:root{--bg: #0d0d0f;--panel: #161618;--panel-2: #1d1d20;--ink: #ededee;--muted: #8a8a8f;--border: #26262a;--accent: #3b82f6;--accent-ink: #ffffff;--good: #4ade80;--bad: #ef4444;--shadow: 0 1px 2px rgba(0, 0, 0, .35);--chrome-bg: #1d1d20;--chrome-bg-2: #2a2a2e;--chrome-border: #0d0d0f;--chrome-ink: #d4d4d6;--chrome-ink-muted: #8a8a8f;--chrome-url-bg: #2a2a2e;--radius: 8px;color-scheme:dark}[data-theme=light]{--bg: #ffffff;--panel: #ffffff;--panel-2: #f5f5f7;--ink: #1a1a1a;--muted: #6b7280;--border: #e5e7eb;--accent: #2563eb;--accent-ink: #ffffff;--good: #16a34a;--bad: #dc2626;--shadow: 0 1px 2px rgba(0, 0, 0, .06);--chrome-bg: #f3f4f6;--chrome-bg-2: #e5e7eb;--chrome-border: #d1d5db;--chrome-ink: #374151;--chrome-ink-muted: #6b7280;--chrome-url-bg: #ffffff;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,sans-serif;font-size:15px;line-height:1.5;min-height:100vh;display:flex;flex-direction:column;transition:background-color .2s ease,color .2s ease}#root,.screen-wrap{flex:1;display:flex;flex-direction:column;min-height:0;width:100%}.screen{flex:1;display:flex;flex-direction:column;min-height:0}.screen[hidden]{display:none!important}.theme-toggle{position:fixed;top:16px;right:16px;width:36px;height:36px;padding:0;border-radius:50%;border:1px solid var(--border);background:var(--panel);color:var(--ink);display:grid;place-items:center;cursor:pointer;z-index:1000;transition:background .15s,border-color .15s,color .15s}.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}.theme-toggle .icon-sun{display:none}.theme-toggle .icon-moon,[data-theme=light] .theme-toggle .icon-sun{display:block}[data-theme=light] .theme-toggle .icon-moon{display:none}#intro{align-items:center;justify-content:flex-start;padding:64px 24px 48px;overflow-y:auto}.intro-inner{width:100%;max-width:520px;display:flex;flex-direction:column;gap:40px}.intro-card{text-align:center;padding:16px 8px 8px}.intro-card h1{font-size:40px;margin:0 0 12px;color:var(--ink);font-weight:700;letter-spacing:-.02em}.intro-card p{color:var(--muted);margin:0 0 28px;font-size:15px}.history-wrap[hidden]{display:none!important}.history-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}.history-title{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:600;margin:0}.link-btn{background:transparent;border:none;color:var(--muted);font-size:12px;padding:2px 4px;cursor:pointer;border-radius:4px}.link-btn:hover{color:var(--accent);border-color:transparent}.history-list{list-style:none;padding:0;margin:0;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);overflow:hidden}.history-item{display:grid;grid-template-columns:16px minmax(0,1fr) auto;align-items:center;gap:12px;padding:11px 14px;border-bottom:1px solid var(--border);font-size:13px}.history-item:last-child{border-bottom:none}.history-result{width:8px;height:8px;border-radius:50%;display:inline-block;justify-self:center}.history-result.won{background:var(--good)}.history-result.lost{background:var(--muted);opacity:.55}.history-pair{color:var(--ink);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-pair .arrow{color:var(--muted);margin:0 6px;font-weight:400}.history-stats{color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px;white-space:nowrap}.history-stats .vs-opt{opacity:.7;margin-left:8px}button{font:inherit;cursor:pointer;border-radius:6px;padding:9px 14px;border:1px solid var(--border);background:var(--panel);color:var(--ink);transition:background .15s,border-color .15s,color .15s}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.4;cursor:not-allowed}button[hidden]{display:none!important}button.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:500;padding:11px 20px}button.primary:hover{filter:brightness(1.08);color:var(--accent-ink);border-color:var(--accent)}button.ghost{background:transparent}button.small{padding:5px 10px;font-size:13px}#game{display:flex;flex-direction:column}.hud{display:flex;align-items:center;justify-content:space-between;padding:14px 72px 14px 24px;background:var(--panel);border-bottom:1px solid var(--border);gap:16px;flex-wrap:wrap}.hud-pair{display:flex;align-items:center;gap:14px;min-width:0}.hud-block{display:flex;flex-direction:column;min-width:0}.hud-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.hud-value{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:280px}.hud-value.target{color:var(--accent)}.hud-arrow{color:var(--muted);font-size:16px}.hud-meta{display:flex;align-items:center;gap:18px}.hud-stat{display:flex;flex-direction:column;align-items:center;min-width:44px}.hud-stat span:first-child{font-size:17px;font-weight:600;font-variant-numeric:tabular-nums}.hud-stat-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-top:1px}.browser{position:relative;flex:1;display:flex;flex-direction:column;background:#fff;margin:0 24px 24px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);min-height:0}.browser-chrome{display:flex;align-items:center;gap:4px;padding:8px 12px;background:var(--chrome-bg);border-bottom:1px solid var(--chrome-border);color:var(--chrome-ink)}.chrome-nav{background:transparent;border:none;width:32px;height:32px;border-radius:50%;padding:0;display:grid;place-items:center;color:var(--chrome-ink);transition:background .15s,color .15s}.chrome-nav svg{width:18px;height:18px;display:block}.chrome-nav:hover:not(:disabled){background:var(--chrome-bg-2);border-color:transparent;color:var(--ink)}.chrome-nav:disabled{opacity:.35;cursor:default}.chrome-nav.spinning svg{animation:chrome-spin .8s linear infinite}@keyframes chrome-spin{to{transform:rotate(360deg)}}.chrome-url{flex:1;display:flex;align-items:center;gap:8px;margin-left:6px;height:32px;padding:0 12px;background:var(--chrome-url-bg);border-radius:16px;color:var(--chrome-ink);font-size:13px;min-width:0}.chrome-lock{width:13px;height:13px;flex:0 0 13px;color:var(--chrome-ink-muted)}#chrome-url-text{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}iframe#article-frame{flex:1;border:0;width:100%;background:#fff;min-height:0}.game-loading{position:absolute;top:0;right:0;bottom:0;left:0;z-index:30;background:var(--panel);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;opacity:1;transition:opacity .35s ease}.game-loading[hidden]{display:none!important}.game-loading.fading-out{opacity:0;pointer-events:none}.loader-graphic{display:block;overflow:visible}.loader-line{stroke:var(--border);stroke-width:2;stroke-linecap:round;fill:none}.loader-dash{stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-dasharray:4 10;fill:none;animation:loader-dash-flow 1.4s linear infinite;opacity:.55}.loader-node{fill:var(--accent);transform-origin:center;transform-box:fill-box;animation:loader-node-pulse 1.6s ease-in-out infinite}.loader-node.end{animation-delay:.8s}.loader-traveler{fill:var(--accent);filter:drop-shadow(0 0 8px var(--accent))}@keyframes loader-dash-flow{to{stroke-dashoffset:-28}}@keyframes loader-node-pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(.72);opacity:.5}}.loader-pair{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:600;color:var(--ink);max-width:80%;text-align:center}.loader-pair[hidden]{display:none}.loader-pair .arrow{color:var(--muted);font-weight:400}.loader-status{color:var(--muted);font-size:13px;letter-spacing:.02em}#end{align-items:center;justify-content:center;padding:32px 16px;overflow-y:auto}.end-card{width:100%;max-width:820px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:32px}.end-card h2{margin:0 0 6px;font-size:24px;font-weight:600;letter-spacing:-.01em}.muted{color:var(--muted)}.small{font-size:13px}.paths{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:28px 0}.path-col h3{margin:0 0 14px;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:600;display:flex;align-items:center;gap:10px}.badge{background:var(--panel-2);border:1px solid var(--border);color:var(--ink);padding:2px 8px;border-radius:99px;font-size:11px;letter-spacing:0;font-weight:600;text-transform:none}.badge.accent{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.path-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column}.path-list li{position:relative;display:flex;align-items:center;gap:10px;padding:7px 0;opacity:0;transform:translateY(4px);animation:pop .25s ease forwards}.path-list li .step{flex:0 0 22px;height:22px;border-radius:50%;background:var(--panel-2);border:1px solid var(--border);display:grid;place-items:center;font-size:11px;color:var(--muted)}.path-list li:first-child .step,.path-list li:last-child .step{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.path-list li a{color:var(--ink);text-decoration:none;font-size:14px;border-bottom:1px solid transparent}.path-list li a:hover{color:var(--accent);border-color:var(--accent)}.path-list li+li:before{content:"";position:absolute;left:10px;top:-7px;width:1px;height:14px;background:var(--border)}@keyframes pop{to{opacity:1;transform:translateY(0)}}.end-actions{display:flex;justify-content:center;gap:12px;margin-top:4px}.modal.modal-end .end-backdrop{background:#0000009e;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}[data-theme=light] .modal.modal-end .end-backdrop{background:#0f172a59}.modal-card.end-card-modal{max-width:820px;padding:32px 36px 28px}.end-headline{margin:0 0 6px;font-size:24px;font-weight:600;letter-spacing:-.01em}.end-sub{margin:0 0 4px}.optimal-status{padding:12px 0;font-style:italic}.modal[hidden]{display:none!important}.modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;display:grid;place-items:center;padding:24px}.modal-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#0000008c;cursor:pointer;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}[data-theme=light] .modal-backdrop{background:#0f172a47}.modal-card{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:28px 30px 24px;width:100%;max-width:480px;max-height:calc(100vh - 48px);overflow-y:auto;box-shadow:0 1px 2px #0003,0 8px 32px #0000004d}[data-theme=light] .modal-card{box-shadow:0 1px 2px #0000000a,0 12px 40px #0f172a1f}.modal-title{margin:0 0 18px;font-size:18px;font-weight:600}.modal-section+.modal-section{margin-top:16px}.modal-label-row{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}.modal-label{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:600;margin:0}.modal-cats{display:grid;grid-template-columns:1fr 1fr;gap:6px 14px}.modal-cats label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink);cursor:pointer;padding:2px 0}.modal-cats input[type=checkbox]{width:14px;height:14px;accent-color:var(--accent);margin:0;flex:0 0 14px}.modal-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.modal-field{display:flex;flex-direction:column;gap:6px;min-width:0}.modal-field>label{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-weight:600}.modal-field select{background:var(--panel-2);border:1px solid var(--border);border-radius:6px;padding:8px 10px;color:var(--ink);font:inherit;font-size:13px;cursor:pointer}.modal-field select:focus{outline:2px solid var(--accent);outline-offset:-1px}.modal-field.modal-toggle{justify-content:flex-end}.modal-field.modal-toggle label{display:flex;flex-direction:row;align-items:center;gap:8px;font-size:13px;color:var(--ink);font-weight:400;text-transform:none;letter-spacing:0;cursor:pointer}.modal-field.modal-toggle input{width:16px;height:16px;accent-color:var(--accent)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.modal-step-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:22px}.step-back{flex:0 0 32px;width:32px;height:32px;padding:0;border-radius:50%;border:1px solid var(--border);background:var(--panel);color:var(--ink);display:grid;place-items:center;cursor:pointer;transition:background .15s,border-color .15s,color .15s}.step-back:hover{border-color:var(--accent);color:var(--accent)}.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:4px;background:var(--panel-2);border:1px solid var(--border);border-radius:10px;position:relative}.seg-btn{position:relative;background:transparent;border:none;color:var(--muted);padding:8px 10px 9px;border-radius:7px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;transition:color .18s;z-index:1}.seg-btn:hover:not(.active){color:var(--ink);border-color:transparent}.seg-btn.active{color:var(--accent-ink)}.seg-pill{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--accent);border-radius:7px;z-index:-1;box-shadow:0 1px 2px #00000026}.seg-label{font-size:13px;font-weight:600;letter-spacing:0;text-transform:none}.seg-hint{font-size:10.5px;opacity:.75;font-weight:500;letter-spacing:0;text-transform:none}.row-toggle{display:flex;align-items:center;gap:10px;padding:11px 14px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;cursor:pointer;font-size:13px;color:var(--ink);transition:border-color .15s}.row-toggle:hover{border-color:var(--accent)}.row-toggle input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent);margin:0}.challenge-item,.challenge-item:hover{background:var(--panel-2)}.intro-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.challenge-list{display:flex;flex-direction:column;gap:10px;margin-top:8px}.challenge-item{text-align:left;display:flex;flex-direction:column;gap:6px;padding:14px 16px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:border-color .15s,background .15s}.challenge-item:hover{border-color:var(--accent)}.challenge-item-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.challenge-name{font-weight:600;font-size:15px;color:var(--ink)}.challenge-meta{font-size:11px;color:var(--muted);white-space:nowrap}.challenge-desc{color:var(--muted);font-size:13px;line-height:1.4}.stage-chain{display:flex;align-items:center;gap:6px;flex-wrap:wrap;min-width:0}.stage-pill{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:99px;font-size:12px;font-weight:500;border:1px solid var(--border);background:var(--panel-2);color:var(--muted);max-width:200px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.stage-pill.done{background:transparent;color:var(--muted);border-color:var(--border);opacity:.65}.stage-pill.done .pill-num{background:transparent;border:1px solid var(--border);color:var(--muted)}.stage-pill.here{background:var(--panel);color:var(--ink);border-color:var(--accent)}.stage-pill.here .pill-num{background:var(--accent);color:var(--accent-ink)}.stage-pill.current{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.stage-pill.locked{background:var(--panel-2);color:var(--muted);border-style:dashed}.stage-pill .pill-num{width:16px;height:16px;border-radius:50%;background:#ffffff2e;display:inline-grid;place-items:center;font-size:10px;font-weight:700}.stage-pill.current .pill-num{background:#ffffff47}.stage-pill.done .pill-num{background:transparent;border:1px solid var(--border)}.stage-pill.locked .pill-num{background:transparent}.stage-sep{color:var(--muted);font-size:11px}.hud-stack{display:flex;flex-direction:column;background:var(--panel);border-bottom:1px solid var(--border)}.hud-stack .hud{background:transparent;border-bottom:none;padding-right:72px}.hud-row{display:flex;align-items:center;gap:10px;padding:8px 24px 10px;border-top:1px solid var(--border);font-size:13px;flex-wrap:wrap}.row-label{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:600}.row-text{flex:1;color:var(--ink);line-height:1.4}.mystery-row .row-text{font-style:italic}.hot-potato-row{gap:12px}.hp-pill{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:99px;font-size:12px;font-weight:500;border:1px solid var(--border)}.hp-pill .hp-tag{font-size:9px;letter-spacing:.1em;text-transform:uppercase;opacity:.7;font-weight:600}.hp-anchor{background:#4ade801a;border-color:var(--good);color:var(--ink)}.hp-anchor.visited{background:var(--good);color:#0b0f17;border-color:var(--good)}.hp-anchor .hp-tick{font-weight:700}.hp-taboo{background:#ef444414;border-color:var(--bad);color:var(--ink)}.hub-badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:99px;background:#ef44441f;border:1px solid var(--bad);color:var(--bad);font-size:11px;font-weight:600}.hud-stat-optimal span:first-child{color:var(--accent)}.hud-hint{padding:8px 24px;background:#6ea8ff1f;color:var(--ink);font-size:13px;border-top:1px solid var(--border);text-align:center}[data-theme=light] .hud-hint{background:#2563eb14}.browser-body{flex:1;display:flex;min-height:0}.browser-pane{flex:1;position:relative;display:flex;min-height:0}.browser-pane iframe{flex:1;border:0;width:100%;background:#fff;min-height:0}.browser-split .browser-body{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border)}.browser-pane-side{flex-direction:column;background:#fff}.browser-pane-side iframe{pointer-events:none;filter:saturate(.85)}.side-label{padding:6px 12px;background:var(--panel);color:var(--muted);font-size:11px;font-weight:600;letter-spacing:.05em;border-bottom:1px solid var(--border);text-transform:uppercase;flex-shrink:0}@media (max-width: 800px){.browser-split .browser-body{grid-template-columns:1fr}.browser-pane-side{display:none}}@media (max-width: 700px){.paths{grid-template-columns:1fr}.hud-value{max-width:140px}.browser{margin:0 12px 12px}.modal-cats,.modal-row{grid-template-columns:1fr}.stage-pill{max-width:110px;font-size:11px}}