/* ============================================================
   Coincento Design System — Base layer
   Reset, document defaults, typography primitives, layout helpers
   ============================================================ */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg-canvas);
  color: var(--fg-body);
  font-family: var(--font-text);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv05" 1, "ss01" 1;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--fg-default);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

a {
  color: var(--fg-link);
  text-decoration-color: color-mix(in srgb, currentColor 35%, transparent);
  text-underline-offset: 3px;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover { color: var(--c-teal-800); text-decoration-color: currentColor; }

/* An <a class="btn"> is a button: its colour comes from the button's own
   tokens, never from link colouring. Kept at 0-1-1 so it beats the bare `a`
   rules without out-specifying component classes like .nav__link. */
a.btn, a.btn:hover { color: var(--btn-fg); text-decoration: none; }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-xs);
}

::selection { background: var(--c-teal-200); color: var(--c-petrol-800); }

/* ---------- Type scale utilities ------------------------- */
.t-display-1 { font-family: var(--font-display); font-size: var(--fs-display-1); line-height: var(--lh-tight); letter-spacing: var(--ls-tightest); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-display-2 { font-family: var(--font-display); font-size: var(--fs-display-2); line-height: var(--lh-tight); letter-spacing: var(--ls-tightest); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: var(--lh-snug); letter-spacing: var(--ls-tight); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: var(--lh-snug); letter-spacing: var(--ls-tight); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-h3 { font-family: var(--font-display); font-size: var(--fs-h3); line-height: var(--lh-snug); letter-spacing: var(--ls-snug); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-h4 { font-family: var(--font-display); font-size: var(--fs-h4); line-height: var(--lh-normal); letter-spacing: var(--ls-snug); font-weight: var(--fw-semibold); color: var(--fg-default); }
.t-body-lg { font-size: var(--fs-body-lg); line-height: var(--lh-relaxed); }
.t-body    { font-size: var(--fs-body);    line-height: var(--lh-relaxed); }
.t-body-sm { font-size: var(--fs-body-sm); line-height: var(--lh-normal); }
.t-caption { font-size: var(--fs-caption); line-height: var(--lh-normal); color: var(--fg-muted); }
.t-overline {
  font-size: var(--fs-overline); line-height: var(--lh-normal);
  letter-spacing: var(--ls-widest); text-transform: uppercase;
  font-weight: var(--fw-semibold); color: var(--fg-brand);
}
.t-mono { font-family: var(--font-mono); font-size: var(--fs-body-sm); letter-spacing: var(--ls-snug); font-variant-ligatures: none; }
.t-num  { font-variant-numeric: tabular-nums; }

/* Colour helpers */
.fg-default { color: var(--fg-default); }
.fg-body { color: var(--fg-body); }
.fg-secondary { color: var(--fg-secondary); }
.fg-muted { color: var(--fg-muted); }
.fg-brand { color: var(--fg-brand); }
.fg-inverse { color: var(--fg-inverse); }
.fg-success { color: var(--fg-success); }
.fg-warning { color: var(--fg-warning); }
.fg-danger  { color: var(--fg-danger); }

/* ---------- Layout --------------------------------------- */
.container    { width: 100%; max-width: var(--container-lg); margin-inline: auto; padding-inline: var(--sp-6); }
.container--md{ max-width: var(--container-md); }
.container--sm{ max-width: var(--container-sm); }

.section    { padding-block: var(--sp-20); }
.section--sm{ padding-block: var(--sp-12); }
.section--lg{ padding-block: var(--sp-24); }

.stack > * + * { margin-top: var(--sp-4); }
.stack-2 > * + * { margin-top: var(--sp-2); }
.stack-6 > * + * { margin-top: var(--sp-6); }
.stack-8 > * + * { margin-top: var(--sp-8); }

.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-3); }
.cluster--tight { gap: var(--sp-2); }
.cluster--between { justify-content: space-between; }

.grid { display: grid; gap: var(--sp-4); }
.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: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0,1fr); } }

/* Two equal columns that collapse together. It belongs here rather than in a
   page's own styles because the shared footer uses it: when it lived in the
   homepage's <style>, every other page got a footer with its columns stacked
   on top of each other. */
.split { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: var(--sp-16); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: minmax(0,1fr); gap: var(--sp-10); } }

.measure    { max-width: 58ch; }
.measure-sm { max-width: 44ch; }

.on-dark { color: rgba(255,255,255,.86); }
.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4 { color: #FFFFFF; }
.on-dark a, .on-dark .fg-brand { color: var(--c-teal-400); }
.on-dark a.btn, .on-dark a.btn:hover { color: var(--btn-fg); }
.on-dark .fg-muted, .on-dark .t-caption { color: var(--c-neutral-400); }
.on-dark :focus-visible { box-shadow: var(--focus-ring-inverse); }

.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;
}

.divider { height: 1px; background: var(--border-subtle); border: 0; margin: 0; }