/* Hallmark · genre: editorial · macrostructure: Long Document · theme: Newsprint
 * tone: technical / austere · anchor hue: warm 32° (ink red)
 * nav: N6 Newspaper masthead · footer: Ft4 Dense colophon · enrichment: none
 */

@import url("tokens.css");

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

html, body {
  overflow-x: clip;          /* clip, never hidden — gate 34 */
  margin: 0;
}

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

body {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
}

/* Fine grain — paper, not glass. Under 3% opacity. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-base);
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

:where(a) { color: inherit; }

::selection {
  background: var(--color-accent-wash);
  color: var(--color-ink);
}

:focus-visible {
  outline: var(--rule-firm) solid var(--color-focus);
  outline-offset: 3px;
  /* never transitioned — must appear instantly */
}

/* ------------------------------------------------------------ container -- */
.wrap {
  width: 100%;
  max-width: 74rem;
  margin-inline: auto;
  padding-inline: clamp(1.125rem, 4vw, 2.5rem);
}

.measure { max-width: 63ch; }

/* ------------------------------------------- N6 · newspaper masthead ----- */
.masthead {
  border-bottom: var(--rule-firm) solid var(--color-ink);
  padding-block: var(--space-lg) 0;
  position: relative;
  z-index: var(--z-raised);
}

.masthead__issue {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  padding-bottom: var(--space-sm);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.masthead__issue .sep { color: var(--color-rule-firm); }

.masthead__word {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-style: normal;                 /* roman — never italic display */
  font-size: var(--text-display-s);
  line-height: var(--leading-tight);
  letter-spacing: -0.022em;
  margin: var(--space-md) 0 var(--space-sm);
  text-decoration: none;
  overflow-wrap: anywhere;
  min-width: 0;
}

.masthead__word .dot { color: var(--color-accent); }

.masthead__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  padding-bottom: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule);
  padding-top: var(--space-sm);
}

.masthead__nav a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-ink-2);
  white-space: nowrap;               /* clickable text never wraps — gate 49 */
  padding-block: var(--space-2xs);
  border-bottom: var(--rule-firm) solid transparent;
  transition: color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}

.masthead__nav a:hover,
.masthead__nav a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ------------------------------------------------------------- article -- */
.doc { padding-block: var(--space-3xl) var(--space-2xl); }

.lede {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3.4vw, 2.125rem);
  line-height: 1.34;
  letter-spacing: -0.012em;
  max-width: 34ch;
  margin: 0 0 var(--space-xl);
  overflow-wrap: anywhere;
  min-width: 0;
}

.lede b {
  font-weight: 600;
  color: var(--color-accent);
}

.standfirst {
  max-width: 60ch;
  color: var(--color-ink-2);
  margin: 0 0 var(--space-2xl);
}

.doc p { margin: 0 0 var(--space-md); max-width: 63ch; }

.doc h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  font-size: var(--text-2xl);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: var(--space-3xl) 0 var(--space-md);
  padding-top: var(--space-md);
  border-top: var(--rule-hair) solid var(--color-rule);
  max-width: 63ch;
  overflow-wrap: anywhere;
  min-width: 0;
}

.doc h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  margin: var(--space-xl) 0 var(--space-sm);
}

.doc a:not(.btn) {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: text-decoration-thickness var(--dur-short) var(--ease-out);
}

.doc a:not(.btn):hover { text-decoration-thickness: 2px; }

.doc strong { font-weight: 600; }
.doc em { font-style: italic; }        /* body emphasis only */

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--color-paper-2);
  padding: 0.1em 0.26em;
  margin-inline: -0.04em;      /* keep the chip off following punctuation */
  border-radius: var(--radius-sm);
}

/* ------------------------------------------------------------- callout -- */
.finding {
  border-left: none;                   /* no side-stripe card */
  border-top: var(--rule-firm) solid var(--color-accent);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  background: var(--color-accent-wash);
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  margin: var(--space-xl) 0;
  max-width: 63ch;
}

.finding p:last-child { margin-bottom: 0; }

.finding__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

/* ------------------------------------------------- contrast: two-column -- */
.contrast {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
  max-width: 63ch;
}

.contrast > div { padding-top: var(--space-sm); border-top: var(--rule-hair) solid var(--color-rule-firm); }
.contrast dt { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.07em; color: var(--color-ink-3); }
.contrast dd { margin: var(--space-2xs) 0 var(--space-sm); font-size: var(--text-base); }
.contrast .no  { color: var(--color-ink-3); }
.contrast .yes { color: var(--color-accent); font-weight: 600; }

/* ------------------------------------- Tier-A CSS pipeline diagram ------ */
.pipe {
  margin: var(--space-xl) 0 var(--space-2xl);
  border-top: var(--rule-firm) solid var(--color-ink);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  padding-block: var(--space-lg);
}

.pipe__row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-md);
}

.pipe__stage { min-width: 0; }

.pipe__n {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.pipe__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  line-height: 1.15;
  margin: var(--space-2xs) 0 var(--space-xs);
  overflow-wrap: anywhere;
}

.pipe__body {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: 1.5;
  margin: 0;
}

.pipe__flow {
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  letter-spacing: 0.03em;
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: var(--space-2xs);
}

/* ---------------------------------------------------------------- table -- */
.tablewrap {
  overflow-x: auto;
  margin: var(--space-lg) 0 var(--space-md);
  border-top: var(--rule-firm) solid var(--color-ink);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  min-width: 34rem;
}

thead th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  text-align: left;
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule-firm);
  white-space: nowrap;
}

tbody td {
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule);
  vertical-align: baseline;
}

tbody tr:last-child td { border-bottom: none; }

td.num, th.num { text-align: right; padding-right: var(--space-md); font-family: var(--font-mono); }
td.name { font-family: var(--font-mono); white-space: nowrap; }
td.cat  { color: var(--color-ink-3); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.05em; }

/* Deltas are rendered in neutral ink on purpose. None of them survives the
 * family-wise correction, so colouring gains green would signal a significance
 * the data does not support. The sign is already in the number. */
.up, .down, .flat { color: var(--color-ink-2); }

.tnote {
  font-size: var(--text-sm);
  color: var(--color-ink-3);
  max-width: 63ch;
  margin: 0 0 var(--space-xl);
}

/* ---------------------------------------------------------------- lists -- */
.doc ul { max-width: 63ch; padding-left: 0; list-style: none; margin: 0 0 var(--space-lg); }

.doc ul li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.doc ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ----------------------------------------------------------------- pre --- */
.code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--color-paper-2);
  border-top: var(--rule-hair) solid var(--color-rule-firm);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  padding: var(--space-md);
  overflow-x: auto;
  line-height: 1.7;
  margin: var(--space-md) 0 var(--space-lg);
  max-width: 63ch;
}

.code .c { color: var(--color-ink-3); }
.code .k { color: var(--color-accent); }

/* --------------------------------------------- Ft4 · dense colophon ------ */
.colophon {
  margin-top: var(--space-3xl);
  border-top: var(--rule-firm) solid var(--color-ink);
  background: var(--color-paper-2);
  padding-block: var(--space-xl) var(--space-2xl);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.85;
  color: var(--color-ink-2);
}

.colophon__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  gap: var(--space-lg) var(--space-xl);
}

.colophon dt {
  color: var(--color-ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.6875rem;
}

.colophon dd { margin: 0 0 var(--space-sm); overflow-wrap: anywhere; }

.colophon a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.colophon__tail {
  margin-top: var(--space-xl);
  padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule-firm);
  color: var(--color-ink-3);
}

/* ----------------------------------------------------------- responsive -- */
@media (max-width: 60rem) {
  .pipe__row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg) var(--space-md); }
}

@media (max-width: 40rem) {
  body { font-size: var(--text-base); }
  .doc { padding-block: var(--space-2xl) var(--space-xl); }
  .pipe__row { grid-template-columns: minmax(0, 1fr); }
  .contrast { grid-template-columns: minmax(0, 1fr); gap: var(--space-md); }
  .masthead__nav { gap: var(--space-sm) var(--space-md); }
  .masthead__nav a { padding-block: var(--space-xs); }  /* 44px hit target */
  .doc h2 { margin-top: var(--space-2xl); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ------------------------------------------------------------ utility --- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}