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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 | <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Recall — your AI study partner</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,500;12..96,600;12..96,700;12..96,800&family=Hanken+Grotesk:wght@400;500;600;700;800&family=Spline+Sans+Mono:wght@400;500&display=swap" rel="stylesheet">
<style>
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{min-height:100vh;background:#f5f3ee;color:#17160f;font-family:'Hanken Grotesk',system-ui,sans-serif;-webkit-font-smoothing:antialiased;}
textarea{font-family:'Hanken Grotesk',sans-serif;}
::selection{background:#d6dbfb;}
@keyframes recBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@keyframes recFlick{0%,100%{transform:scale(1) rotate(-2deg)}50%{transform:scale(1.1) rotate(2deg)}}
@keyframes recPop{0%{transform:scale(0);opacity:0}60%{transform:scale(1.18)}100%{transform:scale(1);opacity:1}}
@keyframes recShimmer{0%{background-position:-240px 0}100%{background-position:240px 0}}
@keyframes recBanner{0%{transform:translateY(12px);opacity:0}100%{transform:translateY(0);opacity:1}}
@keyframes recSlideIn{0%{transform:translateY(14px) scale(.99)}100%{transform:translateY(0) scale(1)}}
@keyframes recRise{0%{transform:translateY(8px);opacity:0}100%{transform:translateY(0);opacity:1}}
@keyframes recDot{0%,100%{opacity:.25;transform:translateY(0)}50%{opacity:1;transform:translateY(-3px)}}
.ta{width:100%;resize:vertical;border:1px solid #e7e3d9;border-radius:15px;font-size:15px;line-height:1.6;color:#17160f;background:#faf9f6;outline:none;transition:border-color .15s,box-shadow .15s,background .15s;}
.ta:focus{border-color:#3b5bdb;background:#fff;box-shadow:0 0 0 4px #eceefc;}
button{font-family:'Hanken Grotesk',sans-serif;}
.btn-primary{appearance:none;border:none;cursor:pointer;font-weight:700;color:#fff;background:#3b5bdb;border-radius:14px;box-shadow:0 2px 0 #2a3fa6;transition:background .15s,transform .06s,box-shadow .06s;}
.btn-primary:hover{background:#3450cf;}
.btn-primary:active{transform:translateY(1px);box-shadow:0 1px 0 #2a3fa6;}
.btn-dark{appearance:none;border:none;cursor:pointer;font-weight:700;color:#fff;background:#17160f;border-radius:13px;transition:background .15s,transform .06s;}
.btn-dark:hover{background:#2c2a20;}
.btn-dark:active{transform:translateY(1px);}
.btn-ghost{appearance:none;border:1px solid #d8d3c7;background:#fff;cursor:pointer;font-weight:600;color:#3d3b33;border-radius:11px;transition:border-color .15s;}
.btn-ghost:hover{border-color:#17160f;}
.pick:hover{border-color:#3b5bdb !important;}
.pick-warn:hover{border-color:#e8590c !important;}
.chip-sample:hover{border-color:#3b5bdb !important;color:#2b3da8 !important;}
.scan-prev{position:relative;display:inline-flex}
.scan-prev-pop{position:absolute;bottom:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(4px);width:320px;max-width:80vw;border-radius:12px;box-shadow:0 14px 34px rgba(20,18,10,.22);opacity:0;visibility:hidden;transition:opacity .15s ease,transform .15s ease;z-index:40;pointer-events:none;background:#fff;border:1px solid #e7e3d9;overflow:hidden}
.scan-prev:hover .scan-prev-pop,.scan-prev:focus-within .scan-prev-pop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.scan-prev-pop img{display:block;width:100%}
.scan-prev-text{display:block;padding:14px 15px;font-size:12px;line-height:1.55;color:#3b3a32;text-align:left;max-height:190px;overflow:auto}
.scan-prev-cap{font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.03em;padding:7px 10px;border-top:1px solid #efece4;background:#faf9f6;text-align:left}
.diff-easier:hover{border-color:#1f8a5b !important;color:#1f8a5b !important;}
.diff-harder:hover{border-color:#e8590c !important;color:#c2410c !important;}
.tab{appearance:none;border:none;cursor:pointer;font-size:14px;padding:10px 16px;border-radius:11px 11px 0 0;background:transparent;color:#6f6d61;font-weight:600;}
.tab.active{background:#eceefc;color:#2b3da8;font-weight:700;}
</style>
</head>
<body>
<div id="app"></div>
<input id="fileInput" type="file" accept=".pdf,.txt" style="display:none">
<script>
const C = { ink:'#17160f', ink2:'#6f6d61', line:'#e7e3d9', indigo:'#3b5bdb', green:'#1f8a5b', orange:'#e8590c' };
const S = {
screen:'upload', mode:'paste',
sid:null, card:null, view:null,
pasteText:'', fileName:'', sample:'',
generating:false, uploadError:'',
phase:'answering', answer:'', answerShown:'', result:null,
best:0, showBanner:false, missed:'', injectedIds:[],
regenBusy:false, recap:null, animateCard:false,
};
let selectedFile = null;
/* ---------- visual helpers (ported from the design) ---------- */
function mascot(mood){
let k = '';
k += `<line x1="32" y1="11" x2="32" y2="3" stroke="${C.indigo}" stroke-width="3" stroke-linecap="round"/>`;
k += `<circle cx="32" cy="2.5" r="3" fill="${C.orange}"/>`;
k += `<rect x="6" y="10" width="52" height="50" rx="18" fill="${C.indigo}"/>`;
k += `<rect x="14" y="30" width="36" height="24" rx="13" fill="rgba(255,255,255,0.10)"/>`;
const eyeY = mood === 'thinking' ? 25 : 28;
if (mood === 'happy' || mood === 'celebrate'){
k += `<path d="M19 29 q5 -6 10 0" stroke="#fff" stroke-width="2.8" fill="none" stroke-linecap="round"/>`;
k += `<path d="M35 29 q5 -6 10 0" stroke="#fff" stroke-width="2.8" fill="none" stroke-linecap="round"/>`;
k += `<path d="M25 40 q7 8 14 0" stroke="#fff" stroke-width="2.8" fill="none" stroke-linecap="round"/>`;
if (mood === 'celebrate'){
k += `<circle cx="10" cy="16" r="2" fill="${C.orange}"/>`;
k += `<circle cx="54" cy="18" r="2" fill="${C.green}"/>`;
k += `<circle cx="52" cy="40" r="1.6" fill="${C.orange}"/>`;
}
} else if (mood === 'oops'){
k += `<circle cx="24" cy="28" r="6" fill="#fff"/><circle cx="24" cy="29" r="2.6" fill="${C.ink}"/>`;
k += `<circle cx="40" cy="28" r="6" fill="#fff"/><circle cx="40" cy="29" r="2.6" fill="${C.ink}"/>`;
k += `<circle cx="32" cy="45" r="3.2" fill="#fff"/>`;
} else if (mood === 'thinking'){
k += `<circle cx="24" cy="${eyeY}" r="5" fill="#fff"/><circle cx="25" cy="${eyeY-1.5}" r="2.3" fill="${C.ink}"/>`;
k += `<circle cx="40" cy="${eyeY}" r="5" fill="#fff"/><circle cx="41" cy="${eyeY-1.5}" r="2.3" fill="${C.ink}"/>`;
k += `<path d="M28 44 h9" stroke="#fff" stroke-width="2.6" fill="none" stroke-linecap="round"/>`;
} else {
k += `<circle cx="24" cy="28" r="5" fill="#fff"/><circle cx="24" cy="29" r="2.4" fill="${C.ink}"/>`;
k += `<circle cx="40" cy="28" r="5" fill="#fff"/><circle cx="40" cy="29" r="2.4" fill="${C.ink}"/>`;
k += `<path d="M27 42 q5 4 10 0" stroke="#fff" stroke-width="2.6" fill="none" stroke-linecap="round"/>`;
}
return `<svg width="100%" height="100%" viewBox="0 0 64 64" style="display:block;overflow:visible">${k}</svg>`;
}
function flame(){
return `<svg width="100%" height="100%" viewBox="0 0 24 24" style="display:block">`+
`<path d="M12.5 2c.6 3.2 2.7 4.6 3.8 6.6A6.3 6.3 0 0 1 17 11.6C17 15.8 14.1 19.5 11.7 19.5 8.7 19.5 6.2 17 6.2 13.5c0-2.1 1.1-3.6 2.1-4.8.2 1.1.9 1.9 1.8 2.4C9.6 9.3 9.3 6.7 12.5 2z" fill="#e8590c"/>`+
`<path d="M11.6 19.5c1.6 0 3-1.4 3-3.2 0-1.4-1-2.6-1.9-3.6-.3 1.5-1.6 2-1.6 3.4 0 .6.3 1.1.6 1.6-1.1-.2-1.7-1-1.7-2.1-.7.7-1.1 1.5-1.1 2.4 0 .8.9 1.5 2.6 1.5z" fill="#f8b24a"/></svg>`;
}
function scoreDots(r){
if (!r) return '';
const col = r.correct ? C.green : C.orange;
return `<div style="display:flex;gap:5px">` + [0,1,2,3,4].map(i =>
`<div style="width:11px;height:11px;border-radius:99px;background:${i < r.score ? col : '#e7e3d9'}"></div>`).join('') + `</div>`;
}
function masteryBars(){
const stats = (S.view && S.view.topicStats) || {};
const entries = Object.entries(stats);
if (!entries.length)
return `<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:${C.ink2};letter-spacing:.08em;text-transform:uppercase">Mastery · building…</div>`;
const bars = entries.map(([t, s]) => {
const pct = s.total ? s.correct / s.total : 0;
const col = s.total === 0 ? C.line : (pct >= 0.7 ? C.green : C.orange);
const h = Math.max(14, pct * 100);
return `<div title="${esc(t)}: ${Math.round(pct*100)}%" style="width:8px;height:26px;border-radius:5px;background:#e7e3d9;display:flex;align-items:flex-end;overflow:hidden">`+
`<div style="width:100%;height:${h}%;background:${col};border-radius:5px;transition:height .5s cubic-bezier(.2,.8,.2,1)"></div></div>`;
}).join('');
return `<div style="display:flex;align-items:center;gap:12px">`+
`<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:${C.ink2};letter-spacing:.1em;text-transform:uppercase">Mastery</span>`+
`<div style="display:flex;gap:6px;align-items:flex-end;height:26px">${bars}</div></div>`;
}
function queueRail(){
const rail = (S.view && S.view.rail) || [];
const pos = (S.view && S.view.answered) || 0;
return `<div style="display:flex;gap:6px;align-items:center;flex-wrap:wrap">` + rail.map((c, i) => {
const injected = S.injectedIds.includes(c.id) || c.injected;
let bg = '#ded9cd', w = 11;
if (i < pos) bg = C.ink;
if (i === pos) { bg = C.indigo; w = 28; }
if (i > pos && injected) bg = C.orange;
let extra = '';
if (S.injectedIds.includes(c.id)) extra = 'animation:recPop .5s cubic-bezier(.2,.8,.2,1) both;box-shadow:0 0 0 3px rgba(232,89,12,.18);';
return `<div title="${esc(c.topic)}" style="height:11px;width:${w}px;border-radius:6px;background:${bg};transition:all .45s cubic-bezier(.2,.8,.2,1);flex:none;${extra}"></div>`;
}).join('') + `</div>`;
}
function diffLabel(card){
if (!card) return '';
if (card.diffLabel) return card.diffLabel;
if (card.parent_id) return 'drill';
return ({1:'easy',2:'medium',3:'hard'})[card.difficulty] || 'medium';
}
function sourceLabel(card){
if (!card) return '';
return (card.parent_id ? 'Follow-up · ' : 'Notes · ') + card.topic;
}
/* ---------- screens ---------- */
function renderUpload(){
const errBlock = S.uploadError ? `
<div style="margin-top:15px;display:flex;gap:11px;align-items:flex-start;background:#fdeee2;border:1px solid #f6c9aa;border-radius:14px;padding:13px 15px;animation:recRise .25s ease both">
<span style="flex:none;width:20px;height:20px;border-radius:99px;background:#e8590c;color:#fff;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;margin-top:1px">!</span>
<span style="font-size:14px;color:#9a3a06;line-height:1.5">${esc(S.uploadError)}</span>
</div>` : '';
const paste = `
<textarea id="pasteInput" oninput="S.pasteText=this.value" placeholder="Paste your lecture notes, a chapter, anything you want to be quizzed on…" class="ta" style="min-height:158px;padding:15px 17px"></textarea>
<div style="margin-top:13px;display:flex;gap:10px;align-items:center;flex-wrap:wrap">
<button class="chip-sample" onclick="loadSample()" style="appearance:none;border:1px solid #e7e3d9;background:#fff;cursor:pointer;font-family:'Spline Sans Mono',monospace;font-size:12px;color:#6f6d61;padding:8px 13px;border-radius:99px">↺ Paste sample notes</button>
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789">Biology · Photosynthesis & respiration</span>
</div>`;
const filePill = S.fileName ? `
<div style="margin-top:18px;display:inline-flex;align-items:center;gap:10px;background:#eceefc;border:1px solid #c9d0fb;padding:9px 14px;border-radius:99px">
<span style="font-size:13px;font-weight:700;color:#2b3da8">${esc(S.fileName)}</span>
<button onclick="clearFile()" style="appearance:none;border:none;background:transparent;cursor:pointer;color:#6f6d61;font-size:15px;line-height:1;padding:0">✕</button>
</div>` : '';
const upload = `
<div onclick="if(!S.sample&&!S.fileName)document.getElementById('fileInput').click()" style="border:1.5px dashed #cfcabb;border-radius:18px;padding:28px 22px;text-align:center;background:#faf9f6;cursor:pointer">
<div style="font-family:'Spline Sans Mono',monospace;font-size:12px;color:#9a9789;letter-spacing:.04em">DROP A PDF HERE — OR TRY A SAMPLE</div>
<div style="display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap">
<span class="scan-prev">
<button class="pick" onclick="event.stopPropagation();pickBio()" style="display:flex;align-items:center;gap:9px;appearance:none;border:1px solid #e7e3d9;background:#fff;cursor:pointer;padding:9px 13px;border-radius:12px">
<span style="font-family:'Spline Sans Mono',monospace;font-size:9px;font-weight:500;color:#fff;background:#3b5bdb;padding:3px 5px;border-radius:4px;letter-spacing:.04em">PDF</span>
<span style="font-size:13px;font-weight:600;color:#17160f">biology-notes.pdf</span>
</button>
<span class="scan-prev-pop" aria-hidden="true">
<span class="scan-prev-text">Photosynthesis happens in the chloroplast. The light-dependent reactions occur in the thylakoid membranes, where water is split, ATP and NADPH are produced, and oxygen is released. The Calvin cycle takes place in the stroma, where the enzyme RuBisCO fixes CO2 onto RuBP. Cellular respiration occurs in the mitochondria; most ATP is made during oxidative phosphorylation.</span>
<span class="scan-prev-cap">plain-text notes · chunked into a deck</span>
</span>
</span>
<span class="scan-prev">
<button class="pick" onclick="event.stopPropagation();pickScan()" style="display:flex;align-items:center;gap:9px;appearance:none;border:1px solid #e7e3d9;background:#fff;cursor:pointer;padding:9px 13px;border-radius:12px">
<span style="font-family:'Spline Sans Mono',monospace;font-size:9px;font-weight:500;color:#fff;background:#3b5bdb;padding:3px 5px;border-radius:4px;letter-spacing:.04em">IMG</span>
<span style="font-size:13px;font-weight:600;color:#17160f">scanned-slides.pdf</span>
</button>
<span class="scan-prev-pop" aria-hidden="true">
<img src="/api/sample/scan.png" alt="Preview of the synthetic scanned slide" loading="lazy">
<span class="scan-prev-cap">synthetic image · no text layer → OCR'd by the vision model</span>
</span>
</span>
</div>
${filePill}
</div>`;
const overlay = S.generating ? `
<div style="position:absolute;inset:0;border-radius:26px;background:rgba(255,255,255,.94);backdrop-filter:blur(3px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:24px">
<div style="width:66px;height:66px;animation:recBob 1.5s ease-in-out infinite">${mascot('thinking')}</div>
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:21px">Reading your notes…</div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:12px;color:#9a9789">pulling out concepts · writing your deck</div>
<div style="display:flex;flex-direction:column;gap:9px;width:min(360px,76%);margin-top:8px">
${[100,86,64].map(w=>`<div style="height:11px;border-radius:6px;width:${w}%;background:linear-gradient(90deg,#efece4 25%,#e1dccf 37%,#efece4 63%);background-size:400px 100%;animation:recShimmer 1.3s linear infinite"></div>`).join('')}
</div>
</div>` : '';
return `
<div style="max-width:940px;margin:0 auto;padding:46px 24px 90px">
<div style="display:flex;align-items:center;gap:13px;margin-bottom:46px">
<div style="width:46px;height:46px;animation:recBob 4s ease-in-out infinite">${mascot('idle')}</div>
<div style="display:flex;flex-direction:column;line-height:1">
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:25px;letter-spacing:-.025em">Recall</span>
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#6f6d61;letter-spacing:.12em;margin-top:5px">AI STUDY PARTNER</span>
</div>
</div>
<h1 style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:clamp(34px,5.6vw,58px);line-height:1.06;letter-spacing:-.035em;margin:0 0 20px;max-width:16ch;text-wrap:balance">Turn your notes into a quiz that fights back.</h1>
<p style="font-size:18px;line-height:1.55;color:#6f6d61;max-width:48ch;margin:0 0 34px">Drop in a PDF or paste your notes. Recall builds a deck, grades your free-text answers, and the moment you slip it spins up new questions to drill exactly what you missed.</p>
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:26px;box-shadow:0 1px 2px rgba(20,18,10,.04),0 22px 48px -24px rgba(20,18,10,.22);position:relative">
<div style="display:flex;gap:6px;padding:16px 18px 0;border-bottom:1px solid #f0ede5">
<button class="tab ${S.mode==='paste'?'active':''}" onclick="setMode('paste')">Paste notes</button>
<button class="tab ${S.mode==='upload'?'active':''}" onclick="setMode('upload')">Upload PDF</button>
</div>
<div style="padding:20px 22px 22px">
${S.mode==='paste'?paste:upload}
${errBlock}
<div style="display:flex;align-items:center;justify-content:space-between;margin-top:22px;gap:16px;flex-wrap:wrap">
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789;letter-spacing:.03em">12 questions · ~5 min · free-text</span>
<button class="btn-primary" onclick="generate()" style="font-size:16px;padding:14px 24px">Generate quiz deck →</button>
</div>
</div>
${overlay}
</div>
</div>`;
}
function renderStudy(){
const card = S.card || { topic:'', difficulty:2, question:'', id:'' };
const v = S.view || { posDisplay:1, total:1, streak:0 };
const moodHead = S.phase === 'grading' ? 'thinking' : 'idle';
let body = '';
if (S.phase === 'answering'){
body = `
<div style="margin-top:24px">
<textarea id="answerInput" oninput="S.answer=this.value" placeholder="Type your answer in your own words…" class="ta" style="min-height:104px;padding:14px 16px;font-size:16px"></textarea>
<div style="display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:16px;flex-wrap:wrap">
<div style="display:flex;align-items:center;gap:8px">
<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.06em">DIFFICULTY</span>
<button class="diff-easier" onclick="regen('easier')" style="appearance:none;border:1px solid #d8d3c7;background:#fff;cursor:pointer;font-size:13px;font-weight:600;color:#3d3b33;padding:7px 13px;border-radius:99px">↓ Easier</button>
<button class="diff-harder" onclick="regen('harder')" style="appearance:none;border:1px solid #d8d3c7;background:#fff;cursor:pointer;font-size:13px;font-weight:600;color:#3d3b33;padding:7px 13px;border-radius:99px">↑ Harder</button>
</div>
<div style="display:flex;align-items:center;gap:14px">
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789">↵ to submit</span>
<button class="btn-primary" onclick="submit()" style="font-size:15px;padding:12px 22px;border-radius:13px">Check answer</button>
</div>
</div>
</div>`;
} else if (S.phase === 'grading'){
body = `
<div style="margin-top:24px;display:flex;align-items:center;gap:16px;background:#faf9f6;border:1px solid #e7e3d9;border-radius:16px;padding:18px 20px">
<div style="width:46px;height:46px;animation:recBob 1.4s ease-in-out infinite">${mascot('thinking')}</div>
<div>
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:17px">Grading your answer…</div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789;margin-top:2px">comparing to the source · scoring 0–5</div>
</div>
<div style="margin-left:auto;display:flex;gap:5px">
${[0,.15,.3].map(d=>`<div style="width:7px;height:7px;border-radius:99px;background:#3b5bdb;animation:recDot 1s ease-in-out ${d}s infinite"></div>`).join('')}
</div>
</div>`;
} else { // graded
const r = S.result;
const mood = r && r.correct ? 'happy' : 'oops';
const panel = r && r.correct ? `
<div style="margin-top:18px;background:#e6f5ec;border:1px solid #b7e3c8;border-radius:18px;padding:20px 22px;display:flex;gap:16px">
<div style="width:52px;height:52px;flex:none">${mascot(mood)}</div>
<div style="flex:1">
<div style="display:flex;align-items:center;gap:12px;flex-wrap:wrap">
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:18px;color:#1f8a5b">Correct!</span>
<div>${scoreDots(r)}</div>
<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#6f6d61">SCORE ${r.score}/5</span>
</div>
<p style="font-size:15px;line-height:1.55;color:#2f3a33;margin:10px 0 0">${esc(r.explanation)}</p>
<div style="margin-top:12px;display:flex;align-items:center;gap:8px">
<div style="width:18px;height:18px">${flame()}</div>
<span style="font-size:14px;font-weight:700;color:#c2410c">Streak ${v.streak} — keep it lit.</span>
</div>
</div>
</div>` : `
<div style="margin-top:18px;background:#fdeee2;border:1px solid #f6c9aa;border-radius:18px;padding:20px 22px;display:flex;gap:16px">
<div style="width:52px;height:52px;flex:none">${mascot(mood)}</div>
<div style="flex:1">
<div style="display:flex;align-items:center;gap:12px;flex-wrap:wrap">
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:18px;color:#c2410c">Not quite.</span>
<div>${scoreDots(r)}</div>
<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#6f6d61">SCORE ${r.score}/5</span>
</div>
<p style="font-size:15px;line-height:1.55;color:#5a4334;margin:10px 0 0">${esc(r.explanation)}</p>
<div style="margin-top:14px;background:#fff;border:1px dashed #e8a37a;border-radius:12px;padding:11px 14px">
<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#c2410c;letter-spacing:.06em">MISSED CONCEPT</span>
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:16px;color:#9a3a06;margin-top:3px">${esc(r.missed)}</div>
</div>
</div>
</div>`;
body = `
<div style="margin-top:22px">
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.08em">YOUR ANSWER</div>
<p style="font-size:16px;line-height:1.5;color:#56544a;margin:6px 0 0">${esc(S.answerShown)}</p>
</div>
${panel}
<div style="display:flex;justify-content:flex-end;margin-top:22px">
<button class="btn-dark" onclick="next()" style="font-size:15px;padding:12px 22px">Next card →</button>
</div>`;
}
const banner = S.showBanner ? `
<div style="margin-top:16px;background:#e8590c;color:#fff;border-radius:18px;padding:17px 22px;display:flex;align-items:center;gap:16px;box-shadow:0 18px 34px -18px rgba(232,89,12,.65);animation:recBanner .45s cubic-bezier(.2,.85,.25,1) both">
<div style="width:44px;height:44px;flex:none;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.2);border-radius:13px;font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:18px">+${S.injectedIds.length}</div>
<div style="flex:1">
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;opacity:.82;letter-spacing:.1em">ADAPTIVE FOLLOW-UP</div>
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:18px;line-height:1.28;margin-top:3px">You missed ${esc(S.missed)} → ${S.injectedIds.length} new question${S.injectedIds.length===1?'':'s'} just slid into your deck to drill it.</div>
</div>
</div>` : '';
const shimmer = S.regenBusy ? `<div style="position:absolute;inset:-8px;border-radius:14px;background:linear-gradient(90deg,rgba(245,243,238,0),rgba(245,243,238,.85) 50%,rgba(245,243,238,0));background-size:300px 100%;animation:recShimmer 1s linear infinite"></div>` : '';
const cardAnim = S.animateCard ? 'animation:recSlideIn .42s cubic-bezier(.2,.85,.25,1) both;' : '';
return `
<div>
<div style="position:sticky;top:0;z-index:5;background:rgba(245,243,238,.86);backdrop-filter:blur(10px);border-bottom:1px solid #e7e3d9">
<div style="max-width:1080px;margin:0 auto;padding:13px 24px;display:flex;align-items:center;gap:20px">
<div style="display:flex;align-items:center;gap:12px">
<div style="width:36px;height:36px">${mascot(moodHead)}</div>
<div style="display:flex;flex-direction:column;line-height:1.15">
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:16px;letter-spacing:-.02em">Recall</span>
<span style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#6f6d61;letter-spacing:.08em">CARD ${v.posDisplay} / ${v.total}</span>
</div>
</div>
<div style="margin:0 auto">${masteryBars()}</div>
<div style="display:flex;align-items:center;gap:14px">
<div style="display:flex;align-items:center;gap:7px;background:#fdeee2;border:1px solid #f6c9aa;padding:7px 13px;border-radius:99px">
<div style="width:20px;height:20px;animation:recFlick 1.5s ease-in-out infinite">${flame()}</div>
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:16px;color:#c2410c">${v.streak}</span>
</div>
<button class="btn-ghost" onclick="finish()" style="font-size:14px;padding:9px 15px">Finish & recap</button>
</div>
</div>
</div>
<div style="max-width:760px;margin:0 auto;padding:38px 24px 64px">
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:26px;box-shadow:0 1px 2px rgba(20,18,10,.04),0 24px 50px -26px rgba(20,18,10,.2);padding:30px 34px;${cardAnim}">
<div style="display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px">
<div style="display:flex;gap:8px;align-items:center;flex-wrap:wrap">
<span style="font-size:12px;font-weight:700;color:#2b3da8;background:#eceefc;padding:5px 11px;border-radius:99px">${esc(card.topic)}</span>
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#6f6d61;border:1px solid #e7e3d9;padding:4px 9px;border-radius:99px;text-transform:uppercase;letter-spacing:.04em">${esc(diffLabel(card))}</span>
</div>
<span style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789">${esc(sourceLabel(card))}</span>
</div>
<div style="position:relative">
<p style="font-family:'Bricolage Grotesque',sans-serif;font-weight:600;font-size:clamp(22px,3.5vw,31px);line-height:1.2;letter-spacing:-.012em;margin:0;text-wrap:pretty">${esc(card.question)}</p>
${shimmer}
</div>
${body}
</div>
${banner}
<div style="margin-top:28px">
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.08em;margin-bottom:11px;display:flex;justify-content:space-between">
<span>YOUR DECK</span><span>${v.posDisplay} / ${v.total}</span>
</div>
${queueRail()}
</div>
</div>
</div>`;
}
function renderRecap(){
const stats = (S.view && S.view.topicStats) || {};
let totalT = 0, totalC = 0;
Object.values(stats).forEach(st => { totalT += st.total; totalC += st.correct; });
const acc = totalT ? Math.round(totalC/totalT*100) : 0;
// Membership comes from the server recap (average-grade based) so the
// mastered/weak split shown here is exactly what the scheduler resurfaces —
// the % beside each topic is just a display stat from topicStats.
const pctLabel = (t) => {
const st = stats[t]; const pct = st && st.total ? st.correct / st.total : 0;
return Math.round(pct * 100) + '%';
};
const mastered = ((S.recap && S.recap.mastered) || []).map(t => ({ topic: t, pctLabel: pctLabel(t) }));
const weak = ((S.recap && S.recap.weak_topics) || []).map(t => ({ topic: t, pctLabel: pctLabel(t) }));
const answered = (S.view && S.view.answered) || 0;
const recapTitle = acc >= 80 ? 'Strong session.' : acc >= 50 ? 'Solid progress.' : 'Good start.';
const reflection = (S.recap && S.recap.reflection) ||
'You turned shaky topics into targeted drills — spaced repetition will bring the weak ones back first.';
const masteredBlock = mastered.length ? `<div style="display:grid;gap:9px">` + mastered.map(m => `
<div style="display:flex;align-items:center;gap:12px;background:#e6f5ec;border:1px solid #cdeada;border-radius:13px;padding:11px 15px">
<span style="width:18px;height:18px;border-radius:99px;background:#1f8a5b;color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:none">✓</span>
<span style="font-weight:700;font-size:15px;flex:1">${esc(m.topic)}</span>
<span style="font-family:'Spline Sans Mono',monospace;font-size:12px;color:#1f8a5b">${m.pctLabel}</span>
</div>`).join('') + `</div>`
: `<p style="font-size:14px;color:#9a9789;margin:0">Nothing fully locked in yet — another pass and these will turn green.</p>`;
const weakBlock = weak.length ? `<div style="display:grid;gap:9px">` + weak.map(w => `
<div style="display:flex;align-items:center;gap:12px;background:#fdeee2;border:1px solid #f6d2b5;border-radius:13px;padding:11px 15px">
<span style="width:18px;height:18px;border-radius:99px;background:#e8590c;color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:none">↑</span>
<span style="font-weight:700;font-size:15px;flex:1">${esc(w.topic)}</span>
<span style="font-family:'Spline Sans Mono',monospace;font-size:12px;color:#c2410c">${w.pctLabel}</span>
</div>`).join('') + `</div>`
: `<p style="font-size:14px;color:#9a9789;margin:0">Clean sweep — no weak topics this round. 🔥-worthy.</p>`;
return `
<div style="max-width:720px;margin:0 auto;padding:54px 24px 90px;text-align:center">
<div style="width:112px;height:112px;margin:0 auto 6px;animation:recBob 3.6s ease-in-out infinite">${mascot('celebrate')}</div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:11px;color:#9a9789;letter-spacing:.14em">SESSION RECAP</div>
<h1 style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:clamp(32px,6.4vw,50px);letter-spacing:-.035em;margin:8px 0 8px">${recapTitle}</h1>
<p style="font-size:18px;color:#6f6d61;max-width:44ch;margin:0 auto 30px;line-height:1.5;text-wrap:pretty">${esc(reflection)}</p>
<div style="display:flex;gap:13px;justify-content:center;flex-wrap:wrap;margin-bottom:36px">
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:18px;padding:18px 26px;min-width:132px">
<div style="display:flex;align-items:center;justify-content:center;gap:6px"><div style="width:24px;height:24px">${flame()}</div><span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:34px;color:#c2410c">${S.best}</span></div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.06em;margin-top:4px">BEST STREAK</div>
</div>
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:18px;padding:18px 26px;min-width:132px">
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:38px">${acc}%</div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.06em;margin-top:4px">ACCURACY</div>
</div>
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:18px;padding:18px 26px;min-width:132px">
<div style="font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:38px">${answered}</div>
<div style="font-family:'Spline Sans Mono',monospace;font-size:10px;color:#9a9789;letter-spacing:.06em;margin-top:4px">CARDS ANSWERED</div>
</div>
</div>
<div style="text-align:left;display:grid;gap:16px">
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:20px;padding:20px 22px">
<div style="display:flex;align-items:center;gap:9px;margin-bottom:14px">
<span style="width:22px;height:22px;border-radius:99px;background:#1f8a5b;color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center">✓</span>
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:17px">Mastered <span style="color:#6f6d61;font-weight:500">· ${mastered.length}</span></span>
</div>
${masteredBlock}
</div>
<div style="background:#fff;border:1px solid #e7e3d9;border-radius:20px;padding:20px 22px">
<div style="display:flex;align-items:center;gap:9px;margin-bottom:6px">
<span style="width:22px;height:22px;border-radius:99px;background:#e8590c;color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center">↑</span>
<span style="font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:17px">Coming back sooner <span style="color:#6f6d61;font-weight:500">· ${weak.length}</span></span>
</div>
<p style="font-size:12px;color:#9a9789;margin:0 0 14px;font-family:'Spline Sans Mono',monospace;letter-spacing:.02em">spaced repetition will resurface these first</p>
${weakBlock}
</div>
</div>
<div style="display:flex;gap:12px;justify-content:center;margin-top:34px;flex-wrap:wrap">
<button class="btn-primary" onclick="restart()" style="font-size:16px;padding:14px 24px">Study this deck again</button>
<button class="btn-ghost" onclick="newMaterial()" style="font-size:16px;padding:14px 22px;border-radius:14px">New material</button>
</div>
</div>`;
}
/* ---------- render + state plumbing ---------- */
function esc(s){ return String(s==null?'':s).replace(/[&<>"]/g, c => ({'&':'&','<':'<','>':'>','"':'"'}[c])); }
function render(){
const root = document.getElementById('app');
if (S.screen === 'upload') root.innerHTML = renderUpload();
else if (S.screen === 'study') root.innerHTML = renderStudy();
else root.innerHTML = renderRecap();
// restore uncontrolled input values
const p = document.getElementById('pasteInput'); if (p) p.value = S.pasteText;
const a = document.getElementById('answerInput');
if (a){ a.value = S.answer; a.addEventListener('keydown', onAnswerKey); a.focus(); }
S.animateCard = false;
}
function onAnswerKey(e){ if (e.key === 'Enter' && !e.shiftKey){ e.preventDefault(); submit(); } }
async function postJSON(url, body){
const r = await fetch(url, { method:'POST', headers:{'Content-Type':'application/json'}, body: JSON.stringify(body) });
return r.json();
}
/* ---------- upload actions ---------- */
function setMode(m){ S.mode = m; S.uploadError = ''; render(); }
function loadSample(){ S.pasteText = SAMPLE; S.mode = 'paste'; S.uploadError = ''; render(); }
function pickBio(){ S.sample = 'bio'; S.fileName = 'biology-notes.pdf'; selectedFile = null; S.uploadError = ''; render(); }
function pickScan(){ S.sample = 'scan'; S.fileName = 'scanned-slides.pdf'; selectedFile = null; S.uploadError = ''; render(); }
function clearFile(){ S.fileName = ''; S.sample = ''; selectedFile = null; S.uploadError = ''; render(); }
document.getElementById('fileInput').addEventListener('change', (e) => {
const f = e.target.files[0]; if (!f) return;
selectedFile = f; S.fileName = f.name; S.sample = ''; S.mode = 'upload'; S.uploadError = ''; render();
});
const SAMPLE = 'Photosynthesis happens in the chloroplast. The light-dependent reactions occur in the thylakoid membranes, where water is split, ATP and NADPH are produced, and oxygen is released. The Calvin cycle takes place in the stroma, where the enzyme RuBisCO fixes CO2 onto RuBP. Cellular respiration occurs in the mitochondria; most ATP is made during oxidative phosphorylation, as the electron transport chain pumps protons and oxygen acts as the final electron acceptor, forming water.';
async function generate(){
if (S.generating) return;
S.uploadError = '';
if (S.mode === 'paste') S.pasteText = (document.getElementById('pasteInput')||{}).value || S.pasteText;
S.generating = true; render();
const fd = new FormData();
if (S.mode === 'paste') fd.append('text', S.pasteText || '');
else { if (S.sample) fd.append('sample', S.sample); else if (selectedFile) fd.append('file', selectedFile); }
try {
const r = await fetch('/api/generate', { method:'POST', body: fd });
const d = await r.json();
if (d.error){ S.generating = false; S.uploadError = d.error; render(); return; }
S.sid = d.sid; S.card = d.card; S.view = d.view;
S.screen = 'study'; S.phase = 'answering'; S.answer = ''; S.result = null;
S.best = 0; S.showBanner = false; S.injectedIds = []; S.generating = false;
S.animateCard = true; render();
} catch (e){ S.generating = false; S.uploadError = 'Something went wrong reaching the server. Try again.'; render(); }
}
/* ---------- study actions ---------- */
async function submit(){
if (S.phase !== 'answering') return;
S.answer = (document.getElementById('answerInput')||{}).value || '';
S.phase = 'grading'; render();
const d = await postJSON('/api/grade', { sid: S.sid, answer: S.answer });
if (d.error){ S.phase = 'answering'; render(); return; }
S.result = d.grade; S.view = d.view;
S.answerShown = S.answer.trim() ? S.answer : '(left blank)';
S.best = Math.max(S.best, d.view.streak);
S.injectedIds = []; S.showBanner = false; S.phase = 'graded';
render();
// The adaptive follow-up lands a beat after the verdict — the hero moment.
if (!d.grade.correct && d.injectedIds && d.injectedIds.length){
setTimeout(() => { S.missed = d.grade.missed; S.injectedIds = d.injectedIds; S.showBanner = true; render(); }, 600);
}
}
async function regen(dir){
if (S.regenBusy || S.phase !== 'answering') return;
S.answer = (document.getElementById('answerInput')||{}).value || S.answer;
S.regenBusy = true; render();
const d = await postJSON('/api/regenerate', { sid: S.sid, direction: dir });
if (d.card){ S.card = d.card; S.view = d.view; }
S.regenBusy = false; render();
}
async function next(){
const d = await postJSON('/api/next', { sid: S.sid });
if (!d.card){ finish(); return; }
S.card = d.card; S.view = d.view; S.phase = 'answering';
S.answer = ''; S.result = null; S.showBanner = false; S.injectedIds = [];
S.animateCard = true; render();
}
async function finish(){
const d = await postJSON('/api/recap', { sid: S.sid });
S.recap = d.recap; S.view = d.view; S.screen = 'recap'; render();
}
async function restart(){
const d = await postJSON('/api/restart', { sid: S.sid });
S.card = d.card; S.view = d.view; S.screen = 'study'; S.phase = 'answering';
S.answer = ''; S.result = null; S.best = 0; S.showBanner = false; S.injectedIds = [];
S.animateCard = true; render();
}
function newMaterial(){
S.screen = 'upload'; S.mode = 'paste'; S.pasteText = ''; S.fileName = ''; S.sample = '';
selectedFile = null; S.uploadError = ''; S.card = null; S.view = null; S.sid = null;
render();
}
// graded → Enter / ArrowRight advances (keyboard-friendly)
window.addEventListener('keydown', (e) => {
if (S.screen === 'study' && S.phase === 'graded' && (e.key === 'Enter' || e.key === 'ArrowRight')){
e.preventDefault(); next();
}
});
render();
</script>
</body>
</html>
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