/* ============================================================
   3D数字班级 · 智慧管理平台 — 原型样式
   Light theme / education product
   ============================================================ */

:root{
  --bg:#e9eef7;
  --surface:#ffffff;
  --surface-2:#f6f8fc;
  --surface-3:#eef3fb;
  --line:#e2e8f3;
  --line-strong:#d2dbea;
  --text:#17203a;
  --text-2:#41506e;
  --muted:#7b89a3;
  --primary:#2f6bff;
  --primary-2:#5b8cff;
  --primary-soft:#ebf1ff;
  --green:#22b573;
  --green-soft:#e8f8f0;
  --amber:#f5a524;
  --amber-soft:#fef4e3;
  --red:#f04a4a;
  --red-soft:#fdecec;
  --purple:#8a5cf6;
  --purple-soft:#f1ecfe;
  --cyan:#12b5c9;
  --slate:#7b89a3;
  --shadow-1:0 1px 2px rgba(23,32,58,.06), 0 2px 8px rgba(23,32,58,.05);
  --shadow-2:0 6px 24px rgba(23,32,58,.10), 0 2px 6px rgba(23,32,58,.06);
  --shadow-3:-8px 0 40px rgba(23,32,58,.14);
  --r-s:8px; --r-m:12px; --r-l:16px;
  --topbar-h:56px;
  --status-h:30px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  font-size:13px;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button{font-family:inherit;font-size:inherit;color:inherit;cursor:pointer;border:0;background:none}
.hidden{display:none !important}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#c9d4e6;border-radius:6px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#aebdd4;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

#app{
  height:100%;
  display:grid;
  grid-template-rows:var(--topbar-h) 1fr var(--status-h);
}

/* ================= 顶栏 ================= */
.topbar{
  display:flex;align-items:center;gap:18px;
  padding:0 14px;
  background:linear-gradient(180deg,#ffffff,#fbfcff);
  border-bottom:1px solid var(--line);
  z-index:30;
  position:relative;
}
.brand{display:flex;align-items:center;gap:10px;min-width:220px}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,#3d77ff,#7b5cff);
  box-shadow:0 3px 10px rgba(61,119,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:14px;letter-spacing:.2px}
.brand-text span{font-size:11px;color:var(--muted)}

.topbar-context{display:flex;align-items:center;gap:8px;flex:1;overflow:hidden}
.ctx-chip{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;border-radius:13px;
  background:var(--surface-3);color:var(--text-2);
  font-size:12px;white-space:nowrap;
}
.ctx-chip.ctx-warn{background:var(--amber-soft);color:#a86a00}

.topbar-actions{display:flex;align-items:center;gap:8px}
.seg{display:flex;background:var(--surface-3);border-radius:10px;padding:3px;gap:2px}
.seg-btn{
  height:26px;padding:0 12px;border-radius:8px;font-size:12px;color:var(--text-2);
  transition:.16s;
}
.seg-btn:hover{color:var(--text)}
.seg-btn.is-active{background:#fff;color:var(--primary);box-shadow:var(--shadow-1);font-weight:600}
.icon-btn{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:var(--surface-3);color:var(--text-2);transition:.16s;
}
.icon-btn:hover{background:var(--primary-soft);color:var(--primary)}

/* ================= 主体 ================= */
.body{display:flex;min-height:0;position:relative;overflow:hidden}

/* 左侧导航 */
.rail{
  width:104px;flex:0 0 104px;
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:10px 8px;
  overflow-y:auto;z-index:10;
}
.rail-group-title{
  font-size:10px;color:var(--muted);letter-spacing:.14em;
  padding:4px 8px 6px;text-transform:uppercase;
}
.rail-item{
  width:100%;display:flex;flex-direction:column;align-items:center;gap:5px;
  padding:8px 4px 9px;border-radius:var(--r-m);margin-bottom:3px;
  color:var(--text-2);transition:.16s;position:relative;
}
.rail-item:hover{background:var(--surface-3)}
.rail-item.is-active{background:var(--primary-soft);color:var(--primary);font-weight:600}
.rail-ic{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  font-size:12px;font-weight:700;color:#fff;
}
.ic-plum{background:linear-gradient(135deg,#f0709b,#e0557f)}
.ic-blue{background:linear-gradient(135deg,#5b8cff,#2f6bff)}
.ic-green{background:linear-gradient(135deg,#4fd08a,#22b573)}
.ic-amber{background:linear-gradient(135deg,#ffc257,#f5a524)}
.ic-cyan{background:linear-gradient(135deg,#4ad2e2,#12b5c9)}
.ic-purple{background:linear-gradient(135deg,#a98bff,#8a5cf6)}
.ic-slate{background:linear-gradient(135deg,#a5b2c8,#7b89a3)}
.ic-red{background:linear-gradient(135deg,#ff7d7d,#f04a4a)}
.ic-indigo{background:linear-gradient(135deg,#6d8cff,#4a5cff)}
.rail-lb{font-size:11px;line-height:1.2;text-align:center}
.rail-badge{
  position:absolute;top:5px;right:9px;font-style:normal;font-size:9px;font-weight:700;
  background:var(--red);color:#fff;border-radius:8px;padding:1px 5px;line-height:1.4;
}

/* 舞台 */
.stage{flex:1;position:relative;min-width:0;background:#dfe6f2;overflow:hidden}
#scene3d{position:absolute;inset:0}
#scene3d canvas{display:block}

.view-tools{
  position:absolute;top:12px;right:12px;display:flex;flex-direction:column;gap:6px;z-index:6;
}
.vt-btn{
  display:flex;align-items:center;gap:6px;height:30px;padding:0 11px;border-radius:9px;
  background:rgba(255,255,255,.94);backdrop-filter:blur(8px);
  border:1px solid var(--line);color:var(--text-2);font-size:12px;
  box-shadow:var(--shadow-1);transition:.16s;white-space:nowrap;
}
.vt-btn:hover{border-color:var(--primary-2);color:var(--primary)}
.vt-btn.is-on{background:var(--primary);border-color:var(--primary);color:#fff}
.vt-btn.is-on:hover{color:#fff}

.legend{
  position:absolute;left:12px;top:12px;z-index:6;
  background:rgba(255,255,255,.94);backdrop-filter:blur(8px);
  border:1px solid var(--line);border-radius:var(--r-m);
  padding:9px 11px;box-shadow:var(--shadow-1);max-width:250px;
}
.lg-title{font-size:10.5px;color:var(--muted);margin-bottom:6px;line-height:1.4}
.lg-row{display:inline-flex;align-items:center;gap:5px;font-size:11px;color:var(--text-2);margin:2px 10px 2px 0}
.lg-dot{width:8px;height:8px;border-radius:50%;display:inline-block}

.hint-bar{
  position:absolute;left:50%;transform:translateX(-50%);bottom:12px;z-index:5;
  background:rgba(23,32,58,.78);color:#fff;font-size:11.5px;
  padding:7px 16px;border-radius:16px;backdrop-filter:blur(6px);
  transition:opacity .4s;pointer-events:none;white-space:nowrap;
}
.hint-bar.fade{opacity:0}

/* 二维快速模式 */
.seat2d{
  position:absolute;inset:0;overflow:auto;padding:20px 20px 60px;
  background:linear-gradient(180deg,#f3f6fc,#eaeff8);
}
.s2d-head{display:flex;justify-content:center;margin-bottom:16px}
.s2d-board{
  background:linear-gradient(180deg,#2f3a52,#242c3e);color:#e8eefc;
  padding:9px 40px;border-radius:10px;font-size:12.5px;letter-spacing:.18em;
  box-shadow:0 6px 18px rgba(23,32,58,.2);
}
.s2d-grid{
  display:grid;gap:12px;justify-content:center;
  grid-template-columns:repeat(6,minmax(120px,132px));
}
.s2d-col{display:flex;flex-direction:column;gap:8px}
.s2d-col-title{
  text-align:center;font-size:11px;font-weight:700;padding:4px 0 6px;border-radius:8px 8px 0 0;
}
.s2d-cell{
  background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:8px 9px;display:flex;align-items:center;gap:8px;
  cursor:pointer;transition:.15s;position:relative;box-shadow:var(--shadow-1);
}
.s2d-cell:hover{border-color:var(--primary-2);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.s2d-cell.is-leave{background:#f4f6fa;opacity:.78}
.s2d-av{
  width:26px;height:26px;border-radius:9px;flex:0 0 26px;display:grid;place-items:center;
  font-size:11px;font-weight:700;color:#fff;position:relative;
}
.s2d-av::after{
  content:"";position:absolute;right:-2px;bottom:-2px;width:9px;height:9px;border-radius:50%;
  border:2px solid #fff;
}
.s2d-name{font-size:12px;font-weight:600;line-height:1.25}
.s2d-meta{font-size:10px;color:var(--muted);line-height:1.35}
.s2d-task{
  position:absolute;top:6px;right:6px;width:6px;height:6px;border-radius:50%;background:#ff7a45;
}
.s2d-foot{
  max-width:820px;margin:20px auto 0;font-size:11.5px;color:var(--muted);
  text-align:center;line-height:1.7;
}

/* ================= 抽屉 ================= */
.drawer{
  position:absolute;top:0;right:0;bottom:0;width:472px;max-width:92vw;
  background:var(--surface);border-left:1px solid var(--line);
  box-shadow:var(--shadow-3);
  display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  z-index:40;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:13px 14px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#fbfcff,#f6f9fe);
}
.dh-left{display:flex;align-items:center;gap:11px;min-width:0}
.dh-icon{
  width:37px;height:37px;border-radius:11px;flex:0 0 37px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,#5b8cff,#2f6bff);
}
.dh-title{font-size:14px;font-weight:700;line-height:1.3}
.dh-sub{font-size:11.5px;color:var(--muted);line-height:1.4}
.dh-close{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;color:var(--muted);
  transition:.16s;flex:0 0 30px;
}
.dh-close:hover{background:var(--surface-3);color:var(--text)}

.drawer-tabs{
  display:flex;flex-wrap:wrap;gap:2px 2px;padding:8px 10px 0;border-bottom:1px solid var(--line);
  background:var(--surface);flex:0 0 auto;
}
.drawer-tabs::-webkit-scrollbar{height:0}
.d-tab{
  padding:6px 9px 8px;font-size:11.5px;color:var(--muted);border-bottom:2px solid transparent;
  white-space:nowrap;transition:.15s;border-radius:6px 6px 0 0;
}
.d-tab:hover{color:var(--text);background:var(--surface-3)}
.d-tab.is-active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}

.drawer-body{flex:1;overflow-y:auto;padding:14px;background:var(--surface-2)}

/* ================= 通用组件 ================= */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  padding:12px 13px;margin-bottom:10px;box-shadow:var(--shadow-1);
}
.card.flat{box-shadow:none}
.card-head{
  display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px;
}
.card-title{font-size:12.5px;font-weight:700;display:flex;align-items:center;gap:7px}
.card-title::before{
  content:"";width:3px;height:13px;border-radius:2px;background:var(--primary);display:inline-block;
}
.card-title.t-green::before{background:var(--green)}
.card-title.t-amber::before{background:var(--amber)}
.card-title.t-purple::before{background:var(--purple)}
.card-title.t-red::before{background:var(--red)}
.card-hint{font-size:11px;color:var(--muted)}

.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.kpi{
  background:var(--surface-3);border-radius:10px;padding:9px 10px;text-align:center;
}
.kpi b{display:block;font-size:19px;line-height:1.25;letter-spacing:-.4px}
.kpi span{font-size:10.5px;color:var(--muted)}
.kpi.k-green b{color:var(--green)}
.kpi.k-amber b{color:var(--amber)}
.kpi.k-red b{color:var(--red)}
.kpi.k-blue b{color:var(--primary)}

.rows{display:flex;flex-direction:column;gap:7px}
.row{
  display:flex;align-items:flex-start;justify-content:space-between;gap:10px;
  font-size:12px;line-height:1.5;
}
.row .rk{color:var(--muted);flex:0 0 auto;min-width:60px}
.row .rv{text-align:right;color:var(--text);flex:1}

.bar-line{display:flex;align-items:center;gap:8px;font-size:11.5px;line-height:1.6}
.bar-line .bl-name{flex:0 0 96px;color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar-track{flex:1;height:7px;border-radius:4px;background:var(--surface-3);overflow:hidden}
.bar-fill{height:100%;border-radius:4px;transition:width .5s ease}
.bar-line .bl-val{flex:0 0 38px;text-align:right;font-variant-numeric:tabular-nums;color:var(--muted);font-size:11px}

.tag{
  display:inline-flex;align-items:center;gap:4px;height:20px;padding:0 7px;border-radius:6px;
  font-size:10.5px;font-weight:600;background:var(--surface-3);color:var(--text-2);white-space:nowrap;
}
.tag.t-blue{background:var(--primary-soft);color:#2456c9}
.tag.t-green{background:var(--green-soft);color:#128a55}
.tag.t-amber{background:var(--amber-soft);color:#a86a00}
.tag.t-red{background:var(--red-soft);color:#c62f2f}
.tag.t-purple{background:var(--purple-soft);color:#6a3fd0}
.tag.t-slate{background:#eef1f6;color:#66748f}

.mini-list{display:flex;flex-direction:column;gap:6px}
.mini{
  display:flex;align-items:center;gap:9px;padding:8px 9px;border-radius:9px;
  background:var(--surface-2);border:1px solid var(--line);
}
.mini.clickable{cursor:pointer;transition:.15s}
.mini.clickable:hover{border-color:var(--primary-2);background:#fbfdff;transform:translateX(2px)}
.mini-ic{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;display:grid;place-items:center;
  font-size:11px;font-weight:700;color:#fff;
}
.mini-main{flex:1;min-width:0}
.mini-t{font-size:12px;font-weight:600;line-height:1.35}
.mini-s{font-size:10.5px;color:var(--muted);line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mini-r{flex:0 0 auto;text-align:right}

.callout{
  border-radius:10px;padding:9px 11px;font-size:11.5px;line-height:1.65;
  background:var(--primary-soft);color:#20428f;border-left:3px solid var(--primary);
}
.callout.c-amber{background:var(--amber-soft);color:#8a5a00;border-left-color:var(--amber)}
.callout.c-green{background:var(--green-soft);color:#0f6d45;border-left-color:var(--green)}
.callout.c-red{background:var(--red-soft);color:#a53030;border-left-color:var(--red)}
.callout.c-slate{background:#eef1f6;color:#556480;border-left-color:var(--slate)}
.callout b{font-weight:700}

.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{
  padding:5px 10px;border-radius:14px;font-size:11.5px;background:var(--surface);
  border:1px solid var(--line);color:var(--text-2);transition:.15s;
}
.chip:hover{border-color:var(--primary-2);color:var(--primary);background:var(--primary-soft)}
.chip.ask{background:var(--primary-soft);border-color:#c9d9ff;color:#2456c9;font-weight:600}

/* Agent 对话 */
.agent-box{
  background:linear-gradient(180deg,#f7faff,#f2f6ff);
  border:1px solid #dbe6ff;border-radius:var(--r-m);padding:12px;margin-bottom:10px;
}
.agent-id{display:flex;align-items:center;gap:9px;margin-bottom:10px}
.agent-av{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-size:15px;
  background:linear-gradient(135deg,#6d8cff,#4a5cff);color:#fff;box-shadow:0 4px 12px rgba(74,92,255,.3);
}
.agent-id b{font-size:12.5px;display:block}
.agent-id span{font-size:10.5px;color:var(--muted)}
.bubble{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 11px;
  font-size:12px;line-height:1.72;color:var(--text-2);white-space:pre-wrap;
}
.bubble.me{background:var(--primary);border-color:var(--primary);color:#fff;margin-left:32px}
.bubble + .bubble{margin-top:8px}
.agent-meta{
  margin-top:9px;border:1px dashed #c9d9ff;border-radius:10px;padding:9px 10px;
  background:#fbfdff;font-size:11px;line-height:1.7;color:var(--text-2);
}
.agent-meta .am-t{font-weight:700;color:#2456c9;margin-bottom:3px;display:block}
.agent-meta .am-r{display:flex;gap:6px;align-items:flex-start;margin-top:3px}
.agent-meta .am-k{flex:0 0 62px;color:var(--muted)}
.agent-meta ul{margin:3px 0 0;padding-left:17px}

/* 热力图 */
.heat{display:grid;grid-template-columns:repeat(10,1fr);gap:5px}
.heat-cell{
  aspect-ratio:1;border-radius:6px;display:grid;place-items:center;
  font-size:10px;font-weight:700;color:#fff;cursor:default;position:relative;
}
.heat-legend{display:flex;align-items:center;gap:7px;font-size:10.5px;color:var(--muted);margin-top:8px}
.heat-scale{display:flex;gap:2px}
.heat-scale i{width:16px;height:8px;border-radius:2px;display:block}

/* 座位管理（2D 拖拽） */
.seatgrid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin:8px 0}
.sg-cell{
  height:44px;border-radius:8px;border:1px dashed var(--line-strong);background:var(--surface);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  font-size:10.5px;color:var(--text-2);cursor:grab;transition:.15s;user-select:none;
}
.sg-cell:hover{border-color:var(--primary-2);background:#fbfdff}
.sg-cell.dragging{opacity:.4}
.sg-cell.drop-ok{border-color:var(--green);background:var(--green-soft);border-style:solid}
.sg-cell .sg-name{font-weight:700;font-size:11px}
.sg-cell .sg-tag{font-size:9px;color:var(--muted)}

.empty{color:var(--muted);font-size:12px;text-align:center;padding:22px 0}

/* 表格 */
.tbl{width:100%;border-collapse:collapse;font-size:11.5px}
.tbl th{
  text-align:left;color:var(--muted);font-weight:600;padding:7px 8px;
  border-bottom:1px solid var(--line);background:var(--surface-2);white-space:nowrap;
}
.tbl th:first-child{border-radius:8px 0 0 8px}
.tbl th:last-child{border-radius:0 8px 8px 0}
.tbl td{padding:8px;border-bottom:1px solid var(--line);vertical-align:middle;line-height:1.5}
.tbl tr:last-child td{border-bottom:0}

/* toast / tooltip */
.toast{
  position:fixed;left:50%;top:70px;transform:translate(-50%,-14px);
  background:rgba(23,32,58,.92);color:#fff;padding:9px 16px;border-radius:10px;font-size:12px;
  opacity:0;pointer-events:none;transition:.25s;z-index:99;backdrop-filter:blur(6px);
  box-shadow:0 8px 24px rgba(23,32,58,.28);max-width:70vw;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

.tooltip{
  position:fixed;pointer-events:none;z-index:98;opacity:0;transition:opacity .14s;
  background:rgba(23,32,58,.93);color:#fff;padding:7px 10px;border-radius:8px;
  font-size:11.5px;line-height:1.5;white-space:nowrap;
  box-shadow:0 6px 18px rgba(23,32,58,.3);
}
.tooltip.show{opacity:1}
.tooltip b{font-weight:700}
.tooltip .tt-sub{opacity:.72;font-size:10.5px}

/* 状态点 */
.dot{width:7px;height:7px;border-radius:50%;display:inline-block;flex:0 0 7px}
.dot-green{background:var(--green)}
.dot-blue{background:var(--primary)}
.dot-amber{background:var(--amber)}
.dot-red{background:var(--red)}
.dot-slate{background:var(--slate)}

.statusbar{
  display:flex;align-items:center;gap:10px;padding:0 14px;font-size:11px;color:var(--muted);
  background:var(--surface);border-top:1px solid var(--line);white-space:nowrap;overflow:hidden;
}
.sb-item{display:inline-flex;align-items:center;gap:6px;overflow:hidden;text-overflow:ellipsis}
.sb-sep{width:1px;height:12px;background:var(--line-strong);flex:0 0 1px}
.sb-note{color:var(--slate)}
.sb-right{margin-left:auto;font-variant-numeric:tabular-nums;color:var(--line-strong)}

/* 学生面板头部 */
.stu-hero{
  display:flex;gap:12px;align-items:center;padding:12px;border-radius:var(--r-m);
  background:linear-gradient(135deg,#f2f6ff,#eaf1ff);border:1px solid #dbe6ff;margin-bottom:10px;
}
.stu-av{
  width:52px;height:52px;border-radius:16px;flex:0 0 52px;display:grid;place-items:center;
  font-size:19px;font-weight:700;color:#fff;position:relative;
  box-shadow:0 5px 14px rgba(23,32,58,.18);
}
.stu-av .sa-dot{
  position:absolute;right:-3px;bottom:-3px;width:14px;height:14px;border-radius:50%;border:2.5px solid #fff;
}
.stu-hi{flex:1;min-width:0}
.stu-hi b{font-size:15px;display:block;line-height:1.3}
.stu-hi .sh-sub{font-size:11.5px;color:var(--muted);line-height:1.5;margin-top:1px}
.stu-hero-tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:5px}

/* 萌宠卡片 */
.pet-card{
  display:flex;gap:11px;align-items:center;border-radius:var(--r-m);padding:11px;
  background:linear-gradient(135deg,#fff7e8,#ffefd8);border:1px solid #ffe0b0;
}
.pet-av{
  width:68px;height:68px;border-radius:16px;flex:0 0 68px;display:grid;place-items:center;padding:3px;
  background:#fff;border:1px solid #ffe0b0;
}
.pet-av img{width:100%;height:100%;object-fit:contain}
.pet-meta{flex:1;min-width:0}
.pet-meta b{font-size:13px;display:block}
.pet-meta .pm-lv{font-size:11px;color:#a86a00;margin-top:2px}
.dim-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin-top:9px}
.dim{background:var(--surface-2);border:1px solid var(--line);border-radius:9px;padding:7px 9px}
.dim .dm-t{font-size:11px;color:var(--text-2);display:flex;justify-content:space-between;margin-bottom:5px}
.dim .dm-lv{color:var(--muted);font-size:10px}

@media (max-width:1180px){
  .drawer{width:400px}
  .rail{width:84px;flex:0 0 84px}
  .topbar-context{display:none}
}

.top-link{color:var(--primary);font-size:12px;font-weight:700;text-decoration:none;white-space:nowrap;padding:6px 8px;border-radius:8px}
.top-link:hover{background:var(--primary-soft)}
.agent-ask-form,.student-demo form{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;margin-bottom:10px}
.agent-ask-form label,.student-demo label{display:block;font-size:11.5px;font-weight:650;color:var(--text-2);margin-bottom:7px}
.agent-input-row{display:flex;gap:7px}
.agent-input-row input{flex:1;min-width:0}
.agent-ask-form input,.student-demo input:not([type=checkbox]),.student-demo textarea,.student-demo select,.roster-search-label input{
  display:block;width:100%;border:1px solid var(--line-strong);border-radius:8px;background:#fff;color:var(--text);padding:8px;font:inherit;margin-top:4px;
}
.student-demo textarea{min-height:68px;resize:vertical}
.student-demo form .chip{margin-top:3px}
.agent-pending{opacity:.7;font-style:italic}
.student-empty,.student-note{font-size:11.5px;color:var(--muted);line-height:1.6}
.student-list{display:grid;gap:7px;margin-bottom:10px}
.student-goal{display:grid;grid-template-columns:1fr auto;gap:4px;background:var(--surface-2);padding:8px;border-radius:8px}
.student-goal b,.student-goal span{grid-column:1}
.student-goal span{color:var(--text-2);font-size:11.5px}
.student-goal small{grid-column:2;grid-row:1;color:var(--primary)}
.student-goal button{grid-column:2;grid-row:2;color:var(--primary);font-size:11px}
.student-stages details{padding:8px;border-bottom:1px solid var(--line);font-size:11.5px;color:var(--text-2)}
.student-stages summary{font-weight:700;cursor:pointer;margin-bottom:4px}
.student-check{display:flex!important;align-items:center;gap:6px;margin-top:10px}
.student-pet{display:flex;align-items:center;gap:14px;line-height:1.8;font-size:13px;color:var(--text-2);margin-bottom:12px;padding:8px;border-radius:12px;background:linear-gradient(135deg,#fffaf1,#f1f6ff)}
.student-pet-art{width:104px;height:104px;flex:0 0 104px;display:grid;place-items:center;border-radius:11px;background:#fff;border:1px solid #f2e2c9}
.student-pet-art img{width:100%;height:100%;object-fit:contain}
.student-pet-copy{min-width:0}
.student-pet-copy>b{display:block;font-size:15px;color:var(--text)}
.student-pet-kind{font-weight:700;color:#a86a00}
.student-task-actions{display:flex;flex-wrap:wrap;gap:6px}
.roster-student{display:flex;align-items:center;width:100%;gap:9px;text-align:left;border-bottom:1px solid var(--line);padding:8px 2px}
.roster-student:hover{background:var(--primary-soft)}
.roster-student>span:nth-child(2){flex:1;min-width:0}
.roster-student b,.roster-student small{display:block}
.roster-student small{font-size:10.5px;color:var(--muted);margin-top:2px}
.roster-avatar{display:grid;place-items:center;width:27px;height:27px;border-radius:8px;color:white;font-weight:700}
.roster-search-label{display:block;font-size:11.5px;margin-bottom:8px}
.notice-form label,#todoActionForm label{display:block;font-size:11.5px;font-weight:650;color:var(--text-2);margin-bottom:8px}
.notice-form input,.notice-form textarea,.notice-form select,#todoActionForm input,#todoActionForm select{display:block;width:100%;border:1px solid var(--line-strong);border-radius:8px;padding:8px;margin-top:4px;background:#fff;color:var(--text);font:inherit}
.notice-form textarea{min-height:90px;resize:vertical}
@media(max-width:720px){
  :root{--topbar-h:54px;--status-h:0px}
  .topbar{gap:8px;padding:0 8px}
  .brand{min-width:0;flex:1}
  .brand-text span,.topbar-context,.statusbar{display:none}
  .topbar-actions{gap:3px}
  .top-link{font-size:11px}
  .seg-btn{padding:0 6px;font-size:10px}
  .rail{width:64px;flex-basis:64px;padding:6px 3px}
  .rail-lb{font-size:9px}
  .rail-item{padding:6px 2px}
  .drawer{width:min(450px,calc(100vw - 64px));max-width:none}
  .drawer-tabs{flex-wrap:nowrap;overflow-x:auto;padding-top:3px}
  .d-tab{font-size:10.5px}
  .legend,.hint-bar{display:none}
  .s2d-grid{overflow-x:auto}
}