:root{--navy:#0B1F4B;--blue:#1E55D6;--blue-soft:#E8EFFE;--green:#16A34A;--green-soft:#E3F6EA;--amber:#B45309;--amber-soft:#FEF3C7;--red:#B91C1C;--red-soft:#FDE8E8;
--ink:#1B2433;--muted:#5B6B86;--line:#D9E0EC;--bg:#F4F7FC;--card:#fff;--radius:14px;--shadow:0 1px 2px rgba(11,31,75,.06),0 8px 24px rgba(11,31,75,.06)}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5}
h1,h2,h3{color:var(--navy);margin:0 0 .4em;line-height:1.2}h1{font-size:1.7rem}h2{font-size:1.25rem}h3{font-size:1.05rem}
a{color:var(--blue)}img{max-width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;padding:0 1.1rem;border-radius:10px;border:1px solid transparent;font:600 .95rem inherit;font-family:inherit;cursor:pointer;text-decoration:none;transition:.15s}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:#1747b5}
.btn-dark{background:var(--navy);color:#fff}.btn-dark:hover{background:#071536}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--navy)}.btn-ghost:hover{background:var(--blue-soft)}
.btn-green{background:var(--green);color:#fff}.btn-green:hover{background:#12873c}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}
label{display:block;font-size:.82rem;font-weight:600;color:var(--muted);margin-bottom:.3rem}
input,select{width:100%;min-height:44px;padding:.55rem .8rem;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,.btn:focus-visible{outline:3px solid rgba(30,85,214,.3);outline-offset:1px;border-color:var(--blue)}
.field{margin-bottom:1rem}
.alert{padding:.75rem 1rem;border-radius:10px;font-size:.92rem;margin:.75rem 0}
.alert-err{background:var(--red-soft);color:var(--red)}.alert-ok{background:var(--green-soft);color:#0f6b31}.alert-warn{background:var(--amber-soft);color:var(--amber)}
/* auth pages */
.auth{min-height:100vh;display:grid;place-items:center;padding:1rem;background:linear-gradient(160deg,var(--navy),#12358f 60%,#1E55D6)}
.auth .card{width:100%;max-width:420px;padding:2rem}.auth .logo{display:block;width:210px;margin:0 auto 1.25rem}
.auth .sub{color:var(--muted);text-align:center;margin:-.2rem 0 1.25rem;font-size:.92rem}
/* app shell */
.topbar{position:sticky;top:0;z-index:20;background:var(--navy);color:#fff;display:flex;align-items:center;gap:.75rem;padding:.6rem 1rem}
.topbar img{height:34px}.topbar .school{font-weight:700;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .who{font-size:.85rem;opacity:.85}.topbar .btn{min-height:36px;padding:0 .8rem}
.shell{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 54px)}
.nav{background:#fff;border-right:1px solid var(--line);padding:1rem .75rem}
.nav a{display:flex;align-items:center;gap:.6rem;padding:.7rem .85rem;margin-bottom:.2rem;border-radius:10px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem;min-height:44px}
.nav a:hover{background:var(--bg)}.nav a.on{background:var(--blue-soft);color:var(--blue)}
main{padding:1.25rem;min-width:0;max-width:1200px}
.grid{display:grid;gap:1rem}.g4{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.g2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.stat b{display:block;font-size:1.9rem;color:var(--navy);line-height:1.1}.stat span{color:var(--muted);font-size:.85rem;font-weight:600}
.actions{display:flex;flex-wrap:wrap;gap:.5rem}
.toolbar{display:flex;flex-wrap:wrap;gap:.6rem;align-items:flex-end;margin-bottom:1rem}.toolbar>div{flex:1 1 150px;min-width:0}.toolbar .actions{flex:0 1 auto;max-width:100%;display:flex;gap:.5rem;flex-wrap:wrap}
.tablewrap{overflow:auto;border:1px solid var(--line);border-radius:12px;max-width:100%;
  background:linear-gradient(90deg,#fff 30%,rgba(255,255,255,0)) left/40px 100% no-repeat local,linear-gradient(270deg,#fff 30%,rgba(255,255,255,0)) right/40px 100% no-repeat local,
  radial-gradient(farthest-side at 0 50%,rgba(11,31,75,.25),transparent) left/12px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,rgba(11,31,75,.25),transparent) right/12px 100% no-repeat scroll #fff}   /* shadows show there is more to scroll to */
.grrow{grid-template-columns:70px 70px 130px 1fr;gap:.4rem;margin-bottom:.4rem}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th{position:sticky;top:0;background:var(--navy);color:#fff;text-align:left;padding:.65rem .75rem;font-size:.8rem;white-space:nowrap}
td{padding:.55rem .75rem;border-top:1px solid var(--line)}tbody tr:nth-child(even){background:#F7F9FD}
td.c,th.c{text-align:center}td.tot{font-weight:700;color:var(--navy)}
td input{min-height:38px;width:84px;text-align:center;padding:.25rem}
td input.bad{border-color:var(--red);background:var(--red-soft)}
.badge{display:inline-block;padding:.15rem .6rem;border-radius:999px;font-size:.75rem;font-weight:700}
.b-green{background:var(--green-soft);color:#0f6b31}.b-blue{background:var(--blue-soft);color:var(--blue)}.b-amber{background:var(--amber-soft);color:var(--amber)}.b-grey{background:#EEF1F6;color:var(--muted)}
.bar{height:8px;border-radius:99px;background:#E6EBF4;min-width:80px;overflow:hidden}.bar i{display:block;height:100%;background:var(--green);border-radius:99px}
.hint{color:var(--muted);font-size:.85rem}.empty{text-align:center;color:var(--muted);padding:2rem 1rem}
.sheet-head{display:none}
/* landing */
.hero{background:linear-gradient(160deg,var(--navy),#12358f 60%,#1E55D6);color:#fff;padding:1.2rem 1.25rem 5rem}
.hero .bar2{display:flex;align-items:center;justify-content:space-between;max-width:1100px;margin:0 auto 4rem}.hero .bar2 img{height:44px}
.hero .in{max-width:1100px;margin:0 auto}.hero h1{color:#fff;font-size:clamp(2.2rem,6vw,3.6rem);margin-bottom:.3em}
.hero p.lead{font-size:1.15rem;max-width:620px;opacity:.9}.hero .tag{color:#6EE7A0;font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:.95rem}
.hero .btns{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.6rem}
.section{max-width:1100px;margin:0 auto;padding:3rem 1.25rem}.section h2{font-size:1.7rem}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;margin-top:1.2rem}
.feat .card h3{display:flex;align-items:center;gap:.5rem}.dot{width:10px;height:10px;border-radius:50%;background:var(--green);display:inline-block}
footer.site{background:var(--navy);color:#cbd5ea;text-align:center;padding:2rem 1rem;font-size:.9rem}
@media(max-width:820px){
 .shell{grid-template-columns:1fr}.nav{display:flex;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line);padding:.5rem;position:sticky;top:54px;z-index:10}
 .nav a{white-space:nowrap;margin:0 .2rem 0 0}.topbar .who{display:none}main{padding:.9rem}
 .topbar{gap:.5rem;padding:.5rem .7rem}.topbar #gs{max-width:96px}.topbar .btn{white-space:nowrap;padding:0 .6rem}.topbar .school{font-size:.9rem;min-width:0}
 .grrow{grid-template-columns:1fr 1fr}.grrow .g_c{grid-column:1/-1}
}
@media print{
 .topbar,.nav,.toolbar,.no-print{display:none!important}.shell{display:block}main{padding:0;max-width:none}
 body{background:#fff}.card,.tablewrap{box-shadow:none;border:0}th{background:#fff!important;color:#000!important;border-bottom:2px solid #000}
 td,th{padding:3px 6px;font-size:10pt}.sheet-head{display:block;margin-bottom:10px}.sheet-head h2{font-size:14pt}
 @page{size:A4 portrait;margin:14mm}
}
/* tabs, charts, modal */
.tabs{display:flex;gap:.3rem;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:1rem}
.tab{background:none;border:0;border-bottom:3px solid transparent;padding:.7rem 1rem;font:600 .92rem inherit;font-family:inherit;color:var(--muted);cursor:pointer;min-height:44px}
.tab.on{color:var(--blue);border-color:var(--blue)}
.hbars{display:grid;gap:.45rem}.hb{display:grid;grid-template-columns:minmax(80px,32%) 1fr 52px;gap:.6rem;align-items:center;font-size:.88rem}
.hb .hl{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hb b{text-align:right;color:var(--navy)}
.vbars{display:flex;gap:.6rem;align-items:flex-end;height:130px;padding-top:.5rem}.vb{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:2px;min-width:0}
.vb i{display:block;width:100%;max-width:46px;background:var(--blue);border-radius:6px 6px 0 0}.vb span{font-weight:700;color:var(--navy);font-size:.85rem}.vb b{font-size:.8rem;color:var(--muted)}
dialog.modal{border:0;border-radius:16px;padding:0;width:min(560px,94vw);max-height:90vh;box-shadow:0 20px 60px rgba(11,31,75,.35)}
dialog.modal.wide{width:min(980px,96vw)}dialog.modal::backdrop{background:rgba(11,31,75,.5)}
.mh{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.2rem;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:1}.mh h2{margin:0}
.mh .x{min-height:36px;padding:0 .8rem;font-size:1.3rem}.mb{padding:1.2rem;overflow:auto;max-height:calc(90vh - 70px)}
.pdfv{width:100%;height:70vh;border:1px solid var(--line);border-radius:10px}
textarea{width:100%;padding:.55rem .8rem;border:1px solid var(--line);border-radius:10px;font:inherit;resize:vertical}
.assetbox{height:90px;border:1px dashed var(--line);border-radius:10px;display:grid;place-items:center;margin-bottom:.4rem;background:#fafcff}.assetbox img{max-width:100%;max-height:86px}
@media print{dialog,.tabs{display:none!important}}
[hidden]{display:none!important}

/* ---- pricing tiers */
.tiers{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:1.4rem 0 .6rem}
.tier{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.4rem 1.2rem;display:flex;flex-direction:column;box-shadow:0 2px 10px rgba(11,31,75,.06)}
.tier.featured{border:2px solid var(--blue,#1E5BD8);box-shadow:0 8px 26px rgba(30,91,216,.18)}
.tier h3{margin:0;font-size:1.25rem}.tier .rng{margin:.1rem 0 .8rem;color:#5b6b8c;font-size:.9rem}
.tier .amt{font-size:1.9rem;font-weight:800;margin:0;color:#0B1F4B}.tier .amt small{font-size:.9rem;font-weight:600;color:#5b6b8c}
.tier .reg{margin:.1rem 0 1rem;color:#1c7a4a;font-weight:600;font-size:.92rem}
.tier ul{list-style:none;padding:0;margin:0 0 1.2rem;flex:1}.tier li{padding:.32rem 0 .32rem 1.5rem;position:relative;font-size:.92rem}
.tier li:before{content:"\2713";position:absolute;left:0;color:#1c7a4a;font-weight:700}
.tier .btn{text-align:center;display:block}
.ribbon{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:#1E5BD8;color:#fff;font-size:.75rem;font-weight:700;padding:.2rem .8rem;border-radius:999px;white-space:nowrap}
.reqcard{max-width:760px;margin:1.6rem auto 0}
.paydue{background:#fff;border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem;margin:.6rem 0}.paydue b{font-size:1.25rem}
.tier .amt small{display:inline;white-space:nowrap}
.tier.custom{grid-column:1/-1;background:var(--blue-soft);border-style:dashed}.tier.custom ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));flex:0}
.tier.custom .btn{max-width:260px}
.supportbar{display:flex;gap:.8rem;align-items:center;justify-content:space-between;flex-wrap:wrap;background:#FEF3C7;color:#7A3B05;border-bottom:2px solid #F59E0B;padding:.5rem 1rem;font-size:.9rem;position:sticky;top:0;z-index:50}

/* ---- phone menu drawer */
.menubtn{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0 11px;background:transparent;border:0;border-radius:10px;cursor:pointer;flex:0 0 auto}
.menubtn span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform .2s,opacity .2s}
.menubtn:focus-visible{outline:2px solid #fff;outline-offset:2px}
.navscrim{position:fixed;inset:0;background:rgba(11,31,75,.5);z-index:60}
@media(max-width:820px){
 .menubtn{display:flex}
 .shell{grid-template-columns:1fr}
 .nav{display:block;position:fixed;top:0;bottom:0;left:0;width:min(82vw,300px);z-index:70;overflow-y:auto;overscroll-behavior:contain;border:0;border-right:1px solid var(--line);padding:1rem .75rem;transform:translateX(-105%);transition:transform .22s ease;box-shadow:none;visibility:hidden}
 body.navopen .nav{transform:none;visibility:visible;box-shadow:0 0 40px rgba(0,0,0,.35)}
 body.navopen{overflow:hidden}
 .nav a{white-space:normal;margin:0 0 .2rem 0}
 body.navopen .menubtn span:nth-child(1){transform:translateY(7px) rotate(45deg)}body.navopen .menubtn span:nth-child(2){opacity:0}body.navopen .menubtn span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
 .topbar img{display:none}
}
@media(prefers-reduced-motion:reduce){.nav,.menubtn span{transition:none}}
@media(max-width:820px){.topbar #gs{max-width:64px}.topbar .school{min-width:3rem}}
.meter{height:8px;background:#E8EFFE;border-radius:99px;overflow:hidden;margin:.2rem 0 .7rem}.meter i{display:block;height:100%;background:var(--blue);border-radius:99px}
.g3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}

/* role guides */
.guide h1{margin:.2rem 0}.guide h2{margin:1.4rem 0 .4rem;font-size:1.15rem;color:var(--navy,#0B1F4B)}
.gsteps{padding-left:1.4rem}.gstep{margin:.55rem 0;line-height:1.5;break-inside:avoid}
@media print{.noprint,body.printing-guide .topbar,body.printing-guide .nav,body.printing-guide .tabs,body.printing-guide .supportbar,body.printing-guide #menubtn{display:none!important}
  body.printing-guide .shell{display:block}.guide{font-size:11pt}.guide h2{break-after:avoid}body.guidepage{background:#fff}}

/* ---- teachers choosing their own classes and subjects (invite + group join pages) */
.auth .card.wide{max-width:640px}
.pk-head{margin:.9rem 0 .4rem}.pk-tools{display:grid;grid-template-columns:1fr 160px;gap:.5rem;margin-bottom:.4rem}.pk-count{font-size:.85rem;color:var(--muted);margin-bottom:.4rem}
.pk-list{max-height:52vh;overflow:auto;border:1px solid var(--line);border-radius:12px}
.pk-list details{border-top:1px solid var(--line)}.pk-list details:first-child{border-top:0}
.pk-list summary{cursor:pointer;padding:.7rem .9rem;font-weight:600;color:var(--navy);min-height:44px;display:flex;align-items:center;gap:.5rem}
.pk-act{padding:0 .9rem .4rem;display:flex;gap:.4rem;flex-wrap:wrap}.pk-act .btn{padding:.35rem .7rem;font-size:.82rem;min-height:36px}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;padding:.2rem .9rem .9rem}
.chip{display:inline-flex;align-items:center;gap:.35rem;margin:0;padding:.4rem .7rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;font-weight:600;color:var(--ink);background:#fff;cursor:pointer;min-height:40px}
.chip input{width:auto;min-height:0;margin:0}.chip:has(input:checked){background:var(--blue-soft);border-color:var(--blue);color:var(--blue)}
.chip.off{background:#EEF1F6;color:var(--muted);cursor:not-allowed}.chip.ask{border-color:#E9B949}.chip small{font-weight:500;color:var(--muted)}
.rv-group{border:1px solid var(--line);border-radius:12px;margin:.6rem 0;overflow:hidden}.rv-head{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;justify-content:space-between;padding:.6rem .8rem;background:#F7F9FD}
@media(max-width:480px){.pk-tools{grid-template-columns:1fr}}