/* 바로변환 — 공용 디자인 시스템 (라이트 전용) */
:root {
  --bg: #f6f9f9;
  --bg-card: #ffffff;
  --bg-elev: #eaf1f0;
  --text: #14181a;
  --text-dim: #5c6b6e;
  --border: #d9e3e2;
  --accent: #16a394;
  --radius: 14px;
  --shadow: rgba(16, 40, 40, 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Malgun Gothic', 'Noto Sans KR', sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
  transition: background 0.25s;
}
#app { max-width: 720px; margin: 0 auto; padding: 0 16px; min-height: 100dvh; display: flex; flex-direction: column; }
button, input, select { font-family: inherit; }
a { color: var(--accent); text-decoration: none; }

/* ── 헤더 ── */
.header { display: flex; align-items: center; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 900; font-size: 1.12rem; color: var(--text); }
.icon-btn {
  background: none; border: none; color: var(--text-dim);
  font-size: 1.1rem; width: 36px; height: 36px; border-radius: 8px; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.icon-btn:hover { background: var(--bg-elev); color: var(--text); }

/* ── 메인 ── */
.main { flex: 1; padding: 18px 0 30px; display: flex; flex-direction: column; gap: 16px; }
.main > * { animation: sec-in 0.3s ease backwards; }
.main > *:nth-child(2) { animation-delay: 0.06s; }
.main > *:nth-child(3) { animation-delay: 0.12s; }
@keyframes sec-in { from { opacity: 0; transform: translateY(8px); } }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 2px 12px var(--shadow);
}
h1.page-title { font-size: 1.3rem; font-weight: 900; line-height: 1.35; }
.page-desc { color: var(--text-dim); font-size: 0.9rem; margin-top: 4px; }
.crumb { font-size: 0.8rem; color: var(--text-dim); display: flex; gap: 6px; flex-wrap: wrap; }
.crumb a { color: var(--text-dim); font-weight: 700; }
.crumb a:hover { color: var(--accent); }

/* ── 즉답 박스 (수치 페이지) ── */
.answer {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 14%, var(--bg-card)), var(--bg-card));
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--border));
  border-radius: var(--radius);
  padding: 22px 20px;
  text-align: center;
}
.answer .eq { font-size: 1.7rem; font-weight: 900; letter-spacing: -0.01em; }
.answer .eq b { color: var(--accent); }
.answer .sub { color: var(--text-dim); font-size: 0.85rem; margin-top: 6px; }

/* ── 변환기 위젯 ── */
.conv { display: flex; flex-direction: column; gap: 12px; }
.conv-row { display: flex; gap: 10px; align-items: stretch; }
.conv-cell { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.conv-cell label { font-size: 0.75rem; font-weight: 800; color: var(--text-dim); }
.conv input, .conv select {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 800;
  padding: 12px 13px;
  width: 100%;
  outline: none;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.15s;
}
.conv input:focus, .conv select:focus { border-color: var(--accent); }
.conv select { font-size: 0.95rem; }
.swap-btn {
  align-self: center;
  background: var(--bg-elev); border: 1px solid var(--border);
  color: var(--text); border-radius: 50%;
  width: 40px; height: 40px; font-size: 1.05rem; cursor: pointer;
  transition: transform 0.2s, border-color 0.15s;
}
.swap-btn:hover { border-color: var(--accent); transform: rotate(180deg); }

/* ── 변환표 ── */
.tbl { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { padding: 9px 12px; text-align: right; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.tbl th { color: var(--text-dim); font-size: 0.78rem; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: var(--bg-elev); }
.tbl td a { font-weight: 800; }
.tbl .hl td { background: color-mix(in srgb, var(--accent) 10%, transparent); font-weight: 800; }

/* ── 관련 링크 그리드 ── */
.rel-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.rel-link {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.85rem; font-weight: 700;
  padding: 8px 14px;
  transition: border-color 0.15s;
}
.rel-link:hover { border-color: var(--accent); color: var(--accent); }

/* ── 카테고리/허브 그리드 ── */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.cat-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; color: var(--text);
  display: flex; flex-direction: column; gap: 6px;
  box-shadow: 0 2px 12px var(--shadow);
  transition: transform 0.15s, border-color 0.15s;
}
.cat-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.cat-card .icon { font-size: 1.7rem; }
.cat-card .name { font-weight: 900; }
.cat-card .desc { font-size: 0.82rem; color: var(--text-dim); }

/* ── 공식 박스 ── */
.formula {
  background: var(--bg-elev); border-radius: 10px;
  padding: 13px 16px; font-size: 0.95rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.formula b { color: var(--accent); }

/* ── SEO 텍스트 ── */
.seo-content { border-top: 1px solid var(--border); padding: 22px 0 8px; }
.seo-content h2 { font-size: 1rem; margin: 16px 0 8px; }
.seo-content p, .seo-content li, .seo-content dd { font-size: 0.88rem; color: var(--text-dim); }
.seo-content dt { font-weight: 800; font-size: 0.9rem; margin-top: 10px; color: var(--text); }
.seo-content ol, .seo-content ul { padding-left: 20px; }

/* ── 푸터 ── */
.footer { border-top: 1px solid var(--border); padding: 14px 0 24px; font-size: 0.78rem; color: var(--text-dim); display: flex; flex-wrap: wrap; gap: 6px 14px; }
.footer a { color: var(--text-dim); font-weight: 700; }
.footer a:hover { color: var(--accent); }

/* ── 환율 ── */
.fx-updated { font-size: 0.78rem; color: var(--text-dim); text-align: right; }
.empty {
  color: var(--text-dim); font-size: 0.88rem; padding: 16px; text-align: center;
  border: 1px dashed var(--border); border-radius: 10px;
}

@media (max-width: 480px) {
  .conv-row { flex-direction: column; }
  .swap-btn { transform: rotate(90deg); }
  .swap-btn:hover { transform: rotate(270deg); }
  .answer .eq { font-size: 1.3rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── 쿠팡 파트너스 슬롯 ── */
.promo { margin: 16px 0; text-align: center; }
.promo-label { font-size: 0.68rem; color: var(--text-dim); font-weight: 800; letter-spacing: 0.05em; }
.promo a { font-weight: 800; display: inline-block; margin: 4px 0; }
.promo-disclosure { font-size: 0.72rem; color: var(--text-dim); margin-top: 6px; line-height: 1.5; text-align: center; }
[hidden] { display: none !important; }
.coupang-wrap { display: flex; justify-content: center; margin: 8px 0; min-height: 140px; max-width: 100%; overflow-x: hidden; }

/* ── 쿠팡 사이드 레일 (넓은 화면 전용) ── */
.side-rail { position: fixed; top: 90px; width: 160px; display: none; z-index: 5; }
@media (min-width: 1120px) { .side-rail { display: block; } }
.side-l { left: calc(50% - 544px); }
.side-r { left: calc(50% + 384px); }