:root{--bg:#070b16;--bg2:#0d1426;--bg3:#121b33;--ink:#f5f5f7;--mute:#9aa4bd;--line:rgba(255,255,255,.12);--sea:#7dd3fc;--sand:#f2d7a6;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 Inter,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:var(--ink)}
input,select,textarea{background:var(--bg3);border:1px solid var(--line);border-radius:14px;padding:13px 14px;width:100%;font-size:16px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--sea)}
label{display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--mute)}
h1{margin:0 0 6px;font-size:clamp(30px,4.5vw,46px);letter-spacing:-.04em;line-height:1.05}
h3{margin:28px 0 12px;font-size:19px;letter-spacing:-.02em}
.mu{color:var(--mute)}.msg{color:var(--sand);min-height:20px;margin:12px 0 0;font-size:14px}
.pri,.ghost{display:inline-block;border-radius:99px;cursor:pointer;text-align:center}
.pri{background:var(--sea);color:#04111c;border:0;padding:13px 26px;font-weight:600}
.ghost{background:none;border:1px solid var(--line);padding:9px 18px;font-size:14px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:22px}
.hd{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px clamp(16px,3vw,40px);border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(7,11,22,.92);backdrop-filter:blur(14px);z-index:5}
.hd img{height:34px;display:block}.hd .em{font-size:14px;margin-right:12px}
.lay{display:grid;grid-template-columns:230px minmax(0,1fr);gap:clamp(20px,3vw,48px);max-width:1180px;margin:0 auto;padding:28px clamp(16px,3vw,40px) 80px}
.side{display:flex;flex-direction:column;gap:4px;position:sticky;top:90px;align-self:start}
.side a{padding:11px 16px;border-radius:14px;color:var(--mute);font-weight:500}
.side a:hover{background:var(--bg2);color:var(--ink)}.side a.on{background:var(--ink);color:#000}
@media(max-width:820px){.lay{grid-template-columns:1fr}.side{flex-direction:row;overflow-x:auto;position:static;padding-bottom:6px}.side a{white-space:nowrap;border:1px solid var(--line)}}
.card{background:var(--bg2);border-radius:24px;padding:clamp(20px,3vw,32px);margin-top:22px}
.fg{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr));gap:18px}
.pbar{height:8px;border-radius:9px;background:var(--line);overflow:hidden;margin:14px 0 6px;max-width:460px}.pbar i{display:block;height:100%;background:var(--sea)}
.sec{background:var(--bg2);border-radius:24px;padding:24px 26px;margin-top:18px}
.sech{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.sech h3{margin:0}
dl.dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(210px,100%),1fr));gap:16px 26px;margin:0}
dt{font-size:13px;color:var(--mute)}dd{margin:2px 0 0;overflow-wrap:anywhere}
.na{color:var(--mute);font-style:normal;opacity:.7}
.ec{border:1px solid var(--line);border-radius:16px;padding:16px;margin:10px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(180px,100%),1fr));gap:12px 20px;position:relative}
.ent{border:1px solid var(--line);border-radius:18px;padding:18px;margin:0 0 14px;position:relative}
.ent .fg{padding-top:8px}.ent .rm{position:absolute;top:10px;right:10px;padding:4px 12px;font-size:13px;color:var(--sand)}
.chip{display:inline-block;padding:7px 14px;border-radius:99px;border:1px solid var(--line);margin:4px 6px 4px 0;font-size:14px;color:var(--mute)}
.chip.on{background:rgba(125,211,252,.14);border-color:var(--sea);color:var(--ink)}
.chip a{color:var(--sea);margin-left:6px}
.note{background:var(--bg3);border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin-top:18px;font-size:14px;color:var(--mute)}
.note a{color:var(--sea)}
.ulist{padding:6px 22px}
.ur{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:6px 16px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.ur:last-child{border-bottom:0}
.ur input[type=checkbox]{width:20px;height:20px;padding:0;accent-color:#7dd3fc}
.un{display:flex;flex-direction:column;min-width:0}.un b{font-weight:500}
.uf{color:var(--mute);font-size:13px;overflow-wrap:anywhere}.uf em{color:var(--sea);font-style:normal}
.ua{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}label.ub{display:inline-block;flex-direction:row;color:var(--ink);cursor:pointer}
@media(max-width:600px){.ur{grid-template-columns:auto 1fr}.ua{grid-column:1/-1;justify-content:flex-start}}
.danger{margin-top:36px;padding-top:20px;border-top:1px solid var(--line)}
.empty{color:var(--mute);margin:18px 0 0}
.r{display:grid;grid-template-columns:auto 1fr;gap:6px 22px;padding:26px 0;border-top:1px solid var(--line)}
.r .rk{font-size:clamp(38px,6vw,64px);font-weight:700;letter-spacing:-.05em;line-height:1;color:var(--sea);grid-row:span 3}
.r h3{margin:0;font-size:clamp(22px,3vw,30px);display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline}
.r h3 em{font-style:normal;font-size:14px;font-weight:500;color:var(--sand)}
.bar{height:6px;border-radius:9px;background:var(--line);overflow:hidden;max-width:420px}.bar i{display:block;height:100%;background:var(--sea);border-radius:9px;transition:width .8s}
.r ul{margin:6px 0 0;padding-left:18px;color:var(--mute);font-size:15px}.r li{margin:4px 0}.r.top .rk{color:var(--sand)}
.authbox{max-width:440px;margin:7vh auto;padding:0 18px}
.authbox .card{margin-top:18px}.authbox form{display:grid;gap:14px}
.tabs{display:flex;gap:6px;margin:18px 0 0}.tabs button{background:none;border:1px solid var(--line);border-radius:99px;padding:9px 18px;color:var(--mute);cursor:pointer}.tabs button.on{background:var(--ink);color:#000;border-color:var(--ink)}
#toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,20px);background:#fff;color:#000;padding:10px 18px;border-radius:99px;font-size:14px;opacity:0;transition:.3s;z-index:40;pointer-events:none}#toast.on{opacity:1;transform:translate(-50%,0)}

/* sign in / sign up / reset */
.au{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.au-l{position:relative;overflow:hidden;padding:clamp(28px,5vw,64px);display:flex;flex-direction:column;justify-content:center;background:linear-gradient(160deg,#0c1a3d,#070b16 72%);border-right:1px solid var(--line)}
.au-bg i{position:absolute;border-radius:50%;filter:blur(80px);opacity:.28;animation:aufl 18s ease-in-out infinite alternate}
.au-bg i:nth-child(1){width:380px;height:380px;background:#2b6cb0;left:-100px;top:-60px}.au-bg i:nth-child(2){width:300px;height:300px;background:#b8924a;right:-80px;bottom:60px;opacity:.16;animation-delay:-6s}.au-bg i:nth-child(3){width:220px;height:220px;background:#7dd3fc;left:30%;bottom:-80px;opacity:.12;animation-delay:-11s}
@keyframes aufl{to{transform:translate(40px,-30px) scale(1.15)}}
.au-l>*:not(.au-bg){position:relative;z-index:1}
.au-logo img{height:48px;display:block}.au-tag{color:var(--sand);letter-spacing:.2em;text-transform:uppercase;font-size:.72rem;margin:12px 0 clamp(28px,7vh,72px)}
.au-l h2{margin:0 0 30px;font-size:clamp(2rem,3.6vw,3.2rem);line-height:1.05;letter-spacing:-.04em;max-width:14ch}
.au-pts{list-style:none;margin:0;padding:0;display:grid;gap:20px}.au-pts li{display:grid;gap:2px;padding-left:18px;border-left:2px solid rgba(125,211,252,.35);animation:auin .7s both}.au-pts li:nth-child(2){animation-delay:.12s}.au-pts li:nth-child(3){animation-delay:.24s}
.au-pts b{font-weight:600}.au-pts span{color:var(--mute);font-size:14px}.au-foot{margin:clamp(28px,6vh,64px) 0 0;color:var(--mute);font-size:13px}
.au-r{display:flex;flex-direction:column;justify-content:center;padding:clamp(72px,8vw,64px) clamp(22px,5vw,64px) 40px;position:relative}
.au-back{position:absolute;top:24px;left:clamp(22px,5vw,64px);color:var(--mute);font-size:14px;transition:color .3s,transform .3s}.au-back:hover{color:var(--sea);transform:translateX(-3px)}
.au-box{width:100%;max-width:430px;margin:0 auto;animation:auin .7s .1s both}
.au-tabs{display:inline-flex;padding:4px;border:1px solid var(--line);border-radius:99px;margin-bottom:24px}.au-tabs a{padding:9px 20px;border-radius:99px;color:var(--mute);font-size:14px;font-weight:500;transition:background .3s,color .3s}.au-tabs a:hover{color:var(--ink)}.au-tabs a.on{background:var(--ink);color:#000}
.au-f{display:grid;gap:14px;margin-top:22px}.small{font-size:14px;margin-top:18px}
.pw{position:relative;display:block}.pw input{padding-right:70px}.eye{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--sea);cursor:pointer;font-size:13px;padding:8px 12px}
.meter{height:4px;background:var(--line);border-radius:4px;margin-top:-6px;overflow:hidden}.meter i{display:block;height:100%;width:0;background:#f87171;transition:width .4s,background .4s}.meter i[data-s="2"]{background:#fbbf24}.meter i[data-s="3"],.meter i[data-s="4"]{background:#34d399}
.chk{flex-direction:row;align-items:flex-start;gap:10px;line-height:1.45}.chk input{width:18px;height:18px;margin-top:2px;padding:0;accent-color:#7dd3fc;flex:none}.chk a{color:var(--sea)}
.lnk{background:none;border:0;color:var(--sea);cursor:pointer;text-align:left;padding:0;font-size:14px;justify-self:start}.lnk:hover{text-decoration:underline}
.au-ic{width:56px;height:56px;border-radius:50%;background:rgba(125,211,252,.14);display:grid;place-items:center;margin-bottom:16px;font-size:26px}
.au-code{text-align:center;letter-spacing:.35em;font-size:28px;font-weight:600;padding:16px}
@keyframes auin{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.pri{transition:transform .3s,box-shadow .3s}.pri:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 26px rgba(125,211,252,.25)}.pri:disabled{opacity:.6;cursor:wait}
.ghost{transition:border-color .3s,color .3s}.ghost:hover:not(:disabled){border-color:var(--sea);color:var(--sea)}
.card,.sec,.ent{animation:auin .6s both}
:focus-visible{outline:2px solid var(--sea);outline-offset:3px}
@media(max-width:860px){.au{grid-template-columns:1fr}.au-l{padding:26px 22px;border-right:0;border-bottom:1px solid var(--line)}.au-l h2,.au-pts,.au-foot{display:none}.au-tag{margin-bottom:0}.au-r{padding-top:56px}.au-back{top:16px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* student header: website links */
.hnav{display:flex;gap:4px;flex-wrap:wrap;justify-content:center}.hnav a{padding:8px 14px;border-radius:99px;color:var(--mute);font-size:14px;font-weight:500;transition:color .3s,background .3s}.hnav a:hover{color:var(--ink);background:var(--bg2)}
.side .home{margin-top:10px;padding-top:16px;border-top:1px solid var(--line);border-radius:0;color:var(--sea)}.side .home:hover{background:none;color:#fff}
@media(max-width:820px){.hnav{display:none}.side .home{margin:0;padding:11px 16px;border:1px solid var(--line);border-radius:14px}}

/* responsive: phones, tablets and desktops */
body{overflow-x:hidden}
img,video,canvas{max-width:100%}
.lay>*{min-width:0}
.au-back{padding:10px 0}
.lnk{padding:8px 0}
@media(max-width:860px){.au-back{top:8px}}
.hd>span{display:flex;align-items:center;gap:10px;min-width:0}
.hd .em{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lay p,.lay dd,.lay td,.lay li{overflow-wrap:break-word}
@media(max-width:560px){.hd .em{display:none}.hd img{height:28px}}
.hd>a{display:block;padding:6px 0}
@media(max-width:820px){.ur input[type=checkbox]{width:24px;height:24px}}