/* =========================================================
   DETA — operator spec sheet
   IBM Plex Sans + IBM Plex Mono · flat colors · hairline rules
   ========================================================= */

:root {
  --paper: #f1efe9;
  --ink: #151514;
  --muted: #5f5d57;
  --rule: #d2cfc6;
  --rule-strong: #151514;
  --accent: #c2410c;

  --sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1240px;
  --pad: clamp(20px, 4vw, 48px);
  --gap: clamp(16px, 2vw, 28px);
  --bar-h: 52px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    --paper: #121211; --ink: #e8e6e0; --muted: #9b988f; --rule: #2d2c29; --rule-strong: #e8e6e0; --accent: #ff7a3d;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #121211; --ink: #e8e6e0; --muted: #9b988f; --rule: #2d2c29; --rule-strong: #e8e6e0; --accent: #ff7a3d;
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--bar-h) + 12px); }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  transition: background-color .3s, color .3s;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, p, figure, dl, dd, table { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
::selection { background: var(--accent); color: var(--paper); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--pad); }
.skip-link { position: absolute; left: 12px; top: -40px; z-index: 10; padding: 6px 10px; background: var(--ink); color: var(--paper); font: 500 13px var(--mono); }
.skip-link:focus { top: 8px; }

/* underline that draws in from the left */
.u, .bar__nav a, .bar__id { position: relative; }
.bar__nav a::after, .bar__id::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform .25s ease-out;
}
.bar__nav a:hover::after, .bar__nav a.is-active::after, .bar__id:hover::after { transform: scaleX(1); }

/* ---------- Top bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 5; height: var(--bar-h);
  background: var(--paper); border-bottom: 1px solid var(--rule);
  font: 400 13px/1 var(--mono); letter-spacing: .01em;
  transition: background-color .3s;
}
.bar__inner { height: 100%; display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap); align-items: center; }
.bar__id { grid-column: 1 / span 3; justify-self: start; font-weight: 500; }
.bar__slash { color: var(--muted); margin: 0 .35em; }
.bar__sub { color: var(--muted); font-weight: 400; }
.bar__nav { grid-column: 4 / span 6; display: flex; gap: 28px; }
.bar__nav a { color: var(--muted); transition: color .2s; }
.bar__nav a:hover, .bar__nav a.is-active { color: var(--ink); }
.bar__ctl { grid-column: 10 / span 3; justify-self: end; display: flex; gap: 14px; }
.ctl { color: var(--muted); font: inherit; transition: color .2s; }
.ctl:hover { color: var(--ink); }
.ctl span { color: var(--ink); }

/* ---------- Head ---------- */
.head {
  position: relative;
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap); row-gap: 40px;
  padding-top: clamp(48px, 8vw, 112px); padding-bottom: clamp(56px, 8vw, 112px);
  align-items: end;
}
.head__main { grid-column: 1 / span 8; }
.head__name {
  font-weight: 700; font-size: clamp(96px, 17vw, 236px); line-height: .8; letter-spacing: -.055em;
  margin-left: -.04em;
}
.head__lead {
  margin-top: clamp(28px, 4vw, 48px); max-width: 23ch;
  font-size: clamp(24px, 2.6vw, 34px); line-height: 1.22; letter-spacing: -.015em; font-weight: 400;
}
.head__side { grid-column: 9 / span 4; }
.head__avatar {
  width: 112px; height: 112px; object-fit: cover; margin-bottom: 20px;
  filter: grayscale(1) contrast(1.05); transition: filter .4s;
}
.head__avatar:hover { filter: none; }

.meta { font: 400 13px/1.45 var(--mono); border-top: 1px solid var(--rule-strong); }
.meta__row { display: grid; grid-template-columns: 9.5em 1fr; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--rule); }
.meta dt { color: var(--muted); }
.meta dd { color: var(--ink); }

.status { display: inline-flex; align-items: center; gap: 8px; }
.status__dot { width: 7px; height: 7px; background: var(--accent); }
.caret { display: inline-block; width: .55em; height: 1.05em; margin-left: 1px; background: var(--ink); vertical-align: -2px; animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }


/* ---------- Rows ---------- */
.row {
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--gap);
  padding-top: 22px; padding-bottom: clamp(64px, 9vw, 120px);
  position: relative;
}
.row::before { content: ""; position: absolute; left: var(--pad); right: var(--pad); top: 0; height: 1px; background: var(--rule-strong); }
.row__label { grid-column: 1 / span 3; align-self: start; position: sticky; top: calc(var(--bar-h) + 22px); font: 500 13px/1.6 var(--mono); letter-spacing: .01em; }
.row__body { grid-column: 4 / span 9; }
.row__title { font-size: clamp(28px, 3.4vw, 44px); line-height: 1.1; letter-spacing: -.025em; font-weight: 600; margin-bottom: clamp(24px, 3vw, 36px); }

.about__p1 { font-size: clamp(19px, 1.7vw, 22px); line-height: 1.55; max-width: 40em; }
.about__p2 { margin-top: 20px; color: var(--muted); max-width: 44em; }

/* ---------- Ledger (focus table) ---------- */
.ledger { width: 100%; border-collapse: collapse; }
.ledger thead th {
  text-align: left; font: 400 12px/1 var(--mono); color: var(--muted);
  padding: 0 0 10px; border-bottom: 1px solid var(--rule-strong);
}
.ledger tbody th, .ledger tbody td { text-align: left; vertical-align: baseline; padding: 18px 0; border-bottom: 1px solid var(--rule); }
.ledger tbody th {
  width: 38%; padding-right: 24px; font-weight: 500; font-size: 19px; letter-spacing: -.01em;
  transition: color .2s, padding-left .25s ease-out, box-shadow .25s ease-out;
}
.ledger tbody td { color: var(--muted); }
.ledger tbody tr:hover th { color: var(--accent); padding-left: 12px; box-shadow: inset 2px 0 0 var(--accent); }

/* ---------- Contact ---------- */
.contact__lead { font-size: clamp(19px, 1.7vw, 22px); line-height: 1.5; max-width: 34em; }
.reach { margin-top: 28px; display: flex; align-items: center; gap: 16px; font-weight: 500; font-size: 19px; }
.reach__rule { flex: 1; max-width: 240px; height: 1px; background: var(--rule-strong); }
.reach__icon {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--rule-strong);
  transition: background-color .2s, color .2s;
}
.reach__icon:hover { background: var(--ink); color: var(--paper); }

/* ---------- Footer ---------- */
.foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-top: 16px; padding-bottom: calc(28px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--rule); font: 400 12px/1.5 var(--mono); color: var(--muted);
}

/* ---------- Motion (load + scroll) ---------- */
.js .step { opacity: 0; transform: translateY(8px); }
.js.is-loaded .step { opacity: 1; transform: none; transition: opacity .5s ease-out, transform .5s ease-out; transition-delay: calc(var(--s, 0) * 90ms); }
.js .reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s ease-out, transform .5s ease-out; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .head__main { grid-column: 1 / -1; }
  .head__side { grid-column: 1 / -1; display: grid; grid-template-columns: 112px 1fr; gap: 20px; align-items: start; }
  .head__avatar { margin: 0; }
  .row__label { grid-column: 1 / -1; margin-bottom: 18px; position: static; }
  .row__body { grid-column: 1 / -1; }
  .bar__nav { grid-column: 4 / span 5; }
  .bar__ctl { grid-column: 9 / span 4; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .bar__nav { display: none; }
  .bar__id { grid-column: 1 / span 7; }
  .bar__ctl { grid-column: 8 / span 5; }
  .head { row-gap: 32px; }
  .head__side { display: block; }
  .head__avatar { position: absolute; top: clamp(48px, 8vw, 112px); right: var(--pad); width: 68px; height: 68px; }
  .meta { font-size: 12.5px; }
  .meta__row { grid-template-columns: 9em 1fr; gap: 10px; }
  .ledger thead { display: none; }
  .ledger tbody tr { display: block; padding: 16px 0; border-bottom: 1px solid var(--rule); }
  .ledger tbody tr:first-child { border-top: 1px solid var(--rule-strong); }
  .ledger tbody th, .ledger tbody td { display: block; width: auto; padding: 0; border: 0; }
  .ledger tbody td { margin-top: 4px; }
  .ledger tbody tr:hover th { padding-left: 0; box-shadow: none; }
  .foot { flex-direction: column; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .step, .js .reveal { opacity: 1 !important; transform: none !important; }
}