/* ==========================================================================
   BASE. reset, typography primitives, layout primitives
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--tg-bone);
  color: var(--tg-ink);
  font-family: var(--tg-font-body);
  font-size: var(--tg-size-body);
  font-weight: var(--tg-wt-book);
  line-height: var(--tg-lh-body);
  letter-spacing: var(--tg-tr-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis-weight: none;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--tg-ink); color: var(--tg-bone); }
[data-surface="ink"] ::selection { background: var(--tg-bone); color: var(--tg-ink); }

/* ---------- FOCUS ---------------------------------------------------------
   In a quiet interface the focus ring is one of the few strong visual events.
   Never removed. Never invisible.
   -------------------------------------------------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--surface-accent);
  outline-offset: 3px;
}

/* Skip link */
.tg-skip {
  position: absolute;
  left: var(--tg-margin);
  top: 0;
  transform: translateY(-120%);
  z-index: 300;
  background: var(--tg-ink);
  color: var(--tg-bone);
  padding: var(--tg-s-xs) var(--tg-s-md);
  font-size: var(--tg-size-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: transform var(--tg-d-quick) var(--tg-e-standard);
}
.tg-skip:focus-visible { transform: translateY(0); }

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

.tg-display {
  font-family: var(--tg-font-display);
  font-size: var(--tg-size-display);
  font-weight: var(--tg-wt-medium);
  line-height: var(--tg-lh-display);
  letter-spacing: var(--tg-tr-display);
  font-stretch: 94%;
  text-wrap: balance;
}
.tg-h1 {
  font-family: var(--tg-font-display);
  font-size: var(--tg-size-h1);
  font-weight: var(--tg-wt-medium);
  line-height: var(--tg-lh-tight);
  letter-spacing: var(--tg-tr-h1);
  font-stretch: 96%;
  text-wrap: balance;
}
.tg-h2 {
  font-family: var(--tg-font-display);
  font-size: var(--tg-size-h2);
  font-weight: var(--tg-wt-medium);
  line-height: var(--tg-lh-heading);
  letter-spacing: var(--tg-tr-h2);
  text-wrap: balance;
}
.tg-h3 {
  font-family: var(--tg-font-display);
  font-size: var(--tg-size-h3);
  font-weight: var(--tg-wt-medium);
  line-height: var(--tg-lh-heading);
  letter-spacing: var(--tg-tr-h3);
}
.tg-lead {
  font-size: var(--tg-size-lead);
  font-weight: var(--tg-wt-light);
  line-height: var(--tg-lh-lead);
  letter-spacing: -0.012em;
  max-width: var(--tg-measure);
}
.tg-body { font-size: var(--tg-size-body); max-width: var(--tg-measure); }
.tg-body + .tg-body { margin-top: 1.15em; }
.tg-small {
  font-size: var(--tg-size-small);
  line-height: 1.5;
  color: var(--surface-mute);
}
.tg-eyebrow {
  display: block;
  font-size: var(--tg-size-eyebrow);
  font-weight: var(--tg-wt-medium);
  letter-spacing: var(--tg-tr-eyebrow);
  text-transform: uppercase;
  color: var(--surface-mute);
  line-height: 1;
}

/* Serif. statement moments only. Used sparingly, by design. */
.tg-serif {
  font-family: var(--tg-font-serif);
  font-weight: 400;
  letter-spacing: -0.005em;
}
.tg-serif.tg-display { font-stretch: normal; letter-spacing: -0.018em; line-height: 1.02; }

.tg-mute { color: var(--surface-mute); }
.tg-measure-tight { max-width: var(--tg-measure-tight); }
.tg-nowrap { white-space: nowrap; }

/* Numeric index marks. 01 / 02 / 03. Editorial device, tabular. */
.tg-num {
  font-size: var(--tg-size-eyebrow);
  font-weight: var(--tg-wt-medium);
  letter-spacing: 0.1em;
  color: var(--surface-mute);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */

.tg-section {
  background: var(--surface-bg);
  color: var(--surface-fg);
  padding-block: var(--tg-section);
  position: relative;
}
.tg-section--tight { padding-block: var(--tg-section-tight); }
.tg-section--flush-top { padding-top: 0; }
.tg-section--ruled { border-top: var(--tg-hair) solid var(--surface-rule); }

.tg-container {
  width: 100%;
  max-width: var(--tg-max);
  margin-inline: auto;
  padding-inline: var(--tg-margin);
}

/* 12-column grid */
.tg-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--tg-gutter);
}

/* Editorial split. asymmetric, vertically offset */
.tg-split {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--tg-gutter);
  row-gap: var(--tg-s-xl);
  align-items: start;
}
.tg-split__a { grid-column: 1 / span 5; }
.tg-split__b { grid-column: 7 / span 6; }
.tg-split--offset .tg-split__b { padding-top: clamp(0px, 3vw, 56px); }

/* Type field. the default section body */
.tg-field { max-width: 20ch; }
.tg-field--wide { max-width: 30ch; }

@media (max-width: 900px) {
  .tg-split__a, .tg-split__b { grid-column: 1 / -1; }
  .tg-split--offset .tg-split__b { padding-top: 0; }
  .tg-split { row-gap: var(--tg-s-lg); }
}

/* Stack utility */
.tg-stack > * + * { margin-top: var(--tg-s-md); }
.tg-stack-sm > * + * { margin-top: var(--tg-s-sm); }
.tg-stack-lg > * + * { margin-top: var(--tg-s-xl); }
.tg-stack-xl > * + * { margin-top: clamp(40px, 5vw, 80px); }

.tg-rule {
  height: var(--tg-hair);
  background: var(--surface-rule);
  border: 0;
  margin: 0;
}

/* ==========================================================================
   MOTION. one shared observer adds .is-in. Content is visible without JS.
   ========================================================================== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(var(--tg-move-md));
  transition:
    opacity var(--tg-d-slow) var(--tg-e-entrance),
    transform var(--tg-d-slow) var(--tg-e-entrance);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}