:root {
  --bg-dark: #2B3546;
  --bg-light: #FFFFFF;
  --bg-input: #F5F6F8;

  --light-title: #111823;
  --light-text: #606975;
  --light-accent: #2458F5;

  --dark-title: #FFFFFF;
  --dark-text: #AEB8CB;
  --dark-accent: #8CA9FF;

  --primary: #2458F5;
  --primary-hover: #1A47D4;
  --border-light: #E3E6EB;
  --border-dark: rgba(174, 184, 203, 0.35);

  --error-text: #C0392B;
  --error-bg: #FDECEC;
  --error-border: #F5C2C0;

  --radius: 16px;
  --radius-sm: 8px;
  --container: 1280px;
  --gutter: clamp(16px, 5vw, 80px);
  --section-y: clamp(64px, 9vw, 112px);
}

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

* { margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--light-text);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

section[id] { scroll-margin-top: 80px; }

:focus-visible {
  outline: 3px solid var(--dark-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -100px; left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  border-radius: var(--radius-sm);
}
.skip-link:focus { top: 16px; }

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.band-dark { background: var(--bg-dark); color: var(--dark-text); }
.band-light { background: var(--bg-light); color: var(--light-text); }

.band-dark h1, .band-dark h2, .band-dark h3 { color: var(--dark-title); }
.band-light h1, .band-light h2, .band-light h3 { color: var(--light-title); }

h1, h2, h3 { font-weight: 500; line-height: 1.15; letter-spacing: -0.02em; }

.text-lg { font-size: 18px; }

.icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  background: currentColor;
}
.eyebrow--plain::before { display: none; }

.band-light .eyebrow { color: var(--light-accent); }
.band-dark .eyebrow { color: var(--dark-accent); }

.section-title {
  font-size: clamp(32px, 4.5vw, 48px);
  margin-bottom: 24px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px 48px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.section-head .section-title { margin-bottom: 0; }
.section-head__aside { max-width: 360px; font-size: 16px; }
.section-head__aside.text-lg { font-size: 18px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 48px;
  padding: 12px 24px;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .2s, transform .2s;
}
.btn--lg { min-height: 56px; padding-inline: 24px 28px; gap: 28px; }

.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-hover); }
.btn--primary:active { transform: translateY(1px); }

.btn--ghost { background: transparent; color: var(--dark-title); padding-inline: 4px; gap: 12px; }
.btn--ghost:hover { color: var(--dark-accent); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  font-weight: 600;
}
.link-arrow:hover { text-decoration: underline; text-underline-offset: 4px; }
.band-dark .link-arrow { color: var(--dark-accent); }

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}
.checks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--light-title);
}
.checks li::before {
  content: "";
  width: 12px; height: 7px;
  border-left: 2px solid var(--light-accent);
  border-bottom: 2px solid var(--light-accent);
  transform: rotate(-45deg) translateY(-2px);
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 96px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--dark-title);
}
.brand__logo { width: 30px; height: 28px; }
.brand__name { font-size: 28px; font-weight: 400; letter-spacing: -0.02em; line-height: 1; }

.nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: space-between;
  margin-left: clamp(24px, 14vw, 210px);
}
.nav__list { display: flex; gap: 32px; }
.nav__list a {
  font-size: 14px;
  color: var(--dark-text);
  transition: color .2s;
}
.nav__list a:hover { color: var(--dark-title); }
.nav__cta { font-size: 15px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 12px 10px;
  background: transparent;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  background: var(--dark-title);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero { padding-top: clamp(32px, 5vw, 64px); }

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
}

.hero__title {
  font-size: clamp(40px, 6.2vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 32px;
  max-width: 560px;
}
.highlight { color: var(--dark-accent); }

.hero__lead {
  font-size: 19px;
  max-width: 560px;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  margin-bottom: 36px;
}

.hero__note {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.hero__visual {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: #060A15;
  margin-right: calc(var(--gutter) * -0.4);
}
.hero__visual img { width: 100%; aspect-ratio: 660 / 548; object-fit: cover; }
.hero__visual figcaption {
  position: absolute;
  left: 24px; bottom: 20px;
  font-size: 16px;
  color: var(--dark-text);
}

.hero__strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 32px;
  margin-top: clamp(48px, 6vw, 88px);
  padding-block: 28px;
}
.hero__strip-title {
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.dot-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--dark-title);
}
.dot-item::before {
  content: "";
  width: 5px; height: 5px;
  background: var(--dark-accent);
}

.about {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px 96px;
  align-items: center;
}
.about__text p:not(.eyebrow) { margin-bottom: 20px; max-width: 600px; }
.about__text p.text-lg { margin-bottom: 24px; }
.about__text .checks { margin-top: 32px; }

.about__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}
.about__media img { width: 100%; aspect-ratio: 568 / 382; object-fit: cover; }
.about__badge {
  position: absolute;
  left: 20px; bottom: 20px;
  right: 20px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  padding: 14px 16px;
  background: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--light-title);
}
.about__badge .icon { color: var(--light-accent); width: 20px; height: 20px; }

.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  color: var(--light-text);
}
.card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}
.card__icon {
  width: 28px; height: 28px;
  fill: none;
  stroke: var(--light-accent);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card__num { font-size: 14px; color: var(--light-text); }
.card__title { font-size: clamp(22px, 2vw, 26px); margin-bottom: 16px; }
.band-dark .card__title { color: var(--light-title); }
.card p { font-size: 16px; }
.card__tags {
  margin-top: auto;
  padding-top: 20px;
  font-size: 14px !important;
  font-weight: 500;
  color: var(--light-accent);
}

.card--cta {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.card--cta .card__icon { stroke: #fff; margin-bottom: 32px; }
.band-dark .card--cta .card__title { color: #fff; font-size: clamp(24px, 2.2vw, 28px); margin-bottom: 12px; }
.card--cta p { color: #fff; margin-bottom: 32px; }
.card--cta .link-arrow { margin-top: auto; color: #fff; }

.why {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 48px 80px;
}
.why__intro .text-lg { max-width: 440px; }

.benefits {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 40px;
}
.benefit__icon {
  width: 26px; height: 26px;
  margin-bottom: 16px;
  fill: none;
  stroke: var(--light-accent);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.benefit__title { font-size: 21px; margin-bottom: 20px; }

.partnership {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px 40px;
  margin-top: clamp(56px, 7vw, 96px);
}
.partnership::before {
  content: "";
  flex-basis: 100%;
  height: 1px;
  background: var(--light-title);
  margin-bottom: 36px;
}
.partnership > p { font-size: 14px; }

.cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case .eyebrow { margin: 32px 0 16px; }
.case__title { font-size: clamp(21px, 1.9vw, 24px); margin-bottom: 20px; }
.case > p:last-child { font-size: 16px; }

.mock {
  height: 260px;
  padding: 28px 28px 0;
  border-radius: var(--radius);
  overflow: hidden;
}
.mock--blue { background: linear-gradient(135deg, #EEF2FF, #DCE5FF); }
.mock--lavender { background: linear-gradient(135deg, #E3E8FA, #D3DBF5); }
.mock--mint { background: linear-gradient(135deg, #E6EEF0, #D4E2E2); }

.mock__window {
  height: 100%;
  padding: 18px;
  background: #fff;
  border-radius: 10px 10px 0 0;
  color: var(--light-title);
  font-size: 14px;
}
.mock__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.mock__dots {
  width: 24px; height: 5px;
  background: radial-gradient(circle, #D6DAE1 2px, transparent 2.5px) 0 0 / 8px 5px repeat-x;
}
.mock__label { font-size: 14px; font-weight: 600; text-transform: uppercase; }
.mock__circle { width: 14px; height: 14px; border-radius: 50%; background: #E4EAFD; }
.mock__title { font-size: 17px; font-weight: 600; margin-bottom: 16px; }

.mock__days { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-bottom: 18px; }
.mock__days span {
  padding: 8px 0;
  text-align: center;
  background: #F1F3F6;
  border-radius: 4px;
  line-height: 1.6;
  color: var(--light-text);
}
.mock__days .is-active { background: var(--primary); color: #fff; }
.mock__caption { color: var(--light-text); text-transform: uppercase; margin-bottom: 10px; }
.mock__times { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mock__times span {
  padding: 6px 0;
  text-align: center;
  font-weight: 600;
  border: 1px solid var(--border-light);
  border-radius: 4px;
}

.mock__tabs { display: flex; gap: 14px; margin-bottom: 12px; color: var(--light-text); }
.mock__tabs strong { color: var(--light-title); font-weight: 600; }
.mock__row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  margin-bottom: 10px;
  background: #F4F5F8;
  border-radius: 4px;
  font-weight: 600;
}
.mock__row::before {
  content: "";
  width: 12px; height: 12px;
  border: 2px solid var(--primary);
  border-radius: 50%;
}

.mock__project {
  display: flex;
  flex-direction: column;
  padding: 14px 18px 14px 52px;
  margin-bottom: 18px;
  background: #0F1624;
  border-radius: 6px;
  position: relative;
}
.mock__project::before {
  content: "";
  position: absolute;
  left: 16px; top: 50%;
  width: 20px; height: 15px;
  border: 1.5px solid #8CA9FF;
  border-radius: 3px;
  transform: translateY(-50%);
}
.mock__project strong { color: #fff; font-weight: 500; }
.mock__project span { color: var(--dark-text); }
.mock__doc { display: flex; justify-content: space-between; font-weight: 600; }
.mock__doc::after { content: "↗"; color: var(--primary); }

.footnote { margin-top: 56px; font-size: 14px; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.step { position: relative; }
.step::before {
  content: "";
  position: absolute;
  top: 23px; left: 62px; right: 0;
  height: 1px;
  background: #C7CCD4;
}
.step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  margin-bottom: 36px;
  border: 1px solid var(--light-accent);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 500;
  color: var(--light-accent);
}
.step__title { font-size: clamp(22px, 2vw, 26px); margin-bottom: 24px; }
.step p { font-size: 16px; }
.step__result {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 14px !important;
  font-weight: 500;
  color: var(--light-accent);
}
.step__result::before { content: "↳"; font-size: 16px; }

.faq {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px 80px;
  align-items: start;
}
.faq__intro .section-title { max-width: 360px; }
.faq__intro p:not(.eyebrow) { max-width: 380px; margin-bottom: 40px; }

.faq__list { border-top: 1px solid var(--dark-text); }
.faq__item { border-bottom: 1px solid var(--dark-text); }
.faq__item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 28px 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--dark-title);
  cursor: pointer;
  list-style: none;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 24px;
  line-height: 1;
  color: var(--dark-accent);
}
.faq__item[open] summary::after { content: "−"; }
.faq__item summary:hover { color: var(--dark-accent); }
.faq__item p { padding-bottom: 28px; margin-top: -12px; font-size: 15px; }

.contact { position: relative; }

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 80px;
}

.contact__title {
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.12;
  margin-bottom: 72px;
  max-width: 520px;
}
.contact__subtitle { color: var(--light-accent) !important; font-size: 14px; font-weight: 500; }

.next-steps li {
  display: flex;
  gap: 14px;
  font-size: 14px;
  margin-bottom: 18px;
}
.next-steps span { color: var(--light-accent); }

.contact__location {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  font-size: 14px;
}
.contact__location .icon { color: var(--light-accent); }

.form__title { font-size: clamp(24px, 2.4vw, 28px); margin-bottom: 12px; }
.form__hint { font-size: 14px; margin-bottom: 28px; }

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--light-title);
}
.field input,
.field textarea {
  display: block;
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  color: var(--light-title);
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; }
.field textarea[rows="4"] { min-height: 126px; }

.field textarea.auto-grow {
  resize: none;
  overflow: hidden;
  field-sizing: content;
}

.field input::placeholder,
.field textarea::placeholder { color: var(--light-text); opacity: 1; }

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 88, 245, 0.18);
}

.field.is-invalid input,
.field.is-invalid textarea {
  border-color: var(--error-border);
  background: #FFF7F7;
}
.field__error {
  font-size: 14px;
  color: var(--error-text);
  margin-top: 6px;
}
.field__error:empty { display: none; }

.form__privacy {
  display: flex;
  gap: 10px;
  margin: 8px 0 24px;
  font-size: 14px;
}
.form__privacy .icon { margin-top: 2px; }

.form__alert {
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--error-text);
}
.form__alert[hidden] { display: none; }

.popup {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(17, 24, 35, 0.45);
}
.popup[hidden] { display: none; }
.popup__box {
  width: min(420px, 100%);
  padding: 40px 32px 32px;
  background: #2B3546;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 24px 60px rgba(17, 24, 35, 0.35);
}
.popup__text {
  font-size: 21px;
  font-weight: 500;
  color: #FFFFFF;
  margin-bottom: 28px;
}
.popup__close {
  min-height: 44px;
  padding: 10px 28px;
  background: var(--primary);
  color: #FFFFFF;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.popup__close:hover { background: var(--primary-hover); }

.footer { padding-top: 64px; }

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 0.9fr 1.4fr auto;
  gap: 40px;
}
.footer__brand .brand__name { font-size: 28px; }
.footer__brand p { max-width: 330px; margin-top: 28px; font-size: 14px; }

.footer__heading {
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}
.footer__nav li { margin-bottom: 14px; }
.footer__nav a { font-size: 14px; color: var(--dark-text); transition: color .2s; }
.footer__nav a:hover { color: var(--dark-title); }

.footer__top {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  color: var(--dark-title);
  border-radius: 50%;
}
.footer__top:hover { background: rgba(255, 255, 255, 0.08); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 32px;
  padding-block: 72px 40px;
  font-size: 14px;
}

@media (max-width: 1100px) {
  .services,
  .cases { grid-template-columns: repeat(2, 1fr); }

  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 48px; }

  .why { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__top { position: absolute; right: var(--gutter); }
  .footer__grid { position: relative; }
}

@media (max-width: 960px) {
  .nav-toggle { display: flex; }

  .nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 24px;
    margin: 0;
    padding: 8px var(--gutter) 28px;
    background: var(--bg-dark);
    border-top: 1px solid var(--border-dark);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav__list { flex-direction: column; gap: 0; }
  .nav__list a { display: block; padding: 14px 0; font-size: 14px; }

  .header__inner { min-height: 76px; }

  .hero__grid,
  .about,
  .faq,
  .contact__grid { grid-template-columns: 1fr; }

  .hero__visual { margin-right: 0; }
  .hero__title { max-width: none; }

  .contact__title { margin-bottom: 40px; }
}

@media (max-width: 640px) {
  .services,
  .cases,
  .steps,
  .benefits,
  .form__row { grid-template-columns: 1fr; }

  .form__row { gap: 0; }

  .hero__actions .btn { width: 100%; }
  .hero__actions .btn--ghost { justify-content: flex-start; }

  .hero__strip { flex-direction: column; align-items: flex-start; }

  .section-head { flex-direction: column; align-items: flex-start; }

  .about__badge { position: static; width: 100%; border-radius: 0; border: 1px solid var(--border-light); border-top: 0; }

  .mock { padding: 20px 20px 0; }

  .form .btn { width: 100%; }

  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; }
}