/* ── 젤리 영단어 GitHub Pages 공통 스타일 ── */
:root {
  --primary: #FFD600;
  --primary-dark: #F5C000;
  --accent: #FF6B6B;
  --text: #1a1a2e;
  --text-sub: #555;
  --bg: #FFFDF0;
  --card: #fff;
  --border: #f0e8c0;
  --radius: 16px;
  --max-w: 760px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

/* ── 헤더 ── */
header {
  background: var(--primary);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

header .logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

header .logo-img {
  height: 36px;
  width: auto;
}

header nav {
  display: flex;
  gap: 20px;
}

header nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity 0.2s;
}

header nav a:hover { opacity: 1; }

/* ── 메인 ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ── 히어로 (index 전용) ── */
.hero {
  text-align: center;
  padding: 60px 0 48px;
}

.hero-emoji { font-size: 4rem; margin-bottom: 16px; }

.hero h1 {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-sub);
  max-width: 480px;
  margin: 0 auto 32px;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--text);
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-size: 1rem;
  border: 2px solid var(--text);
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 3px 3px 0 var(--text);
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--text);
}

/* ── 피처 그리드 ── */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.feature-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}

.feature-card .icon { font-size: 2rem; margin-bottom: 10px; }
.feature-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.feature-card p  { font-size: 0.82rem; color: var(--text-sub); }

/* ── 문서 페이지 (privacy, manual) ── */
.page-header {
  padding: 36px 0 24px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 32px;
}

.page-header .breadcrumb {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 8px;
}

.page-header .breadcrumb a {
  color: var(--text-sub);
  text-decoration: none;
}

.page-header h1 {
  font-size: 1.7rem;
  font-weight: 800;
}

.page-header .updated {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 6px;
}

/* ── 섹션 ── */
.section {
  margin-bottom: 40px;
}

.section h2 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}

.section h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 16px 0 8px;
  color: var(--text-sub);
}

.section p, .section li {
  font-size: 0.9rem;
  color: var(--text-sub);
}

.section ul, .section ol {
  padding-left: 20px;
}

.section li { margin-bottom: 4px; }

/* ── 정보 박스 ── */
.info-box {
  background: #FFF8DC;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin: 16px 0;
}

/* ── 수동 카드 ── */
.manual-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.manual-card .num {
  background: var(--primary);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
  border: 2px solid var(--text);
}

.manual-card .body h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; color: var(--text); }
.manual-card .body p  { font-size: 0.85rem; color: var(--text-sub); }

/* ── 푸터 ── */
footer {
  background: var(--text);
  color: #aaa;
  text-align: center;
  padding: 28px 20px;
  font-size: 0.8rem;
}

footer a { color: var(--primary); text-decoration: none; }

/* ── 반응형 ── */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  header nav { gap: 12px; }
}