:root {
  color-scheme: dark;
  --bg: #080b0f;
  --bg-2: #101820;
  --panel: rgba(255, 255, 255, 0.07);
  --panel-strong: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.16);
  --text: #f4f8fb;
  --muted: #aebbc6;
  --cyan: #46d8ff;
  --green: #7df0b2;
  --warm: #ffc45c;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Noto Sans KR", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(8, 11, 15, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background:
    linear-gradient(135deg, transparent 42%, var(--green) 44% 56%, transparent 58%),
    radial-gradient(circle at 65% 35%, var(--warm) 0 12%, transparent 13%);
  box-shadow: 0 0 24px rgba(70, 216, 255, 0.38);
}

.nav-links {
  display: flex;
  gap: clamp(14px, 3vw, 34px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-links a {
  transition: color 180ms ease;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  position: relative;
  display: grid;
  min-height: 92vh;
  overflow: hidden;
  align-items: center;
  padding: 118px clamp(20px, 6vw, 86px) 96px;
}

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

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(8, 11, 15, 0.92) 0%, rgba(8, 11, 15, 0.67) 42%, rgba(8, 11, 15, 0.18) 100%),
    linear-gradient(180deg, rgba(8, 11, 15, 0.05) 0%, rgba(8, 11, 15, 0.78) 100%);
}

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

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(74px, 14vw, 172px);
  line-height: 0.86;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  margin: 28px 0 0;
  color: #d8e3ea;
  font-size: clamp(18px, 2.3vw, 25px);
  font-weight: 500;
}

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

.primary-action,
.secondary-action,
.contact-form button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 0 22px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.primary-action,
.contact-form button {
  background: linear-gradient(135deg, var(--cyan), var(--green));
  color: #061016;
}

.secondary-action {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
}

.primary-action:hover,
.secondary-action:hover,
.contact-form button:hover {
  transform: translateY(-2px);
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
  background: var(--bg-2);
}

.metric {
  min-height: 128px;
  padding: 28px clamp(20px, 4vw, 56px);
  border-right: 1px solid var(--line);
}

.metric:last-child {
  border-right: 0;
}

.metric strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-weight: 600;
}

.section,
.vision-section,
.contact-section {
  padding: 100px clamp(20px, 6vw, 86px);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 40px;
}

h2 {
  margin: 0;
  font-size: clamp(32px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.business-card {
  min-height: 310px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.card-index {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.business-card h3 {
  margin: 58px 0 14px;
  font-size: 26px;
  line-height: 1.15;
}

.business-card p,
.vision-copy p,
.vision-panel p,
.contact-copy p,
.form-note {
  color: var(--muted);
}

.vision-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  background:
    linear-gradient(135deg, rgba(70, 216, 255, 0.12), transparent 38%),
    #0b1117;
}

.vision-copy p {
  max-width: 620px;
  font-size: 18px;
}

.vision-panel {
  display: grid;
  gap: 12px;
}

.vision-panel div {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.vision-panel span {
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
}

.vision-panel strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 520px);
  gap: clamp(28px, 6vw, 86px);
  background: #f3f8fb;
  color: #071015;
}

.contact-copy p {
  color: #4b5a64;
  font-size: 18px;
}

.email-link {
  display: inline-flex;
  margin-top: 10px;
  color: #007c9f;
  font-weight: 800;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  border: 1px solid rgba(7, 16, 21, 0.12);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 22px 70px rgba(8, 20, 28, 0.12);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: #22313a;
  font-size: 14px;
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(7, 16, 21, 0.16);
  border-radius: 6px;
  padding: 13px 14px;
  color: #071015;
  font: inherit;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: #009fd0;
  outline: 3px solid rgba(0, 159, 208, 0.16);
}

.contact-form button {
  width: 100%;
  border: 0;
  font: inherit;
}

.form-note {
  min-height: 24px;
  margin: 0;
  font-size: 14px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  padding: 28px clamp(20px, 6vw, 86px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #07090d;
  font-size: 14px;
}

.site-footer span:first-child {
  color: var(--text);
  font-weight: 800;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  .hero {
    min-height: 88vh;
    padding-top: 150px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(8, 11, 15, 0.94), rgba(8, 11, 15, 0.54)),
      linear-gradient(180deg, rgba(8, 11, 15, 0.08), rgba(8, 11, 15, 0.84));
  }

  .intro-band,
  .business-grid,
  .vision-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .metric {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric:last-child {
    border-bottom: 0;
  }

  .business-card {
    min-height: 240px;
  }

  .business-card h3 {
    margin-top: 34px;
  }
}

@media (max-width: 560px) {
  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .hero-actions a {
    width: 100%;
  }

  .section,
  .vision-section,
  .contact-section {
    padding-block: 72px;
  }
}