-chip { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.user-avatar {
  width: 36px; height: 36px; border-radius: 50%; background: var(--primary);
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 14px;
}
.user-name { color: #fff; font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text-3); }

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  height: 56px; background: var(--surface); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px; flex-shrink: 0;
}
.topbar h2 { font-size: 17px; }
.date-display { color: var(--text-3); font-size: 13px; }
.content { flex: 1; overflow-y: auto; padding: 24px; }

/* ============ 通用组件 ============ */
.card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin-bottom: 20px;
}
.card-title { font-size: 15px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; }
.btn {
  padding: 8px 16px; border: none; border-radius: 8px; cursor: pointer; font-size: 13px;
  transition: all .15s; display: inline-flex; align-items: center; gap: 6px; font-weight: 500;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--green); color: #fff; }
.btn-ghost { background: transparent; color: var(--text-2); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.toolbar select, .toolbar input {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; outline: none; background: #fff;
}
.toolbar input:focus, .toolbar select:focus { border-color: var(--primary); }

/* 表格 */
.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; background: #fff; }
th {
  background: #f8fafc; padding: 10px 8px; text-align: center; font-weight: 600;
  border-bottom: 1px solid var(--border); white-space: nowrap; color: var(--text-2); position: sticky; top: 0;
}
td { padding: 8px; text-align: center; border-bottom: 1px solid #f1f5f9; white-space: nowrap; }
tr:hover td { background: #f8fafc; }
.table-scroll { max-height: 60vh; overflow-y: auto; }

/* 预警徽章 */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.badge-red { background: var(--red-bg); color: var(--red); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow); }
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-purple { background: #ede9fe; color: var(--purple); }
.tag-up { color: var(--green); font-weight: 600; }
.tag-down { color: var(--red); font-weight: 600; }

/* 统计卡片 */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--surface); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.stat-card .stat-label { font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
.stat-card .stat-value { font-size: 26px; font-weight: 700; }
.stat-card .stat-sub { font-size: 11px; color: var(--text-3); margin-top: 4px; }
.stat-red .stat-value { color: var(--red); }
.stat-yellow .stat-value { color: var(--yellow); }
.stat-green .stat-value { color: var(--green); }
.stat-blue .stat-value { color: var(--primary); }

/* 图表容器 */
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.chart-box { height: 320px; position: relative; }
@media (max-width: 1100px) { .chart-grid { grid-template-columns: 1fr; } }

/* 模态框 */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: #fff; border-radius: 14px; width: 640px; max-width: 100%; max-height: 88vh;
  display: flex; flex-direction: column; box-shadow: var(--shadow-lg);
}
.modal-lg { width: 900px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 16px; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-3); }
.modal-body { padding: 22px; overflow-y: auto; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 200; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: #0f172a; color: #fff; padding: 12px 18px; border-radius: 10px;
  box-shadow: var(--shadow-lg); font-size: 13px; animation: slideIn .25s; min-width: 240px;
}
.toast-success { background: var(--green); }
.toast-error { background: var(--red); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: none; opacity: 1; } }

/* 表单 */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* 上传区 */
.upload-zone {
  border: 2px dashed var(--border); border-radius: 12px; padding: 36px; text-align: center;
  cursor: pointer; transition: all .15s; background: #fafbfc;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone .upload-icon { font-size: 40px; margin-bottom: 10px; }
.upload-zone .upload-text { color: var(--text-2); }
.upload-zone .upload-hint { color: var(--text-3); font-size: 12px; margin-top: 6px; }

/* 分层标记 */
.strat { padding: 2px 8px; border-radius: 6px; font-size: 11px; font-weight: 600; }
.strat-peiyou { background: #ede9fe; color: var(--purple); }
.strat-linjie { background: var(--yellow-bg); color: var(--yellow); }
.strat-xuekun { background: var(--red-bg); color: var(--red); }

/* 学生画像 */
.profile-header { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.profile-avatar {
  width: 64px; height: 64px; border-radius: 50%; background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 700;
}
.profile-info h3 { font-size: 18px; margin-bottom: 4px; }
.profile-meta { display: flex; gap: 14px; color: var(--text-2); font-size: 13px; flex-wrap: wrap; }

/* 空状态 */
.empty { text-align: center; padding: 50px 20px; color: var(--text-3); }
.empty .empty-icon { font-size: 44px; margin-bottom: 10px; }

/* 进度条 */
.progress-bar { height: 6px; background: #e2e8f0; border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 999px; }

/* 分页 */
.pager { display: flex; gap: 6px; justify-content: center; margin-top: 16px; align-items: center; }
.pager button { padding: 6px 12px; border: 1px solid var(--border); background: #fff; border-radius: 6px; cursor: pointer; }
.pager button.cur { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 系数设置 */
.coef-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.coef-item { text-align: center; }
.coef-item .coef-label { font-size: 12px; color: var(--text-2); margin-bottom: 6px; }
.coef-item input { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; text-align: center; font-size: 16px; font-weight: 700; }
.coef-formula { background: #f8fafc; border-radius: 8px; padding: 14px; margin-top: 16px; font-size: 13px; color: var(--text-2); text-align: center; }
.coef-formula b { color: var(--primary); }

/* 班级类别选择 */
.class-cat { display: inline-block; }

/* 趋势迷你条 */
.mini-trend { display: inline-flex; gap: 2px; align-items: flex-end; height: 18px; }
.mini-trend span { width: 5px; background: var(--primary-light); border-radius: 2px; }

@media (max-width: 800px) {
  .sidebar { display: none; }
  .coef-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
}