:root {
  --primary: #3D5A80;
  --primary-dark: #2C4460;
  --accent: #EE6C4D;
  --text: #1E2A38;
  --text-soft: #445266;
  --bg: #F7F9FB;
  --card-bg: #FFFFFF;
  --border: #D9E2EC;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  font-family: "IBM Plex Sans KR", "Noto Sans KR", sans-serif;
  font-display: swap;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
}

a { color: var(--primary); }
a:hover, a:focus { color: var(--accent); }

.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header nav: left fixed sidebar on wide screens */
.site-nav {
  background: var(--primary);
  color: #fff;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-nav .brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.site-nav nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.site-nav nav a {
  color: #fff;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 6px;
  min-height: 44px;
  display: flex;
  align-items: center;
  font-size: 0.95rem;
}

.site-nav nav a:hover, .site-nav nav a:focus {
  background: rgba(255,255,255,0.16);
  color: #fff;
}

main {
  flex: 1;
  width: 100%;
}

article {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

section {
  margin-top: 40px;
}

h1, h2 {
  color: var(--primary-dark);
  line-height: 1.35;
}

h1 { font-size: 1.9rem; margin: 0 0 12px; }
h2 { font-size: 1.35rem; margin: 0 0 14px; }

.hero {
  background: var(--primary);
  color: #fff;
  margin: 0 0 8px;
  padding: 32px 20px;
  border-radius: 0 0 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero h1 { color: #fff; }
.hero .lead { font-size: 1.05rem; color: #E6EDF5; max-width: 60ch; }

.hero picture, .hero img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.intro p, .region p, .caution p, .cta-links p {
  color: var(--text-soft);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-top: 16px;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 480px;
  background: var(--card-bg);
}

caption {
  text-align: left;
  padding: 12px 14px 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

th {
  background: #EDF2F7;
  color: var(--primary-dark);
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.check-list li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 14px 16px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery-grid figure {
  margin: 0;
}

.gallery-grid picture, .gallery-grid img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

.cta-links a, .caution a {
  font-weight: 600;
}

.cta {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 12px 28px;
  margin-top: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
}

.cta-button:hover, .cta-button:focus {
  background: #D95A3A;
  color: #fff;
}

footer {
  background: var(--primary-dark);
  color: #EAF0F6;
  padding: 32px 20px;
  margin-top: 48px;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  max-width: 880px;
  margin: 0 auto 20px;
}

footer nav a {
  color: #EAF0F6;
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  font-size: 0.9rem;
}

footer nav a:hover, footer nav a:focus {
  color: var(--accent);
}

footer address {
  max-width: 880px;
  margin: 0 auto;
  font-style: normal;
  font-size: 0.9rem;
  color: #C7D2DE;
  line-height: 1.8;
}

footer address a {
  color: #EAF0F6;
}

footer p {
  max-width: 880px;
  margin: 16px auto 0;
  font-size: 0.8rem;
  color: #9FAEC0;
}

/* Breakpoints */
@media (min-width: 768px) {
  .hero { flex-direction: row-reverse; align-items: center; padding: 40px 32px; }
  .hero-text { flex: 1; }
  .hero picture { flex: 1; }
}

@media (min-width: 1024px) {
  .layout { flex-direction: row; }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    width: 220px;
    min-height: 100vh;
    position: sticky;
    top: 0;
    align-self: flex-start;
    padding: 24px 16px;
  }

  .site-nav nav {
    flex-direction: column;
    width: 100%;
  }

  .site-nav nav a { width: 100%; }

  main { flex: 1; }

  article { padding: 0 32px 60px; margin: 0; max-width: 900px; }

  .hero { border-radius: 16px; margin-top: 24px; }
}

@media (min-width: 1280px) {
  article { max-width: 960px; margin: 0 auto; }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.5rem; }
  article { padding: 0 14px 32px; }
}

.related-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.related-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--line, #ddd);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--paper, #fff);
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.related-card:hover,
.related-card:focus-visible {
  border-color: currentColor;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.related-card-arrow { opacity: 0.6; flex-shrink: 0; }
@media (max-width: 480px) {
  .related-cards { grid-template-columns: 1fr; }
}