/* QuesMo site — neutral accessible design system.
   Brand tokens are placeholders to be replaced with real QuesMo assets later.
   Contrast pairs chosen for WCAG 2.2 AA (verified by axe in the browser tests):
     light: text #1b1b2b on #ffffff (~15:1); accent #3730a3 on #ffffff (~9:1)
     dark:  text #eef0f6 on #14141f (~15:1); link #b9c0ff on #14141f (~9:1) */

:root {
  --color-bg: #ffffff;
  --color-surface: #f8f9fa;
  --color-text: #2d3436;
  --color-muted: #636e72;
  --color-accent: #016161;
  --color-accent-contrast: #ffffff;
  --color-brand: #018786;
  --color-gold: #fcb41c;
  --color-border: #dfe3e6;
  --color-focus: #016161;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --fs-base: 1rem;      /* 16px */
  --fs-sm: 0.875rem;
  --fs-lg: 1.25rem;
  --fs-h1: clamp(1.75rem, 1.2rem + 2.5vw, 2.5rem);
  --fs-h2: clamp(1.35rem, 1.1rem + 1.2vw, 1.75rem);
  --lh: 1.6;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;

  --radius: 10px;
  --measure: 70ch;
  --page-max: 64rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0e1514;
    --color-surface: #17211f;
    --color-text: #eef2f1;
    --color-muted: #b9c4c2;
    --color-accent: #5ee0d3;
    --color-accent-contrast: #0e1514;
    --color-brand: #5ee0d3;
    --color-gold: #ffd36b;
    --color-border: #2b3a38;
    --color-focus: #5ee0d3;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh);
}
img { max-width: 100%; height: auto; }

main {
  display: block;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-2);
}
main > * { max-width: var(--measure); }
main > h1 { max-width: none; }

h1 { font-size: var(--fs-h1); line-height: 1.2; margin: 0 0 var(--space-3); }
h2 { font-size: var(--fs-h2); line-height: 1.25; margin: var(--space-6) 0 var(--space-2); }
h3 { font-size: var(--fs-lg); margin: var(--space-4) 0 var(--space-1); }
p, ul, ol { margin: 0 0 var(--space-2); }
li { margin: 0.25rem 0; }

a { color: var(--color-accent); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-1) var(--space-2);
  z-index: 100;
}
.skip-link:focus { left: var(--space-2); }

/* Header + nav */
.site-header {
  border-top: 3px solid var(--color-brand);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
h1 { color: var(--color-brand); }
.site-header .bar {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--space-1) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.brand { font-weight: 700; text-decoration: none; color: var(--color-text); }
.nav-list {
  list-style: none;
  display: flex;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-list a { min-height: 44px; display: inline-flex; align-items: center; }
.cta-header { margin-left: auto; }

@media (min-width: 48rem) {
  .nav-list { margin-left: auto; }
}

/* Buttons / CTAs */
.cta, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
}
.cta {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.cta:hover { filter: brightness(1.05); }
.btn { border: 1px solid var(--color-border); color: var(--color-text); }

.actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-3) 0; }

/* Disclosure */
.disclosure {
  font-size: var(--fs-sm);
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-1) var(--space-2);
}

/* Cards */
.cards { display: grid; gap: var(--space-2); grid-template-columns: 1fr; max-width: none; }
@media (min-width: 40rem) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  background: var(--color-surface);
}
.card h3 { margin-top: 0; }

/* Article (guides) */
.byline { color: var(--color-muted); font-size: var(--fs-sm); }
.related { border-top: 1px solid var(--color-border); margin-top: var(--space-6); padding-top: var(--space-2); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: var(--space-6);
}
.site-footer .bar { max-width: var(--page-max); margin: 0 auto; padding: var(--space-3) var(--space-2); }
.site-footer ul { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2); padding: 0; }
.site-footer a { min-height: 44px; display: inline-flex; align-items: center; }

details > summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}