:root{
  --ground:#EEF3F8; --panel:#FFFFFF; --ink:#1E2842; --muted:#56627F; --line:#CFD8E6;
  --brass:#A96C12; --brass-soft:#F7E9CC; --brick:#F3DDB0; --brick-edge:#C99A52; --brick-ink:#4A3413;
  --ok:#1F7A52; --ok-soft:#DCF1E6; --bad:#BE3B25; --bad-soft:#FBE2DC;
  --field:#FFFFFF; --accent:#2856AE; --accent-ink:#FFFFFF; --accent-soft:#E2EAF9;
  --safe:#26304C; --safe-2:#343F60; --gold:#E3A93C; --safe-ink:#F3DFB4;
  --display:"Baloo 2", "Avenir Next Rounded", "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  --body:"Nunito Sans", "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --ground:#111726; --panel:#1A2235; --ink:#E9EDF7; --muted:#A1ACC8; --line:#35415E;
    --brass:#E7AE4A; --brass-soft:#3A2F19; --brick:#5B4626; --brick-edge:#A27A3A; --brick-ink:#FBEBCB;
    --ok:#52C88F; --ok-soft:#163829; --bad:#F2806A; --bad-soft:#43221C;
    --field:#101727; --accent:#7EA5F2; --accent-ink:#0E1628; --accent-soft:#1F2C4B;
    --safe:#0C1120; --safe-2:#1B2338; --gold:#E7AE4A;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --ground:#111726; --panel:#1A2235; --ink:#E9EDF7; --muted:#A1ACC8; --line:#35415E;
  --brass:#E7AE4A; --brass-soft:#3A2F19; --brick:#5B4626; --brick-edge:#A27A3A; --brick-ink:#FBEBCB;
  --ok:#52C88F; --ok-soft:#163829; --bad:#F2806A; --bad-soft:#43221C;
  --field:#101727; --accent:#7EA5F2; --accent-ink:#0E1628; --accent-soft:#1F2C4B;
  --safe:#0C1120; --safe-2:#1B2338; --gold:#E7AE4A;
}
/* Bewusst ohne flex-gap, clamp(), padding-inline usw.: läuft so auch auf älteren iPads */
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.5;padding-left:16px;padding-right:16px}
h1,h2{font-family:var(--display);margin:0;line-height:1.15}
p{margin:0}
button{font:inherit;color:inherit;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;margin:0;padding:0;border:0;background:transparent;border-radius:0;line-height:1.1;touch-action:manipulation;-webkit-tap-highlight-color:rgba(0,0,0,0);-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* Mini-Header (Spiele nutzen nie den geteilten site-header) */
.game-header{display:flex;align-items:center;justify-content:space-between;padding:12px 0 0;margin:0 auto;max-width:780px}
.game-header a{color:var(--muted);text-decoration:none;font-weight:700;font-size:15px;padding:8px 0}
.game-header a:hover{color:var(--accent)}
.game-header .brand{font-weight:800;color:var(--ink)}

.wrap{max-width:780px;margin:0 auto;padding:20px 0 48px}
.wrap > * + *{margin-top:18px}

/* Kopf */
.top{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between}
.top h1{font-size:34px;font-weight:800;margin-right:16px}
.top h1 span{color:var(--brass)}
.chips{display:flex;flex-wrap:wrap;margin-left:-6px}
.chip{display:inline-block;margin:4px 0 0 6px;font-size:14px;font-weight:700;padding:2px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}

/* Tresor */
.safe{display:flex;flex-wrap:wrap;align-items:center;background-color:var(--safe);background-image:linear-gradient(180deg,var(--safe-2),var(--safe));border-radius:18px;padding:14px 16px;color:var(--safe-ink)}
.safe-lock{width:40px;height:40px;flex:none;margin-right:14px}
.dials{display:flex}
.dial{width:44px;height:56px;border-radius:10px;background:#0A0E1A;border:3px solid var(--gold);display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:800;font-size:28px;line-height:1;color:#4B5575}
.dial + .dial{margin-left:7px}
.dial.open{color:var(--gold);-webkit-animation:flip .5s ease-out;animation:flip .5s ease-out}
.dial.now{box-shadow:0 0 0 3px rgba(227,169,60,.4)}
@-webkit-keyframes flip{0%{-webkit-transform:scaleY(0)}100%{-webkit-transform:scaleY(1)}}
@keyframes flip{0%{transform:scaleY(0)}100%{transform:scaleY(1)}}
.safe-info{margin-left:auto;padding-left:12px;text-align:right}
.safe-info .lbl{display:block;font-size:13px;letter-spacing:.08em;text-transform:uppercase;opacity:.8}
.safe-info .val{display:block;font-family:var(--display);font-size:22px;font-weight:700;color:var(--gold)}

/* Karte */
.card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px 16px}
.card > * + *{margin-top:16px}
.eyebrow{font-size:14px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--brass)}
.card h2{font-size:24px;font-weight:700;margin-top:2px}
.body{display:flex;flex-direction:column;align-items:center;padding:6px 0}
.body > * + *{margin-top:14px}

/* Antwortfelder (Kn\F6 pfe) */
.num{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;min-width:84px;height:54px;padding:0 8px;border:2px solid var(--line);border-radius:10px;background:var(--field);color:var(--ink);font-family:var(--display);font-weight:700;font-size:26px;line-height:1}
.num.dig{min-width:0;width:100%;height:100%;padding:0}
.num.sel{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.num.ok,.opslot.ok{border-color:var(--ok);background:var(--ok-soft);color:var(--ink)}
.num.bad,.opslot.bad{border-color:var(--bad);background:var(--bad-soft);color:var(--ink)}
.num.revealed,.opslot.revealed{border-style:dashed}
.num.locked{cursor:default}

/* Zahlenmauer */
.wall{display:flex;flex-direction:column;align-items:center}
.wall .row{display:flex;justify-content:center}
.wall .row + .row{margin-top:6px}
.brick{width:70px;height:54px;background:var(--brick);border:2px solid var(--brick-edge);border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;font-size:24px;line-height:1;color:var(--brick-ink)}
.brick + .brick{margin-left:6px}
.brick .num{min-width:0;width:100%;height:100%;padding:0;border-radius:4px}

/* Gleichungen */
.eqs{display:block}
.eq{display:block;text-align:center;font-family:var(--display);font-weight:700;font-size:28px;line-height:1.3;white-space:normal}
.eqs .eq{text-align:left}
.eqs .eq + .eq{margin-top:10px}
.sym{display:inline-block;vertical-align:middle;font-size:34px;line-height:1;font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif}
.answers{display:flex;flex-wrap:wrap;justify-content:center;border-top:2px dashed var(--line);padding-top:10px;width:100%}
.ans-row{display:flex;align-items:center;margin:6px 12px;font-family:var(--display);font-size:26px;font-weight:700}
.ans-row > span{margin:0 8px}

/* Rechenzeichen */
.opslot{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;width:58px;height:58px;margin:0 4px;border-radius:12px;border:3px dashed var(--accent);background:var(--accent-soft);font-family:var(--display);font-size:30px;font-weight:800;line-height:1;color:var(--accent)}
.opslot.active{border-style:solid}
.opslot.filled{color:var(--ink)}
.palette{display:flex;justify-content:center}
.palette button{width:62px;height:62px;border-radius:14px;border:2px solid var(--line);background:var(--field);font-family:var(--display);font-size:32px;font-weight:800;color:var(--ink)}
.palette button + button{margin-left:10px}
.palette button:active{background:var(--accent-soft);border-color:var(--accent)}
.palette button:disabled{opacity:.4}

/* Kette */
.chain{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;margin:-4px}
.chain > *{margin:4px}
.cbox{display:flex;align-items:center;justify-content:center;min-width:84px;height:54px;padding:0 12px;border-radius:27px;background:var(--brass-soft);border:2px solid var(--brass);font-family:var(--display);font-weight:800;font-size:26px;line-height:1}
.chain .num{border-radius:27px}
.arrow{display:flex;flex-direction:column;align-items:center;font-family:var(--display);font-weight:700;color:var(--accent);line-height:1.1}
.arrow b{font-size:20px}
.arrow i{font-style:normal;font-size:22px}

/* Denken */
.story{width:100%;max-width:30em;font-size:21px;background:var(--brass-soft);border-radius:14px;padding:14px 18px}
.story span{display:block}
.story b{font-family:var(--display);font-size:24px}
.inline-ans{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;font-size:20px}
.inline-ans .num{margin-left:10px}

/* Ziffern */
.digits{display:grid;grid-gap:4px;font-family:var(--display);font-weight:700;font-size:28px;line-height:1}
.digits > div{width:46px;height:56px;display:flex;align-items:center;justify-content:center}
.digits .rule{border-top:3px solid var(--ink);padding-top:3px}

/* Ziffernblock */
.numpad{display:grid;grid-template-columns:1fr 1fr 1fr;grid-gap:8px;width:100%;max-width:330px;margin-left:auto;margin-right:auto}
.numpad button{height:60px;border-radius:14px;border:2px solid var(--line);background:var(--field);font-family:var(--display);font-size:28px;font-weight:700;color:var(--ink);text-align:center}
.numpad button:active{background:var(--accent-soft);border-color:var(--accent)}
.numpad button[data-k="\232B "],.numpad button[data-k="\2192 "]{color:var(--accent)}
.numpad button:disabled{opacity:.4}

/* Tipps + Aktionen */
.hints > * + *{margin-top:8px}
.hint{background:var(--accent-soft);border-radius:12px;padding:10px 14px;font-size:17px}
.hint strong{color:var(--accent)}
.actions{display:flex;flex-wrap:wrap;margin:-5px}
.actions > *{margin:5px}
.btn{display:inline-block;border-radius:12px;border:2px solid var(--line);background:var(--field);color:var(--ink);padding:12px 20px;font-family:var(--display);font-weight:700;font-size:19px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#23180A}
.btn:disabled{opacity:.45;cursor:default}
.feedback{min-height:1.5em;font-weight:700;font-size:18px}
.feedback.ok{color:var(--ok)}
.feedback.bad{color:var(--bad)}

/* Finale */
.finale{text-align:center}
.finale > * + *{margin-top:12px}
.finale svg{display:block;width:220px;max-width:60%;height:auto;margin:0 auto}
.finale .code{font-family:var(--display);font-size:38px;font-weight:800;letter-spacing:.15em;color:var(--brass)}
.finale .actions{justify-content:center}

/* Einstellungen */
details.settings{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:4px 18px}
details.settings summary{font-family:var(--display);font-weight:700;font-size:18px;padding:10px 0;cursor:pointer}
.set-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:16px;padding:6px 0 16px}
fieldset{border:0;margin:0;padding:0;min-width:0}
legend{padding:0;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
fieldset label{display:flex;align-items:center;margin-top:6px;font-size:17px}
fieldset input{margin:0 8px 0 0;width:20px;height:20px;flex:none}
.linkcode{display:flex;flex-wrap:wrap;align-items:center;padding-bottom:10px;font-size:16px;color:var(--muted)}
.linkcode > *{margin:4px 8px 4px 0}
.linkcode code{background:var(--accent-soft);color:var(--accent);padding:3px 8px;border-radius:6px;font-size:16px}
.small{font-size:15px;color:var(--muted)}
.loading{color:var(--muted)}

/* Tablet und größer */
@media (min-width:600px){
  .top h1{font-size:42px}
  .card{padding:26px 28px}
  .card h2{font-size:28px}
  .dial{width:52px;height:64px;font-size:34px}
  .safe-lock{width:44px;height:44px}
  .brick{width:86px;height:62px;font-size:27px}
  .num{height:62px;min-width:96px;font-size:30px}
  .digits > div{width:54px;height:64px}
  .digits{font-size:32px}
  .opslot{width:66px;height:66px}
  .palette button{width:70px;height:70px}
  .numpad{max-width:360px}
  .numpad button{height:66px;font-size:30px}
  .eq{font-size:32px}
  .sym{font-size:40px}
}
@media (max-width:380px){
  .brick{width:62px}
  .dial{width:40px}
  .dial + .dial{margin-left:5px}
}
@media (prefers-reduced-motion: reduce){.dial.open{-webkit-animation:none;animation:none}}

/* Schüler-Modus (Einstellungen per URL-Kürzel): kein Header, keine Einstellungen */
html.is-pupil-mode .game-header,
html.is-pupil-mode #settings{display:none!important}
html.is-pupil-mode .wrap{padding-top:12px}