:root {
  --page-bg: #e5e7eb;
  --surface: #f9fafb;
  --surface-strong: #ffffff;
  --text: #111827;
  --text-soft: #6b7280;
  --text-muted: #9ca3af;
  --accent: #8b5cf6;
  --accent-dark: #6d39ea;
  --accent-soft: rgba(139, 92, 246, 0.12);
  --line: rgba(139, 92, 246, 0.55);
  --shadow-soft: 0 20px 50px rgba(17, 24, 39, 0.08);
  --shadow-card: 0 18px 45px rgba(17, 24, 39, 0.07);
  --radius-xl: 24px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --container-max: 1536px;
  --page-padding: clamp(16px, 4vw, 72px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(139, 92, 246, 0.08), transparent 24%),
    radial-gradient(circle at 85% 18%, rgba(139, 92, 246, 0.1), transparent 20%),
    var(--page-bg);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.page-shell {
  position: relative;
  overflow: clip;
}

.page-main,
.site-header,
.site-footer__inner {
  width: min(calc(100% - (var(--page-padding) * 2)), var(--container-max));
  margin-inline: auto;
}

.page-main {
  padding-bottom: 72px;
}

.section {
  margin-top: clamp(56px, 8vw, 92px);
  scroll-margin-top: 24px;
}

.site-header {
  margin-top: clamp(12px, 3vw, 28px);
  background: rgba(255, 255, 255, 0.96);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-soft);
  position: relative;
  z-index: 10;
}

.header-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 24px;
  padding: 18px clamp(20px, 3vw, 40px) 8px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__logo {
  width: auto;
  height: clamp(48px, 4.2vw, 64px);
  flex-shrink: 0;
}

.brand__name {
  font-size: clamp(1.15rem, 1.6vw, 1.55rem);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.header-right {
  justify-self: end;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  height: 68px;
}

.header-contact {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
}

.header-contact__phone {
  font-size: 36px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.header-contact__note {
  color: var(--text-soft);
  font-size: 24px;
  font-weight: 500;
}

.header-meta {
  grid-area: meta;
  min-height: 68px;
  display: flex;
  position: relative;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  margin-top: 0;
  padding-top: 0;
  padding-right: 12px;
  border-right: 1px solid var(--accent);
}

.header-meta p {
  margin: 0;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 25px;
  text-align: right;
  font-weight: 500;
}


.menu-toggle {
  width: 48px;
  height: 48px;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: 50%;
  color: var(--accent);
  border: 1px solid rgba(139, 92, 246, 0.2);
  transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.header-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "nav meta"
    "nav cta";
  align-items: end;
  column-gap: 22px;
  row-gap: 10px;
  padding: 0 clamp(20px, 3vw, 40px) 18px;
}

.header-nav-row {
  display: contents;
}

.site-nav {
  grid-area: nav;
  display: flex;
  align-items: center;
  gap: clamp(18px, 1.8vw, 32px);
  flex-wrap: wrap;
  align-self: end;
}

.site-nav a {
  font-size: 0.86rem;
  line-height: 1.2;
  font-weight: 700;
  position: relative;
  transition: color 0.25s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  transition: transform 0.3s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav a[href="#calculator"] {
  color: var(--accent);
}

.site-nav a[href="#calculator"]::after {
  transform: scaleX(1);
}

.header-cta {
  grid-area: cta;
  justify-self: end;
  min-height: 40px;
  padding-inline: 22px;
  font-size: 0.76rem;
}

.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1;
  font-weight: 800;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    background-color 0.25s ease,
    color 0.25s ease;
  overflow: hidden;
}

.button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 25%, rgba(255, 255, 255, 0.22) 50%, transparent 75%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
}

.button:hover::before,
.button:focus-visible::before {
  transform: translateX(120%);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 35px rgba(139, 92, 246, 0.22);
}

.button--primary {
  color: #fff;
  background: linear-gradient(180deg, #9d75ff 0%, var(--accent) 100%);
}

.button--full {
  width: 100%;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(420px, 0.97fr);
  gap: clamp(24px, 3vw, 32px);
  align-items: start;
}

.hero__content {
  display: grid;
  gap: clamp(24px, 3vw, 32px);
}

.hero-copy {
  max-width: 760px;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.1rem, 3.8vw, 3.55rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.hero-copy p {
  margin: 18px 0 0;
  max-width: 710px;
  font-size: clamp(1rem, 1.55vw, 1.25rem);
  line-height: 1.55;
  color: rgba(17, 24, 39, 0.88);
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transform-origin: center;
  animation: heroFloat 9s ease-in-out infinite;
}

.calculator-card,
.contact-card {
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3vw, 34px);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.section-heading {
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 2.6vw, 2.7rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.section-heading p {
  margin: 14px auto 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 740px;
}

.section-heading--compact {
  max-width: 420px;
  margin: 0 auto 24px;
}

.section-heading--compact h2 {
  font-size: clamp(1.8rem, 2.5vw, 2.45rem);
}

.section-heading--wide {
  max-width: 980px;
  margin-inline: auto;
}

.calculator-form,
.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.field {
  display: block;
}

.field--wide {
  grid-column: 1 / -1;
}

.field input,
.field textarea {
  width: 100%;
  border: 2px solid rgba(17, 24, 39, 0.72);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  padding: 13px 14px;
  transition:
    border-color 0.25s ease,
    box-shadow 0.25s ease,
    transform 0.25s ease;
}

.field input {
  min-height: 48px;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #9aa1ae;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.14);
  transform: translateY(-1px);
}

.calculator-form .button,
.contact-form .button {
  grid-column: 1 / -1;
  margin-top: 4px;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px 28px;
  margin-top: clamp(28px, 4vw, 40px);
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px;
  border-radius: var(--radius-md);
  transition:
    transform 0.28s ease,
    background-color 0.28s ease,
    box-shadow 0.28s ease;
}

.advantage-item:hover {
  background: rgba(255, 255, 255, 0.58);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.advantage-item img {
  width: clamp(74px, 7vw, 112px);
  height: auto;
  flex-shrink: 0;
}

.advantage-item h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  line-height: 1.2;
  font-weight: 800;
}

.advantage-item p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.96rem;
  line-height: 1.55;
}

.documents-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 2vw, 24px);
  margin-top: clamp(30px, 4vw, 42px);
}

.document-card {
  text-align: center;
}

.document-card__image {
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.document-card:hover .document-card__image {
  transform: translateY(-5px);
  box-shadow: 0 22px 46px rgba(17, 24, 39, 0.11);
}

.document-card img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
}

.document-card figcaption {
  margin-top: 12px;
  font-size: 0.92rem;
  line-height: 1.45;
  font-weight: 700;
}

.section-actions {
  display: flex;
  justify-content: center;
  margin-top: clamp(26px, 4vw, 34px);
}

.reviews-slider {
  position: relative;
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: clamp(28px, 4vw, 40px);
}

.slider-button {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid rgba(139, 92, 246, 0.75);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 26px rgba(139, 92, 246, 0.12);
  flex-shrink: 0;
  transition:
    transform 0.25s ease,
    opacity 0.25s ease,
    background-color 0.25s ease;
}

.slider-button span {
  display: grid;
  place-items: center;
  font-size: 2rem;
  line-height: 1;
}

.slider-button:hover,
.slider-button:focus-visible {
  background: rgba(139, 92, 246, 0.12);
  transform: scale(1.06);
}

.slider-button:disabled {
  opacity: 0.35;
  cursor: default;
  transform: none;
}

.reviews-track {
  --review-gap: 24px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - var(--review-gap)) / 2);
  gap: var(--review-gap);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  flex: 1;
}

.reviews-track::-webkit-scrollbar {
  display: none;
}

.review-card {
  position: relative;
  min-height: 294px;
  padding: clamp(24px, 3vw, 34px);
  background: rgba(249, 250, 251, 0.92);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.review-card::before {
  content: "";
  position: absolute;
  inset: auto auto 0 0;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
  transform: translate(-35%, 38%);
}

.review-card h3 {
  margin: 0;
  max-width: 94%;
  font-size: clamp(1.08rem, 1.45vw, 1.25rem);
  line-height: 1.45;
  font-weight: 800;
  position: relative;
  z-index: 1;
}

.review-card__author {
  margin: 20px 0 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.2;
  position: relative;
  z-index: 1;
}

.review-card__quote {
  position: absolute;
  right: 20px;
  bottom: 18px;
  width: 62px;
  height: auto;
  opacity: 0.38;
}

.contact-card {
  max-width: 1120px;
  margin-inline: auto;
}

.site-footer {
  background: #111827;
  color: #f9fafb;
  margin-top: clamp(60px, 8vw, 96px);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 30px 0;
}

.brand--footer .brand__name {
  color: #f9fafb;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
}

.footer-brand p {
  margin: 14px 0 0;
  max-width: 420px;
  color: rgba(249, 250, 251, 0.72);
  font-size: 0.85rem;
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-nav a {
  color: rgba(249, 250, 251, 0.92);
  font-size: 0.95rem;
  font-weight: 700;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.footer-contact a {
  font-size: 1.4rem;
  line-height: 1;
  font-weight: 800;
}

.footer-contact span {
  color: rgba(249, 250, 251, 0.72);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.75s cubic-bezier(0.2, 1, 0.3, 1),
    transform 0.75s cubic-bezier(0.2, 1, 0.3, 1);
  transition-delay: var(--delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes heroFloat {
  0%,
  100% {
    transform: scale(1.02) translateY(0);
  }
  50% {
    transform: scale(1.04) translateY(-6px);
  }
}

@media (max-width: 1200px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .calculator-card {
    max-width: 860px;
    margin-inline: auto;
  }

  .advantages-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .documents-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .footer-brand p {
    margin-inline: auto;
  }

  .footer-contact {
    align-items: center;
  }
}

@media (max-width: 1024px) {
  .header-bar {
    grid-template-columns: auto 1fr auto;
    padding: 16px 20px;
    gap: 16px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-contact {
    margin-left: auto;
  }

  .header-panel {
    display: block;
    max-height: 0;
    overflow: hidden;
    padding: 0 20px;
    transition: max-height 0.35s ease, padding-bottom 0.35s ease;
  }

  .site-header.is-open .header-panel {
    max-height: 520px;
    padding-bottom: 18px;
  }

  .site-header.is-open .menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header.is-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-open .menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .header-nav-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .site-nav {
    grid-area: auto;
    justify-content: space-between;
    gap: 14px;
  }

  .header-cta {
    grid-area: auto;
    width: 100%;
    min-height: 52px;
    font-size: 0.95rem;
  }

  .header-meta {
    grid-area: auto;
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
    margin-top: 18px;
    padding-top: 12px;
    border-top: 2px solid var(--line);
  }

  .hero-copy h1 {
    max-width: 820px;
  }

  .reviews-track {
    grid-auto-columns: 100%;
  }
}

@media (max-width: 767px) {
  .page-main {
    padding-bottom: 56px;
  }

  .site-header {
    border-radius: 0 0 18px 18px;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__logo {
    height: 54px;
  }

  .header-contact__phone {
    font-size: 1rem;
  }

  .header-contact__note {
    display: none;
  }

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

  .header-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    font-size: 0.75rem;
  }

  .header-meta p {
    font-size: 0.78rem;
    text-align: center;
  }

  .hero-copy h1 {
    font-size: clamp(1.95rem, 8vw, 2.55rem);
  }

  .hero-copy p {
    margin-top: 14px;
    font-size: 1rem;
    line-height: 1.5;
  }

  .calculator-card,
  .contact-card {
    padding: 24px 16px;
    border-radius: 18px;
  }

  .calculator-form,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .advantages-grid,
  .documents-grid {
    grid-template-columns: 1fr;
  }

  .advantage-item {
    padding: 10px 0;
  }

  .advantage-item img {
    width: 82px;
  }

  .reviews-slider {
    gap: 10px;
  }

  .slider-button {
    width: 40px;
    height: 40px;
  }

  .review-card {
    min-height: 250px;
    padding: 24px 20px;
  }

  .review-card__quote {
    width: 54px;
  }
}

@media (max-width: 420px) {
  .header-bar {
    grid-template-columns: minmax(0, 1fr) auto auto;
    padding: 14px 16px;
    gap: 12px;
  }

  .brand {
    gap: 9px;
  }

  .brand__name {
    font-size: 0.82rem;
    white-space: nowrap;
  }

  .header-contact__phone {
    font-size: 0.76rem;
  }

  .header-meta p {
    font-size: 0.68rem;
    text-align: center;
  }

  .section {
    margin-top: 44px;
  }

  .hero-copy h1 {
    font-size: 1.85rem;
  }

  .section-heading h2,
  .section-heading--compact h2 {
    font-size: 1.8rem;
  }

  .reviews-slider {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) 40px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}