/* ─── Reset ───────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-ui);
  font-weight: var(--weight-light);
  font-size: var(--text-base);
  line-height: var(--leading-base);
  cursor: none; /* replaced by custom cursor */
  overflow-x: hidden;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  background: none;
  border: none;
  cursor: none;
  font: inherit;
  color: inherit;
}

/* ─── Container ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

/* Column span helpers */
.col-1  { grid-column: span 1; }
.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* Column start offsets */
.col-start-2  { grid-column-start: 2; }
.col-start-3  { grid-column-start: 3; }
.col-start-4  { grid-column-start: 4; }
.col-start-5  { grid-column-start: 5; }
.col-start-7  { grid-column-start: 7; }
.col-start-8  { grid-column-start: 8; }
.col-start-9  { grid-column-start: 9; }

/* ─── Sections ────────────────────────────────────────────── */
section {
  position: relative;
}

.section--ruled {
  border-top: var(--border-width) solid var(--border);
}

/* ─── Nav ─────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--sp-16);
  display: flex;
  align-items: center;
  border-bottom: var(--border-width) solid transparent;
  transition: border-color var(--dur-base) var(--ease-out),
              background-color var(--dur-base) var(--ease-out);
}

.nav--scrolled {
  background-color: color-mix(in srgb, var(--carbon) 92%, transparent);
  border-color: var(--border);
  backdrop-filter: blur(12px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: var(--sp-16);
}

/* ─── Card grid — asymmetric ──────────────────────────────── */
/*
  4 cards across 12 cols: 3 · 3 · 3 · 3 even base,
  but the first card is intentionally wider (5 cols)
  and the last is narrower (3). Adjusted in components.css.
*/
.cards-grid {
  display: grid;
  grid-template-columns: 7fr 5fr 4fr 8fr;
  column-gap: var(--gutter);
  row-gap: var(--sp-6);
}

/* ─── Two-col split ───────────────────────────────────────── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--gutter);
}

.split--60-40 {
  display: grid;
  grid-template-columns: 6fr 4fr;
}

.split--40-60 {
  display: grid;
  grid-template-columns: 4fr 6fr;
  column-gap: var(--sp-16);
}

/* ─── Four-col approach ───────────────────────────────────── */
.quad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  column-gap: var(--gutter);
}

/* ─── Divider ─────────────────────────────────────────────── */
.divider {
  width: 100%;
  height: var(--border-width);
  background-color: var(--border);
}

/* ─── Scroll reveal ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 80ms; }
.reveal--delay-2 { transition-delay: 160ms; }
.reveal--delay-3 { transition-delay: 240ms; }
.reveal--delay-4 { transition-delay: 320ms; }

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quad {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 1rem;
  }

  .grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .cards-grid,
  .split,
  .split--60-40,
  .split--40-60,
  .quad {
    grid-template-columns: 1fr;
  }

  /* override col spans to full on mobile */
  [class*="col-"] {
    grid-column: span 4;
  }

  .col-start-2,
  .col-start-3,
  .col-start-4,
  .col-start-5,
  .col-start-7,
  .col-start-8,
  .col-start-9 {
    grid-column-start: 1;
  }
}