@import url("fonts.css");

/* ---------------------------------------------------------------------------
   TechViking AS
   Light theme only, on purpose. Hairlines and tables instead of cards.
   Palette: cold paper, charcoal ink, one warm signal colour (oxidised copper).
   --------------------------------------------------------------------------- */

:root {
  color-scheme: light;

  --paper:      #f2f1ec;
  --paper-2:    #eae8e1;
  --paper-3:    #e2e0d7;
  --ink:        #15181a;
  --ink-2:      #4b5154;
  --ink-3:      #63686b;

  --rule:       #d8d6cc;
  --rule-2:     #c3c0b3;

  --signal:     #9c4520;
  --signal-2:   #7a3417;
  --signal-pale:#e4d8cf;

  --dark:       #15181a;
  --dark-2:     #1d2224;
  --dark-rule:  #2f3538;
  --dark-ink:   #dedcd4;
  --dark-ink-2: #9ba0a1;

  --sans: "Familjen Grotesk", "Helvetica Neue", Helvetica, sans-serif;
  --serif: "Spectral", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --gutter: clamp(20px, 4vw, 44px);
  --rail: 156px;
  --ease: cubic-bezier(.2, .6, .2, 1);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.62 var(--serif);
  font-variant-numeric: oldstyle-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--signal); color: var(--paper); }

/* --- shared primitives ---------------------------------------------------- */

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.row {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 0 48px;
}

.rail {
  margin: 0;
  font: 500 12px/1.5 var(--mono);
  letter-spacing: 0;
  color: var(--ink-2);
  padding-top: 6px;
}
.rail::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--signal);
  margin-bottom: 12px;
}
.rail span {
  display: block;
  color: var(--ink-3);
  margin-top: 6px;
}

section { padding: clamp(52px, 7vw, 96px) 0; }
section + section { border-top: 1px solid var(--rule); }

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 500;
  font-variant-numeric: lining-nums;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(33px, 5.1vw, 55px);
  line-height: 1.04;
  letter-spacing: -.022em;
}

h2 {
  font-size: clamp(23px, 2.9vw, 31px);
  line-height: 1.16;
  letter-spacing: -.016em;
  max-width: 22ch;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.008em;
}

p { margin: 0 0 1.05em; max-width: 68ch; }
p:last-child { margin-bottom: 0; }

a { color: inherit; }

.prose a,
a.txt {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--signal-pale);
  transition: text-decoration-color .18s var(--ease), color .18s var(--ease);
}
.prose a:hover,
a.txt:hover { color: var(--signal); text-decoration-color: var(--signal); }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 1px;
}

.lede {
  font-size: 19.5px;
  line-height: 1.55;
  max-width: 44ch;
  color: var(--ink-2);
}

.note {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-3);
  max-width: 74ch;
}
.note sup { color: var(--signal); font-family: var(--mono); font-size: 10px; }

sup.fn {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--signal);
  vertical-align: super;
  line-height: 0;
  margin-left: 1px;
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums lining-nums; }

/* --- buttons -------------------------------------------------------------- */

.btn {
  display: inline-block;
  font: 500 15px/1 var(--sans);
  letter-spacing: -.005em;
  padding: 13px 20px 14px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover { background: var(--signal); border-color: var(--signal); }
.btn:active { background: var(--signal-2); border-color: var(--signal-2); }

.btn-quiet {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-2);
}
.btn-quiet:hover { background: transparent; color: var(--signal); border-color: var(--signal); }

/* --- masthead ------------------------------------------------------------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.masthead-in {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font: 600 17.5px/1 var(--sans);
  letter-spacing: -.02em;
  color: var(--ink);
  flex: none;
}
.brand svg { display: block; color: var(--ink); }
.brand:hover svg { color: var(--signal); }
.brand b { font-weight: 600; }
.brand i {
  font: 400 11px/1 var(--mono);
  font-style: normal;
  color: var(--ink-3);
  letter-spacing: .02em;
  align-self: flex-end;
  padding-bottom: 1px;
}

.mainnav {
  display: flex;
  gap: 26px;
  font: 400 15px/1 var(--sans);
  margin-right: auto;
}
.mainnav a {
  text-decoration: none;
  color: var(--ink-2);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.mainnav a:hover { color: var(--ink); border-bottom-color: var(--signal); }
.mainnav a[aria-current] { color: var(--ink); border-bottom-color: var(--rule-2); }

.masthead-end {
  display: flex;
  align-items: center;
  gap: 20px;
  font: 400 12.5px/1 var(--mono);
  color: var(--ink-3);
  flex: none;
}
.clock { font-variant-numeric: tabular-nums; }
.clock b { font-weight: 400; color: var(--ink-2); }

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  color: var(--ink-3);
}
.status:hover { color: var(--ink); }
.status::before {
  content: "";
  width: 7px;
  height: 7px;
  background: #3f7a4f;
  flex: none;
}

.navtoggle { display: none; }

/* --- opening -------------------------------------------------------------- */

.opening { padding-top: clamp(52px, 8vw, 104px); }

.opening h1 { max-width: 17ch; }

.opening-body {
  display: grid;
  grid-template-columns: minmax(0, 44ch) auto;
  align-items: end;
  gap: 32px 56px;
  margin-top: clamp(28px, 4vw, 44px);
  max-width: 860px;
}

.actions { display: flex; gap: 12px; align-items: center; flex: none; }

.facts {
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font: 400 12.5px/1.9 var(--mono);
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
  list-style: none;
}
.facts li b { font-weight: 500; color: var(--ink-2); }

/* --- tables --------------------------------------------------------------- */

.tbl-scroll { overflow-x: auto; margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter); }

table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 15px;
  font-variant-numeric: tabular-nums lining-nums;
}

thead th {
  font: 500 11.5px/1.4 var(--mono);
  color: var(--ink-3);
  text-align: left;
  padding: 0 18px 9px 0;
  border-bottom: 1px solid var(--rule-2);
  white-space: nowrap;
  vertical-align: bottom;
}

tbody td, tbody th {
  text-align: left;
  font-weight: 400;
  padding: 12px 18px 12px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: baseline;
}
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody th { font-family: var(--mono); font-size: 13.5px; white-space: nowrap; }
td.n { font-family: var(--mono); font-size: 13.5px; white-space: nowrap; }
td.dim, th.dim { color: var(--ink-3); }

tbody tr.planned th, tbody tr.planned td { color: var(--ink-3); }

.tag {
  font: 400 11px/1 var(--mono);
  color: var(--ink-3);
  border: 1px solid var(--rule-2);
  padding: 3px 6px 4px;
  white-space: nowrap;
}
.tag.on { color: var(--signal); border-color: var(--signal-pale); }

/* --- definition list (capabilities) --------------------------------------- */

.deflist { margin: 0; }
.deflist > div {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: 4px 40px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}
.deflist > div:first-child { border-top: 1px solid var(--rule-2); }
.deflist dt {
  font: 600 16px/1.4 var(--sans);
  letter-spacing: -.008em;
}
.deflist dt em {
  display: block;
  font: 400 12px/1.5 var(--mono);
  font-style: normal;
  color: var(--ink-3);
  margin-top: 3px;
}
.deflist dd {
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.58;
  max-width: 62ch;
}

/* --- ornament ------------------------------------------------------------- */

.ornament { display: block; width: 100%; height: 26px; color: var(--rule-2); }

.tendril {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 132px;
  height: auto;
  color: var(--signal);
  opacity: .16;
  pointer-events: none;
}

/* --- dark band (endpoints) ------------------------------------------------ */

.band-dark {
  background: var(--dark);
  color: var(--dark-ink);
  border-top: 1px solid var(--rule);
}
.band-dark h2 { color: #f0eee6; }
.band-dark .rail { color: var(--dark-ink-2); }
.band-dark .rail span { color: #7d8486; }
.band-dark .note { color: var(--dark-ink-2); }
.band-dark p { color: var(--dark-ink); }
.band-dark thead th { color: var(--dark-ink-2); border-bottom-color: var(--dark-rule); }
.band-dark td.dim, .band-dark th.dim { color: var(--dark-ink-2); }
.band-dark tbody td, .band-dark tbody th { border-bottom-color: var(--dark-rule); }
.band-dark a.txt { text-decoration-color: #5c4634; }
.band-dark a.txt:hover { color: #e08a5a; text-decoration-color: #e08a5a; }
.band-dark :focus-visible { outline-color: #e08a5a; }

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--dark-rule);
  margin-bottom: 0;
  overflow-x: auto;
}
.tabs button {
  appearance: none;
  background: none;
  text-align: left;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  color: var(--dark-ink-2);
  font: 400 13px/1 var(--mono);
  padding: 11px 15px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.tabs button:first-child { padding-left: 0; }
.tabs button:hover { color: var(--dark-ink); }
.tabs button[aria-selected="true"] { color: #f0eee6; border-bottom-color: var(--signal); }

.snippet { position: relative; }
.snippet pre {
  margin: 0;
  padding: 22px 0 24px;
  overflow-x: auto;
  font: 400 13.5px/1.75 var(--mono);
  color: var(--dark-ink);
  tab-size: 2;
}
.snippet pre .c { color: #7f8689; }
.snippet pre .s { color: #c8b48f; }
.snippet pre .k { color: #d78a5e; }

.copy {
  position: absolute;
  top: 18px;
  right: 0;
  appearance: none;
  background: var(--dark-2);
  border: 1px solid var(--dark-rule);
  border-radius: 2px;
  color: var(--dark-ink-2);
  font: 400 11.5px/1 var(--mono);
  padding: 7px 10px;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.copy:hover { color: var(--dark-ink); border-color: #4a5254; }

/* --- calculator ----------------------------------------------------------- */

.calc {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  font: 400 13.5px/1 var(--mono);
  color: var(--ink-3);
  margin: 0 0 22px;
}
.calc input {
  font: 400 14px/1 var(--mono);
  width: 9ch;
  padding: 8px 9px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule-2);
  border-radius: 2px;
}
.calc input:hover { border-color: var(--ink-3); }
.calc input:focus-visible { border-color: var(--signal); outline-offset: 1px; }

/* --- two column prose ----------------------------------------------------- */

.cols { columns: 2; column-gap: 48px; max-width: 74ch; }
.cols p { max-width: none; break-inside: avoid; }
.cols p:first-child { margin-top: 0; }

.gloss { color: var(--ink-3); }

blockquote {
  margin: 0;
  font: italic 400 20px/1.5 var(--serif);
  max-width: 46ch;
  color: var(--ink);
}
blockquote + .byline {
  margin-top: 14px;
  font: 400 13px/1.5 var(--mono);
  color: var(--ink-3);
}

/* --- closing -------------------------------------------------------------- */

.closing .actions { margin-top: 26px; }

/* --- footer --------------------------------------------------------------- */

.foot {
  position: relative;
  border-top: 1px solid var(--rule-2);
  background: var(--paper-2);
  padding: clamp(44px, 5vw, 64px) 0 0;
  overflow: hidden;
}

.foot-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 36px 40px;
}

.foot h4 {
  font: 500 12px/1.5 var(--mono);
  color: var(--ink-3);
  margin: 0 0 14px;
}
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin-bottom: 8px; }
.foot li a {
  font: 400 14.5px/1.5 var(--sans);
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.foot li a:hover { color: var(--signal); border-bottom-color: var(--signal-pale); }

.foot-id { font: 400 14px/1.72 var(--serif); color: var(--ink-2); max-width: 30ch; }
.foot-id b { font-weight: 600; color: var(--ink); }
.foot-id .mono { font-size: 12.5px; color: var(--ink-3); display: block; margin-top: 10px; }

.foot-legal {
  margin-top: clamp(40px, 5vw, 60px);
  border-top: 1px solid var(--rule);
  padding: 16px 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 26px;
  font: 400 12px/1.7 var(--mono);
  color: var(--ink-3);
}
.foot-legal a { color: var(--ink-3); text-decoration: none; border-bottom: 1px solid var(--rule-2); }
.foot-legal a:hover { color: var(--signal); border-bottom-color: var(--signal); }
.foot-legal .push { margin-left: auto; }

/* --- content pages -------------------------------------------------------- */

.page-head { padding: clamp(44px, 6vw, 76px) 0 clamp(40px, 5vw, 64px); }
.page-head h1 { font-size: clamp(29px, 4.2vw, 43px); max-width: 20ch; }
.page-head .lede { margin-top: 20px; }

.prose { max-width: 68ch; }
.prose h2 { margin: 2.1em 0 .55em; max-width: 26ch; }
.prose h3 { margin: 1.9em 0 .4em; }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose ul, .prose ol { margin: 0 0 1.05em; padding-left: 1.2em; }
.prose li { margin-bottom: .35em; }
.prose code {
  font: 400 .87em/1.5 var(--mono);
  background: var(--paper-3);
  padding: 1px 4px 2px;
  border-radius: 2px;
}
.prose pre {
  background: var(--dark);
  color: var(--dark-ink);
  padding: 18px 20px;
  border-radius: 2px;
  overflow-x: auto;
  font: 400 13px/1.7 var(--mono);
}
.prose pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.4em 0; }

.log { margin: 0; }
.log > div {
  display: grid;
  grid-template-columns: minmax(0, 11rem) minmax(0, 1fr);
  gap: 6px 40px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.log > div:first-child { border-top: 1px solid var(--rule-2); }
.log dt { font: 400 13px/1.6 var(--mono); color: var(--ink-3); }
.log dt b { display: block; color: var(--ink); font-weight: 500; }
.log dd { margin: 0; max-width: 62ch; }
.log dd h3 { margin-bottom: .3em; }
.log dd p { font-size: 16px; color: var(--ink-2); }

/* --- 404 ------------------------------------------------------------------ */

.gap {
  padding: clamp(70px, 12vw, 150px) 0;
  text-align: left;
}
.gap .code { font: 400 13px/1 var(--mono); color: var(--signal); margin-bottom: 22px; }

/* --- entrance ------------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .stagger > * {
    opacity: 0;
    transform: translateY(9px);
    animation: rise .5s var(--ease) forwards;
  }
  .stagger > :nth-child(1) { animation-delay: .02s; }
  .stagger > :nth-child(2) { animation-delay: .09s; }
  .stagger > :nth-child(3) { animation-delay: .16s; }
  .stagger > :nth-child(4) { animation-delay: .23s; }
}
@keyframes rise { to { opacity: 1; transform: none; } }

/* --- responsive ----------------------------------------------------------- */

@media (max-width: 1000px) {
  :root { --rail: 128px; }
  .row { gap: 0 32px; }
  .foot-cols { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .masthead-in { height: 60px; gap: 16px; }
  .mainnav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    z-index: 20;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 4px var(--gutter) 18px;
  }
  .mainnav[hidden] { display: none; }
  .mainnav a { padding: 11px 0; border-bottom: 1px solid var(--rule); font-size: 17px; }
  .mainnav a:last-child { border-bottom: 0; }
  .masthead { position: relative; }
  .navtoggle {
    display: block;
    order: 3;
    appearance: none;
    background: none;
    border: 1px solid var(--rule-2);
    border-radius: 2px;
    color: var(--ink-2);
    font: 400 12.5px/1 var(--mono);
    padding: 9px 11px;
    cursor: pointer;
  }
  .masthead-end { margin-left: auto; }
  .clock { display: none; }

  .row { grid-template-columns: minmax(0, 1fr); gap: 18px 0; }
  .rail { padding-top: 0; }
  .rail::before { margin-bottom: 9px; }
  .rail span { display: inline; margin-left: 10px; }

  .opening-body { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .actions { flex-wrap: wrap; }
  .deflist > div { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .log > div { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .cols { columns: 1; }
  .foot-cols { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .foot-legal .push { margin-left: 0; }
  .tendril { width: 96px; opacity: .12; }
}

@media (max-width: 520px) {
  body { font-size: 16.5px; }
  .lede { font-size: 18px; }
  .facts { gap: 2px 16px; font-size: 11.5px; }
  .brand i { display: none; }
}

@media print {
  .masthead-end, .navtoggle, .tendril, .ornament { display: none; }
  body { background: #fff; font-size: 11pt; }
}