:root {
  --bg-color: #f3f4f6;
  --surface-color: #ffffff;
  --surface-soft: #eef0f4;
  --primary-gold: #1f2937;
  --secondary-red: #8b3a3a;
  --text-main: #111827;
  --text-muted: #4b5563;
  --border-color: #e5e7eb;
  --nav-bg: rgba(243, 244, 246, 0.86);
  --gold-soft: rgba(31, 41, 55, 0.08);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.06);
  --font-sans: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  --font-serif: "Noto Serif KR", "Hahmlet", Georgia, "Batang", serif;
}

html[data-theme="dark"] {
  --bg-color: #11111f;
  --surface-color: #1a1a2e;
  --surface-soft: #151524;
  --primary-gold: #c9a84c;
  --secondary-red: #8b3a3a;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --border-color: #2e2b3f;
  --nav-bg: rgba(11, 11, 20, 0.86);
  --gold-soft: rgba(201, 168, 76, 0.1);
  --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --card-shadow-hover: 0 24px 32px -12px rgba(0, 0, 0, 0.58);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.35s ease, color 0.35s ease;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary-gold); }

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary-gold);
  outline-offset: 3px;
}

.serif { font-family: var(--font-serif); }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.nav-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  min-width: 40px;
  height: 40px;
  padding: 4px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  color: var(--primary-gold);
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.theme-toggle:hover {
  border-color: var(--primary-gold);
}

.theme-toggle-icon {
  font-size: 1.05rem;
  line-height: 1;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 20px;
  border: 1px solid var(--primary-gold);
  border-radius: 8px;
  color: var(--primary-gold);
  background: transparent;
  font-family: inherit;
  line-height: 1.2;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn.primary {
  background: var(--primary-gold);
  color: var(--bg-color);
  font-weight: 700;
}

.btn:hover {
  background: var(--gold-soft);
  color: var(--primary-gold);
}

.btn.primary:hover {
  background: var(--text-main);
  color: var(--bg-color);
}

.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "八字";
  position: absolute;
  right: -4vw;
  top: 48px;
  color: rgba(255, 255, 255, 0.025);
  font-family: var(--font-serif);
  font-size: clamp(9rem, 26vw, 22rem);
  line-height: 1;
  pointer-events: none;
}

html[data-theme="light"] .hero::before {
  color: rgba(45, 45, 45, 0.045);
}

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

.eyebrow {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  color: var(--primary-gold);
  font-size: 0.86rem;
  margin-bottom: 16px;
  box-shadow: var(--card-shadow);
}

h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: 1.35;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3.7rem);
  margin-bottom: 22px;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  margin-bottom: 18px;
}

h3 { font-size: 1.2rem; margin-bottom: 8px; }

p { color: var(--text-muted); }

.lead {
  font-size: 1.08rem;
  max-width: 700px;
  margin-bottom: 28px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.section {
  padding: 72px 0;
  border-top: 1px solid var(--border-color);
}

.section-intro {
  max-width: 760px;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  min-height: 100%;
  padding: 32px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-gold);
  box-shadow: var(--card-shadow-hover);
}

.card.clickable-card {
  cursor: pointer;
}

.card p { font-size: 0.96rem; }
.card .link {
  display: inline-block;
  margin-top: 16px;
  color: var(--primary-gold);
  font-weight: 700;
}

.card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  color: var(--primary-gold);
}

.article {
  padding: 64px 0;
}

.article-header {
  max-width: 820px;
  margin-bottom: 42px;
}

.article-body {
  max-width: 820px;
}

.article-body h2 {
  margin-top: 42px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin-top: 28px;
}

.article-body p,
.article-body li {
  color: var(--text-muted);
}

.article-body ul,
.article-body ol {
  margin: 12px 0 24px 22px;
}

.note {
  margin: 24px 0;
  padding: 18px 20px;
  border: 1px solid rgba(201, 168, 76, 0.45);
  border-radius: 8px;
  background: var(--gold-soft);
  color: var(--text-main);
}

.form-panel {
  max-width: 760px;
  padding: 28px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  box-shadow: var(--card-shadow);
  transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

label, .label {
  color: var(--text-main);
  font-weight: 700;
}

input, select, textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-color);
  color: var(--text-main);
  padding: 10px 12px;
  font: inherit;
  transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease;
}

textarea { min-height: 140px; resize: vertical; }

.helper { font-size: 0.9rem; color: var(--text-muted); }

.related {
  margin-top: 52px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.related-links a {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--text-muted);
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-color);
  padding: 18px 20px;
  box-shadow: var(--card-shadow);
  transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

summary {
  cursor: pointer;
  color: var(--text-main);
  font-weight: 700;
}

details p { margin-top: 12px; }

.footer {
  padding: 42px 0;
  border-top: 1px solid var(--border-color);
  background: var(--surface-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 840px) {
  .nav-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 24px;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .theme-toggle {
    order: 3;
  }

  .hero { padding: 64px 0 48px; }
  .grid, .grid.two, .grid.four { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}