/* =============================================================================
   GLOBAL STYLES
   Reset, typography, shared utilities. No theme colours here — use tokens.
   ============================================================================= */

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

html, body {
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--surface-base);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ----- Typography ---------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: 1.2;
  font-weight: 700;
  color: var(--text);
}

p {
  margin: 0;
}

/* ----- Section layout ------------------------------------------------------ */
.section-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 24px;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--section-border);
  margin: 0;
}

/* ----- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s, border-color 0.15s;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  .btn:hover {
    transform: none;
  }
}

/* ----- Accessibility utilities --------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 0 0 8px 0;
  transition: top 0.1s;
}

.skip-link:focus {
  top: 0;
}

/* ----- Focus styles -------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ----- Cards --------------------------------------------------------------- */
.card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  transition: border-color 0.25s, background-color 0.25s;
}

/* ----- Responsive grid helpers -------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 1023px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}