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

html {
  scroll-behavior: smooth;
  /* Визуальный масштаб ≈ браузерный zoom 110% при системных 100% */
  font-size: 110%;
}

@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;
  font-family: var(--font-brand);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink-900);
  background: var(--surface-cold);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--brand-blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--brand-navy);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  padding: 0.75rem 1rem;
  background: var(--brand-cyan);
  color: var(--ink-950);
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(100% - (var(--pad-x) * 2), var(--content-max));
  margin-inline: auto;
}

.container--wide {
  width: min(100% - (var(--pad-x) * 2), var(--container-max));
}

/* На 1440: оболочка 1440, рабочая колонка 1280 по центру */
@media (min-width: 1440px) {
  .container--shell {
    width: min(100%, var(--container-max));
    margin-inline: auto;
    padding-inline: var(--pad-x);
  }

  .container--shell > .container,
  .container--shell .container {
    width: 100%;
    max-width: var(--content-max);
  }
}

.grid {
  display: grid;
  gap: var(--grid-gap, 1.5rem);
}

.grid-12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap, 1.5rem);
}

@media (max-width: 1023px) {
  .grid-12 {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .grid-12 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.section {
  padding-block: var(--section-y);
}

.section--cold {
  background: var(--surface-cold);
}

.section--mist {
  background:
    linear-gradient(180deg, #dbe5f1 0%, var(--surface-mist) 100%);
}

.section--ink {
  background: var(--ink-950);
  color: var(--surface-white);
}

.section--navy {
  background:
    radial-gradient(ellipse at 12% 0%, rgba(0, 173, 170, 0.14), transparent 42%),
    radial-gradient(ellipse at 88% 20%, rgba(31, 92, 211, 0.16), transparent 40%),
    linear-gradient(180deg, var(--surface-navy-mid) 0%, var(--surface-navy) 100%);
  color: var(--surface-white);
}

.section--ink a,
.section--navy a:not(.btn) {
  color: #9ec0ff;
}

.section--navy .eyebrow {
  color: var(--brand-cyan);
}

.section--ink .lead,
.section--navy .lead {
  color: rgba(232, 238, 247, 0.72);
}

.section--navy .btn--secondary {
  --btn-fg: #fff;
  --btn-bd: var(--line-dark);
}

.section--navy .link-arrow {
  color: #fff;
}

h1,
.h1 {
  margin: 0;
  font-size: var(--fs-h1);
  line-height: var(--lh-h1);
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

h2,
.h2 {
  margin: 0;
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

h3,
.h3 {
  margin: 0;
  font-size: var(--fs-h3);
  line-height: var(--lh-h3);
  font-weight: 600;
}

p {
  margin: 0;
}

.lead {
  font-size: var(--fs-body-lg);
  line-height: var(--lh-body-lg);
  color: var(--steel-700);
  max-width: 42rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stack-lg {
  gap: 1.5rem;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.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;
}