/* ND Code site pages: home, student login, teacher dashboard, privacy, terms.
   Same calm look as the lab: charcoal on off-white, muted pastels, no caps, no italics. */
:root{
  --bg:#ECF0EC; --surface:#F8F9F5; --surface-2:#F0F3EE; --ink:#2A3035; --muted:#5B6670; --line:#D2D9D1;
  --accent:#D9773C; --accent-soft:#F6E1D2; --focus:#2F6DB5; --ok:#3F7D4E; --ok-soft:#DCEBDD; --warn:#9A5B17; --warn-soft:#F7E8D3;
  --gold:#B8901F; --gold-soft:#F4E7BF; --robot:#D9773C; --wheel:#2F363B; --star:#E2B547; --mat:#F5F7F2; --mat-line:#D6DDD4; --rock:#9BA09A; --rock-edge:#767C76;
  --c-motion:#C3D7EC; --e-motion:#5E89B7; --c-looks:#DDD2EC; --e-looks:#8669AE; --c-control:#EFDDBC; --e-control:#A97B2E; --c-sense:#C4E2DC; --e-sense:#3F8E80; --c-event:#CBE5CF; --e-event:#4C8C5A;
  --font-ui:"Lexend","Atkinson Hyperlegible",Verdana,Arial,sans-serif; --font-code:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --shadow:0 10px 30px rgba(42,48,53,.10); --target:44px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#1B2024; --surface:#232A2F; --surface-2:#2A3238; --ink:#E4E8E3; --muted:#A3ADB5; --line:#38434B;
  --accent:#E8935E; --accent-soft:#4A3426; --focus:#8DB8EC; --ok:#79B889; --ok-soft:#27392C; --warn:#E3A55C; --warn-soft:#45351F;
  --gold:#D9B44A; --gold-soft:#4A3F1C; --robot:#E8935E; --wheel:#14181B; --star:#D9AE45; --mat:#20272C; --mat-line:#333D44; --rock:#6E7570; --rock-edge:#8D948F;
  --c-motion:#2E4560; --e-motion:#7FA8D6; --c-looks:#41385A; --e-looks:#AF97D6; --c-control:#4E4130; --e-control:#D2AC66; --c-sense:#24463F; --e-sense:#6FC2B1; --c-event:#2B4733; --e-event:#7CC08B;
  --shadow:0 10px 30px rgba(0,0,0,.35); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#1B2024; --surface:#232A2F; --surface-2:#2A3238; --ink:#E4E8E3; --muted:#A3ADB5; --line:#38434B;
  --accent:#E8935E; --accent-soft:#4A3426; --focus:#8DB8EC; --ok:#79B889; --ok-soft:#27392C; --warn:#E3A55C; --warn-soft:#45351F;
  --gold:#D9B44A; --gold-soft:#4A3F1C; --robot:#E8935E; --wheel:#14181B; --star:#D9AE45; --mat:#20272C; --mat-line:#333D44; --rock:#6E7570; --rock-edge:#8D948F;
  --c-motion:#2E4560; --e-motion:#7FA8D6; --c-looks:#41385A; --e-looks:#AF97D6; --c-control:#4E4130; --e-control:#D2AC66; --c-sense:#24463F; --e-sense:#6FC2B1; --c-event:#2B4733; --e-event:#7CC08B;
  --shadow:0 10px 30px rgba(0,0,0,.35); color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ui);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3{line-height:1.2;text-wrap:balance;letter-spacing:-.01em;margin:0 0 .4em}
h1{font-size:clamp(1.9rem,4.2vw,3rem)}
h2{font-size:clamp(1.35rem,2.6vw,1.8rem)}
h3{font-size:1.1rem}
p{margin:0 0 1em}
a{color:var(--focus);text-underline-offset:3px}
em,i{font-style:normal;font-weight:600}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
[hidden]{display:none!important}
.muted{color:var(--muted)}
.label{font-size:.85rem;font-weight:600;color:var(--muted);margin:0}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:760px}
.center-page{min-height:70vh;display:grid;place-items:center;padding-block:40px}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px}
.btn{min-height:var(--target);padding:8px 18px;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);font:inherit;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;cursor:pointer;line-height:1.2}
.btn svg{width:20px;height:20px;flex:none}
.btn.primary{background:var(--ink);color:var(--surface);border-color:var(--ink)}
.btn.accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.ghost{background:transparent}
.btn.big{min-height:56px;padding:10px 24px;font-size:1.08rem;border-radius:14px}
.btn.small{min-height:36px;padding:4px 12px;font-size:.9rem}
.btn.danger{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 50%,var(--line))}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn:not(:disabled):active{transform:translateY(1px)}
.icobtn{width:var(--target);height:var(--target);border-radius:12px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;padding:0;color:var(--ink);cursor:pointer;flex:none}
.icobtn svg{width:20px;height:20px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);font-size:.85rem;font-weight:600}
.chip svg{width:15px;height:15px}

/* header and footer */
.sitehead{border-bottom:1px solid var(--line);background:var(--bg)}
.sitehead .wrap{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;min-height:68px;padding-top:8px;padding-bottom:8px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.15rem;margin-right:auto}
.logo .mark{width:40px;height:40px;border-radius:12px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line));display:grid;place-items:center}
.logo .mark svg{width:26px;height:26px}
.sitenav{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center}
.sitenav a:not(.btn){color:var(--ink);font-weight:600;text-decoration:none;padding:6px 2px}
.sitenav a:not(.btn):hover{text-decoration:underline}
.sitefoot{border-top:1px solid var(--line);margin-top:56px;padding-block:24px 36px;color:var(--muted);font-size:.9rem}
.sitefoot .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
.sitefoot p{margin:0}

/* home */
.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:40px;align-items:center;padding-block:56px 40px}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:52ch}
.hero .row{margin-top:22px}
.hero .note{margin-top:14px;font-size:.9rem;color:var(--muted)}
@media (max-width:880px){.hero{grid-template-columns:minmax(0,1fr);padding-block:32px 24px}}
.art{background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:18px;box-shadow:var(--shadow)}
.art svg{display:block;width:100%;height:auto}
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:8px}
.feat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px}
.feat .fi{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:12px;background:var(--fc,var(--accent-soft));color:var(--fe,var(--accent))}
.feat .fi svg{width:26px;height:26px}
.feat p{margin:0;color:var(--muted)}
.section{padding-block:40px 8px}
.section>h2{margin-bottom:6px}
.section>p.muted{max-width:62ch;margin-bottom:18px}
.supports{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:10px}
.supports li{display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:14px;background:var(--surface);border:1px solid var(--line)}
.supports li svg{width:22px;height:22px;flex:none;color:var(--e-sense);margin-top:2px}
.supports small{display:block;color:var(--muted)}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.ladder{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.ladder li{display:grid;grid-template-columns:110px minmax(0,1fr);gap:12px;align-items:center;padding:10px 12px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line)}
.ladder code{font-family:var(--font-code);font-size:.92rem;white-space:pre-wrap}
.ladder b{font-size:.9rem}
.cta{margin-top:40px;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:28px;display:flex;flex-wrap:wrap;gap:16px 24px;align-items:center;justify-content:space-between}
.cta h2{margin:0}

/* forms */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label,.field .lab{font-weight:600}
.field small{color:var(--muted)}
.input,select.input,textarea.input{min-height:48px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface-2);padding:8px 14px;font:inherit;color:var(--ink);width:100%}
textarea.input{min-height:150px;resize:vertical;line-height:1.5}
.input:focus{border-color:var(--focus);outline:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--focus) 18%,transparent)}
.check{display:flex;gap:10px;align-items:flex-start;margin-bottom:14px}
.check input{width:22px;height:22px;margin-top:2px;accent-color:var(--ok);flex:none}
.formerr{padding:10px 14px;border-radius:12px;border:2px dashed var(--warn);background:var(--warn-soft);margin-bottom:14px;font-weight:600}
.formok{padding:10px 14px;border-radius:12px;border:1.5px solid var(--ok);background:var(--ok-soft);margin-bottom:14px;font-weight:600}
.seg{display:inline-flex;flex-wrap:wrap;gap:4px;padding:4px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line)}
.seg button{min-height:38px;border:0;border-radius:9px;background:transparent;font:inherit;font-weight:600;padding:4px 12px;color:var(--ink);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);box-shadow:0 0 0 2px var(--ink)}
.switchrow{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:10px 0;border-top:1px solid var(--line)}
.switchrow small{display:block;color:var(--muted);font-weight:400}
.switch{width:54px;height:32px;border-radius:999px;border:2px solid var(--line);background:var(--surface-2);position:relative;flex:none;padding:0;cursor:pointer}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:var(--muted);transition:transform .15s}
.switch[aria-checked="true"]{background:var(--ok);border-color:var(--ok)}
.switch[aria-checked="true"]::after{transform:translateX(22px);background:var(--surface)}

/* student login */
.slog{max-width:880px;margin:0 auto;padding-block:28px 40px}
.slog .card{padding:26px}
.stephead{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-bottom:16px}
.stephead h1{font-size:clamp(1.5rem,3.4vw,2.1rem);margin:0}
.codein{font-family:var(--font-code);font-size:clamp(1.6rem,6vw,2.4rem);letter-spacing:.25em;text-transform:uppercase;text-align:center;min-height:72px;font-weight:600;max-width:420px}
.names{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px}
.names button{width:100%;min-height:64px;border-radius:16px;border:1.5px solid var(--line);background:var(--surface-2);display:flex;align-items:center;gap:12px;padding:8px 14px;font:inherit;font-weight:600;font-size:1.05rem;color:var(--ink);cursor:pointer;text-align:left}
.names button:hover{border-color:var(--ink)}
.av{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;flex:none;font-size:1.1rem}
.slots{display:flex;gap:12px;justify-content:center;margin:6px 0 18px}
.slot{width:88px;height:88px;border-radius:20px;border:3px dashed var(--line);display:grid;place-items:center;background:var(--surface-2)}
.slot.full{border-style:solid;border-color:var(--ink);background:#F8F9F5}
.slot svg{width:56px;height:56px}
.pics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:560px;margin:0 auto}
@media (max-width:520px){.pics{grid-template-columns:repeat(3,minmax(0,1fr))}.slot{width:72px;height:72px}.slot svg{width:46px;height:46px}}
.pics button{aspect-ratio:1;border-radius:20px;border:2px solid var(--line);background:var(--pc,var(--surface-2));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font:inherit;font-weight:600;color:#1F2427;cursor:pointer;padding:6px;transition:transform .12s}
.pics button:disabled{cursor:default;opacity:.7}
.pics button svg{width:58%;height:auto;max-height:70px}
.pics button:hover{border-color:var(--ink);transform:translateY(-2px)}
.pics button:active{transform:scale(.96)}
.shake{animation:shake .5s}
@keyframes shake{0%,100%{transform:none}20%{transform:translateX(-10px)}40%{transform:translateX(9px)}60%{transform:translateX(-6px)}80%{transform:translateX(4px)}}
.pic{stroke:#2A3035;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}

/* teacher */
.tbar{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:20}
.tbar .wrap{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;min-height:64px;padding-top:6px;padding-bottom:6px}
.crumbs{display:flex;flex-wrap:wrap;gap:4px 8px;list-style:none;margin:0;padding:0;font-weight:600;flex:1 1 200px;min-width:0}
.crumbs li{color:var(--muted)}
.crumbs li+li::before{content:"›";margin-right:8px;color:var(--muted)}
.crumbs li:last-child{color:var(--ink)}
.crumbs a{color:inherit;text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.tmain{padding-block:22px 40px;display:flex;flex-direction:column;gap:16px}
.authgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;padding-block:28px}
.classes{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.ccard{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:8px;text-decoration:none;color:var(--ink)}
.ccard:hover{border-color:var(--ink)}
.ccard h3{margin:0}
.ccard .code{font-family:var(--font-code);font-weight:600;letter-spacing:.12em}
.newclass{border-style:dashed;align-items:flex-start;justify-content:center;cursor:pointer;font:inherit;text-align:left}
.chead{display:flex;flex-wrap:wrap;gap:14px 24px;align-items:center;justify-content:space-between}
.chead h1{font-size:clamp(1.5rem,3vw,2rem);margin:0}
.bigcode{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;padding:14px 18px;border-radius:16px;background:var(--surface);border:1px solid var(--line)}
.bigcode .code{font-family:var(--font-code);font-size:1.8rem;font-weight:600;letter-spacing:.2em}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.tile{padding:14px 16px;border-radius:16px;background:var(--surface);border:1px solid var(--line)}
.tile b{display:block;font-size:1.7rem;font-variant-numeric:tabular-nums;line-height:1.15}
.tile span{color:var(--muted);font-size:.9rem}
.tile.flag{border:2px solid var(--warn);background:var(--warn-soft)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
table.roster{border-collapse:collapse;width:100%;min-width:880px;font-size:.94rem}
.roster th,.roster td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.roster th{font-size:.84rem;font-weight:600;color:var(--muted);background:var(--surface-2);position:sticky;top:0}
.roster tr:last-child td{border-bottom:0}
.roster td:nth-child(5),.roster td:nth-child(6),.roster td:nth-child(7),.roster td:nth-child(9){white-space:nowrap}
.roster tbody tr{cursor:pointer}
.roster tbody tr:hover{background:color-mix(in srgb,var(--focus) 6%,transparent)}
.who{display:flex;align-items:center;gap:10px;font-weight:600}
.who .av{width:34px;height:34px;font-size:.95rem}
.meter{display:flex;gap:2px;flex-wrap:wrap;max-width:200px}
.meter i{width:9px;height:8px;border-radius:2px;background:var(--line)}
.meter i.f{background:var(--ok)}
.status{display:inline-flex;align-items:center;gap:6px;font-weight:600;white-space:nowrap}
.status::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--muted)}
.status.on::before{background:var(--ok)}
.status.check{color:var(--warn)}
.status.check::before{background:var(--warn);border-radius:2px;transform:rotate(45deg)}
.status.new::before{background:transparent;border:2px solid var(--muted)}
.status.done::before{background:var(--gold)}
.tag{display:inline-block;padding:1px 8px;border-radius:999px;font-size:.8rem;background:var(--surface-2);border:1px solid var(--line);margin:2px 4px 2px 0;white-space:nowrap}
.secret{display:inline-flex;gap:4px;align-items:center;flex-wrap:nowrap}
.secret svg{width:28px;height:28px;background:var(--surface-2);border-radius:8px;padding:3px;border:1px solid var(--line)}
.secret code{font-family:var(--font-code);font-weight:600}
.scrim{position:fixed;inset:0;background:rgba(30,36,40,.42);z-index:40}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(560px,100%);background:var(--surface);border-left:1px solid var(--line);z-index:41;overflow:auto;padding:20px max(22px,env(safe-area-inset-right,0px)) 28px 22px;display:flex;flex-direction:column;gap:16px}
.drawer .dh{display:flex;justify-content:space-between;gap:12px;align-items:center}
.drawer h2{margin:0}
.dsec{display:flex;flex-direction:column;gap:8px;padding-top:14px;border-top:1px solid var(--line)}
.dsec h3{margin:0;font-size:1rem}
.lvtable{width:100%;border-collapse:collapse;font-size:.88rem}
.lvtable th,.lvtable td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line)}
.lvtable th{color:var(--muted);font-weight:600}
.empty{padding:28px;border:2px dashed var(--line);border-radius:18px;text-align:center;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:70;padding:10px 18px;border-radius:999px;background:var(--ink);color:var(--surface);font-weight:600;box-shadow:var(--shadow);max-width:calc(100vw - 32px)}
.legal h2{margin-top:1.6em}
.legal li{margin-bottom:.4em}
.legal .todo{background:var(--warn-soft);border:1.5px dashed var(--warn);border-radius:10px;padding:2px 6px;font-weight:600}

/* printable login cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.lcard{border:2px dashed #9aa3a0;border-radius:16px;padding:14px;background:#fff;color:#1f2427;break-inside:avoid;display:flex;flex-direction:column;gap:6px}
.lcard .nm{font-size:1.3rem;font-weight:700}
.lcard .cls{font-size:.85rem;color:#4a535a}
.lcard .code{font-family:var(--font-code);font-weight:700;letter-spacing:.15em;font-size:1.05rem}
.lcard .pp{display:flex;gap:8px;align-items:flex-end}
.lcard .pp figure{margin:0;text-align:center;font-size:.8rem;font-weight:600}
.lcard .pp svg{width:56px;height:56px;border:1.5px solid #c9d0cc;border-radius:12px;padding:4px;background:#f6f7f4}
.lcard .words{font-family:var(--font-code);font-size:1.2rem;font-weight:700}
.lcard .url{font-size:.8rem;color:#4a535a;word-break:break-all}
.printbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:12px}
.printbar h1,.chead h1{font-size:clamp(1.5rem,3vw,2rem)}
@media print{
  body{background:#fff}
  .tbar,.printbar,.sitefoot,.noprint{display:none!important}
  .tmain{padding:0}
  .cards{grid-template-columns:repeat(3,1fr);gap:8px}
  .lcard{border-color:#888}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* ---------- research ---------- */
.findings{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:14px}
.finding{background:var(--surface);border:1px solid var(--line);border-top:5px solid var(--accent);border-radius:18px;padding:16px 20px 18px;display:flex;flex-direction:column;gap:6px}
.finding p{margin:0}
.finding .big{font-size:1.9rem;font-weight:700;line-height:1.1;color:var(--ink)}
.finding .uni{margin-top:auto;padding-top:8px;font-size:.88rem;font-weight:600;color:var(--muted)}
.rlist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.rlist>li{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px}
.rlist h3{margin:0 0 4px;font-size:1.08rem}
.rlist p{margin:.3em 0}
.rlist .use{border-left:4px solid var(--accent);padding-left:10px;margin-top:8px}
.cite{font-size:.88rem;color:var(--muted);overflow-wrap:anywhere}
.cite a{color:inherit}
/* ---------- start: who's making the account ---------- */
.choose{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:12px}
.choose a{display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:18px;background:var(--surface);border:2px solid var(--line);color:var(--ink);text-decoration:none;min-height:150px}
.choose a:hover,.choose a:focus-visible{border-color:var(--accent)}
.choose a b{font-size:1.15rem}
.choose a span{color:var(--muted)}
.kidbox{background:var(--accent-soft);border:2px solid var(--accent);border-radius:18px;padding:18px 20px;margin-top:8px}
.kidbox h2{margin:0 0 6px}
.kidbox p{margin:0 0 10px}
/* ---------- legal tables ---------- */
.legal table{border-collapse:collapse;width:100%;margin:10px 0 6px;font-size:.95rem}
.legal th,.legal td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.legal th{background:var(--surface-2)}
.legal .tablewrap{overflow-x:auto}
.legal .box{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 16px}
/* ---------- skip link, research page ---------- */
.skip{position:absolute;left:12px;top:-80px;z-index:50;background:var(--ink);color:var(--surface);padding:10px 14px;border-radius:10px;font-weight:600;text-decoration:none}
.skip:focus{top:12px}
.lead{font-size:1.12rem}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 4px}
.toc a{padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;font-weight:600;font-size:.92rem}
.toc a:hover{border-color:var(--accent)}
.section-r{margin-top:36px;scroll-margin-top:16px}
.limits{padding-left:1.2em}
.limits li,.sources li{margin-bottom:.6em}
.sources{font-size:.92rem;overflow-wrap:anywhere;padding-left:1.6em}
.sitenav a[aria-current="page"]{text-decoration:underline;text-decoration-thickness:2px}
/* ---------- grown-up sign up and notices ---------- */
.authgrid.one{grid-template-columns:minmax(0,680px);justify-content:center}
.center{text-align:center}
.kinds{border:0;padding:0;margin:0 0 16px;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:8px}
.kinds legend{font-weight:600;margin-bottom:8px;padding:0}
.kindopt{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1.5px solid var(--line);border-radius:14px;background:var(--surface-2);cursor:pointer}
.kindopt:has(input:checked){border-color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink);background:var(--surface)}
.kindopt input{width:22px;height:22px;margin-top:2px;accent-color:var(--ink);flex:none}
.kindopt small{display:block;color:var(--muted);font-weight:400}
.hp{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}
.notice{display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:12px 16px;border-radius:14px;border:1.5px solid var(--warn);background:var(--warn-soft)}
.notice>svg{width:22px;height:22px;flex:none;color:var(--warn)}
.notice p{margin:0;flex:1 1 260px}
.status.wait{color:var(--warn)}
.status.wait::before{background:transparent;border:2px dashed var(--warn)}
.newhere h2{margin-top:0}
.kidstop h1{font-size:clamp(1.5rem,3vw,2rem)}
.letter{max-width:720px;line-height:1.7}
.letter p{margin:0 0 1em}
ul.plain{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
table.admin{min-width:900px}
@media print{.letter{border:0;padding:0;background:#fff;color:#1f2427}.notice{display:none}}
.legal .tablewrap{margin:10px 0 16px;background:var(--surface)}
.legal .tablewrap table{margin:0;border-style:hidden}
.legal caption.sr{position:absolute}
.asklist{padding-left:1.2em}
.asklist li{margin-bottom:.5em}
.decide{margin-top:24px;border-width:2px}
.decide .row{margin:12px 0}
.linkpage h2{font-size:1.15rem}
.authgrid .card h1,.kidstop h1{font-size:clamp(1.5rem,3vw,2.1rem)}
.linkpage h1:focus{outline:none}
.roster td:first-child{white-space:nowrap}
/* ---------- Sign in with Google: Google's own light and dark button colors ---------- */
:root{--g-bg:#FFFFFF;--g-line:#747775;--g-ink:#1F1F1F}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--g-bg:#131314;--g-line:#8E918F;--g-ink:#E3E3E3}}
:root[data-theme="dark"]{--g-bg:#131314;--g-line:#8E918F;--g-ink:#E3E3E3}
.gbtn{width:100%;min-height:52px;display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 18px;border-radius:12px;border:1px solid var(--g-line);background:var(--g-bg);color:var(--g-ink);font:inherit;font-weight:600;font-size:1.02rem;line-height:1.2;cursor:pointer;text-decoration:none}
.gbtn img{width:20px;height:20px;flex:none}
.gbtn:disabled{opacity:.6;cursor:progress}
@media (hover:hover) and (pointer:fine){.gbtn:not(:disabled):hover{box-shadow:0 1px 4px rgba(0,0,0,.2)}}
.gwrap{display:flex;flex-direction:column;gap:14px;margin:4px 0 16px}
.or{display:flex;align-items:center;gap:12px;margin:0;color:var(--muted);font-size:.9rem}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}
.how{font-size:1.05rem;margin:20px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
.gnote{max-width:680px;margin:20px auto 0}