:root{
  --white:#ffffff; --ice:#f4feff; --mint:#68ead4; --mint2:#a8fff2; --blue:#5aa9ff; --blue2:#cfefff;
  --ink:#113044; --muted:#6e8a9a; --glass:rgba(255,255,255,.58); --glass2:rgba(255,255,255,.34);
  --border:rgba(255,255,255,.82); --shadow:0 22px 70px rgba(63,149,177,.22);
  --green:#3ee7bd; --yellow:#ffd36e; --red:#ff6b82;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0; font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",sans-serif; color:var(--ink);
  background:
    radial-gradient(circle at 14% 4%,rgba(104,234,212,.48),transparent 30%),
    radial-gradient(circle at 90% 8%,rgba(90,169,255,.36),transparent 34%),
    radial-gradient(circle at 50% 100%,rgba(207,239,255,.9),transparent 44%),
    linear-gradient(145deg,#ffffff 0%,#effcff 48%,#dff7ff 100%);
  min-height:100%; overflow-x:hidden;
}
body:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.45) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.5),transparent 70%)}
.app{min-height:100%;padding:calc(env(safe-area-inset-top) + 16px) 15px calc(env(safe-area-inset-bottom) + 20px);max-width:560px;margin:0 auto}.glass{background:linear-gradient(160deg,rgba(255,255,255,.76),rgba(255,255,255,.36));border:1px solid var(--border);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.9);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-radius:32px}.glass-soft{background:linear-gradient(160deg,rgba(255,255,255,.58),rgba(255,255,255,.24));border:1px solid rgba(255,255,255,.7);box-shadow:inset 0 1px 0 rgba(255,255,255,.9);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.hero{padding:19px 18px 18px;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;right:-70px;top:-90px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(104,234,212,.55),transparent 70%);z-index:-1}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.eyebrow{margin:0 0 2px;color:#299bc2;text-transform:uppercase;letter-spacing:.16em;font-size:11px;font-weight:900}h1{font-size:36px;line-height:.95;margin:0;letter-spacing:-.055em}.tiny{border:1px solid rgba(255,255,255,.9);background:rgba(255,255,255,.46);color:#29627c;border-radius:999px;padding:9px 12px;font-weight:800;box-shadow:0 8px 22px rgba(90,169,255,.14)}
.traffic-wrap{display:grid;grid-template-columns:108px 1fr;align-items:center;gap:15px;margin:18px 0 12px}.traffic{border-radius:38px;padding:12px;display:flex;flex-direction:column;gap:10px}.lamp{height:76px;border-radius:28px;display:grid;place-items:center;position:relative;opacity:.32;filter:saturate(.7);transition:.28s ease;box-shadow:inset 0 8px 22px rgba(255,255,255,.58),inset 0 -14px 22px rgba(0,0,0,.05)}.lamp span{font-size:12px;font-weight:950;letter-spacing:.03em;color:rgba(17,48,68,.55);text-transform:uppercase}.lamp.red{background:radial-gradient(circle at 35% 26%,#fff,#ffd3dc 20%,var(--red) 68%)}.lamp.yellow{background:radial-gradient(circle at 35% 26%,#fff,#ffe8a8 22%,var(--yellow) 70%)}.lamp.green{background:radial-gradient(circle at 35% 26%,#fff,#baffef 20%,var(--green) 70%)}.lamp.active{opacity:1;filter:saturate(1.12);transform:scale(1.035);box-shadow:0 0 34px currentColor,inset 0 8px 22px rgba(255,255,255,.72),inset 0 -16px 24px rgba(0,0,0,.06)}.lamp.red.active{color:rgba(255,107,130,.56)}.lamp.yellow.active{color:rgba(255,211,110,.62)}.lamp.green.active{color:rgba(62,231,189,.58)}
.main-readout{text-align:center;letter-spacing:-.08em}.main-readout span:first-child{font-size:96px;font-weight:1000;line-height:.85}.unit{font-size:26px;color:#77a0b3;letter-spacing:0;margin-left:5px;font-weight:900}.pedagogic-card{border-radius:25px;padding:15px 16px;margin-top:3px;min-height:126px}.label{margin:0 0 5px;color:#2d9bbb;text-transform:uppercase;letter-spacing:.15em;font-size:11px;font-weight:950}h2{margin:0 0 6px;font-size:26px;letter-spacing:-.04em}#studentCue{margin:0;color:#557487;font-size:16px;line-height:1.25}.primary{width:100%;margin-top:15px;border:0;border-radius:24px;padding:17px 18px;background:linear-gradient(135deg,var(--mint),var(--blue));color:#073347;font-size:17px;font-weight:1000;box-shadow:0 16px 34px rgba(90,169,255,.24)}.primary:disabled{opacity:.72}.message{min-height:22px;margin:12px 4px 0;color:var(--muted);text-align:center;font-size:13px}.dashboard{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin:12px 0}.mini{border-radius:24px;padding:13px 10px;text-align:center}.mini span{display:block;color:#6d8da0;font-size:12px;font-weight:800}.mini b{display:block;margin-top:3px;font-size:22px;letter-spacing:-.04em}.compact{margin-top:12px;padding:14px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:0 2px 8px}.section-head strong{font-size:16px}.section-head span{font-size:12px;color:#7894a5}canvas{width:100%;height:auto;display:block}.thresholds{display:flex;justify-content:space-between;color:#7894a5;font-size:10px;margin:7px 2px 0}.mode-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}.mode{border:1px solid rgba(255,255,255,.9);background:rgba(255,255,255,.43);border-radius:18px;padding:11px 6px;color:#315e73;font-weight:900}.mode.active{background:linear-gradient(135deg,rgba(104,234,212,.72),rgba(90,169,255,.48));color:#073347;box-shadow:0 10px 25px rgba(90,169,255,.18)}.note{font-size:12px;line-height:1.35;color:#6f8998;text-align:center;margin:14px 10px 0}@media(max-width:390px){.traffic-wrap{grid-template-columns:94px 1fr;gap:10px}.lamp{height:66px;border-radius:24px}.main-readout span:first-child{font-size:78px}h1{font-size:33px}h2{font-size:23px}.mode{font-size:12px}}