:root{
  --tk-bg:#c3d7de;
  --tk-surface:#ffffff;
  --tk-surface-2:#f7fafc;
  --tk-panel:#d9e8ed;
  --tk-text:#17212b;
  --tk-muted:#667985;
  --tk-line:#c7d7df;
  --tk-line-strong:#9eb7c2;
  --tk-cyan:#18bfd2;
  --tk-cyan-dark:#067f92;
  --tk-mint:#5bcfae;
  --tk-violet:#7965df;
  --tk-danger:#c63b5e;
  --tk-shadow:0 18px 48px rgba(35,65,82,.12);
  --tk-header:60px;
  color-scheme:light;
}
html[data-theme="dark"]{
  --tk-bg:#111c24;
  --tk-surface:#1b2a35;
  --tk-surface-2:#243744;
  --tk-panel:#172731;
  --tk-text:#f5fafc;
  --tk-muted:#b2c4ce;
  --tk-line:#405966;
  --tk-line-strong:#6d8996;
  --tk-cyan:#62d8e5;
  --tk-cyan-dark:#8ae8f1;
  --tk-mint:#75dfc0;
  --tk-violet:#ad9cff;
  --tk-danger:#ff91aa;
  --tk-shadow:0 18px 48px rgba(0,0,0,.28);
  color-scheme:dark;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;min-height:100%;overflow-x:hidden}
html{background:var(--tk-bg);-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  min-height:100vh;min-height:100svh;
  color:var(--tk-text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 0 0,rgba(24,191,210,.18),transparent 29rem),
    radial-gradient(circle at 100% 6%,rgba(121,101,223,.14),transparent 28rem),
    linear-gradient(180deg,color-mix(in srgb,var(--tk-bg) 84%,#fff),var(--tk-bg));
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(50,87,107,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(50,87,107,.035) 1px,transparent 1px);
  background-size:30px 30px;
}
button{font:inherit;touch-action:manipulation}
button:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--tk-cyan) 48%,transparent);outline-offset:3px}
.app{
  width:min(100%,1120px);min-height:100vh;min-height:100svh;height:auto;margin:0 auto;
  padding:0 max(12px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));
  display:grid;grid-template-rows:auto 1fr auto;gap:0;
}
.topbar{
  position:sticky;top:0;z-index:30;
  min-height:var(--tk-header);margin:0 -12px;padding:9px max(14px,env(safe-area-inset-right));
  display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;
  color:var(--tk-text);background:color-mix(in srgb,var(--tk-surface) 88%,transparent);
  border:0;border-bottom:1px solid color-mix(in srgb,var(--tk-line) 75%,transparent);border-radius:0;
  box-shadow:none;backdrop-filter:blur(18px) saturate(1.15);
}
.brand{min-width:0}
.brand-title{color:var(--tk-text);font-size:clamp(21px,4.8vw,30px);line-height:1;font-weight:1000;letter-spacing:-.04em;text-shadow:none}
.brand-sub{margin-top:4px;color:var(--tk-muted);font-size:10px;line-height:1.15;font-weight:850;letter-spacing:.07em;text-transform:uppercase;white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:7px}
.icon-btn,.theme-toggle{
  height:42px;border:1px solid var(--tk-line);border-radius:13px;color:var(--tk-text);background:var(--tk-surface);box-shadow:0 4px 12px rgba(40,68,84,.06);cursor:pointer;
}
.icon-btn{width:42px;padding:0;display:grid;place-items:center}
.icon-btn.red{color:#fff;background:var(--tk-danger);border-color:var(--tk-danger)}
html[data-theme="dark"] .icon-btn.red{color:#481021}
.icon-btn svg{width:20px;height:20px}
.theme-toggle{position:relative;width:64px;padding:0;box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--tk-line) 72%,transparent)}
.theme-toggle .track-icon{position:absolute;top:50%;width:15px;height:15px;transform:translateY(-50%);color:var(--tk-muted);opacity:.8}
.theme-toggle .sun{left:8px}.theme-toggle .moon{right:8px}
.theme-toggle .knob{position:absolute;top:5px;left:5px;width:30px;height:30px;border:0;border-radius:50%;background:var(--tk-cyan);box-shadow:0 2px 7px rgba(28,62,80,.2);transition:transform .2s ease}
html[data-theme="dark"] .theme-toggle .knob{transform:translateX(24px)}
.game{
  min-height:0;width:100%;max-width:1040px;margin:0 auto;padding:14px 0 10px;
  display:grid;grid-template-rows:auto auto auto;justify-items:center;align-content:start;gap:11px;
}
.board-zone{width:100%;min-width:0;display:grid;place-items:center;overflow:visible}
.board-shell{
  width:calc(var(--board-size) + 22px);height:auto;max-width:100%;padding:10px;
  border:1px solid var(--tk-line-strong);border-radius:24px;
  background:color-mix(in srgb,var(--tk-panel) 88%,var(--tk-surface));box-shadow:var(--tk-shadow);
}
.board{
  width:var(--board-size);height:var(--board-size);max-width:100%;display:grid;margin:0 auto;overflow:hidden;
  border:2px solid var(--tk-text);border-radius:15px;background:var(--tk-line);box-shadow:none;
}
.cell{
  position:relative;min-width:0;min-height:0;padding:0;display:grid;place-items:center;cursor:pointer;
  color:var(--tk-text);background:var(--tk-surface);border:0;border-color:var(--tk-line)!important;box-shadow:none;touch-action:manipulation;
}
.cell.given{cursor:default;background:color-mix(in srgb,var(--tk-panel) 72%,var(--tk-surface))}
.cell.peer:not(.selected){background:color-mix(in srgb,var(--tk-cyan) 9%,var(--tk-surface))}
.cell.selected{z-index:2;background:color-mix(in srgb,var(--tk-cyan) 18%,var(--tk-surface));box-shadow:inset 0 0 0 3px var(--tk-cyan-dark)}
.cell.error{background:color-mix(in srgb,var(--tk-danger) 16%,var(--tk-surface));box-shadow:inset 0 0 0 3px var(--tk-danger)}
.cell.hint{box-shadow:inset 0 0 0 3px var(--tk-mint)}
.token{
  width:72%;height:72%;display:grid;place-items:center;border:2px solid currentColor;border-radius:50%;background:var(--tk-surface);box-shadow:0 5px 12px rgba(32,64,80,.08);
  font-size:calc(var(--cell-size)*.39);line-height:1;font-weight:1000;
}
.token.zero{color:#057592}.token.one{color:#9b3e17}
html[data-theme="dark"] .token.zero{color:#72deeb}html[data-theme="dark"] .token.one{color:#ffb185}
.cell.given .token{background:transparent;box-shadow:none}
.cell:not(.given) .token{outline:2px solid var(--tk-mint);outline-offset:2px}
.cycle-hint{
  width:100%;margin:0;padding:9px 12px;border:1px solid rgba(24,191,210,.28);border-radius:999px;
  color:var(--tk-cyan-dark);background:color-mix(in srgb,var(--tk-cyan) 9%,var(--tk-surface));text-align:center;font-size:11px;line-height:1.3;font-weight:900;
}
.control-row{width:100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.control-btn{
  min-width:0;min-height:52px;padding:9px 7px;border:1px solid var(--tk-line);border-radius:16px;
  color:var(--tk-text);background:var(--tk-surface);box-shadow:0 7px 17px rgba(42,66,82,.07);font-size:clamp(12px,3.2vw,16px);font-weight:950;cursor:pointer;text-shadow:none;
}
.control-btn.green{color:#075d4c;background:color-mix(in srgb,var(--tk-mint) 22%,var(--tk-surface));border-color:color-mix(in srgb,var(--tk-mint) 52%,var(--tk-line))}
.control-btn.red{color:#fff;background:var(--tk-danger);border-color:var(--tk-danger)}
html[data-theme="dark"] .control-btn.green{color:#bff8e7}html[data-theme="dark"] .control-btn.red{color:#481021}
.control-btn:active,.icon-btn:active{transform:scale(.97)}
.legal-footer{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;padding:8px 10px max(7px,env(safe-area-inset-bottom));color:var(--tk-muted);font-size:11px;letter-spacing:.02em}
.legal-footer a{color:inherit;text-decoration:none}.legal-footer a:hover{text-decoration:underline}
.modal{
  position:fixed;inset:0;z-index:1000;display:flex;align-items:flex-start;justify-content:center;
  padding:max(20px,env(safe-area-inset-top)) max(14px,env(safe-area-inset-right)) max(20px,env(safe-area-inset-bottom));
  overflow-y:auto;background:rgba(19,37,47,.62);backdrop-filter:blur(12px);transition:opacity .2s ease;
}
.modal.hidden{opacity:0;pointer-events:none}
.modal-card{width:min(100%,500px);margin:auto;padding:0;border:1px solid var(--tk-line-strong);border-radius:26px;background:var(--tk-surface);box-shadow:0 30px 80px rgba(20,44,56,.28);overflow:hidden}
.modal-inner{padding:clamp(22px,5vw,34px);border:0;border-radius:0;color:var(--tk-text);background:var(--tk-surface);text-align:center}
.modal h1{margin:0;color:var(--tk-text);font-size:clamp(34px,9vw,52px);line-height:1;font-weight:1000;letter-spacing:-.05em;text-shadow:none}
.modal p{max-width:40ch;margin:10px auto 20px;color:var(--tk-muted);line-height:1.48;font-weight:700;text-shadow:none}
.option-title{margin:15px 0 7px;text-align:left;color:var(--tk-muted);font-size:11px;font-weight:950;text-transform:uppercase;letter-spacing:.1em}
.option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.option-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.option-btn,.modal-btn{
  min-height:50px;border:1px solid var(--tk-line);border-radius:15px;color:var(--tk-text);background:var(--tk-surface-2);box-shadow:none;font-weight:950;cursor:pointer;
}
.option-btn.selected{color:#fff;background:linear-gradient(135deg,var(--tk-cyan-dark),var(--tk-cyan));border-color:var(--tk-cyan-dark)}
.modal-btn{width:100%;margin-top:10px;color:#fff;background:linear-gradient(135deg,var(--tk-cyan-dark),var(--tk-cyan),var(--tk-mint));border:0;font-size:16px}
.modal-btn.rules-btn{color:var(--tk-text);background:var(--tk-surface-2);border:1px solid var(--tk-line)}
.rules{display:none;margin-top:11px;padding:14px;border:1px solid var(--tk-line);border-radius:16px;color:var(--tk-text);background:var(--tk-surface-2);font-size:13px;line-height:1.5;text-align:left}.rules.open{display:block}.rules strong{color:var(--tk-text)}.rules ul{margin:8px 0 0;padding-left:20px}.rules li+li{margin-top:6px}
.loading{display:none;margin-top:12px;color:var(--tk-muted);font-weight:850}.loading.show{display:block}
.win-info{margin:16px 0 2px;padding:12px;border:1px solid var(--tk-line);border-radius:15px;color:var(--tk-text);background:var(--tk-surface-2);font-weight:900;text-shadow:none}
.win-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:14px}.win-actions .modal-btn{margin:0}.win-actions .rules-btn{background:var(--tk-surface-2)}
.toast{position:fixed;z-index:2000;left:50%;bottom:max(16px,env(safe-area-inset-bottom));transform:translate(-50%,18px);max-width:88vw;padding:10px 15px;border:1px solid var(--tk-line);border-radius:999px;color:var(--tk-text);background:var(--tk-surface);box-shadow:var(--tk-shadow);opacity:0;pointer-events:none;transition:.2s ease;text-align:center;font-weight:850;font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}.toast.error{color:#fff;background:var(--tk-danger)}.toast.success{color:#063f35;background:var(--tk-mint)}
@media (max-width:430px){
  .brand-sub{display:none}.topbar{min-height:56px;padding-block:7px}.icon-btn{width:40px;height:40px}.theme-toggle{height:40px;width:60px}.theme-toggle .knob{width:28px;height:28px}html[data-theme="dark"] .theme-toggle .knob{transform:translateX(22px)}
  .game{padding-top:10px;gap:8px}.board-shell{padding:7px;border-radius:18px;width:calc(var(--board-size) + 16px)}
  .control-row{gap:6px}.control-btn{min-height:48px;border-radius:14px;padding:7px 4px;font-size:12px}.cycle-hint{font-size:10px;padding:8px 10px}
  .win-actions{grid-template-columns:1fr}.option-grid.three{gap:5px}.option-btn{padding-inline:3px}
}
@media (min-width:700px) and (orientation:portrait){
  :root{--tk-header:78px}.topbar{padding-inline:20px}.brand-title{font-size:36px}.brand-sub{font-size:13px}.icon-btn,.theme-toggle{height:54px}.icon-btn{width:54px}.theme-toggle{width:82px}.theme-toggle .knob{width:40px;height:40px;top:6px;left:6px}html[data-theme="dark"] .theme-toggle .knob{transform:translateX(30px)}
  .game{gap:14px;padding-top:18px}.board-shell{padding:14px;width:calc(var(--board-size) + 30px);border-radius:30px}.cycle-hint{padding:13px 18px;font-size:15px}.control-row{gap:12px}.control-btn{min-height:68px;border-radius:20px;font-size:19px}
  .modal-card{max-width:680px}.modal-inner{padding:42px}.option-btn,.modal-btn{min-height:68px;font-size:19px}.option-title{font-size:14px}.modal p,.rules{font-size:17px}
}
@media (min-width:760px) and (orientation:landscape){
  :root{--tk-header:64px}
  .game{max-width:1060px;grid-template-columns:minmax(0,1fr) minmax(220px,280px);grid-template-rows:auto auto;column-gap:18px;row-gap:12px;align-items:center;align-content:center;padding:16px 0 10px}
  .board-zone{grid-column:1;grid-row:1/3;width:100%;min-width:0}
  .cycle-hint{grid-column:2;grid-row:1;align-self:end;border-radius:18px;padding:13px 14px;font-size:13px}
  .control-row{grid-column:2;grid-row:2;align-self:start;grid-template-columns:1fr;gap:9px}
  .control-btn{min-height:58px;font-size:16px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}
html.gq-takuzu .brand-title{text-shadow:none}
html.gq-takuzu .legal-footer{color:var(--tk-muted)}
html.gq-takuzu .theme-toggle{color:var(--tk-text);background:var(--tk-surface);border-color:var(--tk-line)}
html.gq-takuzu .cell{color:var(--tk-text);background:var(--tk-surface);box-shadow:none}
html.gq-takuzu .cell.peer:not(.selected){background:color-mix(in srgb,var(--tk-cyan) 9%,var(--tk-surface))}
html.gq-takuzu .option-btn.selected,
html.gq-takuzu .modal-btn:not(.rules-btn){color:#fff;background:#067f92;border-color:#067f92}
html[data-theme="dark"].gq-takuzu .option-btn.selected,
html[data-theme="dark"].gq-takuzu .modal-btn:not(.rules-btn){color:#102c35;background:#8ae8f1;border-color:#8ae8f1}
/* Die Zahl selbst bleibt bewusst flach und groß. Alte Token-Verläufe dürfen
   hier nicht mehr durch die höhere .token.one/.token.zero-Spezifität gewinnen. */
html.gq-takuzu .token,
html.gq-takuzu .token.zero,
html.gq-takuzu .token.one,
html.gq-takuzu .cell.given .token,
html.gq-takuzu .cell:not(.given) .token{
  width:100%;height:100%;border:0!important;border-radius:0;
  outline:0!important;background:transparent!important;box-shadow:none!important;
  font-size:calc(var(--cell-size)*.52);font-weight:1000;
}
html.gq-takuzu .token.zero{color:#075f78!important}
html.gq-takuzu .token.one{color:#87330f!important}
html[data-theme="dark"].gq-takuzu .token.zero{color:#8ae8f1!important}
html[data-theme="dark"].gq-takuzu .token.one{color:#ffc4a3!important}