:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}html,body{color:#e5e7eb;background:#0b1220;min-height:100vh;margin:0;padding:0}*{box-sizing:border-box}button{font-family:inherit}.app{color:#e5e7eb;-webkit-user-select:none;user-select:none;max-width:480px;margin:0 auto;padding:24px 16px 64px;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.header{text-align:center;margin-bottom:14px}.header h1{letter-spacing:.02em;margin:0 0 8px;font-size:28px;font-weight:600}.tagline{color:#9ca3af;margin:0;font-size:13px;line-height:1.5}.tagline-more{margin-top:4px}.link-button{color:#60a5fa;font-size:inherit;cursor:pointer;background:0 0;border:none;padding:0;font-family:inherit;text-decoration:underline}.link-button:hover{color:#93c5fd}.difficulty-tabs{background:#1f2937;border-radius:10px;gap:6px;margin-bottom:12px;padding:4px;display:flex}.difficulty-tab{color:#9ca3af;cursor:pointer;background:0 0;border:none;border-radius:7px;flex:1;padding:8px 12px;font-size:13px;font-weight:600;transition:background-color .1s,color .1s}.difficulty-tab:hover{color:#e5e7eb}.difficulty-tab.active{color:#fff;background:#2563eb}.score-bar{background:#1f2937;border-radius:10px;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;margin-bottom:16px;padding:10px 8px;display:grid}.score-bar .score-cluster{grid-template-columns:1fr 1fr;align-items:start;gap:12px;min-width:0;display:grid}.score-bar .score-cluster .stat,.score-bar .score-cluster.left,.score-bar .score-cluster.right{justify-self:center}.score-bar .stat{min-width:0;max-width:100%}.score-bar .stat .value{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.puzzle-nav{background:#1f2937;border-radius:10px;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;padding:8px 10px;display:flex}.puzzle-nav>.btn-sm{flex:0 84px;min-width:0;padding:6px 10px;font-size:12px;font-weight:600}.puzzle-nav>.btn-stacked{flex-direction:column;align-items:center;gap:1px;line-height:1.1;display:flex}.puzzle-nav .btn-emoji{font-size:16px}.puzzle-nav .btn-text{letter-spacing:.02em;font-size:11px}.puzzle-nav-center{flex:auto;justify-content:center;align-items:center;gap:4px;min-width:0;display:flex}.puzzle-nav .nav-arrow{color:#e5e7eb;cursor:pointer;touch-action:manipulation;background:#111827;border:none;border-radius:6px;flex:0 0 30px;height:30px;padding:0;font-size:13px;font-weight:600}.puzzle-nav .nav-arrow:disabled{color:#4b5563;cursor:not-allowed}.puzzle-nav .puzzle-id{color:#e5e7eb;cursor:pointer;white-space:nowrap;text-align:center;text-overflow:ellipsis;background:0 0;border:none;border-radius:6px;flex:1;min-width:0;padding:4px 8px;font-family:inherit;font-size:13px;font-weight:600;line-height:1.2;overflow:hidden}.puzzle-nav .puzzle-id-secondary{color:#9ca3af;font-weight:500}.puzzle-nav .puzzle-id:hover:not(:disabled){background:#111827}.puzzle-nav .puzzle-id:disabled{cursor:default}.score-bar .stat{text-align:center;min-width:32px;padding:2px 4px}.score-bar .stat .label{color:#9ca3af;text-transform:uppercase;letter-spacing:.05em;font-size:11px}.score-bar .stat .value{font-variant-numeric:tabular-nums;color:#e5e7eb;font-size:20px;font-weight:700}.score-bar .stat.focal{box-sizing:border-box;background:#1e3a8a;border:1px solid #3b82f6;border-radius:6px;max-width:100%;padding:4px 8px}.score-bar .stat.focal .label{color:#93c5fd}.score-bar .stat.focal .value{color:#fff;font-size:24px}.score-bar .stat.optimal .value,.score-bar .stat.tier-perfect .value{color:#34d399}.score-bar .stat.tier-mid .value{color:#fbbf24}.score-bar .stat.tier-low .value{color:#f87171}@media (width<=400px){.score-bar .stat .value{font-size:17px}.score-bar .stat.focal .value{font-size:20px}.score-bar .stat .label{font-size:10px}.puzzle-nav>.btn-sm{flex-basis:72px;padding:6px 8px;font-size:11px}.puzzle-nav .puzzle-id{white-space:normal;flex-direction:column;justify-content:center;align-items:center;gap:1px;padding:4px;font-size:12px;line-height:1.15;display:flex}.puzzle-nav .puzzle-id-primary{font-size:13px;font-weight:700}.puzzle-nav .puzzle-id-secondary{font-size:11px}.puzzle-nav .puzzle-id-sep{display:none}.puzzle-nav .nav-arrow{flex:0 0 26px;height:26px;font-size:11px}}.puzzle-nav-date-input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.footer{text-align:center;color:#6b7280;border-top:1px solid #1f2937;justify-content:center;align-items:center;gap:6px;margin-top:32px;padding-top:16px;font-size:12px;display:flex}.footer-sep{color:#4b5563}.footer-link{color:#6b7280;cursor:pointer;background:0 0;border:none;padding:4px 8px;font-family:inherit;font-size:12px}.footer-link:hover{color:#9ca3af}.terms-card .terms-body{color:#d1d5db;margin:12px 0;font-size:13px;line-height:1.5}.terms-card .terms-body p{margin:8px 0}.modal-card.htp-card{max-width:min(620px,92vw);max-height:80vh;overflow-y:auto}.htp-body{color:#d1d5db;margin:12px 0;font-size:13px;line-height:1.55}.htp-body p{margin:10px 0}.htp-body ul{margin:6px 0 10px;padding-left:20px}.htp-body li{margin:4px 0}.htp-body code{background:#111827;border-radius:3px;padding:1px 4px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.htp-body .htp-meta{color:#6b7280;border-top:1px solid #374151;margin-top:14px;padding-top:10px;font-size:12px}.modal-card.report-card{max-width:min(500px,92vw)}.report-body{color:#d1d5db;margin:12px 0;font-size:13px;line-height:1.55}.report-body p{margin:10px 0}.report-prompt{color:#9ca3af}.report-textarea{box-sizing:border-box;color:#e5e7eb;resize:vertical;background:#111827;border:1px solid #374151;border-radius:8px;width:100%;min-height:110px;padding:10px 12px;font-family:inherit;font-size:13px;line-height:1.5}.report-textarea::placeholder{color:#6b7280}.report-textarea:focus{border-color:#3b82f6;outline:none}.report-textarea:disabled{opacity:.6}.report-error{color:#f87171;margin:8px 0 0;font-size:12px}.grid{touch-action:pan-y;background:#111827;border-radius:12px;gap:5px;margin-bottom:16px;padding:8px;display:grid}.cell{aspect-ratio:1;font-variant-numeric:tabular-nums;color:#d1d5db;cursor:pointer;background:#1f2937;border-radius:8px;justify-content:center;align-items:center;font-size:clamp(14px,5vw,22px);font-weight:600;transition:background-color 80ms,transform 80ms;display:flex;position:relative}.cell.neg{color:#f87171}.cell.op-mul{color:#22d3ee;background:#0e3a4a}.cell.op-div{color:#c084fc;background:#3b1e5c}.cell.op-mul .cell-value,.cell.op-div .cell-value{font-size:.9em}.cell.in-path,.cell.in-path.op-mul,.cell.in-path.op-div{color:#fff;background:#2563eb;transform:scale(.97)}.cell.in-path.neg{color:#fecaca}.cell.corner-option{outline-offset:-2px;outline:2px solid #fbbf24;animation:2s ease-in-out infinite cornerPulse}@keyframes cornerPulse{0%,to{outline-color:#fbbf24}50%{outline-color:#fef3c7}}.cell.picked-start{outline-offset:-2px;outline:2px solid #fbbf24}.cell.goal{outline-offset:-2px;outline:2px solid #fb7185}.cell.in-optimal{color:#6ee7b7;background:#064e3b}.cell.in-previous{color:#93c5fd;background:#2563eb38}.cell.in-previous.neg{color:#fca5a5}.cell.is-hint{outline-offset:-2px;outline:2px solid #34d399}.cell.is-hint .cell-value{color:#6ee7b7}.hint-arrow.arrow-up{border-bottom-color:#34d399}.hint-arrow.arrow-down{border-top-color:#34d399}.hint-arrow.arrow-left{border-right-color:#34d399}.hint-arrow.arrow-right{border-left-color:#34d399}.cell-arrow{pointer-events:none;z-index:5;filter:drop-shadow(0 0 2px #00000080);width:0;height:0;position:absolute}.arrow-up{border-bottom:9px solid #fff;border-left:7px solid #0000;border-right:7px solid #0000;top:-8px;left:50%;transform:translate(-50%)}.arrow-down{border-top:9px solid #fff;border-left:7px solid #0000;border-right:7px solid #0000;bottom:-8px;left:50%;transform:translate(-50%)}.arrow-left{border-top:7px solid #0000;border-bottom:7px solid #0000;border-right:9px solid #fff;top:50%;left:-8px;transform:translateY(-50%)}.arrow-right{border-top:7px solid #0000;border-bottom:7px solid #0000;border-left:9px solid #fff;top:50%;right:-8px;transform:translateY(-50%)}.cell-step{color:#ffffffb3;font-size:10px;font-weight:500;position:absolute;top:4px;right:6px}.controls{flex-direction:column;align-items:stretch;gap:8px;margin-bottom:20px;display:flex}.controls-row{justify-content:center;gap:8px;display:flex}.controls-row.four-up .btn{white-space:normal;word-break:break-word;flex:1 1 0;min-width:0;padding:10px 8px;font-size:14px;font-weight:600;line-height:1.2}.btn{cursor:pointer;text-align:center;border:none;border-radius:8px;padding:10px 20px;font-size:15px;font-weight:600;transition:background-color .1s,opacity .1s}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{color:#fff;background:#2563eb}.btn-primary:hover:not(:disabled){background:#1d4ed8}.btn-primary.dimmed:not(:disabled){color:#cbd5e1;background:#334155}.btn-primary.dimmed:hover:not(:disabled){background:#475569}.btn-secondary{color:#e5e7eb;background:#374151}.btn-secondary:hover:not(:disabled){background:#4b5563}.btn-tertiary{color:#9ca3af;background:0 0;border:1px solid #374151}.btn-tertiary:hover:not(:disabled){color:#e5e7eb;background:#1f2937}.btn-danger{color:#fff;background:#dc2626}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-warning{color:#fff;background:#d97706}.btn-warning:hover:not(:disabled){background:#b45309}.modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;background:#080c18b8;justify-content:center;align-items:center;padding:16px;animation:.15s modalFade;display:flex;position:fixed;inset:0}.modal-card{background:#1f2937;border:1px solid #374151;border-radius:14px;width:100%;max-width:380px;padding:24px;animation:.2s cubic-bezier(.16,1,.3,1) modalSlideUp;box-shadow:0 24px 64px #0009}.modal-title{color:#e5e7eb;margin:0 0 8px;font-size:18px;font-weight:600}.modal-lead{color:#9ca3af;margin:0 0 16px;font-size:13px;line-height:1.5}.modal-stats{gap:12px;margin:16px 0 20px;display:flex}.modal-stat{text-align:center;background:#111827;border-radius:10px;flex:1;padding:12px}.modal-stat-label{text-transform:uppercase;letter-spacing:.06em;color:#6b7280;margin-bottom:4px;font-size:10px}.modal-stat-value{color:#fbbf24;font-variant-numeric:tabular-nums;font-size:22px;font-weight:600}.modal-stat-sep{color:#4b5563;margin:0 2px;font-weight:400}.modal-stat-sub{color:#9ca3af;margin-top:2px;font-size:11px}.modal-actions{justify-content:flex-end;gap:10px;display:flex}@keyframes modalFade{0%{opacity:0}to{opacity:1}}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.share-box{text-align:center;background:#1f2937;border-radius:10px;margin-top:8px;padding:16px}.share-headline{color:#34d399;margin-bottom:8px;font-size:16px;font-weight:600}.share-preview{letter-spacing:0;text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;color:#e5e7eb;background:#111827;border-radius:8px;margin:12px 0;padding:12px;font-family:Apple Color Emoji,Segoe UI Emoji,Noto Color Emoji,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.35}.share-actions{gap:8px;display:flex}.share-actions .btn{flex:1}.share-toggle{color:#9ca3af;cursor:pointer;justify-content:center;align-items:center;gap:8px;margin:8px 0 4px;font-size:12px;display:flex}.share-toggle input[type=checkbox]{accent-color:#2563eb}.share-sub{color:#6b7280;margin-top:2px;font-size:11px}