/* A shared scale, separate readable controls; all colours follow the existing lab theme. */
.arch-lab .arch-river{--arch-river-red:#c63946;--arch-river-blue:#2362cc;--arch-river-dog:#9b681e;gap:20px}
:root[data-design="v2"][data-theme="dark"] .arch-lab .arch-river{--arch-river-red:#ff8d9a;--arch-river-blue:#8fbcff;--arch-river-dog:#edbd77}
@media(prefers-color-scheme:dark){:root[data-design="v2"]:not([data-theme="light"]) .arch-lab .arch-river{--arch-river-red:#ff8d9a;--arch-river-blue:#8fbcff;--arch-river-dog:#edbd77}}
.arch-lab .arch-river-scale{border-left:3px solid var(--arch-field-line);padding-left:12px;line-height:1.6}
.arch-lab .arch-river-throw{display:grid;gap:10px;padding:16px;border:1px solid var(--arch-soft-line);border-radius:16px;background:var(--arch-surface)}
.arch-lab .arch-river-throw .arch-row{flex-wrap:nowrap}
.arch-lab .arch-river-throw input[type=number]{flex:0 0 72px;width:72px}
.arch-lab .arch-river-throw input[type=range]{flex:1 1 120px;width:100px}
.arch-lab .arch-river-readouts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.arch-lab .arch-river-readouts>div{display:grid;gap:7px;padding:15px 18px;border:1px solid var(--arch-soft-line);border-radius:16px;background:var(--arch-surface);min-width:0}
.arch-lab .arch-river-readouts span{font-size:14px;color:var(--arch-muted)}
.arch-lab .arch-river-readouts output,.arch-lab .arch-river-readouts strong{font:700 clamp(24px,4vw,34px)/1.15 system-ui,sans-serif;color:var(--arch-ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.arch-lab .arch-river-phase{display:flex;align-items:flex-start;gap:12px;border-left:4px solid var(--arch-primary-bg);padding:14px 16px;background:var(--arch-surface);border-radius:0 14px 14px 0;color:var(--arch-ink)}
.arch-lab .arch-river-phase strong{font-size:19px;line-height:1.35}
.arch-lab .arch-river-phase p{margin:6px 0 0;font-size:15px;line-height:1.55;color:var(--arch-muted)}
.arch-lab .arch-river-phase-number{flex:0 0 28px;width:28px;height:28px;display:grid;place-items:center;background:var(--arch-pressed-bg);border:1px solid var(--arch-soft-line);border-radius:50%;font-weight:700;color:var(--arch-label)}
.arch-lab .arch-river-scene{padding:16px 12px;border:1px solid var(--arch-soft-line);border-radius:18px;background:var(--arch-surface);overflow:hidden;min-width:0}
.arch-lab .arch-river-scene svg{display:block;width:100%;height:auto;max-width:680px;margin:6px auto 12px;overflow:visible}
.arch-lab .arch-river-scene-top{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:14px;font-weight:600;color:var(--arch-label)}
.arch-lab .arch-river-legend{display:flex;flex-wrap:wrap;gap:10px 18px;margin:12px 0}
.arch-lab .arch-river-key{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--arch-ink)}
.arch-lab .arch-river-key i{display:inline-block;flex:0 0 12px;width:12px;height:12px;border:1px solid var(--arch-surface);box-shadow:0 0 0 1px currentColor;border-radius:50%}
.arch-lab .arch-river-key-red i{background:var(--arch-river-red);color:var(--arch-river-red)}
.arch-lab .arch-river-key-blue i{background:var(--arch-river-blue);color:var(--arch-river-blue)}
.arch-lab .arch-river-key-dog i{border-radius:4px;background:var(--arch-river-dog);color:var(--arch-river-dog)}
.arch-lab .arch-river-playback{display:grid;gap:10px}
.arch-lab .arch-river-playback .arch-row{gap:10px;margin-bottom:4px}
.arch-lab .arch-river-playback input[type=range]{width:100%;margin:0}
.arch-lab .arch-river-playback .arch-play{flex:1 1 150px;min-width:140px}
.arch-lab .arch-river-range-ends{display:flex;gap:12px;justify-content:space-between;color:var(--arch-muted);font-size:13px;margin-top:-6px}
.arch-lab .arch-river-quiet{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:400;min-height:44px}
.arch-lab .arch-river-quiet input{flex:0 0 20px;width:20px;height:20px;accent-color:var(--arch-primary-bg)}
.arch-lab .arch-river-events{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.arch-lab .arch-river-event{display:flex;gap:8px;text-align:left;align-items:flex-start;padding:12px 10px;border-radius:12px;line-height:1.3;min-width:0}
.arch-lab .arch-river-event>span+span{display:grid;gap:5px;min-width:0}
.arch-lab .arch-river-event strong{font-size:18px;font-variant-numeric:tabular-nums}
.arch-lab .arch-river-event>span+span>span{font-size:13px}
.arch-lab .arch-river-event-step{flex:0 0 22px;display:grid;place-items:center;height:22px;border:1px solid var(--arch-soft-line);border-radius:50%;font-size:13px}
.arch-lab .arch-river-event[data-reached=true]{border-color:var(--arch-primary-bg)}
.arch-lab .arch-river-event[aria-current=step]{background:var(--arch-pressed-bg);box-shadow:inset 0 -3px var(--arch-primary-bg)}
.arch-lab .arch-river-event[aria-pressed=true]{outline:2px solid var(--arch-primary-bg);outline-offset:-2px}
.arch-lab .arch-river-comparison{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.arch-lab .arch-river-comparison>div{display:grid;gap:6px;padding:15px;border:1px solid var(--arch-soft-line);border-radius:16px;background:var(--arch-surface)}
.arch-lab .arch-river-comparison strong{font-size:26px;color:var(--arch-ink);font-variant-numeric:tabular-nums}
.arch-lab .arch-river-comparison>div>span:not(.arch-river-key){font-size:13px;color:var(--arch-muted)}
.arch-lab .arch-river-verdict{padding:16px;border-radius:14px}
.arch-lab .arch-river-verdict>strong{display:block;line-height:1.5}
.arch-lab .arch-river-verdict p{font-size:15px;margin-top:8px}
.arch-lab .arch-river-graph{border-top:1px solid var(--arch-soft-line);padding-top:16px}
.arch-lab .arch-river-graph summary{cursor:pointer;color:var(--arch-label);font-weight:600;min-height:44px;line-height:1.5}
.arch-lab .arch-river-graph summary:focus-visible{outline:3px solid var(--arch-focus);outline-offset:3px;border-radius:4px}
.arch-lab .arch-river-graph svg{display:block;width:100%;height:auto;background:var(--arch-surface);border:1px solid var(--arch-soft-line);border-radius:14px;padding:8px;margin-top:14px;box-sizing:border-box}
@media(max-width:760px){.arch-lab .arch-river-events{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:400px){.arch-lab .arch-river-readouts>div{padding:12px}.arch-lab .arch-river-throw{padding:12px}.arch-lab .arch-river-scene{padding:12px 6px}.arch-lab .arch-river-scene-top{padding:0 6px;font-size:12px}.arch-lab .arch-river-phase{padding:12px 10px;gap:8px}.arch-lab .arch-river-phase strong{font-size:17px}.arch-lab .arch-river-comparison{gap:8px}.arch-lab .arch-river-comparison>div{padding:12px 10px}.arch-lab .arch-river-legend{gap:10px 13px}.arch-lab .arch-river-legend .arch-river-key{font-size:13px}}