:root{--aile-accent:#6bbe8e;--aile-accent-dark:#4f9d72;--aile-bg:#f4f6f5;--aile-fg:#14181f;--aile-muted:#7a8290;--aile-card:#ffffff;--aile-border:rgba(20,24,31,0.1);--aile-danger:#e5645f;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}@media (prefers-color-scheme:dark){:root{--aile-bg:#10141a;--aile-fg:#f2f5f8;--aile-muted:#8b95a5;--aile-card:#1a2029;--aile-border:rgba(255,255,255,0.12)}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{margin:0;padding:0;height:100%;background:var(--aile-bg);color:var(--aile-fg);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,system-ui,sans-serif;overscroll-behavior:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}button{font-family:inherit;cursor:pointer}.app{display:flex;flex-direction:column;min-height:100dvh;padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--aile-accent);color:#fff}.topbar h1{font-size:17px;font-weight:600;margin:0}.icon-btn{width:36px;height:36px;border-radius:18px;border:none;background:rgba(255,255,255,.18);color:#fff;font-size:16px;display:grid;place-items:center}.tabs{display:flex;background:var(--aile-card);border-bottom:1px solid var(--aile-border)}.tabs button{flex:1 1;padding:12px 8px;background:none;color:var(--aile-muted);font-size:14px;font-weight:600;border:none;border-bottom:2px solid transparent}.tabs button[data-active=true]{color:var(--aile-accent);border-bottom-color:var(--aile-accent)}.content{flex:1 1;padding:16px;overflow-y:auto;-webkit-overflow-scrolling:touch}.card{background:var(--aile-card);border:1px solid var(--aile-border);border-radius:16px;padding:16px}.btn{padding:12px 18px;border-radius:12px;border:none;background:var(--aile-accent);color:#fff;font-size:15px;font-weight:600}.btn:active{background:var(--aile-accent-dark)}.btn.ghost{background:transparent;color:var(--aile-fg);border:1px solid var(--aile-border)}.btn:disabled{opacity:.45}.muted{color:var(--aile-muted)}.sheet{position:fixed;inset:0;background:rgba(0,0,0,.45);display:grid;place-items:center;padding:24px;z-index:50}.sheet>div{border-radius:20px;padding:24px;max-width:360px;text-align:center}.board,.sheet>div{background:var(--aile-card);width:100%}.board{display:grid;grid-template-columns:repeat(9,1fr);aspect-ratio:1;max-width:420px;margin:0 auto;border:2px solid var(--aile-fg);border-radius:10px;overflow:hidden}.cell{position:relative;border:none;border-right:1px solid var(--aile-border);border-bottom:1px solid var(--aile-border);background:var(--aile-card);display:grid;place-items:center;padding:0;transition:background .12s ease}.cell[data-right=true]{border-right:2px solid var(--aile-fg)}.cell[data-bottom=true]{border-bottom:2px solid var(--aile-fg)}.cell .value{font-size:clamp(16px,5.2vw,24px);font-weight:500;color:var(--aile-accent-dark)}.cell[data-given=true] .value{color:var(--aile-fg);font-weight:600}.cell[data-peer=true]{background:color-mix(in srgb,var(--aile-accent) 10%,var(--aile-card))}.cell[data-same=true]{background:color-mix(in srgb,var(--aile-accent) 24%,var(--aile-card))}.cell[data-selected=true]{background:color-mix(in srgb,var(--aile-accent) 38%,var(--aile-card))}.cell[data-conflict=true] .value{color:var(--aile-danger)}.cell[data-conflict=true]{background:color-mix(in srgb,var(--aile-danger) 18%,var(--aile-card))}.notes{display:grid;grid-template-columns:repeat(3,1fr);width:100%;height:100%;font-size:clamp(7px,2.1vw,10px);color:var(--aile-muted);line-height:1}.notes i{display:grid;place-items:center;font-style:normal}.keypad{max-width:420px;margin:18px auto 0;display:flex;flex-direction:column;gap:14px}.tools{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:8px;gap:8px}.tool{display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 4px;border-radius:12px;border:1px solid var(--aile-border);background:var(--aile-card);color:var(--aile-muted);font-size:11px;font-weight:600}.tool span{font-size:17px}.tool[data-active=true]{background:var(--aile-accent);border-color:var(--aile-accent);color:#fff}.tool:disabled{opacity:.4}.digits{display:grid;grid-template-columns:repeat(9,1fr);grid-gap:5px;gap:5px}.digit{position:relative;aspect-ratio:.72;border-radius:10px;border:1px solid var(--aile-border);background:var(--aile-card);color:var(--aile-fg);font-size:clamp(17px,5vw,22px);font-weight:600;display:grid;place-items:center}.digit:active{background:color-mix(in srgb,var(--aile-accent) 25%,var(--aile-card))}.digit i{position:absolute;bottom:3px;font-style:normal;font-size:9px;font-weight:500;color:var(--aile-muted)}.digit:disabled{opacity:.3}.status{display:flex;justify-content:space-between;align-items:center;max-width:420px;margin:0 auto 12px;font-size:13px;color:var(--aile-muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.status strong{color:var(--aile-fg);font-weight:600}.difficulty-grid{display:grid;grid-gap:10px;gap:10px;max-width:420px;margin:0 auto}.difficulty-grid button{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-radius:16px;border:1px solid var(--aile-border);background:var(--aile-card);color:var(--aile-fg);font-size:16px;font-weight:600}.difficulty-grid button span{color:var(--aile-muted);font-size:13px;font-weight:500}