:root{--bg:#0f1117;--panel:#171a23;--panel-2:#1e222d;--border:#2a2f3a;--text:#d6dae3;--text-dim:#8b93a3;--text-h:#f3f5f9;--accent:#7c9cff;--accent-2:#5cd6b3;--gold:#ffd24a;--danger:#ff6b6b;--warn:#ffb454;--on-accent:#0b0e16;--mono:ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace;--sans:system-ui, "Segoe UI", Roboto, sans-serif;font-family:var(--sans);color:var(--text);background:var(--bg);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;-webkit-font-smoothing:antialiased}:root[data-theme=light]{--bg:#f5f7fb;--panel:#fff;--panel-2:#eceff5;--border:#d6dce6;--text:#2a2f3a;--text-dim:#5b6470;--text-h:#0f1320;--accent:#3b5bdb;--accent-2:#0c8f72;--gold:#c98a00;--danger:#d64545;--warn:#b9760f;--on-accent:#fff;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}body{min-height:100svh;margin:0}h1,h2,h3{color:var(--text-h);margin:0;font-weight:600}a{color:var(--accent)}code{font-family:var(--mono);font-size:.85em}button{cursor:pointer;font-family:inherit}select{font-family:inherit}.intro{border:1px solid var(--border);background:linear-gradient(#7c9cff12,#7c9cff05);border-radius:12px;margin-top:22px;padding:20px 22px;position:relative}.intro h2{margin-bottom:14px;font-size:17px}.intro-close{color:var(--text-dim);background:0 0;border:none;font-size:22px;line-height:1;position:absolute;top:10px;right:12px}.intro-close:hover{color:var(--text-h)}.intro-steps{grid-template-columns:repeat(3,1fr);gap:16px;margin:0;padding:0;list-style:none;display:grid}@media (width<=760px){.intro-steps{grid-template-columns:1fr}}.intro-steps li{color:var(--text);gap:12px;font-size:14px;line-height:1.45;display:flex}.intro-num{background:var(--accent);width:26px;height:26px;color:var(--on-accent);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:14px;font-weight:700;display:flex}.intro em{color:var(--accent-2);font-style:normal}.engine-loader{background:#ffb4540f;border:1px solid #ffb45459;border-radius:10px;margin-top:18px;padding:14px 16px}.engine-loader-bar{background:var(--panel-2);border-radius:999px;height:6px;overflow:hidden}.engine-loader-fill{background:linear-gradient(90deg, var(--warn), var(--accent));border-radius:999px;width:35%;height:100%;animation:1.3s ease-in-out infinite engine-indeterminate}@keyframes engine-indeterminate{0%{margin-left:-35%}to{margin-left:100%}}.engine-loader-text{flex-direction:column;gap:2px;margin-top:10px;display:flex}.engine-loader-text strong{color:var(--text-h);font-size:14px;font-weight:600}.engine-loader-text span{color:var(--text-dim);font-size:13px}.mf-wrap{flex-direction:column;align-items:center;gap:14px;display:flex}.mf-grid{aspect-ratio:1;background:var(--border);border-radius:10px;gap:4px;width:min(420px,70vw);padding:4px;display:grid}.mf-cell{background:var(--panel-2);border-radius:6px;justify-content:center;align-items:center;font-size:clamp(14px,3.2vw,26px);line-height:1;transition:background .2s;display:flex}.mf-obstacle{background:#0a0c12 repeating-linear-gradient(45deg,#14171f 0 6px,#0a0c12 6px 12px)}.mf-robot-cell{box-shadow:inset 0 0 0 2px var(--accent);background:#7c9cff2e}.mf-robot{color:var(--accent);font-weight:700}.mf-gold{color:var(--gold);filter:drop-shadow(0 0 4px #ffd24a80)}.mf-legend{color:var(--text-dim);flex-wrap:wrap;align-items:center;gap:18px;font-size:13px;display:flex}.mf-legend>span{align-items:center;gap:6px;display:inline-flex}.mf-obstacle-swatch{background-image:repeating-linear-gradient(45deg,#14171f 0 4px,#0a0c12 4px 8px);border-radius:3px;width:14px;height:14px;display:inline-block}.mf-progress{color:var(--gold);margin-left:auto}.viz{margin-top:18px}.viz-controls{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.viz-btn{background:var(--panel-2);color:var(--text-h);border:1px solid var(--border);border-radius:8px;padding:7px 12px;font-size:14px}.viz-btn:hover:not(:disabled){border-color:var(--accent)}.viz-btn:disabled{opacity:.4;cursor:not-allowed}.viz-play{min-width:92px;font-weight:600}.viz-slider{min-width:160px;accent-color:var(--accent);flex:1}.viz-counter{color:var(--text-dim);text-align:right;min-width:96px;font-size:13px}.viz-action{align-items:center;gap:12px;margin:14px 0 10px;display:flex}.viz-action-code{background:var(--panel-2);border:1px solid var(--accent);color:var(--accent);border-radius:8px;padding:6px 12px;font-size:14px}.viz-action-init{color:var(--text-dim);font-style:italic}.viz-goal-badge{color:var(--accent-2);background:#5cd6b326;border:1px solid #5cd6b380;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600}.viz-body{display:block}.viz-body.viz-has-grid{grid-template-columns:auto 1fr;align-items:start;gap:28px;display:grid}@media (width<=760px){.viz-body.viz-has-grid{grid-template-columns:1fr}}.viz-grid-pane{padding-top:6px}.viz-diff{flex-wrap:wrap;gap:6px;margin-bottom:14px;display:flex}.viz-facts-title{text-transform:uppercase;letter-spacing:.5px;color:var(--text-dim);margin-bottom:8px;font-size:12px}.viz-facts{flex-wrap:wrap;gap:6px;margin-bottom:8px;display:flex}.viz-fact{font-family:var(--mono);background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:3px 8px;font-size:12.5px}.viz-added{color:var(--accent-2);background:#5cd6b321;border-color:#5cd6b380}.viz-deleted{color:#ff9b9b;background:#ff6b6b1a;border-color:#ff6b6b73;text-decoration:line-through}.viz-goal{margin-top:16px}.viz-goal-row{color:var(--text-dim);margin-bottom:6px;margin-right:6px;display:inline-block}.viz-goal-met{color:var(--accent-2);border-color:#5cd6b380}.viz-warn{color:var(--warn);margin-top:14px;font-size:13px}.cmp{border:1px solid var(--border);background:var(--panel);border-radius:10px;padding:18px 20px}.cmp-head{align-items:baseline;gap:12px;display:flex}.cmp-head h2{font-size:18px}.cmp-progress{color:var(--warn);font-size:13px}.cmp-note{color:var(--text-dim);margin:8px 0 14px;font-size:13px}.cmp-best-key{color:var(--accent-2);font-weight:600}.cmp-scroll{overflow-x:auto}.cmp-table{border-collapse:collapse;width:100%;font-size:14px}.cmp-table th,.cmp-table td{text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;padding:9px 12px}.cmp-table th{text-transform:uppercase;letter-spacing:.4px;color:var(--text-dim);font-size:12px;font-weight:600}.cmp-label{color:var(--text-h)}.cmp-best{color:var(--accent-2);font-weight:700}.cmp-unsolved{color:var(--text-dim)}.cmp-tag{color:var(--accent);background:#7c9cff24;border:1px solid #7c9cff66;border-radius:999px;padding:2px 8px;font-size:11px}.cmp-view{background:var(--panel-2);border:1px solid var(--border);color:var(--accent);border-radius:7px;padding:5px 10px;font-size:13px}.cmp-view:hover{border-color:var(--accent)}.epi{background:#7c9cff0f;border:1px solid #7c9cff66;border-radius:10px;padding:18px 20px}.epi-head{flex-wrap:wrap;align-items:baseline;gap:12px;display:flex}.epi-head h2{font-size:18px}.epi-tag{border:1px solid var(--border);background:var(--panel-2);color:var(--text-dim);border-radius:999px;padding:3px 10px;font-size:12px}.epi-lead{color:var(--text);max-width:80ch;margin:12px 0 4px;font-size:14px;line-height:1.55}.epi-lead code,.epi-note code{background:var(--panel-2);border:1px solid var(--border);color:var(--accent-2);border-radius:5px;padding:1px 6px}.epi-sub{color:var(--text-h);margin:20px 0 10px;font-size:14px}.epi-pipe{flex-wrap:wrap;align-items:stretch;gap:4px;display:flex}.epi-stepwrap{align-items:center;gap:4px;display:flex}.epi-step{background:var(--panel-2);border:1px solid var(--border);border-radius:8px;min-width:110px;padding:8px 12px}.epi-step-label{color:var(--text-h);font-size:13.5px;font-weight:600}.epi-step-sub{color:var(--text-dim);margin-top:2px;font-size:11.5px}.epi-arrow{color:var(--accent);padding:0 2px;font-size:18px}.epi-note{color:var(--text-dim);max-width:80ch;margin:12px 0 0;font-size:13px;line-height:1.55}.epi-links{color:var(--text);gap:8px;margin:6px 0 0;padding-left:20px;font-size:13.5px;line-height:1.5;display:grid}.epi-roadmap{border-top:1px solid var(--border);margin-top:16px;padding-top:12px}.app{max-width:1200px;margin:0 auto;padding:28px 24px 64px}@media (width<=600px){.app{padding:18px 14px 48px}.app-header h1{font-size:24px}.field select{width:100%;min-width:0}.field{flex:100%}}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.app-header h1{letter-spacing:-.5px;font-size:30px}.subtitle{color:var(--text-dim);max-width:60ch;margin-top:6px}.header-right{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.theme-toggle{border:1px solid var(--border);background:var(--panel);color:var(--text);white-space:nowrap;border-radius:999px;padding:6px 12px;font-size:13px}.theme-toggle:hover{border-color:var(--accent);color:var(--text-h)}.engine-badge{border:1px solid var(--border);background:var(--panel);color:var(--text-dim);white-space:nowrap;border-radius:999px;padding:6px 12px;font-size:13px}.engine-ready{color:var(--accent-2);border-color:#5cd6b366}.engine-loading-runtime,.engine-installing-planner{color:var(--warn);border-color:#ffb45466}.engine-error{color:var(--danger);border-color:#ff6b6b66}.toolbar{flex-wrap:wrap;align-items:flex-end;gap:16px;margin-top:24px;display:flex}.field{color:var(--text-dim);flex-direction:column;gap:6px;font-size:13px;display:flex}.field select{background:var(--panel-2);color:var(--text-h);border:1px solid var(--border);border-radius:8px;min-width:240px;padding:9px 12px;font-size:14px}.solve-btn{background:var(--accent);color:var(--on-accent);border:none;border-radius:8px;padding:10px 22px;font-size:15px;font-weight:600;transition:filter .15s}.solve-btn:hover:not(:disabled){filter:brightness(1.08)}.solve-btn:disabled{opacity:.5;cursor:not-allowed}.compare-btn{background:var(--panel-2);color:var(--text-h);border:1px solid var(--accent);border-radius:8px;padding:10px 18px;font-size:14px;font-weight:600}.compare-btn:hover:not(:disabled){background:#7c9cff1f}.compare-btn:disabled{opacity:.5;cursor:not-allowed}.cmp+.plan-panel{margin-top:20px}.toggle{color:var(--text-dim);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding-bottom:9px;font-size:13px;display:inline-flex}.toggle input{accent-color:var(--accent);width:15px;height:15px}.solver-desc{color:var(--text-dim);max-width:90ch;margin:14px 2px 0;font-size:14px}.compiled-note{color:var(--accent);background:#7c9cff1a;border:1px solid #7c9cff66;border-radius:10px;margin-bottom:18px;padding:12px 16px;font-size:13.5px}.editors{grid-template-columns:1fr 1fr;gap:16px;margin-top:20px;display:grid}@media (width<=860px){.editors{grid-template-columns:1fr}}.editor{border:1px solid var(--border);background:var(--panel);border-radius:10px;overflow:hidden}.editor-label{color:var(--text-dim);background:var(--panel-2);border-bottom:1px solid var(--border);letter-spacing:.4px;text-transform:uppercase;justify-content:space-between;align-items:center;gap:12px;padding:8px 14px;font-size:13px;font-weight:600;display:flex}.editor-invalid{border-color:#ff6b6b80}.editor-error{color:var(--danger);text-transform:none;letter-spacing:0;font-size:12px;font-weight:500}.actions-bar{flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px;display:flex}.action-btn{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:7px 12px;font-size:13px}.action-btn:hover{border-color:var(--accent);color:var(--text-h)}.share-msg{color:var(--accent-2);font-size:13px}.plan-actions{align-items:center;gap:18px;display:flex}.results{margin-top:24px}.result-error,.result-warn{border-radius:10px;padding:14px 16px;font-size:14px}.result-error{color:#ffd5d5;background:#ff6b6b14;border:1px solid #ff6b6b59}.result-error pre{white-space:pre-wrap;color:#ffb0b0;margin:8px 0}.result-warn{color:#ffe2bd;background:#ffb45414;border:1px solid #ffb45459}.hint{color:var(--text-dim);margin-top:8px;font-size:13px}.plan-panel{border:1px solid var(--border);background:var(--panel);border-radius:10px;padding:18px 20px}.plan-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.plan-header h2{font-size:18px}.stat-chips{flex-wrap:wrap;gap:8px;display:flex}.chip{background:var(--panel-2);border:1px solid var(--border);color:var(--text-dim);border-radius:999px;padding:4px 10px;font-size:12px}.plan-list{gap:6px;margin:16px 0 8px;padding-left:28px;display:grid}.plan-list li{color:var(--text)}.plan-list code{background:var(--panel-2);border:1px solid var(--border);color:var(--accent-2);border-radius:6px;padding:3px 8px}.plan-details{border-top:1px solid var(--border);margin-top:18px;padding-top:12px}.plan-details summary{cursor:pointer;color:var(--text-dim);font-size:13px}.link-btn{color:var(--accent);background:0 0;border:none;margin-top:12px;padding:4px 0;font-size:13px;display:block}.solver-log{border:1px solid var(--border);font-family:var(--mono);color:var(--text-dim);white-space:pre-wrap;background:#0b0e16;border-radius:8px;max-height:280px;margin-top:10px;padding:12px;font-size:12px;overflow:auto}.app-footer{border-top:1px solid var(--border);color:var(--text-dim);margin-top:40px;padding-top:16px;font-size:13px}