:root {
  --bg: #f4f7f8;
  --text: #17212b;
  --muted: #60717f;
  --border: rgba(23, 33, 43, 0.12);
  --panel: rgba(255, 255, 255, 0.82);
  --panel-solid: #ffffff;
  --blue: #1f7cff;
  --cyan: #18c7d5;
  --green: #43d39e;
  --amber: #ffbe55;
  --dark: #09131f;
  --shadow: 0 24px 64px rgba(9, 19, 31, 0.12);
  --card-shadow: 0 10px 28px rgba(9, 19, 31, 0.06);
  --radius: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(9, 19, 31, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(9, 19, 31, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 10% 0%, rgba(24, 199, 213, 0.16), transparent 30%),
    radial-gradient(circle at 88% 14%, rgba(31, 124, 255, 0.12), transparent 28%),
    var(--bg);
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
  color: var(--text);
}

a {
  color: inherit;
}

p {
  color: var(--muted);
  line-height: 1.72;
}

h1,
h2,
h3 {
  margin-top: 0;
  letter-spacing: 0;
  line-height: 1.18;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-weight: 800;
}

.brand-logo {
  display: block;
  width: 150px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  font-size: 14px;
  color: var(--muted);
}

.site-nav a {
  text-decoration: none;
  font-weight: 700;
}

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

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: clamp(32px, 6vw, 88px);
  padding: clamp(64px, 8vw, 112px) clamp(20px, 6vw, 88px) clamp(56px, 7vw, 88px);
}

.hero-copy {
  max-width: 850px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: 18px;
  font-size: clamp(42px, 6vw, 76px);
}

.property-note {
  display: inline-flex;
  max-width: 100%;
  margin: 0 0 20px;
  padding: 8px 14px;
  border: 1px solid rgba(31, 124, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #32536f;
  font-size: clamp(13px, 1.6vw, 15px);
  font-weight: 700;
}

.hero-text {
  max-width: 720px;
  margin-bottom: 30px;
  font-size: clamp(18px, 2.1vw, 22px);
}

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

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 900;
  text-decoration: none;
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.primary-action {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 16px 34px rgba(31, 124, 255, 0.24);
}

.primary-action:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 20px 40px rgba(31, 124, 255, 0.32);
}

.secondary-action {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
}

.secondary-action:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
  color: var(--blue);
  background: #ffffff;
}

.hero-visual {
  position: relative;
  min-height: 480px;
  border: 1px solid var(--border);
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(24, 199, 213, 0.18), transparent 28%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(210, 229, 240, 0.74));
  box-shadow: var(--shadow);
}

.scan-frame {
  position: absolute;
  inset: 42px;
  border-radius: 22px;
  border: 1px solid rgba(31, 124, 255, 0.14);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(232, 243, 249, 0.62));
}

.sensor-head {
  position: absolute;
  top: 48px;
  left: 50%;
  width: 160px;
  height: 78px;
  transform: translateX(-50%);
  border-radius: 18px;
  background: linear-gradient(135deg, #142337, #254568);
  box-shadow: 0 24px 50px rgba(9, 19, 31, 0.22);
}

.sensor-head::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -18px;
  width: 42px;
  height: 36px;
  transform: translateX(-50%);
  border-radius: 0 0 14px 14px;
  background: #1f7cff;
}

.scan-beam {
  position: absolute;
  top: 146px;
  left: 50%;
  width: 120px;
  height: 200px;
  transform: translateX(-50%);
  clip-path: polygon(46% 0, 54% 0, 100% 100%, 0 100%);
  background: linear-gradient(180deg, rgba(24, 199, 213, 0.44), rgba(31, 124, 255, 0.04));
}

.coating-stack {
  position: absolute;
  left: 50%;
  bottom: 72px;
  width: min(78%, 340px);
  height: 104px;
  display: grid;
  grid-template-rows: 0.9fr 1.1fr 0.8fr;
  transform: translateX(-50%);
  overflow: hidden;
  border: 1px solid rgba(9, 19, 31, 0.16);
  border-radius: 16px;
  background: #fff;
}

.coating-stack span:nth-child(1) {
  background: linear-gradient(90deg, #e7eef5, #bfd0dc);
}

.coating-stack span:nth-child(2) {
  background: linear-gradient(90deg, #7bc7d9, #d6f4f2);
}

.coating-stack span:nth-child(3) {
  background: linear-gradient(90deg, #24384d, #60778c);
}

.floating-readout {
  position: absolute;
  right: 28px;
  bottom: 30px;
  width: min(260px, calc(100% - 56px));
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: 18px;
  background: rgba(9, 19, 31, 0.84);
  color: #fff;
  box-shadow: 0 20px 42px rgba(9, 19, 31, 0.28);
}

.floating-readout span {
  display: block;
  margin-bottom: 6px;
  color: #9addeb;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.section {
  padding: clamp(64px, 8vw, 106px) clamp(20px, 6vw, 88px);
}

.section-heading {
  max-width: 850px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4vw, 48px);
}

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

.solution-grid article {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--card-shadow);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.solution-grid article:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 16px 36px rgba(31, 124, 255, 0.12);
}

.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--card-shadow);
}

.solution-grid article {
  min-height: 230px;
  padding: 26px;
}

.solution-grid span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.solution-grid h3 {
  margin: 18px 0 12px;
  font-size: 24px;
}

.application-gallery {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.application-card {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-solid);
  box-shadow: var(--card-shadow);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.application-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 16px 36px rgba(31, 124, 255, 0.12);
}

.application-image {
  min-height: 210px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.38)),
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.72), transparent 20%),
    linear-gradient(135deg, #24384d, #82d3df);
}

.ceramic .application-image {
  background:
    radial-gradient(circle at 22% 26%, rgba(255,255,255,0.8), transparent 18%),
    repeating-linear-gradient(110deg, #e8edf1 0 16px, #c9d2d9 16px 32px);
}

.automotive .application-image {
  background:
    radial-gradient(circle at 72% 24%, rgba(255,255,255,0.55), transparent 18%),
    linear-gradient(135deg, #16263a, #1f7cff 48%, #89d9e1);
}

.battery .application-image {
  background:
    linear-gradient(90deg, rgba(255,255,255,0.22) 1px, transparent 1px),
    linear-gradient(135deg, #1f2937, #5fd1be);
  background-size: 24px 100%, auto;
}

.aerospace .application-image {
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.16) 0 12px, transparent 12px 24px),
    linear-gradient(135deg, #27364a, #b9c6d0);
}

.materials .application-image {
  background:
    radial-gradient(circle at 30% 40%, #ffde8a, transparent 13%),
    radial-gradient(circle at 70% 32%, #5be5d0, transparent 14%),
    radial-gradient(circle at 54% 72%, #82aaff, transparent 14%),
    linear-gradient(135deg, #132438, #536b82);
}

.application-card h3 {
  display: flex;
  min-height: 70px;
  align-items: center;
  margin: 0;
  padding: 18px;
  font-size: 18px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.58fr);
  gap: 28px;
  align-items: start;
}

.contact-copy h2 {
  max-width: 740px;
  font-size: clamp(32px, 4.2vw, 54px);
}

.contact-card {
  padding: 28px;
}

.contact-card dl {
  margin: 0 0 24px;
}

.contact-card div {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.contact-card dt {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.contact-card dd {
  margin: 0;
  font-size: 18px;
  font-weight: 900;
}

.site-footer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 36px clamp(20px, 6vw, 88px);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.footer-info {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-info strong {
  color: var(--text);
}

.footer-copyright {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid rgba(23, 33, 43, 0.08);
  padding-top: 16px;
  font-size: 12px;
}

@media (max-width: 1040px) {
  .hero,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 420px;
  }

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

@media (max-width: 760px) {
  .site-header {
    height: auto;
    min-height: 68px;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 14px 18px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    white-space: nowrap;
  }

  .hero {
    padding-top: 46px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .brand-logo {
    width: 132px;
  }

  .solution-grid,
  .application-gallery {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 360px;
  }

  .scan-frame {
    inset: 24px;
  }

}