:root{color-scheme:light;--blue:#0070c0;--navy:#10416e;--ink:#223345;--muted:#526b7f}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden}
body{background:#fff;color:var(--ink);font:24px/1.35 "PingFang SC","Microsoft YaHei",sans-serif}
#slide{position:absolute;width:1280px;height:720px;padding:28px;display:grid;grid-template-rows:44px 60px 66px 280px 120px 34px;gap:12px;transform-origin:top left;background:#fff;overflow:hidden}
header{display:flex;align-items:center;gap:14px}
h1{font-size:29px;line-height:1.2;color:var(--navy);margin:0 auto 0 0;font-weight:650}
h2{font-size:24px;line-height:1.25;margin:0;font-weight:600}
h2 small{font-size:19px;font-weight:400;color:var(--muted);margin-left:12px}
button,select{font:inherit;color:var(--navy);border:1px solid #bdd0df;background:#fff;border-radius:6px;height:42px}
button{cursor:pointer;padding:0 14px;transition:background .12s,border-color .12s}
button:hover,button[aria-pressed=true]{background:#e8f3fc;border-color:var(--blue);color:var(--blue)}
button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #258fd8;outline-offset:3px}
select{width:268px;padding:0 8px;font-size:22px}
.mode-label{font-size:20px;color:var(--muted)}
#fullscreen{font-size:20px}
.controls{display:flex;align-items:center;gap:16px;border-bottom:1px solid #d9e4ed}
.controls label{white-space:nowrap;font-size:22px}
input[type=range]{width:244px;accent-color:var(--blue);cursor:pointer}
#degrees{min-width:75px;color:var(--blue);font-size:24px;text-align:center}
.presets{display:flex;gap:8px}
.presets button{width:62px;font-size:22px;height:46px}
.device{font-size:18px;color:var(--muted);margin-left:auto;max-width:230px}
.state-strip{display:flex;align-items:center;gap:24px;background:#eef6fc;padding:0 20px;border-left:4px solid var(--blue);font-size:27px}
.state-label{font-size:20px;color:var(--muted)}
.state-note{font-size:20px;color:var(--muted);margin-left:auto}
.mixed-state{font-size:25px}
.workspace{min-height:0}
.phasors{height:100%;display:grid;grid-template-columns:1fr 1fr;gap:32px}
.outlet{display:grid;grid-template-rows:30px 198px 44px;align-items:center}
.outlet:nth-child(2){border-left:1px solid #dde6ed;padding-left:30px}
.outlet h2{color:var(--navy)}
.outlet svg{display:block;width:440px;height:198px;margin:auto}
.equation{font-size:24px;text-align:center}
svg text{font-family:"PingFang SC",sans-serif;font-size:18px;fill:#526b7f}
.mixture{height:100%;display:grid;grid-template-columns:420px 1fr;gap:36px;align-items:center;padding:8px 12px}
.mix-explanation h2{color:var(--navy);margin-bottom:20px}
.mix-explanation p,.mix-calculation p{font-size:22px;line-height:1.65;margin:8px 0;color:var(--muted)}
.mix-calculation{border-left:1px solid #dde6ed;padding-left:30px;font-size:24px;display:grid;gap:28px}
.mix-calculation p{font-size:20px;margin:0}
.measurements{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding-top:12px;border-top:1px solid #d9e4ed}
.probability:nth-child(2){padding-left:30px;border-left:1px solid #dde6ed}
.probability h2{font-size:22px;margin-bottom:10px}
.probability h2 small{font-size:18px}
.barrow{display:grid;grid-template-columns:85px 1fr 80px;gap:14px;align-items:center;height:32px;font-size:21px}
.barrow output{color:var(--navy);font-variant-numeric:tabular-nums;text-align:right;font-size:24px}
.track{height:15px;border-radius:3px;overflow:hidden;background:#e7edf2}
.bar{height:100%;width:0;background:var(--blue);transition:width .1s linear}
.bar.secondary{background:#627b91}
footer{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:18px;white-space:nowrap}
.legend{display:flex;gap:16px;align-items:center}
.legend span:not(.footnote)::before{content:"";display:inline-block;width:20px;margin-right:6px;border-top:3px solid #748b9e;vertical-align:middle}
.legend .v-item::before{border-color:#6ca8d4!important;border-top-style:dashed!important}
.legend .sum-item::before{border-color:#0070c0!important;border-top-width:5px!important}
.samples{font-size:17px}
.katex{font-size:1em}
.mixed-only{display:none}
.is-mixed .pure-only{display:none!important}
.is-mixed .mixed-only{display:flex}
.is-mixed .mixture{display:grid}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Classroom typography: keep primary formulas close to the surrounding slides. */
h1{font-size:40px}h2{font-size:30px}h2 small{font-size:22px}
.state-strip{font-size:34px}.equation{font-size:30px}
.state-label,.state-note{font-size:24px}.controls label,select{font-size:24px}
.probability h2{font-size:26px}.barrow{font-size:26px}.barrow output{font-size:28px}
.mix-explanation p{font-size:26px;line-height:1.5}.mix-calculation{font-size:28px}
.mix-calculation p{font-size:24px}footer{font-size:20px}.samples{font-size:20px}