/* ============================================================
   BRAMS — Base typography, layout, utilities.
   ============================================================ */

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  scroll-behavior: smooth;
  /* Lenis takes over scroll when JS is up. */
  transition: background-color var(--dur) var(--ease-out);
  /* Mobile overflow safety net — never let a stray 100vw child bleed sideways. */
  overflow-x: hidden;
  max-width: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  overflow-x: clip;
  max-width: 100%;
  transition: background-color var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out);
}

/* --- View Transitions (native MPA) ------------------------- */
@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation: vt-fade-out 280ms var(--ease-out) forwards;
}
::view-transition-new(root) {
  animation: vt-fade-in 420ms var(--ease-out) forwards;
}
::view-transition {
  /* Subtle brand-tint bleed between snapshots. */
  background-color: var(--brams-blue-deep);
}

@keyframes vt-fade-out { to { opacity: 0; } }
@keyframes vt-fade-in  { from { opacity: 0; } to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) { animation: none; }
}

/* --- Typography ------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text);
}

h1 { font-size: var(--fs-h1); font-weight: 800; font-stretch: 125%; }
h2 { font-size: var(--fs-h2); font-weight: 800; font-stretch: 125%; }
h3 { font-size: var(--fs-h3); font-weight: 700; font-stretch: 110%; }
h4 { font-size: var(--fs-h4); font-weight: 700; }
h5 { font-size: var(--fs-h5); font-weight: 600; }
h6 { font-size: var(--fs-h6); font-weight: 600; }

p { color: var(--text); }
p + p { margin-top: 1em; }

strong { font-weight: 600; }

.display {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 900;
  font-stretch: 125%;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.lede { font-size: var(--fs-lead); line-height: 1.4; color: var(--text-muted); }

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--text-muted);
}

.mono--micro { font-size: var(--fs-micro); }
.mono--accent { color: var(--accent); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.625em;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

/* --- Layout primitives ----------------------------------- */
.shell {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
  position: relative;
}

.section--flush-top    { padding-top: 0; }
.section--flush-bottom { padding-bottom: 0; }

.section--light {
  background: var(--aluminium);
  color: var(--black);
}
.section--off-white {
  background: var(--off-white);
  color: var(--black);
}
.section--graphite { background: var(--graphite); }

/* Generic grid helpers */
.grid { display: grid; gap: var(--gutter); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* Visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: 8px; left: 8px;
  padding: 0.5rem 0.875rem;
  background: var(--accent);
  color: var(--off-white);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-mono);
  z-index: 1000;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

/* --- Animation primitive base states ---------------------
   The reveal is fire-once: once .is-revealed is set, JS doesn't
   touch it again. Release will-change so the GPU layer is freed
   and any future ancestor changes (theme switch, etc.) can't
   re-trigger a paint that looks like flicker. */
[data-reveal] {
  opacity: 0;
  transform: translateY(32px);
  clip-path: inset(0 0 100% 0);
  transition: opacity 0.7s var(--ease-out),
              transform 0.7s var(--ease-out),
              clip-path 0.7s var(--ease-out);
  will-change: opacity, transform, clip-path;
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
  clip-path: inset(0 0 0 0);
  will-change: auto;
}

[data-split] .split-word { display: inline-block; overflow: hidden; vertical-align: top; line-height: 1; }
/* Inners are visible by default — JS sets the pre-animation hidden state via gsap.set
   so a failure to animate never strands the headline off-screen. */
[data-split] .split-word .split-inner { display: inline-block; will-change: transform; }

/* Reduced motion: force reveals visible immediately */
@media (prefers-reduced-motion: reduce) {
  [data-reveal], [data-reveal].is-revealed {
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    transition: none !important;
  }
  [data-split] .split-word .split-inner { transform: none !important; }
}

/* --- Custom cursor base ---------------------------------- */
body.has-cursor, body.has-cursor * { cursor: none; }
body.has-cursor a, body.has-cursor button, body.has-cursor [data-magnetic] { cursor: none; }
@media (hover: none), (pointer: coarse) {
  body.has-cursor, body.has-cursor * { cursor: auto !important; }
  .cursor { display: none !important; }
}

/* --- Utilities ------------------------------------------ */
.no-scroll { overflow: hidden; }
.text-accent { color: var(--accent); }
.text-muted  { color: var(--text-muted); }