:root{
  --bg:#08111e;
  --panel:#0f1b2e;
  --panel-2:#13233a;
  --panel-3:#172a44;
  --line:#263a55;
  --text:#eef5ff;
  --muted:#9fb0c7;
  --accent:#79e3bd;
  --accent-2:#8bb8ff;
  --warn:#ffd67a;
  --danger:#ff9b9b;
  --ok:#8fe6a8;
  --shadow:0 18px 50px rgba(0,0,0,.28);
  --radius:18px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:100%}
button,select,input,textarea{font:inherit}
button{cursor:pointer}
.app-shell{min-height:100vh;display:grid;grid-template-columns:255px 1fr}
.sidebar{position:sticky;top:0;height:100vh;background:linear-gradient(180deg,#0a1424 0%,#0d1a2b 100%);border-right:1px solid var(--line);padding:22px 16px;display:flex;flex-direction:column}
.brand{display:flex;align-items:center;gap:12px;padding:2px 6px 18px}
.brand-mark{width:43px;height:43px;border-radius:13px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;color:#07121f;font-weight:900;letter-spacing:-.03em;box-shadow:0 8px 24px rgba(121,227,189,.15)}
.brand-title{font-weight:800;font-size:17px}
.brand-subtitle{color:var(--muted);font-size:11px;margin-top:2px}
.demo-ribbon{font-size:10px;letter-spacing:.15em;font-weight:800;color:var(--warn);border:1px solid rgba(255,214,122,.35);background:rgba(255,214,122,.06);padding:8px 10px;border-radius:10px;margin:0 4px 15px;text-align:center}
.nav{display:flex;flex-direction:column;gap:5px}
.nav-item{border:0;background:transparent;color:#b8c7db;text-align:left;padding:11px 12px;border-radius:11px;display:flex;align-items:center;gap:10px;transition:.16s}
.nav-item span{width:19px;color:#7f94ae;text-align:center}
.nav-item:hover{background:#14243a;color:#fff}
.nav-item.active{background:#19304c;color:#fff;box-shadow:inset 3px 0 0 var(--accent)}
.nav-item.active span{color:var(--accent)}
.sidebar-footer{margin-top:auto}
.privacy-note{font-size:11px;line-height:1.45;color:#8da0b8;background:#0a1626;border:1px solid #1d3048;border-radius:13px;padding:12px;margin-bottom:10px}
.privacy-note strong{display:block;color:#cfe0f5;margin-bottom:3px}
.main{min-width:0}
.topbar{height:89px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid var(--line);background:rgba(8,17,30,.88);backdrop-filter:blur(12px);position:sticky;top:0;z-index:15}
.eyebrow{font-size:10px;letter-spacing:.18em;color:var(--accent);font-weight:800;text-transform:uppercase}
h1{font-size:25px;margin:5px 0 0;letter-spacing:-.025em}
h2{font-size:20px;margin:4px 0 0}
h3{font-size:15px;margin:0}
p{color:var(--muted);line-height:1.5}
.topbar-actions{display:flex;align-items:center;gap:10px}
.status-pill{border:1px solid var(--line);border-radius:999px;padding:9px 12px;color:#b9c9dc;font-size:12px;background:#0c1828}
.pulse{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--ok);margin-right:7px;box-shadow:0 0 0 4px rgba(143,230,168,.1)}
.content{padding:28px 30px 50px;max-width:1600px;margin:0 auto}
.page-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px}
.page-intro p{margin:4px 0 0;max-width:820px}
.grid{display:grid;gap:16px}
.grid.metrics{grid-template-columns:repeat(4,minmax(0,1fr));margin-bottom:16px}
.grid.two{grid-template-columns:1.25fr .75fr}
.grid.equal-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{background:linear-gradient(180deg,var(--panel) 0%,#0d192a 100%);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card.pad{padding:18px}
.metric-card{padding:18px;position:relative;overflow:hidden}
.metric-label{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:#8ea3bc;font-weight:750}
.metric-value{font-size:31px;font-weight:850;margin-top:8px;letter-spacing:-.04em}
.metric-sub{font-size:11px;color:var(--muted);margin-top:3px}
.metric-accent{position:absolute;right:12px;top:12px;font-size:34px;opacity:.11}
.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:13px}
.section-title{font-size:14px;font-weight:800}
.section-subtitle{color:var(--muted);font-size:11px;margin-top:2px}
.primary-btn,.secondary-btn,.ghost-btn,.danger-btn,.small-btn{border-radius:10px;padding:9px 12px;font-weight:750;font-size:12px;border:1px solid transparent}
.primary-btn{background:var(--accent);color:#06151e}
.secondary-btn{background:#152942;border-color:#29415f;color:#eaf2ff}
.ghost-btn{background:transparent;border-color:#29415f;color:#b9c9dc}
.danger-btn{background:rgba(255,155,155,.1);border-color:rgba(255,155,155,.35);color:#ffc4c4}
.small-btn{padding:6px 9px;background:#152942;border-color:#29415f;color:#dfeaff;font-size:11px}
.full{width:100%}
button:disabled{opacity:.45;cursor:not-allowed}
.workflow{display:grid;grid-template-columns:repeat(7,minmax(90px,1fr));gap:8px;align-items:center;margin-top:14px}
.workflow-step{padding:12px 9px;border:1px solid #27415c;background:#11243a;border-radius:12px;text-align:center;min-height:68px;display:flex;flex-direction:column;justify-content:center}
.workflow-step .num{font-size:9px;color:var(--accent);font-weight:850;letter-spacing:.12em}
.workflow-step .name{font-size:11px;font-weight:780;margin-top:4px}
.workflow-arrow{display:none}
.callout{border-left:3px solid var(--accent);padding:13px 14px;background:rgba(121,227,189,.05);border-radius:0 12px 12px 0;color:#c9d8e8;font-size:12px;line-height:1.5}
.alert{border:1px solid rgba(255,214,122,.34);background:rgba(255,214,122,.07);border-radius:14px;padding:14px;display:flex;justify-content:space-between;gap:14px;align-items:center}
.alert.danger{border-color:rgba(255,155,155,.36);background:rgba(255,155,155,.07)}
.alert strong{font-size:13px}
.alert p{font-size:11px;margin:2px 0 0}
.list{display:flex;flex-direction:column;gap:9px}
.list-row{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid #223752;border-radius:12px;padding:11px 12px;background:#0e1c2e}
.list-row:hover{border-color:#365275}
.list-main{min-width:0}
.list-title{font-weight:760;font-size:12px}
.list-meta{font-size:10px;color:var(--muted);margin-top:3px}
.badges{display:flex;gap:5px;flex-wrap:wrap}
.badge{display:inline-flex;align-items:center;border-radius:999px;padding:4px 7px;font-size:9.5px;font-weight:750;background:#182b44;color:#bfd0e4;border:1px solid #2a405e}
.badge.ok{background:rgba(143,230,168,.08);border-color:rgba(143,230,168,.28);color:#afeebf}
.badge.warn{background:rgba(255,214,122,.08);border-color:rgba(255,214,122,.28);color:#ffe09d}
.badge.danger{background:rgba(255,155,155,.08);border-color:rgba(255,155,155,.28);color:#ffc0c0}
.badge.accent{background:rgba(121,227,189,.08);border-color:rgba(121,227,189,.3);color:#a8efd6}
.badge.blue{background:rgba(139,184,255,.08);border-color:rgba(139,184,255,.28);color:#b9d4ff}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}
table{width:100%;border-collapse:collapse;font-size:11px}
th{text-align:left;color:#93a7bf;text-transform:uppercase;letter-spacing:.08em;font-size:9px;background:#0d1929;position:sticky;top:0;padding:10px 11px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:11px;border-bottom:1px solid #1c3048;color:#d7e3f0;vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#11233a}
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
select,input,textarea{background:#0c1828;border:1px solid #29405d;color:#eaf2ff;border-radius:9px;padding:8px 9px;outline:none}
select:focus,input:focus,textarea:focus{border-color:#52759d}
.teacher-card,.group-card,.student-card{padding:15px}
.teacher-top,.group-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.avatar{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-weight:850;background:#18324f;color:#bdddff;border:1px solid #2e4d6e}
.teacher-name,.group-name{font-size:13px;font-weight:800}
.teacher-role,.group-sub{font-size:10px;color:var(--muted);margin-top:2px}
.teacher-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:13px}
.kv{border-top:1px solid #203550;padding-top:8px}
.kv-label{font-size:9px;color:#7f94ae;text-transform:uppercase;letter-spacing:.08em}
.kv-value{font-size:11px;font-weight:700;margin-top:3px}
.skill-chips{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}
.meter{height:6px;background:#0a1524;border-radius:999px;overflow:hidden;margin-top:7px}
.meter > span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px}
.progress-row{display:flex;align-items:center;gap:8px}
.progress-row .meter{width:90px;margin:0}
.calendar{display:grid;grid-template-columns:90px repeat(4,minmax(160px,1fr));border:1px solid var(--line);border-radius:14px;overflow:hidden}
.cal-head{background:#0d1929;font-weight:800;font-size:10px;color:#9fb2c9;padding:11px;border-bottom:1px solid var(--line)}
.cal-time{background:#0b1727;padding:12px 9px;font-size:10px;color:#8fa3bb;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.cal-cell{min-height:105px;padding:8px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#0d1a2b}
.cal-event{border-left:3px solid var(--accent-2);background:#142a43;border-radius:8px;padding:8px;margin-bottom:6px;font-size:10px}
.cal-event.coverage{border-left-color:var(--warn)}
.cal-event .event-title{font-weight:780}
.cal-event .event-meta{color:#9eb0c5;margin-top:3px}
.session-layout{display:grid;grid-template-columns:300px 1fr;gap:16px}
.session-picker .list-row{cursor:pointer}
.session-picker .list-row.active{border-color:var(--accent);background:#11283b}
.attendance-row{display:grid;grid-template-columns:1.25fr .7fr 1fr .8fr;gap:8px;align-items:center;padding:10px 0;border-bottom:1px solid #20334c}
.attendance-row:last-child{border-bottom:0}
.segmented{display:flex;gap:3px;background:#091522;border:1px solid #253a55;border-radius:9px;padding:3px}
.segmented button{background:transparent;border:0;color:#8fa3bb;padding:5px 7px;border-radius:6px;font-size:9px;font-weight:750}
.segmented button.active{background:#1f3855;color:#fff}
.coverage-candidate{display:grid;grid-template-columns:48px 1fr auto;gap:12px;align-items:center;border:1px solid #253a55;border-radius:13px;padding:12px}
.score{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:#10253a;border:1px solid #2c4967;font-size:13px;font-weight:850;color:var(--accent)}
.reason-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.empty{padding:30px;text-align:center;color:#879bb3;border:1px dashed #29405a;border-radius:14px}
.modal{border:0;background:transparent;padding:18px;width:min(720px,94vw);color:var(--text)}
.modal::backdrop{background:rgba(3,8,15,.7);backdrop-filter:blur(3px)}
.modal-card{background:#0d192a;border:1px solid #2a405d;border-radius:18px;box-shadow:0 30px 90px rgba(0,0,0,.5);padding:0;overflow:hidden}
.modal-header{padding:18px 20px;border-bottom:1px solid #253950;display:flex;justify-content:space-between}
.modal-body{padding:20px;max-height:70vh;overflow:auto}
.icon-btn{width:34px;height:34px;border-radius:9px;background:#14263c;border:1px solid #2a405d;color:#cdd9e7;font-size:20px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-field label{display:block;font-size:10px;color:#91a5bd;margin-bottom:5px}
.form-field select,.form-field input,.form-field textarea{width:100%}
.toast{position:fixed;right:24px;bottom:24px;background:#102438;border:1px solid #31506d;padding:12px 14px;border-radius:12px;box-shadow:var(--shadow);font-size:11px;color:#dce8f5;opacity:0;transform:translateY(12px);pointer-events:none;transition:.2s;z-index:50;max-width:340px}
.toast.show{opacity:1;transform:translateY(0)}
.tour-highlight{outline:2px solid var(--accent);outline-offset:3px}
@media (max-width:1150px){
  .grid.metrics{grid-template-columns:repeat(2,1fr)}
  .grid.three{grid-template-columns:repeat(2,1fr)}
  .grid.two,.grid.equal-two{grid-template-columns:1fr}
  .workflow{grid-template-columns:repeat(4,1fr)}
  .session-layout{grid-template-columns:1fr}
}
@media (max-width:800px){
  .app-shell{grid-template-columns:78px 1fr}
  .brand>div:not(.brand-mark),.demo-ribbon,.nav-item{font-size:0}
  .nav-item span{font-size:16px}
  .nav-item{justify-content:center;padding:12px}
  .privacy-note{display:none}
  .topbar{padding:0 16px}
  .status-pill{display:none}
  .content{padding:20px 16px}
  .grid.metrics,.grid.three{grid-template-columns:1fr}
}