/* Shared styles. Every value resolves to tokens.css (spacing, radius, color, motion). */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: var(--spacing-900); }
body {
  margin: 0;
  font-family: 'Geist', ui-sans-serif, system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.5rem;
  background-color: var(--surface-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  transition: background-color 300ms var(--ease), color 300ms var(--ease);
}
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; }
p, li, dd { text-wrap: pretty; }
.mono { font-family: 'Geist Mono', ui-monospace, monospace; font-variant-numeric: tabular-nums; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Text styles (landing-page-design B1) ---------- */
.heading-1 { font-size: 3.75rem; line-height: 3.75rem; font-weight: 600; }
.heading-2 { font-size: 3rem; line-height: 3rem; font-weight: 600; }
.heading-3 { font-size: 2.25rem; line-height: 2.5rem; font-weight: 600; }
.heading-4 { font-size: 1.875rem; line-height: 2.25rem; font-weight: 600; }
.heading-5 { font-size: 1.5rem; line-height: 2rem; font-weight: 600; }
.heading-6 { font-size: 1.25rem; line-height: 1.75rem; font-weight: 600; }
.title-1 { font-size: 1.25rem; line-height: 1.75rem; font-weight: 500; }
.title-2 { font-size: 1.125rem; line-height: 1.75rem; font-weight: 500; }
.title-3 { font-size: 1rem; line-height: 1.5rem; font-weight: 500; }
.title-4 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 500; }
.title-5 { font-size: 0.75rem; line-height: 1rem; font-weight: 500; }
.body-1 { font-size: 1rem; line-height: 1.5rem; font-weight: 600; }
.body-2 { font-size: 1rem; line-height: 1.5rem; font-weight: 500; }
.body-3 { font-size: 1rem; line-height: 1.5rem; font-weight: 400; }
.body-4 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; }
.body-5 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 500; }
.body-6 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 400; }
.button-lg { font-size: 1.125rem; line-height: 1.75rem; font-weight: 600; }
.button-md { font-size: 1rem; line-height: 1.5rem; font-weight: 600; }
.button-sm { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; }
.button-xsm { font-size: 0.75rem; line-height: 1rem; font-weight: 600; }
.caption-1 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 500; }
.caption-2 { font-size: 0.875rem; line-height: 1.25rem; font-weight: 400; }
.caption-3 { font-size: 0.75rem; line-height: 1rem; font-weight: 600; }
.caption-4 { font-size: 0.75rem; line-height: 1rem; font-weight: 500; }
.caption-5 { font-size: 0.75rem; line-height: 1rem; font-weight: 400; }

/* On small screens the large headings step down the scale (still on scale steps). */
@media (max-width: 640px) {
  .heading-1 { font-size: 2.25rem; line-height: 2.5rem; }
  .heading-2 { font-size: 1.875rem; line-height: 2.25rem; }
  .heading-3 { font-size: 1.5rem; line-height: 2rem; }
}

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: 1248px; margin-inline: auto; padding-inline: var(--spacing-300); }
@media (max-width: 640px) { .container { padding-inline: var(--spacing-200); } }
.section { padding-block: var(--spacing-800); }
@media (max-width: 640px) { .section { padding-block: var(--spacing-700); } }
.section-head { max-width: 680px; display: grid; gap: var(--spacing-200); margin-bottom: var(--spacing-600); }
.divider { height: 1px; background-color: var(--border-primary); border: 0; margin: 0; }

.card {
  background-color: var(--surface-primary-subtle);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-16);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed; top: var(--spacing-200); left: var(--spacing-200); z-index: 100;
  padding: var(--spacing-75) var(--spacing-100);
  background-color: var(--action-primary); color: var(--text-on-action);
  border-radius: var(--radius-8);
  transform: translateY(-200%);
  transition: transform 300ms var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); outline: 2px solid var(--border-focus); outline-offset: 2px; }

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-75);
  min-height: 40px;
  padding: var(--spacing-75) var(--spacing-100);
  border: 1px solid transparent;
  border-radius: var(--radius-8);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 300ms var(--ease), border-color 300ms var(--ease), color 300ms var(--ease), transform 200ms var(--ease);
}
.btn i { font-size: 1.125rem; }
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled, .btn[aria-disabled="true"] { cursor: not-allowed; }
@media (pointer: coarse) { .btn { min-height: 44px; } }

.btn-primary { background-color: var(--action-primary); color: var(--text-on-action); }
.btn-primary:hover:not(:disabled) { background-color: var(--action-primary-hover); }
.btn-primary:active:not(:disabled) { background-color: var(--action-primary-click); }
.btn-primary:disabled { background-color: var(--action-primary-disabled); color: var(--text-secondary-disabled); }

.btn-secondary { background-color: var(--action-secondary); color: var(--text-primary); border-color: var(--border-primary-light); }
.btn-secondary:hover:not(:disabled) { background-color: var(--action-secondary-hover); }
.btn-secondary:active:not(:disabled) { background-color: var(--action-secondary-click); }
.btn-secondary:disabled { color: var(--text-primary-disabled); border-color: var(--border-primary-disabled); }

.btn-tertiary { background-color: transparent; color: var(--text-primary); }
.btn-tertiary:hover:not(:disabled) { background-color: var(--surface-primary-hover); }
.btn-tertiary:active:not(:disabled) { background-color: var(--surface-primary-selected); }
.btn-tertiary:disabled { color: var(--text-primary-disabled); }

.btn-error { background-color: var(--action-error); color: var(--text-on-action); }
.btn-error:hover:not(:disabled) { background-color: var(--action-error-hover); }

.btn-icon { width: 40px; padding: 0; }
@media (pointer: coarse) { .btn-icon { width: 44px; } }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: var(--spacing-50);
  padding: var(--spacing-25) var(--spacing-75);
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.badge i { font-size: 0.875rem; }
.badge-success { background-color: var(--surface-success-subtle); color: var(--text-success-inverted); }
.badge-info { background-color: var(--surface-info-subtle); color: var(--text-info-inverted); }
.badge-warning { background-color: var(--surface-warning-subtle); color: var(--text-warning-inverted); }
.badge-error { background-color: var(--surface-error-subtle); color: var(--text-error-inverted); }
.badge-neutral { background-color: var(--surface-secondary); color: var(--text-secondary); }

/* ---------- Form fields ---------- */
.field { display: grid; gap: var(--spacing-50); }
.input, .select {
  width: 100%;
  min-height: 44px;
  padding: var(--spacing-75) var(--spacing-100);
  background-color: var(--surface-input);
  border: 1px solid var(--border-action-secondary);
  border-radius: var(--radius-8);
  color: var(--text-primary);
  transition: border-color 300ms var(--ease), background-color 300ms var(--ease);
}
.input:hover, .select:hover { border-color: var(--border-tertiary); background-color: var(--surface-primary-hover); }
.input:focus-visible, .select:focus-visible { outline: 2px solid var(--border-focus); outline-offset: 1px; border-color: var(--border-focus); }
.input[aria-invalid="true"] { border-color: var(--border-error); }
.input:disabled, .select:disabled { color: var(--text-primary-disabled); border-color: var(--border-primary-disabled); cursor: not-allowed; }
.select-wrap { position: relative; }
.select { appearance: none; padding-right: var(--spacing-500); cursor: pointer; }
.select-wrap i { position: absolute; right: var(--spacing-100); top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--icon-subtle); }
.field-error { display: flex; align-items: center; gap: var(--spacing-50); color: var(--text-error); }
.field-error[hidden] { display: none; }

/* ---------- Navigation (B7) ---------- */
.nav {
  position: fixed; top: var(--spacing-200); left: 50%; z-index: 50;
  transform: translateX(-50%);
  width: max-content; max-width: calc(100% - var(--spacing-400));
  display: flex; align-items: center; gap: var(--spacing-200);
  padding: var(--spacing-75);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-16);
  background-color: color-mix(in srgb, var(--surface-primary-subtle) 72%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: var(--spacing-75); padding: var(--spacing-50) var(--spacing-75); border-radius: var(--radius-8); }
.brand-mark { width: 24px; height: 24px; }
.nav-links { display: flex; align-items: center; gap: var(--spacing-25); }
.nav-links a {
  display: inline-flex; align-items: center; min-height: 40px;
  padding: var(--spacing-75) var(--spacing-100);
  border-radius: var(--radius-8);
  color: var(--text-secondary);
  transition: background-color 300ms var(--ease), color 300ms var(--ease);
}
.nav-links a:hover { background-color: var(--surface-primary-hover); color: var(--text-primary); }
.nav-links a[aria-current="page"] { color: var(--text-primary); background-color: var(--surface-primary-selected); }
.nav-actions { display: flex; align-items: center; gap: var(--spacing-50); }
.menu-toggle { display: none; }

.menu-lines { position: relative; width: 18px; height: 12px; }
.menu-lines span {
  position: absolute; left: 0; width: 18px; height: 2px; border-radius: var(--radius-2);
  background-color: var(--icon-default);
  transition: transform 500ms var(--ease);
}
.menu-lines span:first-child { top: 0; }
.menu-lines span:last-child { bottom: 0; }
.menu-toggle[aria-expanded="true"] .menu-lines span:first-child { transform: translateY(5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-lines span:last-child { transform: translateY(-5px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 40;
  padding: var(--spacing-900) var(--spacing-300) var(--spacing-600);
  background-color: color-mix(in srgb, var(--surface-primary) 92%, transparent);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  opacity: 0; visibility: hidden;
  transition: opacity 300ms var(--ease), visibility 0s linear 300ms;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; transition: opacity 300ms var(--ease); }
.mobile-menu ul { display: grid; gap: var(--spacing-200); }
.mobile-menu li { opacity: 0; transform: translateY(24px); transition: opacity 500ms var(--ease), transform 500ms var(--ease); }
.mobile-menu.is-open li { opacity: 1; transform: none; }
.mobile-menu.is-open li:nth-child(1) { transition-delay: 0ms; }
.mobile-menu.is-open li:nth-child(2) { transition-delay: 60ms; }
.mobile-menu.is-open li:nth-child(3) { transition-delay: 120ms; }
.mobile-menu.is-open li:nth-child(4) { transition-delay: 180ms; }
.mobile-menu.is-open li:nth-child(5) { transition-delay: 240ms; }
.mobile-menu a { display: block; padding-block: var(--spacing-75); }
.mobile-menu a[aria-current="page"] { color: var(--text-info); }
.mobile-menu .btn { margin-top: var(--spacing-300); width: 100%; }

@media (max-width: 820px) {
  .nav { width: calc(100% - var(--spacing-400)); justify-content: space-between; }
  .nav-links, .nav-actions .nav-cta { display: none; }
  .menu-toggle { display: inline-flex; }
}
body.menu-open { overflow: hidden; }

/* ---------- Footer ---------- */
.footer { padding-bottom: var(--spacing-600); }
.footer > .container { position: relative; padding-top: var(--spacing-600); }
.footer > .container::before { content: ''; position: absolute; top: 0; left: var(--spacing-300); right: var(--spacing-300); height: 1px; background-color: var(--border-primary); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--spacing-300); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--spacing-100); }
.footer-links a { color: var(--text-tertiary); padding: var(--spacing-50); border-radius: var(--radius-4); transition: color 300ms var(--ease); }
.footer-links a:hover { color: var(--text-primary); }
@media (max-width: 640px) { .footer > .container::before { left: var(--spacing-200); right: var(--spacing-200); } }

/* ---------- Scroll reveal (B7) ---------- */
/* Content is visible by default. It only starts hidden once site.js has the observer running
   (html.reveal-ready), so a slow or failed script, or reduced motion, still shows the whole page. */
.reveal-ready .reveal { opacity: 0; transform: translateY(32px); transition: opacity 700ms var(--ease), transform 700ms var(--ease); }
.reveal-ready .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Skeleton ---------- */
.skeleton { background-color: var(--surface-secondary); border-radius: var(--radius-8); animation: pulse 1400ms var(--ease) infinite alternate; }
@keyframes pulse { from { opacity: 1; } to { opacity: 0.45; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mobile-menu li { transform: none; }
  .skeleton { animation: none; }
  .btn:active:not(:disabled) { transform: none; }
}