:root {
  --navy: #0b2e6b;      /* 제목·강조 진청 */
  --navy-2: #0a6ff5;    /* 로고 블루 */
  --sky: #8fe3f5;       /* 로고 하늘색 */
  --gold: #0a6ff5;      /* 버튼 강조(로고 블루) */
  --gold-soft: #eaf3ff;
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #e2e5ea;
  --text: #1b2430;
  --muted: #667085;
  --accent: #1f6feb;
  --danger: #c0392b;
  --warn-bg: #fff8e6;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: 'Pretendard Variable', Pretendard, -apple-system, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  font-size: 15px; line-height: 1.6; word-break: keep-all;
}
a { color: inherit; }
img { max-width: 100%; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
[hidden] { display: none !important; }

/* header */
.site-header { background: #fff; color: var(--text); position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); }
.site-header .container { display: flex; align-items: center; gap: 20px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); flex-shrink: 0; }
.brand-logo { height: 40px; width: auto; display: block; }
.brand-center { font-weight: 800; font-size: 16px; padding-left: 10px; border-left: 1px solid var(--line); letter-spacing: -.01em; }
.nav { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav > .nav-item { position: relative; }
.nav > .nav-item > a, .nav > .nav-item > button {
  display: block; padding: 20px 9px; color: #344054; text-decoration: none; font-size: 14px; background: none; border: 0; font: inherit; cursor: pointer;
}
.nav > .nav-item:hover > a, .nav > .nav-item:hover > button { color: var(--navy-2); }
.nav > .nav-item > a, .nav > .nav-item > button { white-space: nowrap; }
@media (min-width: 1241px) and (max-width: 1440px) {
  .nav > .nav-item > button { padding: 20px 6px; font-size: 13.5px; }
  .nav .nav-cta > a { padding: 8px 11px; margin-left: 4px; }
  .brand-center { font-size: 15px; }
}
.nav .dropdown {
  display: none; position: absolute; top: 100%; left: 0; min-width: 220px; background: #fff; color: var(--text);
  border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.18); padding: 8px; z-index: 30;
}
.nav > .nav-item:hover .dropdown, .nav > .nav-item:focus-within .dropdown { display: block; }
.dropdown a { display: block; padding: 7px 10px; border-radius: 6px; text-decoration: none; font-size: 14px; }
.dropdown a:hover { background: var(--bg); }
.nav .nav-cta > a { background: var(--gold); color: #fff; border-radius: 8px; padding: 8px 14px; margin-left: 6px; font-weight: 700; }
#nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--navy); border-radius: 8px; padding: 6px 10px; font: inherit; }

/* hero */
.hero { background: linear-gradient(120deg, #0b2e6b 0%, #0a5bd0 60%, #0a6ff5 100%); color: #fff; padding: 44px 0 36px; }
.hero h1 { margin: 0 0 6px; font-size: 30px; letter-spacing: -.02em; }
.hero p { margin: 0 0 20px; color: #d6e6ff; }
.hero .eyebrow { display: inline-block; font-size: 13px; color: var(--sky); font-weight: 700; margin-bottom: 6px; }
.search { position: relative; max-width: 560px; }
.search input { width: 100%; padding: 14px 16px; border-radius: 10px; border: 0; font: inherit; font-size: 16px; }

.featured { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: -22px; }
.tile {
  background: var(--card); border-radius: var(--radius); padding: 16px; text-decoration: none; box-shadow: var(--shadow);
  border: 1px solid var(--line); display: block; transition: transform .12s, border-color .12s;
}
.tile:hover { transform: translateY(-2px); border-color: var(--navy-2); }
.tile strong { display: block; font-size: 16px; color: var(--navy); }
.tile span { font-size: 13px; color: var(--muted); }

.cat-section { margin: 34px 0; }
.cat-section h2 { font-size: 19px; margin: 0 0 4px; color: var(--navy); }
.cat-section > p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.calc-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.calc-link { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; text-decoration: none; display: block; }
.calc-link:hover { border-color: var(--navy-2); }
.calc-link b { display: block; font-size: 15px; }
.calc-link small { color: var(--muted); }
.badge { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 4px; background: #eef1f5; color: var(--muted); margin-left: 4px; vertical-align: middle; font-weight: 500; }

.banner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  background: var(--gold-soft); border: 1px solid #cfe2ff; border-radius: var(--radius); padding: 20px 22px; margin: 28px 0;
}
.banner h3 { margin: 0 0 2px; color: var(--navy); }
.banner p { margin: 0; color: #344b70; font-size: 14px; }
.banner.dark { background: var(--navy); border-color: var(--navy); color: #fff; }
.banner.dark h3 { color: #fff; } .banner.dark p { color: #c9d3e0; }

/* calc page */
.page-head { padding: 22px 0 8px; }
.crumbs { font-size: 13px; color: var(--muted); }
.crumbs a { text-decoration: none; }
.page-head h1 { margin: 4px 0 2px; font-size: 26px; color: var(--navy); letter-spacing: -.02em; }
.page-head p { margin: 0; color: var(--muted); }
.calc-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 18px; align-items: start; margin: 14px 0 26px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.calc-output { position: sticky; top: 76px; }
.card h2 { margin: 0 0 14px; font-size: 17px; color: var(--navy); }

.fields { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px 14px; }
.field, .group, .note, .field-heading { grid-column: span 2; }
.field.half { grid-column: span 1; }
.field-heading { margin: 8px 0 -4px; font-size: 14px; color: var(--navy-2); border-top: 1px dashed var(--line); padding-top: 12px; }
.label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.help { display: block; color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.err { display: block; color: var(--danger); font-size: 13px; margin-top: 4px; }
.has-err input { border-color: var(--danger); }
.note { margin: 0; font-size: 13px; color: var(--muted); background: var(--bg); border-radius: 8px; padding: 8px 10px; }
input[type=text], input[type=date], select {
  max-width: 100%; min-width: 0;
  width: 100%; padding: 10px 12px; border: 1px solid #cfd5dd; border-radius: 8px; font: inherit; font-size: 15px; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: 2px solid #1f6feb33; border-color: var(--accent); }
.with-unit { position: relative; display: flex; flex-wrap: wrap; align-items: center; }
.with-unit input { padding-right: 40px; text-align: right; }
.with-unit .unit { position: absolute; right: 12px; top: 10px; color: var(--muted); font-size: 14px; pointer-events: none; }
.with-unit .hint { flex-basis: 100%; text-align: right; font-size: 12.5px; color: var(--navy-2); min-height: 0; margin-top: 2px; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button {
  flex: 1 1 auto; padding: 9px 12px; border: 1px solid #cfd5dd; background: #fff; border-radius: 8px; font: inherit; font-size: 14px; cursor: pointer; color: var(--text);
}
.seg button.on { background: var(--navy-2); color: #fff; border-color: var(--navy-2); }
.check { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14.5px; }
.check input { width: 18px; height: 18px; accent-color: var(--navy); }
.group { border: 1px solid var(--line); border-radius: 10px; padding: 12px; background: #fafbfc; }
.group-label { font-weight: 700; margin-bottom: 8px; }
.group-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; padding: 10px 0; border-bottom: 1px dashed var(--line); }
.group-row > .field { grid-column: span 1; }
.group-row > .field.wide, .group-row > .note { grid-column: span 2; }
.group-row-head { grid-column: span 2; display: flex; justify-content: space-between; align-items: center; }
.form-actions { display: flex; gap: 8px; margin-top: 18px; }
.btn-primary { flex: 1; padding: 13px; border: 0; border-radius: 10px; background: var(--navy); color: #fff; font: inherit; font-weight: 700; font-size: 16px; cursor: pointer; }
.btn-primary { background: var(--navy-2); }
.btn-primary:hover { background: #075bd0; }
.btn-ghost { padding: 10px 14px; border: 1px solid #cfd5dd; background: #fff; border-radius: 10px; font: inherit; font-size: 14px; cursor: pointer; color: var(--text); text-decoration: none; }
.btn-gold { display: inline-block; padding: 11px 18px; border-radius: 10px; background: var(--gold); color: #fff; font-weight: 700; text-decoration: none; }
.btn-text { background: none; border: 0; color: var(--danger); cursor: pointer; font: inherit; font-size: 13px; }

.result-actions { display: flex; gap: 6px; justify-content: flex-end; margin-bottom: 10px; }
.placeholder { color: var(--muted); text-align: center; padding: 40px 0; margin: 0; }
.summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin-bottom: 14px; }
.sum-item { background: var(--bg); border-radius: 10px; padding: 12px 14px; }
.sum-item.strong { background: linear-gradient(120deg, #0b2e6b, #0a6ff5); color: #fff; }
.sum-label { display: block; font-size: 13px; opacity: .8; }
.sum-value { display: block; font-size: 21px; font-weight: 800; letter-spacing: -.01em; }
.sum-sub { display: block; font-size: 12px; opacity: .75; }
.result-table h3 { font-size: 15px; margin: 16px 0 6px; color: var(--navy); }
.table-scroll { overflow-x: auto; }
table.result { width: 100%; border-collapse: collapse; font-size: 14px; }
table.result th, table.result td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
table.result thead th { background: #f0f2f5; font-weight: 600; font-size: 13px; color: var(--muted); }
table.result tbody th { font-weight: 500; }
table.result td.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
table.result td.memo { color: var(--muted); font-size: 13px; }
table.result tr.sub th { padding-left: 22px; color: var(--muted); }
table.result tr.strong th, table.result tr.strong td.num { font-weight: 700; }
table.result tr.total { background: var(--gold-soft); }
table.result tr.total th, table.result tr.total td.num { font-weight: 800; color: var(--navy); }
table.grid td { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
table.grid td:first-child { text-align: left; }
.alert { padding: 10px 12px; border-radius: 8px; background: #eef4ff; margin: 10px 0; font-size: 14px; }
.alert.error { background: #fdecea; color: var(--danger); }
.alert.warn { background: var(--warn-bg); color: #7a5a00; }
.alert p { margin: 2px 0; }
.notes h3 { font-size: 15px; color: var(--navy); margin: 18px 0 6px; }
.notes ul { margin: 0; padding-left: 18px; color: #475467; font-size: 14px; }

.info { margin: 0 0 26px; }
.info .card { margin-bottom: 14px; }
.info h2 { font-size: 18px; }
.info table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 8px 0; }
.info th, .info td { border: 1px solid var(--line); padding: 6px 8px; text-align: center; }
.info th { background: #f0f2f5; }
.refs a { color: var(--accent); }
.related { display: flex; flex-wrap: wrap; gap: 8px; }
.related a { padding: 6px 12px; background: #fff; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: 14px; }
.disclaimer { font-size: 13px; color: var(--muted); }

.site-footer { background: #0b2440; color: #9fb0c5; padding: 28px 0 36px; font-size: 13px; margin-top: 30px; }
.site-footer strong { color: #fff; font-size: 15px; }
.site-footer a { color: #c9d3e0; }
.site-footer p { margin: 4px 0; }

@media (max-width: 1240px) {
  #nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 10px 20px rgba(0,0,0,.08); flex-direction: column; align-items: stretch; padding: 8px 16px 16px; max-height: calc(100vh - 60px); overflow: auto; }
  body.nav-open .nav { display: flex; }
  .nav > .nav-item > a, .nav > .nav-item > button { padding: 10px 4px; }
  .nav .dropdown { display: none; position: static; box-shadow: none; background: transparent; padding: 0 0 6px 10px; }
  .nav > .nav-item:hover .dropdown, .nav > .nav-item:focus-within .dropdown { display: none; }
  .nav > .nav-item.open .dropdown { display: block; }
  .nav > .nav-item > button::after { content: ' ▾'; color: var(--muted); }
  .nav > .nav-item.open > button::after { content: ' ▴'; }
  .nav > .nav-item > button { width: 100%; text-align: left; border-bottom: 1px solid var(--line); }
  .nav .dropdown a { color: #475467; padding: 4px 6px; }
  .nav > .nav-item > button { font-weight: 700; color: var(--navy); }
  .brand-center { font-size: 14px; }
  .brand-logo { height: 34px; }
  .nav .nav-cta > a { margin: 8px 0 0; text-align: center; }
}
@media (max-width: 900px) {
  .calc-layout { grid-template-columns: minmax(0, 1fr); }
  .calc-output { position: static; }
  .featured { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 24px; }
}
@media (max-width: 520px) {
  .fields, .group-row { grid-template-columns: minmax(0, 1fr); }
  .field.half, .group-row > .field { grid-column: span 1; }
  .field, .group, .note, .field-heading, .group-row-head, .group-row > .field.wide { grid-column: span 1; }
  .card { padding: 16px; }
}
@media print {
  .site-header, .site-footer, .calc-form-card, .result-actions, .info, .banner, .related-wrap { display: none !important; }
  .calc-layout { grid-template-columns: 1fr; }
  body { background: #fff; }
  .card { box-shadow: none; border: 0; }
}

.card { min-width: 0; }
.seg button { min-width: 0; white-space: normal; }
.info .card { overflow-x: auto; }

/* 방문자 카운터(우측 하단) */
.visit-counter { position: fixed; right: 10px; bottom: calc(8px + env(safe-area-inset-bottom, 0px)); z-index: 15; font-size: 11px; line-height: 1; color: var(--muted); background: rgba(255,255,255,.88); border: 1px solid var(--line); border-radius: 999px; padding: 6px 10px; pointer-events: none; font-variant-numeric: tabular-nums; }
.visit-counter b { color: var(--navy-2); font-weight: 700; }
@media print { .visit-counter { display: none; } }