:root {
  --ink: #17224a;
  --ink-strong: #10173a;
  --muted: #5e667f;
  --line: #dfe4ee;
  --surface: #ffffff;
  --surface-soft: #f4f7fb;
  --surface-tint: #edf6f7;
  --orange: #f38a00;
  --orange-dark: #c86a00;
  --blue: #28368c;
  --teal: #0c8a9a;
  --green: #587a2f;
  --shadow: 0 18px 60px rgba(16, 23, 58, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto auto;
  align-items: center;
  gap: 22px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(223, 228, 238, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 12px;
  font-weight: 800;
  color: var(--ink-strong);
}

.brand img {
  width: 84px;
  height: 54px;
  object-fit: contain;
}

.brand span {
  font-size: 0.95rem;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.nav a:hover,
.nav a:focus {
  color: var(--blue);
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0 18px;
  font-weight: 800;
  white-space: nowrap;
}

.header-cta,
.button.primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 10px 26px rgba(243, 138, 0, 0.22);
}

.header-cta:hover,
.button.primary:hover {
  background: var(--orange-dark);
}

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.54);
  background: rgba(255, 255, 255, 0.12);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.button.wide {
  width: 100%;
}

.hero {
  position: relative;
  min-height: min(790px, calc(100vh - 70px));
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: var(--ink-strong);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("assets/img/hero-telecom.jpg");
  background-position: center;
  background-size: cover;
  transform: scale(1.02);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(10, 16, 42, 0.92), rgba(10, 16, 42, 0.58) 48%, rgba(10, 16, 42, 0.32)),
    linear-gradient(0deg, rgba(10, 16, 42, 0.76), rgba(10, 16, 42, 0.06) 42%);
}

.hero-content {
  position: relative;
  width: min(760px, calc(100% - 36px));
  margin: 0 0 clamp(120px, 16vh, 180px) clamp(18px, 6vw, 84px);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3.3rem, 9vw, 8.6rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-copy {
  width: min(650px, 100%);
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(1.08rem, 2.2vw, 1.42rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero-proof {
  position: absolute;
  left: clamp(18px, 6vw, 84px);
  right: clamp(18px, 6vw, 84px);
  bottom: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 16, 42, 0.42);
  backdrop-filter: blur(14px);
}

.hero-proof div {
  min-width: 0;
  padding: 20px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-proof div:last-child {
  border-right: 0;
}

.hero-proof strong,
.hero-proof span {
  display: block;
}

.hero-proof strong {
  font-size: 1rem;
}

.hero-proof span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

.brand-strip {
  display: grid;
  grid-template-columns: repeat(10, minmax(84px, 1fr));
  gap: 1px;
  overflow: auto;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.brand-strip span {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 12px;
  background: #fff;
  color: var(--ink);
  font-weight: 900;
  text-align: center;
}

.section {
  padding: clamp(70px, 9vw, 118px) clamp(18px, 5vw, 72px);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(280px, 1.08fr);
  gap: clamp(30px, 6vw, 86px);
  align-items: start;
}

h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(2rem, 4.8vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 1.05rem;
  line-height: 1.2;
}

p {
  color: var(--muted);
}

.intro-copy {
  display: grid;
  gap: 16px;
  padding-top: 8px;
}

.intro-copy p {
  margin: 0;
  font-size: 1.05rem;
}

.feature-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}

.feature-band article {
  min-height: 242px;
  padding: clamp(28px, 4vw, 48px);
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #f7f9fc);
}

.feature-band article:last-child {
  border-right: 0;
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 22px;
  border-radius: 8px;
  background: var(--surface-tint);
  color: var(--teal);
  font-weight: 900;
}

.feature-band p,
.quality-grid p,
.product-card p {
  margin: 10px 0 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(280px, 1.05fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 34px;
}

.catalog {
  background:
    linear-gradient(180deg, #fff 0, #fff 34%, var(--surface-soft) 34%, var(--surface-soft) 100%);
}

.catalog-tools {
  display: grid;
  gap: 14px;
  justify-items: end;
}

.search-box {
  width: min(520px, 100%);
  display: grid;
  gap: 8px;
}

.search-box span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.search-box input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 15px;
  color: var(--ink);
  font: inherit;
  background: #fff;
  box-shadow: 0 12px 30px rgba(23, 34, 74, 0.06);
}

.search-box input:focus {
  outline: 3px solid rgba(12, 138, 154, 0.18);
  border-color: var(--teal);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.filter {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 13px;
  color: var(--muted);
  background: #fff;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
}

.filter.active,
.filter:hover {
  border-color: var(--blue);
  color: #fff;
  background: var(--blue);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.product-card {
  min-height: 214px;
  display: grid;
  align-content: start;
  border: 1px solid rgba(223, 228, 238, 0.9);
  border-radius: 8px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 28px rgba(23, 34, 74, 0.06);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: rgba(40, 54, 140, 0.32);
  box-shadow: var(--shadow);
}

.product-card span {
  margin-bottom: 12px;
  color: var(--orange-dark);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.empty-state {
  margin: 28px 0 0;
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  text-align: center;
  background: #fff;
}

.visual-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(280px, 1.05fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
  padding: clamp(76px, 9vw, 120px) clamp(18px, 5vw, 72px);
  color: #fff;
  background:
    linear-gradient(90deg, rgba(16, 23, 58, 0.97), rgba(16, 23, 58, 0.84)),
    url("assets/img/solar-field.jpg") center/cover;
}

.visual-section h2,
.visual-section h3 {
  color: #fff;
}

.visual-section p,
.visual-section li {
  color: rgba(255, 255, 255, 0.76);
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

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

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 14px;
  height: 2px;
  background: var(--orange);
}

.image-stack {
  position: relative;
  min-height: 420px;
}

.image-main,
.image-side {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  object-fit: cover;
}

.image-main {
  right: 0;
  top: 0;
  width: min(78%, 620px);
  height: 300px;
}

.image-side {
  left: 0;
  bottom: 0;
  width: min(48%, 320px);
  height: 290px;
}

.quality {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(280px, 1.18fr);
  gap: clamp(30px, 6vw, 86px);
  background: #fff;
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.quality-grid article {
  min-height: 166px;
  border-left: 3px solid var(--teal);
  padding: 22px;
  background: var(--surface-soft);
}

.contact {
  padding: clamp(70px, 8vw, 104px) clamp(18px, 5vw, 72px);
  background: linear-gradient(135deg, var(--blue), #151d52 54%, #0b6f7f);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 420px);
  gap: 34px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  color: #fff;
}

.contact h2 {
  color: #fff;
}

.contact p {
  color: rgba(255, 255, 255, 0.75);
}

.contact-panel {
  display: grid;
  gap: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.contact-panel strong {
  color: #fff;
  font-size: 1.18rem;
}

.contact-label {
  margin: 0;
  font-size: 0.84rem;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 32px clamp(18px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer div {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer img {
  width: 76px;
}

.footer p {
  margin: 0;
  font-size: 0.92rem;
}

.footer a {
  color: var(--blue);
  font-weight: 900;
}

@media (max-width: 1120px) {
  .product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    order: 3;
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
    padding-top: 2px;
  }

  .header-cta {
    padding: 0 14px;
  }

  .hero {
    min-height: 780px;
  }

  .hero-content {
    margin-bottom: 250px;
  }

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

  .hero-proof div {
    padding: 14px 16px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  }

  .hero-proof div:last-child {
    border-bottom: 0;
  }

  .brand-strip {
    grid-template-columns: repeat(10, 120px);
  }

  .intro-grid,
  .section-heading,
  .visual-section,
  .quality,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .catalog-tools {
    justify-items: stretch;
  }

  .filter-row {
    justify-content: flex-start;
  }

  .feature-band {
    grid-template-columns: 1fr;
  }

  .feature-band article {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .feature-band article:last-child {
    border-bottom: 0;
  }

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

  .image-stack {
    min-height: 470px;
  }

  .image-main {
    width: 84%;
  }

  .image-side {
    width: 58%;
  }
}

@media (max-width: 620px) {
  .site-header {
    gap: 12px;
    padding: 12px 14px;
  }

  .brand img {
    width: 68px;
    height: 44px;
  }

  .brand span {
    font-size: 0.8rem;
  }

  .header-cta {
    min-height: 38px;
    font-size: 0.82rem;
  }

  .nav {
    gap: 16px;
    font-size: 0.86rem;
  }

  .hero {
    min-height: 720px;
  }

  .hero-content {
    width: calc(100% - 28px);
    margin: 0 14px 248px;
  }

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

  .button {
    min-height: 46px;
  }

  .hero-proof {
    left: 14px;
    right: 14px;
    bottom: 14px;
  }

  .section,
  .visual-section,
  .contact {
    padding-left: 14px;
    padding-right: 14px;
  }

  .product-grid,
  .quality-grid {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 0;
  }

  .filter {
    flex: 1 1 128px;
  }

  .image-stack {
    min-height: 360px;
  }

  .image-main {
    width: 100%;
    height: 210px;
  }

  .image-side {
    width: 58%;
    height: 180px;
  }

  .footer,
  .footer div {
    align-items: flex-start;
    flex-direction: column;
  }
}