/* ============================================================
   리얼샐러리 — 공통 스타일
   모바일 퍼스트 · 본문 최대 720px · CSS 변수 · 다크모드 대응
   ============================================================ */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-alt: #eef1f5;
  --border: #d9dee6;
  --text: #1b2432;
  --text-sub: #55606f;
  --accent: #1d5bd8;
  --accent-strong: #16479f;
  --accent-weak: #e8effc;
  --danger: #c0392b;
  --focus: #1d5bd8;
  --shadow: 0 1px 3px rgba(20, 30, 50, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10141c;
    --surface: #1a2029;
    --surface-alt: #232a36;
    --border: #38404e;
    --text: #e7ebf2;
    --text-sub: #a8b2c1;
    --accent: #7aa5f8;
    --accent-strong: #a3c1fb;
    --accent-weak: #22304a;
    --danger: #ff8a7a;
    --focus: #7aa5f8;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  word-break: keep-all;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 레이아웃 ---------- */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- 헤더 / 내비게이션 ---------- */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.logo:hover { text-decoration: none; }
.logo .logo-mark { color: var(--accent); }

.site-nav {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
}

.site-nav a {
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--text-sub);
  font-weight: 600;
}
.site-nav a:hover { text-decoration: none; background: var(--surface-alt); color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-weak); }

/* ---------- 본문 공통 ---------- */

main { padding: 24px 0 48px; }

h1 {
  font-size: 1.55rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin: 8px 0 6px;
}

.page-desc {
  color: var(--text-sub);
  margin: 0 0 20px;
  font-size: 0.98rem;
}

h2 { font-size: 1.25rem; margin: 40px 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 1.06rem; margin: 24px 0 8px; }

/* ---------- 카드 / 폼 ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 16px;
  box-shadow: var(--shadow);
}

.field { margin-bottom: 16px; }

.field > label,
.field > .field-label {
  display: block;
  font-weight: 700;
  font-size: 0.94rem;
  margin-bottom: 6px;
}

.field .hint {
  font-weight: 400;
  color: var(--text-sub);
  font-size: 0.85rem;
  margin-left: 4px;
}

input[type="text"],
input[type="date"],
select {
  width: 100%;
  padding: 11px 12px;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  min-height: 46px;
}

input[type="text"] { text-align: right; }
input[type="text"]::placeholder { color: var(--text-sub); text-align: right; }

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-weak);
}

input.invalid { border-color: var(--danger); }

.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 5px;
}

.input-suffix {
  position: relative;
  display: flex;
  align-items: center;
}
.input-suffix input { padding-right: 40px; }
.input-suffix .suffix {
  position: absolute;
  right: 13px;
  color: var(--text-sub);
  font-size: 0.95rem;
  pointer-events: none;
}

/* 2열 배치 (좁은 화면에선 1열) */
.field-row { display: grid; grid-template-columns: 1fr; gap: 0 12px; }
@media (min-width: 480px) {
  .field-row { grid-template-columns: 1fr 1fr; }
}

/* ---------- 세그먼트 토글 (라디오 기반) ---------- */

.seg {
  display: flex;
  background: var(--surface-alt);
  border-radius: 10px;
  padding: 3px;
  gap: 3px;
}

.seg input[type="radio"] {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.seg label {
  flex: 1;
  text-align: center;
  padding: 9px 8px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-sub);
  cursor: pointer;
  min-height: 24px;
}

.seg input:checked + label {
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow);
}

.seg input:focus-visible + label {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

/* ---------- 버튼 ---------- */

.btn-primary {
  display: block;
  width: 100%;
  padding: 14px;
  margin-top: 4px;
  font-size: 1.08rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-strong); }
@media (prefers-color-scheme: dark) {
  .btn-primary { color: #0e1524; }
}

.btn-ghost {
  display: inline-block;
  padding: 9px 14px;
  font-size: 0.92rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--accent);
  background: var(--accent-weak);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
.btn-ghost:hover { filter: brightness(0.96); }
.btn-ghost.copied { color: var(--text); }

/* ---------- 결과 영역 ---------- */

.result { margin-top: 24px; }

.result-total {
  text-align: center;
  padding: 22px 16px 18px;
  background: var(--accent-weak);
  border-radius: 12px;
  margin-bottom: 16px;
}

.result-total .label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-sub);
  margin: 0;
}

.result-total .amount {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-strong);
  margin: 2px 0;
  line-height: 1.25;
}

.result-total .sub {
  font-size: 0.92rem;
  color: var(--text-sub);
  margin: 0;
}

.result-summary {
  text-align: center;
  font-size: 0.98rem;
  margin: 0 0 14px;
}

/* ---------- 표 ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

caption {
  text-align: left;
  font-weight: 700;
  padding-bottom: 8px;
}

th, td {
  padding: 9px 8px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

thead th {
  font-size: 0.85rem;
  color: var(--text-sub);
  font-weight: 600;
  border-bottom-width: 2px;
}

td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

tr.total-row th, tr.total-row td { font-weight: 800; border-bottom: none; }

.table-note { font-size: 0.85rem; color: var(--text-sub); margin-top: 8px; }

/* ---------- 고지 / 안내 ---------- */

.disclaimer {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--surface-alt);
  border-radius: 10px;
  font-size: 0.88rem;
  color: var(--text-sub);
}

.notice {
  margin: 16px 0;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--accent-weak);
  border-radius: 0 10px 10px 0;
  font-size: 0.92rem;
}

/* ---------- 광고 슬롯 ----------
   비어 있는 동안은 표시하지 않고(:empty), 광고 유닛(<ins>)이 삽입되면
   min-height 예약이 살아나 로드 시 레이아웃 시프트(CLS)가 없다. */

.ad-slot {
  min-height: 250px;
  margin: 28px 0;
  border: 1px dashed var(--border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-slot:empty { display: none; }

.ad-slot::before {
  content: "광고";
  font-size: 0.78rem;
  color: var(--text-sub);
}

/* ---------- 아코디언 / FAQ ---------- */

details {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  margin-bottom: 10px;
  padding: 0 16px;
}

summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 0.97rem;
  padding: 13px 0;
  list-style-position: outside;
}

details[open] summary { border-bottom: 1px solid var(--border); }

details .details-body { padding: 12px 0 14px; font-size: 0.95rem; }

/* ---------- 본문 콘텐츠 (설명 글) ---------- */

.content-prose { font-size: 0.98rem; }
.content-prose p { margin: 0 0 14px; }
.content-prose ul, .content-prose ol { margin: 0 0 14px; padding-left: 22px; }
.content-prose li { margin-bottom: 6px; }
.content-prose strong { font-weight: 700; }
.content-prose table { margin: 14px 0; }

.example-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}
.example-box h3 { margin-top: 0; }

/* ---------- 허브 카드 ---------- */

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 20px 0;
}
@media (min-width: 560px) {
  .cards-grid { grid-template-columns: 1fr 1fr; }
}

.calc-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 18px;
  color: var(--text);
  box-shadow: var(--shadow);
}
.calc-card:hover { text-decoration: none; border-color: var(--accent); }
.calc-card h2 { margin: 0 0 6px; font-size: 1.1rem; color: var(--accent); }
.calc-card p { margin: 0; font-size: 0.92rem; color: var(--text-sub); }

/* ---------- 내부 링크 박스 ---------- */

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}
.related-links a {
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
}
.related-links a:hover { border-color: var(--accent); text-decoration: none; }

/* ---------- 푸터 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 24px 0 32px;
  font-size: 0.88rem;
  color: var(--text-sub);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-bottom: 12px;
}

.site-footer a { color: var(--text-sub); font-weight: 600; }
.site-footer p { margin: 4px 0; }

/* ---------- 유틸 ---------- */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

[hidden] { display: none !important; }

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }