.app-shell{max-width:1180px;margin:auto;padding:34px 28px 46px}
.intro{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:30px;align-items:end;margin:20px 0 24px}
.eyebrow{margin:0 0 8px;color:var(--teal);font-size:.72rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.intro h1{max-width:790px;margin:0;font-size:clamp(1.8rem,4vw,3rem);line-height:1.06;letter-spacing:-.04em}
.lede{max-width:740px;margin:15px 0 0;color:var(--muted);font-size:1rem}
.lede a{color:var(--blue);font-weight:800}
.formula{padding:16px 18px;border:1px solid #c8d9f1;border-radius:16px;background:#edf4ff;box-shadow:var(--shadow)}
.formula span,.formula small{display:block;color:var(--muted);font-size:.72rem;font-weight:750}
.formula strong{display:block;margin:6px 0;font-size:1rem;color:var(--blue);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

.card{padding:23px;border:1px solid var(--line);border-radius:20px;background:var(--card);box-shadow:var(--shadow);margin-bottom:20px}
.card-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}
.card h2{margin:0;font-size:1.2rem}
.card-heading p{margin:6px 0 0;color:var(--muted);font-size:.85rem}

.toolbar{position:sticky;top:10px;z-index:30;display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:12px 20px}
.control-step{color:var(--blue);font-size:.78rem;font-weight:900}
.mode-picker{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.preset-button{border:1px solid var(--line);border-radius:8px;padding:7px 11px;background:#fff;color:var(--ink);font:800 .76rem inherit;cursor:pointer}
.preset-button:hover{border-color:var(--blue)}
.preset-button.active{border-color:var(--blue);background:#eaf3ff;color:var(--blue)}

.dataset-picker{display:flex;gap:14px;flex-wrap:wrap;margin-top:12px}
.dataset-button{display:flex;flex-direction:column;align-items:center;gap:6px;width:150px;padding:12px;border:1px solid var(--line);border-radius:14px;background:#fff;cursor:pointer;text-align:center}
.dataset-button:hover{border-color:var(--blue)}
.dataset-button.active{border-color:var(--teal);background:#eff9f8;box-shadow:0 4px 10px rgba(20,138,136,.12)}
.dataset-preview{width:100%;height:auto;aspect-ratio:1;border-radius:8px;background:#f7f5ef;border:1px solid var(--line)}
.dataset-name{font-size:.82rem;font-weight:850;color:var(--ink)}
.dataset-blurb{font-size:.68rem;color:var(--muted);line-height:1.35}
.effective-step{display:flex;align-items:center;gap:7px;margin-left:auto;padding:6px 12px;border-radius:10px;background:#f3f6f7;font-size:.76rem;color:var(--muted);font-weight:800}
.effective-step strong{color:var(--red);font-size:.9rem;font-family:ui-monospace,SFMono-Regular,monospace}
.param-row{display:flex;align-items:center;gap:9px}
.param-row label{color:var(--muted);font-size:.78rem;font-weight:800}
.param-row input[type=range]{width:140px}
.param-value{min-width:34px;color:var(--ink);font-size:.8rem;font-weight:850;font-family:ui-monospace,SFMono-Regular,monospace}

.controls-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:14px 20px}
.status-text{color:var(--muted);font-size:.78rem;font-weight:800;font-family:ui-monospace,SFMono-Regular,monospace}
.controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.controls button{border:0;border-radius:10px;padding:9px 13px;background:var(--blue);color:#fff;cursor:pointer;font-size:.8rem;font-weight:850}
.controls button.secondary{background:#edf1f3;color:var(--ink)}
.controls button:disabled{opacity:.46;cursor:default}
#speed-toggle{min-width:38px;font-family:ui-monospace,SFMono-Regular,monospace}
.epoch-run-group{display:flex;align-items:center;gap:6px;padding:3px;border-radius:10px;background:#edf1f3}
.epoch-run-group label{padding-left:8px;color:var(--muted);font-size:.78rem;font-weight:800}
.epoch-run-group input{width:44px;border:1px solid var(--line);border-radius:7px;padding:6px 5px;text-align:center;font:800 .78rem inherit}
.epoch-run-group button{background:transparent;color:var(--ink);padding:7px 10px}

.race-row{display:flex;gap:20px;align-items:flex-start;margin-top:10px}
.race-chart-wrap{flex:1.5;min-width:0}
.race-table-wrap{flex:1;min-width:280px;padding-left:20px;border-left:1px solid var(--line)}
.race-chart{display:block;width:100%;height:auto}
.plot-grid{stroke:#e2e8ea;stroke-width:1}
.axis-label{fill:#64747e;font-size:12px;font-weight:800}
.axis-label.race-y{font-size:10.5px}
.axis-label.race-lda-label{font-size:10.5px;fill:#17212b;font-weight:900}
.err-lda-line{stroke:#17212b;stroke-width:1.6;stroke-dasharray:7 5;opacity:.85}
.race-line{fill:none;stroke-width:2.6;stroke-linejoin:round;stroke-linecap:round}
.race-line-off{stroke:#d3d8da;stroke-width:1.6}
.race-dot{stroke:#fff;stroke-width:2}
.race-dot-off{fill:#d3d8da;stroke:#fff;stroke-width:1.5;opacity:.7}

.activation-legend{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:14px}
.legend-toggle{display:flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;padding:6px 12px 6px 8px;background:#fff;color:var(--muted);font:800 .78rem inherit;cursor:pointer;opacity:.45;transition:opacity .15s,border-color .15s}
.legend-toggle.on{opacity:1;border-color:var(--sw);color:var(--ink)}
.legend-swatch{width:11px;height:11px;border-radius:50%;background:var(--sw);display:inline-block;flex:none}

.shape-slope-strip{display:flex;gap:16px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.mini-av-chart{flex:1;min-width:0;max-width:280px;height:auto;display:block;background:#f7f5ef;border-radius:8px}
.av-curve{fill:none;stroke-width:1.8;stroke-linejoin:round}
.av-curve-off{stroke:#d3d8da;stroke-width:1.2}
.av-zero{stroke:#dfe6ea;stroke-width:1}
.mini-av-title{fill:var(--muted);font-size:9.5px;font-weight:900;letter-spacing:.03em;text-transform:uppercase}
.mini-av-axis{fill:#8b98a0;font-size:8px;font-weight:700;font-family:ui-monospace,SFMono-Regular,monospace}

.compare-note{margin:0 0 10px;color:var(--muted);font-size:.74rem;line-height:1.4}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.74rem}
th{background:#f2f5f5;color:#53636e;text-align:left;font-size:.62rem;letter-spacing:.03em;text-transform:uppercase}
th,td{padding:8px 7px;border-bottom:1px solid #e5eaec;vertical-align:middle;white-space:nowrap}
td:first-child{font-weight:800;display:flex;align-items:center;gap:8px}
td:nth-child(2),td:nth-child(3){font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
tr.row-dim{opacity:.4}
td.dead-low{color:#96600d}
td.dead-mid{color:#c5504e;font-weight:800}
td.dead-high{color:#a63e3c;font-weight:900}
.status-badge{padding:4px 10px;border-radius:999px;font-size:.68rem;font-weight:900;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
.status-warm{background:#eef1f2;color:#5b6870}
.status-stable{background:#e3f5f3;color:#137674}
.status-wobble{background:#fff2da;color:#96600d}
.status-oscillating{background:#fde9e7;color:#a63e3c}

.note{padding:15px 18px;border-left:4px solid var(--amber);border-radius:8px;background:#fff7e8;color:#66532d;font-size:.84rem}
.note code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:800}

@media(max-width:820px){
  .intro{grid-template-columns:1fr}
  .formula{max-width:400px}
}
@media(max-width:900px){
  .race-row{flex-direction:column}
  .race-table-wrap{min-width:0;padding-left:0;padding-top:16px;border-left:0;border-top:1px solid var(--line)}
}
@media(max-width:560px){
  .shape-slope-strip{flex-wrap:wrap}
  .mini-av-chart{max-width:none}
  .app-shell{padding:25px 16px 35px}
  .card{padding:16px}
  .card-heading{display:block}
  .toolbar,.controls-bar{position:static}
  .controls{width:100%}
  .controls button,.epoch-run-group{flex:1}
}