.pulse{max-width:1160px;margin:auto;padding:24px 20px 65px;color:#f2f8ff}.pulse header h1{font-size:clamp(2.5rem,6vw,4rem);margin:.2em 0}.pulse header p{font-size:1.1rem}.pulseSettings,.pulseMetrics{display:flex;flex-wrap:wrap;align-items:end;gap:15px;margin:24px 0}.pulseSettings label{display:grid;gap:7px}.pulse select,.pulse button{font:inherit;color:#fff;background:#12345b;border:1px solid #5685b0;border-radius:12px;padding:13px;cursor:pointer}.pulseSettings button{background:#006f9e;border-color:#40e4ff;font-weight:700}.pulseBoard,.pulseSummary{border:1px solid #376990;background:#102747;border-radius:23px;padding:24px;margin:20px 0}.pulseMetrics{margin:0;align-items:center}.pulseMetrics>span,.pulseMetrics>b{background:#081c34;padding:10px 14px;border-radius:12px}.pulseMetrics strong{color:#69ebff}.pulsePrompt{text-align:center;margin:35px 0 22px}.pulsePrompt h2{font-size:clamp(1.7rem,4vw,2.7rem);min-height:2em}.pulseChoices{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.pulseChoices button{min-height:155px;display:grid;place-items:center;gap:7px;background:#173b64;font-size:1.05rem}.pulseChoices .pulseSymbol{font-size:3.8rem;line-height:1.1}.pulseChoices button:hover,.pulseChoices button:focus-visible{border-color:#49e6ff;transform:translateY(-2px)}.pulseChoices button.correct{border-color:#33d9fb;box-shadow:0 0 22px #00c9ff}.pulseChoices button.wrong{border-color:#ff5572;box-shadow:0 0 20px #f04562}.pulseSummary a{color:#73e8fa}.pulseSummary p{line-height:1.5}@media(max-width:720px){.pulseChoices{grid-template-columns:repeat(2,1fr)}.pulseChoices button{min-height:140px}.pulseMetrics{gap:7px}.pulseMetrics>*{font-size:.9rem}}