:root {
  --bg: #0f1419;
  --card: #1a2129;
  --card2: #202a35;
  --text: #e6edf3;
  --muted: #9aa7b2;
  --accent: #4fc3f7;
  --green: #6fdd8b;
  --amber: #ffc86b;
  --red: #ff8a80;
  --border: #2c3944;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 0 14px 70px;
}
section, header, footer { max-width: 1100px; margin: 0 auto; }
header { margin-top: 26px; }
h1 { margin: 0 0 6px; font-size: 1.8em; }
h2 {
  font-size: 1.3em; margin: 42px 0 6px;
  border-bottom: 2px solid var(--border); padding-bottom: 8px;
}
h3 { font-size: 1.05em; margin: 22px 0 6px; }
.sub, .lead { color: var(--muted); max-width: 78ch; margin: 0 0 4px; }
.sub strong, .lead strong { color: var(--text); }
.fineprint { color: var(--muted); font-size: 0.85em; max-width: 80ch; }

/* callouts */
.callouts { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin: 18px 0 6px; }
.callout {
  background: #14303d; border: 1px solid #235a72; border-left: 4px solid var(--accent);
  border-radius: 10px; padding: 12px 14px; font-size: 0.95em;
}
.callout.bad { background: #351d1d; border-color: #6b3434; border-left-color: var(--red); }
.callout.good { background: #17301f; border-color: #2f5c3c; border-left-color: var(--green); }
.callout em { color: var(--accent); font-style: normal; font-weight: 700; }

/* measurement how-to */
.measure-how {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 4px 18px 14px; margin: 16px 0;
}
.measure-how ol { margin: 8px 0; padding-left: 20px; }
.measure-how li { margin-bottom: 6px; max-width: 80ch; }

/* controls */
.controls { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin: 14px 0 4px; }
.ctl { background: var(--card2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.ctl label { display: block; font-weight: 700; font-size: 0.92em; margin-bottom: 6px; }
.ctl input[type=range] { width: 100%; accent-color: var(--accent); }
.ctl output { display: inline-block; font-variant-numeric: tabular-nums; font-weight: 800; color: var(--accent); font-size: 1.15em; }
.hint { color: var(--muted); font-size: 0.85em; margin: 6px 0 0; }
.toggles .check { font-weight: 500; display: block; margin-bottom: 8px; cursor: pointer; }
.toggles input { accent-color: var(--accent); margin-right: 6px; }

/* chart */
.chart { margin-top: 16px; }
.plot { position: relative; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 14px 14px; }
.row { display: grid; grid-template-columns: 200px 1fr 92px; gap: 10px; align-items: center; margin-bottom: 7px; position: relative; z-index: 2; }
.rname { font-size: 0.88em; color: var(--muted); text-align: right; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rtrack { position: relative; height: 22px; background: #131a21; border-radius: 4px; overflow: hidden; }
.rbar { height: 100%; border-radius: 4px 0 0 4px; opacity: 0.85; }
.rbar.good { background: var(--green); }
.rbar.warn { background: var(--amber); }
.rbar.bad { background: var(--red); }
.rval { position: absolute; right: 8px; top: 0; line-height: 22px; font-size: 0.78em; font-variant-numeric: tabular-nums; color: var(--text); }
.rval em { color: var(--muted); font-style: normal; }
.rchip { font-size: 0.72em; text-align: center; padding: 3px 0; border-radius: 20px; font-weight: 800; letter-spacing: 0.03em; text-transform: uppercase; }
.rchip.good, .chip.good { background: #1d4029; color: var(--green); }
.rchip.warn, .chip.warn { background: #423418; color: var(--amber); }
.rchip.bad, .chip.bad { background: #431f1f; color: var(--red); }
.markers { position: absolute; top: 6px; bottom: 10px; left: 224px; right: 116px; z-index: 3; pointer-events: none; }
.marker { position: absolute; top: 0; bottom: 0; width: 0; }
.marker::before { content: ''; position: absolute; top: 18px; bottom: 0; left: 0; width: 2px; }
.thumbline::before { background: var(--accent); }
.seline::before { background: transparent; border-left: 2px dashed var(--muted); }
.marker span { position: absolute; top: 0; left: 4px; font-size: 0.72em; white-space: nowrap; color: var(--accent); font-weight: 700; }
.seline span { color: var(--muted); left: auto; right: 4px; }
.axis { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.78em; margin: 6px 102px 0 210px; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 0.83em; margin-top: 10px; }
.legend .sw { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.sw.good { background: var(--green); } .sw.warn { background: var(--amber); } .sw.bad { background: var(--red); }
.empty { color: var(--muted); }

/* cards */
.tier { margin-top: 26px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); margin-top: 12px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); position: relative; overflow: hidden; }
.card.toppick { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.card.dim { opacity: 0.55; }
.card.dim:hover { opacity: 1; }
.ribbon {
  position: absolute; top: 12px; right: 0;
  background: var(--accent); color: #06222e; font-weight: 800; font-size: 0.68em;
  letter-spacing: 0.06em; padding: 4px 10px; border-radius: 6px 0 0 6px;
}
.ribbon.warn { background: var(--amber); color: #3a2a00; }
.ribbon.alt { background: var(--border); color: var(--text); }
.cbody { padding: 14px 16px 16px; }
.cbody h4 { margin: 0 0 8px; font-size: 1.05em; padding-right: 70px; }
.chip { font-size: 0.62em; padding: 3px 8px; border-radius: 20px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; vertical-align: 2px; white-space: nowrap; }
.specs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.specs span { background: var(--card2); border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; font-size: 0.78em; color: var(--muted); }
.specs .wbig { color: var(--text); font-weight: 800; }
.specs .price { color: var(--green); border-color: #2f5c3c; }
.delta { font-size: 0.85em; font-weight: 700; margin: 0 0 2px; }
.delta.g { color: var(--green); } .delta.b { color: var(--amber); }
.dims { font-size: 0.8em; color: var(--muted); margin: 0 0 10px; font-variant-numeric: tabular-nums; }
.cbody p.good, .cbody p.bad, .cbody p.note { font-size: 0.9em; margin: 0 0 8px; }
.cbody p.good strong { color: var(--green); }
.cbody p.bad strong { color: var(--red); }
.cbody p.note { color: var(--accent); border-top: 1px solid var(--border); padding-top: 8px; margin-bottom: 0; }

/* plan */
.steps { max-width: 84ch; padding-left: 22px; }
.steps li { margin-bottom: 10px; }
footer { margin-top: 50px; color: var(--muted); font-size: 0.85em; border-top: 1px solid var(--border); padding-top: 14px; }
footer a { color: var(--accent); }

@media (max-width: 700px) {
  .row { grid-template-columns: 104px 1fr 70px; }
  .markers { left: 130px; right: 94px; }
  .axis { margin: 6px 80px 0 114px; }
  .rname { font-size: 0.78em; }
}

/* ---- to-scale footprints ---- */
.scalerow {
  display: flex; gap: 14px; align-items: flex-end;
  overflow-x: auto; padding: 18px 4px 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  margin-top: 14px;
  scrollbar-color: var(--border) transparent;
}
.fpfig { margin: 0; flex: 0 0 auto; text-align: center; }
.fpfig svg { display: block; }
.fpfig figcaption {
  font-size: 0.76em; color: var(--muted); margin-top: 2px;
  max-width: 130px; line-height: 1.25;
}

/* ---- product shots on cards ---- */
.cimg {
  height: 178px; background: #f4f6f8; display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--border);
}
.cimg img { max-height: 160px; max-width: 86%; object-fit: contain; display: block; }
.noshot {
  width: 86px; height: 150px; border: 2px dashed #9aa7b2; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; text-align: center;
}
.noshot span { font-size: 0.72em; color: #6b7883; padding: 0 6px; line-height: 1.2; }

.scrollhint { color: var(--muted); font-size: 0.78em; text-align: center; margin: 6px 0 0; }
@media (min-width: 1700px) { .scrollhint { display: none; } }