/* T-TRAK Australia — shared design system
   V/Line-inspired (purple, clean, accessible) but with its own editorial identity:
   warmer neutrals, serif display type, brass technical accents.
*/

:root{
  /* purple — primary */
  --purple:#4F2D7F;
  --purple-2:#6B4998;
  --purple-3:#8A6FB1;
  --purple-soft:#E5DCEF;
  --purple-deep:#3A1F62;
  /* secondary — eucalyptus + brass */
  --euc:#4F6E51;
  --euc-soft:#D8E3D4;
  --brass:#B58841;
  --brass-soft:#E8D9B8;
  /* signal red (sparingly) */
  --red:#C44536;
  --red-soft:#F4D9D5;
  /* neutrals — warmer than V/Line */
  --bg:#FBF8F1;
  --bg-2:#F4EFE1;
  --bg-3:#ECE6D2;
  --card:#FFFFFF;
  --ink:#2A2D34;
  --ink-2:#5C5F66;
  --ink-3:#8A8D94;
  --rule:#E0D9C7;
  --rule-2:#CFC7B3;
  /* status */
  --good:#4F8B5A;
  --warn:#C9A227;
  --crit:#C44536;
  /* accents */
  --link:#4F2D7F;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.6;
  font-feature-settings:"ss01","cv11";
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--purple);color:#fff}
img,svg{max-width:100%;display:block}
a{color:var(--link);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .15s}
a:hover{border-bottom-color:var(--purple)}
a:focus-visible{outline:2px solid var(--purple);outline-offset:2px}

h1,h2,h3,h4,h5{
  font-family:'Fraunces','Source Serif 4',Georgia,serif;
  color:var(--ink);
  margin:0 0 .4em;
  letter-spacing:-.012em;
  font-weight:500;
  line-height:1.15;
}
h1{font-size:clamp(2.4rem,5vw,3.6rem);font-weight:400}
h1 em{font-style:italic;color:var(--purple);font-weight:400}
h2{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:500}
h3{font-size:1.4rem;font-weight:500}
h4{font-size:1.1rem;font-weight:600;font-family:'Inter',sans-serif;letter-spacing:0}
h5{font-size:.78rem;font-family:'Inter',sans-serif;font-weight:600;text-transform:uppercase;letter-spacing:.13em;color:var(--ink-2)}

p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:22px}
li{margin-bottom:.4em}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace;font-feature-settings:"zero","ss01"}
strong{font-weight:600}

/* layout */
.wrap{max-width:1200px;margin:0 auto;padding:0 clamp(20px,4vw,48px)}
.wrap-narrow{max-width:780px;margin:0 auto;padding:0 clamp(20px,4vw,48px)}
.wrap-wide{max-width:1440px;margin:0 auto;padding:0 clamp(20px,4vw,48px)}

/* skip link */
.skip{position:absolute;left:-9999px;top:auto}
.skip:focus{position:fixed;left:8px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;z-index:1000;border-radius:0}

/* edition strip — soft cream bar above header */
.edition-strip{
  background:var(--brass-soft);
  color:#6e5318;
  border-bottom:1px solid var(--brass);
  font-size:.86rem;
  padding:8px 0;
}
.edition-strip strong{color:#5e4515;margin-right:8px}
.edition-strip a{color:#6e5318;border-bottom:1px solid #c2a366}
.edition-strip .row{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}

/* primary header — purple band */
.site-header{
  background:var(--purple);
  color:#fff;
  border-bottom:3px solid var(--brass);
}
.site-header .row{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 0;gap:24px;
}
.brand{
  display:flex;align-items:baseline;gap:12px;color:#fff;
  font-family:'Fraunces',serif;font-weight:500;font-size:1.6rem;letter-spacing:-.01em;
  border-bottom:0;
}
.brand .slash{
  display:inline-block;width:3px;height:1.4em;background:var(--brass);transform:skewX(-12deg);align-self:center;
}
.brand small{
  font-family:'Inter',sans-serif;font-size:.7rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.18em;color:rgba(255,255,255,.85);
}
.brand:hover{border-bottom:0;color:#fff}

.site-header .meta{display:flex;align-items:center;gap:24px;font-size:.85rem}
.site-header .meta a{color:rgba(255,255,255,.9);border-bottom:1px solid transparent}
.site-header .meta a:hover{color:#fff;border-bottom-color:var(--brass)}
.site-header .search{
  display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.9);
  border:1px solid rgba(255,255,255,.25);padding:7px 14px;font-size:.85rem;
}
.site-header .search:hover{border-color:#fff;color:#fff}
.site-header .search svg{width:14px;height:14px;fill:currentColor}

/* primary nav */
.site-nav{
  background:var(--ink);
  border-bottom:1px solid var(--purple-deep);
}
.site-nav ul{
  display:flex;list-style:none;margin:0;padding:0;gap:0;
  flex-wrap:wrap;
}
.site-nav a{
  display:inline-block;padding:14px 18px;color:#e6e2da;font-size:.9rem;
  border-bottom:3px solid transparent;border-left:1px solid rgba(255,255,255,.06);
  transition:background .15s,color .15s,border-color .15s;
}
.site-nav li:first-child a{border-left:0}
.site-nav a:hover{background:rgba(255,255,255,.06);color:#fff;border-bottom-color:var(--brass)}
.site-nav a[aria-current=page]{
  background:rgba(255,255,255,.08);color:#fff;border-bottom-color:var(--brass);
}

/* sub-nav (within section) */
.subnav{
  background:var(--bg-2);border-bottom:1px solid var(--rule);
}
.subnav ul{
  display:flex;list-style:none;margin:0;padding:0;gap:0;flex-wrap:wrap;
  max-width:1200px;margin:0 auto;padding:0 clamp(20px,4vw,48px);
}
.subnav a{
  display:inline-block;padding:12px 18px;color:var(--ink-2);font-size:.85rem;
  font-weight:500;border-bottom:3px solid transparent;
}
.subnav a:hover{color:var(--purple);border-bottom-color:var(--purple-3)}
.subnav a[aria-current=page]{color:var(--purple);border-bottom-color:var(--purple)}

/* breadcrumbs */
.crumbs{padding:18px 0 6px;font-size:.84rem;color:var(--ink-2)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0}
.crumbs li{margin:0;display:inline-flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"›";color:var(--ink-3);margin:0 8px}
.crumbs a{color:var(--ink-2)}
.crumbs li[aria-current=page]{color:var(--purple)}

/* page header */
.page-header{
  padding:clamp(36px,6vw,72px) 0 clamp(28px,4vw,48px);
  border-bottom:1px solid var(--rule);
}
.page-header .kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brass);margin:0 0 1em;
}
.page-header .kicker::before{content:"";width:24px;height:1px;background:currentColor}
.page-header .lede{font-size:1.18rem;color:var(--ink-2);max-width:720px;margin-top:.6em;font-weight:300}

/* sections within content */
.section{padding:clamp(40px,6vw,72px) 0}
.section.alt{background:var(--bg-2)}
.section.dark{background:var(--ink);color:#e8e4dc}
.section.dark h2,.section.dark h3,.section.dark h4{color:#fff}
.section .lead{font-size:1.1rem;color:var(--ink-2);max-width:720px;margin-bottom:1.6em}

/* hero (home page) */
.hero{
  position:relative;background:var(--bg-2);overflow:hidden;
  border-bottom:1px solid var(--rule);
}
.hero-grid{
  display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(32px,5vw,72px);
  align-items:center;
  padding:clamp(48px,8vw,112px) 0;
  position:relative;z-index:1;
}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero-text h1{margin-bottom:.5em;line-height:1.05}
.hero-text .lede{font-size:1.18rem;color:var(--ink);max-width:560px;margin-bottom:1.6em}
.hero-text .lede strong{color:var(--purple);font-weight:500}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:1.4em}

/* buttons */
.btn{
  display:inline-block;padding:13px 26px;font-weight:500;font-size:.95rem;
  border:1px solid transparent;cursor:pointer;
  font-family:inherit;border-bottom:0;
}
.btn-primary{background:var(--purple);color:#fff}
.btn-primary:hover{background:var(--purple-deep);color:#fff;border-bottom:0}
.btn-secondary{background:transparent;color:var(--purple);border-color:var(--purple)}
.btn-secondary:hover{background:var(--purple);color:#fff;border-bottom:0}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--rule-2)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink);border-bottom:1px solid var(--ink)}

/* card grid */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.cards.cards-3{grid-template-columns:repeat(3,1fr)}
.cards.cards-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:880px){.cards.cards-3,.cards.cards-2{grid-template-columns:1fr}}
.card{
  background:var(--card);border:1px solid var(--rule);
  display:flex;flex-direction:column;overflow:hidden;
  transition:border-color .15s,transform .15s;
}
.card:hover{border-color:var(--purple-3);transform:translateY(-2px)}
.card .img{aspect-ratio:16/10;background:var(--bg-3);overflow:hidden;border-bottom:1px solid var(--rule)}
.card .img svg{width:100%;height:100%;display:block}
.card .body{padding:22px 24px;flex:1;display:flex;flex-direction:column;gap:10px}
.card h3{margin:0;font-size:1.25rem;color:var(--purple);font-family:'Fraunces',serif;font-weight:500}
.card .meta{font-size:.78rem;color:var(--ink-3);font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin:0}
.card p{margin:0;font-size:.95rem;color:var(--ink-2)}
.card .read{font-size:.86rem;color:var(--purple);font-weight:500;margin-top:auto;padding-top:8px}
.card .read::after{content:" →"}

/* topic strip — alternative to cards, denser */
.topic-strip{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0;
  border:1px solid var(--rule);background:var(--card);
}
.topic-strip a{
  display:block;padding:24px 28px;color:var(--ink);
  border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);
  transition:background .15s;border-bottom-color:var(--rule);
}
.topic-strip a:last-child{border-right:0}
.topic-strip a:hover{background:var(--bg-2);border-bottom-color:var(--rule)}
.topic-strip .num{
  display:block;font-family:'JetBrains Mono',monospace;font-size:.75rem;color:var(--brass);
  font-weight:500;margin-bottom:8px;
}
.topic-strip strong{display:block;font-family:'Fraunces',serif;font-size:1.15rem;font-weight:500;color:var(--purple);margin-bottom:4px}
.topic-strip span{font-size:.86rem;color:var(--ink-2)}

/* spec table */
.spec-table{width:100%;border-collapse:collapse;font-size:.94rem;background:var(--card);margin:1em 0}
.spec-table caption{
  text-align:left;background:var(--purple);color:#fff;padding:14px 20px;
  font-family:'Fraunces',serif;font-size:1.05rem;font-weight:500;
}
.spec-table th,.spec-table td{
  padding:12px 18px;text-align:left;border-bottom:1px solid var(--rule);vertical-align:top;
}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.spec-table th{font-weight:500;color:var(--ink);width:38%;font-size:.92rem}
.spec-table td.val{
  font-family:'JetBrains Mono',monospace;color:var(--ink);font-size:.93rem;
  width:30%;white-space:nowrap;font-weight:500;
}
.spec-table td.note{color:var(--ink-2);font-size:.9rem}
.spec-table tbody tr:nth-child(even){background:var(--bg-2)}

/* callout */
.callout{
  background:var(--card);border:1px solid var(--rule);
  border-left:4px solid var(--purple);
  padding:18px 22px;margin:1.4em 0;
}
.callout.brass{border-left-color:var(--brass)}
.callout.warn{border-left-color:var(--warn)}
.callout.crit{border-left-color:var(--crit)}
.callout .label{
  font-size:.74rem;text-transform:uppercase;font-weight:700;letter-spacing:.12em;
  color:var(--purple);margin-bottom:6px;
}
.callout.brass .label{color:var(--brass)}
.callout.warn .label{color:var(--warn)}
.callout.crit .label{color:var(--crit)}
.callout p:last-child{margin-bottom:0}

/* parts list */
.parts-list{
  list-style:none;padding:0;margin:1em 0;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:0;
  background:var(--card);border:1px solid var(--rule);
}
.parts-list li{
  display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:baseline;
  padding:11px 18px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);
  margin:0;
}
.parts-list .pn{font-family:'JetBrains Mono',monospace;color:var(--purple);font-size:.84rem;font-weight:500}
.parts-list .desc{font-size:.92rem;color:var(--ink-2)}
.parts-list .qty{font-size:.78rem;color:var(--ink-3);font-family:'JetBrains Mono',monospace}

/* two-column layout */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px)}
@media (max-width:760px){.two-col{grid-template-columns:1fr}}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,36px)}
@media (max-width:880px){.three-col{grid-template-columns:1fr}}

/* prose constraints */
.prose{max-width:680px}
.prose p,.prose ul,.prose ol{font-size:1.04rem;color:var(--ink);line-height:1.7}
.prose h2{margin-top:1.8em}
.prose h3{margin-top:1.4em;color:var(--purple)}

/* faq accordion */
details.q{border-bottom:1px solid var(--rule);background:var(--card)}
details.q summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
  gap:24px;padding:20px 24px;font-family:'Fraunces',serif;font-size:1.15rem;font-weight:500;
  color:var(--ink);
}
details.q summary::-webkit-details-marker{display:none}
details.q summary::after{
  content:"+";color:var(--purple);font-size:1.4rem;font-weight:300;line-height:1;flex-shrink:0;
}
details.q[open] summary::after{content:"−"}
details.q .a{padding:0 24px 22px;color:var(--ink-2);max-width:680px}
details.q .a p:last-child{margin-bottom:0}

/* paint chips */
.chips{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px;margin:1em 0 2em}
.chip{background:var(--card);border:1px solid var(--rule);overflow:hidden}
.chip .swatch{height:80px}
.chip .meta{padding:14px 16px}
.chip .nm{font-family:'Fraunces',serif;font-size:1.05rem;font-weight:500;color:var(--ink)}
.chip .br{font-size:.82rem;color:var(--ink-2);margin-top:2px}
.chip .cd{font-family:'JetBrains Mono',monospace;font-size:.74rem;color:var(--ink-3);margin-top:6px}

/* status indicator */
.status{display:inline-flex;align-items:center;gap:8px;font-size:.88rem;color:var(--ink-2)}
.status::before{content:"";display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--ink-3)}
.status.good::before{background:var(--good)}
.status.warn::before{background:var(--warn)}
.status.crit::before{background:var(--crit)}

/* technical diagram card */
.diagram{
  background:var(--card);border:1px solid var(--rule);padding:24px;margin:1.4em 0;
}
.diagram svg{width:100%;height:auto}
.diagram figcaption{
  font-family:'JetBrains Mono',monospace;font-size:.78rem;color:var(--ink-3);
  border-top:1px solid var(--rule);padding-top:12px;margin-top:14px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  letter-spacing:.04em;
}

/* state grid */
.state-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:0;
  background:var(--card);border:1px solid var(--rule);
}
.state-grid > div{padding:18px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.state-grid .cd{font-family:'JetBrains Mono',monospace;color:var(--brass);font-size:.82rem;font-weight:500;margin-bottom:4px}
.state-grid .nm{font-family:'Fraunces',serif;font-size:1rem;color:var(--ink);font-weight:500}

/* on-page TOC sidebar */
.with-toc{display:grid;grid-template-columns:1fr 220px;gap:48px;align-items:start}
@media (max-width:980px){.with-toc{grid-template-columns:1fr}.with-toc .toc{position:static!important;border-left:0;border-top:1px solid var(--rule);padding:18px 0 0}}
.toc{
  position:sticky;top:24px;border-left:2px solid var(--rule);padding-left:20px;
  font-size:.86rem;
}
.toc h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.13em;color:var(--ink-3);font-weight:600;margin-bottom:14px}
.toc ul{list-style:none;padding:0;margin:0}
.toc li{margin-bottom:8px}
.toc a{color:var(--ink-2)}
.toc a:hover{color:var(--purple)}

/* footer */
.site-footer{
  background:var(--ink);color:#cbc8bf;padding:60px 0 30px;font-size:.92rem;
  border-top:4px solid var(--brass);
}
.site-footer .grid{
  display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:36px;
  padding-bottom:36px;border-bottom:1px solid #383a40;
}
@media (max-width:820px){.site-footer .grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.site-footer .grid{grid-template-columns:1fr}}
.site-footer h5{font-family:'Fraunces',serif;color:#fff;font-weight:400;font-size:1.2rem;margin-bottom:14px;text-transform:none;letter-spacing:0}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#cbc8bf;border-bottom:1px solid transparent}
.site-footer a:hover{color:#fff;border-bottom-color:var(--brass)}
.site-footer .brand-foot{font-family:'Fraunces',serif;color:#fff;font-size:1.5rem;font-weight:400;margin-bottom:14px;display:flex;align-items:baseline;gap:10px}
.site-footer .brand-foot .slash{display:inline-block;width:2px;height:1em;background:var(--brass);transform:skewX(-12deg)}
.site-footer p{color:#a8a59c;line-height:1.6}
.site-footer .country{padding:24px 0;color:#cbc8bf;font-style:italic;border-bottom:1px solid #383a40;font-size:.9rem;line-height:1.7}
.site-footer .legal{padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:#85837a;font-size:.82rem}

/* pull quote */
blockquote.pull{
  font-family:'Fraunces',serif;font-size:1.45rem;line-height:1.4;color:var(--ink);
  border-left:3px solid var(--brass);padding:8px 0 8px 24px;margin:32px 0;font-weight:400;font-style:italic;
}
blockquote.pull cite{display:block;font-family:'Inter',sans-serif;font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.13em;color:var(--ink-3);font-style:normal;margin-top:14px}

/* tag */
.tag{display:inline-block;background:var(--purple-soft);color:var(--purple-deep);padding:2px 9px;font-size:.74rem;font-weight:500;font-family:'JetBrains Mono',monospace;margin-right:6px;vertical-align:1px}
.tag.brass{background:var(--brass-soft);color:#5e4515}
.tag.euc{background:var(--euc-soft);color:#2e4730}

/* page nav (prev/next at bottom of page) */
.page-nav{
  display:flex;justify-content:space-between;gap:24px;
  padding:48px 0;border-top:1px solid var(--rule);margin-top:48px;flex-wrap:wrap;
}
.page-nav a{
  flex:1;min-width:240px;padding:24px 26px;background:var(--card);border:1px solid var(--rule);
  display:flex;flex-direction:column;gap:6px;color:var(--ink);transition:border-color .15s;
}
.page-nav a:hover{border-color:var(--purple);border-bottom:1px solid var(--purple)}
.page-nav .lbl{font-size:.74rem;color:var(--ink-3);text-transform:uppercase;letter-spacing:.1em;font-weight:600}
.page-nav .ti{font-family:'Fraunces',serif;font-size:1.15rem;font-weight:500;color:var(--purple)}
.page-nav .next{text-align:right}

/* utility */
.muted{color:var(--ink-2)}
.center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}
.mt-2{margin-top:2em}
.mb-2{margin-bottom:2em}

/* print */
@media print{
  .site-header,.site-nav,.subnav,.crumbs,.edition-strip,.page-nav,.site-footer .legal{display:none}
  body{background:#fff;color:#000;font-size:11pt}
  .section,.page-header{padding:12pt 0}
  .card,.callout,.spec-table,.diagram{page-break-inside:avoid}
  a[href]:after{content:" (" attr(href) ")";font-size:.85em;color:#666}
  a[href^="#"]:after,a[href^="javascript:"]:after{content:""}
  details{display:block!important}
  details>summary{font-weight:bold}
  details:not([open])>*:not(summary){display:block!important}
}