:root {
  color-scheme: light dark;
  --bg: #101518;
  --panel: #182024;
  --panel-strong: #11191d;
  --text: #f5efe2;
  --muted: #c5b79d;
  --line: #6b5b3c;
  --line-soft: rgba(116, 216, 229, 0.22);
  --accent: #74d8e5;
  --accent-strong: #a4f2ff;
  --warning: #e7b86a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
  background:
    linear-gradient(180deg, rgba(16, 21, 24, 0.88), rgba(16, 21, 24, 1)),
    radial-gradient(circle at 76% 18%, rgba(116, 216, 229, 0.16), transparent 32%),
    var(--bg);
  color: var(--text);
  padding: clamp(18px, 4vw, 48px);
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:focus-visible,
a:hover {
  text-decoration: underline;
}

.shell {
  width: min(100%, 920px);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.document {
  width: min(100%, 980px);
}

.hero,
.panel,
.footer {
  border: 1px solid rgba(107, 91, 60, 0.86);
  background: linear-gradient(180deg, rgba(24, 32, 36, 0.96), rgba(17, 25, 29, 0.98));
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
}

.hero {
  padding: clamp(24px, 5vw, 44px);
}

.hero.compact {
  padding-bottom: clamp(20px, 4vw, 32px);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2.1rem, 7vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.32rem, 3.4vw, 2rem);
  line-height: 1.14;
}

h3 {
  margin: 22px 0 8px;
  color: var(--warning);
  font-size: 1.06rem;
  line-height: 1.25;
}

p,
li,
dd {
  color: var(--muted);
  line-height: 1.68;
}

p:last-child,
ul:last-child,
dl:last-child {
  margin-bottom: 0;
}

ul {
  padding-left: 1.2rem;
}

.lead {
  max-width: 68ch;
  font-size: clamp(1rem, 2.4vw, 1.18rem);
}

.panel {
  padding: clamp(20px, 4vw, 34px);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--line-soft);
  background: rgba(116, 216, 229, 0.10);
  color: var(--text);
  font-weight: 800;
}

.button.secondary {
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.04);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 4px 2px;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: minmax(120px, 0.28fr) 1fr;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(107, 91, 60, 0.5);
  background: rgba(255, 255, 255, 0.035);
}

dt {
  color: var(--text);
  font-weight: 800;
}

dd {
  margin: 0;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
  padding: 18px 22px;
}

.footer p {
  margin: 0;
}

@media (max-width: 560px) {
  body {
    padding: 14px;
  }

  .contact-list div {
    grid-template-columns: 1fr;
  }
}