/* Folio TFL-30. Instrument Sheet chassis, accent #245E5A (inkwell teal). */
:root{
  --paper:#EDE9E2;
  --ink:#1E1D1B;
  --panel:#DEDACF;
  --line:#B7B0A2;
  --chassis:#2A2924;
  --accent:#245E5A;
  --on-accent:#EDE9E2;
  --bad:#A5402E;
  --gold:#B98A2E;
  --font-ui:"Familjen Grotesk",system-ui,sans-serif;
  --font-spec:"Martian Mono",ui-monospace,monospace;
  --font-book:"Newsreader","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --ease:cubic-bezier(.2,.8,.2,1);
}
@media (prefers-color-scheme:dark){
  :root{--paper:#1E1D1B;--ink:#EDE9E2;--panel:#2A2924;--line:#4A473F;--chassis:#111;--accent:#3E8C86;--on-accent:#111;--bad:#D0664F;--gold:#D2A44A}
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-ui);font-size:1rem;line-height:1.55;overflow-x:hidden}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button{font:inherit;color:inherit}
h1,h2,h3,p,dl,dd,ol,ul,figure,pre,fieldset,blockquote{margin:0}
ol,ul{padding:0;list-style:none}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* label strip */
.strip{max-width:1120px;margin:0 auto;padding:18px 32px 0;display:flex;justify-content:space-between;align-items:baseline;font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;border-bottom:1px solid var(--line)}
.strip-maker{text-decoration:none;padding-bottom:12px}
.strip-maker:hover{text-decoration:underline;text-underline-offset:3px}
.strip-code{padding-bottom:12px}

/* page */
.wrap{max-width:1120px;margin:0 auto;padding:40px 32px 0}
.title{font-size:4rem;font-weight:600;line-height:1;letter-spacing:-.01em;margin-bottom:16px}
.lede{font-size:1.125rem;max-width:62ch;margin-bottom:28px}
.lede strong{font-weight:600}
.subhead{font-size:1.375rem;font-weight:500;line-height:1.25;margin-bottom:12px}
.note{max-width:66ch;margin-bottom:12px}
.reading{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;white-space:pre;margin:12px 0 0}

/* the hero panel: paper, one rule, accent ticks. The app lives inside. */
.hero{position:relative;border:1px solid var(--line);background:var(--paper)}
.hero::before,.hero::after,.hero>.ticks::before,.hero>.ticks::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--accent);pointer-events:none;z-index:3}
.hero::before{top:-1px;left:-1px;border-top-width:2px;border-left-width:2px}
.hero::after{top:-1px;right:-1px;border-top-width:2px;border-right-width:2px}
.hero>.ticks::before{bottom:-1px;left:-1px;border-bottom-width:2px;border-left-width:2px}
.hero>.ticks::after{bottom:-1px;right:-1px;border-bottom-width:2px;border-right-width:2px}
.app{position:relative;min-height:560px}
.app-loading{padding:40px;font-family:var(--font-spec);font-size:.75rem}
.confetti{position:absolute;inset:0;pointer-events:none;z-index:4}

/* buttons (paper chassis) */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font-weight:500;line-height:1.2;cursor:pointer;border-radius:0;text-decoration:none}
.btn:hover{background:var(--panel)}
.btn:disabled{opacity:.45;cursor:default}
.btn-accent{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}
.btn-accent:hover{background:var(--accent);filter:brightness(1.08)}
.btn-ink{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn-ink:hover{background:var(--ink)}
.btn-small{padding:8px 12px;font-size:.9375rem}
.btn-ghost{border-color:var(--line)}

/* ---------- HOME ---------- */
.home{display:grid;grid-template-columns:minmax(0,1fr) 320px;min-height:560px}
.path{padding:28px 32px 32px;border-right:1px solid var(--line)}
.path-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:18px}
.path-head .subhead{margin:0}
.unit{display:grid;grid-template-columns:44px minmax(0,1fr);gap:0 16px;padding:14px 0;border-top:1px solid var(--line)}
.unit:first-of-type{border-top:0}
.unit-n{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;padding-top:6px}
.unit-name{font-size:1.25rem;font-weight:500;line-height:1.2}
.unit-words{font-family:var(--font-book);font-size:1.0625rem;line-height:1.4;color:var(--ink);opacity:.8;margin:4px 0 10px;max-width:60ch}
.unit-words i{font-style:italic}
.nodes{display:flex;flex-wrap:wrap;gap:8px}
.node{position:relative;display:inline-flex;align-items:center;gap:8px;padding:9px 12px 9px 10px;border:1px solid var(--ink);background:var(--paper);cursor:pointer;line-height:1;font-weight:500;box-shadow:0 3px 0 var(--ink);transition:transform .08s var(--ease),box-shadow .08s var(--ease)}
.node:hover{background:var(--panel)}
.node:active{transform:translateY(3px);box-shadow:0 0 0 var(--ink)}
.node i{display:block;width:12px;height:12px;border:1px solid var(--ink);background:var(--paper)}
.node.is-done i{background:var(--accent);border-color:var(--accent)}
.node.is-next{border-color:var(--accent);box-shadow:0 3px 0 var(--accent);color:var(--accent)}
.node.is-next i{border-color:var(--accent)}
.node.is-locked{opacity:.5;box-shadow:none;border-color:var(--line);cursor:default}
.node.is-locked i{border-color:var(--line)}
.node-review{border-style:dashed}
.node-mock{margin-left:auto}
.unit.is-locked .unit-name,.unit.is-locked .unit-words{opacity:.55}
.unit.is-complete .unit-n{color:var(--accent)}
.path-more{margin-top:16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}

.dash{padding:28px 28px 32px;display:flex;flex-direction:column;gap:22px;background:var(--panel)}
.dash-block{display:grid;gap:6px}
.dash-label{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em}
.dash-big{font-size:3rem;font-weight:600;line-height:1;letter-spacing:-.01em;display:flex;align-items:baseline;gap:10px}
.dash-big small{font-size:1rem;font-weight:500;letter-spacing:0}
.dash-sub{font-size:.9375rem;opacity:.85}
.goal{position:relative;height:10px;background:var(--paper);border:1px solid var(--line)}
.goal b{position:absolute;inset:0 auto 0 0;width:0;background:var(--accent);transition:width .6s var(--ease)}
.goal.is-met b{background:var(--gold)}
.flame{display:inline-block;width:.75em;height:.95em;vertical-align:-.08em}
.flame path{fill:var(--gold)}
.dash-big.is-cold .flame path{fill:var(--line)}
.week{display:flex;gap:4px}
.week i{flex:1;height:22px;border:1px solid var(--line);background:var(--paper);display:flex;align-items:flex-end;justify-content:center;font-family:var(--font-spec);font-size:.6rem;font-weight:500;line-height:1;padding-bottom:3px;opacity:.7}
.week i.is-hit{background:var(--accent);border-color:var(--accent);color:var(--on-accent);opacity:1}
.week i.is-today{border-color:var(--ink);opacity:1}
.dash-actions{display:grid;gap:8px}
.dash-actions .btn{justify-content:flex-start}
.dash-foot{font-size:.875rem;opacity:.8;margin-top:auto}
.dash-foot button{background:none;border:0;padding:0;text-decoration:underline;text-underline-offset:3px;cursor:pointer;font-size:inherit}
.mute{display:inline-flex;align-items:center;gap:6px}

/* ---------- LESSON ---------- */
.lesson{display:flex;flex-direction:column;min-height:560px}
.lbar{background:var(--accent);color:var(--on-accent);display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px;padding:12px 16px}
.lbar-x{width:36px;height:36px;border:1px solid var(--on-accent);background:none;color:inherit;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:1.25rem;line-height:1}
.lbar-x:hover{background:rgba(255,255,255,.12)}
.lbar-x:focus-visible{outline-color:var(--on-accent)}
.prog{position:relative;height:12px;border:1px solid var(--on-accent);background:transparent}
.prog b{position:absolute;inset:0 auto 0 0;width:0;background:var(--on-accent);transition:width .45s var(--ease)}
.lbar-r{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;white-space:pre;text-align:right}
.combo{display:inline-block;transition:transform .2s var(--ease)}
.combo.is-hot{color:#F6D67A;transform:scale(1.15)}
@media (prefers-color-scheme:dark){.combo.is-hot{color:#111}}

.stage{flex:1;padding:24px 32px 24px;display:grid;gap:18px;align-content:start;max-width:820px;width:100%;margin:0 auto}
.stage.is-in{animation:stage-in .32s var(--ease)}
@keyframes stage-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.prompt{font-size:1.375rem;font-weight:500;line-height:1.25}
.prompt em{font-style:normal;color:var(--accent)}
.tag{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em}

/* the plate: illustration above the passage, like a plate in an old edition */
.plate{display:grid;grid-template-columns:minmax(0,1fr);border:1px solid var(--line)}
.plate-img{position:relative;aspect-ratio:3/2;background:var(--panel);overflow:hidden}
.plate-img img{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .5s var(--ease)}
.plate-img img.is-ready{opacity:1}
.plate-img svg{position:absolute;inset:0;width:100%;height:100%}
.plate-img .plate-initial{font-family:var(--font-book);font-size:96px;fill:var(--line);font-style:italic}
.plate-body{padding:20px 24px 18px;background:var(--paper)}
.passage{font-family:var(--font-book);font-size:1.25rem;line-height:1.6;max-width:62ch;font-weight:400}
.passage mark{background:none;color:var(--accent);font-weight:500;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--accent)}
.passage.is-cloze mark{color:inherit;text-decoration:none;border-bottom:2px solid var(--ink);padding:0 4px;min-width:5ch;display:inline-block;text-align:center;font-style:italic}
.passage.is-cloze mark.is-filled{color:var(--accent);font-style:normal}
.src{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;margin-top:12px;display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center}
.src button{background:none;border:0;padding:0;font:inherit;text-decoration:underline;text-underline-offset:3px;cursor:pointer;color:inherit;opacity:.8}
.src button:hover{opacity:1}
.gloss{font-size:1rem;padding:12px 14px;background:var(--panel);border-left:3px solid var(--accent)}
@media (min-width:900px){
  .plate{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
  .plate.is-bare{grid-template-columns:1fr}
  .plate-img{aspect-ratio:auto;min-height:280px;border-right:1px solid var(--line)}
  .plate-body{padding:24px 28px}
}

/* answer keys: the physical interaction. One flat edge, it presses down. */
.keys{display:grid;gap:10px}
.keys.is-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.key{position:relative;display:grid;grid-template-columns:28px minmax(0,1fr);align-items:center;gap:12px;text-align:left;padding:13px 14px;border:1px solid var(--ink);background:var(--paper);cursor:pointer;line-height:1.3;box-shadow:0 4px 0 var(--ink);transition:transform .08s var(--ease),box-shadow .08s var(--ease),background .15s}
.key:hover{background:var(--panel)}
.key:active,.key.is-picked{transform:translateY(4px);box-shadow:0 0 0 var(--ink)}
.key.is-picked{background:var(--panel);border-color:var(--accent)}
.key kbd{font-family:var(--font-spec);font-size:.75rem;font-weight:500;width:28px;height:28px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;background:var(--paper)}
.key.is-picked kbd{border-color:var(--accent);color:var(--accent)}
.key.is-right{border-color:var(--accent);background:var(--accent);color:var(--on-accent);box-shadow:0 0 0 var(--accent);transform:translateY(4px)}
.key.is-right kbd{border-color:var(--on-accent);background:transparent;color:inherit}
.key.is-wrong{border-color:var(--bad);color:var(--bad);box-shadow:0 0 0 var(--bad);transform:translateY(4px);animation:shake .35s var(--ease)}
.key.is-wrong kbd{border-color:var(--bad);color:var(--bad)}
.key:disabled{cursor:default}
.key:disabled:not(.is-right):not(.is-wrong){opacity:.55}
.key.is-word{font-family:var(--font-book);font-size:1.25rem}
@keyframes shake{20%{transform:translate(-5px,4px)}40%{transform:translate(5px,4px)}60%{transform:translate(-3px,4px)}80%{transform:translate(3px,4px)}}

/* meet the word */
.meet{display:grid;gap:14px;padding:26px 28px;border:1px solid var(--line);background:var(--panel)}
.meet-word{font-size:clamp(2.5rem,7vw,4rem);font-weight:600;line-height:1;letter-spacing:-.01em}
.meet-pos{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em}
.meet-def{font-size:1.25rem;line-height:1.4;max-width:56ch}
.meet-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.chip{display:inline-block;padding:5px 10px;border:1px solid var(--ink);background:var(--paper);font-weight:500;line-height:1.2}
.meet-ex{font-family:var(--font-book);font-size:1.125rem;font-style:italic;max-width:60ch}
.meet-hook{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:start;padding-top:12px;border-top:1px solid var(--line);max-width:60ch}
.meet-hook svg{width:20px;height:20px;margin-top:2px}
.meet-hook svg path{stroke:var(--accent);stroke-width:1.6;fill:none}

/* type the word */
.type-in{width:100%;padding:16px 18px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font:inherit;font-family:var(--font-book);font-size:1.75rem;line-height:1.2;border-radius:0;letter-spacing:.02em}
.type-in:focus{outline:2px solid var(--accent);outline-offset:0}
.type-in.is-right{border-color:var(--accent);color:var(--accent)}
.type-in.is-wrong{border-color:var(--bad);color:var(--bad);animation:shake .35s var(--ease)}
.type-hint{font-family:var(--font-spec);font-size:.75rem;letter-spacing:.02em;min-height:1.2em}

/* match pairs */
.match{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px}
.match .key{grid-template-columns:minmax(0,1fr)}
.match .key.is-gone{visibility:hidden}
.match .key.is-def{font-size:.9375rem}

/* dock: the bottom bar that turns into the verdict */
.dock{border-top:1px solid var(--line);padding:16px 32px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;background:var(--paper);min-height:84px}
.dock.is-good{background:var(--accent);color:var(--on-accent);border-top-color:var(--accent)}
.dock.is-bad{background:var(--bad);color:#fff;border-top-color:var(--bad)}
.dock-msg{display:grid;gap:2px;min-width:0}
.dock-msg b{font-size:1.25rem;font-weight:600;line-height:1.2}
.dock-msg span{font-size:.9375rem;line-height:1.35;max-width:70ch}
.dock .btn{min-width:160px}
.dock.is-good .btn,.dock.is-bad .btn{background:var(--paper);border-color:var(--paper);color:var(--ink)}
.dock.is-bad .btn{color:var(--bad)}
.dock-flag{background:none;border:0;padding:0;font-size:.8125rem;text-decoration:underline;text-underline-offset:3px;cursor:pointer;color:inherit;opacity:.85;justify-self:start}

/* result */
.result{padding:40px 32px;display:grid;gap:24px;max-width:720px;margin:0 auto;text-align:left;width:100%}
.result-title{font-size:2.5rem;font-weight:600;line-height:1;letter-spacing:-.01em}
.result-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line)}
.result-grid div{padding:16px;border-right:1px solid var(--line)}
.result-grid div:last-child{border-right:0}
.result-grid b{display:block;font-size:2.25rem;font-weight:600;line-height:1;letter-spacing:-.01em;margin-bottom:6px}
.result-grid b.is-gold{color:var(--gold)}
.result-grid span{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em}
.result-words{display:flex;flex-wrap:wrap;gap:8px}
.result-words .chip.is-weak{border-color:var(--bad);color:var(--bad)}
.result-actions{display:flex;flex-wrap:wrap;gap:10px}

/* mock section */
.timer{font-family:var(--font-spec);font-size:.75rem;letter-spacing:.02em}
.timer.is-low{color:#F6D67A}

/* ---------- bench / index / sources ---------- */
.bench{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:40px}
.panel{padding:24px 28px 26px;border:1px solid var(--line);background:var(--panel)}
.how{display:grid;gap:10px;counter-reset:how}
.how li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;counter-increment:how}
.how li::before{content:counter(how);font-family:var(--font-spec);font-size:.75rem;font-weight:500;padding-top:5px}
.how b{font-weight:600}
.index{margin-top:40px}
.index-q{width:100%;max-width:480px;padding:12px 14px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font:inherit;border-radius:0;margin:6px 0 16px}
.index-list{columns:3;column-gap:28px;font-size:.9375rem}
.index-list li{break-inside:avoid;padding:6px 0;border-top:1px solid var(--line)}
.index-list b{font-weight:600}
.index-list i{font-family:var(--font-spec);font-style:normal;font-size:.65rem;letter-spacing:.02em;margin:0 6px 0 4px;opacity:.75}
.index-list li.is-known b{color:var(--accent)}
.index-list li[hidden]{display:none}
.sources{margin-top:40px}
.books{columns:3;column-gap:28px;font-size:.9375rem}
.books li{break-inside:avoid;padding:5px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px}
.books li span{font-family:var(--font-spec);font-size:.7rem;opacity:.75;white-space:nowrap}
.books li i{font-style:normal;opacity:.75}

/* funnel + footer */
#funnel{margin-top:48px}
.foot{max-width:1120px;margin:40px auto 0;padding:20px 32px 40px;border-top:1px solid var(--line);font-size:.875rem;opacity:.85;max-width:1120px}
.foot p{max-width:80ch}

@media (max-width:960px){
  .home{grid-template-columns:1fr}
  .path{border-right:0;border-bottom:1px solid var(--line)}
  .dash{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .dash-actions,.dash-foot{grid-column:span 2}
  .bench{grid-template-columns:1fr}
  .index-list,.books{columns:2}
}
@media (max-width:640px){
  .strip{padding:14px 16px 0}
  .wrap{padding:28px 16px 0}
  .title{font-size:2.5rem}
  .lede{font-size:1rem}
  .path{padding:20px 16px 22px}
  .unit{grid-template-columns:1fr;gap:4px}
  .unit-n{padding-top:0}
  .dash{padding:20px 16px 22px;grid-template-columns:1fr}
  .dash-actions,.dash-foot{grid-column:span 1}
  .stage{padding:18px 16px}
  .plate-body{padding:16px 16px 14px}
  .passage{font-size:1.125rem}
  .prompt{font-size:1.2rem}
  .keys.is-two{grid-template-columns:1fr}
  .meet{padding:20px 16px}
  .dock{padding:12px 16px;grid-template-columns:1fr;gap:10px}
  .dock .btn{width:100%}
  .result{padding:28px 16px}
  .result-grid{grid-template-columns:1fr}
  .result-grid div{border-right:0;border-bottom:1px solid var(--line)}
  .result-grid div:last-child{border-bottom:0}
  .panel{padding:20px 16px 22px}
  .index-list,.books{columns:1}
  .match{gap:8px 10px}
  .foot{padding:16px 16px 32px}
  .lbar-r{font-size:.65rem}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}