/* dagron.dev/docs — shared stylesheet for the documentation pages.
   Same world as ../index.html (see ../../DESIGN.md): a rail-concourse
   split-flap board. Tokens are copied verbatim from the landing page;
   the docs add a manifest sidebar and article typography, nothing else.
   No new colors, no glows — lamps are the only colored light. */

:root{
  --hall:#0e1013;        /* the hall behind the board                     */
  --steel:#2a2e34;       /* brushed board frame                           */
  --steel-hi:#3d434b;    /* frame highlight / rules                       */
  --steel-lo:#1d2126;    /* frame shadow, recessed channels               */
  --flap:#131519;        /* matte flap face, lower half                   */
  --flap-hi:#1c1f25;     /* flap upper half, catching the hall light      */
  --paint:#f2efe6;       /* paint white — the letters                     */
  --paint-2:#cbc7bd;     /* second-rank paint                             */
  --paint-dim:#a8a49a;   /* weathered paint. 7.4:1 on flap, 5.0:1 on steel */
  --amber:#f5a623;       /* delay lamp                                    */
  --amber-hi:#ffc766;
  --red:#e0645a;         /* cancelled row. 5.3:1 on flap                  */
  --maxw:1180px;
  --nar:"Archivo Narrow","Arial Narrow",Helvetica,Arial,sans-serif;
  --sans:Archivo,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--hall);color:var(--paint);font-family:var(--sans);
  font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
img{max-width:100%}

body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(120% 70% at 50% -10%,rgba(245,166,35,.07),transparent 62%),
    radial-gradient(90% 60% at 50% 0%,rgba(120,140,170,.05),transparent 70%)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* -------------------------------------------------------------- header */
.skip{position:fixed;left:16px;top:-56px;z-index:200;background:var(--amber);color:#1b1204;
  font:600 14px var(--sans);padding:10px 15px;border-radius:4px;transition:top .18s ease-out}
.skip:focus-visible{top:12px}

header.gantry{position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,#2f343b,#20242a);
  border-bottom:1px solid #101317;
  box-shadow:0 10px 24px -18px rgba(0,0,0,.9)}
.gantry-in{display:flex;align-items:center;gap:26px;height:58px}
.brand{display:flex;align-items:center;gap:10px;font:700 20px/1 var(--nar);
  letter-spacing:.02em;color:var(--paint)}
.brand img{width:26px;height:26px}
.brand .crumb{color:var(--paint-dim);font-weight:600}
.gantry nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.gantry nav a{font:600 12.5px/1 var(--nar);letter-spacing:.13em;text-transform:uppercase;
  color:var(--paint-dim);padding:6px 0;border-bottom:2px solid transparent}
.gantry nav a:hover{color:var(--paint);border-bottom-color:var(--amber)}
.gantry nav a[aria-current="page"]{color:var(--paint);border-bottom-color:var(--amber)}
@media(max-width:900px){.gantry nav{display:none}}

/* a lit annunciator lamp — the board's only source of color */
.lamp{display:inline-flex;align-items:center;gap:7px;font:600 11px/1 var(--nar);
  letter-spacing:.14em;text-transform:uppercase;color:var(--paint-dim)}
.lamp::before{content:"";width:7px;height:7px;border-radius:50%;
  background:var(--amber);box-shadow:0 0 7px 1px rgba(245,166,35,.55)}
.lamp.off::before{background:#3a4048;box-shadow:none}
.lamp.red::before{background:var(--red);box-shadow:0 0 7px 1px rgba(224,100,90,.5)}

/* ------------------------------------------------------------- buttons */
.btn{display:inline-flex;align-items:center;gap:9px;
  font:700 13px/1 var(--nar);letter-spacing:.13em;text-transform:uppercase;
  padding:14px 22px;border-radius:3px;border:1px solid;cursor:pointer;
  transition:background .14s ease-out,color .14s ease-out,border-color .14s ease-out}
.btn-amber{background:var(--amber);border-color:#c9820f;color:#1b1204;
  box-shadow:0 1px 0 rgba(255,255,255,.35) inset,0 6px 14px -9px rgba(0,0,0,.85)}
.btn-amber:hover{background:var(--amber-hi)}
.btn-steel{background:linear-gradient(180deg,#333941,#242930);border-color:#14171b;color:var(--paint);
  box-shadow:0 1px 0 rgba(255,255,255,.07) inset}
.btn-steel:hover{border-color:var(--amber);color:var(--amber-hi)}

/* ---------------------------------------------------------------- type */
h1,h2,h3,h4{margin:0;font-family:var(--nar);font-weight:700;line-height:1.12;
  letter-spacing:-.005em}
h1{font-size:clamp(30px,4.4vw,52px);text-transform:uppercase}
p{margin:0}
.lead{font-size:clamp(16px,1.4vw,18.5px);color:var(--paint-2);max-width:70ch;line-height:1.62}
.kicker{display:inline-block;font:600 11.5px/1 var(--nar);letter-spacing:.2em;
  text-transform:uppercase;color:var(--amber)}
.ee-tag{display:inline-block;font:700 9.5px/1 var(--nar);letter-spacing:.12em;
  text-transform:uppercase;color:var(--amber);border:1px solid rgba(245,166,35,.45);
  border-radius:2px;padding:3px 5px;vertical-align:1px;margin-left:3px}
.mono{font-family:var(--mono);font-size:.9em;color:var(--paint-2)}

/* -------------------------------------------------------------- layout
   A manifest column beside the article: the sidebar is the departures list
   for the documentation, the article is the posted notice being read. */
.docs{display:grid;grid-template-columns:236px minmax(0,1fr);gap:44px;
  padding:40px 0 64px;align-items:start}
@media(max-width:880px){.docs{grid-template-columns:1fr;gap:28px;padding-top:26px}}

.side{position:sticky;top:82px}
@media(max-width:880px){.side{position:static}}
.side h4{font:600 10.5px/1 var(--nar);letter-spacing:.18em;text-transform:uppercase;
  color:var(--paint-dim);margin:22px 0 8px;padding:0 2px}
.side h4:first-child{margin-top:0}
.side a{display:flex;align-items:center;gap:8px;padding:8px 10px;border-left:2px solid #1c2026;
  font:600 13.5px/1.3 var(--nar);letter-spacing:.05em;color:var(--paint-dim);
  transition:color .14s ease-out,border-color .14s ease-out}
.side a:hover{color:var(--paint);border-left-color:var(--steel-hi)}
.side a[aria-current="page"]{color:var(--amber);border-left-color:var(--amber)}

/* ------------------------------------------------------------- article */
article.doc{min-width:0;max-width:78ch}
.doc-head{margin-bottom:34px}
.doc-head h1{margin:14px 0 14px}
.doc-head .lead{margin-bottom:0}

/* Section rules, not cards: a ruled board. More space above a heading than
   below it, so a heading belongs to what follows. */
article.doc h2{font-size:clamp(22px,2.6vw,30px);text-transform:uppercase;
  margin:52px 0 14px;padding-top:26px;border-top:1px solid var(--steel-hi)}
article.doc h3{font-size:18px;margin:32px 0 10px}
article.doc h4{font:600 12px/1.4 var(--nar);letter-spacing:.14em;text-transform:uppercase;
  color:var(--paint-dim);margin:24px 0 8px}
article.doc p{color:var(--paint-2);margin:0 0 14px;max-width:76ch}
article.doc p.dim,article.doc .dim{color:var(--paint-dim)}
article.doc ul,article.doc ol{margin:0 0 16px;padding-left:0;list-style:none;
  display:flex;flex-direction:column;gap:9px}
article.doc ol{counter-reset:step}
article.doc li{color:var(--paint-2);font-size:15px;line-height:1.6;
  padding-left:18px;position:relative}
article.doc ul li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;
  background:var(--steel-hi)}
article.doc ol li{padding-left:30px}
article.doc ol li::before{counter-increment:step;content:counter(step);
  position:absolute;left:0;top:.18em;width:20px;height:20px;display:grid;place-items:center;
  font:700 11px/1 var(--nar);color:var(--amber);border:1px solid var(--steel-hi);
  border-radius:2px;background:var(--flap)}
article.doc li b,article.doc li strong{color:var(--paint);font-weight:600}
article.doc a{color:var(--amber);border-bottom:1px solid rgba(245,166,35,.35)}
article.doc a:hover{color:var(--amber-hi)}
article.doc a.head-link{color:inherit;border-bottom:none}
article.doc code{font-family:var(--mono);font-size:13px;background:var(--flap);
  padding:2px 6px;border-radius:2px;color:var(--amber);overflow-wrap:break-word}
article.doc pre code{background:none;padding:0;color:inherit;font-size:inherit}

/* Recessed code panels — inset shadow, neutral border, no accent stripe.
   (The flap seam belongs on single-line cells only; it would rule a black
   line through a listing.) */
.panel{border:1px solid #1c2026;border-radius:5px;overflow:hidden;background:var(--flap);
  margin:0 0 18px;min-width:0}
.panel-h{padding:10px 15px;border-bottom:1px solid #1c2026;
  background:linear-gradient(180deg,#2b3037,#20242a);
  font:600 11px/1 var(--nar);letter-spacing:.16em;text-transform:uppercase;color:var(--paint-dim)}
.panel pre{margin:0;padding:15px 17px;font:13px/1.78 var(--mono);color:var(--paint-2);
  overflow-x:auto;scrollbar-width:thin}
.panel .c{color:#7d8792} .panel .k{color:var(--amber)}
.panel .g{color:var(--amber)} .panel .b{color:#8fb8e8}

/* posted notice: a steel strip for warnings and operational notes */
.notice{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;
  border:1px solid var(--steel-hi);border-radius:4px;padding:14px 16px;margin:0 0 18px;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.012) 0 1px,transparent 1px 3px),
    linear-gradient(180deg,#282d34,#1a1e23)}
.notice .lamp{padding-top:3px}
.notice p{margin:0;color:var(--paint-2);font-size:14.5px}
.notice p+p{margin-top:8px}
.notice b{color:var(--paint)}

/* --------------------------------------------------------- ref tables */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 18px;
  scrollbar-width:thin;scrollbar-color:#3d434b transparent}
.tbl-wrap:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
table.ref{width:100%;min-width:520px;border-collapse:collapse;font-size:14px}
table.ref th,table.ref td{padding:10px 14px;text-align:left;border-bottom:1px solid #1c2026;
  vertical-align:top}
table.ref thead th{font:600 11px/1 var(--nar);letter-spacing:.16em;text-transform:uppercase;
  color:var(--paint-dim);border-bottom:1px solid var(--steel-hi)}
table.ref tbody tr:hover td{background:rgba(255,255,255,.018)}
table.ref td:first-child{color:var(--paint-2);font-family:var(--mono);font-size:13px;
  white-space:nowrap}
table.ref td{color:var(--paint-dim)}
table.ref td b{color:var(--paint);font-weight:600}
table.ref code{white-space:nowrap}

/* hub index: ruled manifest rows, never a grid of identical cards */
.manifest{border-top:1px solid var(--steel-hi)}
.mrow{display:grid;grid-template-columns:170px 1fr;gap:26px;
  padding:22px 4px;border-bottom:1px solid #1c2026;align-items:start;
  transition:background .16s ease-out}
.mrow:hover{background:rgba(255,255,255,.017)}
.mrow .row-k{font:700 12px/1.5 var(--nar);letter-spacing:.15em;text-transform:uppercase;
  color:var(--amber);padding-top:3px}
.mrow h3{margin:0 0 6px;font-size:19px}
.mrow p{color:var(--paint-dim);margin:0;max-width:78ch}
a.mrow{border-bottom:1px solid #1c2026}
a.mrow h3{color:var(--paint)}
a.mrow:hover h3{color:var(--amber-hi)}
@media(max-width:700px){
  .mrow{grid-template-columns:1fr;gap:8px}
  .mrow .row-k{padding-top:0}
}

/* pager: previous / next plates at the article foot */
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:52px;
  padding-top:22px;border-top:1px solid var(--steel-hi);flex-wrap:wrap}
.pager a{border-bottom:none}

/* ------------------------------------------------------------- footer */
footer{border-top:1px solid var(--steel-hi);padding:52px 0 36px;margin-top:36px;
  background:linear-gradient(180deg,transparent,rgba(0,0,0,.35))}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:26px}
@media(max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}}
footer h4{font:600 11px/1 var(--nar);letter-spacing:.17em;text-transform:uppercase;
  color:var(--paint-dim);margin:0 0 15px}
footer a{display:block;color:var(--paint-2);font-size:14.5px;padding:4px 0}
footer a:hover{color:var(--amber)}
.foot-brand p{max-width:36ch;font-size:14px;color:var(--paint-dim);margin:12px 0 0}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:38px;
  padding-top:20px;border-top:1px solid #1c2026;font-size:13px;color:var(--paint-dim);
  flex-wrap:wrap;gap:10px}
.foot-bottom .mono{font-size:12.5px}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;scroll-behavior:auto !important}
}