* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #17232a;
  background: #ffffff;
  line-height: 1.6;
}

a {
  color: inherit;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid #e5e9ea;
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 800;
}

.logo span {
  font-weight: 500;
}

nav {
  display: flex;
  gap: 28px;
}

nav a {
  text-decoration: none;
  font-weight: 600;
}

.menu-button {
  display: none;
  border: 0;
  background: transparent;
  font-size: 1.7rem;
  cursor: pointer;
}

.hero {
  min-height: 680px;
  display: flex;
  align-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, #14232c, #315b60);
}

.hero-content {
  max-width: 900px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  font-weight: 800;
  opacity: 0.7;
  margin-bottom: 15px;
}

.hero h1 {
  max-width: 850px;
  margin: 0 0 25px;
  font-size: clamp(2.7rem, 6vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.hero-text {
  max-width: 750px;
  font-size: 1.2rem;
  color: #e4edef;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.button {
  display: inline-block;
  padding: 13px 21px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 800;
  border: 0;
  cursor: pointer;
  font-size: 1rem;
}

.primary {
  background: #d6a13b;
  color: #151515;
}

.secondary {
  border: 1px solid rgba(255,255,255,0.5);
  color: #ffffff;
}

.light {
  background: #ffffff;
  color: #17232a;
}

.advantages {
  background: #d6a13b;
}

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

.advantages-grid div {
  padding: 25px 20px;
  display: flex;
  flex-direction: column;
}

.advantages-grid span {
  font-size: 0.85rem;
  opacity: 0.75;
}

.section {
  padding: 100px 0;
}

.section h2,
.cta h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
}

.section-intro {
  max-width: 780px;
  color: #65727a;
}

.service-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 45px;
}

.service-group {
  padding: 30px;
  border: 1px solid #e0e5e6;
  border-radius: 10px;
  background: #ffffff;
}

.service-group.winter {
  background: #f3f5f4;
}

.service-number {
  color: #9b721f;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.service-group h3 {
  font-size: 1.4rem;
  margin: 10px 0 15px;
}

.service-group ul {
  margin: 0;
  padding-left: 20px;
}

.service-group li {
  margin-bottom: 6px;
}

.dark {
  background: #14232c;
  color: #ffffff;
}

.dark p {
  color: #d0dadd;
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 75px;
}

.check-list {
  padding-left: 20px;
}

.check-list li {
  margin-bottom: 8px;
}

.highlight {
  margin-top: 25px;
  font-weight: 800;
  color: #d6a13b !important;
}

.cta {
  padding: 90px 0;
  background: #d6a13b;
}

.cta h2 {
  max-width: 800px;
}

.contact-box {
  margin-top: 30px;
  padding: 25px;
  background: #f3f5f4;
  border-radius: 8px;
}

.contact-box p {
  margin: 7px 0;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form label {
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  display: block;
  margin-top: 6px;
  padding: 12px;
  border: 1px solid #ccd4d7;
  border-radius: 5px;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

footer {
  background: #14232c;
  color: #d9e1e3;
  padding: 50px 0 20px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 30px;
}

.footer-grid p {
  color: #aebbc0;
}

.footer-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.footer-links a {
  text-decoration: none;
}

.copyright {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: 30px;
  padding-top: 20px;
  color: #91a0a6;
  font-size: 0.85rem;
}

@media (max-width: 800px) {

  .menu-button {
    display: block;
  }

  nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    padding: 20px 4%;
    background: #ffffff;
    flex-direction: column;
    gap: 12px;
  }

  nav.open {
    display: flex;
  }

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

  .service-groups,
  .two-column {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 520px) {

  .hero {
    min-height: 600px;
  }

  .hero h1 {
    font-size: 2.65rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .button {
    text-align: center;
  }

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

  .section {
    padding: 70px 0;
  }
}