:root{--bg:#f4f5f7;--panel-bg:#fff;--btn-bg:#fff;--cell-bg:#fff;--hover-bg:#0f172a0f;--line:#c3c9d4;--line-thick:#33404f;--text:#1e2733;--text-dim:#66707d;--given:#101820;--entry:#2563eb;--mark:#4b6584;--accent:#2563eb;--accent-soft:#2563eb2e;--conflict:#dc2626;--conflict-bg:#dc26261f;--peer-bg:#64748b1a;--toast-bg:#1e2733;--toast-text:#f4f6f9;--toast-kbd-bg:#ffffff29;--float-shadow:0 0 0 1px #0f172a0f, 0 2px 4px #0f172a0d, 0 12px 32px #0f172a29;--glass-bg:#ffffff8c;--glass-edge:inset 0 1px 0 #fff9;--glow:#0000000d;--cell:clamp(38px, 7.4vmin, 62px);--ease-out:cubic-bezier(.23, 1, .32, 1);--ease-pop:cubic-bezier(.34, 1.56, .64, 1)}[data-theme=dark]{--bg:#0a0a0b;--panel-bg:#19191c;--btn-bg:#232327;--cell-bg:#121214;--hover-bg:#ffffff12;--line:#37373d;--line-thick:#9c9ca4;--text:#ededef;--text-dim:#9b9ba3;--given:#fafafa;--entry:#7fb3ff;--mark:#a4a4ad;--accent:#60a5fa;--accent-soft:#60a5fa40;--conflict:#f87171;--conflict-bg:#f8717129;--peer-bg:#ffffff0e;--toast-bg:#f4f4f5;--toast-text:#18181b;--toast-kbd-bg:#0000001a;--float-shadow:0 0 0 1px #ffffff14, 0 2px 4px #00000059, 0 12px 32px #0000008c;--glass-bg:#18181c80;--glass-edge:inset 0 1px 0 #ffffff14;--glow:#ffffff0f}*{box-sizing:border-box}button{-webkit-tap-highlight-color:transparent;touch-action:manipulation;font-family:inherit}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}body{background:radial-gradient(620px 300px at 50% 102%, var(--glow), transparent 70%) var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;transition:background .2s}.app{flex-direction:column;min-height:100dvh;padding:16px 24px 0;display:flex}.header{align-items:center;gap:14px;width:100%;max-width:1100px;margin:0 auto;display:flex;position:relative}.header h1{letter-spacing:-.01em;margin:0;font-size:19px;font-weight:700}.solved-badge{color:#fff;animation:badge-pop .35s var(--ease-pop);background:#16a34a;border-radius:999px;padding:4px 12px;font-size:13px;font-weight:600}@keyframes badge-pop{0%{opacity:0;transform:scale(.9)}}.header-actions{gap:4px;margin-left:auto;display:flex}.icon-btn{width:34px;height:34px;color:var(--text-dim);cursor:pointer;transition:transform .16s var(--ease-out), background-color .15s ease, color .15s ease;background:0 0;border:none;border-radius:9px;place-items:center;font-size:16px;font-weight:600;display:grid}.icon-btn:hover{background:var(--hover-bg);color:var(--text)}.icon-btn:active{transform:scale(.96)}.theme-icon{grid-area:1/1;place-items:center;transition:opacity .2s cubic-bezier(.2,0,0,1),scale .2s cubic-bezier(.2,0,0,1),filter .2s cubic-bezier(.2,0,0,1);display:grid}.theme-icon:not(.show){opacity:0;filter:blur(4px);scale:.25}.help-pop{background:var(--panel-bg);width:320px;box-shadow:var(--float-shadow);transform-origin:100% 0;animation:pop-in .16s var(--ease-out);z-index:50;border-radius:14px;padding:14px 16px;position:absolute;top:calc(100% + 10px);right:0}.help-pop h2{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin:0 0 8px;font-size:11px;font-weight:700}.help-pop ul{color:var(--text-dim);margin:0;padding-left:16px;font-size:12.5px;line-height:2}.help-pop kbd{background:var(--bg);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-family:inherit;font-size:10px}@keyframes pop-in{0%{opacity:0;transform:scale(.96)translateY(-4px)}}.board-area{padding:20px 0 calc(96px + env(safe-area-inset-bottom,0px));flex:1;justify-content:safe center;align-items:safe center;display:flex}.board-wrap{-webkit-user-select:none;user-select:none}.board-row{display:flex}.col-handles{grid-template-columns:22px repeat(9, var(--cell));margin-bottom:2px;display:grid}.row-handles{grid-template-rows:repeat(9, var(--cell));border-top:2px solid #0000;width:22px;margin-right:2px;display:grid}.handle{color:var(--text-dim);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:0;font-size:11px;font-weight:600;transition:background-color .15s,color .15s}.handle:hover{background:var(--accent-soft);color:var(--accent)}.board{grid-template-columns:repeat(9, var(--cell));grid-template-rows:repeat(9, var(--cell));border:2px solid var(--line-thick);background:var(--cell-bg);touch-action:none;border-radius:3px;display:grid;box-shadow:0 4px 20px #141e2d1a}.cell{border-right:1px solid var(--line);border-bottom:1px solid var(--line);cursor:pointer;background:var(--cell-bg);justify-content:center;align-items:center;transition:background-color .15s;display:flex;position:relative}.cell:nth-child(9n){border-right:none}.cell:nth-child(n+73){border-bottom:none}.cell.thick-r{border-right:2px solid var(--line-thick)}.cell.thick-b{border-bottom:2px solid var(--line-thick)}.cell.peer:before{content:"";background:var(--peer-bg);pointer-events:none;position:absolute;inset:0}.cell.same-digit:before{content:"";pointer-events:none;background:#2563eb14;position:absolute;inset:0}.cell.selected:after{content:"";background:var(--accent-soft);box-shadow:inset 0 0 0 2.5px var(--accent);pointer-events:none;position:absolute;inset:0}.digit{font-size:calc(var(--cell) * .58);color:var(--entry);font-weight:500;line-height:1}.cell.given .digit{color:var(--given);font-weight:700}.cell.conflict .digit{color:var(--conflict)}.cell.conflict{background-image:linear-gradient(var(--conflict-bg), var(--conflict-bg))}.corner-mark{font-size:calc(var(--cell) * .22);color:var(--mark);font-weight:600;line-height:1;position:absolute}.pos-tl{top:8%;left:10%}.pos-tr{top:8%;right:10%}.pos-bl{bottom:8%;left:10%}.pos-br{bottom:8%;right:10%}.pos-tc{top:8%;left:50%;transform:translate(-50%)}.pos-bc{bottom:8%;left:50%;transform:translate(-50%)}.pos-lc{top:50%;left:10%;transform:translateY(-50%)}.pos-rc{top:50%;right:10%;transform:translateY(-50%)}.center-marks{font-size:calc(var(--cell) * .26);color:var(--mark);letter-spacing:.02em;font-weight:600}.center-marks.tight{font-size:calc(var(--cell) * .19)}.toast{bottom:calc(92px + env(safe-area-inset-bottom,0px));background:var(--toast-bg);color:var(--toast-text);box-shadow:var(--float-shadow);animation:toast-in .2s var(--ease-out);z-index:40;white-space:nowrap;border-radius:999px;padding:9px 18px;font-size:13px;font-weight:500;position:fixed;left:50%;transform:translate(-50%)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%)translateY(6px)}}.toolbar-wrap{left:50%;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:30;width:max-content;max-width:94vw;position:fixed;transform:translate(-50%)}.toolbar{background:var(--panel-bg);box-shadow:var(--float-shadow);border-radius:18px;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 2px;max-width:min(94vw,880px);padding:8px;transition:background .2s;display:flex}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.toolbar,.menu{background:var(--glass-bg);-webkit-backdrop-filter:blur(20px)saturate(1.7);backdrop-filter:blur(20px)saturate(1.7);box-shadow:var(--float-shadow), var(--glass-edge)}}.tb-group{align-items:center;gap:2px;display:flex}.tb-sep{background:var(--line);opacity:.7;flex:none;width:1px;height:24px;margin:0 6px}.tb-btn{width:38px;height:38px;color:var(--text);cursor:pointer;transition:transform .16s var(--ease-out), background-color .15s ease, color .15s ease, opacity .15s ease;background:0 0;border:none;border-radius:10px;place-items:center;display:grid;position:relative}.tb-btn:hover{background:var(--hover-bg)}.tb-btn:active{transform:scale(.96)}.tb-btn.selected{background:var(--accent-soft);color:var(--accent)}.tb-btn.done{opacity:.35}.tb-dim{color:var(--text-dim)}.tb-dim:hover{color:var(--text)}.tb-digit{font-size:16px;font-weight:600}.tb-digit .count{color:var(--text-dim);font-size:8.5px;font-weight:500;position:absolute;bottom:3px;right:6px}.digit-swatch{border-radius:6px;width:20px;height:20px;box-shadow:inset 0 0 0 1px #0000001f}.mi{place-items:center;width:22px;height:22px;font-size:16px;line-height:1;display:grid}.mi-given{font-weight:800}.mi-normal{color:var(--entry);font-weight:500}.tb-btn.selected .mi-normal{color:var(--accent)}.mi-box{opacity:.85;border:1.5px solid;border-radius:5px;width:20px;height:20px;position:relative}.mi-box i{font-size:7.5px;font-style:normal;font-weight:700;position:absolute;top:1px;left:3px}.mi-box b{font-size:7.5px;font-weight:700;position:absolute;bottom:1px;right:3px}.mi-box em{letter-spacing:.05em;font-size:7.5px;font-style:normal;font-weight:700}.mi-centered{place-items:center;display:grid}.mi-color{background:conic-gradient(#60a5fa,#4ade80,#facc15,#fb923c,#f87171,#a78bfa,#60a5fa);border-radius:50%;width:18px;height:18px;box-shadow:inset 0 0 0 1px #0000001a}.tt-wrap{display:inline-flex;position:relative}.tooltip{transform-origin:bottom;background:var(--toast-bg);color:var(--toast-text);white-space:nowrap;pointer-events:none;animation:tooltip-in .125s var(--ease-out);z-index:60;border-radius:7px;align-items:center;gap:6px;padding:5px 8px;font-size:11.5px;font-weight:500;line-height:1;display:flex;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);box-shadow:0 2px 8px #0000002e}.tooltip.instant{animation:none}.tooltip kbd{background:var(--toast-kbd-bg);border-radius:4px;padding:2px 4px;font-family:inherit;font-size:10px}@keyframes tooltip-in{0%{opacity:0;transform:translate(-50%)scale(.97)}}.menu{overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line) transparent;background:var(--panel-bg);min-width:224px;max-height:calc(100dvh - 122px);box-shadow:var(--float-shadow);transform-origin:100% 100%;animation:menu-in .16s var(--ease-out);z-index:50;border-radius:14px;padding:6px;position:absolute;bottom:calc(100% + 10px);right:0;overflow-y:auto}@keyframes menu-in{0%{opacity:0;transform:scale(.96)translateY(4px)}}.menu-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);padding:7px 10px 3px;font-size:10px;font-weight:700}.menu-item{text-align:left;width:100%;color:var(--text);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:7px 10px;font-size:13px;transition:background-color .12s;display:block}.menu-item:hover{background:var(--hover-bg)}.menu-item.danger{color:var(--conflict)}.menu-sep{background:var(--line);opacity:.55;height:1px;margin:6px 8px}.menu-check{color:var(--text-dim);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:7px 10px;font-size:12.5px;display:flex}.menu-check input{accent-color:var(--accent);margin:0}@media (width<=640px){.app{padding:12px 12px 0}.board-area{padding:12px 0 calc(186px + env(safe-area-inset-bottom,0px))}.toolbar{border-radius:17px}.tb-sep{display:none}.tb-group{flex-wrap:wrap;justify-content:center;max-width:100%}.tb-btn{border-radius:9px;width:32px;height:32px}.tb-digit{font-size:14px}.tb-digit .count{font-size:8px;bottom:2px;right:4px}.mi{transform:scale(.88)}.toast{bottom:calc(176px + env(safe-area-inset-bottom,0px));white-space:normal;text-align:center;max-width:92vw}}@media (prefers-reduced-motion:reduce){.solved-badge,.toast,.menu,.help-pop,.tooltip{animation-name:fade-only;animation-duration:.15s}@keyframes fade-only{0%{opacity:0}}.tb-btn:active,.icon-btn:active{transform:none}.theme-icon{transition:opacity .15s}.theme-icon:not(.show){filter:none;scale:none}.toast{transform:translate(-50%)}}