/* Assistall AI brand tokens.
   Authoritative source: assistall-app/branding/assistall_brand_tokens.json
   Do not invent colours. If something is missing here, ask before adding. */

:root {
  /* Palette */
  --teal:       #0E3A3D;  /* deep teal   - primary, headings, dark sections */
  --limestone:  #F4EFE4;  /* pale limestone - section backgrounds */
  --ivory:      #FFFDF8;  /* warm ivory  - page background */
  --brass:      #C8A25D;  /* muted brass - accents, rules, one CTA */
  --charcoal:   #172A2C;  /* body text */
  --white:      #FFFFFF;

  /* Derived, kept deliberately few */
  --teal-soft:  color-mix(in srgb, var(--teal) 8%, var(--ivory));
  --rule:       color-mix(in srgb, var(--charcoal) 14%, transparent);
  --muted:      color-mix(in srgb, var(--charcoal) 66%, var(--ivory));

  /* Typography — matches the application shell */
  --font: "Aptos", "Segoe UI", Arial, sans-serif;

  /* Scale. Only these steps; do not add intermediate sizes. */
  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.5vw, 1.5rem);
  --step-2:  clamp(1.5rem, 1.3rem + 1vw, 2.1rem);
  --step-3:  clamp(1.9rem, 1.5rem + 2vw, 3rem);
  --step-4:  clamp(2.3rem, 1.7rem + 3.2vw, 4rem);

  /* Rhythm */
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(3.5rem, 8vw, 7rem);
  --measure: 62ch;      /* never let body copy run wider */
  --page-max: 1180px;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--ivory);
}

h1, h2, h3 { color: var(--teal); line-height: 1.15; text-wrap: balance; margin: 0 0 0.5em; }
h1 { font-size: var(--step-4); font-weight: 600; }
h2 { font-size: var(--step-3); font-weight: 600; }
h3 { font-size: var(--step-1); font-weight: 600; }
p  { margin: 0 0 1em; max-width: var(--measure); }

a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 2px;
}

img, svg { max-width: 100%; height: auto; }

/* Layout ------------------------------------------------------------------ */
.wrap { width: min(100% - (var(--gutter) * 2), var(--page-max)); margin-inline: auto; }
.section { padding-block: var(--section-y); }
.section--limestone { background: var(--limestone); }
.section--teal { background: var(--teal); color: var(--limestone); }
.section--teal h2, .section--teal h3 { color: var(--ivory); }

/* Buttons ----------------------------------------------------------------- */
.button {
  display: inline-block;
  padding: 0.8em 1.6em;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.button--primary { color: var(--ivory); background: var(--teal); border-color: var(--teal); }
.button--primary:hover { background: color-mix(in srgb, var(--teal) 88%, var(--white)); }
.button--quiet { color: var(--teal); background: transparent; border-color: var(--brass); }
.button--quiet:hover { background: color-mix(in srgb, var(--brass) 12%, transparent); }

/* Small helpers ----------------------------------------------------------- */
.eyebrow {
  margin: 0 0 0.75rem;
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--brass);
}
.lede { font-size: var(--step-1); color: var(--muted); }
.rule { border: 0; border-top: 1px solid var(--rule); margin-block: var(--section-y); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.skip-link {
  position: absolute; inset-inline-start: 0; top: -3rem;
  padding: 0.75rem 1rem; background: var(--teal); color: var(--ivory);
}
.skip-link:focus { top: 0; }

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