/* ============================================================
   Site layer — layout utilities and behaviour the design system
   previews demonstrated with preview-only chrome.
   Load after tokens.css, base.css, components.css.
   ============================================================ */

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: calc(var(--z-header) + 10);
  padding: var(--s-3) var(--s-4);
  background: var(--ink);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  transform: translateY(-110%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -4px;
}

/* ── Card / block grids ── */
.cards {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
}

.cards--2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
}

.cards--stacked {
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-4);
}

.row--top {
  align-items: flex-start;
}

.row--wide {
  gap: var(--s-6);
}

/* ── Section heading block ── */
.section__head {
  max-width: 44em;
}

.section__head .t-lead {
  margin-top: var(--s-3);
}

.section__body {
  margin-top: var(--s-6);
}

/* ── Prose (privacy policy, long-form) ── */
.prose {
  max-width: var(--measure);
}

.prose h2 {
  margin-top: var(--s-6);
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  line-height: 1.5;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p,
.prose ul {
  margin-top: var(--s-3);
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--ink-2);
}

.prose li {
  padding-left: 1.1em;
  position: relative;
}

.prose li + li {
  margin-top: var(--s-2);
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 4px;
  height: 4px;
  background: var(--rule-strong);
}

/* ── Mobile navigation drawer ── */
.nav-drawer {
  display: none;
  border-bottom: var(--spine-line) solid var(--rule);
  background: var(--paper);
}

.nav-drawer[data-open="true"] {
  display: block;
}

@media (min-width: 56em) {
  .nav-drawer,
  .nav-drawer[data-open="true"] {
    display: none;
  }
}

.nav-drawer__inner {
  padding: var(--s-4) var(--s-5) var(--s-5);
}

.nav-drawer__link {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-height: 44px;
  padding-block: var(--s-3);
  border-bottom: var(--spine-line) solid var(--rule);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--fw-medium);
  color: var(--ink-2);
}

.nav-drawer__link[aria-current="page"] {
  color: var(--ink);
  font-weight: var(--fw-bold);
}

.nav-drawer__link[aria-current="page"]::before {
  content: "";
  width: var(--node);
  height: var(--node);
  flex: none;
  background: var(--accent);
}

.nav-drawer .btn {
  width: 100%;
  justify-content: space-between;
  margin-top: var(--s-4);
}

/* hamburger */
.nav-toggle {
  width: 44px;
  height: 44px;
  display: none;
  place-items: center;
}

@media (max-width: 55.99em) {
  .nav-toggle {
    display: grid;
  }
}

.nav-toggle__bars {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--ink);
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--ink);
}

.nav-toggle__bars::before {
  top: -5px;
}

.nav-toggle__bars::after {
  top: 5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ── Proof strip under the hero ── */
.proof {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-6);
}

.proof__val {
  margin-top: var(--s-2);
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
  color: var(--ink);
}

@media (max-width: 39.99em) {
  .proof {
    gap: var(--s-4);
  }

  .proof__val {
    font-size: 0.9375rem;
  }
}

/* ── Figure / metric block ── */
.metric {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: var(--fw-medium);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  margin-top: var(--s-1);
}

.metric__arrow {
  color: var(--accent);
}

/* ── Contact layout ── */
.contact-grid {
  display: grid;
  gap: var(--s-7);
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  align-items: start;
}

@media (max-width: 55.99em) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }
}

.form-stack {
  display: grid;
  gap: var(--s-4);
}

/* grid children stretch by default; the submit button must keep its
   content width, per the button spec */
.form-stack > .btn {
  justify-self: start;
}

/* inside a checkbox label the required marker is inline, so it needs its
   own spacing — .field__label gets it from flex gap instead */
.check .field__req {
  margin-inline-start: 0.4em;
}

/* ── Form status message (client-side validation summary) ── */
.form-status {
  display: none;
  gap: var(--s-3);
  padding: var(--s-4);
  border: var(--spine-line) solid var(--rule);
  border-radius: var(--r-2);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.form-status[data-state="error"] {
  display: flex;
  border-color: var(--danger);
  background: #fdf2f0;
  color: var(--danger);
}

.form-status[data-state="ok"] {
  display: flex;
  border-color: #a7d8bb;
  background: #f0f9f4;
  color: #166534;
}

/* ── Footer nav current state ── */
.footer-col a[aria-current="page"] {
  color: #fff;
}

/* ── Utility ── */
.mt-2 {
  margin-top: var(--s-2);
}

.mt-3 {
  margin-top: var(--s-3);
}

.mt-4 {
  margin-top: var(--s-4);
}

.mt-5 {
  margin-top: var(--s-5);
}

.mt-6 {
  margin-top: var(--s-6);
}