:root {
  --bg: #ffffff;
  --bg-soft: #f6faf9;
  --text: #17211f;
  --muted: #5d6b68;
  --line: #dfe9e7;
  --accent: #0f766e;
  --accent-dark: #0b4f4b;
  --accent-soft: #e6f4f2;
  --blue: #2563eb;
  --shadow: 0 18px 48px rgba(15, 42, 38, 0.08);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px max(24px, calc((100vw - var(--max)) / 2));
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(223, 233, 231, 0.88);
  backdrop-filter: blur(14px);
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-dark);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand strong {
  font-size: 1rem;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 650;
}

.site-nav a,
.header-phone {
  transition: color 160ms ease;
}

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

.header-phone {
  color: var(--accent-dark);
  font-weight: 800;
}

.section {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: calc(100vh - 80px);
  overflow: hidden;
  background-image:
    linear-gradient(90deg, rgba(7, 25, 23, 0.84) 0%, rgba(7, 25, 23, 0.68) 37%, rgba(7, 25, 23, 0.22) 67%, rgba(7, 25, 23, 0.06) 100%),
    url("assets/hero-klimatyzacja-pokoj.jpg");
  background-position: center;
  background-size: cover;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  width: min(var(--max), calc(100% - 48px));
  min-height: calc(100vh - 80px);
  margin: 0 auto;
  padding: 86px 0 64px;
}

.hero h1,
.section-heading h2,
.benefit-panel h2,
.contact h2 {
  margin: 0;
  color: var(--text);
  font-weight: 820;
  letter-spacing: 0;
  line-height: 1.05;
}

.hero h1 {
  max-width: 780px;
  color: #fff;
  font-size: clamp(2.4rem, 7vw, 5.75rem);
  text-wrap: balance;
}

.hero-copy p {
  max-width: 660px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 13px 18px;
  font-size: 0.98rem;
  font-weight: 760;
  line-height: 1.2;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.hero .button-primary {
  background: #fff;
  color: var(--accent-dark);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.18);
}

.button-primary {
  background: var(--accent);
  color: #fff;
}

.button-secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--accent-dark);
}

.hero .button-secondary {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
  backdrop-filter: blur(10px);
}

.intro,
.services,
.benefits,
.contact {
  padding: 86px 0;
  border-top: 1px solid var(--line);
}

.intro {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  gap: 60px;
}

.section-heading h2,
.benefit-panel h2,
.contact h2 {
  font-size: clamp(2rem, 4vw, 3.7rem);
}

.section-heading p {
  max-width: 650px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.intro-text p {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.intro-text p + p {
  margin-top: 18px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.service-card {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  min-height: 218px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.service-card img {
  width: 148px;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}

.service-card h3 {
  margin: 0;
  color: var(--accent-dark);
  font-size: 1.18rem;
  line-height: 1.25;
}

.service-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.benefits {
  width: 100%;
  max-width: none;
  background: var(--bg-soft);
}

.benefit-panel {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.78fr 1fr;
  gap: 58px;
  align-items: start;
}

.benefit-panel ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.benefit-panel li {
  position: relative;
  padding: 18px 18px 18px 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
}

.benefit-panel li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.contact {
  display: grid;
  grid-template-columns: 1fr 0.74fr;
  gap: 58px;
  align-items: start;
}

.contact-copy p {
  max-width: 650px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.12rem;
}

.contact-card {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  font-style: normal;
}

.contact-line {
  display: block;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-weight: 650;
}

.contact-main {
  color: var(--accent-dark);
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  line-height: 1.1;
  font-weight: 850;
}

.site-footer {
  padding: 34px max(24px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 6px;
}

@media (max-width: 920px) {
  .site-header {
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }

  .hero,
  .intro,
  .benefit-panel,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero,
  .hero-inner {
    min-height: auto;
  }

  .hero {
    background-image:
      linear-gradient(180deg, rgba(7, 25, 23, 0.88) 0%, rgba(7, 25, 23, 0.74) 54%, rgba(7, 25, 23, 0.28) 100%),
      url("assets/hero-klimatyzacja-pokoj.jpg");
    background-position: 56% center;
  }

  .hero-inner {
    padding: 64px 0 82px;
  }

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

@media (max-width: 620px) {
  .section,
  .benefit-panel {
    width: min(100% - 32px, var(--max));
  }

  .site-header {
    padding: 14px 16px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .site-nav {
    font-size: 0.9rem;
  }

  .header-phone {
    font-size: 0.92rem;
  }

  .hero {
    gap: 34px;
    background-position: 58% center;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .intro,
  .services,
  .benefits,
  .contact {
    padding: 62px 0;
  }

  .service-card {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    min-height: 0;
    padding: 16px;
  }

  .service-card img {
    width: 96px;
  }

  .service-card h3 {
    font-size: 1.05rem;
  }

  .service-card p {
    font-size: 0.92rem;
  }

  .contact-card {
    padding: 22px;
  }
}