/* 스도쿠 생성기 — '스도쿠 책상'. 작업면 폭 컨테이너 sdw: 600px 이상이면 [판 칸 | 옆 칸 clamp(216px, 34%, 268px)],
   그 아래는 판 칸 → 옆 칸(460px 이상 2열, 아래 1열). 판은 컨테이너 sdb 라서 칸 글자 크기 = 판 폭 ÷ 칸 수 비율 */
.sdk-work{container:sdw/inline-size;overflow:hidden}
.sdk-work [hidden]{display:none !important}
.sdk-vh{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.sdk-in{display:grid;grid-template-columns:minmax(0,1fr)}

/* 판 칸 */
.sdk-stage{--sdk-w:100%;min-width:0;display:flex;flex-direction:column;align-items:center;gap:10px;padding:14px 18px 14px;background:var(--card)}
.sdk-stage > *{width:var(--sdk-w);max-width:100%}
.sdk-head{display:flex;align-items:center;gap:6px 10px;min-width:0}
.sdk-lvb{display:inline-flex;align-items:baseline;gap:6px;min-width:0;height:32px;padding:0 10px;border:1px solid var(--soft);border-radius:var(--radius);background:var(--paper);font-family:var(--sans);font-size:13px;color:var(--ink);white-space:nowrap;transition:background var(--ease)}
.sdk-lvb:hover{background:var(--btn)}
.sdk-lvb b{font-weight:750;overflow:hidden;text-overflow:ellipsis}
.sdk-lvb span{font-size:12px;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums lining-nums}
.sdk-clock{margin-left:auto;font-family:var(--sans);font-size:15px;font-weight:750;font-variant-numeric:tabular-nums lining-nums;color:var(--ink);white-space:nowrap}
.sdk-mk{font-family:var(--sans);font-size:12.5px;font-weight:600;color:var(--muted);white-space:nowrap}
.sdk-mk b{color:var(--ink);font-variant-numeric:tabular-nums}
.sdk-mk.is-hit b{color:var(--accent)}
.sdk-icb{flex:none;width:32px;padding:0;justify-content:center}
.sdk-icb.is-on{background:var(--fill);border-color:var(--fill);color:var(--on-fill)}

.sdk-board{--sdk-ln:color-mix(in srgb,var(--line) 60%,var(--soft));position:relative;container:sdb/inline-size}
.sdk-grid{display:grid;grid-template-columns:repeat(var(--n,9),minmax(0,1fr));border:2px solid var(--ink);border-radius:var(--radius);background:var(--card);outline:0;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.sdk-c{position:relative;display:grid;place-items:center;aspect-ratio:1;min-width:0;border-right:1px solid var(--sdk-ln);border-bottom:1px solid var(--sdk-ln);font-family:var(--sans);font-size:calc(100cqi / var(--n,9) * .56);font-weight:550;line-height:1;font-variant-numeric:tabular-nums lining-nums;color:var(--muted);cursor:pointer;outline:0;transition:background-color .18s ease}
.sdk-c.is-bR{border-right:2px solid var(--ink)}
.sdk-c.is-bB{border-bottom:2px solid var(--ink)}
.sdk-c.is-eR{border-right:0}
.sdk-c.is-eB{border-bottom:0}
.sdk-c.is-g{color:var(--ink);font-weight:800}
.sdk-c.is-peer{background:color-mix(in srgb,var(--ink) 6%,var(--card))}
.sdk-c.is-same{background:color-mix(in srgb,var(--fill) 34%,var(--card))}
.sdk-c.is-sel{background:var(--accent-wash);box-shadow:inset 0 0 0 2px var(--accent)}
.sdk-grid:focus-visible .sdk-c.is-sel{box-shadow:inset 0 0 0 3px var(--accent)}
.sdk-c.is-bad,.sdk-c.is-dup{color:var(--accent)}
.sdk-c.is-bad{background:color-mix(in srgb,var(--accent) 13%,var(--card))}
.sdk-c.is-sol{color:color-mix(in srgb,var(--muted) 70%,var(--card));font-weight:500}
/* 힌트 강조: 근거 단위(옅게) · 근거 칸 · 지울 칸(점선) · 놓을 칸 */
.sdk-c.is-hu{background:color-mix(in srgb,var(--accent) 7%,var(--card))}
.sdk-c.is-hh{background:color-mix(in srgb,var(--accent) 18%,var(--card))}
.sdk-c.is-hx{box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 55%,var(--card));background-image:repeating-linear-gradient(135deg,transparent 0 5px,color-mix(in srgb,var(--accent) 12%,transparent) 5px 7px)}
.sdk-c.is-hp{box-shadow:inset 0 0 0 3px var(--accent)}
/* 메모: 칸 안 작은 격자(4: 2×2, 6: 3×2, 9: 3×3) */
.sdk-nt{position:absolute;inset:5%;display:grid;grid-template-columns:repeat(var(--bw,3),minmax(0,1fr));align-items:center;justify-items:center;font-size:calc(100cqi / var(--n,9) * .21);font-weight:650;line-height:1;color:var(--muted);pointer-events:none}
.sdk-nt i{font-style:normal}
.sdk-nt i.is-x{color:var(--accent);text-decoration:line-through}
.sdk-veil{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-radius:var(--radius)}
.sdk-veil p{margin:0;font-family:var(--serif);font-size:20px;font-weight:800}

/* 숫자 줄: 판 열과 같은 칸 수, 남은 개수 고리 */
.sdk-pad{container:sdp/inline-size;display:grid;grid-template-columns:repeat(var(--n,9),minmax(0,1fr));gap:4px}
.sdk-k{position:relative;display:grid;place-items:center;min-width:0;height:48px;padding:0;border:1px solid var(--soft);border-radius:var(--radius);background:var(--paper);color:var(--ink);font-family:var(--sans);transition:background var(--ease),opacity var(--ease)}
.sdk-k:hover{background:var(--btn)}
.sdk-k svg{position:absolute;inset:50% auto auto 50%;width:34px;height:34px;margin:-17px 0 0 -17px;transform:rotate(-90deg);pointer-events:none}
.sdk-k circle{fill:none;stroke-width:2.4}
.sdk-k .sdk-r0{stroke:var(--soft)}
.sdk-k .sdk-r1{stroke:var(--ink);stroke-linecap:round;transition:stroke-dashoffset .45s cubic-bezier(.3,.7,.3,1)}
.sdk-k b{position:relative;font-size:19px;font-weight:750;line-height:1;font-variant-numeric:tabular-nums lining-nums}
.sdk-k small{position:absolute;top:2px;right:4px;font-size:10.5px;font-weight:650;color:var(--muted);font-variant-numeric:tabular-nums}
.sdk-k.is-done{opacity:.42}
.sdk-k.is-done .sdk-r1{stroke:var(--muted)}
.is-note .sdk-k b{font-size:14px;font-weight:650;color:var(--muted)}
.is-reduce .sdk-k .sdk-r1{transition:none}

/* 도구 줄 */
.sdk-tools{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}
.sdk-tools button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-width:0;height:50px;padding:0 2px;border:1px solid var(--soft);border-radius:var(--radius);background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:11.5px;font-weight:650;line-height:1.15;transition:background var(--ease),color var(--ease)}
.sdk-tools button:hover{background:var(--btn)}
.sdk-tools button span{max-width:100%;overflow-wrap:anywhere;text-align:center}
.sdk-tools .i{width:18px;height:18px}
.sdk-tools button[aria-pressed="true"],.sdk-tools button.is-on{background:var(--fill);border-color:var(--fill);color:var(--on-fill)}
.sdk-tools button:disabled{opacity:.42;cursor:not-allowed}

/* 알림·힌트 설명 */
.sdk-msg{min-height:40px;font-family:var(--sans);font-size:13px;line-height:1.55;color:var(--ink)}
.sdk-msg p{margin:0}
.sdk-msg .is-muted{color:var(--muted)}
.sdk-msg ol{margin:0;padding:0;list-style:none}
.sdk-msg li{margin:0 0 3px}
.sdk-msg li b{display:inline-block;margin-right:6px;padding:0 6px;border-radius:var(--radius);background:var(--wash);font-size:11.5px;font-weight:750;line-height:19px;color:var(--ink)}
.sdk-msg li.is-key b{background:var(--accent);color:var(--paper)}
.sdk-msg details{margin:0 0 4px;color:var(--muted)}
.sdk-msg summary{cursor:pointer;font-size:12px;font-weight:600;color:var(--muted)}
.sdk-msg details ol{margin:4px 0 2px;padding-left:2px}
.sdk-msg .is-err{color:var(--accent)}

/* 옆 칸 */
.sdk-side{min-width:0;display:grid;grid-template-columns:minmax(0,1fr);gap:16px;align-content:start;padding:14px 16px 18px;border-top:1px solid var(--soft)}
.sdk-grp{min-width:0}
.sdk-grp > .v2-label{display:block;margin:0 0 6px}
.sdk-size{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0 0 6px}
.sdk-size button{padding:0 4px;font-variant-numeric:tabular-nums}
.sdk-lvs{display:grid;grid-template-columns:repeat(var(--lc,2),minmax(0,1fr));gap:5px}
.sdk-lvs button{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:1px;min-width:0;min-height:44px;padding:5px 8px;border:1px solid var(--soft);border-radius:var(--radius);background:var(--paper);color:var(--ink);text-align:left;transition:background var(--ease),border-color var(--ease),color var(--ease)}
.sdk-lvs button:hover{background:var(--btn)}
.sdk-lvs b{max-width:100%;font-family:var(--sans);font-size:12.5px;font-weight:750;line-height:1.25;overflow-wrap:anywhere}
.sdk-lvs small{max-width:100%;font-family:var(--sans);font-size:11px;line-height:1.3;color:var(--muted);overflow-wrap:anywhere}
.sdk-lvs button[aria-pressed="true"]{background:var(--fill);border-color:var(--fill);color:var(--on-fill)}
.sdk-lvs button[aria-pressed="true"] small{color:var(--on-fill);opacity:.8}
.sdk-newb{margin:8px 0 0}
.sdk-new{width:100%;justify-content:center}
.sdk-new.is-busy{opacity:.75;cursor:progress}

.sdk-nums{margin:0}
.sdk-nums > div{display:flex;align-items:baseline;justify-content:space-between;gap:10px;min-width:0;padding:6px 0;border-top:1px solid var(--soft)}
.sdk-nums > div:last-child{border-bottom:1px solid var(--soft)}
.sdk-nums dt{flex:none;font-family:var(--sans);font-size:12px;font-weight:600;color:var(--muted)}
.sdk-nums dd{min-width:0;margin:0;font-family:var(--sans);font-size:13.5px;font-weight:750;line-height:1.35;text-align:right;font-variant-numeric:tabular-nums lining-nums;color:var(--ink);overflow-wrap:anywhere}
.sdk-nums dd small{margin-left:6px;font-size:11.5px;font-weight:600;color:var(--muted)}
.sdk-nums .sdk-id{font-family:var(--mono);font-size:13px;letter-spacing:0}
.sdk-tl{margin:12px 0 6px;font-family:var(--sans);font-size:11px;font-weight:600;color:var(--muted)}
.sdk-tech{display:grid;grid-template-columns:fit-content(58%) minmax(36px,1fr) auto;gap:5px 8px;align-items:center;margin:0;padding:0;list-style:none}
.sdk-tech li{display:grid;grid-column:1/-1;grid-template-columns:subgrid;align-items:center;font-family:var(--sans);font-size:12px;line-height:1.3}
.sdk-tech li span{min-width:0;color:var(--ink);overflow-wrap:anywhere}
.sdk-tech li i{display:block;height:8px;border-radius:1px;background:var(--wash);overflow:hidden}
.sdk-tech li i::after{content:"";display:block;width:var(--w,0%);height:100%;background:color-mix(in srgb,var(--fill) 75%,var(--muted));transition:width .55s cubic-bezier(.3,.7,.3,1)}
.sdk-tech li b{font-weight:750;font-variant-numeric:tabular-nums;text-align:right}
.sdk-tech li.is-top span{font-weight:750}
.sdk-tech li.is-top i::after{background:var(--ink)}
.is-reduce .sdk-tech li i::after{transition:none}

.sdk-sw{display:grid;gap:9px}
.sdk-pp{display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 10px;align-items:center}
.sdk-ppl{font-family:var(--sans);font-size:12px;font-weight:600;color:var(--muted);white-space:nowrap}
.sdk-pp .v2-seg{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.sdk-pp .v2-seg button{padding:0 4px;font-variant-numeric:tabular-nums}
.sdk-ppn{margin:6px 0 8px;font-family:var(--sans);font-size:11.5px;line-height:1.45;color:var(--muted)}
.sdk-out .v2-switch{margin:0 0 10px}
.sdk-outs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
.sdk-outs .v2-btn{justify-content:center;min-width:0;padding:0 6px}
.sdk-outs .v2-btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

@container sdw (min-width:600px){
  .sdk-in{grid-template-columns:minmax(0,1fr) clamp(216px,34%,268px)}
  .sdk-side{border-top:0;border-left:1px solid var(--soft)}
}
@container sdw (min-width:460px) and (max-width:599.98px){
  .sdk-side{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 18px}
  .sdk-lvs{--lc:3}
}
@container sdw (max-width:459.98px){
  .sdk-lvs{--lc:3}
  .sdk-stage{padding:12px 12px 12px}
}
@container sdp (max-width:330px){
  .sdk-k svg{width:28px;height:28px;margin:-14px 0 0 -14px}
  .sdk-k b{font-size:16px}
  .sdk-k small{font-size:9.5px;top:1px;right:2px}
}

/* 움직임: 새 퍼즐 단서가 차례로 놓임 · 행·열·상자 완성 물결 · 완성 물결 */
@keyframes sdkPop{from{opacity:0;transform:scale(.55)}to{opacity:1;transform:none}}
@keyframes sdkFlash{0%{background-color:color-mix(in srgb,var(--fill) 70%,var(--card))}100%{background-color:transparent}}
.sdk-c.is-pop{animation:sdkPop .3s cubic-bezier(.3,.7,.3,1) var(--dl,0s) both}
.sdk-c.is-flash{animation:sdkFlash .75s ease var(--dl,0s) both}
.is-reduce .sdk-c{animation:none !important;transition:none}

/* 전체 화면(또는 API 없을 때 고정 보기): 판 폭 = 화면 높이에서 머리·숫자·도구 줄을 뺀 값 */
.sdk-stage:fullscreen{--sdk-w:min(94vw,calc(100dvh - 250px));justify-content:center;padding:16px}
.sdk-stage.is-fs{--sdk-w:min(94vw,calc(100dvh - 250px));position:fixed;inset:0;z-index:1000;justify-content:center;padding:16px}
.sdk-stage:-webkit-full-screen{--sdk-w:min(94vw,calc(100vh - 250px));justify-content:center;padding:16px}