/**
 * ARCHE — base / reset léger / typographie
 * Mobile-first, contraste via variables
 */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin-top: 0;
  color: var(--color-text);
}

h1 {
  font-size: 1.75rem;
}

h2 {
  font-size: 1.375rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-top: 0;
  margin-bottom: calc(var(--space-unit) * 2);
}

a {
  color: var(--color-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-link-hover);
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

[data-theme="high-contrast"] a:focus-visible,
[data-theme="high-contrast"] button:focus-visible,
[data-theme="high-contrast"] select:focus-visible {
  outline: 3px solid #000000;
  outline-offset: 2px;
  background-color: #ffff00;
  color: #000000;
}

ul,
ol {
  padding-left: 1.25rem;
}

.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 {
  position: absolute;
  top: -100%;
  left: var(--space-unit);
  z-index: 10000;
  padding: calc(var(--space-unit) * 1.5) calc(var(--space-unit) * 2);
  background: var(--color-surface);
  color: var(--color-text);
  border: 2px solid var(--color-brand);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-unit);
}

button,
.btn {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  padding: calc(var(--space-unit) * 1.5) calc(var(--space-unit) * 3);
}

.btn-primary {
  background: var(--color-brand);
  color: #ffffff;
  border-color: var(--color-brand);
}

[data-theme="dark"] .btn-primary {
  color: #0f172a;
}

[data-theme="high-contrast"] .btn-primary {
  background: #000000;
  color: #ffffff;
  border-color: #000000;
}

.btn-primary:hover {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-alt);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
  padding: calc(var(--space-unit) * 1) calc(var(--space-unit) * 1.5);
}

.btn-ghost[aria-pressed="true"] {
  background: var(--color-brand);
  color: #ffffff;
  border-color: var(--color-brand);
}

[data-theme="dark"] .btn-ghost[aria-pressed="true"] {
  color: #0f172a;
}

[data-theme="high-contrast"] .btn-ghost[aria-pressed="true"] {
  background: #000000;
  color: #ffff00;
  border-color: #000000;
}