:root{
  color-scheme:light;
  --paper:#f4efe5;
  --paper-deep:#e9e1d3;
  --ink:#202521;
  --muted:#697168;
  --pine:#31584d;
  --pine-soft:#dfe8e0;
  --sun:#d79550;
  --rose:#c95f72;
  --line:rgba(32,37,33,.17);
  --line-strong:rgba(32,37,33,.72);
  --focus:#7350d8;
  --shadow:0 20px 60px rgba(39,46,39,.12);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{width:100%;min-height:100%;margin:0}
body{
  min-height:100dvh;
  overflow-x:hidden;
  background:
    radial-gradient(circle at 8% 10%,rgba(215,149,80,.16),transparent 26rem),
    radial-gradient(circle at 90% 86%,rgba(49,88,77,.14),transparent 30rem),
    var(--paper);
  color:var(--ink);
  font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  -webkit-tap-highlight-color:transparent;
}
button,a{font:inherit}
button{touch-action:manipulation}
a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
#fireworks{position:fixed;inset:0;z-index:30;width:100%;height:100%;pointer-events:none}
.game-header{
  position:relative;
  z-index:5;
  min-height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  padding:max(12px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) 12px max(20px,env(safe-area-inset-left));
  border-bottom:1px solid var(--line);
  background:rgba(244,239,229,.8);
  backdrop-filter:blur(18px);
}
.brand{justify-self:start;display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--pine-soft);font:700 13px/1 Georgia,serif;box-shadow:4px 4px 0 rgba(49,88,77,.18)}
.brand-copy{display:grid;gap:1px}
.brand-copy strong{font:600 16px/1.2 Georgia,"Times New Roman",serif}
.brand-copy span{color:var(--muted);font-size:10px;letter-spacing:.07em;text-transform:uppercase}
.status-bar{display:flex;align-items:center;gap:9px;padding:6px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.45)}
.status-bar>span{min-width:68px;padding:5px 11px;border-left:1px solid var(--line);text-align:center}
.status-bar>span:first-child{border-left:0}
.status-bar small{display:block;color:var(--muted);font-size:8px;letter-spacing:.12em;text-transform:uppercase}
.status-bar strong{display:block;margin-top:1px;font-size:13px;font-variant-numeric:tabular-nums}
.status-bar .difficulty{min-width:78px;border:0;border-radius:999px;background:var(--pine);color:#fff;font-size:10px;font-weight:800;letter-spacing:.11em;text-transform:uppercase}
.menu-icon{justify-self:end;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.48);color:var(--ink);font-size:16px;cursor:pointer}
.menu-icon:hover{border-color:var(--pine);background:var(--pine);color:#fff}
.game-layout{
  width:min(1120px,calc(100% - 36px));
  min-height:calc(100dvh - 72px);
  margin:auto;
  padding:clamp(20px,4vw,54px) 0;
  display:grid;
  grid-template-columns:minmax(0,650px) minmax(240px,310px);
  justify-content:center;
  align-items:center;
  gap:clamp(24px,4vw,54px);
}
.board-panel{display:grid;justify-items:center;gap:15px;min-width:0}
.board{
  width:min(100%,min(69vh,650px));
  aspect-ratio:1;
  display:grid;
  grid-template-columns:repeat(9,1fr);
  grid-template-rows:repeat(9,1fr);
  overflow:hidden;
  border:2px solid var(--line-strong);
  border-radius:14px;
  background:#fffdf8;
  box-shadow:var(--shadow),0 0 0 6px rgba(255,255,255,.3);
}
.cell{
  position:relative;
  display:grid;
  place-items:center;
  min-width:0;
  padding:0;
  border:0;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:transparent;
  color:var(--pine);
  font:600 clamp(18px,3vw,35px)/1 Georgia,"Times New Roman",serif;
  cursor:pointer;
  transition:background .12s,color .12s,transform .08s;
}
.cell:nth-child(3n){border-right:2px solid var(--line-strong)}
.cell:nth-child(9n){border-right:0}
.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--line-strong)}
.cell:nth-child(n+73){border-bottom:0}
.cell:hover{background:#f1eee5}
.cell:active{transform:scale(.96)}
.cell.given{color:var(--ink);font-weight:700;cursor:default}
.cell.peer{background:#eef2ec}
.cell.same{background:#dbe9df;color:#244d42}
.cell.selected{z-index:1;background:var(--pine)!important;color:#fff;box-shadow:inset 0 0 0 2px rgba(255,255,255,.35)}
.cell.wrong{background:#f9dfe3;color:#9b3045;animation:shake .22s linear}
.cell.hinted:not(.selected){background:#fff1d9;color:#9a5c1c}
.cell.complete:not(.selected){animation:pop .35s ease}
@keyframes shake{25%{transform:translateX(-3px)}75%{transform:translateX(3px)}}
@keyframes pop{50%{transform:scale(1.08)}}
.message{min-height:22px;margin:0;color:var(--muted);font-size:12px;text-align:center}
.message.error{color:#a43a50}.message.success{color:var(--pine);font-weight:700}
.controls-panel{display:grid;gap:18px;align-self:center}
.number-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.number-pad button{
  aspect-ratio:1.22;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(255,255,255,.6);
  color:var(--pine);
  font:600 25px/1 Georgia,"Times New Roman",serif;
  box-shadow:0 6px 16px rgba(39,46,39,.06);
  cursor:pointer;
  transition:transform .12s,background .12s,color .12s,border-color .12s;
}
.number-pad button:hover{border-color:var(--pine);background:var(--pine);color:#fff;transform:translateY(-2px)}
.number-pad button:focus-visible{border-color:var(--pine);background:var(--pine);color:#fff;transform:translateY(-2px)}
.number-pad button:disabled{opacity:.32;cursor:not-allowed;transform:none}
.utility-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.utility-actions button{
  min-height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--paper-deep);
  color:var(--ink);
  font-size:11px;
  font-weight:800;
  letter-spacing:.09em;
  text-transform:uppercase;
  cursor:pointer;
}
.utility-actions button:hover{border-color:var(--pine);background:#fff}
.utility-actions button:focus-visible{border-color:var(--pine);background:#fff}
.utility-actions button:disabled{opacity:.42;cursor:not-allowed}
.utility-actions span{font-size:16px;color:var(--pine)}
.progress-wrap{padding:15px 16px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.4)}
.progress-copy{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:10px;letter-spacing:.1em;text-transform:uppercase}
.progress-copy strong{color:var(--ink);font-variant-numeric:tabular-nums}
.progress-track{height:5px;margin-top:10px;overflow:hidden;border-radius:999px;background:rgba(32,37,33,.1)}
.progress-track i{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--pine),var(--sun));transition:width .25s ease}
.overlay{
  position:fixed;
  z-index:20;
  inset:0;
  display:grid;
  place-items:center;
  padding:18px max(16px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));
  background:rgba(28,34,29,.62);
  backdrop-filter:blur(12px);
  opacity:0;
  visibility:hidden;
  transition:opacity .2s,visibility .2s;
}
.overlay.visible{opacity:1;visibility:visible}
.menu-card{
  position:relative;
  width:min(680px,100%);
  max-height:calc(100dvh - 32px);
  overflow:auto;
  padding:clamp(27px,5vw,48px);
  border:1px solid rgba(255,255,255,.5);
  border-radius:22px;
  background:linear-gradient(160deg,#fbf8f1,#e9eee7);
  box-shadow:0 35px 120px rgba(0,0,0,.3);
  text-align:center;
}
.eyebrow{margin:0 0 10px;color:var(--pine);font-size:10px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
.menu-card h1{max-width:520px;margin:0 auto;font:500 clamp(38px,7vw,62px)/.98 Georgia,"Times New Roman",serif;letter-spacing:-.045em}
.menu-copy{max-width:500px;margin:18px auto 0;color:var(--muted);font-size:14px;line-height:1.6}
.difficulty-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:28px}
.difficulty-grid button{
  min-height:146px;
  display:grid;
  justify-items:center;
  align-content:center;
  gap:6px;
  padding:18px 12px;
  border:1px solid var(--line);
  border-radius:16px;
  background:rgba(255,255,255,.58);
  color:var(--ink);
  cursor:pointer;
  transition:transform .15s,border-color .15s,background .15s,box-shadow .15s;
}
.difficulty-grid button:hover{transform:translateY(-3px);border-color:var(--pine);background:#fff;box-shadow:0 12px 26px rgba(49,88,77,.1)}
.difficulty-grid button:focus-visible{transform:translateY(-3px);border-color:var(--pine);background:#fff;box-shadow:0 12px 26px rgba(49,88,77,.1)}
.difficulty-icon{color:var(--pine);font-size:25px}
.difficulty-grid strong{font:600 22px/1 Georgia,"Times New Roman",serif}
.difficulty-grid small{max-width:130px;color:var(--muted);font-size:10px;line-height:1.4}
.result-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:22px}
.result-summary>div{padding:12px 8px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.48)}
.result-summary span{display:block;color:var(--muted);font-size:8px;letter-spacing:.11em;text-transform:uppercase}
.result-summary strong{display:block;margin-top:3px;font-size:14px}
.menu-footer{display:flex;justify-content:center;align-items:center;gap:16px;margin-top:21px}
.menu-footer a,.resume-game{color:var(--pine);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.menu-footer a{text-underline-offset:4px}
.resume-game{padding:0;border:0;background:none;text-decoration:underline;text-underline-offset:4px;cursor:pointer}
.generating{position:absolute;inset:0;display:grid;place-items:center;margin:0;border-radius:inherit;background:rgba(251,248,241,.93);color:var(--pine);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
@media(max-width:820px){
  .game-header{grid-template-columns:1fr auto auto;gap:8px;min-height:64px;padding:10px max(12px,env(safe-area-inset-right)) 10px max(12px,env(safe-area-inset-left))}
  .brand-copy span{display:none}.brand-mark{width:34px;height:34px}.status-bar{gap:3px;padding:4px}.status-bar>span{min-width:53px;padding:4px 7px}.status-bar .difficulty{min-width:61px;font-size:8px}.status-bar small{font-size:7px}.status-bar strong{font-size:11px}.menu-icon{width:38px;height:38px}
  .game-layout{width:min(100% - 24px,650px);min-height:calc(100dvh - 64px);padding:16px 0 22px;grid-template-columns:1fr;gap:15px;align-content:start}
  .board{width:min(100%,calc(100dvh - 330px));min-width:280px}
  .cell{font-size:clamp(18px,7vw,31px)}
  .controls-panel{width:100%;gap:10px}
  .number-pad{grid-template-columns:repeat(9,1fr);gap:5px}
  .number-pad button{aspect-ratio:1;border-radius:10px;font-size:19px}
  .utility-actions{grid-template-columns:1fr 1fr;gap:7px}.utility-actions button{min-height:43px}
  .progress-wrap{padding:11px 13px}.message{font-size:11px}
}
@media(max-width:520px){
  .brand-copy{display:none}.status-bar .difficulty{display:none}
  .game-layout{width:calc(100% - 18px);padding-top:10px;gap:9px}
  .board{width:min(100%,calc(100dvh - 295px));min-width:270px;border-width:2px;border-radius:12px}
  .cell:nth-child(3n){border-right-width:2px}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom-width:2px}
  .number-pad{gap:3px}.number-pad button{border-radius:8px;font-size:17px}
  .utility-actions button{min-height:39px;font-size:9px}.progress-wrap{padding:9px 11px}
  .difficulty-grid{grid-template-columns:1fr;margin-top:20px}.difficulty-grid button{min-height:82px;grid-template-columns:auto auto;grid-template-rows:auto auto;column-gap:11px;padding:12px 18px;text-align:left}.difficulty-icon{grid-row:1/3;font-size:23px}.difficulty-grid strong,.difficulty-grid small{justify-self:start}.difficulty-grid strong{font-size:19px}.difficulty-grid small{max-width:none}
  .menu-card{padding:27px 20px;border-radius:20px}.menu-copy{font-size:12px}.result-summary{gap:5px}.menu-footer{flex-direction:column;gap:10px}
}
@media(max-width:400px){
  .number-pad{grid-template-columns:repeat(3,1fr);gap:6px}
  .number-pad button{min-height:44px;aspect-ratio:2.4;font-size:18px}
}
@media(orientation:landscape) and (max-height:620px){
  .game-header{position:fixed;left:0;right:0;top:0;min-height:48px;padding:5px max(9px,env(safe-area-inset-right)) 5px max(9px,env(safe-area-inset-left));background:rgba(244,239,229,.9)}
  .brand-mark{width:31px;height:31px}.brand-copy span{display:none}.status-bar>span{padding-block:2px}.menu-icon{width:34px;height:34px}
  .game-layout{width:min(980px,calc(100% - 24px));min-height:100dvh;padding:57px 0 8px;grid-template-columns:minmax(0,calc(100dvh - 69px)) minmax(270px,390px);gap:20px;align-items:center}
  .board{width:min(100%,calc(100dvh - 69px));min-width:0}
  .board-panel{gap:4px}.message{min-height:15px;font-size:9px}
  .controls-panel{gap:8px}.number-pad{grid-template-columns:repeat(3,1fr);gap:6px}.number-pad button{aspect-ratio:1.6;font-size:20px}.utility-actions button{min-height:36px}.progress-wrap{padding:8px 11px}
  .menu-card{width:min(90vw,720px);padding:20px 26px}.menu-card h1{font-size:40px}.menu-copy{margin-top:9px;font-size:12px}.difficulty-grid{margin-top:15px}.difficulty-grid button{min-height:108px}.result-summary{margin-top:12px}.menu-footer{margin-top:12px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}