/* ============ THE MEASUREMENT — speed-test principal act ============
   Pinned ~300vh scroll cinema on /tools/run-speed-test/. One addressed
   timeline, three beats: The question → The method → The verdict.
   Beat 3 reads the LIVE dashboard state (.dverdict / .dstat .v[data-sid])
   — it mirrors the user's own real measurement, never a canned number.
   Photographic backdrops only; scrims for legibility. Transform/opacity
   animation only. html.sa-armed covers the pre-init flash; .sa-on is the
   steady-state stage selector. Without JS+GSAP the beats read as a
   normal stacked section. */

.sact{position:relative;background:#05080f;color:#f4f7fc;overflow:hidden}
.sa-pin{position:relative;height:100vh;height:100svh;overflow:hidden}

/* ---- photographic backdrops, one per beat ---- */
.sa-bgs{position:absolute;inset:0;z-index:0}
.sa-bg{position:absolute;inset:-4%;background-size:cover;background-position:center;will-change:transform,opacity}
.sa-bg1{z-index:1}
.sa-bg2{z-index:2;opacity:0}
.sa-bg3{z-index:3;opacity:0}
.sa-scrim{position:absolute;inset:0;z-index:4;
  background:linear-gradient(180deg,rgba(0,0,0,.84) 0%,rgba(0,0,0,.66) 42%,rgba(0,0,0,.86) 100%)}

/* ---- method diagram ---- */
.sa-diagram{position:absolute;inset:0;z-index:1;width:100%;height:100%;opacity:0}
.sa-wire{stroke:#f5b04c;stroke-width:3;fill:none;stroke-linecap:round;opacity:.95;
  filter:drop-shadow(0 0 8px rgba(245,176,76,.8))}
.sa-node{fill:#fff;filter:drop-shadow(0 0 10px rgba(245,176,76,.9))}
.sa-node-ring{fill:none;stroke:rgba(245,176,76,.55);stroke-width:2}
.sa-packet{fill:#ffe3b3;filter:drop-shadow(0 0 12px #f5b04c)}
.sa-nlabel{fill:rgba(255,255,255,.85);font-size:15px;font-weight:600;font-family:Satoshi,system-ui,sans-serif;letter-spacing:.05em}

/* ---- stage grid ---- */
.sa-stage{position:relative;z-index:3;height:100%;max-width:1280px;margin:0 auto;
  padding:84px 48px 40px;display:flex;align-items:center;justify-content:center}
.sa-copy{position:relative;width:100%;max-width:880px;min-height:460px;text-align:center}
.sa-beat{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px}
html.sa-armed .sa-beat,.sa-on .sa-beat{position:absolute;inset:0}
html.sa-armed .sa-beat2,html.sa-armed .sa-beat3,
.sa-on .sa-beat2,.sa-on .sa-beat3{opacity:0;visibility:hidden}
.sa-kicker{display:flex;align-items:center;gap:12px;margin:0;
  font-size:13px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;color:#ffd9a0}
.sa-chapter{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;
  padding:0 10px;border:1px solid rgba(255,217,160,.55);border-radius:999px;
  font-size:14px;letter-spacing:.12em;color:#ffe9c9}
.sa-title{margin:0;font-size:clamp(2.1rem,5.2vw,3.6rem);line-height:1.05;letter-spacing:-.02em;color:#fff;
  font-family:"Clash Display",Satoshi,system-ui,sans-serif}
.sa-title .sa-ch{display:inline-block;will-change:transform}
.sa-title .sa-w{display:inline-block;white-space:nowrap}
.sa-lede{margin:0;max-width:640px;font-size:1.08rem;line-height:1.65;color:#c9d6ee}

/* ---- beat 1: waveform ---- */
.sa-wave{display:flex;align-items:center;gap:5px;height:64px;margin-top:8px}
.sa-wave i{display:block;width:5px;border-radius:3px;background:linear-gradient(180deg,#ffd9a0,#f5b04c);
  height:20%;transform-origin:center}

/* ---- beat 2: byte counter ---- */
.sa-bytes{margin-top:6px;background:rgba(255,255,255,.06);border:1px solid rgba(255,217,160,.35);
  border-radius:18px;padding:20px 34px;backdrop-filter:blur(6px)}
.sa-bytes .sa-bfig{font-size:2.4rem;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.sa-bytes small{display:block;font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:#ffd9a0;margin-top:6px}

/* ---- beat 3: verdict card (mirrors the live dashboard) ---- */
.sa-verdict{margin-top:6px;background:rgba(255,255,255,.06);border:1px solid rgba(255,217,160,.4);
  border-radius:20px;padding:26px 40px;max-width:520px;backdrop-filter:blur(6px)}
.sa-verdict .sa-vgrade{font-size:.85rem;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:#ffd9a0}
.sa-verdict .sa-vfig{font-size:3rem;font-weight:700;color:#fff;letter-spacing:-.02em;font-variant-numeric:tabular-nums;margin:8px 0 4px}
.sa-verdict .sa-vfig small{font-size:1.1rem;font-weight:400;color:#c9d6ee}
.sa-verdict .sa-vnote{margin:0;font-size:.95rem;line-height:1.6;color:#c9d6ee}
.sa-verdict.is-collapsed{transform:scale(.55);opacity:0}
.sa-cta{margin-top:10px}

/* ---- scroll hint ---- */
.sa-hint{position:absolute;z-index:4;left:50%;bottom:26px;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;opacity:0;
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:#ffd9a0}
html.sa-armed .sa-hint,.sa-on .sa-hint{display:flex}
.sa-hint i{display:block;width:1px;height:44px;background:linear-gradient(180deg,#ffd9a0,transparent);
  animation:sa-hint 1.8s ease-in-out infinite}
@keyframes sa-hint{0%,100%{transform:scaleY(.4);transform-origin:top;opacity:.5}50%{transform:scaleY(1);opacity:1}}

/* ---- no stage mode: stacked readable section ---- */
html:not(.sa-armed) .sact:not(.sa-on){background:#0a1220}
html:not(.sa-armed) .sact:not(.sa-on) .sa-bgs,
html:not(.sa-armed) .sact:not(.sa-on) .sa-diagram{display:none}
html:not(.sa-armed) .sact:not(.sa-on) .sa-beat{padding:56px 0}
html:not(.sa-armed) .sact:not(.sa-on) .sa-hint{display:none}

@media (max-width:760px){
  .sa-stage{padding:72px 22px 30px}
  .sa-copy{min-height:540px}
  .sa-verdict{padding:20px 26px}
  .sa-verdict .sa-vfig{font-size:2.3rem}
}