/* Layout: one-column worksheet app (max 560px) on graph paper; each screen is a stack of paper cards, Pip the pencil talks in bubbles */
:root{
  --bg:#EEF3FA; --grid:rgba(46,107,230,.07); --paper:#FFFFFF; --ink:#1B2340; --muted:#56607D; --line:#D6DEEC;
  --pencil:#FFC531; --pencil-deep:#D99A00; --pencil-ink:#2E2200;
  --eraser:#F2617D; --eraser-soft:#FFE6EC; --eraser-ink:#A8203B;
  --go:#14915A; --go-soft:#DDF4E8;
  --blue:#2E6BE6; --blue-soft:#E4ECFD;
  --sun-soft:#FFF3CF; --sun-ink:#6E4E00;
  --margin:#EE8A8A;
  --shadow:0 1px 0 rgba(27,35,64,.05),0 8px 20px -12px rgba(27,35,64,.28);
  --display:"Baloo 2","Arial Rounded MT Bold","Trebuchet MS",system-ui,sans-serif;
  --body:"Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#111829; --grid:rgba(150,180,255,.055); --paper:#1A2340; --ink:#ECF1FB; --muted:#A4AFCB; --line:#2E3A5C;
  --pencil:#FFC531; --pencil-deep:#E2A30A; --pencil-ink:#2A1E00;
  --eraser:#FF7E96; --eraser-soft:#3B2133; --eraser-ink:#FFB8C6;
  --go:#3DCB86; --go-soft:#16372B;
  --blue:#82A9FF; --blue-soft:#1E2D57;
  --sun-soft:#3A3115; --sun-ink:#FFDD7A;
  --margin:#B9585E;
  --shadow:0 1px 0 rgba(0,0,0,.2),0 10px 24px -14px rgba(0,0,0,.7);
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#111829; --grid:rgba(150,180,255,.055); --paper:#1A2340; --ink:#ECF1FB; --muted:#A4AFCB; --line:#2E3A5C;
  --pencil:#FFC531; --pencil-deep:#E2A30A; --pencil-ink:#2A1E00;
  --eraser:#FF7E96; --eraser-soft:#3B2133; --eraser-ink:#FFB8C6;
  --go:#3DCB86; --go-soft:#16372B;
  --blue:#82A9FF; --blue-soft:#1E2D57;
  --sun-soft:#3A3115; --sun-ink:#FFDD7A;
  --margin:#B9585E;
  --shadow:0 1px 0 rgba(0,0,0,.2),0 10px 24px -14px rgba(0,0,0,.7);
  color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
body{background-color:var(--bg);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5;min-height:100vh}
.app{max-width:560px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:14px 56px}
.view{display:flex;flex-direction:column;gap:16px}
h1,h2,h3{font-family:var(--display);line-height:1.12;margin:0;text-wrap:balance;font-weight:800}
p{margin:0}
button{font:inherit}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;padding:0;margin:-1px}
.label{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* paper cards */
.sheet{background:var(--paper);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:18px;min-width:0}
.ruled{position:relative;padding-left:32px}
.ruled::before{content:"";position:absolute;left:17px;top:0;bottom:0;width:2px;background:var(--margin);opacity:.6}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:8px}
.brand h1{font-size:30px;letter-spacing:-.01em}
.brand p{font-size:14px;color:var(--muted);font-weight:700;margin-top:-6px}
.stars-pill{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--paper);border:1px solid var(--line);font-weight:700;font-variant-numeric:tabular-nums}
.stars-pill svg{width:18px;height:18px;color:var(--pencil-deep)}

/* Pip talking */
.say{display:flex;gap:10px;align-items:flex-end}
.say .pip{flex:none}
.bubble{background:var(--paper);border:1px solid var(--line);border-radius:18px 18px 18px 4px;padding:12px 15px;box-shadow:var(--shadow);min-width:0}

/* trial strip */
.trial{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:10px 14px;border-radius:12px;background:var(--sun-soft);color:var(--sun-ink);font-size:15px;font-weight:700}
.trial.ended{background:var(--eraser-soft);color:var(--eraser-ink)}
.trial.plus{background:var(--go-soft);color:var(--ink)}
.trial button{background:none;border:none;color:inherit;font-weight:700;text-decoration:underline;text-underline-offset:3px;cursor:pointer;padding:4px 0}

/* grade picker */
.grade-row{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;margin-top:8px}
.chip{height:44px;border-radius:12px;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);font-weight:700;font-size:16px;cursor:pointer;padding:0;font-variant-numeric:tabular-nums}
.chip:hover{border-color:var(--ink)}
.chip[aria-checked="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.grade-note{font-size:14px;color:var(--muted);margin-top:6px}

/* big snap button */
.snap{display:flex;align-items:center;gap:16px;width:100%;padding:18px 20px;border:none;border-radius:18px;background:var(--pencil);color:var(--pencil-ink);text-align:left;cursor:pointer;box-shadow:0 5px 0 var(--pencil-deep);transition:transform .08s,box-shadow .08s}
.snap:active{transform:translateY(3px);box-shadow:0 2px 0 var(--pencil-deep)}
.snap .ico{width:54px;height:54px;border-radius:14px;background:rgba(255,255,255,.55);display:grid;place-items:center;flex:none}
.snap .ico svg{width:30px;height:30px}
.snap b{font-family:var(--display);font-size:25px;display:block;line-height:1.1;font-weight:800}
.snap small{font-size:15px;display:block;margin-top:2px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:12px;font-weight:700;font-size:16px;cursor:pointer;border:1.5px solid transparent;color:var(--ink);background:var(--paper)}
.btn svg{width:20px;height:20px;flex:none}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn.ghost{border-color:var(--line)}
.btn.ghost:hover{border-color:var(--ink)}
.btn.soft{background:var(--sun-soft);color:var(--sun-ink)}
.btn.link{background:none;color:var(--blue);padding:0 4px;min-height:40px;text-decoration:underline;text-underline-offset:3px}
.btn:disabled{opacity:.55;cursor:default}
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.notice{padding:12px 14px;border-radius:12px;background:var(--eraser-soft);color:var(--eraser-ink);font-weight:700;font-size:15px}

/* samples */
.sample-list{display:grid;gap:10px;margin-top:8px}
.sample{display:grid;grid-template-columns:auto minmax(0,1fr);gap:2px 12px;align-items:center;text-align:left;width:100%;padding:12px 14px;border-radius:14px;border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer}
.sample:hover{border-color:var(--ink)}
.subj{grid-row:span 2;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:19px}
.subj svg{width:22px;height:22px}
.s-math{background:var(--blue-soft);color:var(--blue)}
.s-sci{background:var(--go-soft);color:var(--go)}
.s-read{background:var(--eraser-soft);color:var(--eraser-ink)}
.s-soc{background:var(--sun-soft);color:var(--sun-ink)}
.sample .meta{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.07em}
.sample .txt{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:16px}

.foot{font-size:14px;color:var(--muted);display:grid;gap:8px}
.ai-pill{display:inline-flex;align-items:center;gap:7px;font-weight:700}
.ai-pill i{width:9px;height:9px;border-radius:50%;background:var(--muted)}
.ai-pill.on i{background:var(--go)}
.ai-pill.off i{background:var(--eraser)}

/* lesson */
.bar{display:flex;justify-content:space-between;align-items:center;gap:8px}
.back{background:none;border:none;color:var(--ink);font-weight:700;font-size:16px;padding:8px 2px;cursor:pointer;display:inline-flex;gap:6px;align-items:center}
.back svg{width:18px;height:18px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.tag{font-size:13px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--blue-soft);color:var(--blue)}
.tag.plain{background:var(--bg);color:var(--muted)}
.problem-text{font-size:19px;line-height:1.55}
details.photo{margin-top:10px}
details.photo summary{cursor:pointer;color:var(--blue);font-weight:700;font-size:15px}
details.photo img{margin-top:8px;border-radius:10px;border:1px solid var(--line);max-height:360px;object-fit:contain}
.progress{display:flex;align-items:center;justify-content:space-between;gap:12px}
.dots{display:flex;gap:6px}
.dot{width:24px;height:8px;border-radius:4px;background:var(--line)}
.dot.done{background:var(--go)}
.dot.now{background:var(--pencil)}
.done-steps{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.done-steps li{display:flex;gap:10px;align-items:center;padding:9px 14px;border-radius:12px;background:var(--go-soft);font-size:15px}
.done-steps .ck{width:22px;height:22px;border-radius:50%;background:var(--go);color:var(--paper);display:grid;place-items:center;flex:none}
.done-steps .ck svg{width:14px;height:14px}
.done-steps .t{min-width:0;flex:1}
.done-steps .a{font-weight:700;text-align:right}
.step-no{font-family:var(--display);font-weight:800;color:var(--pencil-deep);font-size:15px;letter-spacing:.06em;text-transform:uppercase}
.step h3{font-size:25px}
.explain{margin-top:6px}
.q{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.q-text{font-weight:700;font-size:18px}
.choices{display:grid;gap:8px}
.choice{text-align:left;padding:12px 14px;min-height:50px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);font-weight:700;font-size:17px;cursor:pointer}
.choice:hover:not(:disabled){border-color:var(--ink)}
.choice.wrong{border-color:var(--eraser);background:var(--eraser-soft);color:var(--eraser-ink);text-decoration:line-through}
.choice.right{border-color:var(--go);background:var(--go-soft);color:var(--ink)}
.choice:disabled{cursor:default}
.ans{display:flex;gap:8px}
.ans-in{flex:1;min-width:0;height:52px;padding:0 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);font-family:var(--body);font-weight:700;font-size:20px}
.ans-in:focus{border-color:var(--blue);outline:none}
.hint{padding:10px 13px;border-radius:12px;background:var(--sun-soft);color:var(--sun-ink);font-size:16px}
.fb{padding:12px 14px;border-radius:12px;font-size:16px}
.fb-good{background:var(--go-soft);border:1.5px solid var(--go)}
.fb-try{background:var(--eraser-soft);color:var(--eraser-ink)}
.fb-show{background:var(--blue-soft);border:1.5px solid var(--blue)}
.fb-info{background:var(--blue-soft)}
.q-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.q-actions:empty{display:none}
.another{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:12px;border:1.5px dashed var(--line)}
.another p{min-width:0}

.win{text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px;padding:22px 18px}
.win h2{font-size:34px}
.final{width:100%;padding:14px;border-radius:12px;background:var(--pencil);color:var(--pencil-ink);font-weight:700;font-size:19px}
.recap{color:var(--muted)}
.earned{display:inline-flex;align-items:center;gap:6px;font-weight:700}
.earned svg{width:20px;height:20px;color:var(--pencil-deep)}
.practice-list{display:grid;gap:12px}
.pcard .tags{margin-bottom:0}
.row{display:flex;gap:10px;flex-wrap:wrap}
.row .btn{flex:1 1 180px}

/* busy + pick */
.busy{align-items:center;text-align:center;padding-top:24px}
.busy img{max-height:220px;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow);object-fit:contain}
.busy h2{font-size:26px}
.busy .sub{color:var(--muted);min-height:1.5em}
.bob{animation:bob 1.3s ease-in-out infinite;transform-origin:50% 90%}
@keyframes bob{50%{transform:translateY(-6px) rotate(-6deg)}}
.pick-list{display:grid;gap:8px}
.pick{display:flex;gap:12px;align-items:flex-start;text-align:left;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;width:100%}
.pick:hover{border-color:var(--ink)}
.pick .num{font-family:var(--display);font-weight:800;font-size:20px;color:var(--pencil-deep);min-width:30px;line-height:1.3}
.pick .t{min-width:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pick-photo{max-height:160px;border-radius:12px;border:1px solid var(--line);object-fit:contain;align-self:center}
textarea{width:100%;min-height:150px;padding:12px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);font:400 18px/1.5 var(--body);resize:vertical}
textarea:focus{border-color:var(--blue);outline:none}

/* plans */
.gate{display:grid;gap:10px}
.gate .ans-in{max-width:200px}
.plans{display:grid;gap:10px}
.plan{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:2px 12px;align-items:center;padding:16px;border-radius:16px;border:2px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;text-align:left;width:100%}
.plan[aria-checked="true"]{border-color:var(--ink);box-shadow:var(--shadow)}
.plan .radio{grid-row:span 2;width:22px;height:22px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center}
.plan[aria-checked="true"] .radio{border-color:var(--ink)}
.plan[aria-checked="true"] .radio::after{content:"";width:12px;height:12px;border-radius:50%;background:var(--ink)}
.plan .name{font-family:var(--display);font-weight:800;font-size:22px;line-height:1.1}
.plan .price{font-weight:700;font-size:20px;text-align:right;font-variant-numeric:tabular-nums}
.plan .sub{font-size:14px;color:var(--muted)}
.plan .per{font-size:14px;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}
.badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:2px 8px;border-radius:999px;background:var(--pencil);color:var(--pencil-ink);margin-left:6px;vertical-align:middle}
.incl{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.incl li{display:flex;gap:10px;align-items:flex-start}
.incl svg{width:20px;height:20px;color:var(--go);flex:none;margin-top:3px}
.fine{font-size:14px;color:var(--muted)}
.demo-note{font-size:14px;padding:10px 12px;border-radius:12px;border:1.5px dashed var(--line);color:var(--muted)}

/* kid profiles */
.me{display:inline-flex;align-items:center;gap:8px;padding:4px 12px 4px 8px;border-radius:999px;background:var(--paper);border:1px solid var(--line);color:var(--ink);cursor:pointer;font-weight:700;min-width:0;min-height:44px}
.me:hover{border-color:var(--ink)}
.me-name{max-width:92px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.me-stars{display:inline-flex;align-items:center;gap:3px;font-variant-numeric:tabular-nums}
.me-stars svg{width:16px;height:16px;color:var(--pencil-deep)}
.who-title{font-size:32px}
.who-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.ptile{display:flex;flex-direction:column;align-items:center;gap:4px;padding:18px 10px 14px;border-radius:18px;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;text-align:center;position:relative;min-width:0;box-shadow:var(--shadow)}
.ptile:hover{border-color:var(--ink)}
.ptile .pn{font-family:var(--display);font-weight:800;font-size:23px;line-height:1.15;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}
.ptile .pg{font-size:14px;color:var(--muted);font-weight:700}
.ptile.add{border-style:dashed;justify-content:center;box-shadow:none;min-height:170px;background:transparent}
.ptile.add .plus{width:56px;height:56px;border-radius:50%;border:2px dashed var(--line);display:grid;place-items:center;font-size:30px;font-weight:700;color:var(--muted)}
.ptile.locked{padding-top:36px}
.ptile.locked .pip{opacity:.45}
.ptile .lock{position:absolute;top:8px;right:8px;font-size:12px;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--sun-soft);color:var(--sun-ink)}
.manage-list{display:grid;gap:8px}
.mrow{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:14px;border:1px solid var(--line);background:var(--paper)}
.mrow .info{min-width:0;flex:1}
.mrow .info b{display:block;font-family:var(--display);font-size:20px;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mrow .info span{display:block;font-size:14px;color:var(--muted)}
#editor{display:grid;gap:18px}
.ed-head{display:flex;align-items:center;gap:12px}
.field{display:grid;gap:8px}
.field .grade-row{margin-top:0}
.text-in{height:52px;padding:0 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);font-family:var(--body);font-weight:700;font-size:18px;width:100%}
.text-in:focus{border-color:var(--blue);outline:none}
.colors{display:flex;gap:10px;flex-wrap:wrap}
.swatch{width:44px;height:44px;border-radius:50%;border:3px solid var(--paper);box-shadow:0 0 0 1.5px var(--line);cursor:pointer;padding:0}
.swatch[aria-checked="true"]{box-shadow:0 0 0 3px var(--ink)}
.btn.link.danger{color:var(--eraser-ink);justify-self:start}

/* math text */
.fr{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;font-size:.8em;line-height:1.08;margin:0 .1em;font-variant-numeric:tabular-nums;position:relative}
.fr>span:first-child{border-bottom:1.5px solid currentColor;padding:0 .14em}

.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}
.confetti i{position:absolute;top:-16px;width:9px;height:14px;border-radius:2px;animation:fall 2.3s cubic-bezier(.25,.6,.4,1) forwards}
@keyframes fall{to{transform:translate(var(--dx),105vh) rotate(var(--r))}}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media (max-width:380px){.snap b{font-size:22px}.brand h1{font-size:26px}.alt-row{grid-template-columns:1fr}}

/* ---------- web beta additions ---------- */
html, body { margin: 0; }
img { max-width: 100%; }
.app { padding-top: calc(14px + env(safe-area-inset-top, 0px)); padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px)); }
.foot a { color: var(--blue); font-weight: 700; }
.vet { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink); }
.vet-ico svg { width: 16px; height: 16px; color: var(--pencil-deep); display: block; }
.qr-card { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; }
.qr-card canvas { border-radius: 12px; border: 1px solid var(--line); }
.qr-status { font-weight: 700; font-size: 18px; }
.qr-link { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 15px; word-break: break-all; background: var(--bg); padding: 8px 12px; border-radius: 10px; user-select: all; max-width: 100%; }
.fb-ask { display: grid; gap: 10px; border-color: var(--pencil); }
.fb-form { display: grid; gap: 18px; }
.fb-opt[aria-checked="true"] { border-color: var(--ink); background: var(--blue-soft); }
#fbThanks .pip { margin-bottom: 4px; }