:root{--bg:#fff8ef;--card:#ffffff;--ink:#3b2f2a;--muted:#7a6a60;--acc:#e07a5f;--acc2:#3d8b8b;--sun:#f2cc8f;--sage:#81b29a;--line:#f1e3d3;--r:22px}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:"Rubik","Assistant","Segoe UI",Arial,sans-serif;font-size:18px;line-height:1.6}
a{color:var(--acc2)}
header.top{position:sticky;top:0;z-index:20;background:rgba(255,248,239,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.topbar{display:flex;align-items:center;gap:10px;padding:8px 14px;max-width:1100px;margin:auto}
.topbar img.logo{height:46px;width:auto;border-radius:10px}
.topbar .t{font-weight:700;font-size:1.05rem;line-height:1.2}
.topbar .t small{display:block;font-weight:400;color:var(--muted);font-size:.8rem}
nav.chips{display:flex;gap:8px;overflow-x:auto;padding:6px 14px 10px;max-width:1100px;margin:auto;scrollbar-width:none}
nav.chips::-webkit-scrollbar{display:none}
nav.chips a{flex:0 0 auto;text-decoration:none;color:var(--ink);background:#fff;border:2px solid var(--line);padding:7px 14px;border-radius:999px;font-size:.92rem;font-weight:600}
nav.chips a.on{background:var(--acc);border-color:var(--acc);color:#fff}
main{max-width:1100px;margin:auto;padding:14px}
section.page{display:none;animation:fade .35s ease}
section.page.on{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.hero{background:linear-gradient(135deg,#ffe8d6,#fdf1dc 55%,#e6f2ec);border-radius:28px;padding:18px;display:grid;gap:14px;align-items:center}
@media(min-width:800px){.hero{grid-template-columns:1.1fr 1fr;padding:28px}}
.hero h1{margin:0;font-size:1.9rem;line-height:1.25}
.hero p{margin:.4em 0;color:#5c4a40}
.hero img{width:100%;border-radius:20px;box-shadow:0 10px 30px rgba(120,70,40,.18)}
.grid{display:grid;gap:14px;margin-top:16px}
@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.grid{grid-template-columns:1fr 1fr 1fr}}
.card{background:var(--card);border-radius:var(--r);padding:16px 18px;box-shadow:0 4px 16px rgba(120,70,40,.08);border:1px solid var(--line)}
a.stcard{display:block;text-decoration:none;color:inherit;transition:transform .15s}
a.stcard:hover{transform:translateY(-3px)}
.stcard .em{font-size:2.1rem}
.stcard h3{margin:.2em 0}
.stcard p{margin:0;color:var(--muted);font-size:.95rem}
h2{font-size:1.55rem;margin:.2em 0 .4em}
h3{font-size:1.2rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:52px;padding:10px 20px;border-radius:16px;border:0;background:var(--acc);color:#fff;font:inherit;font-weight:700;font-size:1.02rem;cursor:pointer;text-decoration:none;box-shadow:0 3px 0 rgba(0,0,0,.12)}
.btn.alt{background:var(--acc2)}
.btn.soft{background:#fff;color:var(--ink);border:2px solid var(--line);box-shadow:none}
.btn.sun{background:var(--sun);color:var(--ink)}
.btn.big{min-height:64px;font-size:1.15rem;padding:14px 26px;border-radius:20px}
.btn:active{transform:translateY(2px)}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:10px 0}
.sthead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.fsbtn{flex:0 0 auto;min-height:44px;padding:6px 12px;font-size:.9rem}
.timer{font-variant-numeric:tabular-nums;font-size:1.6rem;font-weight:800;background:#fff;border:2px solid var(--line);border-radius:14px;padding:4px 14px;min-width:96px;text-align:center}
.note{background:#fff4e0;border-right:6px solid var(--sun);border-radius:14px;padding:10px 14px;margin:10px 0}
.tip{background:#e9f5ef;border-right:6px solid var(--sage);border-radius:14px;padding:10px 14px;margin:10px 0}
.reveal{display:none;background:#eef6f6;border-radius:18px;padding:14px 16px;margin-top:12px;border:2px dashed #b9d9d9}
.reveal.on{display:block;animation:fade .3s}
.seg{display:inline-flex;background:#fff;border:2px solid var(--line);border-radius:16px;overflow:hidden}
.seg button{border:0;background:none;font:inherit;padding:10px 16px;min-height:48px;cursor:pointer;font-weight:600;color:var(--ink)}
.seg button.on{background:var(--acc2);color:#fff}
/* dyslexia passage */
.dys{background:#fffdf8;border-radius:20px;padding:26px 18px;border:1px solid var(--line);line-height:2.6;font-size:1.25rem;word-spacing:.15em;overflow-wrap:break-word;min-height:200px}
.dys .w{display:inline-block;transition:transform .55s ease,letter-spacing .55s ease,font-size .55s ease;white-space:nowrap}
.dys .w.serif{font-family:"Frank Ruhl Libre","David","Times New Roman",serif}
.dys .w .m{display:inline-block;transform:scaleX(-1)}
.dys.plain{line-height:1.9;font-size:1.25rem}
.dys.plain .w{transform:none!important;font-size:1em!important;letter-spacing:0!important;font-family:inherit!important;margin:0!important}
.plaintext{display:none;background:#fff;border-radius:18px;padding:18px;border:2px solid var(--sage);font-size:1.15rem;line-height:1.9}
.plaintext.on{display:block}
input[type=range]{width:180px;accent-color:var(--acc)}
.q{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px 14px;margin:10px 0}
.q .opts{display:grid;gap:8px;margin-top:8px}
.q .opts button{text-align:right;font:inherit;padding:10px 14px;min-height:48px;border-radius:12px;border:2px solid var(--line);background:#fffaf3;cursor:pointer}
.q .opts button.ok{background:#dff1e6;border-color:var(--sage)}
.q .opts button.no{background:#fde4dc;border-color:var(--acc)}
.q .fb{font-size:.92rem;color:var(--muted);margin-top:6px;min-height:1em}
canvas.mirror{width:100%;max-width:560px;aspect-ratio:1/1;background:#fff;border-radius:18px;border:2px solid var(--line);touch-action:none;display:block;margin:auto}
/* attention */
.attwrap{position:relative;overflow:hidden;border-radius:20px}
.atttext{background:#fffdf8;border:1px solid var(--line);border-radius:20px;padding:20px;font-size:1.15rem;line-height:1.95;transition:filter .3s}
.atttext.blur{filter:blur(1.6px)}
.floater{position:absolute;font-size:2rem;pointer-events:none;z-index:3;transition:transform 4s linear,opacity .5s}
.notif{position:absolute;top:10px;left:10px;background:#333;color:#fff;border-radius:14px;padding:8px 12px;font-size:.9rem;z-index:4;box-shadow:0 6px 18px rgba(0,0,0,.25);animation:pop .3s}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:none;opacity:1}}
.flash{animation:flash .5s}
@keyframes flash{50%{background:#fff0a8}}
/* calc */
.calc{display:grid;gap:12px}
.prob{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.expr{font-size:2.1rem;font-weight:700;direction:ltr;unicode-bidi:isolate;letter-spacing:.06em;min-width:220px}
.expr .d{display:inline-block;transition:transform .4s}
.expr .mir{transform:scaleX(-1)}
.expr .rot{transform:rotate(180deg)}
.expr .up{transform:translateY(-.25em)}
.expr .dn{transform:translateY(.25em)}
.prob input{font:inherit;font-size:1.3rem;width:110px;min-height:52px;border-radius:12px;border:2px solid var(--line);text-align:center;direction:ltr}
.prob .res{font-weight:700}
/* speed */
.instr{font-size:1.25rem;background:#fff;border:3px solid var(--acc2);border-radius:20px;padding:18px;line-height:1.8}
.shapes{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:520px;margin:12px auto}
.shapes button{aspect-ratio:1/1;border:2px solid var(--line);background:#fff;border-radius:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:2.2rem;padding:0}
.shapes button.picked{outline:4px solid var(--acc);}
.shapes button .ord{position:absolute}
.bar{height:10px;background:var(--line);border-radius:10px;overflow:hidden;margin:8px 0}
.bar i{display:block;height:100%;background:var(--acc);width:100%;transition:width linear}
ul.clean{padding-right:1.2em}
ul.clean li{margin:.35em 0}
.acc{display:grid;gap:12px}
@media(min-width:700px){.acc{grid-template-columns:1fr 1fr}}
.acc .card h3{margin:.1em 0 .3em}
details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 14px;margin:8px 0}
details summary{cursor:pointer;font-weight:700;min-height:36px}
.timeline{display:grid;gap:8px}
.timeline div{display:flex;gap:12px;background:#fff;border-radius:14px;padding:10px 12px;border:1px solid var(--line)}
.timeline b{flex:0 0 76px;color:var(--acc);direction:ltr;text-align:right}
.illus{width:100%;max-width:520px;border-radius:20px;display:block;margin:10px auto;box-shadow:0 8px 24px rgba(120,70,40,.14)}
footer{text-align:center;color:var(--muted);font-size:.85rem;padding:24px 14px 40px;border-top:1px solid var(--line);margin-top:30px}
/* fullscreen */
section.page:fullscreen{background:var(--bg);overflow:auto;padding:24px;font-size:1.25em}
section.page.pseudofs{position:fixed;inset:0;z-index:100;background:var(--bg);overflow:auto;padding:18px;font-size:1.1em}
section.page:fullscreen .dys,section.page.pseudofs .dys{font-size:1.6rem}
.big-pdf{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}