/* Layout: one narrow column. Sticky tab bar on top, home grid of five skill cards, each skill is a stepper of short activities.
   Tokens: paper (page), surface (cards), ink, muted, line, plus one colour per skill and a bun/patty pair for the hamburger. */
:root{
  --bg:#eaf0f7; --surface:#ffffff; --ink:#16233a; --muted:#51627c; --line:#cbd6e5;
  --brand:#1d4e89; --on-c:#ffffff; --ok:#17794a; --bad:#b83225; --warn:#8a5a00;
  --c-fan:#2260b0; --c-adv:#0b7a7a; --c-sub:#a8480f; --c-mod:#7040a8; --c-ham:#3a7326; --c-qa:#a02a62; --c-gen:#8a6400; --c-dev:#b0283f; --c-str:#5f7000; --c-uns:#1f3a8a;
  --bun:#d9983a; --patty:#6b3a22; --leaf:#5a9a3a;
  --font-display:"Fredoka","Trebuchet MS",system-ui,sans-serif;
  --font-body:"Lexend","Segoe UI",system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e1626; --surface:#17223a; --ink:#e8eef9; --muted:#a2b2cb; --line:#2c3c5a;
    --brand:#7fb2f0; --on-c:#0e1626; --ok:#63d594; --bad:#ff8c7d; --warn:#f0c060;
    --c-fan:#76adf2; --c-adv:#55c9c9; --c-sub:#f2a06b; --c-mod:#bc9bf0; --c-ham:#93d674; --c-qa:#f08ab8; --c-gen:#e6c050; --c-dev:#ff8fa3; --c-str:#c4d65a; --c-uns:#8fb0ff;
    --bun:#d9983a; --patty:#b86a46; --leaf:#7cc058; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e1626; --surface:#17223a; --ink:#e8eef9; --muted:#a2b2cb; --line:#2c3c5a;
  --brand:#7fb2f0; --on-c:#0e1626; --ok:#63d594; --bad:#ff8c7d; --warn:#f0c060;
  --c-fan:#76adf2; --c-adv:#55c9c9; --c-sub:#f2a06b; --c-mod:#bc9bf0; --c-ham:#93d674; --c-qa:#f08ab8; --c-gen:#e6c050; --c-dev:#ff8fa3; --c-str:#c4d65a; --c-uns:#8fb0ff;
  --bun:#d9983a; --patty:#b86a46; --leaf:#7cc058; color-scheme:dark;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.55;padding-inline:16px;padding-block:0 3rem}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance;line-height:1.2;margin:0}
p{margin:0 0 .7rem}
button,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
.wrap{max-width:820px;margin-inline:auto}
.bar{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--bg);padding-block:.6rem;border-bottom:1px solid var(--line);margin-inline:-16px;padding-inline:16px}
.tabs{display:flex;gap:.4rem;overflow-x:auto;padding-bottom:2px;max-width:820px;margin-inline:auto}
.tab{flex:none;border:1.5px solid var(--line);background:var(--surface);border-radius:999px;padding:.35rem .85rem;font-size:.9rem;font-weight:500;min-height:40px}
.tab[aria-current="page"]{background:var(--tc,var(--brand));border-color:var(--tc,var(--brand));color:var(--on-c)}
.hero{padding-block:1.6rem 1rem}
h2.wk{font-size:1.15rem;color:var(--muted);margin-block:1.4rem .5rem}
.hero h1{font-size:clamp(2rem,6vw,2.8rem);font-weight:700}
.hero p{color:var(--muted);max-width:56ch;margin-top:.5rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:.9rem;margin-top:.5rem}
.card{background:var(--surface);border:1.5px solid var(--line);border-radius:14px;padding:1rem 1.1rem;min-width:0}
.skill{display:flex;flex-direction:column;gap:.5rem;text-align:left;width:100%;border-top:6px solid var(--c);cursor:pointer}
.skill:hover{border-color:var(--c)}
.skill h3{font-size:1.25rem;color:var(--c)}
.skill small{color:var(--muted);font-size:.85rem}
.skill.big{grid-column:1/-1;background:color-mix(in srgb,var(--c) 10%,var(--surface))}
.meter{height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.meter i{display:block;height:100%;background:var(--c);width:0;transition:width .3s}
.sec{--c:var(--brand);--tint:color-mix(in srgb,var(--c) 11%,var(--surface))}
.sechead{padding-block:1.3rem .6rem}
.sechead h2{font-size:clamp(1.6rem,5vw,2.2rem);color:var(--c)}
.learn{background:var(--tint);border:1.5px solid color-mix(in srgb,var(--c) 40%,var(--line));border-radius:14px;padding:.2rem 1rem;margin-block:.4rem 1rem}
.learn summary{font-family:var(--font-display);font-weight:600;font-size:1.1rem;cursor:pointer;padding-block:.6rem;color:var(--c)}
.learn .in{padding-bottom:.8rem}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-block:.4rem}
.chip{background:var(--surface);border:1.5px solid var(--c);color:var(--ink);border-radius:8px;padding:.15rem .6rem;font-weight:600}
.kv{display:grid;grid-template-columns:auto 1fr;gap:.25rem .8rem;margin-block:.4rem}
.kv b{color:var(--c)}
.rule{border-left:5px solid var(--c);background:var(--surface);padding:.5rem .8rem;border-radius:0 10px 10px 0;margin-block:.6rem}
.steps{display:flex;gap:.4rem;flex-wrap:wrap;margin-block:.6rem}
.dot{min-width:42px;min-height:42px;border-radius:50%;border:2px solid var(--line);background:var(--surface);font-weight:600}
.dot.done{background:color-mix(in srgb,var(--c) 22%,var(--surface));border-color:var(--c)}
.dot.star2{background:var(--c);color:var(--on-c);border-color:var(--c)}
.dot[aria-current="step"]{outline:3px solid var(--c);outline-offset:2px}
.act{background:var(--surface);border:1.5px solid var(--line);border-radius:14px;padding:1rem 1.1rem}
.act .prompt{font-weight:500;font-size:1.05rem}
.badge{display:inline-block;background:var(--c);color:var(--on-c);font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:.1rem .5rem;border-radius:6px;margin-right:.4rem;vertical-align:middle}
.pitem,.witem{padding-block:.7rem;border-top:1px dashed var(--line)}
.pitem:first-of-type,.witem:first-of-type{border-top:0}
.slot{display:inline-block;min-width:4.5em;border-bottom:3px solid var(--c);text-align:center;font-weight:700;color:var(--c)}
.opts{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.5rem}
.opt{border:2px solid var(--line);background:var(--surface);border-radius:10px;padding:.4rem .8rem;min-height:44px;text-align:left}
.opt[aria-pressed="true"]{border-color:var(--c);background:var(--tint);font-weight:600}
.opt.good{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 16%,var(--surface))}
.opt.bad{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 14%,var(--surface))}
.fb{margin-top:.4rem;font-size:.94rem}
.fb.good{color:var(--ok)} .fb.bad{color:var(--bad)}
.tokens{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.4rem;font-size:1.05rem}
.tok{border:2px solid transparent;background:transparent;border-radius:8px;padding:.2rem .35rem;min-height:40px}
.tok:hover{background:var(--tint)}
.tok[aria-pressed="true"]{background:var(--tint);border-color:var(--c);font-weight:600}
.tok.good{background:color-mix(in srgb,var(--ok) 20%,var(--surface));border-color:var(--ok)}
.tok.bad{background:color-mix(in srgb,var(--bad) 16%,var(--surface));border-color:var(--bad)}
.tok.miss{border:2px dashed var(--ok)}
.gap{width:22px;min-height:40px;border:2px dashed var(--line);background:transparent;border-radius:6px;font-weight:700;color:var(--c);padding:0}
.gap[aria-pressed="true"]{background:var(--tint);border:2px solid var(--c)}
.gap.good{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 20%,var(--surface))}
.gap.bad{border-color:var(--bad)}
.sortrow{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;padding-block:.45rem;border-top:1px dashed var(--line)}
.sortrow:first-of-type{border-top:0}
.sortrow .t{flex:1 1 9rem;font-weight:600;min-width:0}
.given{background:var(--tint);border-radius:10px;padding:.5rem .8rem;margin-block:.3rem;font-weight:500}
.wlabel{font-weight:600;color:var(--c)}
textarea{width:100%;border:2px solid var(--line);border-radius:10px;padding:.6rem .7rem;background:var(--surface);resize:vertical;min-height:3.2rem;line-height:1.5}
textarea:focus-visible{border-color:var(--c)}
.rules{list-style:none;margin:.4rem 0 0;padding:0;font-size:.93rem}
.rules li{padding-left:1.5rem;position:relative;margin-block:.15rem}
.rules li::before{position:absolute;left:0;font-weight:700}
.rules .ok{color:var(--ok)} .rules .ok::before{content:"\2713"}
.rules .no{color:var(--bad)} .rules .no::before{content:"\2717"}
.rules .tip{color:var(--ink);padding-left:0;margin-top:.35rem}
.aibadge{font-size:.78rem;color:var(--muted);text-align:center;padding-top:.3rem}
.aibadge.on{color:var(--ok)} .aibadge.off{color:var(--warn)}
.btns{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.8rem}
.btn{border:2px solid var(--c);background:var(--c);color:var(--on-c);border-radius:10px;padding:.55rem 1.1rem;font-weight:600;min-height:46px}
.btn.alt{background:var(--surface);color:var(--c)}
.btn.quiet{border-color:var(--line);background:transparent;color:var(--muted);font-weight:500}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.ex{background:var(--tint);border-radius:10px;padding:.5rem .8rem;margin-top:.5rem;font-size:.94rem}
.small{font-size:.88rem;color:var(--muted)}
/* hamburger */
.burger{display:flex;flex-direction:column;gap:5px;max-width:420px;margin-block:.5rem 1rem}
.bl{padding:.55rem .9rem;border:2.5px dashed var(--line);color:var(--muted);font-weight:600;font-size:.92rem;transition:background .3s;text-align:center}
.bl.top{border-radius:46px 46px 10px 10px}
.bl.bot{border-radius:10px 10px 28px 28px}
.bl.fill{border-radius:12px}
.bl.on{border-style:solid;color:#fff;text-shadow:0 1px 1px rgba(0,0,0,.35)}
.bl.on.top,.bl.on.bot{background:var(--bun);border-color:var(--bun)}
.bl.on.fill{background:var(--leaf);border-color:var(--leaf)}
.bl.on.fill.p{background:var(--patty);border-color:var(--patty)}
.part{border-left:6px solid var(--line);padding:.3rem .8rem;margin-block:.5rem;border-radius:0 10px 10px 0}
.part.T,.part.C{border-color:var(--bun);background:color-mix(in srgb,var(--bun) 14%,var(--surface))}
.part.S{border-color:var(--leaf);background:color-mix(in srgb,var(--leaf) 14%,var(--surface))}
.part small{font-weight:700;letter-spacing:.05em;text-transform:uppercase;font-size:.72rem;color:var(--muted);display:block}
.meterchips{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.5rem;margin-block:.6rem}
.mc{border:2px solid var(--line);border-radius:12px;padding:.5rem .7rem;font-size:.9rem;min-width:0}
.mc.on{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 12%,var(--surface))}
.mc b{display:block}
.starters{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.35rem}
.starters button{border:1.5px solid var(--line);background:var(--surface);border-radius:8px;padding:.15rem .55rem;font-size:.85rem;min-height:34px}
.starters button:hover{border-color:var(--c)}
.topics{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.5rem;margin-block:.5rem}
.finalbox{border:2px solid var(--c);border-radius:12px;padding:.8rem 1rem;background:var(--tint);white-space:pre-wrap}
label.chk{display:flex;gap:.6rem;align-items:flex-start;padding-block:.25rem}
label.chk input{width:22px;height:22px;margin-top:.15rem;accent-color:var(--c)}
.rubric{display:grid;gap:.4rem;margin-block:.6rem}
.rrow{border:2px solid var(--line);border-radius:10px;padding:.45rem .7rem}
.rrow.s2{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,var(--surface))}
.rrow.s0{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 8%,var(--surface))}
.rn{display:flex;justify-content:space-between;gap:.5rem;flex-wrap:wrap;font-size:.92rem}
.rn span{color:var(--muted);font-size:.85rem}
.rc{font-size:.92rem;margin-top:.15rem}
.foot{margin-top:2rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}