:root {
  --ink: #182026;
  --muted: #64717a;
  --line: #d9dedf;
  --paper: #ffffff;
  --wash: #f3f5f4;
  --deep: #152026;
  --blue: #1f5f8b;
  --blue-dark: #164569;
  --accent: #b8742b;
  --radius: 6px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #e8ebec;
  line-height: 1.75;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(18px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--blue);
  color: #fff;
  font-size: 22px;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 22px;
  font-size: 14px;
  font-weight: 800;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: clamp(32px, 7vw, 90px);
  align-items: center;
  min-height: 690px;
  padding: 96px clamp(18px, 6vw, 76px);
  background:
    linear-gradient(90deg, rgba(21, 32, 38, 0.93), rgba(21, 32, 38, 0.74)),
    repeating-linear-gradient(135deg, rgba(255,255,255,0.08) 0 1px, transparent 1px 18px),
    var(--deep);
  color: #f6fbfc;
}

.eyebrow {
  margin: 0 0 14px;
  color: #d59648;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.split h2,
.contact-section h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.16;
}

.hero h1 {
  max-width: 780px;
  font-size: clamp(42px, 7vw, 78px);
}

.hero-copy p:not(.eyebrow) {
  max-width: 760px;
  margin: 26px 0 0;
  color: #dbe5e8;
  font-size: clamp(17px, 2vw, 21px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 900;
  cursor: pointer;
}

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

.button.secondary {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.hero-panel {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.hero-panel div {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

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

.hero-panel dt {
  color: #d59648;
  font-size: 12px;
  font-weight: 900;
}

.hero-panel dd {
  margin: 4px 0 0;
  color: #fff;
  font-weight: 800;
}

.section,
.contact-section {
  padding: 82px clamp(18px, 6vw, 76px);
  background: var(--paper);
}

.section.muted,
.quality {
  background: var(--wash);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(200px, 0.34fr) minmax(0, 1fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 32px;
}

.section-heading h2,
.split h2,
.contact-section h2 {
  font-size: clamp(30px, 4vw, 52px);
}

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

.strength-grid article,
.case-grid article {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.strength-grid span {
  color: var(--blue);
  font-weight: 900;
}

.strength-grid h3,
.case-grid h3 {
  margin: 14px 0 8px;
  font-size: 22px;
  line-height: 1.35;
}

.strength-grid p,
.case-grid p,
.split p,
.quality-list p,
.contact-section p {
  margin: 0;
  color: var(--muted);
}

.case-visual {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  background: var(--line);
}

.case-visual.aluminum {
  background: linear-gradient(135deg, #d6dde0, #8f9da4);
}

.case-visual.steel {
  background: linear-gradient(135deg, #f1f1ee, #9ea8a6);
}

.case-visual.resin {
  background: linear-gradient(135deg, #f0e4d0, #bf9b68);
}

.split,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1fr);
  gap: clamp(30px, 7vw, 84px);
  align-items: start;
}

table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  background: var(--blue);
  color: #fff;
}

.quality-list {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(280px, 1fr);
  gap: 32px;
}

.quality-list ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-weight: 800;
}

.quality-list li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8faf9;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid #cbd3d6;
  border-radius: var(--radius);
  font: inherit;
}

.contact-form input {
  min-height: 46px;
  padding: 0 12px;
}

.contact-form textarea {
  padding: 12px;
  resize: vertical;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .quality-list,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .strength-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .section-heading {
    grid-template-columns: 1fr;
  }
}