@import url("https://fonts.googleapis.com/css2?family=Unbounded:wght@500;700;800;900&family=Chakra+Petch:ital,wght@0,500;0,600;0,700;1,600;1,700&family=Instrument+Sans:wght@400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Dela+Gothic+One&display=swap&text=%E3%81%B8%E3%82%8B%E3%82%A4%E3%82%A8%E3%82%AF%E3%82%B7%E3%82%B8%E3%82%B9%E3%82%BA%E3%83%86%E3%83%A7%E3%83%B3%E3%83%BC%E5%A4%A7%E5%BA%A7%E6%88%BB%E6%AC%A1%E8%AC%9B%E9%98%AA%E9%A7%86%E5%8B%95%E7%B3%BB%E8%B6%B3%E5%9B%9E%E3%82%8A");

/* ==========================================================================
   OSAKA NIGHT RUN · OCG Motorenkunde Theme
   Layout-Idee: Osaka bei Nacht, Werkstatt-Tor offen. Nachtschwarz + Karbon,
   Kupfer (Shisa-Logo) für Chrom und Beschriftung, Flamme für alles, was man
   drücken kann. Rennmenü-Buttons im Parallelogramm, HUD-Ecken statt runder
   Karten, Stempel 大阪 als Marke. Der Farben-Code der Simulationen bleibt.
   ========================================================================== */
:root{
  --bg:#07080C; --surface:#0F1117; --surface2:#161920; --cav:#0A0B10; --line:#252934; --line-hi:#353B49;
  --ink:#F2EDE6; --muted:#9D968C;
  --accent:#FF6B1C; --accent-hi:#FF8A45; --accent-soft:#2A1509;
  --copper:#D98E6A; --copper-hi:#F0B48C; --copper-lo:#7A4A34;
  --redline:#FF2D3D; --night-blue:#16283F;
  --brand:"Unbounded","Arial Black",Arial,sans-serif;
  --display:"Chakra Petch","Arial Narrow",Arial,sans-serif;
  --body:"Instrument Sans","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --jp:"Dela Gothic One","Hiragino Sans","Yu Gothic","Noto Sans JP",sans-serif;
  --skew:-14deg;
  --ease-snap:cubic-bezier(.2,.9,.25,1.15);
  --ease-out:cubic-bezier(.16,1,.3,1);
  color-scheme:dark;
}
html{scroll-behavior:smooth;background:var(--bg)}
body{background:var(--bg);position:relative;isolation:isolate}
::selection{background:var(--accent);color:#140801}

/* ---------- Atmosphäre: Stadtlicht, Raster, Kanji-Wasserzeichen ---------- */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(60vw 40vh at 88% -6%, rgba(255,107,28,.13), transparent 70%),
    radial-gradient(50vw 45vh at -8% 38%, rgba(40,90,150,.13), transparent 70%),
    radial-gradient(40vw 30vh at 70% 105%, rgba(217,142,106,.08), transparent 70%),
    linear-gradient(var(--bg),var(--bg));
}
body::after{
  content:"大阪";position:fixed;right:-2vw;bottom:-6vh;z-index:-1;pointer-events:none;
  font:400 min(38vw,420px)/1 var(--jp);writing-mode:vertical-rl;
  color:transparent;-webkit-text-stroke:1px rgba(217,142,106,.05);
}
.wrap{position:relative;grid-template-columns:minmax(0,1fr)}
.wrap::before{
  content:"";position:absolute;inset:-40px -16px 0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(#000 0,transparent 900px);mask-image:linear-gradient(#000 0,transparent 900px);
}

/* ---------- Kopfleiste: Glas, Stempel, Drehzahl-Fortschritt ---------- */
.top{
  background:rgba(7,8,12,.82);-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);animation:osk-drop .6s var(--ease-out) both;
}
.top::after{
  content:"";position:absolute;left:0;bottom:-1px;height:2px;width:calc(var(--osk-prog,0) * 100%);
  background:linear-gradient(90deg,var(--copper) 0,var(--accent) 70%,var(--redline) 100%);
  box-shadow:0 0 12px rgba(255,107,28,.55);transition:width .12s linear;
}
.top .in>a:first-child{display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.top .in>a:first-child::before{
  content:"大阪";display:inline-grid;place-items:center;width:30px;height:30px;
  font:400 .78rem/1 var(--jp);color:#1A0802;background:var(--accent);
  border-radius:3px;transform:rotate(-6deg);box-shadow:0 0 0 2px rgba(255,107,28,.25),0 0 18px rgba(255,107,28,.35);
  letter-spacing:0;transition:transform .35s var(--ease-snap);
}
.top .in>a:first-child:hover::before{transform:rotate(0) scale(1.08)}
.top a{transition:color .2s}
.top a:hover{color:var(--copper-hi)}
.top .here{color:var(--copper-hi)!important;max-width:min(46ch,40vw);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.top .sep{color:var(--line-hi);transform:skewX(var(--skew));display:inline-block}
.top .cta{color:var(--accent)!important}

/* ---------- Überschriften ---------- */
h1,h2{font-family:var(--brand);letter-spacing:-.01em}
h3{font-family:var(--display);letter-spacing:.01em}
.hero{position:relative;padding-top:40px}
.hero>*{position:relative}
.hero>.lbl:first-child{display:flex;flex-wrap:wrap;align-items:center;gap:6px 12px;color:var(--copper)}
.hero>.lbl:first-child::before{
  content:var(--osk-hero-jp,"エンジン講座");font:400 .82rem/1 var(--jp);letter-spacing:.08em;color:var(--ink);
  padding:6px 12px 6px 10px;background:linear-gradient(90deg,var(--redline),var(--accent));
  clip-path:polygon(0 0,100% 0,calc(100% - 8px) 100%,0 100%);
}
.hero h1{
  font-family:var(--brand);font-weight:900;text-transform:uppercase;line-height:.98;
  font-size:clamp(1.9rem,5.6vw,4rem);letter-spacing:-.02em;hyphens:auto;overflow-wrap:break-word;
  animation:osk-in-left .8s var(--ease-out) .05s both;
}
.hero h1 span{
  color:var(--accent);
  background:linear-gradient(100deg,var(--accent) 0 38%,#FFD2B0 46%,var(--accent) 54% 100%);
  background-size:260% 100%;background-position:100% 0;
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  text-shadow:none;filter:drop-shadow(0 0 22px rgba(255,107,28,.35));
  animation:osk-shine 1.6s var(--ease-out) .55s both, osk-neon 1.2s steps(1) .25s both;
}
.hero .lead{color:#D9D3CA;animation:osk-fade-up .7s var(--ease-out) .25s both}
/* Rennstreifen unter dem Titelblock */
.hero::after{
  content:"";display:block;height:6px;width:min(360px,70%);margin-top:4px;
  background:linear-gradient(90deg,var(--redline) 0 30%,transparent 30% 34%,var(--accent) 34% 64%,transparent 64% 68%,var(--copper) 68% 100%);
  transform:skewX(var(--skew));transform-origin:left;animation:osk-stripe .9s var(--ease-out) .4s both;
}
/* Leuchtspuren auf der Wangan: nur im Hero */
.hero::before{
  content:"";position:absolute;inset:0 -16px auto;height:100%;pointer-events:none;z-index:0;
  background:
    linear-gradient(90deg,transparent,rgba(255,107,28,.55),transparent) 0 22%/180px 1px no-repeat,
    linear-gradient(90deg,transparent,rgba(240,180,140,.45),transparent) 0 58%/260px 1px no-repeat,
    linear-gradient(90deg,transparent,rgba(74,157,255,.35),transparent) 0 81%/140px 1px no-repeat;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 20%,#000 80%,transparent);mask-image:linear-gradient(90deg,transparent,#000 20%,#000 80%,transparent);
  animation:osk-streaks 7s linear infinite;opacity:.5;
}

/* Inhaltsverzeichnis: Rennmenü-Chips */
.toc{gap:8px 6px;animation:osk-fade-up .7s var(--ease-out) .4s both}
.toc a{
  position:relative;isolation:isolate;border:0!important;background:none!important;border-radius:0;
  padding:8px 18px;font:600 .9rem var(--display);letter-spacing:.05em;text-transform:uppercase;color:var(--ink);
  transition:color .2s,transform .25s var(--ease-snap);
}
.toc a::before{content:"";position:absolute;inset:0;z-index:-1;transform:skewX(var(--skew));background:var(--surface2);border:1px solid var(--line-hi);border-radius:2px;transition:background .25s,border-color .25s,box-shadow .25s}
.toc a b{font-family:var(--brand);font-weight:800;color:var(--accent)}
.toc a:hover{color:#170A02;transform:translateY(-2px)}
.toc a:hover b{color:#170A02}
.toc a:hover::before{background:var(--accent);border-color:var(--accent);box-shadow:0 6px 24px rgba(255,107,28,.35)}

/* ---------- Stationen ---------- */
.sec{position:relative;grid-template-columns:minmax(0,1fr)}
.sec>header{position:relative;padding-top:6px}
.sec>header[data-osk-n]::before{
  content:attr(data-osk-n);position:absolute;right:0;top:-22px;z-index:-1;pointer-events:none;
  font:900 clamp(4.5rem,11vw,8.5rem)/1 var(--brand);letter-spacing:-.04em;
  color:transparent;-webkit-text-stroke:1.5px rgba(217,142,106,.16);
}
.sec h2{font-weight:800;text-transform:none;line-height:1.08;font-size:clamp(1.3rem,4.6vw,2.2rem);hyphens:auto;overflow-wrap:anywhere}
h3{hyphens:auto;overflow-wrap:break-word}
.sec h2 small{
  display:flex;align-items:center;gap:10px;font:700 .72rem var(--display);letter-spacing:.16em;color:var(--copper-hi);margin-bottom:10px;
}
.sec h2 small::before{
  content:attr(data-osk-jp);font:400 .72rem/1 var(--jp);letter-spacing:.06em;color:#1A0802;background:var(--copper);
  padding:5px 9px 5px 8px;clip-path:polygon(0 0,100% 0,calc(100% - 6px) 100%,0 100%);
}
.sec h2 small::after{content:"";flex:1;max-width:120px;height:1px;background:linear-gradient(90deg,var(--copper-lo),transparent)}
.sec>.lbl{color:var(--copper)}
h3.sub{font-family:var(--brand);font-weight:700;font-size:1.15rem}

/* ---------- Flächen: HUD-Ecken, Karbon, scharfe Kanten ---------- */
.panel,.card,.explain,.q,.type,.note,.how>div,.depth,.prog,.phase .lessons>.les,.ecol{border-radius:4px}
.panel,.card,.explain,.q,.type,.note,.how>div,.depth{position:relative;border-color:var(--line)}
.panel{
  background:
    linear-gradient(180deg,rgba(255,255,255,.025),transparent 120px),
    repeating-linear-gradient(45deg,rgba(255,255,255,.012) 0 2px,transparent 2px 5px),
    var(--surface);
  box-shadow:0 1px 0 rgba(255,255,255,.03) inset,0 24px 60px -30px rgba(0,0,0,.8);
}
.panel::before,.card::before,.explain::before,.note::before,.type::before,.how>div::before,.depth::before,.q::before{
  content:"";position:absolute;inset:-1px;pointer-events:none;border-radius:4px;
  background:
    linear-gradient(var(--copper),var(--copper)) 0 0/14px 2px no-repeat,
    linear-gradient(var(--copper),var(--copper)) 0 0/2px 14px no-repeat,
    linear-gradient(var(--copper),var(--copper)) 100% 100%/14px 2px no-repeat,
    linear-gradient(var(--copper),var(--copper)) 100% 100%/2px 14px no-repeat;
  opacity:.55;transition:opacity .3s,filter .3s;
}
.panel:hover::before,.card:hover::before,.explain:hover::before,.type:hover::before{opacity:1;filter:drop-shadow(0 0 6px rgba(217,142,106,.6))}
.card{background:linear-gradient(180deg,#12141B,var(--surface));transition:transform .35s var(--ease-out),border-color .3s,box-shadow .35s}
.card:hover{transform:translateY(-3px);border-color:var(--line-hi);box-shadow:0 18px 40px -22px rgba(255,107,28,.35)}
.card h3{font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.03em;font-size:1.08rem}
.fig{border-radius:3px;background:radial-gradient(120% 90% at 50% 0,#1E222B,var(--surface2));border:1px solid rgba(255,255,255,.04)}
.fig span b{font-family:var(--display);text-transform:uppercase;letter-spacing:.08em;font-size:.72rem;color:var(--copper-hi)}
.eq{font-family:var(--brand);color:var(--accent);text-shadow:0 0 14px rgba(255,107,28,.5)}
.explain{background:linear-gradient(90deg,rgba(217,142,106,.06),transparent 40%),var(--surface)}
.explain svg{filter:drop-shadow(0 4px 10px rgba(0,0,0,.4))}
.explain .al{color:var(--copper-hi)}
.lbl{letter-spacing:.14em}

/* Messwerte wie ein Kombiinstrument */
.rd .v,.sl output,.big,.score,.prog b{font-family:var(--display);font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.rd .v,.sl output{text-shadow:0 0 12px rgba(255,138,69,.18)}
.rd>div{border-left:1px solid var(--line);padding-left:10px}
.rd .lbl{font-size:.66rem;color:var(--muted)}

/* Urteil: LED + Blitz bei Änderung */
.verdict{border-radius:3px;border-left-width:3px;background:linear-gradient(90deg,rgba(91,227,138,.07),transparent 60%),var(--surface2);position:relative}
.verdict.warn{background:linear-gradient(90deg,rgba(242,182,74,.08),transparent 60%),var(--surface2)}
.verdict.bad{background:linear-gradient(90deg,rgba(255,110,94,.1),transparent 60%),var(--surface2)}
.verdict b{font-family:var(--display);font-weight:700;letter-spacing:.02em;display:flex;align-items:center;gap:10px}
.verdict b::before{content:"";flex:0 0 9px;height:9px;border-radius:50%;background:var(--good);box-shadow:0 0 10px var(--good)}
.verdict.warn b::before{background:var(--warn);box-shadow:0 0 10px var(--warn)}
.verdict.bad b::before{background:var(--bad);box-shadow:0 0 12px var(--bad);animation:osk-blink 1s steps(2) infinite}
.verdict.osk-flash{animation:osk-flash .55s var(--ease-out)}

/* ---------- Buttons: Rennspiel-Menü ---------- */
.btn,.seg button,.opts button,.zv-open,.zv-close,.lnav a,.lnav>span,.tline button,.stg button,.kpre button,.les .done{
  -webkit-tap-highlight-color:transparent;
}
.btn,.opts button,.zv-open,.zv-close,.lnav a,.lnav>span,.tline button,.stg button,.kpre button{
  position:relative;isolation:isolate;overflow:visible;border:0!important;background:none!important;border-radius:0!important;
  font-family:var(--display);font-weight:700;letter-spacing:.04em;color:var(--ink);cursor:pointer;
  transition:color .2s,transform .18s var(--ease-snap);
}
.btn::before,.opts button::before,.zv-open::before,.zv-close::before,.lnav a::before,.lnav>span::before,.tline button::before,.stg button::before,.kpre button::before{
  content:"";position:absolute;inset:0;z-index:-1;transform:skewX(var(--skew));border-radius:2px;
  background:linear-gradient(180deg,#1E222B,var(--surface2));border:1px solid var(--line-hi);
  transition:background .25s,border-color .25s,box-shadow .3s;
}
.btn::after,.lnav a::after{
  content:"";position:absolute;inset:0;z-index:-1;transform:skewX(var(--skew));pointer-events:none;
  background:linear-gradient(105deg,transparent 30%,rgba(255,255,255,.35) 48%,transparent 62%) -140% 0/60% 100% no-repeat;
  transition:background-position .6s var(--ease-out);
}
.btn:hover::after,.lnav a:hover::after{background-position:240% 0}
.btn:hover::before,.opts button:hover::before,.zv-open:hover::before,.zv-close:hover::before,.lnav a:hover::before,.tline button:hover::before,.stg button:hover::before,.kpre button:hover::before{border-color:var(--accent);box-shadow:0 0 0 1px rgba(255,107,28,.25),0 8px 22px -10px rgba(255,107,28,.6)}
.btn:hover,.zv-open:hover,.lnav a:hover{transform:translateY(-1px)}
.btn:active,.opts button:active,.zv-open:active,.lnav a:active,.seg button:active,.toc a:active{transform:translateY(1px) scale(.97);transition-duration:.05s}
.btn.pri,.lnav .nx{color:#170A02!important}
.btn.pri::before,.lnav .nx::before{background:linear-gradient(180deg,var(--accent-hi),var(--accent));border-color:var(--accent);box-shadow:0 0 0 1px rgba(255,107,28,.3),0 10px 30px -12px rgba(255,107,28,.8)}
.btn.pri:hover::before{background:linear-gradient(180deg,#FFA066,var(--accent-hi))}
.btn{padding:9px 20px}
.zv-open{padding:6px 16px;font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--copper-hi)}
.zv-open:hover{color:var(--ink)}
:is(.btn,.opts button,.zv-open,.lnav a,.seg button,.toc a):focus-visible{outline:none}
:is(.btn,.opts button,.zv-open,.lnav a,.toc a):focus-visible::before{border-color:var(--accent-hi);box-shadow:0 0 0 2px var(--accent-hi)}
.seg button:focus-visible{box-shadow:inset 0 0 0 2px var(--accent-hi)}

/* Segment-Schalter: Ganghebel mit gleitendem Schlitten */
.seg{position:relative;isolation:isolate;border-radius:3px;background:#0C0E13;border:1px solid var(--line);padding:3px;gap:2px}
.seg button{position:relative;z-index:1;border-radius:2px;font-family:var(--display);font-weight:700;letter-spacing:.03em;transition:color .25s,background .25s}
.seg button[aria-pressed="true"]{background:linear-gradient(180deg,var(--accent-hi),var(--accent));color:#170A02;box-shadow:0 0 18px -4px rgba(255,107,28,.7)}
.seg.osk-slide button[aria-pressed="true"]{background:transparent;box-shadow:none}
.osk-ind{
  position:absolute;z-index:0;left:0;top:0;width:0;height:0;border-radius:2px;pointer-events:none;
  background:linear-gradient(180deg,var(--accent-hi),var(--accent));box-shadow:0 0 22px -4px rgba(255,107,28,.8);
  transition:transform .45s var(--ease-snap),width .45s var(--ease-snap),height .45s var(--ease-snap),opacity .2s;
}
.osk-ind::after{content:"";position:absolute;left:50%;bottom:-3px;width:16px;height:2px;margin-left:-8px;background:#FFE1CC;border-radius:1px;box-shadow:0 0 8px #FFB080}
.seg:not(.osk-slide)>.osk-ind{opacity:0}
.top .mode .seg{background:rgba(12,14,19,.8)}

/* Quiz */
.q{background:linear-gradient(180deg,#12141B,var(--surface))}
.q b{font-family:var(--display);font-weight:700}
.opts{gap:10px}
.opts button{max-width:calc(100% - 10px);white-space:normal;padding:9px 18px;font-weight:600;letter-spacing:.01em;text-align:left}
.opts button.ok{color:var(--good)}
.opts button.ok::before{border-color:var(--good);background:linear-gradient(180deg,rgba(91,227,138,.18),rgba(91,227,138,.06));box-shadow:0 0 22px -6px var(--good)}
.opts button.ok{animation:osk-pop .5s var(--ease-snap)}
.opts button.no{color:var(--bad)}
.opts button.no::before{border-color:var(--bad);background:rgba(255,110,94,.1)}
.opts button.no{animation:osk-shake .45s}
.score{font-family:var(--brand);font-weight:800;font-size:1.3rem;color:var(--accent)}

/* Schieberegler: Drehzahlband mit Leuchtpunkt */
input[type=range]{
  -webkit-appearance:none;appearance:none;background:transparent;height:26px;cursor:pointer;accent-color:var(--accent);
  --p:50%;
}
input[type=range]::-webkit-slider-runnable-track{
  height:6px;border-radius:1px;
  background:
    repeating-linear-gradient(90deg,transparent 0 9px,rgba(7,8,12,.9) 9px 11px),
    linear-gradient(90deg,var(--copper) 0,var(--accent) var(--p),#232733 var(--p));
  box-shadow:0 0 0 1px #2C313D inset;
}
input[type=range]::-moz-range-track{height:6px;border-radius:1px;background:repeating-linear-gradient(90deg,transparent 0 9px,rgba(7,8,12,.9) 9px 11px),#232733}
input[type=range]::-moz-range-progress{height:6px;background:linear-gradient(90deg,var(--copper),var(--accent))}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;width:22px;height:22px;margin-top:-8px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,#FFE6D6 0 3px,var(--accent) 4px 6px,#15171E 7px);
  border:2px solid var(--accent);box-shadow:0 0 0 4px rgba(255,107,28,.12),0 0 16px rgba(255,107,28,.6);
  transition:transform .2s var(--ease-snap),box-shadow .2s;
}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#15171E;border:3px solid var(--accent);box-shadow:0 0 16px rgba(255,107,28,.6)}
input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.12)}
input[type=range]:active::-webkit-slider-thumb{transform:scale(1.22);box-shadow:0 0 0 7px rgba(255,107,28,.18),0 0 26px rgba(255,107,28,.9)}
input[type=range]:focus-visible{outline:none}
input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 3px var(--accent-hi),0 0 18px rgba(255,107,28,.8)}

/* Lektionen-Navigation: 戻る / 次へ */
.lnav{gap:14px}
.lnav a,.lnav>span{padding:14px 22px;font-size:.95rem}
.lnav>span{color:var(--muted);cursor:default}
.lnav>span::before{border-style:dashed}
.lnav>a:first-child::after,.lnav>a:last-child:not(:first-child)::after{display:none}
.lnav>a:first-child{padding-left:22px}
.osk-k{font-style:normal;display:inline;border:0;background:none;padding:0;font:400 .7rem/1 var(--jp);color:var(--copper);margin-right:10px;letter-spacing:.06em}
.lnav>a:last-child:not(:first-child){color:#170A02}
.lnav>a:last-child:not(:first-child)::before{background:linear-gradient(180deg,var(--accent-hi),var(--accent));border-color:var(--accent);box-shadow:0 10px 30px -12px rgba(255,107,28,.8)}
.lnav>a:last-child:not(:first-child) .osk-k{color:#3A1300}

/* Fußzeile mit Stempel und Slogan */
footer{border-top:1px solid var(--line);position:relative;padding-top:26px}
footer::before{content:"";position:absolute;left:0;top:-1px;width:120px;height:2px;background:linear-gradient(90deg,var(--accent),transparent)}
footer::after{
  content:"大阪  ·  WE HUNT. YOU WIN.";margin-top:10px;font:700 .72rem var(--display);letter-spacing:.22em;color:var(--copper);
}

/* ---------- Großansicht ---------- */
.zv{background:radial-gradient(80vw 60vh at 80% 0,rgba(255,107,28,.08),transparent 70%),var(--bg)}
.zv-bar{background:rgba(15,17,23,.92);border-bottom:1px solid var(--line)}
.zv-bar b{font-family:var(--brand);font-weight:800;letter-spacing:0;text-transform:none}
.zv-close{padding:8px 18px}
.zv-tools button{border-radius:3px;background:var(--surface2);border-color:var(--line-hi);transition:border-color .2s,transform .15s}
.zv-tools button:hover{border-color:var(--accent)}
.zv-tools button:active{transform:scale(.94)}
.zv-canvas>svg{background:
  linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px) 0 0/40px 40px,
  linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px) 0 0/40px 40px,var(--surface)}
.zv-grip{background:var(--accent);box-shadow:0 0 10px var(--accent)}
.zv:not([hidden]){animation:osk-zoom-in .35s var(--ease-out)}

/* ---------- Startseite (Lernpfad) ---------- */
.btns{gap:14px}
.depth b{font-family:var(--brand);font-weight:800;color:var(--accent)}
.how h3{font-family:var(--brand);font-weight:700;font-size:1rem}
.prog{border-radius:4px;background:var(--surface)}
.prog .bar{height:12px;border-radius:1px;background:#1A1D25;position:relative}
.prog .bar i{border-radius:1px;background:linear-gradient(90deg,var(--copper),var(--accent) 80%,var(--redline));box-shadow:0 0 14px rgba(255,107,28,.6)}
.prog .bar::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 14px,var(--surface) 14px 16px)}
.phase{border-top-color:var(--line)}
.phase header h3{font-family:var(--brand);font-weight:800;font-size:1.2rem}
.phase header .era{color:var(--copper-hi)}
.les{border-radius:3px!important;background:linear-gradient(90deg,#12141B,var(--surface));transition:transform .3s var(--ease-out),border-color .25s,box-shadow .3s}
.les::before{content:"";position:absolute;left:-1px;top:-1px;bottom:-1px;width:3px;background:transparent;transition:background .25s,box-shadow .25s}
.les.live::before{background:var(--copper)}
.les.live:hover{transform:translateX(6px);border-color:var(--accent);box-shadow:0 12px 30px -18px rgba(255,107,28,.7)}
.les.live:hover::before{background:var(--accent);box-shadow:0 0 12px var(--accent)}
.les .n{border-radius:2px;font-family:var(--brand);font-weight:800;font-size:.95rem;transform:skewX(-8deg)}
.les.live .n{background:linear-gradient(180deg,var(--accent-hi),var(--accent));color:#170A02;box-shadow:0 0 16px -4px rgba(255,107,28,.8)}
.les.is-done .n{background:linear-gradient(180deg,#7CF0A3,var(--good))}
.les .t b{font-family:var(--display);font-weight:700;letter-spacing:.01em}
.pill{border-radius:1px;transform:skewX(-10deg)}
.pill.live{background:rgba(91,227,138,.08)}
.note{background:linear-gradient(135deg,rgba(217,142,106,.08),transparent 50%),var(--surface)}
.note h3{font-family:var(--brand);font-weight:800}
.contact span{border-radius:2px}

/* ---------- Scroll-Einblendung (nur wo der Browser es kann, Ruhezustand sichtbar) ---------- */
@supports (animation-timeline:view()){
  .panel,.card,.q,.les,.explain,.type{animation:osk-rise linear both;animation-timeline:view();animation-range:entry 0% entry 35%}
}

/* ---------- Funken beim Klick ---------- */
.osk-spark{position:fixed;z-index:9999;width:2px;height:10px;margin:-5px 0 0 -1px;pointer-events:none;border-radius:1px;background:linear-gradient(var(--accent-hi),rgba(255,107,28,0));animation:osk-spark .5s var(--ease-out) forwards}


/* Eigene Kästen der Lektionen: gleiche scharfe Kante */
:is(.blk div,.calc,.case,.chk div,.chk fieldset,.cmp,.coinbox,.dl div,.fbox>div,.fdbox,.finish,.hist div,.law,.link-a1,.mt,.namebox,.partinfo,.pc>div,.stage,.statebox,.status,.stg,.sw,.takt,.takt-now,.tdet,.tipp,.tl div,.tunebox,.vs div,.why div){border-radius:4px}
:is(.hist div,.tl div,.why div,.vs div,.case,.tipp,.law){transition:border-color .25s,transform .3s var(--ease-out)}
:is(.hist div,.tl div,.case):hover{border-color:var(--copper-lo);transform:translateY(-2px)}

/* Handy: kompakte Kopfleiste (Stempel + Umschalter) */
@media (max-width:640px){
  .top{padding-block:8px}
  .top .in{flex-wrap:nowrap;gap:8px}
  .top .in>a:first-child{font-size:0;gap:0;flex:0 0 auto}
  .top .in>a:first-child::before{font-size:.78rem}
  .top .in>a:not(:first-child):not(.cta),.top .sep{display:none}
  .top .here{display:block;flex:1 1 auto;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:.66rem!important;letter-spacing:.08em!important}
  .top .mode{margin-left:auto;flex-wrap:nowrap;gap:4px}
  .top .mode .here{display:none}
  .top .seg{padding:2px}
  .top .seg button{padding:5px 7px;font-size:.72rem}
}
@media (max-width:420px){.top .here{display:none}}

/* ---------- Keyframes ---------- */
@keyframes osk-drop{from{transform:translateY(-100%);opacity:0}to{transform:none;opacity:1}}
@keyframes osk-in-left{from{transform:translateX(-40px) skewX(-8deg);opacity:0;filter:blur(6px)}to{transform:none;opacity:1;filter:none}}
@keyframes osk-fade-up{from{transform:translateY(14px);opacity:0}to{transform:none;opacity:1}}
@keyframes osk-shine{from{background-position:100% 0}to{background-position:0 0}}
@keyframes osk-neon{0%{opacity:.2}10%{opacity:1}14%{opacity:.35}22%{opacity:1}30%{opacity:.6}34%,100%{opacity:1}}
@keyframes osk-stripe{from{transform:skewX(var(--skew)) scaleX(0)}to{transform:skewX(var(--skew)) scaleX(1)}}
@keyframes osk-streaks{from{background-position:-20% 22%,-40% 58%,-10% 81%}to{background-position:140% 22%,160% 58%,130% 81%}}
@keyframes osk-rise{from{opacity:.35;transform:translateY(28px)}to{opacity:1;transform:none}}
@keyframes osk-flash{0%{box-shadow:0 0 0 1px rgba(255,255,255,.35),0 0 30px -6px rgba(255,138,69,.6)}100%{box-shadow:0 0 0 0 transparent}}
@keyframes osk-blink{50%{opacity:.25}}
@keyframes osk-pop{0%{transform:scale(1)}40%{transform:scale(1.07)}100%{transform:scale(1)}}
@keyframes osk-shake{0%,100%{transform:none}20%{transform:translateX(-6px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}
@keyframes osk-zoom-in{from{opacity:0;transform:scale(1.02)}to{opacity:1;transform:none}}
@keyframes osk-spark{from{opacity:1;transform:rotate(var(--a)) translateY(0) scaleY(1)}to{opacity:0;transform:rotate(var(--a)) translateY(calc(var(--d) * -1)) scaleY(.3)}}

@media (max-width:560px){
  body::after{font-size:62vw;right:-10vw}
  .sec>header[data-osk-n]::before{top:-10px}
  .lnav a,.lnav>span{padding:12px 18px}
  .hero::before{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .hero h1 span{background:none;-webkit-text-fill-color:var(--accent)}
}