:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --surface: #f8fafc;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: "Inter", "Noto Sans KR", system-ui, -apple-system, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Malgun Gothic", "Nanum Gothic", "Helvetica Neue", Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { position: sticky; top: 0; background: rgba(255,255,255,0.88); backdrop-filter: saturate(180%) blur(8px); border-bottom: 1px solid var(--border); z-index: 50; box-shadow: 0 2px 8px rgba(17,24,39,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 700; font-size: 1.125rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.nav-list { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; }
.nav-list a { color: var(--text); text-decoration: none; font-weight: 500; letter-spacing: -0.01em; position: relative; padding: 8px 6px; }
.nav-list a::after { content: ""; position: absolute; left: 6px; right: 6px; bottom: 0; height: 2px; background: var(--primary); opacity: 0; transform: scaleX(0); transform-origin: left; transition: transform .18s ease, opacity .18s ease; }
.nav-list a:hover::after { opacity: 1; transform: scaleX(1); }
.nav-list a:hover { color: var(--primary); }
.nav-toggle { display: none; }

/* Active nav item (scrollspy) */
.nav-list a.active { color: var(--primary); }
.nav-list a.active::after { opacity: 1; transform: scaleX(1); }

/* Hero */
.hero { background: linear-gradient(180deg, #eef2ff 0%, #ffffff 60%); padding: 84px 0; scroll-margin-top: 72px; }
.hero-inner { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: center; }
.hero-text { max-width: 720px; }
.hero h1 { margin: 0 0 12px; font-size: 2.25rem; line-height: 1.2; letter-spacing: -0.01em; }
.hero p { margin: 0 0 20px; color: var(--muted); }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 16px; border-radius: 10px; text-decoration: none; font-weight: 600; border: 1px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #f1f5f9; color: var(--text); }
.btn-secondary:hover { background: #e2e8f0; }
.btn-outline { color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: #eff6ff; }

/* Sections */
.section { padding: 72px 0; scroll-margin-top: 72px; }
.section-alt { background: var(--surface); }
.section-title { font-size: 1.6rem; margin: 0 0 8px; font-weight: 700; letter-spacing: -0.01em; }
.section-subtitle { color: var(--muted); margin: 0 0 24px; font-size: 1rem; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 20px; display: flex; flex-direction: column; gap: 8px; box-shadow: 0 1px 3px rgba(17,24,39,0.04); }
.card-icon { font-size: 24px; }
.card h3 { margin: 0; font-size: 1.125rem; }
.card p { margin: 0; color: var(--muted); }
.card-link { margin-top: auto; color: var(--primary); text-decoration: none; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.card-link:hover { text-decoration: underline; }
.card-link::after { content: '›'; font-size: 1.1em; }

/* Stories */
.stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.story { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.story .story-tag { display: inline-block; background: #eff6ff; color: var(--primary); border: 1px solid #bfdbfe; padding: 4px 8px; border-radius: 999px; font-size: 12px; margin-bottom: 8px; }
.story h3 { margin: 6px 0; font-size: 1rem; }
.story time { color: var(--muted); font-size: 0.875rem; }

/* CTA */
.cta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cta { display: flex; align-items: center; justify-content: space-between; gap: 10px; border: 1px solid var(--border); background: #fff; border-radius: 12px; padding: 16px; text-decoration: none; color: var(--text); font-weight: 600; }
.cta span { display: block; color: var(--muted); font-weight: 400; margin-left: 8px; }
.cta:hover { border-color: #cbd5e1; }

/* News */
.news { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.news-item { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.news-label { display: inline-block; background: #f1f5f9; color: #0f172a; border: 1px solid #e2e8f0; padding: 4px 8px; border-radius: 6px; font-size: 12px; margin-bottom: 8px; }
.news-item h3 { margin: 6px 0 8px; font-size: 1rem; }
.news-item time { color: var(--muted); font-size: 0.875rem; }

/* Footer */
.site-footer { background: #0f172a; color: #e5e7eb; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; padding: 32px 0; }
.footer-brand p { color: #94a3b8; }
.footer-contact ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer-contact a { color: #e5e7eb; text-decoration: none; }
.footer-meta { border-top: 1px solid #1f2937; padding: 16px 0; display: flex; align-items: center; justify-content: space-between; }
.footer-nav a { color: #94a3b8; text-decoration: none; margin-left: 12px; }
.footer-nav a:hover { color: #e5e7eb; }

/* Base links and focus */
a { transition: color .15s ease, background-color .15s ease, border-color .15s ease; }
:focus-visible { outline: 2px solid #60a5fa; outline-offset: 2px; }

/* Skip link (visible on focus) */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 20px;
  top: 12px;
  z-index: 100;
  background: var(--primary);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(17,24,39,0.12);
}

/* Responsive */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .stories { grid-template-columns: repeat(2, 1fr); }
  .news { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; background: transparent; border: none; font-size: 22px; }
  .nav-list { display: none; position: absolute; top: 64px; right: 20px; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 10px; flex-direction: column; gap: 8px; }
  .nav-list.show { display: flex; }
  .cards { grid-template-columns: 1fr; }
  .stories { grid-template-columns: 1fr; }
  .cta-grid { grid-template-columns: 1fr; }
  .news { grid-template-columns: 1fr; }
  .hero { padding: 64px 0; }
  .hero h1 { font-size: 1.7rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}