/**
 * Shared experiment chrome + primitives (cards, ads, FAQ, related, buttons).
 */

.exp-body,
body.layout-family-finance,
body.layout-family-health,
body.layout-family-math,
body.layout-family-unit,
body.layout-family-date,
body.layout-family-guide {
  margin: 0;
  color: var(--ds-color-text);
  background: var(--ds-color-bg);
  line-height: var(--ds-leading-normal);
  -webkit-font-smoothing: antialiased;
}

.exp-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ds-color-primary);
  color: var(--ds-color-on-primary);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.exp-skip:focus { left: 0.5rem; top: 0.5rem; }

.exp-banner {
  border-bottom: 1px solid var(--ds-color-border);
  background: color-mix(in srgb, var(--ds-color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 40;
}
.exp-banner__inner {
  max-width: var(--ds-container);
  margin: 0 auto;
  padding: 0.65rem var(--ds-page-pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
}
.exp-banner__brand {
  font-weight: 700;
  color: var(--ds-color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.exp-banner__badge {
  font-size: var(--ds-text-xs);
  font-weight: 600;
  color: var(--ds-color-primary-deep);
  background: var(--ds-color-primary-soft);
  padding: 0.25rem 0.6rem;
  border-radius: var(--ds-radius-pill);
}
.exp-banner__prod {
  margin-left: auto;
  font-size: var(--ds-text-sm);
  color: var(--ds-color-text-secondary);
  text-decoration: none;
}
.exp-banner__prod:hover { color: var(--ds-color-primary); }

.exp-footer {
  max-width: var(--ds-container);
  margin: 0 auto;
  padding: 2rem var(--ds-page-pad) 3rem;
  color: var(--ds-color-text-secondary);
  font-size: var(--ds-text-sm);
  border-top: 1px solid var(--ds-color-border);
}
.exp-footer a { color: var(--ds-color-primary); }

.ds-wrap {
  max-width: var(--ds-container-calc);
  margin: 0 auto;
  padding-left: var(--ds-page-pad);
  padding-right: var(--ds-page-pad);
}
.ds-wrap--reading { max-width: var(--ds-container-reading); }
.ds-wrap--full { max-width: var(--ds-container); }

.ds-section { padding: var(--ds-section-y) 0; }
.ds-section--muted { background: var(--ds-color-surface-muted); }

.ds-card {
  background: var(--ds-color-surface);
  border: 1px solid var(--ds-color-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-md);
  padding: 1.35rem 1.4rem 1.5rem;
}

.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 0;
  border-radius: var(--ds-radius-md);
  font: inherit;
  font-weight: 650;
  font-size: var(--ds-text-sm);
  padding: 0.7rem 1.1rem;
  cursor: pointer;
  transition: background var(--ds-duration) var(--ds-ease), color var(--ds-duration) var(--ds-ease);
}
.ds-btn--primary {
  background: var(--ds-color-primary);
  color: var(--ds-color-on-primary);
}
.ds-btn--primary:hover { background: var(--ds-color-primary-deep); }
.ds-btn--ghost {
  background: transparent;
  color: var(--ds-color-primary);
  border: 1px solid var(--ds-color-border);
}
.ds-btn--ghost:hover { border-color: var(--ds-color-primary); background: var(--ds-color-primary-soft); }

.ds-chip {
  border: 1px solid var(--ds-color-border);
  background: var(--ds-color-surface);
  color: var(--ds-color-text-secondary);
  font: inherit;
  font-size: var(--ds-text-sm);
  font-weight: 560;
  padding: 0.4rem 0.75rem;
  border-radius: var(--ds-radius-pill);
  cursor: pointer;
}
.ds-chip:hover,
.ds-chip.is-active {
  border-color: var(--ds-color-primary);
  color: var(--ds-color-primary-deep);
  background: var(--ds-color-primary-soft);
}

.ds-input {
  width: 100%;
  border: 1px solid var(--ds-color-border-strong);
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-surface);
  color: var(--ds-color-text);
  font: inherit;
  font-weight: 650;
  font-size: var(--ds-text-lg);
  padding: 0.85rem 1rem;
  outline: none;
}
.ds-input:focus { border-color: var(--ds-color-primary); box-shadow: var(--ds-focus-ring); }

.ds-label {
  display: block;
  font-weight: 600;
  font-size: var(--ds-text-sm);
  margin-bottom: 0.45rem;
  color: var(--ds-color-text);
}

.ds-faq { display: grid; gap: 0.5rem; max-width: 42rem; }
.ds-faq__item {
  background: var(--ds-color-surface);
  border: 1px solid var(--ds-color-border);
  border-radius: var(--ds-radius-md);
  padding: 0.1rem 1rem;
}
.ds-faq__item summary {
  cursor: pointer;
  font-weight: 650;
  padding: 0.9rem 0;
  list-style: none;
}
.ds-faq__item summary::-webkit-details-marker { display: none; }
.ds-faq__item p {
  margin: 0 0 0.9rem;
  color: var(--ds-color-text-secondary);
  font-size: var(--ds-text-sm);
}

.ds-related {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}
@media (min-width: 600px) {
  .ds-related { grid-template-columns: repeat(2, 1fr); }
}
.ds-related a {
  display: block;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--ds-color-border);
  border-radius: var(--ds-radius-md);
  text-decoration: none;
  color: var(--ds-color-text);
  font-weight: 560;
  background: var(--ds-color-surface);
}
.ds-related a:hover {
  border-color: var(--ds-color-primary);
  color: var(--ds-color-primary);
}

.exp-ad { margin: 1.25rem auto; }
.exp-ad__label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ds-color-ad-label);
  margin-bottom: 0.35rem;
}
.exp-ad__box {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  background: var(--ds-color-ad-bg);
  border: 1px dashed var(--ds-color-ad-border);
  border-radius: var(--ds-radius-md);
  color: var(--ds-color-ad-label);
  font-size: var(--ds-text-sm);
}
.exp-ad__box--leader { min-height: 90px; }

.ds-eyebrow {
  margin: 0 0 0.5rem;
  font-size: var(--ds-text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ds-color-accent-deep);
}
.ds-h1 {
  margin: 0 0 0.65rem;
  font-size: var(--ds-text-3xl);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: var(--ds-leading-tight);
}
.ds-lead {
  margin: 0;
  max-width: 36rem;
  color: var(--ds-color-text-secondary);
  font-size: var(--ds-text-lg);
}
.ds-h2 {
  margin: 0 0 1rem;
  font-size: var(--ds-text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.ds-muted { color: var(--ds-color-text-secondary); font-size: var(--ds-text-sm); }