:root {
  --primary: #1a56db;
  --primary-dark: #1e429f;
  --primary-light: #e8f0fe;
  --text-dark: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg-light: #f9fafb;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
}

/* ── 헤더 ── */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}
.site-logo:hover { color: var(--primary-dark); }

/* ── 광고 슬롯 ── */
.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f3f4f6;
  border: 1px dashed #d1d5db;
  color: var(--text-muted);
  font-size: .75rem;
  margin: 0 auto;
  border-radius: 4px;
}
.ad-header  { width: 728px; height: 90px; max-width: 100%; }
.ad-result  { width: 300px; height: 250px; }
.ad-footer  { width: 320px; height: 50px; max-width: 100%; }

/* ── 메인 히어로 ── */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  color: #fff;
  padding: 3rem 0 2.5rem;
}
.hero h1 { font-size: 2rem; font-weight: 800; }
.hero p   { opacity: .85; }

/* ── 도구 카드 ── */
.tool-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: box-shadow .2s, transform .2s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.tool-card:hover {
  box-shadow: 0 8px 24px rgba(26,86,219,.12);
  transform: translateY(-2px);
  color: inherit;
}
.tool-card .card-icon {
  width: 52px; height: 52px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.tool-card .card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .25rem;
}
.tool-card .card-desc {
  font-size: .85rem;
  color: var(--text-muted);
}
.badge-new {
  background: #fee2e2;
  color: #dc2626;
  font-size: .7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
}

/* ── 계산기 페이지 ── */
.calc-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}
.calc-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
}
.input-group-text { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}
.btn-calc {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: .75rem 2rem;
  border-radius: 10px;
  border: none;
  width: 100%;
  transition: background .2s;
}
.btn-calc:hover { background: var(--primary-dark); color: #fff; }

/* ── 결과 박스 ── */
.result-box {
  background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  border-radius: 14px;
  padding: 1.5rem;
  color: #fff;
  text-align: center;
}
.result-box .label { font-size: .9rem; opacity: .85; }
.result-box .amount {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -.02em;
}
.result-box .sub { font-size: .85rem; opacity: .75; margin-top: .25rem; }

.deduction-table { border-radius: 12px; overflow: hidden; }
.deduction-table .table { margin-bottom: 0; }
.deduction-table .table th {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: .85rem;
  border: none;
}
.deduction-table .table td { font-size: .9rem; vertical-align: middle; border-color: var(--border); }
.deduction-table .table .total-row td {
  background: var(--primary-light);
  font-weight: 700;
  color: var(--primary);
}
.tag { display: inline-block; font-size: .72rem; padding: 1px 7px; border-radius: 99px; }
.tag-ins  { background: #ede9fe; color: #7c3aed; }
.tag-tax  { background: #fef3c7; color: #d97706; }

/* ── 푸터 ── */
.site-footer {
  background: #1f2937;
  color: #9ca3af;
  font-size: .82rem;
}
.site-footer a { color: #9ca3af; }

/* ── 반응형 ── */
@media (max-width: 767px) {
  .hero h1 { font-size: 1.5rem; }
  .result-box .amount { font-size: 1.9rem; }
  .ad-header { display: none; }
  .calc-card { padding: 1.25rem; }
}