/* ==========================================================================
   Line Monkey MD · design system v1 (Milestone 1)
   Layout concept: a lightbox. Writing sits on bright film-white paper,
   every essay is filed with an annotated plate, and the dark theme is the
   reading room radiologists actually work in.
   ========================================================================== */

:root{
  /* paper and ink */
  --paper:#F1F0EB;          /* lightbox white, a touch of warmth */
  --paper-2:#E6E4DD;        /* film sleeve */
  --card:#F8F7F3;
  --ink:#111920;            /* film-base blue black */
  --ink-2:#36414A;
  --muted:#636D76;
  --rule:#D1D0C8;
  --rule-strong:#111920;
  --contrast:#8C1D2A;       /* contrast red: links, catheter, the one accent */
  --on-ink:#F1F0EB;         /* text on an ink band */
  --band:#111920;           /* Start Here band */
  --band-ink:#E9E7E0;
  --band-muted:#9AA3AA;
  --field:#FFFFFF;

  /* topics: hub colors borrowed from introducer sheaths, 4 to 8 Fr */
  --t-clinical:#B5342D;     /* 4 Fr red */
  --t-careers:#7A838A;      /* 5 Fr gray */
  --t-practice:#2D7A50;     /* 6 Fr green */
  --t-money:#C9661C;        /* 7 Fr orange */
  --t-identity:#2B5FA3;     /* 8 Fr blue */

  /* plate grounds (light tints of the hubs) and plate ink */
  --plate-clinical:#E5CFCB;
  --plate-careers:#D4D7D8;
  --plate-practice:#CBDACE;
  --plate-money:#EAD6C1;
  --plate-identity:#C9D4E3;
  --plate-vessel:#111920;
  --plate-grid:rgba(17,25,32,.14);
  --catheter:#8C1D2A;

  /* type */
  --serif:'Literata','Iowan Old Style','Charter',Georgia,serif;
  --sans:'Archivo','Helvetica Neue',Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;

  /* scale (1.25 minor third, body 19px on desktop) */
  --fs-xs:12px; --fs-sm:14px; --fs-base:17px; --fs-read:19px;
  --fs-h4:22px; --fs-h3:clamp(22px,2.2vw,27px); --fs-h2:clamp(28px,3.4vw,40px);
  --fs-h1:clamp(38px,5.6vw,68px); --fs-display:clamp(46px,9vw,112px);

  /* space */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:72px; --s9:112px;
  --gutter:clamp(16px,4vw,40px);
  --max:1260px;
  --measure:40rem;          /* ~68 characters of Literata at 19px */
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0D1215; --paper-2:#141B20; --card:#11181C;
    --ink:#E6E3DC; --ink-2:#B9BEC0; --muted:#8D969C; --rule:#26313A; --rule-strong:#E6E3DC;
    --contrast:#E87580; --on-ink:#0D1215; --band:#151D22; --band-ink:#E6E3DC; --band-muted:#8D969C; --field:#0A0E11;
    --t-clinical:#E2665D; --t-careers:#9AA3AA; --t-practice:#53B07D; --t-money:#EE8D46; --t-identity:#6194DB;
    --plate-clinical:#1D1416; --plate-careers:#15191C; --plate-practice:#111A15; --plate-money:#1D1711; --plate-identity:#111723;
    --plate-vessel:#DCE3E6; --plate-grid:rgba(220,227,230,.13); --catheter:#F0707B;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0D1215; --paper-2:#141B20; --card:#11181C;
  --ink:#E6E3DC; --ink-2:#B9BEC0; --muted:#8D969C; --rule:#26313A; --rule-strong:#E6E3DC;
  --contrast:#E87580; --on-ink:#0D1215; --band:#151D22; --band-ink:#E6E3DC; --band-muted:#8D969C; --field:#0A0E11;
  --t-clinical:#E2665D; --t-careers:#9AA3AA; --t-practice:#53B07D; --t-money:#EE8D46; --t-identity:#6194DB;
  --plate-clinical:#1D1416; --plate-careers:#15191C; --plate-practice:#111A15; --plate-money:#1D1711; --plate-identity:#111723;
  --plate-vessel:#DCE3E6; --plate-grid:rgba(220,227,230,.13); --catheter:#F0707B;
  color-scheme:dark;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:var(--fs-base);line-height:1.6;font-optical-sizing:auto;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;transition:background-color .35s ease,color .35s ease}
a{color:inherit;text-decoration:none}
img,canvas,svg{display:block;max-width:100%}
h1,h2,h3,h4{margin:0;font-weight:500;letter-spacing:-.018em;line-height:1.08;text-wrap:balance}
p{margin:0;text-wrap:pretty}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--contrast);outline-offset:3px}
::selection{background:color-mix(in oklab,var(--contrast) 28%,transparent)}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--ink);color:var(--paper);padding:8px 12px;font-family:var(--sans)}
.skip:focus{left:8px}

/* ---------- type roles ---------- */
.label{font-family:var(--sans);font-stretch:75%;font-weight:600;font-size:var(--fs-xs);letter-spacing:.09em;text-transform:uppercase}
.label.red{color:var(--contrast)}
.mono{font-family:var(--mono);font-size:11.5px;letter-spacing:.02em}
.meta{font-family:var(--sans);font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.meta .sep{margin-inline:.5em;opacity:.45}
.dek{font-size:clamp(17px,1.6vw,20px);line-height:1.5;color:var(--ink-2)}
.u{background-image:linear-gradient(currentColor,currentColor);background-size:0 1px;background-position:0 94%;background-repeat:no-repeat;transition:background-size .3s ease}
a:hover .u,a.u:hover{background-size:100% 1px}
.more{font-family:var(--sans);font-size:14px;font-weight:600;color:var(--contrast);display:inline-flex;gap:.4em;align-items:center;white-space:nowrap}
.more i{font-style:normal;transition:transform .2s ease}
.more:hover i{transform:translateX(3px)}

/* section head: a rule with a filing label, like a film sleeve tab */
.shead{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 16px;border-top:1.5px solid var(--rule-strong);padding-top:12px;margin-bottom:var(--s6)}
.shead h2{font-family:var(--sans);font-stretch:75%;font-weight:700;font-size:13px;letter-spacing:.1em;text-transform:uppercase}
.shead p{font-family:var(--sans);font-size:14px;color:var(--muted)}

/* ---------- topic chip: a sheath hub ---------- */
.hub{display:inline-flex;align-items:center;gap:7px;font-family:var(--sans);font-stretch:75%;font-weight:600;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);white-space:nowrap}
.hub::before{content:"";width:9px;height:14px;border-radius:2px 2px 4px 4px;background:var(--hub,var(--t-careers));box-shadow:inset 0 -3px 0 rgba(0,0,0,.18)}
[data-topic="clinical"]{--hub:var(--t-clinical)}
[data-topic="careers"]{--hub:var(--t-careers)}
[data-topic="practice"]{--hub:var(--t-practice)}
[data-topic="money"]{--hub:var(--t-money)}
[data-topic="identity"]{--hub:var(--t-identity)}

/* ---------- buttons and fields ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border:1.5px solid var(--ink);border-radius:2px;background:var(--ink);color:var(--paper);font-family:var(--sans);font-size:14px;font-weight:600;letter-spacing:.01em;cursor:pointer;transition:background-color .2s ease,border-color .2s ease,color .2s ease;white-space:nowrap}
.btn:hover{background:var(--contrast);border-color:var(--contrast);color:#fff}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn.sm{min-height:36px;padding:0 12px;font-size:13px}
.field{display:flex;flex-wrap:wrap;gap:8px}
.field input{flex:1 1 220px;min-width:0;min-height:44px;padding:0 14px;border:1.5px solid var(--ink);border-radius:2px;background:var(--field);color:var(--ink);font-family:var(--sans);font-size:15px}
.field input::placeholder{color:var(--muted)}
.field input:focus{outline:2px solid var(--contrast);outline-offset:1px}
.note-ok{font-family:var(--sans);font-size:13px;color:var(--muted);margin-top:8px;min-height:1.2em}

/* ---------- plates ---------- */
.plate{position:relative;overflow:hidden;background:var(--plate-careers);isolation:isolate;max-width:100%;container-type:inline-size}
@container (max-width:420px){.plate .ann .tr,.plate .ann .bl{display:none}.plate .ann span{max-width:88%}}
@container (max-width:200px){.plate .ann{display:none}}
.plate[data-topic="clinical"]{background:var(--plate-clinical)}
.plate[data-topic="practice"]{background:var(--plate-practice)}
.plate[data-topic="money"]{background:var(--plate-money)}
.plate[data-topic="identity"]{background:var(--plate-identity)}
.plate canvas{position:absolute;inset:0;width:100%;height:100%}
.plate .ann{position:absolute;inset:0;pointer-events:none;font-family:var(--mono);font-size:10px;line-height:1.3;letter-spacing:.06em;text-transform:uppercase;color:var(--plate-vessel);opacity:.78}
.plate .ann span{position:absolute;max-width:46%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.plate .ann .tl{top:10px;left:12px}.plate .ann .tr{top:10px;right:12px;text-align:right}
.plate .ann .bl{bottom:9px;left:12px}.plate .ann .br{bottom:9px;right:12px;text-align:right}
.plate.small .ann{display:none}
.plate.bare .ann{display:none}
a .plate canvas{transition:transform .7s cubic-bezier(.2,.7,.2,1)}
a:hover .plate canvas{transform:scale(1.025)}
/* corner ticks, like the edge of a detector */
.plate::after{content:"";position:absolute;inset:6px;pointer-events:none;z-index:1;
  background:
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) left top/10px 1px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) left top/1px 10px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) right top/10px 1px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) right top/1px 10px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) left bottom/10px 1px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) left bottom/1px 10px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) right bottom/10px 1px no-repeat,
    linear-gradient(var(--plate-vessel),var(--plate-vessel)) right bottom/1px 10px no-repeat;opacity:.45}
.plate.small::after{inset:4px;opacity:.35}

/* ---------- review bar (Milestone 1 only, removed at build) ---------- */
.review{background:#8C1D2A;color:#fff;font-family:var(--sans);font-size:13px}
.review .wrap{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between;align-items:center;padding-block:8px}
.review a{text-decoration:underline;text-underline-offset:3px}
.review b{font-weight:600}

/* ---------- masthead ---------- */
.util{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-block:14px}
.util .who{font-family:var(--sans);font-stretch:80%;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.util .who .hide-sm{display:none}
@media (min-width:820px){.util .who .hide-sm{display:inline}}
.util .acts{display:flex;align-items:center;gap:8px}
.iconbtn{display:inline-flex;align-items:center;gap:8px;min-height:36px;padding:0 10px;border:1px solid var(--rule);border-radius:2px;background:transparent;cursor:pointer;font-family:var(--sans);font-size:13px;color:var(--ink-2);transition:border-color .2s ease,color .2s ease}
.iconbtn:hover{border-color:var(--ink);color:var(--ink)}
.iconbtn svg{width:16px;height:16px}
.iconbtn kbd{font-family:var(--mono);font-size:10.5px;padding:1px 5px;border:1px solid var(--rule);border-radius:2px;color:var(--muted)}
.iconbtn .txt{display:none}
@media (min-width:640px){.iconbtn .txt{display:inline}}

.brand{display:grid;justify-items:center;text-align:center;padding-block:clamp(14px,3vw,34px) clamp(18px,3vw,30px)}
.wordmark{display:inline-flex;align-items:flex-start;gap:.12em;font-family:var(--serif);font-weight:560;font-size:var(--fs-display);line-height:.9;letter-spacing:-.04em;font-variation-settings:"opsz" 72;color:var(--ink)}
.wordmark .md{font-family:var(--sans);font-stretch:75%;font-weight:700;font-size:.2em;letter-spacing:.08em;line-height:1;color:var(--contrast);border:.09em solid currentColor;padding:.18em .22em .14em;margin-top:.5em}
.wire{width:min(620px,86%);height:22px;margin-top:14px;color:var(--contrast)}
.tagline{margin-top:10px;font-style:italic;font-size:clamp(17px,2vw,21px);color:var(--ink-2)}
.nav{border-block:1.5px solid var(--rule-strong)}
.nav ul{display:flex;justify-content:safe center;gap:clamp(16px,3.6vw,44px);overflow-x:auto;scrollbar-width:none;padding-inline:4px}
.nav ul::-webkit-scrollbar{display:none}
.nav a{display:block;padding-block:13px;font-family:var(--sans);font-stretch:75%;font-weight:600;font-size:13px;letter-spacing:.1em;text-transform:uppercase;white-space:nowrap;color:var(--ink-2);border-bottom:2px solid transparent;margin-bottom:-1.5px}
.nav a:hover{color:var(--ink);border-color:var(--contrast)}
.nav a[aria-current="page"]{color:var(--ink);border-color:var(--ink)}

/* ---------- lead story ---------- */
.lead{margin-top:var(--s6);display:grid;gap:0}
.lead .plate{aspect-ratio:16/9;min-height:300px}
.lead .cap{background:var(--card);border:1px solid var(--rule);border-top:0;padding:clamp(20px,3vw,40px)}
.lead h1{margin-block:12px 14px;font-size:var(--fs-h1);font-variation-settings:"opsz" 72;line-height:1.02}
.lead .row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:20px;padding-top:14px;border-top:1px solid var(--rule)}
@media (min-width:980px){
  .lead{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:stretch}
  .lead .plate{aspect-ratio:auto;min-height:540px}
  .lead .cap{border-top:1px solid var(--rule);border-left:0;display:flex;flex-direction:column;justify-content:flex-end}
}

/* ---------- signup strip ---------- */
.strip{margin-top:var(--s7);border-block:1px solid var(--rule)}
.strip .wrap,.strip-in{display:grid;gap:16px;padding-block:22px;align-items:center}
@media (min-width:900px){.strip-in{grid-template-columns:minmax(0,1fr) minmax(0,480px);gap:32px}}
.strip h2{font-size:24px;letter-spacing:-.01em}
.strip p{font-family:var(--sans);font-size:14px;color:var(--muted);margin-top:4px}

/* ---------- latest ---------- */
.sec{padding-top:var(--s8)}
.latest{display:grid;gap:40px}
@media (min-width:1000px){
  .latest{grid-template-columns:minmax(0,3fr) minmax(0,5fr) minmax(0,3fr);gap:0}
  .latest>*{padding-inline:28px;min-width:0}
  .latest>:first-child{padding-left:0;border-right:1px solid var(--rule)}
  .latest>:last-child{padding-right:0;border-left:1px solid var(--rule)}
}
.card{display:grid;gap:12px;min-width:0}
.card .plate{aspect-ratio:4/3}
.card h3{font-size:var(--fs-h3);line-height:1.14}
.card .x{font-size:16px;line-height:1.55;color:var(--ink-2)}
.card.big .plate{aspect-ratio:5/4}
.card.big h3{font-size:clamp(28px,3vw,40px);line-height:1.06}
.card.big{text-align:left}
.stack{display:grid;gap:28px}
.stack .card+.card{padding-top:28px;border-top:1px solid var(--rule)}
.mini{display:grid;grid-template-columns:72px minmax(0,1fr);gap:14px;align-items:start;padding-block:14px;border-bottom:1px solid var(--rule)}
.mini:first-of-type{padding-top:0}
.mini .plate{aspect-ratio:1}
.mini h4{font-size:17px;line-height:1.25;letter-spacing:-.005em}
.mini .meta{margin-top:5px;font-size:12.5px}

/* ---------- start here band ---------- */
.band{background:var(--band);color:var(--band-ink);margin-top:var(--s9);padding-block:var(--s8)}
.band .label{color:var(--band-muted)}
.band .label.red{color:color-mix(in oklab,var(--contrast) 70%,var(--band-ink))}
.band-head{display:grid;gap:18px;margin-bottom:var(--s7)}
@media (min-width:900px){.band-head{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:48px;align-items:end}}
.band h2{font-size:clamp(34px,5vw,60px);line-height:1.02;font-variation-settings:"opsz" 72}
.band .intro{font-size:18px;line-height:1.55;color:var(--band-muted)}
.path{display:grid;gap:28px;counter-reset:step}
@media (min-width:640px){.path{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1100px){.path{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step{display:grid;gap:12px;min-width:0;align-content:start}
.step .plate{aspect-ratio:3/4}
.step .n{display:flex;justify-content:space-between;align-items:baseline;border-top:1px solid color-mix(in oklab,var(--band-ink) 30%,transparent);padding-top:10px}
.step h3{font-size:22px;line-height:1.18}
.step p{font-size:15.5px;line-height:1.5;color:var(--band-muted)}
.path-line{height:22px;margin-bottom:22px;color:var(--contrast);display:none}
@media (min-width:1100px){.path-line{display:block}}

/* ---------- topics ---------- */
.topics{display:grid;gap:16px}
@media (min-width:700px){.topics{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1100px){.topics{grid-template-columns:repeat(5,minmax(0,1fr))}}
.topic{display:grid;grid-template-rows:auto auto 1fr auto;border:1px solid var(--rule);background:var(--card);min-width:0}
.topic .plate{aspect-ratio:16/10}
.topic .body{padding:18px 18px 8px;display:grid;gap:8px;align-content:start}
.topic h3{font-size:23px;line-height:1.12}
.topic .count{font-family:var(--mono);font-size:11px;color:var(--muted)}
.topic .desc{font-family:var(--sans);font-size:14px;line-height:1.5;color:var(--muted)}
.topic ul{padding:4px 18px 0}
.topic li a{display:block;padding-block:10px;border-top:1px solid var(--rule);font-size:16px;line-height:1.3}
.topic .tfoot{padding:12px 18px 18px}
.topic .hub-bar{height:5px;background:var(--hub)}

/* ---------- series ---------- */
.series{display:grid;gap:0;border-top:1px solid var(--rule)}
@media (min-width:800px){.series{grid-template-columns:repeat(4,minmax(0,1fr))}}
.ser{padding:20px 20px 22px 0;border-bottom:1px solid var(--rule);display:grid;gap:8px;align-content:start;min-width:0}
@media (min-width:800px){.ser{padding:22px 24px;border-bottom:0;border-right:1px solid var(--rule)}.ser:first-child{padding-left:0}.ser:last-child{border-right:0}}
.ser h3{font-size:22px}
.ser p{font-family:var(--sans);font-size:14px;color:var(--muted);line-height:1.5}
.ser .ct{font-family:var(--mono);font-size:11px;color:var(--contrast)}

/* ---------- discussed + podcasts ---------- */
.two{display:grid;gap:var(--s7)}
@media (min-width:980px){.two{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:56px}}
.rank li a{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:14px;align-items:baseline;padding-block:14px;border-bottom:1px solid var(--rule)}
.rank .k{font-family:var(--serif);font-size:30px;line-height:1;color:var(--contrast);font-variation-settings:"opsz" 72}
.rank h4{font-size:18.5px;line-height:1.25}
.rank .c{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.media{border:1px solid var(--rule);background:var(--card);padding:22px}
.media h3{font-size:24px;margin-block:8px 6px}
.media .sub{font-family:var(--sans);font-size:14px;color:var(--muted)}
.media li a{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;padding-block:12px;border-top:1px solid var(--rule);font-size:16px;line-height:1.35}
.media li:first-child a{border-top:0}
.media .ep{font-family:var(--mono);font-size:11.5px;color:var(--contrast);padding-top:3px}
.trace{height:34px;margin-block:12px 6px;color:var(--contrast)}
.cred{margin-top:16px;padding-top:14px;border-top:1px solid var(--rule);font-family:var(--sans);font-size:14px;color:var(--ink-2)}

/* ---------- about strip ---------- */
.about{display:grid;gap:28px;border-block:1.5px solid var(--rule-strong);padding-block:40px}
@media (min-width:900px){.about{grid-template-columns:220px minmax(0,1fr) 300px;gap:44px;align-items:center}}
.portrait{aspect-ratio:4/5;max-width:220px;background:var(--paper-2);border:1px dashed var(--muted);display:grid;place-items:center;text-align:center;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:12px}
.about h2{font-size:var(--fs-h2);margin-block:10px 14px}
.about .bio{font-size:18px;line-height:1.6;color:var(--ink-2)}
.tl{display:grid;gap:0;font-family:var(--sans);font-size:14px}
.tl li{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;padding-block:9px;border-bottom:1px solid var(--rule)}
.tl b{font-family:var(--mono);font-weight:500;font-size:12px;color:var(--contrast);padding-top:2px}

/* ---------- archive ---------- */
.arch{display:grid;gap:40px}
@media (min-width:980px){.arch{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:56px}}
.years{display:flex;align-items:flex-end;gap:clamp(6px,1.6vw,18px);overflow-x:auto;padding-bottom:6px}
.yr{display:grid;justify-items:center;gap:8px;background:none;border:0;padding:6px 2px;cursor:pointer;color:var(--ink-2);min-width:42px}
.yr .bars{display:flex;align-items:flex-end;height:72px}
.yr .bars i{width:22px;background:currentColor;opacity:.8;border-radius:1px 1px 0 0}
.yr .y{font-family:var(--serif);font-size:20px;font-variant-numeric:tabular-nums}
.yr .ct{font-family:var(--mono);font-size:10.5px;color:var(--muted)}
.yr[aria-pressed="true"]{color:var(--contrast)}
.yr:hover{color:var(--ink)}
.alist{margin-top:18px;max-height:420px;overflow:auto;border-top:1px solid var(--rule)}
.alist li a{display:grid;grid-template-columns:62px minmax(0,1fr) auto;gap:12px;align-items:baseline;padding-block:10px;border-bottom:1px solid var(--rule);font-size:16px;line-height:1.3}
.alist .dt{font-family:var(--mono);font-size:11px;color:var(--muted)}
.alist .hub{font-size:10.5px}
.alist .hub span{display:none}
@media (min-width:600px){.alist .hub span{display:inline}}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 12px;border:1px solid var(--rule);border-radius:999px;background:transparent;cursor:pointer;font-family:var(--sans);font-size:13px;color:var(--ink-2)}
.chip:hover,.chip[aria-pressed="true"]{border-color:var(--ink);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--paper)}

/* ---------- newsletter ---------- */
.nl{display:grid;border:1.5px solid var(--rule-strong);background:var(--card)}
@media (min-width:900px){.nl{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr)}}
.nl .plate{min-height:260px}
.nl .body{padding:clamp(24px,4vw,52px);display:grid;gap:14px;align-content:center}
.nl h2{font-size:clamp(32px,4vw,52px);line-height:1.02}
.nl .fine{font-family:var(--sans);font-size:13px;color:var(--muted)}

/* ---------- footer ---------- */
.foot{margin-top:var(--s9);background:var(--band);color:var(--band-ink);padding-block:56px 28px}
.foot .grid{display:grid;gap:36px}
@media (min-width:860px){.foot .grid{grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr))}}
.foot .wordmark{font-size:44px;color:var(--band-ink)}
.foot .wordmark .md{font-size:.3em;margin-top:.3em}
.foot p{color:var(--band-muted);margin-top:12px;font-size:15.5px;line-height:1.55;max-width:34ch}
.foot h4{font-family:var(--sans);font-stretch:75%;font-weight:700;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--band-muted);margin-bottom:12px}
.foot li a{display:inline-block;padding-block:5px;font-family:var(--sans);font-size:15px}
.foot li a:hover{color:color-mix(in oklab,var(--contrast) 60%,var(--band-ink))}
.foot .base{margin-top:40px;padding-top:16px;border-top:1px solid color-mix(in oklab,var(--band-ink) 18%,transparent);display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-family:var(--mono);font-size:11px;color:var(--band-muted)}

/* ---------- catheter rail: scroll position + section map ---------- */
.topprog{position:fixed;left:0;right:0;top:0;height:3px;z-index:60;pointer-events:none}
.topprog i{display:block;height:100%;width:0;background:var(--contrast)}
.rail{position:fixed;left:max(10px,calc((100vw - var(--max)) / 2 - 64px));top:18vh;bottom:18vh;width:44px;z-index:40;display:none}
@media (min-width:1400px){.rail{display:block}.topprog{display:none}}
.rail .track{position:absolute;left:12px;top:0;bottom:0;width:1px;background:var(--rule)}
.rail .fill{position:absolute;left:11px;top:0;width:3px;height:0;background:var(--contrast);border-radius:2px}
.rail .tip{position:absolute;left:4px;width:18px;height:22px;color:var(--contrast);transform:translateY(-2px)}
.rail ol{position:absolute;inset:0}
.rail li{position:absolute;left:0;transform:translateY(-50%)}
.rail li a{display:flex;align-items:center;gap:10px}
.rail li i{width:9px;height:9px;margin-left:8px;border-radius:50%;border:1.5px solid var(--muted);background:var(--paper);transition:border-color .2s ease,background-color .2s ease}
.rail li span{font-family:var(--sans);font-stretch:75%;font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);opacity:0;transform:translateX(-4px);transition:opacity .2s ease,transform .2s ease;white-space:nowrap;background:var(--paper);padding:2px 6px}
.rail li a:hover span,.rail li.on span{opacity:1;transform:none}
.rail li.on i,.rail li.past i{border-color:var(--contrast);background:var(--contrast)}

/* ---------- command palette ---------- */
.pal{position:fixed;inset:0;z-index:120;display:grid;place-items:start center;padding:12vh 16px 16px;background:color-mix(in oklab,var(--ink) 40%,transparent);backdrop-filter:blur(3px)}
.pal-box{width:min(640px,100%);background:var(--card);border:1.5px solid var(--rule-strong);box-shadow:0 24px 60px rgba(0,0,0,.25)}
.pal input{width:100%;border:0;border-bottom:1px solid var(--rule);background:transparent;padding:18px 20px;font-family:var(--serif);font-size:20px;color:var(--ink)}
.pal input:focus{outline:none}
.pal ul{max-height:52vh;overflow:auto}
.pal li a{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:baseline;padding:11px 20px;border-bottom:1px solid var(--rule);font-size:16px;line-height:1.3}
.pal li a[aria-selected="true"]{background:var(--paper-2)}
.pal .hint{display:flex;justify-content:space-between;padding:10px 20px;font-family:var(--mono);font-size:11px;color:var(--muted)}

/* ==========================================================================
   Reading page
   ========================================================================== */
.rhead{max-width:860px;margin-inline:auto;text-align:center;padding-top:clamp(28px,5vw,64px)}
.rhead h1{font-size:var(--fs-h1);font-variation-settings:"opsz" 72;margin-block:16px 18px;line-height:1.03}
.rhead .dek{max-width:40rem;margin-inline:auto;font-style:italic}
.byline{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 14px;margin-top:22px;font-family:var(--sans);font-size:14px;color:var(--muted)}
.byline .av{width:34px;height:34px;border-radius:50%;background:var(--paper-2);border:1px solid var(--rule);display:grid;place-items:center;font-family:var(--sans);font-stretch:75%;font-weight:700;font-size:12px;color:var(--ink)}
.byline b{color:var(--ink);font-weight:600}
.hero-plate{margin-top:clamp(28px,4vw,48px)}
.hero-plate .plate{aspect-ratio:21/9;min-height:240px}
.hero-plate figcaption{margin-top:8px;font-family:var(--mono);font-size:11px;color:var(--muted)}

.rgrid{display:grid;gap:32px;margin-top:clamp(32px,5vw,64px)}
@media (min-width:1180px){.rgrid{grid-template-columns:220px minmax(0,var(--measure)) 240px;justify-content:center;gap:56px}}
.toc{display:none}
@media (min-width:1180px){.toc{display:block;position:sticky;top:28px;align-self:start;max-height:calc(100vh - 56px);overflow:auto}}
.toc .label{display:block;margin-bottom:12px;color:var(--muted)}
.toc ol{border-left:1px solid var(--rule)}
.toc li a{display:block;padding:7px 0 7px 14px;margin-left:-1px;border-left:2px solid transparent;font-family:var(--sans);font-size:13.5px;line-height:1.35;color:var(--muted)}
.toc li a:hover{color:var(--ink)}
.toc li a.on{color:var(--ink);border-color:var(--contrast)}
.toc .time{margin-top:18px;font-family:var(--mono);font-size:11px;color:var(--muted)}

.prose{font-size:var(--fs-read);line-height:1.68;max-width:var(--measure);margin-inline:auto;width:100%;min-width:0}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(25px,2.6vw,31px);line-height:1.15;margin-top:2em;scroll-margin-top:24px}
.prose h2+p{margin-top:.7em}
.prose a{color:var(--contrast);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose ul{padding-left:1.1em;list-style:none}
.prose ul li{position:relative;padding-left:.4em}
.prose ul li+li{margin-top:.45em}
.prose ul li::before{content:"";position:absolute;left:-.9em;top:.78em;width:.55em;height:2px;background:var(--contrast)}
.prose .first::first-letter{float:left;font-size:4.1em;line-height:.82;padding:.06em .1em 0 0;font-weight:500;color:var(--contrast);font-variation-settings:"opsz" 72}
.prose blockquote{margin:1.6em 0;padding:4px 0 4px 22px;border-left:3px solid var(--contrast);font-style:italic;font-size:1.12em;line-height:1.5}
.pull{margin:2em 0;padding-block:22px;border-block:1.5px solid var(--rule-strong)}
.pull p{font-size:clamp(24px,2.6vw,30px);line-height:1.3;font-style:italic;letter-spacing:-.01em}
.pull cite{display:block;margin-top:10px;font-style:normal}
.prose sup a{font-family:var(--sans);font-size:.62em;font-weight:700;text-decoration:none;padding:0 .15em}
.photo{margin:1.8em 0;border:1px dashed var(--muted);background:var(--paper-2);aspect-ratio:3/2;display:grid;place-items:center;text-align:center;padding:16px;font-family:var(--mono);font-size:11px;color:var(--muted)}
.photo-cap{font-family:var(--sans);font-size:13.5px;color:var(--muted);margin-top:-1.2em}

/* margin notes: in the right column on wide screens, inline toggles on phones */
.mn{display:none}
.mn-btn{display:inline-flex;align-items:center;justify-content:center;width:1.25em;height:1.25em;margin-left:.15em;border:1px solid var(--contrast);border-radius:50%;background:transparent;color:var(--contrast);font-family:var(--sans);font-size:.62em;font-weight:700;vertical-align:.4em;cursor:pointer}
.mn.open{display:block;margin:.8em 0;padding:12px 14px;background:var(--card);border-left:2px solid var(--contrast);font-family:var(--sans);font-size:14px;line-height:1.5;color:var(--ink-2)}
.side{display:none}
@media (min-width:1180px){
  .mn-btn{display:none}
  .mn.open{display:none}
  .side{display:block;position:relative}
  .side .mnote{position:absolute;left:0;right:0;font-family:var(--sans);font-size:13.5px;line-height:1.5;color:var(--ink-2);padding-left:14px;border-left:2px solid var(--rule)}
  .side .mnote.hot{border-color:var(--contrast)}
}
.mnote .label{display:block;margin-bottom:4px;color:var(--contrast)}
.mnote a{display:block;margin-top:6px;font-family:var(--serif);font-size:15px;line-height:1.3;color:var(--ink)}
.mnote a:hover{text-decoration:underline}

.endmark{display:flex;justify-content:center;margin-block:2.4em 0;color:var(--contrast)}
.endmark svg{width:46px;height:20px}
.fns{max-width:var(--measure);margin:48px auto 0;padding-top:16px;border-top:1px solid var(--rule)}
.fns ol{list-style:decimal;padding-left:1.4em;font-family:var(--sans);font-size:14px;line-height:1.55;color:var(--ink-2)}
.fns li+li{margin-top:8px}
.fns a{color:var(--contrast)}
.authorbox{max-width:var(--measure);margin:48px auto 0;display:grid;grid-template-columns:64px minmax(0,1fr);gap:16px;padding:22px;border:1px solid var(--rule);background:var(--card)}
.authorbox .av{width:64px;height:64px;border-radius:50%;background:var(--paper-2);border:1px dashed var(--muted);display:grid;place-items:center;font-family:var(--mono);font-size:8.5px;color:var(--muted);text-align:center}
.authorbox h3{font-size:20px}
.authorbox p{font-family:var(--sans);font-size:14.5px;line-height:1.55;color:var(--ink-2);margin-top:6px}
.reading-nl{max-width:var(--measure);margin:32px auto 0;padding:24px;border:1.5px solid var(--rule-strong)}
.reading-nl h3{font-size:24px;margin-bottom:6px}
.reading-nl p{font-family:var(--sans);font-size:14.5px;color:var(--muted);margin-bottom:14px}
.comments-note{max-width:var(--measure);margin:24px auto 0;font-family:var(--sans);font-size:14px;color:var(--muted)}
.keep{margin-top:var(--s8)}
.keep .grid{display:grid;gap:28px}
@media (min-width:760px){.keep .grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rprog{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--paper) 92%,transparent);backdrop-filter:blur(6px);border-bottom:1px solid var(--rule)}
.rprog .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:48px}
.rprog .wm-sm{font-family:var(--serif);font-weight:560;font-size:19px;letter-spacing:-.02em;white-space:nowrap}
.rprog .wm-sm b{font-family:var(--sans);font-stretch:75%;font-weight:700;font-size:10px;letter-spacing:.08em;color:var(--contrast);border:1.5px solid currentColor;padding:1px 3px;margin-left:4px;vertical-align:3px}
.rprog .ttl{flex:1;min-width:0;font-family:var(--sans);font-size:13.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transition:opacity .25s ease}
.rprog.scrolled .ttl{opacity:1}
.rprog .bar{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--contrast)}
.rprog .jtip{position:absolute;bottom:-9px;width:16px;height:12px;color:var(--contrast);transform:translateX(-2px)}

/* ==========================================================================
   Review pages (overview, system, illustrations)
   ========================================================================== */
.doc-h{padding-top:clamp(36px,6vw,80px);max-width:900px}
.doc-h h1{font-size:clamp(40px,6.4vw,80px);font-variation-settings:"opsz" 72;line-height:1;margin-block:14px 18px}
.doc-h .dek{max-width:44rem}
.grid-2{display:grid;gap:24px}
@media (min-width:860px){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}
.grid-3{display:grid;gap:20px}
@media (min-width:760px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.panel{border:1px solid var(--rule);background:var(--card);padding:clamp(18px,2.4vw,28px);min-width:0}
.panel h3{font-size:22px;margin-bottom:8px}
.panel p{font-family:var(--sans);font-size:15px;line-height:1.55;color:var(--ink-2)}
.tile{display:grid;grid-template-rows:auto 1fr;border:1px solid var(--rule);background:var(--card);min-width:0;transition:border-color .2s ease}
.tile:hover{border-color:var(--ink)}
.tile .plate{aspect-ratio:16/10}
.tile .body{padding:18px 20px 20px;display:grid;gap:8px;align-content:start}
.tile h3{font-size:24px}
.tile p{font-family:var(--sans);font-size:14.5px;line-height:1.5;color:var(--muted)}
.checklist li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;padding-block:12px;border-bottom:1px solid var(--rule);font-family:var(--sans);font-size:15.5px;line-height:1.5}
.checklist li::before{content:"";width:16px;height:16px;margin-top:3px;border:1.5px solid var(--ink);border-radius:2px}
.swatch{display:grid;grid-template-rows:84px auto;border:1px solid var(--rule);background:var(--card);min-width:0}
.swatch .c{border-bottom:1px solid var(--rule)}
.swatch .t{padding:10px 12px;display:grid;gap:2px}
.swatch b{font-family:var(--sans);font-size:14px;font-weight:600}
.swatch span{font-family:var(--mono);font-size:11px;color:var(--muted)}
.sw-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.specimen{border-top:1px solid var(--rule);padding-block:18px;display:grid;gap:8px}
@media (min-width:860px){.specimen{grid-template-columns:220px minmax(0,1fr);gap:28px;align-items:baseline}}
.specimen .k{font-family:var(--mono);font-size:11px;color:var(--muted);line-height:1.5}
.hubrow{display:grid;gap:10px}
@media (min-width:760px){.hubrow{grid-template-columns:repeat(5,minmax(0,1fr))}}
.hubcard{border:1px solid var(--rule);background:var(--card);min-width:0}
.hubcard .plate{aspect-ratio:4/3}
.hubcard .t{padding:12px 14px;display:grid;gap:4px}
.hubcard .fr{font-family:var(--mono);font-size:11px;color:var(--muted)}
.rules li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:12px;padding-block:14px;border-top:1px solid var(--rule)}
.rules .k{font-family:var(--serif);font-size:26px;line-height:1;color:var(--contrast)}
.rules h4{font-size:19px;margin-bottom:4px}
.rules p{font-family:var(--sans);font-size:15px;line-height:1.55;color:var(--ink-2)}
.gen{display:grid;gap:20px}
@media (min-width:900px){.gen{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);align-items:start}}
.gen .plate{aspect-ratio:16/10}
.gen label{display:block;font-family:var(--sans);font-size:13px;font-weight:600;margin-bottom:6px}
.gen select,.gen input[type=text]{width:100%;min-height:44px;padding:0 12px;border:1.5px solid var(--ink);border-radius:2px;background:var(--field);color:var(--ink);font-family:var(--sans);font-size:15px}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.fig{margin:1.8em 0}
.fig img{width:auto;max-width:100%;max-height:560px;margin-inline:auto;border:1px solid var(--rule)}
.fig figcaption{margin-top:10px;font-family:var(--sans);font-size:13.5px;line-height:1.5;color:var(--muted);text-align:center}
.prose blockquote p{margin:0}
.mn-a{display:inline-block;width:0;height:1em;vertical-align:top}
/* contact sheet */
.sheet{display:grid;grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:14px 12px;padding:16px;background:var(--band);border-radius:2px}
.cs{display:grid;gap:5px;min-width:0;color:var(--band-ink)}
.cs .plate{aspect-ratio:1}
.cs-n{font-family:var(--mono);font-size:10px;color:var(--band-muted)}
.cs-t{font-family:var(--sans);font-size:11.5px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cs:hover .cs-t{text-decoration:underline}
/* overview */
.steps-m{display:grid;gap:0;border-top:1.5px solid var(--rule-strong)}
.steps-m li{display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:16px;align-items:baseline;padding-block:16px;border-bottom:1px solid var(--rule)}
.steps-m .k{font-family:var(--serif);font-size:34px;line-height:1;color:var(--muted)}
.steps-m li.now .k{color:var(--contrast)}
.steps-m h4{font-size:20px}
.steps-m p{font-family:var(--sans);font-size:14.5px;color:var(--muted);margin-top:4px}
.steps-m .st{font-family:var(--mono);font-size:11px;color:var(--muted);white-space:nowrap}
.steps-m li.now .st{color:var(--contrast)}
.arch>*,.two>*,.about>*,.strip-in>*,.lead>*,.band-head>*,.nl>*,.grid-2>*,.grid-3>*{min-width:0}
@media (max-width:639px){
  .iconbtn kbd{display:none}
  .step .plate{aspect-ratio:16/10}
  .yr{min-width:50px}
  .yr .y{font-size:16px}
  .yr .bars i{width:16px}
}
@media (hover:none){.iconbtn kbd{display:none}}