:root {
  --navy: #08192d;
  --blue: #194a78;
  --ink: #15202b;
  --muted: #66717b;
  --line: #d9dedf;
  --paper: #f7f8f6;
  --white: #ffffff;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 20;
  padding: 10px 14px; color: var(--white); background: var(--navy);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }
.site-header { position: absolute; inset: 0 0 auto; z-index: 10; }
.header-inner {
  display: flex; align-items: center; justify-content: space-between; min-height: 96px;
}
.brand { display: block; width: 132px; }
.brand img { width: 100%; height: auto; }
nav { display: flex; align-items: center; gap: 30px; }
nav a {
  color: var(--navy); font-size: 14px; font-weight: 650; text-decoration: none;
}
nav a:hover, nav a:focus-visible {
  color: var(--blue); text-decoration: underline; text-underline-offset: 5px;
}
.hero {
  display: flex; align-items: center; min-height: 820px;
  padding: 176px 0 96px; border-bottom: 1px solid var(--line);
  background-color: var(--paper);
  background-image: url("assets/hero-background.jpg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
.hero-grid {
  display: block;
}
.hero-copy { max-width: 760px; }
.eyebrow, .section-label, .principle-number {
  margin: 0; color: var(--blue); font-size: 12px; font-weight: 750;
  letter-spacing: .13em; line-height: 1.4; text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 760px; margin: 28px 0 36px; color: var(--navy);
  font-size: clamp(52px, 7vw, 92px); font-weight: 760;
  letter-spacing: -.055em; line-height: 1.08;
}
h1 span { color: var(--blue); }
.hero-description {
  max-width: 610px; margin-bottom: 0; color: #46535e;
  font-size: clamp(18px, 2vw, 22px); line-height: 1.75;
}
.section { padding: 136px 0; border-bottom: 1px solid var(--line); }
.intro-grid, .contact-inner {
  display: grid; grid-template-columns: 1fr 3fr; gap: 48px;
}
.intro-copy { max-width: 790px; }
.intro-copy h2, .contact h2 {
  margin: 0 0 34px; color: var(--navy);
  font-size: clamp(34px, 4.4vw, 58px); font-weight: 720;
  letter-spacing: -.045em; line-height: 1.2;
}
.intro-copy p {
  max-width: 750px; margin-bottom: 0; color: #45515b;
  font-size: clamp(18px, 2.2vw, 24px); line-height: 1.75;
}
.principles {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 112px;
}
.principles article { padding-top: 22px; border-top: 2px solid var(--navy); }
.principles h3 {
  margin: 42px 0 12px; color: var(--navy); font-size: 22px; letter-spacing: -.025em;
}
.principles article > p:last-child { margin-bottom: 0; color: var(--muted); }
.contact {
  padding: 132px 0 142px; color: var(--white); background: var(--navy);
}
.contact .section-label { color: #86a6c4; }
.contact h2 { margin-bottom: 48px; color: var(--white); }
.contact a {
  display: inline-block; color: var(--white); font-size: clamp(21px, 2.4vw, 30px);
  font-weight: 650; text-decoration-color: #547ba0; text-underline-offset: 8px;
}
.contact a:hover, .contact a:focus-visible { text-decoration-color: var(--white); }
footer {
  padding: 30px 0; color: #bec9d2; background: var(--navy);
  border-top: 1px solid #24384d;
}
.footer-inner p { margin: 0; font-size: 13px; }

@media (max-width: 800px) {
  .container { width: min(calc(100% - 40px), var(--container)); }
  .header-inner { min-height: 78px; }
  .brand { width: 108px; }
  nav { gap: 18px; }
  nav a:not(:last-child) { display: none; }
  .hero {
    min-height: auto; padding: 148px 0 78px;
    background-position: 60% center;
  }
  h1 { margin-top: 22px; font-size: clamp(48px, 13.4vw, 70px); }
  .section { padding: 92px 0; }
  .intro-grid, .contact-inner {
    grid-template-columns: 1fr; gap: 26px;
  }
  .principles { grid-template-columns: 1fr; gap: 46px; margin-top: 74px; }
  .principles h3 { margin-top: 26px; }
  .contact { padding: 92px 0 100px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}