/* Texas Microreactors: engineer's notebook. Graph paper, charcoal ink, safety mustard. */
:root{--paper:#f6f5f0;--grid:rgba(40,70,100,.07);--card:#fffefb;--ink:#202326;--muted:#5b6066;--mustard:#c7930a;--mustard-d:#8a6400;--steel:#3b5b75;--olive:#5e6b2f;--line:#cfd2d4;
--head:"Franklin Gothic Medium","Arial Narrow","Liberation Sans Narrow","Helvetica Neue",Arial,sans-serif;
--body:"Source Sans 3","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
--mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;color:var(--ink);font-family:var(--body);font-size:1.05rem;line-height:1.6;background-color:var(--paper);
background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px}
a{color:var(--steel);text-underline-offset:2px}
a:hover{color:var(--mustard-d)}
:focus-visible{outline:3px solid var(--mustard);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:5}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--head);font-weight:600;line-height:1.15;margin:0 0 .5rem}
h1{font-size:2.5rem;letter-spacing:-.01em}
h2{font-size:1.55rem}
h3{font-size:1.12rem}
p{margin:0 0 1rem}
li{margin-bottom:.45rem}
.top{border-bottom:2px solid var(--ink);background:var(--card)}
.top .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.3rem 1rem;padding-top:.65rem;padding-bottom:.65rem}
.brand{display:flex;align-items:center;gap:.5rem;font-family:var(--head);font-size:1.15rem;color:var(--ink);text-decoration:none;font-weight:600}
.brand svg{width:26px;height:26px}
.top nav{display:flex;flex-wrap:wrap;gap:.1rem .9rem}
.top nav a{font-family:var(--mono);font-size:.8rem;color:var(--ink);text-decoration:none;text-transform:uppercase;letter-spacing:.04em}
.top nav a:hover{text-decoration:underline}
.hero{padding:2.3rem 0 1.2rem}
.stamp{display:inline-block;font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;border:1.5px solid var(--ink);padding:.15rem .5rem;margin:0 0 .8rem;background:var(--mustard);color:var(--ink)}
.lead{font-size:1.17rem;max-width:38em}
.asof{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
section{padding:1.8rem 0;border-top:1.5px dashed #b9bdc1}
.sec{font-family:var(--mono);font-size:.78rem;color:var(--mustard-d);letter-spacing:.06em;display:block;margin-bottom:.1rem}
.c{font-family:var(--mono);font-size:.74rem;white-space:nowrap;text-decoration:none;border-bottom:1px dotted currentColor}
.card{background:var(--card);border:1.5px solid var(--ink);padding:1rem 1.1rem .5rem}
.roads{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:.8rem}
.roads .card h3{display:flex;gap:.5rem;align-items:center}
.roads .card h3 i{font-style:normal;font-family:var(--mono);font-size:.75rem;background:var(--ink);color:var(--paper);padding:.05rem .4rem}
/* Map */
.fig{background:var(--card);border:1.5px solid var(--ink);padding:1rem;margin-top:.8rem}
.hint{font-family:var(--mono);font-size:.8rem;color:var(--muted);margin:0 0 .5rem}
.mapgrid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:1rem;align-items:start}
.fig svg{display:block;width:100%;height:auto}
.land{fill:#ece9df;stroke:var(--ink);stroke-width:1.6;stroke-linejoin:round}
.leader{stroke:var(--ink);stroke-width:1;stroke-dasharray:3 3}
.city{font-family:var(--mono);font-size:12px;fill:var(--muted)}
.hot{cursor:pointer}
.hot:focus{outline:none}
.hot .halo{fill:transparent;stroke:transparent;stroke-width:3}
.hot:hover .halo,.hot.lit .halo{stroke:var(--ink);fill:rgba(199,147,10,.22)}
.hot:focus-visible .halo{stroke:var(--ink);stroke-dasharray:4 3}
.mk-micro{fill:var(--mustard);stroke:var(--ink);stroke-width:1.5}
.mk-smr{fill:var(--steel);stroke:var(--ink);stroke-width:1.5}
.mk-mil{fill:var(--olive);stroke:var(--ink);stroke-width:1.5}
.num{font-family:var(--mono);font-size:13px;font-weight:700;text-anchor:middle;fill:var(--ink)}
.numbg{fill:var(--card);stroke:var(--ink);stroke-width:1.5}
.hot.lit .numbg{fill:var(--ink)}.hot.lit .num{fill:var(--paper)}
.legend{display:flex;flex-wrap:wrap;gap:.3rem 1rem;list-style:none;padding:0;margin:.6rem 0 0;font-family:var(--mono);font-size:.78rem}
.legend li{display:flex;align-items:center;gap:.35rem;margin:0}
.legend svg{width:14px;height:14px}
.chips{display:none;flex-wrap:wrap;gap:.35rem;list-style:none;padding:0;margin:0 0 .7rem}
.js .chips{display:flex}
.chips li{margin:0}
.chip{font-family:var(--mono);font-size:.78rem;min-height:38px;padding:.3rem .6rem;border:1.5px solid var(--ink);background:var(--paper);color:var(--ink);cursor:pointer;border-radius:0}
.chip[aria-expanded="true"]{background:var(--ink);color:var(--paper)}
.notes{list-style:none;padding:0;margin:0}
.note{border-left:4px solid var(--mustard);padding:.2rem 0 .2rem .8rem;margin:0 0 .9rem;font-size:.97rem}
.note.smr{border-left-color:var(--steel)}.note.mil{border-left-color:var(--olive)}
.note b{display:block;font-family:var(--head);font-size:1.05rem}
.kind{display:inline-block;font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;border:1px solid var(--ink);padding:0 .35rem;margin:.15rem 0 .35rem}
.note dl{display:grid;grid-template-columns:auto 1fr;gap:.1rem .6rem;margin:.2rem 0 .4rem;font-size:.92rem}
.note dt{font-family:var(--mono);font-size:.75rem;color:var(--muted);padding-top:.15rem}
.note dd{margin:0}
.js .note{display:none}.js .note.open{display:block}
.js .pick{display:block}.pick{display:none;font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.js .pick.gone{display:none}
@media (prefers-reduced-motion:no-preference){.hot .halo,.numbg,.num,.chip{transition:fill .15s,stroke .15s,background-color .15s,color .15s}.js .note.open{animation:in .2s ease}@keyframes in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}}
/* Timeline */
.tl{list-style:none;padding:0;margin:.8rem 0 0;border-left:2px solid var(--ink)}
.tl li{position:relative;padding:.1rem 0 .55rem 1.1rem;margin:0}
.tl li:before{content:"";position:absolute;left:-6px;top:.5rem;width:10px;height:10px;background:var(--ink)}
.tl li.ahead:before{background:var(--card);border:2px solid var(--ink);width:6px;height:6px}
.tl time,.tl .d{font-family:var(--mono);font-size:.82rem;font-weight:700;color:var(--mustard-d);display:inline-block;min-width:7.6rem}
/* Facts */
.facts{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;list-style:none;padding:0;margin:.8rem 0 0}
.facts li{background:var(--card);border:1.5px solid var(--ink);padding:.7rem .9rem;margin:0}
.facts b{display:block;font-family:var(--head);font-size:1.25rem;font-weight:600}
/* News */
.news{list-style:none;padding:0;margin:.8rem 0 0}
.news li{display:grid;grid-template-columns:7.5rem 1fr;gap:.8rem;padding:.6rem 0;border-bottom:1px solid var(--line);margin:0}
.news time{font-family:var(--mono);font-size:.82rem;font-weight:700}
/* FAQ */
details{background:var(--card);border:1.5px solid var(--ink);padding:.6rem .9rem;margin:0 0 .5rem}
summary{font-family:var(--head);font-weight:600;cursor:pointer;font-size:1.06rem}
details p{margin:.5rem 0 .2rem}
.related{background:var(--ink);color:var(--paper);padding:1rem 1.1rem;margin-top:1rem}
.related a{color:#f1c94b}
.related p{margin:0}
.sources{font-size:.9rem;padding-left:1.4rem}
.sources li{word-break:break-word}
.unconf{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.foot{border-top:2px solid var(--ink);background:var(--card);margin-top:2rem;padding:1.3rem 0 2rem;font-size:.88rem}
.foot p{margin:0 0 .35rem}
@media (max-width:760px){h1{font-size:1.95rem}.mapgrid,.roads,.facts{grid-template-columns:1fr}.news li{grid-template-columns:1fr;gap:.1rem}}

/* Further reading (Amazon affiliate) */
.reading{background:var(--card);border:1.5px solid var(--ink);padding:.9rem 1.1rem .5rem;margin:1.6rem 0 1.4rem}
.reading h2{font-size:1.2rem;margin-bottom:.4rem}
.reading ul{margin:0 0 .5rem;padding-left:1.1rem}
.reading li{margin-bottom:.35rem}
.reading .by{display:block;font-family:var(--mono);font-size:.76rem;color:var(--muted)}
.reading .aff{font-family:var(--mono);font-size:.74rem;color:var(--muted);margin:0 0 .4rem}