/* ============================================================
   The Retired Racer — shared design system (bold magazine print)
   Themes: light (default) / sepia / dark — persisted via localStorage
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}

:root{
  color-scheme:light;
  --paper:#FBF8F1;
  --paper-2:#F2ECDF;
  --ink:#1C1913;
  --ink-soft:#5F5748;
  --rule:#D9D2C3;
  --accent:#0B5C43;
  --accent-ink:#FBF8F1;
  --accent-2:#A23B2D;
  --sel:rgba(11,92,67,.14);
  --font-display:"Fraunces",Georgia,"Times New Roman",serif;
  --font-body:"Source Serif 4",Georgia,"Times New Roman",serif;
  --font-ui:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
[data-theme="sepia"]{
  color-scheme:light;
  --paper:#F2E6CF;
  --paper-2:#E8D8B8;
  --ink:#33261A;
  --ink-soft:#6E5A40;
  --rule:#CFBC98;
  --accent:#7A5114;
  --accent-ink:#F7EFDC;
  --accent-2:#9C4A2B;
  --sel:rgba(122,81,20,.15);
}
[data-theme="dark"]{
  color-scheme:dark;
  --paper:#151511;
  --paper-2:#1F1E18;
  --ink:#EDE8DC;
  --ink-soft:#A79F90;
  --rule:#3A372C;
  --accent:#5FBE93;
  --accent-ink:#0E1F17;
  --accent-2:#E0745F;
  --sel:rgba(95,190,147,.16);
}

html{font-size:16px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:1.02rem;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

::selection{background:var(--sel)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
strong{font-weight:640}
em{font-style:italic}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:50;
  background:var(--ink);color:var(--paper);padding:8px 14px;
  font-family:var(--font-ui);font-size:.85rem;text-decoration:none;
}
.skip-link:focus{left:8px;top:8px}

/* ---------- frame ---------- */
.frame{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- masthead ---------- */
.site-head{border-bottom:1px solid var(--ink)}
.site-head .frame{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding-block:14px 12px;
}
.brand{display:flex;align-items:baseline;gap:12px;text-decoration:none;color:inherit}
.brand-name{
  font-family:var(--font-display);font-weight:600;font-size:1.16rem;
  letter-spacing:-.01em;color:var(--ink);
}
.brand-sub{font-family:var(--font-ui);font-size:.74rem;color:var(--ink-soft);letter-spacing:.05em}

.theme-switch{display:inline-flex;border:1px solid var(--rule);background:var(--paper-2)}
.theme-switch button{
  appearance:none;border:0;background:transparent;color:var(--ink-soft);
  font-family:var(--font-ui);font-size:.75rem;font-weight:500;line-height:1;
  padding:8px 12px;cursor:pointer;transition:color .15s ease,background-color .15s ease;
}
.theme-switch button + button{border-left:1px solid var(--rule)}
.theme-switch button:hover{color:var(--ink)}
.theme-switch button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}

/* ---------- hero ---------- */
.hero{border-bottom:3px double var(--ink);padding:34px 0 26px;margin-bottom:10px}
.kicker{
  font-family:var(--font-ui);font-size:.73rem;font-weight:600;
  letter-spacing:.15em;text-transform:uppercase;color:var(--accent);
}
h1{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2.35rem,5.6vw,4.1rem);
  line-height:1.03;letter-spacing:-.022em;
  margin:12px 0 14px;max-width:24ch;
}
h1 em{font-style:italic;color:var(--accent)}
.dek{font-size:1.17rem;line-height:1.55;color:var(--ink-soft);max-width:66ch;margin:0 0 22px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px 24px;
  border-top:1px solid var(--rule);padding-top:12px;
  font-family:var(--font-ui);font-size:.79rem;color:var(--ink-soft);
}
.hero-meta b{color:var(--ink);font-weight:600}

/* ---------- guide contents strip ---------- */
.contents{display:grid;grid-template-columns:repeat(5,1fr);border-bottom:1px solid var(--rule)}
.contents a{
  display:block;padding:15px 14px 17px;border-left:1px solid var(--rule);
  text-decoration:none;color:inherit;position:relative;
  transition:background-color .15s ease;
}
.contents a:first-child{border-left:0}
.contents a:hover,.contents a[aria-current="page"]{background:var(--paper-2)}
.contents .num{font-family:var(--font-ui);font-size:.68rem;font-weight:600;letter-spacing:.13em;color:var(--accent)}
.contents .t{display:block;font-family:var(--font-display);font-weight:600;font-size:1.02rem;margin:6px 0 4px;letter-spacing:-.005em}
.contents .d{font-family:var(--font-ui);font-size:.75rem;color:var(--ink-soft);line-height:1.45}
.contents a[aria-current="page"]::after{content:"";position:absolute;left:-1px;right:-1px;top:-1px;height:3px;background:var(--accent)}
@media(max-width:980px){
  .contents{grid-template-columns:1fr;border-bottom:0}
  .contents a{border-left:0;border-top:1px solid var(--rule)}
  .contents a:first-child{border-top:0}
}

/* ---------- page grid: article + on-this-page ---------- */
.page{
  display:grid;grid-template-columns:minmax(0,1fr) 246px;
  gap:0 46px;padding:34px 0 8px;align-items:start;
}
.page.single{grid-template-columns:minmax(0,1fr)}
.prose{max-width:72ch;min-width:0}
@media(max-width:980px){
  .page{grid-template-columns:minmax(0,1fr);padding-top:26px}
  .toc{display:none}
}

/* ---------- typography ---------- */
h2{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(1.45rem,2.6vw,1.95rem);
  line-height:1.18;letter-spacing:-.012em;
  margin:40px 0 14px;padding-top:18px;border-top:1px solid var(--rule);
  scroll-margin-top:20px;
}
.prose > h2:first-of-type{margin-top:6px}
h3{font-family:var(--font-display);font-weight:600;font-size:1.22rem;letter-spacing:-.005em;margin:24px 0 8px;line-height:1.3}
p{margin:0 0 13px}
ul,ol{margin:0 0 14px;padding-left:1.25rem}
li{margin:6px 0}
li::marker{color:var(--accent)}
.fine{font-family:var(--font-ui);font-size:.78rem;color:var(--ink-soft);line-height:1.55}

/* checklist */
.check{list-style:none;padding:0;margin:6px 0 14px}
.check li{padding:7px 0 7px 28px;position:relative;border-bottom:1px dashed var(--rule);margin:0}
.check li::before{
  content:"";position:absolute;left:2px;top:13px;width:12px;height:12px;
  border:1.5px solid var(--accent);
}

/* ---------- tables ---------- */
.tablewrap{overflow-x:auto;margin:16px 0;border:1px solid var(--rule)}
table{border-collapse:collapse;width:100%;font-size:.95rem;background:var(--paper)}
th{
  font-family:var(--font-ui);font-weight:600;font-size:.72rem;letter-spacing:.05em;
  color:var(--ink-soft);text-align:left;border-bottom:2px solid var(--ink);padding:9px 12px;
  background:var(--paper-2);white-space:nowrap;
}
td{border-bottom:1px solid var(--rule);padding:10px 12px;vertical-align:top;line-height:1.55}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--paper-2)}
td:has(strong){min-width:0}

/* ---------- callouts ---------- */
.note,.warn,.info{
  border-left:2px solid var(--accent);background:var(--paper-2);
  padding:14px 18px;margin:18px 0;font-size:.97rem;
}
.warn{border-left-color:var(--accent-2)}
.info{border-left-color:var(--ink);background:transparent;border-top:1px solid var(--rule);border-right:1px solid var(--rule);border-bottom:1px solid var(--rule)}

/* ---------- pull / key rule ---------- */
.pull{
  font-family:var(--font-display);font-style:italic;font-weight:500;
  font-size:1.28rem;line-height:1.42;color:var(--ink);
  max-width:58ch;padding:14px 0;border-block:1px solid var(--rule);margin:24px 0 18px;
}

/* ---------- two-col panels ---------- */
.two{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin:20px 0}
@media(max-width:760px){.two{grid-template-columns:1fr}}
.panel{border:1px solid var(--rule);padding:16px 20px 18px}
.panel-t{font-family:var(--font-display);font-weight:600;font-size:1.1rem;margin:0 0 10px}

/* ---------- cover list (home) ---------- */
.cover-list{border-top:1px solid var(--ink);margin-top:4px}
.cover-item{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:24px;align-items:baseline;
  padding:24px 4px;border-bottom:1px solid var(--rule);
  text-decoration:none;color:inherit;transition:background-color .15s ease;
}
.cover-item:hover{background:var(--paper-2)}
.cover-num{
  font-family:var(--font-display);font-weight:600;line-height:.9;
  font-size:clamp(2.4rem,5vw,3.6rem);color:var(--rule);
  transition:color .15s ease;min-width:2.2ch;
}
.cover-item:hover .cover-num,.cover-item[aria-current="page"] .cover-num{color:var(--accent)}
.cover-t{font-family:var(--font-display);font-weight:600;font-size:1.3rem;letter-spacing:-.01em;color:var(--ink)}
.cover-d{font-family:var(--font-ui);font-size:.85rem;color:var(--ink-soft);margin-top:5px;max-width:62ch;line-height:1.5}
.cover-go{font-family:var(--font-ui);font-size:.8rem;font-weight:600;color:var(--accent);white-space:nowrap}
@media(max-width:700px){
  .cover-item{grid-template-columns:1fr;gap:6px;padding:20px 0}
  .cover-go{display:none}
}

/* ---------- on this page (sticky) ---------- */
.toc{
  position:sticky;top:22px;
  border-left:1px solid var(--rule);padding-left:18px;
  font-family:var(--font-ui);font-size:.82rem;
}
.toc-t{font-size:.68rem;font-weight:600;letter-spacing:.14em;color:var(--ink-soft);display:block;margin-bottom:10px}
.toc a{display:block;color:var(--ink-soft);text-decoration:none;padding:3px 0;line-height:1.4}
.toc a:hover{color:var(--accent);text-decoration:underline}

/* ---------- FAQ ---------- */
.faq{margin:44px 0 10px;border-top:3px double var(--ink);padding-top:22px}
.faq-t{font-family:var(--font-display);font-weight:600;font-size:1.6rem;letter-spacing:-.01em;margin:0 0 6px}
.faq-d{color:var(--ink-soft);font-size:.95rem;margin:0 0 10px}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{
  cursor:pointer;list-style:none;position:relative;
  padding:13px 34px 13px 0;
  font-family:var(--font-display);font-weight:600;font-size:1.06rem;line-height:1.35;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:2px;top:10px;
  font-family:var(--font-ui);color:var(--accent);font-size:1.15rem;line-height:1;
}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 14px;color:var(--ink-soft);font-size:.97rem}
.faq .a p{margin:0 0 8px}
.faq .a p:last-child{margin-bottom:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-family:var(--font-ui);font-size:.84rem;font-weight:600;
  letter-spacing:.01em;text-decoration:none;text-align:center;
  color:var(--accent-ink);background:var(--accent);border:1px solid var(--accent);
  padding:10px 18px;transition:background-color .15s ease,border-color .15s ease,color .15s ease;
}
.btn:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--rule)}
.btn-ghost:hover{background:var(--paper-2);color:var(--ink);border-color:var(--ink)}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--ink);margin-top:50px;padding:28px 0 52px;font-family:var(--font-ui);font-size:.8rem;color:var(--ink-soft)}
.site-foot .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:28px}
.site-foot h4{font-family:var(--font-ui);font-size:.7rem;font-weight:600;letter-spacing:.13em;color:var(--ink);margin:0 0 10px}
.site-foot ul{margin:0;padding:0;list-style:none}
.site-foot li{margin:5px 0}
.site-foot a{color:var(--ink-soft);text-decoration-underline-offset:2px}
.site-foot a:hover{color:var(--accent)}
.site-foot .fine{margin-top:18px;border-top:1px solid var(--rule);padding-top:14px}
@media(max-width:760px){.site-foot .cols{grid-template-columns:1fr;gap:20px}}

/* ---------- motion & print ---------- */
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}
@media print{
  :root{--paper:#fff;--paper-2:#f4f4f4;--ink:#000;--ink-soft:#333;--rule:#999;--accent:#000;--accent-ink:#fff;--accent-2:#000;color-scheme:light}
  body{font-size:11pt}
  .theme-switch,.toc,.skip-link,.cover-go,.contents{display:none}
  .site-head{border-bottom:2px solid #000}
  .hero{border-bottom:3px double #000}
  a{color:#000}
  .page{grid-template-columns:minmax(0,1fr);padding-top:18px}
  h2{break-after:avoid}
  .faq details{break-inside:avoid}
  .tablewrap{overflow:visible;border:1px solid #999}
}