:root{--bg: #f3f1ea;--panel: #fbfaf6;--ink: #15171c;--muted: #6b7080;--rule: rgba(21, 23, 28, .12);--rule-strong: rgba(21, 23, 28, .22);--accent: #15171c;--ok: #12a594;--bad: #e5484d;--conflict: #f5a524;--font: "Space Grotesk", system-ui, sans-serif;--mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;cursor:pointer}code{font-family:var(--mono);font-size:.86em;background:#15171c0f;padding:1px 5px;border-radius:4px}[hidden]{display:none!important}.top{display:flex;align-items:center;gap:24px;padding:14px 28px;border-bottom:1px solid var(--rule);background:var(--panel);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em}.brand svg{width:28px;height:28px}.brand line{stroke:var(--rule-strong);stroke-width:1.6}.tabs{display:flex;gap:4px;background:#15171c0d;padding:3px;border-radius:999px}.tabs button{border:0;background:none;padding:5px 14px;border-radius:999px;font-weight:500;color:var(--muted)}.tabs button[aria-selected=true]{background:#fff;color:var(--ink);box-shadow:0 1px 3px #15171c1f}.src{margin-left:auto;color:var(--muted);text-decoration:none;font-weight:500}.src:hover{color:var(--ink)}.intro{padding:36px 28px 22px;max-width:1500px;margin:0 auto}.intro h1{font-size:clamp(26px,3.4vw,42px);line-height:1.1;letter-spacing:-.025em;font-weight:700;max-width:22ch}.intro p{margin-top:12px;color:var(--muted);max-width:70ch;font-size:16px}.lab,.live{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px;padding:0 28px 28px;max-width:1500px;margin:0 auto;align-items:start}.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:8px;background:var(--panel);border:1px solid var(--rule);border-radius:var(--radius);margin-bottom:14px;position:sticky;top:66px;z-index:5}.group{display:flex;gap:3px;align-items:center}.group+.group{padding-left:10px;border-left:1px solid var(--rule)}.actions{margin-left:auto}#tools button{width:36px;height:36px;border:0;border-radius:8px;background:none;display:grid;place-items:center}#tools button:hover{background:#15171c0f}#tools button.on{background:var(--ink);color:#fff}#tools svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.swatch{width:24px;height:24px;border-radius:50%;border:2px solid var(--panel);box-shadow:0 0 0 1px var(--rule-strong);margin:0 2px}.swatch.on{box-shadow:0 0 0 2px var(--ink)}button.text{border:1px solid var(--rule-strong);background:#fff;padding:6px 12px;border-radius:8px;font-weight:500;font-size:13.5px;white-space:nowrap}button.text:hover{border-color:var(--ink)}button.text.accent{background:var(--ink);color:#fff;border-color:var(--ink)}button.text[aria-pressed=true]{background:var(--conflict);border-color:#c98200;color:var(--ink)}button.text:disabled{opacity:.4;cursor:default}.peers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.peer-card{background:var(--panel);border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden;transition:box-shadow .15s}.peer-card.active{box-shadow:0 0 0 2px var(--peer, var(--ink))}.peer-head{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--rule);font-size:14px;min-height:42px}.dot{width:10px;height:10px;border-radius:50%;background:var(--peer, var(--muted));flex:none}.vv{font-family:var(--mono);font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.hash{font-family:var(--mono);font-size:11px;padding:2px 6px;border-radius:5px;margin-left:auto;flex:none;color:#fff}.close{border:0;background:none;color:var(--muted);font-size:18px;line-height:1;padding:0 2px;flex:none}.close:hover{color:var(--bad)}.board-wrap{position:relative;touch-action:none}canvas.board{display:block;width:100%}.sticky-editor{position:absolute;display:none;border:0;outline:none;resize:none;background:transparent;font-family:var(--font);color:var(--ink);overflow:hidden}.side{display:flex;flex-direction:column;gap:14px;position:sticky;top:66px}.panel{background:var(--panel);border:1px solid var(--rule);border-radius:var(--radius);padding:14px}.panel-head{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:2px 10px;margin-bottom:8px}.panel h3{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}.hint{font-size:12px;color:var(--muted)}.status .verdict{font-size:22px;font-weight:700;letter-spacing:-.01em;display:flex;align-items:center;gap:8px}.status .verdict:before{content:"";width:12px;height:12px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px #12a5942e}.status.diverged .verdict:before{background:var(--conflict);box-shadow:0 0 0 4px #f5a52438;animation:pulse 1s infinite}@keyframes pulse{50%{box-shadow:0 0 0 7px #f5a52414}}.hashes{display:flex;flex-wrap:wrap;gap:5px;margin:10px 0 12px}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.stats div{background:#15171c0a;border-radius:8px;padding:6px 8px}.stats dt{font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}.stats dd{font-family:var(--mono);font-size:15px;font-weight:600}.topology{display:block;width:100%;max-width:300px;aspect-ratio:1;margin:0 auto 6px;cursor:crosshair;touch-action:none}.row,.presets{display:flex;gap:6px;flex-wrap:wrap}.presets{margin-bottom:10px}.slider{display:grid;grid-template-columns:92px 1fr 62px;align-items:center;gap:8px;font-size:13px;margin-top:4px}.slider input{accent-color:var(--ink);width:100%}.slider output{font-family:var(--mono);font-size:12px;text-align:right;color:var(--muted)}.log{list-style:none;font-family:var(--mono);font-size:11.5px;max-height:230px;overflow-y:auto;display:flex;flex-direction:column;gap:1px}.log li{display:flex;gap:8px;padding:2px 4px;border-radius:4px;white-space:nowrap}.log li .who{font-weight:600;width:3.2ch;flex:none}.log li .what{overflow:hidden;text-overflow:ellipsis}.log li.conflict{background:#f5a52429}.peer-card.solo .board-wrap{min-height:200px}.note{font-size:13.5px;color:var(--muted);margin-bottom:10px}.steps{display:flex;flex-direction:column;gap:14px;margin-bottom:10px}.step{display:flex;flex-direction:column;gap:6px;align-items:flex-start}.step+.step{padding-top:14px;border-top:1px solid var(--rule)}.step h4{font-size:13px;font-weight:600}.step textarea{width:100%;height:64px;font-family:var(--mono);font-size:10.5px;border:1px solid var(--rule-strong);border-radius:8px;padding:6px 8px;resize:vertical;background:#fff;word-break:break-all}#rtc-status.ok{color:var(--ok);font-weight:600}.explain{max-width:1500px;margin:0 auto;padding:24px 28px 40px}.explain h2{font-size:26px;letter-spacing:-.02em;margin-bottom:16px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.cards article{background:var(--panel);border:1px solid var(--rule);border-radius:var(--radius);padding:18px}.cards .n{font-family:var(--mono);font-size:12px;color:var(--muted)}.cards h3{font-size:17px;margin:4px 0 6px;letter-spacing:-.01em}.cards p{color:#3d424f;font-size:14.5px}.cards .tag{display:inline-block;margin-top:10px;font-family:var(--mono);font-size:11px;color:var(--muted);background:#15171c0d;padding:2px 7px;border-radius:5px}.foot{text-align:center;color:var(--muted);font-size:13px;padding:0 16px 36px}@media(max-width:1100px){.lab,.live{grid-template-columns:minmax(0,1fr)}.side{position:static;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.top{padding:10px 16px;gap:12px}.intro,.lab,.live,.explain{padding-left:16px;padding-right:16px}.peers,.cards{grid-template-columns:minmax(0,1fr)}.toolbar{top:56px}.actions{margin-left:0;padding-left:0!important;border-left:0!important;flex-wrap:wrap}}