/* SCHATZ SUDOKUS — Oberfläche „Nachtschicht“ */
:root{
  --bg:#10131A; --panel:#171B24; --panel2:#1E232E; --ink:#E9ECF3; --mut:#8E97A8;
  --line:#282E3B; --amber:#E9A63F; --teal:#48B49F; --red:#E86A5A;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--ink); line-height:1.5;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  display:grid; grid-template-rows:auto 1fr;
}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}

/* ---------- Kopfleiste ---------- */
.top{display:flex;align-items:center;gap:16px;padding:12px 20px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:9px;font-family:inherit;font-weight:800;font-size:15.5px;letter-spacing:.02em}
.logo .dot{width:9px;height:9px;border-radius:2px;background:var(--amber);box-shadow:0 0 10px rgba(233,166,63,.55)}
.tabs{display:flex;gap:3px}
.tabs button{font:inherit;font-size:13px;cursor:pointer;color:var(--mut);padding:5px 13px;border-radius:6px;border:0;background:transparent;transition:.14s}
.tabs button:hover{color:var(--ink)}
.tabs button.on{background:var(--panel2);color:var(--ink);font-weight:600}
.badge{margin-left:auto;font-size:11.5px;color:var(--teal);border:1px solid rgba(72,180,159,.35);background:rgba(72,180,159,.09);border-radius:999px;padding:3px 12px;font-variant-numeric:tabular-nums}

/* ---------- Flächen ---------- */
.pane{display:none;min-height:0}
.pane.on{display:grid}
#pane-gen{grid-template-columns:1fr 342px}
.stage{display:flex;flex-direction:column;align-items:center;gap:14px;padding:26px 22px 34px;overflow:auto}
.paper{container-type:inline-size;width:min(100%,520px)}
.pagerow{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:center}
.pagerow s{width:22px;height:31px;border-radius:3px;border:1px solid var(--line);background:var(--panel2);text-decoration:none;cursor:pointer}
.pagerow s.on{border-color:var(--amber);background:rgba(233,166,63,.14)}
.pagerow em{font-style:normal;font-size:11.5px;color:var(--mut);margin-left:6px;font-variant-numeric:tabular-nums}

/* ---------- Steuerspalte ---------- */
.rail{border-left:1px solid var(--line);background:var(--panel);padding:18px;display:flex;flex-direction:column;gap:17px;overflow:auto}
.h{font-family:inherit;font-weight:600;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--mut);display:flex;justify-content:space-between;align-items:baseline}
.h em{font-style:normal;letter-spacing:.02em;text-transform:none;font-size:10.5px;font-family:inherit}
.grp{display:flex;flex-direction:column;gap:9px}
.foot{font-size:11px;color:var(--mut);margin:-3px 0 0;line-height:1.45}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.tiles button{font:inherit;font-size:12.5px;font-weight:500;cursor:pointer;text-align:left;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--panel2);color:var(--ink);transition:.14s;display:flex;flex-direction:column;gap:1px}
.tiles button em{font-style:normal;font-size:10px;font-weight:400;color:var(--mut)}
.tiles button:hover{border-color:rgba(233,166,63,.5)}
.tiles button.is-on{border-color:var(--amber);background:rgba(233,166,63,.12)}
.tiles button.is-on em{color:var(--amber)}
.list{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.list button{font:inherit;font-size:13px;cursor:pointer;display:flex;align-items:center;gap:9px;padding:7px 11px;border:0;border-bottom:1px solid var(--line);background:var(--panel2);color:var(--mut);text-align:left;transition:.14s}
.list button:last-child{border-bottom:0}
.list button:hover{color:var(--ink)}
.list .tick{width:15px;height:15px;border-radius:4px;border:1px solid var(--line);flex:none;display:grid;place-items:center;background:var(--bg)}
.list button.is-on{background:rgba(233,166,63,.13);color:var(--ink);font-weight:600}
.list button.is-on .tick{background:var(--amber);border-color:var(--amber)}
.list button.is-on .tick::after{content:"";width:7px;height:4px;border-left:1.6px solid #171B24;border-bottom:1.6px solid #171B24;transform:rotate(-45deg) translateY(-1px)}
.list button b{margin-left:auto;font-weight:400;font-size:10.5px;color:var(--mut);text-align:right}
.list button.is-on b{color:var(--amber)}
.seg{display:grid;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel2)}
.seg.five{grid-template-columns:repeat(5,1fr)}
.seg.three{grid-template-columns:repeat(3,1fr)}
.seg.four{grid-template-columns:repeat(4,1fr)}
.seg button{font:inherit;font-size:12.5px;font-weight:600;cursor:pointer;padding:8px 2px;border:0;border-right:1px solid var(--line);background:transparent;color:var(--mut);transition:.14s;font-variant-numeric:tabular-nums}
.seg button:last-child{border-right:0}
.seg button:hover{color:var(--ink)}
.seg button.is-on{background:var(--amber);color:#171B24}
.seg.is-locked button:not(.is-on){opacity:.32;pointer-events:none}
.free{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--mut)}
.step{display:flex;align-items:center;gap:3px;margin-left:auto}
.step button{font:inherit;font-size:14px;line-height:1;cursor:pointer;width:23px;height:23px;border-radius:6px;border:1px solid var(--line);background:var(--panel2);color:var(--ink)}
.step button:hover{border-color:var(--amber);color:var(--amber)}
.step b{font-variant-numeric:tabular-nums;min-width:28px;text-align:center;font-size:13px;color:var(--ink)}
.sw{display:flex;align-items:center;justify-content:space-between;font-size:13px;padding:6px 0}
.sw + .sw{border-top:1px solid var(--line)}
.toggle{width:32px;height:18px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);position:relative;flex:none;cursor:pointer;padding:0}
.toggle::after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:var(--mut);transition:.2s}
.toggle.on{background:rgba(72,180,159,.25);border-color:var(--teal)}
.toggle.on::after{left:16px;background:var(--teal)}
.actions{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding-top:4px}
.btn{font:inherit;font-size:14px;font-weight:700;cursor:pointer;padding:12px;border-radius:9px;border:0;background:var(--amber);color:#171B24;box-shadow:0 6px 20px rgba(233,166,63,.2)}
.btn[disabled]{opacity:.55;cursor:default;box-shadow:none}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none;font-weight:500}
.bar{height:4px;border-radius:2px;background:var(--panel2);overflow:hidden}
.bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--teal),var(--amber));transition:width .2s}
.status{font-size:11.5px;color:var(--mut);text-align:center;min-height:1.2em}

/* ---------- Der Bogen: exakte A4-Geometrie ---------- */
.sheet{
  position:relative; aspect-ratio:210/297; background:#fff; color:#111;
  box-shadow:0 1px 2px rgba(8,11,18,.5),0 16px 40px rgba(8,11,18,.45);
  overflow:hidden;
}
.sheet.busy::after{
  content:attr(data-busy); position:absolute; inset:0; display:grid; place-items:center;
  color:#8A93A0; font-size:13px;
}
.puz{position:absolute}
.sgrid{display:grid;aspect-ratio:1;background:#fff;border:.1415em solid #111}
.sgrid.n9{grid-template-columns:repeat(9,1fr)}
.sgrid.n6{grid-template-columns:repeat(6,1fr)}
.sgrid i,.samurai i{
  display:grid;place-items:center;font-style:normal;line-height:1;font-weight:700;
  font-family:Helvetica,Arial,"Helvetica Neue",sans-serif;color:#111;border:0 solid #111;
}
.sgrid i.rt{border-right:.0705em solid #8a8a8a}
.sgrid i.rb{border-right:.1415em solid #111}
.sgrid i.bt{border-bottom:.0705em solid #8a8a8a}
.sgrid i.bb{border-bottom:.1415em solid #111}
.sgrid i.tint{background:#ededed}
.samurai{display:grid;grid-template-columns:repeat(21,1fr);aspect-ratio:1}
.samurai i{background:#fff}
.samurai i.off{background:transparent}
.samurai i.rt{border-right:.0705em solid #8a8a8a}
.samurai i.rb{border-right:.1415em solid #111}
.samurai i.bt{border-bottom:.0705em solid #8a8a8a}
.samurai i.bb{border-bottom:.1415em solid #111}
.samurai i.lb{border-left:.1415em solid #111}
.samurai i.tb{border-top:.1415em solid #111}
.cap{
  display:flex;justify-content:space-between;gap:.6em;padding-top:.55em;
  font-family:Helvetica,Arial,sans-serif;color:#222;line-height:1;
}
.cap button{font:inherit;color:#111;background:none;border:0;padding:0;cursor:pointer;text-decoration:underline dotted;text-underline-offset:.2em}
.cap button:hover{color:#B87A00}
.solution .sgrid i,.solution .samurai i{color:#8f98a6;font-weight:400}
.solution .sgrid i.given,.solution .samurai i.given{color:#111;font-weight:700}

/* ---------- Lösungssuche ---------- */
#pane-sol{place-content:start center;padding:34px 22px 44px;overflow:auto}
.sol{width:min(100%,560px);display:flex;flex-direction:column;gap:18px}
.sol h2{font-family:inherit;font-weight:600;font-size:22px;margin:0;letter-spacing:-.02em}
.sol .hint{margin:0;font-size:13.5px;color:var(--mut);max-width:52ch}
.sol form{display:flex;gap:8px;flex-wrap:wrap}
.sol input{font-family:ui-monospace,"SFMono-Regular",Menlo,monospace;font-size:22px;letter-spacing:.14em;flex:1;min-width:170px;padding:11px 14px;border-radius:9px;border:1px solid var(--line);background:var(--panel2);color:var(--ink)}
.sol input::placeholder{color:#5A6272}
.sol input:focus{border-color:var(--amber);outline:none}
.sol .err{margin:0;font-size:13px;color:var(--red)}
.solcard{border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}
.solmeta{display:flex;gap:14px;flex-wrap:wrap;align-items:baseline;padding:12px 15px;border-bottom:1px solid var(--line)}
.solmeta strong{font-family:ui-monospace,Menlo,monospace;font-size:15px;color:var(--amber);font-weight:500}
.solmeta span{font-size:12.5px;color:var(--mut)}
.solmeta span b{color:var(--ink);font-weight:600}
.solbody{background:#fff;padding:20px;container-type:inline-size}
.solbody .puz{position:static;width:100%!important}
.solbody .cap{display:none}
.sollegend{display:flex;gap:16px;font-size:12px;color:var(--mut);padding:10px 15px;border-top:1px solid var(--line)}

@media (max-width:900px){
  #pane-gen{grid-template-columns:1fr}
  .rail{border-left:0;border-top:1px solid var(--line)}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}