/* POCUS ATLAS — shares the Nightshift Reads washi palette so the two sites read as one family.
   Layout: a site bar on top (switch between sites), then a reading column with a sticky chapter TOC on wide screens. */
:root{
  --bg:#f4f0e6; --card:#fbf8f1; --line:#e4ddcd; --ink:#413c34; --dim:#8f8676;
  --acc:#5f76a0; --acc-ink:#2f3a52; --free:#6f8f63; --amber:#a97f3d; --warn:#b5603a;
  --img:#1d1b18; --chipbg:#efe8d7;
  --sans:"PingFang TC","Noto Sans TC","Noto Sans CJK TC",system-ui,sans-serif;
  --serif:"Noto Serif TC","Songti TC",serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:18.5px;line-height:1.75}
a{color:var(--acc)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
img,video,svg{max-width:100%}
.pad{padding-left:max(28px,env(safe-area-inset-left,0px));padding-right:max(28px,env(safe-area-inset-right,0px))}
@media (max-width:600px){.pad{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}}

/* ---------- site bar: shared by Nightshift Reads and ATLAS ---------- */
.sitebar{display:flex;align-items:center;gap:6px 18px;flex-wrap:wrap;padding-block:10px;border-bottom:1px solid var(--line);font-size:15.5px;background:var(--card)}
.sitebar .brand{font-weight:700;color:var(--ink);text-decoration:none;margin-right:auto;letter-spacing:.3px}
.sitebar nav{display:flex;gap:4px;flex-wrap:wrap}
.sitebar nav a{color:var(--dim);text-decoration:none;padding:4px 12px;border-radius:20px}
.sitebar nav a:hover{color:var(--acc-ink);background:var(--chipbg)}
.sitebar nav a[aria-current="page"]{color:var(--card);background:var(--acc)}

/* ---------- portal ---------- */
.hero{padding-block:36px 14px}
.eyebrow{font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--amber);text-transform:uppercase}
h1{font-family:var(--serif);font-size:clamp(32px,5vw,48px);line-height:1.3;margin:6px 0 10px;text-wrap:balance}
.lede{color:var(--dim);font-size:18.5px;max-width:80ch;margin:0}
.needs{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;padding-block:20px 8px}
.need{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;text-decoration:none;color:var(--ink)}
.need:hover{border-color:var(--acc)}
.need .q{font-size:15px;color:var(--amber);font-weight:700}
.need .t{font-size:22.5px;font-weight:700;font-family:var(--serif)}
.need .d{font-size:16px;color:var(--dim)}
.need .go{margin-top:auto;font-size:15.5px;color:var(--acc)}
.sec-h{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:34px 0 12px}
.sec-h h2{font-size:24px;color:var(--amber);border-left:4px solid var(--amber);padding-left:12px;margin:0}
.sec-h .n{color:var(--dim);font-size:15.5px}
.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:9px}
.chip{display:flex;flex-direction:column;gap:2px;background:var(--card);border:1px solid var(--line);border-radius:11px;padding:11px 14px;color:var(--ink);text-decoration:none;font-size:16px}
a.chip:hover{border-color:var(--acc)}
.chip .no{font-family:var(--mono);font-size:13.5px;color:var(--dim)}
.chip .nm{font-weight:600;line-height:1.45}
.chip .st{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--dim)}
.pill{font-size:13px;border-radius:6px;padding:0 7px;border:1px solid var(--line);white-space:nowrap}
.pill.live{color:var(--free);border-color:#6f8f6366;background:#eef3e8}
.pill.wip{color:var(--amber);border-color:#a97f3d55}
.chip.off{opacity:.62}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:14.5px;color:var(--dim);margin:-4px 0 12px}
footer{color:var(--dim);font-size:14.5px;padding-block:26px 40px;border-top:1px solid var(--line);margin-top:48px}
footer p{margin:4px 0;max-width:80ch}

/* ---------- chapter ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}
@media (min-width:1080px){.layout{grid-template-columns:220px minmax(0,1fr)}}
.toc{display:none}
@media (min-width:1080px){.toc{display:block;position:sticky;top:16px;align-self:start;font-size:15.5px;padding-top:40px}}
.toc ol{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc a{display:block;padding:4px 0 4px 14px;color:var(--dim);text-decoration:none;margin-left:-2px;border-left:2px solid transparent}
.toc a:hover,.toc a.on{color:var(--acc-ink);border-left-color:var(--acc)}
article{min-width:0;padding-block:28px 40px}
.crumb{font-size:15px;color:var(--dim)}
.crumb a{color:var(--dim)}
.meta-row{display:flex;gap:8px 18px;flex-wrap:wrap;font-size:15px;color:var(--dim);margin:6px 0 4px}
article h2{font-family:var(--serif);font-size:29px;line-height:1.35;margin:52px 0 12px;scroll-margin-top:16px;text-wrap:balance}
article h2 .n{font-family:var(--mono);font-size:16px;color:var(--amber);margin-right:10px;font-weight:500}
article h3{font-size:20.5px;margin:30px 0 8px}
article p,article li{max-width:80ch}
article ul,article ol{padding-left:1.3em}
.term{white-space:nowrap}
.en{color:var(--dim);font-size:.9em}
.key{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--acc);border-radius:10px;padding:14px 18px;margin:18px 0;max-width:1100px}
.key.warn{border-left-color:var(--warn)}
.key b:first-child{color:var(--acc-ink)}
.key.warn b:first-child{color:var(--warn)}
figure{margin:22px 0;max-width:1100px}
figure .frame{background:var(--img);border-radius:12px;overflow:hidden;position:relative}
figure .frame.light{background:var(--card);border:1px solid var(--line)}
figure img,figure video{display:block;width:100%;height:auto}
figcaption{font-size:15.5px;color:var(--dim);margin-top:8px;line-height:1.6}
.grid2{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;max-width:1100px}
.grid2 figure{margin:0}
.tbl{overflow-x:auto;margin:16px 0;max-width:1100px}
table{border-collapse:collapse;width:100%;font-size:16.5px;background:var(--card)}
th,td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
th{background:var(--chipbg);font-weight:600}
td.num{font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding-left:44px;margin:12px 0}
.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--acc);color:var(--card);font-family:var(--mono);font-size:16px;display:grid;place-items:center}
.legend-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:2px 20px;font-size:16px;padding:0;list-style:none;max-width:1100px}
.legend-list b{display:inline-block;min-width:26px;font-family:var(--mono);color:var(--amber)}

/* TI-RADS calculator */
.calc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;max-width:1100px;margin:18px 0}
.calc fieldset{border:0;padding:0;margin:0 0 14px}
.calc legend{font-weight:700;margin-bottom:6px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts label{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:9px;padding:6px 12px;font-size:16px;cursor:pointer;background:var(--bg)}
.opts label:has(input:checked){border-color:var(--acc);background:#e7ebf3;color:var(--acc-ink)}
.opts input{accent-color:var(--acc)}
.opts .pt{font-family:var(--mono);color:var(--dim);font-size:14px}
.calc .size{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.calc input[type=number]{width:110px;font:inherit;padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
.result{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;align-items:baseline;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}
.result .big{font-family:var(--mono);font-size:32.5px;font-weight:500;color:var(--acc-ink)}
.result .rec{font-size:18px}
.note{font-size:14.5px;color:var(--dim)}

/* quiz */
.quiz{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:18px 0;max-width:1100px}
.quiz details{margin-top:10px}
.quiz summary{cursor:pointer;color:var(--acc);font-weight:600}
.refs{font-size:16px}
.refs li{margin:6px 0}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;max-width:1100px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* feature gallery */
.gal-h{font-size:17.5px;font-weight:700;color:var(--acc-ink);margin:22px 0 8px}
.gal{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;max-width:1100px}
.gal-wide{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.gal figure{margin:0;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.gal .frame{border-radius:0;aspect-ratio:4/3;display:grid;place-items:center}
.gal .frame img{width:100%;height:100%;object-fit:contain}
.gal figcaption{margin:0;padding:10px 12px 12px;font-size:15px;color:var(--ink)}
.gal figcaption b{display:block;font-size:16.5px}
.gal .pts{font-family:var(--mono);color:var(--amber);font-weight:500}
.gal .src{display:block;color:var(--dim);font-size:13.5px;margin-top:4px}
.quiz .qimg{background:var(--img);border-radius:10px;overflow:hidden;max-width:520px;margin:10px 0}
.quiz .qimg img{display:block;width:100%;height:auto}
.credits{font-size:15px;color:var(--dim)}
.credits li{margin:4px 0}

/* wide screens: put related blocks side by side instead of leaving the right side empty */
.duo{display:grid;gap:8px 44px;align-items:start;max-width:1100px}
.duo>.col{min-width:0}
.duo>.col>:first-child{margin-top:0}
.duo figure,.duo .tbl,.duo .calc,.duo .key,.duo .grid2{max-width:none}
.quizzes{display:grid;gap:0 18px;max-width:1100px}
@media (min-width:1400px){
  .duo{grid-template-columns:minmax(0,1fr) minmax(0,1fr);max-width:1760px;margin:18px 0}
  .quizzes{grid-template-columns:repeat(2,minmax(0,1fr));max-width:1760px}
  .gal,.grid2,.legend-list,.related{max-width:1760px}
  .legend-list{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
  .gal{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
  .gal-wide{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
  .grid2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
  article > .key, article > .tbl{max-width:1760px}
}

/* reference and credit lists: not running prose, so no line-length cap; two columns on wide screens */
article .refs li,article .credits li{max-width:none}
.refs,.credits{max-width:1760px;padding-left:1.4em}
.refs li,.credits li{break-inside:avoid;margin:0 0 8px}
@media (min-width:1400px){.refs,.credits{column-count:2;column-gap:56px}}

/* about page */
.about-head{padding-block:36px 8px}
.about-head .en{font-family:var(--sans);font-size:.5em;color:var(--dim);font-weight:400;margin-left:8px}
.about-head .links a{font-family:var(--mono);font-size:15px}
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:18px;margin:18px 0 8px}
.about-grid section{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px 22px 14px}
.about-grid h2{font-family:var(--serif);font-size:21.5px;color:var(--amber);margin:16px 0 6px}
.about-grid ul{padding-left:1.2em;margin:0}
.about-grid li{margin:3px 0}
.pub-tools{display:flex;gap:12px 18px;flex-wrap:wrap;align-items:center;margin:4px 0 6px}
.pub-tools input{flex:1 1 280px;max-width:520px;font:inherit;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:9px 13px;color:var(--ink)}
.pub-tools .years{display:flex;gap:6px;flex-wrap:wrap}
.pub-tools .years a{font-family:var(--mono);font-size:14.5px;text-decoration:none;color:var(--dim);border:1px solid var(--line);border-radius:20px;padding:2px 12px;background:var(--card)}
.pub-tools .years a:hover{color:var(--acc-ink);border-color:var(--acc)}
.pub-year h3{font-family:var(--serif);font-size:22px;margin:26px 0 8px;scroll-margin-top:16px}
.pub-year h3 .n{font-family:var(--sans);font-size:15px;color:var(--dim);font-weight:400;margin-left:8px}
.about .refs{max-width:1760px;padding-left:1.6em}
.about .refs li{margin:0 0 10px;line-height:1.65}
@media (min-width:1400px){.about .refs{column-count:2;column-gap:56px}}

/* CJK line breaking: break at punctuation and spaces, not inside words */
h1,h2,h3,.lede,.role,.need .d,.about-grid li,figcaption,.key,.chip .nm{word-break:keep-all;overflow-wrap:anywhere;line-break:strict}
.about-head .role{font-size:19.5px;font-weight:600;color:var(--ink);margin:0 0 6px;line-height:1.6}
.about-head .role .sep{color:var(--line);margin:0 10px}
.about-grid ul.posts{list-style:none;padding-left:0}
.about-grid ul.posts li{margin:0 0 10px;padding-left:14px;border-left:3px solid var(--line);line-height:1.5}
.about-grid ul.posts li b{display:block;font-weight:600;color:var(--ink)}
.about-grid ul.posts li .org{display:block;font-size:15px;color:var(--dim)}

footer p{max-width:none;word-break:keep-all;overflow-wrap:anywhere;line-break:strict}

/* keep tall composite figures from stretching a column */
.duo figure .frame img{max-height:620px;width:100%;object-fit:contain}

/* uniform image grid: equal frames regardless of each image's own shape */
.uni{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:1100px;margin:16px 0}
@media (min-width:1400px){article > .uni{grid-template-columns:repeat(4,minmax(0,1fr));max-width:1760px}}
@media (max-width:560px){.uni{grid-template-columns:minmax(0,1fr)}}
.duo .uni{max-width:none;margin:0}
.uni figure{margin:0;max-width:none}
.uni .frame{aspect-ratio:4/3;display:grid;place-items:center}
.uni .frame img{width:100%;height:100%;object-fit:contain;max-height:none}
.uni figcaption{margin-top:6px}
.uni figcaption b{display:block;color:var(--ink)}
.uni .src{display:block;color:var(--dim);font-size:13.5px;margin-top:2px}
.uni .pts{font-family:var(--mono);color:var(--amber);font-weight:500}
.uni figcaption{font-size:15px;color:var(--ink);line-height:1.55}