:root {
  --color-bg: #F4F4F2;
  --color-surface: #FFFFFF;
  --color-graphite: #2B2D31;
  --color-accent: #E67E22;
  --color-accent-alt: #F4B400;
  --color-neutral: #555555;
  --color-line: #DDDDD8;
  --radius: 6px;
  --shadow-sm: 4px 4px 0 rgba(43, 45, 49, 0.06);
  --shadow-md: 8px 8px 0 rgba(43, 45, 49, 0.08);
  --shadow-lg: 12px 12px 0 rgba(43, 45, 49, 0.10);
  --font-main: 'Inter', 'Segoe UI', Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-neutral);
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--color-graphite);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 16px 38px;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-graphite);
  background-color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.btn:hover {
  color: var(--color-graphite);
  background-color: var(--color-accent-alt);
  border-color: var(--color-accent-alt);
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-md);
}

.btn--dark {
  color: var(--color-surface);
  background-color: var(--color-graphite);
  border-color: var(--color-graphite);
}

.btn--dark:hover {
  color: var(--color-graphite);
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 3px solid var(--color-graphite);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding-top: 14px;
  padding-bottom: 14px;
}

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

.brand__img {
  width: 44px;
  height: 44px;
  border-radius: 4px;
}

.brand__name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-graphite);
  text-transform: uppercase;
}

.brand__name span {
  color: var(--color-accent);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.site-nav__link {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-graphite);
  border: 2px solid transparent;
  border-radius: 4px;
  transition: border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.site-nav__link:hover,
.site-nav__link--active {
  color: var(--color-accent);
  border-color: var(--color-graphite);
  transform: translateY(-2px);
}

.site-header__cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.site-header__phone {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-graphite);
  white-space: nowrap;
}

.burger {
  display: none;
  width: 48px;
  height: 48px;
  padding: 10px;
  background: var(--color-graphite);
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.burger__line {
  display: block;
  height: 3px;
  margin: 5px 0;
  background-color: var(--color-surface);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.burger--open .burger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.burger--open .burger__line:nth-child(2) {
  opacity: 0;
}

.burger--open .burger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  flex-direction: column;
  justify-content: center;
  padding: 40px 32px;
  background-color: var(--color-graphite);
}

.mobile-menu--open {
  display: flex;
}

.mobile-menu__close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  font-size: 28px;
  line-height: 1;
  color: var(--color-surface);
  background: transparent;
  border: 2px solid var(--color-surface);
  border-radius: 4px;
  cursor: pointer;
}

.mobile-menu__list {
  list-style: none;
  margin-bottom: 40px;
}

.mobile-menu__link {
  display: block;
  padding: 14px 0;
  font-size: 26px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-surface);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.mobile-menu__link:hover {
  color: var(--color-accent);
}

.mobile-menu__contacts p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  margin-bottom: 6px;
}

.mobile-menu__contacts strong {
  color: var(--color-surface);
}

.mobile-menu__contacts a {
  color: var(--color-accent);
}

/* ---------- Sections ---------- */

.section {
  position: relative;
  padding: 96px 0;
  overflow: hidden;
}

.section--dark {
  background-color: var(--color-graphite);
  color: rgba(255, 255, 255, 0.78);
}

.section--dark .section__title,
.section--dark .card__title {
  color: var(--color-surface);
}

.section--tight {
  padding: 64px 0;
}

.section__head {
  max-width: 720px;
  margin-bottom: 56px;
  position: relative;
  z-index: 2;
}

.section__head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__kicker {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 18px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-graphite);
  background-color: var(--color-accent-alt);
  border-radius: 3px;
}

.section__title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-graphite);
  margin-bottom: 16px;
}

.section__lead {
  font-size: 17px;
}

/* Decorative geometry */

.section--dark::before,
.deco-grid::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 320px;
  background-image:
    linear-gradient(rgba(230, 126, 34, 0.14) 2px, transparent 2px),
    linear-gradient(90deg, rgba(230, 126, 34, 0.14) 2px, transparent 2px);
  background-size: 40px 40px;
  pointer-events: none;
}

.deco-grid::before {
  background-image:
    linear-gradient(rgba(43, 45, 49, 0.07) 2px, transparent 2px),
    linear-gradient(90deg, rgba(43, 45, 49, 0.07) 2px, transparent 2px);
}

.deco-square {
  position: absolute;
  width: 140px;
  height: 140px;
  background-color: var(--color-accent);
  opacity: 0.12;
  pointer-events: none;
}

.deco-square--alt {
  background-color: var(--color-accent-alt);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 110px 0 120px;
  background-color: var(--color-graphite);
  color: rgba(255, 255, 255, 0.78);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  left: -80px;
  bottom: -80px;
  width: 280px;
  height: 280px;
  background-color: var(--color-accent);
  opacity: 0.16;
  transform: rotate(12deg);
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-surface);
  margin-bottom: 22px;
}

.hero__title span {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: 18px;
  max-width: 520px;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__banner {
  position: relative;
}

.hero__banner::before {
  content: "";
  position: absolute;
  top: -18px;
  right: -18px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--color-accent);
  border-radius: var(--radius);
}

.hero__img {
  position: relative;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero--page {
  padding: 90px 0;
}

.hero--page .hero__inner {
  grid-template-columns: 1fr;
}

/* ---------- Cards ---------- */

.grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 28px;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  position: relative;
  padding: 36px 30px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-lg);
  border-left-color: var(--color-graphite);
}

.section--dark .card {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.14);
  border-left-color: var(--color-accent);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  color: var(--color-graphite);
  background-color: var(--color-accent-alt);
  border-radius: 4px;
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.card:hover .card__icon {
  transform: translate(4px, -4px);
  background-color: var(--color-accent);
}

.card__icon svg {
  width: 28px;
  height: 28px;
}

.card__img {
  width: 100%;
  margin-bottom: 24px;
  border-radius: 4px;
  border: 1px solid var(--color-line);
}

.card__title {
  font-size: 21px;
  font-weight: 800;
  color: var(--color-graphite);
  margin-bottom: 12px;
}

.card__text {
  font-size: 15px;
}

.card__price {
  display: inline-block;
  margin-top: 18px;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 800;
  color: var(--color-graphite);
  background-color: var(--color-accent-alt);
  border-radius: 3px;
}

/* ---------- Split blocks ---------- */

.split {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split--wide-left {
  grid-template-columns: 1.3fr 1fr;
}

.split--wide-right {
  grid-template-columns: 1fr 1.3fr;
}

.media-frame {
  position: relative;
}

.media-frame::before {
  content: "";
  position: absolute;
  top: 20px;
  left: -20px;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  border-radius: var(--radius);
  opacity: 0.85;
}

.media-frame--right::before {
  left: auto;
  right: -20px;
}

.media-frame__img {
  position: relative;
  width: 100%;
  border-radius: var(--radius);
  border: 3px solid var(--color-graphite);
}

.rich-text h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-graphite);
  margin: 26px 0 12px;
}

.rich-text p {
  margin-bottom: 16px;
}

.rich-text ul,
.rich-text ol {
  margin: 0 0 16px 22px;
}

.rich-text li {
  margin-bottom: 8px;
}

.check-list {
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 12px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.check-list li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 7px;
  width: 8px;
  height: 5px;
  border-left: 2px solid var(--color-surface);
  border-bottom: 2px solid var(--color-surface);
  transform: rotate(-45deg);
}

/* ---------- Stats ---------- */

.stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stats__item {
  padding: 34px 26px;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-top: 5px solid var(--color-accent-alt);
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.stats__item:hover {
  transform: translateY(-6px);
  border-top-color: var(--color-accent);
}

.stats__value {
  font-size: 46px;
  font-weight: 800;
  color: var(--color-surface);
  line-height: 1.1;
}

.stats__value span {
  color: var(--color-accent);
}

.stats__label {
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
}

/* ---------- Steps ---------- */

.steps {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 34px 26px 30px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  counter-increment: step;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-md);
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 18px;
  font-size: 18px;
  font-weight: 800;
  color: var(--color-surface);
  background-color: var(--color-graphite);
  border-radius: 3px;
}

.step:hover::before {
  background-color: var(--color-accent);
}

.step__title {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-graphite);
  margin-bottom: 10px;
}

.step__text {
  font-size: 14px;
}

/* ---------- Forms ---------- */

.form {
  position: relative;
  z-index: 2;
  padding: 44px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 5px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}

.form__field--full {
  grid-column: 1 / -1;
}

.form__label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-graphite);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-main);
  font-size: 15px;
  color: var(--color-graphite);
  background-color: var(--color-bg);
  border: 2px solid var(--color-line);
  border-radius: 4px;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.form__input--error,
.form__textarea--error {
  border-color: #C0392B;
}

.form__textarea {
  min-height: 130px;
  resize: vertical;
}

.form__error {
  display: none;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  color: #C0392B;
}

.form__error--visible {
  display: block;
}

.form__note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-neutral);
}

.form__success {
  display: none;
  padding: 16px 20px;
  margin-bottom: 22px;
  font-weight: 700;
  color: var(--color-graphite);
  background-color: #DFF0D8;
  border-left: 5px solid #3C763D;
  border-radius: 4px;
}

.form__success--visible {
  display: block;
}

/* ---------- Contact block ---------- */

.contact-list {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 26px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-md);
}

.contact-item__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  color: var(--color-surface);
  background-color: var(--color-graphite);
  border-radius: 4px;
}

.contact-item__icon svg {
  width: 24px;
  height: 24px;
}

.contact-item__label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-neutral);
  margin-bottom: 4px;
}

.contact-item__value {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-graphite);
}

/* ---------- Legal pages ---------- */

.legal {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  padding: 52px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.legal h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-graphite);
  margin: 34px 0 14px;
  padding-left: 16px;
  border-left: 5px solid var(--color-accent);
}

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

.legal p {
  margin-bottom: 14px;
}

.legal ul {
  margin: 0 0 16px 24px;
}

.legal li {
  margin-bottom: 8px;
}

/* ---------- Footer ---------- */

.site-footer {
  background-color: var(--color-graphite);
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: 56px;
  padding: 72px 0 56px;
}

.site-footer .brand__name {
  color: var(--color-surface);
}

.site-footer__about {
  margin-top: 18px;
  font-size: 14px;
  max-width: 320px;
}

.site-footer__heading {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-surface);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--color-accent);
  display: inline-block;
}

.site-footer__list {
  list-style: none;
}

.site-footer__list li {
  margin-bottom: 10px;
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.site-footer__list a:hover {
  color: var(--color-accent);
}

.site-footer__contact p {
  margin-bottom: 10px;
  font-size: 14px;
}

.site-footer__contact strong {
  color: var(--color-surface);
  font-weight: 700;
}

.site-footer__contact a {
  color: var(--color-accent);
}

.site-footer__reg {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__bottom {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .hero__inner,
  .split,
  .split--wide-left,
  .split--wide-right {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .grid--4,
  .stats,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .section__title {
    font-size: 29px;
  }

  .hero {
    padding: 70px 0 80px;
  }

  .hero__title {
    font-size: 36px;
  }

  .site-nav,
  .site-header__cta {
    display: none;
  }

  .burger {
    display: block;
  }

  .grid--3,
  .grid--2,
  .contact-list,
  .form__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
  }

  .form,
  .legal {
    padding: 28px 22px;
  }

  .media-frame::before {
    top: 12px;
    left: -12px;
  }

  .media-frame--right::before {
    right: -12px;
  }
}

@media (max-width: 520px) {
  .grid--4,
  .stats,
  .steps {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: 30px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}