/* spillway.sh · the stylesheet
   One sheet for every page, served from /assets/ under its content hash (site.<hash>.css). /assets/**
   is cached for a year as immutable, so a change is a new file: edit this one in place, then run
   `python3 tools/fingerprint.py assets/site.<hash>.css` (README, "One stylesheet, fingerprinted").
   Rules the pages keep: no style="" attribute and no <style> element (the edge CSP is style-src 'self'),
   so every drawn state is a class here. System faces until the site self-hosts its own (README, "Fonts").
   Tokens are the :root block; the dark block below redefines the same names. */

:root{
  --paper:#fafaf8;        /* the page */
  --plate:#f1f0ec;        /* the quieter band */
  --card:#ffffff;         /* a card on the page */
  --ink:#16161a;          /* every word */
  --ink-2:#3d3d45;        /* the sentence under a headline */
  --dim:#5c5c66;          /* captions, dates, labels */
  --hair:#e2e1dc;         /* one-pixel rules */
  --accent:#2b55c8;       /* links that act, and the one button */
  --accent-ink:#ffffff;   /* words on the accent */
  --mid:#16161a;          /* the one dark surface, at the foot */
  --mid-ink:#f2f2f0;
  --mid-dim:#a9a9b3;
  --mid-hair:#2d2d34;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r:6px;                /* controls */
  --r-card:12px;          /* cards */
  --wrap:1120px;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#111114;--plate:#17171b;--card:#1c1c21;--ink:#f2f2f0;--ink-2:#d0d0d6;--dim:#a2a2ad;
    --hair:#2b2b32;--accent:#93b2ff;--accent-ink:#0c1226;--mid:#0a0a0c;--mid-ink:#f2f2f0;
    --mid-dim:#a2a2ad;--mid-hair:#24242a;
  }
}

/* ground */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;font-family:var(--sans);font-size:17px;line-height:1.55;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.site{min-height:50vh}
h1,h2,h3,p,figure,blockquote,ol,ul{margin:0}
ol,ul{padding:0}
a{color:inherit}
img,svg{display:block}
img{max-width:100%;height:auto}
b,strong{font-weight:600}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 32px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* the headline voice: the serif, medium weight, never bold */
.h1,.h2,.h3,.prose h1,.prose h2,.item h2,.foot-wordmark{font-family:var(--serif);font-weight:500;text-wrap:balance}
.h1,.prose h1{font-size:clamp(38px,5vw,60px);line-height:1.05;letter-spacing:-.015em;max-width:16ch}
.h2,.prose h2{font-size:clamp(28px,3.4vw,40px);line-height:1.1;letter-spacing:-.01em;max-width:22ch}
.h3{font-size:22px;line-height:1.2}
.kicker{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin-bottom:18px}
.kicker a{text-decoration:none}
.kicker a:hover{text-decoration:underline}
.sub,.standfirst{font-size:20px;line-height:1.5;color:var(--ink-2);max-width:40ch;margin-top:20px}

/* the header: the mark and the name, then the links; aria-current marks the section */
.nav{border-bottom:1px solid var(--hair);background:var(--paper)}
.nav-in{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:24px}
.nav-mark{display:inline-flex;align-items:center;gap:10px;font-weight:600;text-decoration:none}
.nav-mark svg{fill:currentColor}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{text-decoration:none;color:var(--ink-2)}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}

/* sections */
.hero{padding:96px 0 88px}
.sec{padding:80px 0;border-top:1px solid var(--hair)}
.plate{background:var(--plate)}
.act{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px}
.btn{display:inline-block;padding:12px 20px;border-radius:var(--r);background:var(--accent);color:var(--accent-ink);font-weight:600;text-decoration:none}
.btn:hover{filter:brightness(1.08)}
.link{color:var(--ink);text-underline-offset:4px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:40px}
.card{background:var(--card);border:1px solid var(--hair);border-radius:var(--r-card);padding:28px}
.card p{color:var(--ink-2);margin-top:10px}

/* questions: every answer is a <details>, mirrored in FAQPage markup */
.faq{margin-top:32px;max-width:760px;border-top:1px solid var(--hair)}
.faq details{border-bottom:1px solid var(--hair)}
.faq summary{cursor:pointer;list-style:none;padding:20px 32px 20px 0;font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:18px;font-weight:400;color:var(--dim)}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 0 22px;color:var(--ink-2);max-width:62ch}

/* the blog index */
.list{margin-top:48px;max-width:760px}
.item{padding:28px 0;border-top:1px solid var(--hair)}
.item time,.by{font-size:14px;color:var(--dim)}
.item h2{font-size:28px;line-height:1.2;margin:8px 0 10px}
.item h2 a{text-decoration:none}
.item h2 a:hover{text-decoration:underline;text-underline-offset:4px}
.item p{color:var(--ink-2)}
.by{margin-top:10px}

/* a post */
.prose{max-width:720px;padding-top:72px;padding-bottom:96px}
.prose p{margin-top:20px}
.prose .standfirst{margin-top:24px;margin-bottom:12px}
.prose h2{margin-top:48px}
.prose a{text-underline-offset:3px}
.sources{margin-top:56px;padding-top:24px;border-top:1px solid var(--hair);font-size:15px;color:var(--dim)}
.sources h2{font-family:var(--sans);font-size:15px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;margin:0}
.sources ol{padding-left:20px;margin-top:12px}

/* the foot: the one dark surface */
.band{background:var(--mid);color:var(--mid-ink)}
.foot{padding:72px 0 40px}
.foot-cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.foot h2{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--mid-dim);margin-bottom:14px}
.foot ul{list-style:none;display:grid;gap:8px}
.foot a{color:var(--mid-ink);text-decoration:none}
.foot a:hover{text-decoration:underline;text-underline-offset:4px}
.foot p{color:var(--mid-dim)}
.foot-wordmark{font-size:clamp(64px,14vw,180px);line-height:1.2;letter-spacing:-.03em;color:var(--mid-dim);margin:64px 0 28px;white-space:nowrap;overflow:hidden}
.legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:20px;border-top:1px solid var(--mid-hair);font-size:14px}

/* the 404 page */
.missing{padding:120px 0}

/* phones */
@media (max-width:760px){
  .wrap{padding:0 20px}
  .hero{padding:64px 0 56px}
  .sec{padding:56px 0}
  .cards{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr}
  .nav-links{gap:20px}
  .prose{padding-top:48px}
}