/* ==========================================================================
   OpusMill — shared stylesheet
   Aesthetic: a machine shop's job traveler. Drafting-paper ground, steel
   greys, oxide-primer red for structure, machine amber for callouts.
   Type: Saira Condensed (display) / Source Serif 4 (body) / DM Mono (specs).
   ========================================================================== */

:root {
  /* --- surfaces --- */
  --paper:       #e6e8ea;
  --card:        #f7f8f9;
  --sunk:        #dcdfe2;

  /* --- ink --- */
  --ink:         #121517;
  --ink-2:       #474e54;
  --ink-3:       #79818a;

  /* --- rules --- */
  --rule:        #cbd0d4;
  --rule-firm:   #a9b0b7;

  /* --- accents --- */
  --oxide:       #a8412a;   /* structure: marks, links, section numbers */
  --oxide-deep:  #7e2f1e;
  --oxide-wash:  #f0ddd7;
  --amber:       #8a6a09;   /* callouts, status, measurements */
  --amber-fill:  #e9c85a;
  --amber-wash:  #f4ebd0;

  /* --- type --- */
  --display: "Saira Condensed", "Arial Narrow", sans-serif;
  --body:    "Source Serif 4", Georgia, serif;
  --mono:    "DM Mono", ui-monospace, "Cascadia Mono", monospace;

  /* --- metrics --- */
  --w:       1120px;
  --gutter:  clamp(20px, 5vw, 56px);
  --grid:    22px;         /* drafting-paper pitch */
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:      #131618;
    --card:       #1b1f22;
    --sunk:       #0e1113;
    --ink:        #e8ebed;
    --ink-2:      #adb5bb;
    --ink-3:      #7b848b;
    --rule:       #2b3135;
    --rule-firm:  #3e464b;
    --oxide:      #e08064;
    --oxide-deep: #f0a288;
    --oxide-wash: #331c15;
    --amber:      #e0b64f;
    --amber-fill: #a8830f;
    --amber-wash: #2e2612;
  }
}

:root[data-theme="dark"] {
  --paper:      #131618;
  --card:       #1b1f22;
  --sunk:       #0e1113;
  --ink:        #e8ebed;
  --ink-2:      #adb5bb;
  --ink-3:      #7b848b;
  --rule:       #2b3135;
  --rule-firm:  #3e464b;
  --oxide:      #e08064;
  --oxide-deep: #f0a288;
  --oxide-wash: #331c15;
  --amber:      #e0b64f;
  --amber-fill: #a8830f;
  --amber-wash: #2e2612;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  /* drafting paper: a fine grid, barely there */
  background-image:
    linear-gradient(to right,  var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
  background-position: -1px -1px;
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body { background-image: none; }
}
:root[data-theme="dark"] body { background-image: none; }

img { max-width: 100%; height: auto; }

/* --------------------------------------------------------------- skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 13px;
  z-index: 50;
}
.skip:focus { left: 0; }

/* ------------------------------------------------------------------ shell */
.shell {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.sheet {
  background: var(--card);
  border-left: 1px solid var(--rule-firm);
  border-right: 1px solid var(--rule-firm);
  max-width: var(--w);
  margin: 0 auto;
  min-height: 100vh;
}

/* ---------------------------------------------------------------- masthead */
.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  padding: 22px 0 18px;
  border-bottom: 3px double var(--ink);
}

.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.wordmark .mill { color: var(--oxide); }

.nav {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
}
.nav a {
  color: var(--ink-2);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav a:hover, .nav a:focus-visible { color: var(--oxide); border-bottom-color: var(--oxide); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--rule-firm); }

/* ------------------------------------------------------- traveler headline */
.traveler {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.traveler div {
  padding: 11px 14px 11px 0;
  border-right: 1px solid var(--rule);
}
.traveler div:last-child { border-right: 0; }
.traveler dt, .traveler .k {
  display: block;
  color: var(--ink-3);
  font-size: 10.5px;
  margin-bottom: 3px;
}
.traveler .v { color: var(--ink); }
.traveler .v.live { color: var(--amber); }

/* --------------------------------------------------------------------- hero */
.hero { padding: 46px 0 40px; border-bottom: 1px solid var(--rule); }

h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(40px, 7.5vw, 78px);
  line-height: .96;
  letter-spacing: -.005em;
  text-transform: uppercase;
  margin: 0 0 22px;
  text-wrap: balance;
  max-width: 15ch;
}
h1 .rule-through { color: var(--oxide); }

.standfirst {
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 56ch;
  margin: 0;
}

/* ------------------------------------------------------------------ section */
.op {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 0 40px;
  padding: 38px 0;
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 780px) {
  .op { grid-template-columns: 1fr; gap: 14px; }
}

.op-mark {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  line-height: 1.7;
}
.op-mark .no {
  display: block;
  font-family: var(--display);
  font-weight: 700;
  font-size: 34px;
  letter-spacing: 0;
  color: var(--oxide);
  line-height: 1;
  margin-bottom: 6px;
}

.op-body > *:first-child { margin-top: 0; }
.op-body > *:last-child  { margin-bottom: 0; }

h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 33px);
  line-height: 1.1;
  letter-spacing: .005em;
  text-transform: uppercase;
  margin: 0 0 16px;
  text-wrap: balance;
}

h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: .02em;
  text-transform: uppercase;
  margin: 26px 0 8px;
}

p { margin: 0 0 16px; max-width: 66ch; }

a { color: var(--oxide); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--oxide-deep); }
:focus-visible { outline: 2px solid var(--oxide); outline-offset: 3px; }

ul, ol { max-width: 66ch; padding-left: 22px; margin: 0 0 16px; }
li { margin-bottom: 8px; }
li::marker { color: var(--oxide); }

strong { font-weight: 600; }

/* ------------------------------------------------------------ spec listing */
.specs {
  border-top: 1px solid var(--rule-firm);
  margin: 4px 0 0;
}
.specs .row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px 24px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule);
}
.specs .name { font-weight: 600; }
.specs .desc {
  display: block;
  font-size: 15px;
  color: var(--ink-2);
  font-weight: 400;
  max-width: 52ch;
}
.specs .val {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  white-space: nowrap;
  letter-spacing: .03em;
  text-transform: uppercase;
}

/* -------------------------------------------------------------- status tag */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid currentColor;
  border-radius: 2px;
  white-space: nowrap;
}
.tag.cut   { color: var(--amber); background: var(--amber-wash); }
.tag.queue { color: var(--ink-3); }

/* ------------------------------------------------------------- fill marker */
.fill {
  background: var(--amber-fill);
  color: #201a04;
  font-family: var(--mono);
  font-size: .88em;
  padding: 1px 6px;
  border-radius: 2px;
  font-weight: 500;
}

/* ------------------------------------------------------------------ notice */
.notice {
  border: 1px solid var(--rule-firm);
  border-left: 4px solid var(--amber-fill);
  background: var(--paper);
  background-image: none;
  padding: 16px 20px;
  margin: 0 0 20px;
  font-size: 15.5px;
}
.notice p:last-child { margin-bottom: 0; }
.notice .lede {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: 6px;
}

/* ------------------------------------------------------------------ footer */
.foot {
  padding: 30px 0 44px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
  align-items: baseline;
}
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; }
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--oxide); text-decoration: underline; }

/* --------------------------------------------------------------- page load */
@keyframes lift {
  from { opacity: .35; transform: translateY(7px); }
  to   { opacity: 1;   transform: none; }
}
.hero > *, .traveler { animation: lift .5s cubic-bezier(.2,.7,.3,1) backwards; }
.traveler       { animation-delay: 0s; }
.hero h1        { animation-delay: .07s; }
.hero .standfirst { animation-delay: .14s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ------------------------------------------------------------- legal pages */
.legal { padding: 34px 0 10px; }
.legal h1 { font-size: clamp(32px, 5.5vw, 52px); max-width: 22ch; margin-bottom: 10px; }
.legal .updated {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 30px;
}
.legal section {
  padding: 26px 0;
  border-top: 1px solid var(--rule);
}
.legal section h2 { font-size: clamp(20px, 2.6vw, 25px); margin-bottom: 12px; }