/* ==========================================================================
   七九智伴 · 校长管理台样式（零构建，原生 CSS）
   浅色主题 · 深靛蓝主色 · 适合长时间看数据
   ========================================================================== */

:root{
  --brand:#3d3a8c;
  --brand-2:#5b57c4;
  --brand-soft:#eceaf8;
  --ink:#1b1d2b;
  --ink-2:#4a4d63;
  --muted:#878ba3;
  --line:#e6e7ef;
  --line-2:#f1f2f7;
  --bg:#f6f7fb;
  --panel:#ffffff;
  --ok:#1f9d63;
  --ok-soft:#e6f6ee;
  --warn:#c47f16;
  --warn-soft:#fdf3e2;
  --danger:#d24545;
  --danger-soft:#fdecec;
  --info:#2f7ed8;
  --info-soft:#e8f1fc;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 2px rgba(27,29,43,.05), 0 6px 18px rgba(27,29,43,.05);
  --shadow-lg:0 12px 40px rgba(27,29,43,.14);
  --sidebar-w:232px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:var(--brand-2);text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:650;line-height:1.35}
button{font-family:inherit}

.boot{padding:80px;text-align:center;color:var(--muted)}

/* ---------------- 启动失败兜底提示 ---------------- */
.boot-fail{
  max-width:620px;margin:80px auto;padding:24px 26px;background:#fff;
  border:1px solid #f2c7c7;border-left:5px solid #d9534f;border-radius:var(--radius);
  box-shadow:0 8px 28px rgba(20,26,48,.06);
}
.boot-fail h2{margin:0 0 12px;font-size:17px;color:#b23c38}
.boot-fail p{margin:0 0 10px;font-size:13px;line-height:1.85;color:var(--ink-2)}
.boot-fail .mono{
  display:block;padding:10px 12px;background:var(--line-2);border-radius:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;
  color:var(--deep);word-break:break-all;
}
.boot-fail code{background:var(--line-2);border-radius:4px;padding:0 4px}

/* ---------------- 登录页 ---------------- */
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1200px 600px at 15% -10%, #e9e7fa 0%, transparent 55%),
             radial-gradient(900px 500px at 100% 110%, #e4eefb 0%, transparent 55%), var(--bg);
  padding:24px;
}
.login-card{
  width:100%;max-width:400px;background:var(--panel);border:1px solid var(--line);
  border-radius:16px;box-shadow:var(--shadow-lg);padding:34px 30px 28px;
}
.login-brand{display:flex;align-items:center;gap:10px;margin-bottom:4px}
.login-brand .logo{
  width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;letter-spacing:.5px;
}
.login-card h1{font-size:19px}
.login-card .sub{color:var(--muted);font-size:12.5px;margin:6px 0 22px}
.login-tip{
  margin-top:16px;padding:10px 12px;background:var(--line-2);border-radius:var(--radius-sm);
  color:var(--ink-2);font-size:12px;line-height:1.7;
}
.login-tip code{background:#fff;border:1px solid var(--line);border-radius:4px;padding:0 4px}
.login-tip .mono{
  display:block;margin:6px 0;padding:7px 9px;background:#fff;border:1px solid var(--line);
  border-radius:5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;
}
.probe-ok{background:#eaf7ee;border:1px solid #c4e6d0;color:#1f7a3d}
.probe-bad{background:#fdf0ef;border:1px solid #f2c7c7;color:#b23c38}

/* ---------------- 表单 ---------------- */
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--ink-2);margin-bottom:6px;font-weight:600}
input,select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;color:var(--ink);font-size:13.5px;font-family:inherit;outline:none;
  transition:border-color .15s, box-shadow .15s;
}
input:focus,select:focus,textarea:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px var(--brand-soft)}
textarea{resize:vertical;min-height:76px;line-height:1.7}
input[readonly]{background:var(--line-2);color:var(--ink-2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 14px;border:1px solid var(--line);background:#fff;color:var(--ink);
  border-radius:var(--radius-sm);font-size:13.5px;cursor:pointer;font-weight:600;
  transition:background .15s,border-color .15s,opacity .15s;white-space:nowrap;
}
.btn:hover{background:var(--line-2)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2)}
.btn-danger{background:#fff;border-color:#f0c9c9;color:var(--danger)}
.btn-danger:hover{background:var(--danger-soft)}
.btn-sm{padding:5px 10px;font-size:12.5px}
.btn-block{width:100%}
.btn-link{background:none;border:none;color:var(--brand-2);padding:2px 4px;text-decoration:underline;font-weight:600}

/* ---------------- 布局 ---------------- */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar-w);flex:0 0 var(--sidebar-w);background:#221f4d;color:#c9c7e4;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.sb-brand{display:flex;align-items:center;gap:10px;padding:18px 18px 14px;border-bottom:1px solid rgba(255,255,255,.08)}
.sb-brand .logo{
  width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#6f6ae0,#9a95ff);
  color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px;
}
.sb-brand b{color:#fff;font-size:14.5px;letter-spacing:.3px}
.sb-brand span{display:block;font-size:11px;color:#8f8bc0;letter-spacing:.4px}
.sb-nav{flex:1;overflow:auto;padding:12px 10px 20px}
.sb-group{font-size:10.5px;color:#7975b0;letter-spacing:.12em;padding:12px 10px 6px;font-weight:700}
.sb-item{
  display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;cursor:pointer;
  color:#c9c7e4;font-size:13.5px;margin-bottom:2px;user-select:none;border:1px solid transparent;
}
.sb-item:hover{background:rgba(255,255,255,.07);color:#fff}
.sb-item.active{background:rgba(255,255,255,.13);color:#fff;border-color:rgba(255,255,255,.12);font-weight:600}
.sb-item .ic{width:17px;text-align:center;font-size:14px;opacity:.9}
.sb-item .badge-n{margin-left:auto;background:#e05a5a;color:#fff;border-radius:9px;font-size:10.5px;padding:0 6px;line-height:16px;font-weight:700}
.sb-foot{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08);font-size:11.5px;color:#8f8bc0}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  height:58px;flex:0 0 58px;background:var(--panel);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:14px;padding:0 22px;position:sticky;top:0;z-index:20;
}
.topbar h2{font-size:16px;flex:1}
.topbar .who{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--ink-2)}
.avatar{
  width:29px;height:29px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;font-weight:700;font-size:12.5px;
}
.campus-pick{
  padding:5px 9px;border:1px solid var(--line);border-radius:7px;background:#fff;
  font-size:12.5px;color:var(--ink-2);cursor:pointer;font-weight:600;
}
.content{padding:20px 22px 48px;max-width:1440px;width:100%}

/* ---------------- 卡片 / 网格 ---------------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px}
.card-h{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line-2)}
.card-h h3{font-size:14.5px;flex:1}
.card-h .hint{font-size:12px;color:var(--muted);font-weight:400}
.card-b{padding:16px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g-2-1{grid-template-columns:2fr 1fr}
.g-1-2{grid-template-columns:1fr 2fr}
@media (max-width:1100px){.g3,.g4,.g-2-1,.g-1-2{grid-template-columns:1fr}.g2{grid-template-columns:1fr}}

/* KPI 卡 */
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:15px 16px;box-shadow:var(--shadow)}
.kpi .k-t{font-size:12px;color:var(--muted);margin-bottom:7px;display:flex;align-items:center;gap:5px}
.kpi .k-v{font-size:25px;font-weight:700;letter-spacing:-.5px;line-height:1.2}
.kpi .k-s{font-size:11.5px;color:var(--muted);margin-top:5px}
.kpi.good .k-v{color:var(--ok)}
.kpi.bad .k-v{color:var(--danger)}
.kpi.warn .k-v{color:var(--warn)}

/* ---------------- 表格 ---------------- */
.tbl-wrap{overflow:auto;border-radius:var(--radius-sm)}
table{width:100%;border-collapse:collapse;font-size:13px}
thead th{
  text-align:left;font-size:11.5px;color:var(--muted);font-weight:700;letter-spacing:.03em;
  padding:9px 12px;background:var(--line-2);border-bottom:1px solid var(--line);white-space:nowrap;
}
tbody td{padding:10px 12px;border-bottom:1px solid var(--line-2);vertical-align:middle}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fafbff}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.empty{padding:34px;text-align:center;color:var(--muted);font-size:13px}

/* 进度条 */
.bar{height:7px;border-radius:5px;background:var(--line);overflow:hidden;min-width:70px}
.bar > i{display:block;height:100%;border-radius:5px;background:var(--brand-2)}
.bar.ok > i{background:var(--ok)}
.bar.warn > i{background:var(--warn)}
.bar.bad > i{background:var(--danger)}

/* 标签 */
.tag{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:20px;font-size:11.5px;font-weight:600;white-space:nowrap}
.tag.gray{background:var(--line-2);color:var(--ink-2)}
.tag.ok{background:var(--ok-soft);color:var(--ok)}
.tag.warn{background:var(--warn-soft);color:var(--warn)}
.tag.danger{background:var(--danger-soft);color:var(--danger)}
.tag.info{background:var(--info-soft);color:var(--info)}
.tag.brand{background:var(--brand-soft);color:var(--brand)}

/* 区块标题 */
.sec-t{font-size:13px;font-weight:700;color:var(--ink-2);margin:0 0 10px;display:flex;align-items:center;gap:7px}
.sec-t::before{content:"";width:3px;height:13px;border-radius:2px;background:var(--brand-2)}

/* 动作清单 */
.act{display:flex;align-items:flex-start;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line)}
.act:last-child{border-bottom:none}
.act input[type=checkbox]{width:16px;height:16px;margin-top:2px;flex:0 0 16px;accent-color:var(--brand-2);cursor:pointer}
.act .a-b{flex:1;min-width:0}
.act .a-t{font-size:13.5px;font-weight:600}
.act .a-d{font-size:12px;color:var(--muted)}
.act.done .a-t{text-decoration:line-through;color:var(--muted)}
.act.done .a-d{color:#b6b9cc}

/* 快捷入口 */
.qe{display:flex;flex-wrap:wrap;gap:9px}
.qe a,.qe span{
  padding:7px 12px;border:1px solid var(--line);border-radius:20px;font-size:12.5px;
  background:#fff;cursor:pointer;color:var(--ink-2);font-weight:600;
}
.qe a:hover,.qe span:hover{border-color:var(--brand-2);color:var(--brand)}

/* 分栏工具条 */
.toolbar{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:13px}
.toolbar .sp{flex:1}
.toolbar input,.toolbar select{width:auto;min-width:130px;padding:7px 10px;font-size:13px}

/* 模态 */
.modal-mask{position:fixed;inset:0;background:rgba(24,25,39,.42);display:grid;place-items:center;z-index:100;padding:20px}
.modal{
  background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);width:100%;max-width:560px;
  max-height:88vh;display:flex;flex-direction:column;overflow:hidden;
}
.modal.wide{max-width:820px}
.modal-h{padding:15px 18px;border-bottom:1px solid var(--line-2);display:flex;align-items:center}
.modal-h h3{font-size:15px;flex:1}
.modal-h .x{cursor:pointer;color:var(--muted);font-size:19px;line-height:1;padding:0 4px}
.modal-b{padding:18px;overflow:auto}
.modal-f{padding:13px 18px;border-top:1px solid var(--line-2);display:flex;justify-content:flex-end;gap:9px;background:#fcfcfe}

/* Toast */
.toast-root{position:fixed;top:16px;right:16px;z-index:200;display:flex;flex-direction:column;gap:8px}
.toast{
  background:#23253e;color:#fff;padding:10px 15px;border-radius:9px;font-size:13px;
  box-shadow:var(--shadow-lg);max-width:330px;animation:tin .18s ease-out;
}
.toast.ok{background:#1f7a53}
.toast.err{background:#b93b3b}
@keyframes tin{from{opacity:0;transform:translateY(-7px)}to{opacity:1;transform:none}}

/* 提示条 */
.note{padding:10px 12px;border-radius:var(--radius-sm);font-size:12.5px;line-height:1.75;background:var(--line-2);color:var(--ink-2)}
.note.info{background:var(--info-soft);color:#1d5fa8}
.note.warn{background:var(--warn-soft);color:#8a5a10}
.note.danger{background:var(--danger-soft);color:#9c3030}

/* 其他 */
.muted{color:var(--muted)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.stack{display:flex;flex-direction:column;gap:10px}
.hr{height:1px;background:var(--line-2);margin:14px 0}
.mini{font-size:12px;color:var(--muted)}
.spark{display:flex;align-items:flex-end;gap:3px;height:40px}
.spark i{flex:1;background:var(--brand-soft);border-radius:3px 3px 0 0;min-height:3px}
.spark i.hl{background:var(--brand-2)}
.loading{padding:40px;text-align:center;color:var(--muted);font-size:13px}

/* ---------------- 教务页：班级与花名册 ---------------- */
.two-col{display:grid;grid-template-columns:300px 1fr;gap:16px;align-items:start}
@media (max-width:1000px){.two-col{grid-template-columns:1fr}}
.cls-list{max-height:calc(100vh - 260px);overflow:auto}
.cls-item{
  padding:12px;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;
  cursor:pointer;transition:border-color .15s,background .15s;
}
.cls-item:hover{background:var(--line-2)}
.cls-item.is-on{border-color:var(--brand-2);background:var(--brand-soft)}