/* =======================================================================
   VAYU · Overview — the value proposition, the operating loop, the roles,
   the scenario ladder and the proactive timeline, told visually.
   Light theme throughout; every animation is disabled under
   prefers-reduced-motion, and every figure is rendered server-side so the
   page still reads correctly with JavaScript off.
   ======================================================================= */
.ov{--ov-accent:#0b7ad1;--ov-accent-deep:#064f8c;--ov-cyan:#14b4d6;--ov-green:#17a87a;
    --ov-amber:#d9922b;--ov-red:#d15545;--ov-violet:#7d65b1;
    --ov-ink:#13303f;--ov-soft:#5d7382;--ov-line:#e3ebf2;
    display:grid;gap:26px;padding-bottom:10px}
.ov section{scroll-margin-top:90px}
.ov h2{font:800 24px Manrope,sans-serif;letter-spacing:-.5px;color:var(--ov-ink);margin:0 0 7px}
.ov h3{font:700 15px Manrope,sans-serif;color:var(--ov-ink);margin:0 0 6px}
.ov p{margin:0;color:var(--ov-soft);line-height:1.65}
.ov-kicker{display:inline-flex;align-items:center;gap:7px;font:800 9px 'DM Sans',sans-serif;
  letter-spacing:1.7px;color:var(--ov-accent);margin-bottom:10px}
.ov-kicker::before{content:'';width:16px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--ov-accent),var(--ov-cyan))}
.ov-lede{max-width:70ch;font-size:14px}
.ov-head{margin-bottom:20px}

/* reveal-on-scroll */
.rv{opacity:0;transform:translateY(16px);
  transition:opacity .62s cubic-bezier(.2,.7,.3,1),transform .62s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}

/* ---------- 1. hero ---------- */
.ov-hero{position:relative;overflow:hidden;border-radius:20px;padding:34px 36px;
  border:1px solid #dbe8f4;
  background:
    radial-gradient(90% 120% at 100% 0%,#e4f4ff 0%,rgba(228,244,255,0) 60%),
    radial-gradient(70% 110% at 0% 100%,#e8fbf4 0%,rgba(232,251,244,0) 55%),
    linear-gradient(135deg,#ffffff 0%,#f4faff 100%);
  box-shadow:0 1px 2px rgba(16,60,96,.05),0 30px 60px -48px rgba(11,122,209,.75)}
.ov-hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:34px;
  align-items:center;position:relative;z-index:2}
.ov-hero h1{font:800 38px Manrope,sans-serif;letter-spacing:-1.3px;line-height:1.14;
  margin:0 0 14px;color:#0d2b3a}
.ov-hero h1 em{font-style:normal;
  background:linear-gradient(96deg,var(--ov-accent-deep),var(--ov-accent) 55%,var(--ov-cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.ov-hero .ov-lede{font-size:14.5px}
.ov-hero-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.ov-btn{display:inline-flex;align-items:center;gap:8px;border-radius:10px;padding:11px 16px;
  font:700 12px 'DM Sans',sans-serif;text-decoration:none;border:1px solid transparent;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease}
.ov-btn.primary{color:#fff;
  background:linear-gradient(135deg,var(--ov-accent) 0%,var(--ov-accent-deep) 100%);
  box-shadow:0 10px 20px -12px rgba(11,122,209,.85)}
.ov-btn.ghost{color:var(--ov-accent-deep);background:#fff;border-color:#d4e6f6}
.ov-btn:hover{transform:translateY(-2px);box-shadow:0 14px 26px -12px rgba(11,122,209,.75)}
.ov-btn svg{width:15px;height:15px}

/* drifting haze — the page's one ambient animation */
.ov-haze{position:absolute;inset:0;z-index:1;pointer-events:none;overflow:hidden}
.ov-haze i{position:absolute;display:block;border-radius:50%;filter:blur(22px);opacity:.5;
  animation:ovDrift linear infinite}
.ov-haze i:nth-child(1){width:190px;height:190px;left:8%;top:-40px;background:#cfe6f8;
  animation-duration:26s}
.ov-haze i:nth-child(2){width:150px;height:150px;left:46%;top:40%;background:#dff2e9;
  animation-duration:34s;animation-delay:-8s}
.ov-haze i:nth-child(3){width:220px;height:220px;left:72%;top:-60px;background:#dceeff;
  animation-duration:30s;animation-delay:-14s}
.ov-haze i:nth-child(4){width:120px;height:120px;left:24%;top:62%;background:#f3e6d6;
  animation-duration:38s;animation-delay:-20s}
@keyframes ovDrift{
  0%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(42px,-26px,0) scale(1.14)}
  100%{transform:translate3d(0,0,0) scale(1)}}

/* AQI dial */
.ov-dial{position:relative;display:grid;place-items:center;justify-self:center}
.ov-dial svg{width:min(230px,58vw);height:min(230px,58vw);transform:rotate(-90deg)}
.ov-dial-track{fill:none;stroke:#e8eff5;stroke-width:13;stroke-linecap:round}
.ov-dial-arc{fill:none;stroke:url(#ovDialGrad);stroke-width:13;stroke-linecap:round;
  stroke-dasharray:0 999;transition:stroke-dasharray 1.6s cubic-bezier(.2,.7,.3,1)}
.ov-dial-face{position:absolute;text-align:center}
.ov-dial-val{font:800 46px Manrope,sans-serif;letter-spacing:-2px;color:#0d2b3a;line-height:1;
  font-variant-numeric:tabular-nums}
.ov-dial-cap{font:800 8.5px 'DM Sans',sans-serif;letter-spacing:1.5px;color:#8ca2b3;margin-top:7px}
.ov-dial-band{margin-top:9px;display:inline-block;border-radius:999px;padding:5px 11px;
  font:800 9.5px 'DM Sans',sans-serif;letter-spacing:.9px}
.band-0{background:#e6f6ee;color:#157a59}
.band-1{background:#fff4e2;color:#9a6a1b}
.band-2{background:#fdeee6;color:#a8542a}
.band-3{background:#fdeaea;color:#a93434}
.band-4{background:#f6e7f3;color:#8a2f72}
.ov-dial-note{margin-top:12px;max-width:26ch;text-align:center;font-size:10.5px;color:#90a3b1;
  line-height:1.55}

/* counter strip */
.ov-counters{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-top:26px;
  position:relative;z-index:2}
.ov-count{background:#fff;border:1px solid #e4edf5;border-radius:13px;padding:14px 15px;
  box-shadow:0 1px 2px rgba(16,60,96,.04)}
.ov-count b{display:block;font:800 26px Manrope,sans-serif;letter-spacing:-1px;color:#0d2b3a;
  font-variant-numeric:tabular-nums}
.ov-count span{display:block;font:700 9px 'DM Sans',sans-serif;letter-spacing:1.2px;color:#8ca2b3;
  margin-top:5px}
.ov-count small{display:block;font-size:10px;color:#9fb0bc;margin-top:6px;line-height:1.45}

/* ---------- generic surface ---------- */
.ov-card{background:#fff;border:1px solid var(--ov-line);border-radius:16px;padding:22px 24px;
  box-shadow:0 1px 2px rgba(16,60,96,.04)}

/* ---------- 2. the shift ---------- */
.ov-shift{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ov-shift>div{border-radius:16px;padding:22px 24px;border:1px solid var(--ov-line);
  position:relative;overflow:hidden}
.ov-before{background:#fbfcfd}
.ov-after{background:linear-gradient(135deg,#ffffff,#f1faff);border-color:#d9ebf9}
.ov-tag{display:inline-block;font:800 8.5px 'DM Sans',sans-serif;letter-spacing:1.5px;
  border-radius:999px;padding:5px 10px;margin-bottom:13px}
.ov-tag.cold{background:#eef2f5;color:#76868f}
.ov-tag.warm{background:#e3f3ff;color:var(--ov-accent-deep)}
.ov-frag{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.ov-frag span{font:600 11px 'DM Sans',sans-serif;border-radius:8px;padding:8px 11px;
  background:#fff;border:1px dashed #d6dfe6;color:#7a8b95}
.ov-before .ov-frag span{animation:ovJitter 5s ease-in-out infinite}
.ov-before .ov-frag span:nth-child(2){animation-delay:-.9s}
.ov-before .ov-frag span:nth-child(3){animation-delay:-1.8s}
.ov-before .ov-frag span:nth-child(4){animation-delay:-2.7s}
.ov-before .ov-frag span:nth-child(5){animation-delay:-3.6s}
@keyframes ovJitter{
  0%,100%{transform:translate(0,0) rotate(0)}
  25%{transform:translate(3px,-3px) rotate(-1.1deg)}
  50%{transform:translate(-2px,2px) rotate(.9deg)}
  75%{transform:translate(2px,3px) rotate(-.6deg)}}
.ov-after .ov-frag span{border-style:solid;border-color:#cfe6f8;color:var(--ov-accent-deep);
  background:#f4faff;font-weight:700}
.ov-spine{position:relative;margin-top:18px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,#d6ebfb,#bfe4f7)}
.ov-spine::after{content:'';position:absolute;top:-2.5px;left:0;width:34px;height:8px;
  border-radius:8px;background:linear-gradient(90deg,var(--ov-accent),var(--ov-cyan));
  box-shadow:0 0 14px rgba(11,122,209,.6);
  animation:ovRun 3.4s cubic-bezier(.5,0,.5,1) infinite}
@keyframes ovRun{0%{left:0}100%{left:calc(100% - 34px)}}

/* ---------- 3. the loop ---------- */
.ov-loop-rail{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));
  gap:10px;margin:22px 0 18px}
.ov-loop-rail::before{content:'';position:absolute;left:8%;right:8%;top:26px;height:2px;
  border-radius:2px;background:linear-gradient(90deg,#dceaf4,#cfe6f8 45%,#d8f0ea)}
.ov-stage{position:relative;z-index:2;background:transparent;border:0;padding:0;cursor:pointer;
  font-family:inherit;text-align:center;display:grid;justify-items:center;gap:9px}
.ov-stage-dot{width:54px;height:54px;border-radius:17px;display:grid;place-items:center;
  background:#fff;border:1px solid #dfeaf2;color:#7e94a3;
  box-shadow:0 1px 3px rgba(16,60,96,.07);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s,background .22s,color .22s}
.ov-stage-dot svg{width:22px;height:22px}
.ov-stage b{font:800 10px 'DM Sans',sans-serif;letter-spacing:1.2px;color:#8ca2b3;
  transition:color .22s}
.ov-stage:hover .ov-stage-dot{transform:translateY(-3px)}
.ov-stage.on .ov-stage-dot{color:#fff;border-color:transparent;
  transform:translateY(-3px) scale(1.06);
  background:linear-gradient(140deg,var(--ov-accent) 0%,var(--ov-accent-deep) 100%);
  box-shadow:0 12px 24px -10px rgba(11,122,209,.85)}
.ov-stage.on b{color:var(--ov-accent-deep)}
.ov-stage-panel{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;
  border-radius:16px;border:1px solid #dcebf6;padding:22px 24px;
  background:linear-gradient(135deg,#ffffff,#f5fbff)}
.ov-stage-panel.swap{animation:ovFade .42s ease}
@keyframes ovFade{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.ov-stage-panel h3{font-size:17px}
.ov-stage-who{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.ov-stage-who span{font:700 10px 'DM Sans',sans-serif;border-radius:999px;padding:5px 10px;
  background:#e9f4fd;color:var(--ov-accent-deep);border:1px solid #d6e9f8}
.ov-stage-facts{display:grid;gap:9px;align-content:start}
.ov-fact{display:flex;gap:11px;align-items:baseline;background:#fff;border:1px solid #e4edf5;
  border-radius:11px;padding:11px 13px}
.ov-fact b{font:800 17px Manrope,sans-serif;color:var(--ov-accent-deep);min-width:62px;
  font-variant-numeric:tabular-nums}
.ov-fact span{font-size:11.5px;color:var(--ov-soft);line-height:1.5}

/* ---------- 4. the relay ---------- */
.ov-relay{position:relative;border-radius:16px;border:1px solid var(--ov-line);background:#fff;
  padding:24px 24px 20px;overflow:hidden}
.ov-relay-track{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));
  gap:8px;margin-top:20px}
.ov-relay-track::before{content:'';position:absolute;left:8%;right:8%;top:17px;height:2px;
  background:repeating-linear-gradient(90deg,#d8e6f0 0 7px,transparent 7px 14px)}
.ov-relay-step{position:relative;z-index:2;display:grid;justify-items:center;gap:8px;
  text-align:center}
.ov-relay-node{width:36px;height:36px;border-radius:12px;background:#fff;border:1px solid #dfeaf2;
  display:grid;place-items:center;font:800 11px Manrope,sans-serif;color:#90a4b2;
  transition:all .3s ease}
.ov-relay-step.lit .ov-relay-node{color:#fff;border-color:transparent;
  background:linear-gradient(140deg,var(--ov-accent),var(--ov-accent-deep));
  box-shadow:0 0 0 5px rgba(11,122,209,.11),0 10px 20px -10px rgba(11,122,209,.8)}
.ov-relay-step b{font:700 11px 'DM Sans',sans-serif;color:#44606f}
.ov-relay-step small{font-size:9.5px;color:#92a5b2;line-height:1.45;max-width:18ch}
.ov-relay-owner{font:800 8px 'DM Sans',sans-serif;letter-spacing:1.1px;color:var(--ov-accent);
  opacity:0;transition:opacity .3s}
.ov-relay-step.lit .ov-relay-owner{opacity:1}

/* ---------- 5. roles ---------- */
.ov-roles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.ov-role{background:#fff;border:1px solid var(--ov-line);border-radius:16px;padding:20px 21px;
  position:relative;overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.ov-role::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--role,#0b7ad1);opacity:.85}
.ov-role:hover{transform:translateY(-4px);border-color:#d3e6f6;
  box-shadow:0 18px 34px -24px rgba(13,60,96,.65)}
.ov-role-top{display:flex;align-items:center;gap:11px;margin-bottom:5px}
.ov-role-ico{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex:none;
  background:var(--roleBg,#eaf4fd);color:var(--role,#0b7ad1);border:1px solid var(--roleLine,#d7e8f8)}
.ov-role-ico svg{width:19px;height:19px}
.ov-role-top b{font:800 15px Manrope,sans-serif;color:var(--ov-ink);display:block}
.ov-role-top span{font:700 9px 'DM Sans',sans-serif;letter-spacing:1.1px;color:#9fb0bc;
  display:block;margin-top:3px}
.ov-role dl{margin:15px 0 0;display:grid;gap:11px}
.ov-role dt{font:800 8.5px 'DM Sans',sans-serif;letter-spacing:1.3px;color:#a0b1bd;margin-bottom:4px}
.ov-role dd{margin:0;font-size:11.5px;color:var(--ov-soft);line-height:1.55}
.ov-role-link{display:inline-flex;align-items:center;gap:6px;margin-top:15px;
  font:700 10.5px 'DM Sans',sans-serif;color:var(--ov-accent-deep);text-decoration:none}
.ov-role-link:hover{text-decoration:underline}
.ov-role-link::after{content:'\2192';transition:transform .18s ease}
.ov-role:hover .ov-role-link::after{transform:translateX(3px)}

/* ---------- 6. map layers ---------- */
.ov-layers{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1fr);gap:28px;
  align-items:center}
.ov-stack{position:relative;display:grid;gap:10px}
.ov-stack svg{display:block;width:100%;max-width:560px;height:auto;margin:0 auto;
  border-radius:16px}
.ov-stack-note{font-size:10.5px;line-height:1.55;color:#93a6b3;text-align:center;margin:0}
.ov-stack-note a{color:var(--ov-accent-deep);font-weight:700;text-decoration:none}
.ov-stack-note a:hover{text-decoration:underline}

/* each map layer dims when the reader isolates another one */
.ov-ml{transition:opacity .32s ease}
.ov-stack.focusing .ov-ml{opacity:.12}
.ov-stack.focusing .ov-ml[data-layer="0"]{opacity:.55}
.ov-stack.focusing .ov-ml.lift{opacity:1}

/* live station pings */
.ov-ping-wave{transform-box:fill-box;transform-origin:center;
  animation:ovPing 2.8s cubic-bezier(.2,.6,.4,1) infinite}
.ov-ping-2 .ov-ping-wave{animation-delay:-.95s}
.ov-ping-3 .ov-ping-wave{animation-delay:-1.9s}
@keyframes ovPing{
  0%{transform:scale(.5);opacity:.85}
  70%{transform:scale(2.6);opacity:0}
  100%{transform:scale(2.6);opacity:0}}

/* hotspot breathing */
.ov-hot-core{transform-box:fill-box;transform-origin:center;
  animation:ovBreathe 3.4s ease-in-out infinite}
@keyframes ovBreathe{0%,100%{transform:scale(1);opacity:.75}50%{transform:scale(1.22);opacity:.5}}
.ov-pin{transform-box:fill-box;transform-origin:center bottom;
  animation:ovPinBob 3.4s ease-in-out infinite}
@keyframes ovPinBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}

/* the survey sweep that reads the city left to right */
.ov-sweep{animation:ovSweep 7s linear infinite}
@keyframes ovSweep{0%{transform:translateX(0)}100%{transform:translateX(680px)}}

.ov-legend{display:grid;gap:10px}
.ov-legend button{display:flex;align-items:center;gap:12px;background:#fff;
  border:1px solid var(--ov-line);border-radius:12px;padding:12px 14px;text-align:left;
  cursor:pointer;font-family:inherit;width:100%;
  transition:border-color .18s,box-shadow .18s,transform .18s}
.ov-legend button:hover,.ov-legend button.on{transform:translateX(3px);border-color:#cfe4f5;
  box-shadow:0 10px 20px -16px rgba(13,60,96,.7)}
.ov-legend .sw{width:11px;height:11px;border-radius:4px;flex:none}
.ov-legend b{font:700 12px 'DM Sans',sans-serif;color:var(--ov-ink);display:block}
.ov-legend small{display:block;font-size:10.5px;color:#90a3b1;margin-top:3px;line-height:1.5}
.ov-legend .n{margin-left:auto;font:800 15px Manrope,sans-serif;color:var(--ov-accent-deep);
  font-variant-numeric:tabular-nums}

/* ---------- 7. scenario ---------- */
.ov-scn{border-radius:18px;border:1px solid #dcebf6;padding:24px;
  background:linear-gradient(135deg,#ffffff,#f3faff)}
.ov-scn-top{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;align-items:end;
  margin-bottom:18px}
.ov-slider-scale{display:flex;height:9px;border-radius:9px;overflow:hidden;margin-bottom:11px}
.ov-slider-scale i:nth-child(1){background:#5bbd92;flex:.2}
.ov-slider-scale i:nth-child(2){background:#9ccf6b;flex:.2}
.ov-slider-scale i:nth-child(3){background:#e8c45a;flex:.2}
.ov-slider-scale i:nth-child(4){background:#e59a52;flex:.2}
.ov-slider-scale i:nth-child(5){background:#d9675a;flex:.1}
.ov-slider-scale i:nth-child(6){background:#a4517f;flex:.1}
.ov-scn input[type=range]{width:100%;-webkit-appearance:none;appearance:none;
  background:transparent;cursor:pointer;margin:0}
.ov-scn input[type=range]::-webkit-slider-runnable-track{height:5px;border-radius:5px;
  background:#dce8f0}
.ov-scn input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;
  width:24px;height:24px;border-radius:50%;margin-top:-9.5px;background:#fff;
  border:3px solid var(--ov-accent);box-shadow:0 3px 10px rgba(11,122,209,.5);
  transition:transform .15s}
.ov-scn input[type=range]:active::-webkit-slider-thumb{transform:scale(1.14)}
.ov-scn input[type=range]::-moz-range-track{height:5px;border-radius:5px;background:#dce8f0}
.ov-scn input[type=range]::-moz-range-thumb{width:19px;height:19px;border-radius:50%;
  background:#fff;border:3px solid var(--ov-accent);box-shadow:0 3px 10px rgba(11,122,209,.5)}
.ov-scn-read{text-align:right;min-width:190px}
.ov-scn-aqi{font:800 50px Manrope,sans-serif;letter-spacing:-2.4px;color:#0d2b3a;line-height:1;
  font-variant-numeric:tabular-nums}
.ov-scn-stage{display:inline-block;margin-top:9px;border-radius:999px;padding:6px 13px;
  font:800 10px 'DM Sans',sans-serif;letter-spacing:1px;transition:background .3s,color .3s}
.ov-scn-hint{font-size:10.5px;color:#90a3b1;margin-top:8px}
.ov-scn-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px;margin-bottom:17px}
.ov-scn-stat{background:#fff;border:1px solid #e3eef6;border-radius:12px;padding:13px 14px}
.ov-scn-stat b{display:block;font:800 23px Manrope,sans-serif;color:#0d2b3a;
  font-variant-numeric:tabular-nums}
.ov-scn-stat span{display:block;font:700 9px 'DM Sans',sans-serif;letter-spacing:1.1px;
  color:#95a8b5;margin-top:5px}
.ov-measures{display:grid;gap:8px;max-height:330px;overflow-y:auto;padding-right:4px}
.ov-measures::-webkit-scrollbar{width:8px}
.ov-measures::-webkit-scrollbar-thumb{background:#d4e0e9;border-radius:8px}
.ov-measure{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;
  background:#fff;border:1px solid #e4eef6;border-radius:11px;padding:11px 13px;
  animation:ovSlideIn .42s cubic-bezier(.2,.7,.3,1) both}
@keyframes ovSlideIn{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:none}}
.ov-measure-stage{font:800 8.5px 'DM Sans',sans-serif;letter-spacing:.8px;border-radius:6px;
  padding:5px 7px;white-space:nowrap}
.ov-measure p{font-size:11.5px;color:#43596a;line-height:1.5;margin:0}
.ov-measure small{display:block;font-size:10px;color:#93a6b3;margin-top:4px}
.ov-measure-owner{font:700 10px 'DM Sans',sans-serif;color:var(--ov-accent-deep);
  white-space:nowrap;background:#eef7fe;border:1px solid #daebf9;border-radius:999px;padding:5px 10px}
.ov-scn-empty{background:#fff;border:1px dashed #d9e4ec;border-radius:12px;padding:22px;
  font-size:12px;color:#8fa2af;text-align:center;line-height:1.6}
.st-1{background:#fff6e4;color:#96681c}
.st-2{background:#fdefe4;color:#a35d25}
.st-3{background:#fdeaea;color:#a83a33}
.st-4{background:#f7e8f4;color:#8c2f73}

/* ---------- 8. proactive timeline ---------- */
.ov-time{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px;
  margin-top:24px}
.ov-time::before{content:'';position:absolute;left:3%;right:3%;top:11px;height:3px;
  border-radius:3px;background:#e3edf4}
.ov-time-fill{position:absolute;left:3%;top:11px;height:3px;border-radius:3px;width:0;
  background:linear-gradient(90deg,var(--ov-cyan),var(--ov-accent),var(--ov-accent-deep));
  box-shadow:0 0 14px rgba(11,122,209,.5);transition:width 1.6s cubic-bezier(.2,.7,.3,1)}
.ov-time-step{position:relative;z-index:2;display:grid;gap:9px;justify-items:start}
.ov-time-dot{width:25px;height:25px;border-radius:50%;background:#fff;border:3px solid #dfeaf2;
  display:grid;place-items:center;
  transition:border-color .35s,box-shadow .35s,transform .35s}
.ov-time-dot::after{content:'';width:7px;height:7px;border-radius:50%;background:#cbd9e3;
  transition:background .35s}
.ov-time-step.on .ov-time-dot{border-color:var(--ov-accent);transform:scale(1.1);
  box-shadow:0 0 0 5px rgba(11,122,209,.1)}
.ov-time-step.on .ov-time-dot::after{background:var(--ov-accent)}
.ov-time-when{font:800 9.5px 'DM Sans',sans-serif;letter-spacing:1.1px;color:var(--ov-accent)}
.ov-time-step b{font:700 12.5px 'DM Sans',sans-serif;color:var(--ov-ink);display:block;
  margin-top:-2px}
.ov-time-step p{font-size:11px;line-height:1.55}
.ov-time-step em{display:block;font-style:normal;font:700 9.5px 'DM Sans',sans-serif;
  letter-spacing:.6px;color:#9fb0bc;margin-top:6px}

/* ---------- 9. close ---------- */
.ov-close{border-radius:18px;padding:28px 30px;border:1px solid #d7e8f6;
  background:radial-gradient(90% 140% at 0% 0%,#e9f6ff,rgba(233,246,255,0) 60%),
             linear-gradient(135deg,#ffffff,#f3faff);
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.ov-close h2{margin-bottom:6px}
.ov-close p{max-width:60ch;font-size:13px}
.ov-honest{font-size:11px;line-height:1.65;color:#8da0ad;background:#fbfcfd;
  border:1px solid #e6edf2;border-radius:12px;padding:13px 15px}
.ov-honest b{color:#5f7482}

/* ---------- responsive ---------- */
@media(max-width:1180px){
  .ov-counters{grid-template-columns:repeat(3,minmax(0,1fr))}
  .ov-roles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ov-loop-rail,.ov-relay-track,.ov-time{grid-template-columns:repeat(3,minmax(0,1fr));
    row-gap:22px}
  .ov-loop-rail::before,.ov-relay-track::before,.ov-time::before,.ov-time-fill{display:none}
}
@media(max-width:980px){
  .ov-hero-grid,.ov-layers,.ov-stage-panel,.ov-shift{grid-template-columns:1fr}
  .ov-hero h1{font-size:30px}
  .ov-scn-top{grid-template-columns:1fr}
  .ov-scn-read{text-align:left}
  .ov-scn-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:680px){
  .ov-hero{padding:24px 20px}
  .ov-hero h1{font-size:25px}
  .ov-counters{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ov-roles{grid-template-columns:1fr}
  .ov-loop-rail,.ov-relay-track,.ov-time{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ov-card,.ov-scn,.ov-relay{padding:18px 16px}
  /* .ov-stack is the frame around the layered map SVG, which sets its own height
     from its viewBox; the 260px fixed height here belonged to the retired
     .ov-layer boxes and cropped the map instead. */
  .ov-scn-aqi{font-size:38px}
  .ov-dial-val{font-size:38px}
  .ov-dial-note{max-width:30ch}
}
@media(prefers-reduced-motion:reduce){
  .ov *,.ov *::before,.ov *::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
}