:root{
  --navy:#1F3864; --navy2:#2E4F8E; --amber:#E89C2C; --red:#C00000; --green:#2D7D46;
  --card:#F1F3F7; --paper:#FFFFFF; --ink:#222833; --muted:#6B7480; --line:#D8DFE9;
  --soft:#E8EEF7; --amber-soft:#FDF1DD; --red-soft:#FBE9E9; --green-soft:#E7F4EB;
  --shadow:0 6px 20px rgba(21,38,70,.10); --radius:16px;
  --font:Calibri, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%}
body{font-family:var(--font);color:var(--ink);background:#eef2f7;font-size:16px;line-height:1.35}
a{color:var(--navy2);text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0 0 .45em;line-height:1.12;color:var(--navy)}
h1{font-size:34px} h2{font-size:26px} h3{font-size:20px} h4{font-size:17px}
p{margin:.35em 0 .7em}
small,.small{font-size:13px}
.muted{color:var(--muted)}
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.topbar{background:var(--navy);color:#fff;display:flex;align-items:center;gap:18px;padding:10px 22px;box-shadow:0 2px 0 var(--amber)}
.brand{display:flex;align-items:center;gap:12px;color:#fff;min-width:250px}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--amber);color:var(--navy);font-weight:800;letter-spacing:.5px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text b{font-size:20px}
.brand-text small{font-size:12px;color:#D7E1F2;letter-spacing:.4px}
.topbar-mid{flex:1;font-size:13px;color:#C9D6EA;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-actions{display:flex;align-items:center;gap:10px}
.conn{font-size:12px;padding:4px 9px;border-radius:99px;background:rgba(255,255,255,.12);color:#DCE6F6;white-space:nowrap}
.conn[data-state="online"]{background:#1e5b3a;color:#d9f7e6}
.conn[data-state="offline"],.conn[data-state="error"]{background:#7a2020;color:#ffe3e3}
.icon-btn{width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.1);color:#fff;font-weight:700;font-size:15px}
.icon-btn:hover{background:rgba(255,255,255,.2)}
.app-main{flex:1;width:100%;max-width:1500px;margin:0 auto;padding:22px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.card+.card{margin-top:16px}
.card.soft{background:var(--card);box-shadow:none}
.card.warn{border-color:#efc9c9;background:var(--red-soft)}
.card.good{border-color:#bfe3ca;background:var(--green-soft)}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.row.between{justify-content:space-between}
.row.top{align-items:flex-start}
.grid{display:grid;gap:16px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.btn{border:1px solid var(--line);background:#fff;padding:11px 16px;border-radius:12px;font-weight:700;color:var(--navy);min-height:44px}
.btn:hover{border-color:var(--navy2);background:var(--soft)}
.btn.primary{background:var(--amber);border-color:var(--amber);color:var(--navy)}
.btn.primary:hover{filter:brightness(1.04)}
.btn.dark{background:var(--navy);border-color:var(--navy);color:#fff}
.btn.danger{background:#fff;border-color:#e5b4b4;color:var(--red)}
.btn.small{padding:7px 11px;min-height:34px;font-size:13px;border-radius:9px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:99px;padding:7px 11px;font-size:13px;font-weight:600}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}
.pill{display:inline-flex;align-items:center;gap:6px;border-radius:99px;padding:4px 10px;font-size:12px;font-weight:700;background:var(--soft);color:var(--navy)}
.pill.good{background:var(--green-soft);color:var(--green)}
.pill.warn{background:var(--amber-soft);color:#8a4b00}
.pill.bad{background:var(--red-soft);color:var(--red)}
.field{display:flex;flex-direction:column;gap:6px;font-weight:700;color:var(--navy);font-size:14px}
.field input,.field select,.field textarea{border:1px solid var(--line);border-radius:10px;padding:11px 12px;background:#fff;font-weight:500;color:var(--ink);min-height:44px}
.field textarea{min-height:70px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--amber);outline-offset:1px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-grid .wide{grid-column:1/-1}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:stretch}
.hero .lead{background:linear-gradient(135deg,var(--navy),#2b4c86);color:#fff;border:0;position:relative;overflow:hidden}
.hero .lead h1{color:#fff;font-size:38px;max-width:720px}
.hero .lead p{color:#E3EBF8;font-size:18px}
.hero .lead:after{content:"";position:absolute;right:-70px;bottom:-90px;width:280px;height:280px;border:30px solid rgba(232,156,44,.25);border-radius:50%}
.hero .lead .kicker{color:var(--amber);font-weight:800;letter-spacing:.7px;font-size:13px;text-transform:uppercase}
.hero .lead .row{margin-top:22px}
.hero .lead .btn.primary{background:var(--amber)}
.hero .lead .btn.dark{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.35);color:#fff}
.home-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:16px}
.home-grid .card h2{display:flex;align-items:center;gap:10px}
.step-num{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--amber);color:var(--navy);font-weight:800}
.note{background:var(--card);border-left:4px solid var(--amber);padding:12px 14px;border-radius:0 12px 12px 0;color:#3a4352;font-size:14px}
.kpi-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:12px 13px}
.kpi .l{font-size:12px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.35px}
.kpi .v{font-size:25px;font-weight:800;color:var(--navy);line-height:1.1;margin-top:2px}
.kpi .v small{font-size:12px;font-weight:600;color:var(--muted);margin-left:3px}
.kpi .d{font-size:11px;color:var(--muted);margin-top:3px}
.kpi.good .v{color:var(--green)}
.kpi.warn .v{color:#9a5b05}
.kpi.bad .v{color:var(--red)}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}
th{background:var(--navy);color:#fff;font-size:12px;text-transform:uppercase;letter-spacing:.3px}
tr:nth-child(even) td{background:#fafbfd}
td.left,th.left{text-align:left}
td .bar{height:8px;border-radius:99px;background:var(--line);min-width:60px;overflow:hidden}
td .bar>i{display:block;height:100%;background:var(--amber)}
.team-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.team-card{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fff}
.team-card h3{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.seat{display:flex;justify-content:space-between;gap:8px;padding:8px 10px;border-radius:10px;background:var(--card);margin:6px 0;font-size:14px}
.seat.empty{color:var(--muted);background:#fafbfd;border:1px dashed var(--line)}
.seat b{color:var(--navy)}
.badge{display:inline-grid;place-items:center;min-width:32px;height:28px;padding:0 8px;border-radius:9px;background:var(--soft);color:var(--navy);font-weight:800}
.badge.green{background:var(--green-soft);color:var(--green)}
.badge.amber{background:var(--amber-soft);color:#7a4200}
.badge.red{background:var(--red-soft);color:var(--red)}
.progress{height:9px;background:var(--line);border-radius:99px;overflow:hidden}
.progress>i{display:block;height:100%;background:var(--amber);transition:width .35s ease}
.split{display:grid;grid-template-columns:1.45fr .55fr;gap:16px;align-items:start}
.sticky{position:sticky;top:16px}
.toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%,20px);background:var(--navy);color:#fff;padding:12px 18px;border-radius:12px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s;z-index:1000;max-width:min(620px,92vw);font-weight:600}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.bad{background:#8d1f1f}.toast.ok{background:#1f603c}
.modal-back{position:fixed;inset:0;background:rgba(15,25,45,.55);display:grid;place-items:center;z-index:1100;padding:20px}
.modal-card{background:#fff;border-radius:18px;max-width:720px;width:100%;max-height:88vh;overflow:auto;padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px;flex-wrap:wrap}
.teacher-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.teacher-team{border:1px solid var(--line);border-radius:14px;padding:13px;background:#fff}
.teacher-team .head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.ready-dots{display:flex;gap:5px;flex-wrap:wrap}
.dot{width:12px;height:12px;border-radius:50%;background:#d9dfe8;border:1px solid #c6ceda}
.dot.on{background:var(--green);border-color:var(--green)}
.dot.off{background:#fff;border-color:#c6ceda}
.leader{border:1px solid var(--line);border-radius:14px;overflow:hidden}
.leader .item{display:grid;grid-template-columns:36px 1fr auto auto;gap:10px;align-items:center;padding:11px 13px;border-bottom:1px solid var(--line);font-weight:600}
.leader .item:last-child{border-bottom:0}
.leader .rank{font-weight:800;color:var(--amber)}
.leader .score{font-weight:800;color:var(--navy)}
.empty{color:var(--muted);text-align:center;padding:26px 14px}
.error-banner{background:var(--red-soft);border:1px solid #efc2c2;color:#7e2020;padding:10px 13px;border-radius:10px;margin-bottom:12px;font-weight:600}
.loading{display:flex;gap:10px;align-items:center;color:var(--muted);padding:20px}
.spinner{width:18px;height:18px;border:3px solid var(--line);border-top-color:var(--amber);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1100px){.hero{grid-template-columns:1fr}.home-grid{grid-template-columns:1fr}.split{grid-template-columns:1fr}.kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.team-grid{grid-template-columns:1fr}.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.topbar{padding:10px 12px;gap:8px}.topbar-mid{display:none}.brand{min-width:0}.app-main{padding:12px}.card{padding:15px;border-radius:13px}.form-grid{grid-template-columns:1fr}.grid.two,.grid.three{grid-template-columns:1fr}.teacher-grid{grid-template-columns:1fr}.hero .lead h1{font-size:30px}.kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media print{.topbar,.topbar-actions,.btn,.tour-root{display:none!important}.app-main{max-width:none;padding:0}.card{box-shadow:none;border:1px solid #ccc}}