/* Stapel: Vartakt-Stil. Schwarz/Weiß, klare Linien, Farbe als seltener Akzent. */
:root{
  --ink:#fff;--paper:#000;--raise:#0d0d0d;--soft:#151515;--line:#3d3d3d;--strong:#fff;--dim:#b4b4b4;
  --on:#000;--bad:#ff8a70;--ok:#9be27a;--warn:#ffc300;--mark:rgba(255,195,0,.26);
  --grad:linear-gradient(90deg,#ff5733,#ffc300,#daf7a6,#3498db);
  --display:"Big Shoulders Display","Arial Narrow",Impact,sans-serif;
  --body:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --scale:1;color-scheme:dark;
}
@media (prefers-color-scheme:light){:root:not([data-theme]){--ink:#000;--paper:#fff;--raise:#fafafa;--soft:#f2f2f2;--line:#9a9a9a;--strong:#000;--dim:#555;--on:#fff;--bad:#b3261e;--ok:#1d6b2c;--warn:#7a5a00;--mark:rgba(255,195,0,.4);color-scheme:light}}
:root[data-theme=light]{--ink:#000;--paper:#fff;--raise:#fafafa;--soft:#f2f2f2;--line:#9a9a9a;--strong:#000;--dim:#555;--on:#fff;--bad:#b3261e;--ok:#1d6b2c;--warn:#7a5a00;--mark:rgba(255,195,0,.4);color-scheme:light}
:root[data-size=large]{--scale:1.15}:root[data-size=xlarge]{--scale:1.3}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;font-size:calc(16px*var(--scale))}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1rem/1.6 var(--body);overscroll-behavior-y:none}
a{color:inherit;text-underline-offset:3px}
h1,h2,h3{margin:0;font-family:var(--display);text-transform:uppercase;letter-spacing:.01em;line-height:1;text-wrap:balance}
h1{font-size:clamp(2.6rem,9vw,4.4rem);font-weight:900}
h2{font-size:1.7rem;font-weight:700}
h3{font-size:1.25rem;font-weight:700}
p{margin:0 0 1rem}
:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
main:focus{outline:0}
h1:focus{outline:0}
img{max-width:100%;height:auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.skip{position:absolute;left:12px;top:-80px;background:var(--ink);color:var(--paper);padding:10px 14px;z-index:30;font-weight:600}
.skip:focus{top:10px}
.shell{min-height:100dvh;display:grid;grid-template-rows:auto 1fr;max-width:1120px;margin:0 auto;padding:0 max(16px,env(safe-area-inset-right)) calc(84px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--strong)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;min-height:44px}
.word{font:900 1.9rem/1 var(--display);text-transform:uppercase;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.mark{position:relative;width:26px;height:26px;display:block}
.mark i{position:absolute;inset:0 6px 6px 0;border:2px solid var(--ink);background:var(--paper)}
.mark i:nth-child(2){transform:translate(3px,3px)}.mark i:nth-child(3){transform:translate(6px,6px)}
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:15;display:grid;grid-template-columns:repeat(5,1fr);background:var(--paper);border-top:1px solid var(--strong);padding-bottom:env(safe-area-inset-bottom)}
.tabs a{display:grid;justify-items:center;gap:2px;padding:8px 2px;min-height:60px;text-decoration:none;font:500 .69rem var(--mono);color:var(--dim)}
.tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.tabs a[aria-current=page]{color:var(--ink);box-shadow:inset 0 3px 0 var(--ink)}
.tabs a:focus-visible{outline-offset:-4px}
#view{padding:24px 0 32px;min-width:0}
.loading{color:var(--dim)}
.lead{font-size:1.15rem;max-width:58ch;color:var(--dim)}
.eyebrow{display:block;font:600 .75rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stack{display:grid;gap:16px}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.between{justify-content:space-between}
.mt{margin-top:32px}
.small{font-size:.875rem;color:var(--dim)}
button,.btn{font:600 .85rem var(--mono);letter-spacing:.03em;min-height:44px;padding:0 16px;border:1px solid var(--strong);background:transparent;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;text-align:center;transition:background .15s,color .15s}
button:hover,.btn:hover{background:var(--ink);color:var(--paper)}
button:disabled{opacity:.45;cursor:not-allowed}
.primary{background:var(--ink);color:var(--paper)}
.primary:hover{background:var(--paper);color:var(--ink)}
.ghost{border-color:var(--line)}
.danger{border-color:var(--bad);color:var(--bad)}
.danger:hover{background:var(--bad);color:var(--paper)}
.big{font-size:1.05rem;min-height:58px;padding:0 28px;width:100%}
label,.label{display:block;font-weight:500;font-size:.9rem;margin-bottom:6px}
input[type=text],input[type=search],input[type=number],input[type=date],input[type=time],input:not([type]),select,textarea{width:100%;font:400 1rem/1.5 var(--body);color:var(--ink);background:var(--raise);border:1px solid var(--line);padding:10px 12px;min-height:44px;border-radius:0}
textarea{min-height:120px;resize:vertical}
input:hover,select:hover,textarea:hover{border-color:var(--strong)}
[aria-invalid=true]{border-color:var(--bad)}
.err{color:var(--bad);font-size:.875rem;margin:6px 0 0}
.hint{color:var(--dim);font-size:.85rem;margin:6px 0 0}
.check{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:400;margin:0}
.check input{width:22px;height:22px;accent-color:var(--ink);flex:none}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr));gap:16px}
.panel{border:1px solid var(--line);padding:18px}
.panel h2{margin-bottom:10px}
fieldset{border:0;padding:0;margin:0;min-width:0}
.seg{display:flex;flex-wrap:wrap}
.seg label{margin:0 -1px -1px 0}
.seg input{position:absolute;opacity:0;width:1px;height:1px}
.seg span{display:flex;align-items:center;justify-content:center;min-height:44px;padding:0 14px;border:1px solid var(--strong);font:600 .8rem var(--mono);cursor:pointer}
.seg input:checked+span{background:var(--ink);color:var(--paper)}
.seg input:focus-visible+span{outline:3px solid var(--ink);outline-offset:2px}

.hero{display:grid;gap:12px;padding:20px 0 24px}
.today{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--strong);margin:8px 0 12px}
.today div{padding:14px;border-right:1px solid var(--line)}.today div:last-child{border-right:0}
.today b{display:block;font:900 clamp(2rem,8vw,3.2rem)/1 var(--display)}
.today span{font-size:.8rem;color:var(--dim)}
.decks{list-style:none;margin:0;padding:0;display:grid;border-top:1px solid var(--strong)}
.decks li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px;align-items:center;border-bottom:1px solid var(--line);padding:14px 0}
.decks a.name{display:block;text-decoration:none;font:700 1.45rem/1.1 var(--display);text-transform:uppercase;min-height:28px;overflow-wrap:anywhere}
.decks a.name:hover{text-decoration:underline}
.meter{height:6px;background:var(--soft);margin-top:8px;max-width:320px}
.meter i{display:block;height:100%;background:var(--grad)}
.pill{display:inline-block;font:600 .72rem var(--mono);border:1px solid var(--line);padding:2px 7px;white-space:nowrap}
.notice{border:1px solid var(--warn);padding:12px 14px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:16px}
.notice p{margin:0}
.empty{border:1px dashed var(--line);padding:28px 20px;text-align:center}
.lib{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr));gap:12px;list-style:none;margin:0;padding:0}
.lib li{border:1px solid var(--line);padding:14px;display:grid;gap:8px;align-content:space-between}
.lib h3{font-size:1.2rem}
.lib p{margin:0;font-size:.875rem;color:var(--dim)}

.session{display:grid;gap:14px;max-width:760px;margin:0 auto}
.session-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.counts{font:600 .8rem var(--mono);display:flex;gap:12px;color:var(--dim);flex-wrap:wrap}
.bar{height:5px;background:var(--soft)}.bar i{display:block;height:100%;background:var(--grad);transition:width .2s}
.flash{perspective:1400px;display:grid;touch-action:pan-y}
.flip{display:grid;transform-style:preserve-3d;transition:transform .25s cubic-bezier(.2,.8,.2,1);will-change:transform}
.flash.shown .flip{transform:rotateY(180deg)}
.face{grid-area:1/1;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:1px solid var(--strong);background:var(--raise);min-height:clamp(260px,44dvh,440px);padding:26px 22px;display:grid;align-content:center;gap:6px;text-align:center;overflow-wrap:anywhere;overflow:auto}
.face.back{transform:rotateY(180deg)}
.flash:not(.shown) .face.back,.flash.shown .face.front{visibility:hidden;transition:visibility 0s .12s}
.tag{position:absolute;font:600 .7rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.card-body{font-size:clamp(1.3rem,4.5vw,1.85rem);line-height:1.35}
.card-body p{margin:0 0 .5em}.card-body p:last-child{margin:0}
.card-body ul,.card-body ol{text-align:left;display:inline-block;margin:0;padding-left:1.2em}
.card-body img{max-height:300px;margin:6px auto;display:block;background:#fff}
.card-body mark,.preview mark{background:var(--mark);color:inherit;padding:0 .15em}
.card-body code,.preview code{font:500 .9em var(--mono);background:var(--soft);padding:.1em .35em}
.say{justify-self:center;margin-top:10px}
.rate{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.rate button{display:grid;gap:0;padding:8px 2px;min-height:68px;font:600 .85rem var(--mono)}
.rate small{font:400 .72rem var(--mono);color:var(--dim)}
.rate button:hover small,.rate button.suggest small{color:inherit}
.rate button.suggest{background:var(--ink);color:var(--paper)}
.keys{font:400 .75rem var(--mono);color:var(--dim);text-align:center;margin:0}
.result{padding:12px 14px;border:1px solid var(--line)}
.result.right{border-color:var(--ok)}.result.close{border-color:var(--warn)}.result.wrong{border-color:var(--bad)}
.result b{display:block}
.answer-input{font-size:1.2rem!important;text-align:center}
.options{display:grid;gap:8px}
.options button{justify-content:flex-start;text-align:left;font:500 1rem/1.3 var(--body);padding:12px 14px;min-height:56px}
.options button kbd{font:600 .75rem var(--mono);color:var(--dim)}
.options button.is-right{border:3px solid var(--ok)}
.options button.is-wrong{border:3px solid var(--bad)}
.match{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.match button{font:500 .95rem/1.25 var(--body);padding:10px;min-height:68px;overflow-wrap:anywhere}
.match button[aria-pressed=true]{background:var(--ink);color:var(--paper)}
.match button.done{visibility:hidden}
.match button.miss{border-color:var(--bad);border-width:3px}
.done-card{text-align:center;display:grid;gap:12px;padding:20px 0}
.done-card b.num{font:900 clamp(3.4rem,14vw,6rem)/1 var(--display)}

.editor{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr));gap:20px}
.tools{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px}
.tools button{min-height:44px;min-width:44px;padding:0 10px}
.preview{border:1px solid var(--line);padding:14px;min-height:88px;overflow-wrap:anywhere}
.preview p{margin:0 0 .4em}.preview img{max-height:160px;background:#fff}
.toolbar{display:grid;grid-template-columns:minmax(0,2fr) repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:16px 0}
.cards{list-style:none;margin:0;padding:0;border-top:1px solid var(--strong)}
.cards li{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:8px;align-items:center;border-bottom:1px solid var(--line);padding:4px 0}
.cards .check{justify-content:center}
.cards a{display:block;text-decoration:none;padding:8px 0;overflow:hidden}
.cards a:hover b{text-decoration:underline}
.cards b{display:block;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cards span.sub{display:block;font-size:.85rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bulk{position:sticky;bottom:72px;z-index:5;background:var(--paper);border:1px solid var(--strong);padding:10px;margin-top:12px}
.table{overflow-x:auto;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;font-size:.9rem}
caption{text-align:left;padding:10px;font:600 .75rem var(--mono);color:var(--dim)}
th,td{padding:8px 10px;border-top:1px solid var(--line);text-align:left;vertical-align:top;overflow-wrap:anywhere}
th{font:600 .75rem var(--mono)}
td input[type=text]{min-width:150px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:0;border:1px solid var(--strong)}
.kpis div{padding:14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 -1px -1px 0}
.kpis b{display:block;font:900 2.4rem/1 var(--display)}
.kpis span{font-size:.8rem;color:var(--dim)}
.heat{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,clamp(9px,1.25vw,15px));grid-auto-columns:minmax(9px,1fr);gap:3px;overflow-x:auto;padding:6px 0}
.heat i{background:var(--soft)}
.heat i[data-l="1"]{background:#ffc30055}.heat i[data-l="2"]{background:#ffc30099}.heat i[data-l="3"]{background:#ffc300}.heat i[data-l="4"]{background:#ff5733}
.bars{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;align-items:end;height:130px;border-bottom:1px solid var(--strong)}
.bars div{display:grid;align-items:end;height:100%;position:relative}
.bars i{display:block;background:var(--ink);min-height:1px}
.bars b{position:absolute;left:0;right:0;text-align:center;font:500 .65rem var(--mono)}
.axis{display:flex;justify-content:space-between;font:400 .7rem var(--mono);color:var(--dim);margin-top:4px}

dialog{border:1px solid var(--strong);background:var(--paper);color:var(--ink);padding:20px;max-width:min(520px,calc(100vw - 24px));width:100%}
dialog::backdrop{background:rgba(0,0,0,.72)}
dialog h2{margin-bottom:10px}
.dlg-actions{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end;margin-top:16px}
.draw{max-width:min(980px,calc(100vw - 16px));padding:12px}
.draw-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.draw-head h2{margin:0}
#canvas{display:block;width:100%;height:auto;background:#fff;touch-action:none;cursor:crosshair;border:1px solid var(--strong)}
.draw-tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;align-items:center}
.toast{position:fixed;left:50%;bottom:calc(76px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:40;max-width:calc(100vw - 24px);width:max-content}
.toast>div{background:var(--ink);color:var(--paper);padding:10px 14px;display:flex;gap:12px;align-items:center;font-size:.95rem}
.toast button{border-color:var(--paper);color:var(--paper);min-height:40px}
.toast button:hover{background:var(--paper);color:var(--ink)}
kbd{font:600 .78rem var(--mono);border:1px solid var(--line);padding:1px 6px}
.shortcuts{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0}
.shortcuts dd{margin:0}

@media (min-width:860px){
  .shell{padding-bottom:24px}
  .tabs{position:static;display:flex;gap:4px;border:0;background:none;padding:0}
  .tabs a{display:flex;align-items:center;gap:8px;min-height:44px;padding:0 12px;font-size:.78rem}
  .tabs svg{width:18px;height:18px}
  .tabs a[aria-current=page]{box-shadow:inset 0 -3px 0 var(--ink)}
  .toast{bottom:24px}.bulk{bottom:12px}
  .big{width:auto;min-width:280px}
}
@media (max-width:380px){.rate{grid-template-columns:1fr 1fr}.today span{font-size:.72rem}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
:root[data-motion=off] *{transition:none!important;animation:none!important}
@media (forced-colors:active){.word,.grad{background:none;color:CanvasText}.face{border:2px solid CanvasText}}
@media print{.top,.tabs,.toast{display:none}}