/* V2.7 — a spacious instrument for exploring real knowledge. */
#brain-view{padding:12px clamp(14px,3vw,40px) 24px;overscroll-behavior:contain}
.brain-heading,.brain-toolbar,.brain-layout,.brain-help,.brain-legend{max-width:1440px}
.brain-heading{margin-bottom:18px;align-items:center}.brain-heading h1{font-size:clamp(28px,3vw,38px);font-weight:500;letter-spacing:-.055em;margin:5px 0 0}.brain-heading h1 span{background:linear-gradient(110deg,#bef2ff,#b7b9fb);background-clip:text;color:transparent}.brain-kicker{font-size:12px;letter-spacing:.18em}.sample-chip{font-size:12px;white-space:nowrap}
.brain-toolbar{margin-bottom:12px}.brain-toolbar input{background:linear-gradient(120deg,#e2f7ff0c,#bcb0ff08);border-radius:20px;padding:14px 18px;backdrop-filter:blur(18px);transition:border-color .25s,box-shadow .25s}.brain-toolbar input:focus{box-shadow:0 0 0 4px #b2eaff0b;border-color:#b2eaff80}.brain-toolbar button{min-height:48px;border-radius:18px}
.brain-legend{display:flex;gap:8px;margin:0 auto 16px;flex-wrap:wrap}.brain-legend button{display:flex;align-items:center;gap:8px;min-height:38px;padding:8px 13px;border:1px solid transparent;border-radius:20px;background:transparent;color:var(--muted);font-size:14px;transition:background .2s,border-color .2s,transform .2s}.brain-legend button:before{content:'';height:6px;width:6px;border-radius:50%;background:var(--node-color);box-shadow:0 0 12px var(--node-color)}.brain-legend button[aria-pressed=true]{background:#c5e9ff12;border-color:var(--line);color:var(--text)}
.brain-layout{grid-template-columns:minmax(0,1fr) 310px;gap:16px;align-items:start}.brain-canvas{height:clamp(440px,65dvh,820px);min-height:440px;border-radius:32px;background:radial-gradient(ellipse at 40% 40%,#172c4430,transparent 70%),linear-gradient(150deg,#101a2abb,#080e1ada);border:1px solid #c6e5ff24;box-shadow:inset 0 1px 0 #e0f5ff18,0 24px 80px #00000024;isolation:isolate}.brain-volume{width:100%;height:100%;outline-offset:-5px}.brain-motion-controls{position:absolute;top:16px;left:16px;right:16px;display:flex;gap:6px;pointer-events:none}.brain-motion-controls button,.brain-zoom button{position:relative;pointer-events:auto;border:1px solid #c6e4ff26;background:#18243795;backdrop-filter:blur(24px) saturate(1.3);-webkit-backdrop-filter:blur(24px) saturate(1.3);border-radius:16px;min-height:42px;padding:9px 13px;color:var(--text);font-size:14px;box-shadow:inset 0 1px 0 #ffffff0c;transition:transform .2s,background .2s,border-color .2s}.brain-motion-controls button:last-child{margin-left:auto}.brain-motion-controls button[aria-pressed=true]{border-color:#c6e4ff66;background:#bce6ff18}.brain-zoom{bottom:18px;left:18px;gap:6px;backdrop-filter:none}.brain-count{bottom:32px;right:18px;font-size:12px;letter-spacing:.015em}.brain-detail{height:clamp(440px,65dvh,820px);max-height:none;border-radius:28px;padding:24px;background:linear-gradient(140deg,#c8eaff12,#b7c9ed05);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);scrollbar-width:thin;scrollbar-color:#b0d6ef40 transparent}.brain-detail h2{font-size:24px;font-weight:500;line-height:1.2;overflow-wrap:anywhere}.brain-detail p{font-size:14px;line-height:1.65}.brain-detail .brain-related{font-size:14px;line-height:1.5;padding:13px 8px;border-radius:10px;transition:background .2s,transform .2s}.brain-detail .brain-filter{padding:13px 12px;border-radius:16px;transition:background .2s,border-color .2s,transform .2s}.brain-back{border:0;background:transparent;color:var(--accent);font-size:14px;padding:0 0 20px;min-height:44px}.brain-provenance{grid-column:1/-1;margin:0 4px;color:var(--muted);font-size:12px;line-height:1.6}.brain-help{font-size:12px;line-height:1.7;margin-top:8px}.brain-tooltip{position:absolute;z-index:3;max-width:min(260px,80%);transform:translate(-50%,-100%);padding:9px 14px;pointer-events:none;border:1px solid #d0ecff30;background:#172234e8;border-radius:14px;color:#e2f2ff;font-size:14px;box-shadow:0 10px 30px #0004;backdrop-filter:blur(16px)}.brain-empty{position:absolute;inset:42% 24px auto;text-align:center;color:var(--muted);font-size:16px;pointer-events:none}.brain-detail-arrive{animation:brain-detail-arrive .4s cubic-bezier(.2,.7,.2,1) both}
@keyframes brain-detail-arrive{from{opacity:.4;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
body.light .brain-heading h1 span{background-image:linear-gradient(110deg,#347e9b,#65529b)}body.light .brain-canvas{background:radial-gradient(ellipse at 40% 45%,#bfdeed60,transparent 70%),linear-gradient(145deg,#f8fcffba,#d9e6f58a);border-color:#fff;box-shadow:inset 0 1px 0 #fff,0 20px 65px #355d8c0f}body.light .brain-motion-controls button,body.light .brain-zoom button{background:#ffffff9c;border-color:#fff;box-shadow:0 4px 12px #42648208}body.light .brain-motion-controls button[aria-pressed=true]{background:#d7eaf5d0;border-color:#b9d4e7}body.light .brain-detail{background:linear-gradient(140deg,#ffffffbd,#eff7fc66);border-color:#fff}body.light .brain-tooltip{color:#183747;background:#f5fbfff0;border-color:#fff}body.light .brain-toolbar input{background:#ffffff75}body.light .brain-legend button[aria-pressed=true]{background:#fff8}
@media(hover:hover){.brain-motion-controls button:hover,.brain-zoom button:hover{transform:translateY(-2px);border-color:#bce9ff8a;background:#9ad8ff22}.brain-legend button:hover,.brain-detail .brain-related:hover,.brain-detail .brain-filter:hover{transform:translateY(-1px);background:#b9e6ff12}}
#brain-view button:active{transform:scale(.96)}#brain-view button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media(max-width:1050px){.brain-layout{grid-template-columns:minmax(0,1fr) 270px}.brain-detail{padding:20px}}
@media(max-width:800px){#brain-view{padding:10px 14px 24px}.brain-layout{grid-template-columns:1fr;gap:12px}.brain-heading{margin-bottom:14px}.brain-heading h1{font-size:30px}.brain-canvas{height:clamp(380px,57dvh,610px);min-height:380px;border-radius:26px}.brain-detail{height:auto;max-height:420px;min-height:0;border-radius:24px}.brain-legend{gap:3px;margin-bottom:12px}.brain-legend button{font-size:14px;padding:8px 10px;min-height:40px}.brain-toolbar input{font-size:16px}.brain-count{right:14px;bottom:17px}.brain-zoom{bottom:39px;left:14px}.brain-motion-controls{top:12px;left:12px;right:12px;gap:5px}.brain-motion-controls button{font-size:13px;padding:9px 10px;min-height:44px}.brain-zoom button{min-height:44px;min-width:44px}.brain-provenance{order:3}.brain-help{margin-top:10px}.sample-chip{max-width:130px;white-space:normal;text-align:center}}
@media(prefers-reduced-motion:reduce){.brain-detail-arrive{animation:none}#brain-view *,#brain-view *:before{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* V2.9 open space: restrained foreground, depth without an enclosing globe. */
.brain-canvas{background:radial-gradient(ellipse at 24% 32%,#17374745,transparent 48%),radial-gradient(ellipse at 77% 69%,#30204c38,transparent 48%),#070b16;border-color:#b7d7ff19;box-shadow:inset 0 1px 0 #ffffff0a,0 24px 80px #0003}
.brain-motion-controls{flex-wrap:wrap}.brain-count{pointer-events:none}
@media(max-width:430px){.brain-motion-controls{gap:4px}.brain-motion-controls button{font-size:12px;padding:8px;min-height:44px}.brain-canvas{height:62dvh;min-height:430px}.brain-count{font-size:12px}}