:root {
  --bg: #0f141d;
  --text: #f5f7fb;
  --muted: #b8c3d4;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ff6b2d;
  --accent-2: #ff9f43;
  --max: 1160px;
  --shadow: 0 20px 45px rgba(0, 0, 0, 0.28);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Manrope", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 640px at 85% -8%, rgba(255, 159, 67, 0.22), transparent 60%),
    radial-gradient(900px 540px at 5% -15%, rgba(56, 189, 248, 0.15), transparent 62%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
}

h1 {
  font-family: "Roboto Condensed", "Segoe UI", sans-serif;
}

.container {
  width: min(92%, var(--max));
  margin: 0 auto;
}

.section {
  padding: 44px 0;
}

.title {
  font-family: "Montserrat Alternates", "Segoe UI", sans-serif;
  font-size: clamp(1.85rem, 2.8vw, 2.8rem);
  line-height: 1.2;
  margin-bottom: 18px;
}

h1.title {
  font-family: "Roboto Condensed", "Segoe UI", sans-serif;
  letter-spacing: 0.01em;
}

.subtitle {
  max-width: 760px;
  color: var(--muted);
  margin-bottom: 28px;
  font-size: larger;
  text-align: justify;
}

.header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 18, 27, 0.84);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 74px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-logo {
  width: 68px;
  height: 68px;
  object-fit: contain;
  display: block;
}

.brand-text {
  font-family: "Roboto Condensed", "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;  
  font-size: 1.5rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.menu {
  display: flex;
  align-items: center;
  gap: 18px;
}

.menu a {
  text-decoration: none;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.2s ease;
}

.menu a:hover,
.menu a.active {
  color: #fff;
}

.burger {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  color: #fff;
  border-radius: 10px;
  width: 40px;
  height: 40px;
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: clamp(520px, 82vh, 760px);
  display: grid;
}

.hero-track {
  position: relative;
  min-height: inherit;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: grid;
  align-items: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 11, 17, 0.88) 18%, rgba(8, 11, 17, 0.45) 75%);
}

.hero-slide.active {
  opacity: 1;
  pointer-events: auto;
}

.hero-slide.hero-fire {
  background-image: url("./img/hero-fire.png");
}

.hero-slide.hero-facade {
  background-image: url("./img/hero-fasad.png");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding-top: 26px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 10px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #d6deea;
  font-size: 0.82rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hero h1 {
  font-family: "Roboto Condensed", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: clamp(2rem, 5.2vw, 4rem);
  line-height: 1.08;
  margin-bottom: 16px;
}

.hero p {
  font-size: clamp(1rem, 1.7vw, 1.28rem);
  color: #d3d9e5;
  max-width: 650px;
  margin-bottom: 28px;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  border-radius: 12px;
  padding: 13px 21px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
  color: #1b1b1b;
  box-shadow: 0 10px 20px rgba(255, 107, 45, 0.28);
}

.btn-secondary {
  border: 1px solid var(--line);
  color: #f7f9fd;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: linear-gradient(160deg, rgba(34, 49, 73, 0.92), rgba(20, 29, 43, 0.92));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3,
.card h2 {
  font-family: "Montserrat Alternates", "Segoe UI", sans-serif;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  text-align: justify;
}

p.promo {
  color: var(--text);
  font-size: large;
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: stretch;
}

.list {
  list-style: none;
  display: grid;
  gap: 9px;
  margin-top: 14px;
  font-size: large;
}

.l-vid {
    display: block;
    font-size: medium;
    color: var(--muted);
    padding-bottom: 14px;
}

.list li {
  position: relative;
  padding-left: 28px;
}

.list li::before {
  content: "•";
  color: var(--accent-2);
  position: absolute;
  left: 8px;
  top: -1px;
  font-size: 1.1rem;
}

.media {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  min-height: 0;
  height: 100%;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.images {
  max-width: 450px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgb(73 76 83 / 30%);
}

.i-left {
  float: left;
  margin: 0 24px 16px 0;
}

.i-right {
  float: right;
  margin: 16px 0 0 24px;
}

.contact-wrap {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
  align-items: stretch;
}


.contact-card {
  background: linear-gradient(170deg, rgba(34, 49, 73, 0.9), rgba(20, 29, 43, 0.95));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  height: 100%;
  display: flex;
  flex-direction: column;
}


.contact-card p,
.contact-card li {
  color: var(--muted);
}

.contact-card p {
  margin-bottom: 10px;
}

.contact-card a {
  text-decoration: none;
}

.company-meta {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.messengers {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.messenger-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 0.9rem;
  text-decoration: none;
  background: rgba(10, 15, 24, 0.35);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.messenger-link:hover {
  border-color: rgba(255, 159, 67, 0.65);
  transform: translateY(-1px);
}

.messenger-icon {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffb06e;
  flex-shrink: 0;
}

.msg-svg {
  width: 14px;
  height: 14px;
  display: block;
}


.contact-form {
  background: linear-gradient(170deg, rgba(34, 49, 73, 0.9), rgba(20, 29, 43, 0.95));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  height: 100%;
  display: flex;
}


.form-grid {
  display: grid;
  gap: 12px;
  width: 100%;
  align-content: start;
}


.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(11, 17, 27, 0.7);
  color: var(--text);
  padding: 12px 13px;
  border-radius: 10px;
  font: inherit;
}

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

.file-help {
  font-size: 0.85rem;
  color: var(--muted);
}

.product-page {
  padding: 44px 0 12px;
}

.product-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  padding: 0 0 44px 0;
}

.product-layout-one {
  gap: 24px;
  padding: 0 0 44px 0;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.cert-thumb {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line);
  cursor: zoom-in;
}

.cert-modal {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 11, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 24px;
}

.cert-modal.open {
  display: flex;
}

.cert-modal img {
  width: min(92vw, 980px);
  max-height: 90vh;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--line);
}

.cert-close {
  position: absolute;
  right: 26px;
  top: 18px;
  border: 1px solid var(--line);
  background: rgba(22, 31, 45, 0.9);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
}

.fire-table {
  width: 100%;
  max-width: 600px;
  border-collapse: collapse;
  font-size: 16px;
  margin: 22px 0;
}

.fire-table th,
.fire-table td {
  text-align: left;
  padding: 14px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.fire-table th {
  font-weight: 600;
}

.fire-table td:first-child {
  width: 140px;
  font-weight: 500;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  color: #a7b4ca;
}

.footer-row {
  display: grid;
  gap: 6px;
}

#topBtn {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
  color: #191919;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 20px rgba(255, 107, 45, 0.3);
  display: none;
}

.contact-logo-wrap {
  margin-top: 8px;
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
}

.contact-logo {
  width: 300px;
  height: 200px;
  max-width: 100%;
  object-fit: contain;
  display: block;}

.contact-logo-wrap picture {
  width: 300px;
  max-width: 100%;
  display: block;
}

.form-status {
  margin-top: 2px;
  min-height: 24px;
  font-size: 0.9rem;
  color: var(--muted);
}

.form-status.success {
  color: #79e7a5;
}

.form-status.error {
  color: #ff9a9a;
}

.form-status.progress {
  color: #ffd199;
}

.contact-form button[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
}

@media (max-width: 980px) {
  .menu {
    position: absolute;
    top: 74px;
    right: 4%;
    width: min(320px, 92vw);
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(12, 18, 27, 0.98);
    display: grid;
    gap: 12px;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: 0.2s ease;
  }

  .menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .burger {
    display: inline-grid;
    place-items: center;
  }

  .grid-3,
  .cert-grid {
    grid-template-columns: 1fr;
  }

  .split,
  .contact-wrap,
  .product-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 74vh;
  }

  .hero-slide.hero-fire {
    background-image: url("./img/hero-fire-mobile.png");
  }

  .hero-slide.hero-facade {
    background-image: url("./img/hero-fasad-mobile.png");
  }

}

@media (max-width: 760px) {
  .section {
    padding: 33px 0;
  }

  .images {
    max-width: 100%;
    margin: 0;
    float: none;
  }

}

@media (max-width: 360px) {
  .contact-logo-wrap picture {
    width: 250px;
  }

  .contact-logo {
    width: 250px;
  }

}