:root {
  --ink: #17251f;
  --muted: #68736d;
  --line: #ded9cc;
  --canvas: #f8f6ef;
  --paper: #ffffff;
  --brand: #1f795d;
  --brand-dark: #14271f;
  --mint: #e3f2ec;
  --accent: #e8ad16;
  --warn: #a8522b;
  --shadow: 0 12px 28px rgba(23, 37, 31, 0.07);
  --content: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--canvas); font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; }
button, input, select { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(222,217,204,.85); background: rgba(248,246,239,.96); backdrop-filter: blur(12px); }
.nav { max-width: var(--content); min-height: 76px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--ink); font-family: Georgia, "Nanum Myeongjo", serif; font-size: 1.38rem; font-weight: 800; text-decoration: none; letter-spacing: 0; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { color: var(--ink); font-size: .96rem; font-weight: 700; text-decoration: none; }
.nav-links a:hover { color: var(--brand); }
.menu-button { display: none; border: 0; background: transparent; color: var(--ink); font-size: 1.45rem; cursor: pointer; }

main { max-width: var(--content); min-height: calc(100vh - 160px); margin: 0 auto; padding: 54px 24px 88px; }
.home-main { padding-top: 78px; }
.home-hero { max-width: 760px; margin: 0 auto 76px; text-align: center; }
.eyebrow { margin: 0 0 20px; color: var(--brand); font-size: .9rem; font-weight: 800; }
h1, h2, h3 { color: var(--ink); letter-spacing: 0; }
h1 { margin: 0 0 18px; font-family: Georgia, "Nanum Myeongjo", serif; font-size: clamp(2.3rem, 5vw, 4.25rem); line-height: 1.25; }
h2 { margin: 42px 0 16px; font-family: Georgia, "Nanum Myeongjo", serif; font-size: 1.8rem; line-height: 1.35; }
h3 { margin: 26px 0 8px; font-size: 1.15rem; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 1.06rem; }

.search-box { position: relative; display: flex; max-width: 720px; margin: 30px auto 0; padding: 7px; border: 2px solid var(--ink); border-radius: 8px; background: var(--paper); }
.search-box input { flex: 1; min-width: 0; min-height: 48px; padding: 8px 16px; border: 0; outline: 0; background: transparent; color: var(--ink); }
.search-box button { min-width: 82px; border: 0; border-radius: 6px; background: var(--brand); color: #fff; font-weight: 800; cursor: pointer; }
.search-box button:hover { background: #17664d; }
.search-results { position: absolute; top: calc(100% + 10px); left: 0; right: 0; z-index: 30; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); box-shadow: var(--shadow); text-align: left; }
.search-results a, .search-results p { display: block; margin: 0; padding: 11px 12px; border-radius: 6px; text-decoration: none; }
.search-results a:hover { background: var(--mint); color: var(--brand); }

.home-section { margin-top: 64px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-heading h2 { margin: 0; }
.section-heading span { color: var(--brand); font-size: .88rem; font-weight: 700; }
.category-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; }
.category-card { position: relative; min-height: 188px; padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.84); text-decoration: none; }
.category-card.is-ready { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.category-card.is-ready:hover { transform: translateY(-3px); border-color: #afcdbf; box-shadow: var(--shadow); }
.category-icon { display: grid; width: 48px; height: 48px; margin-bottom: 16px; place-items: center; border-radius: 8px; background: var(--mint); color: var(--brand); font-size: 1.35rem; font-weight: 900; }
.category-card strong { display: block; margin-bottom: 8px; font-size: 1.2rem; }
.category-card p { color: var(--muted); font-size: .9rem; line-height: 1.55; }
.category-card small { position: absolute; right: 18px; top: 18px; color: #8c958f; font-size: .76rem; }
.category-card.is-ready small { color: var(--brand); font-weight: 800; }

.popular-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; }
.popular-grid a { position: relative; min-height: 110px; padding: 22px; border-radius: 8px; background: var(--brand-dark); color: #fff; text-decoration: none; }
.popular-grid small { display: block; margin-bottom: 8px; color: var(--accent); font-weight: 800; }
.popular-grid strong { display: block; padding-right: 24px; font-size: 1.08rem; }
.popular-grid span { position: absolute; right: 20px; bottom: 18px; color: var(--accent); font-size: 1.5rem; }
.latest-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.latest-list a { display: flex; justify-content: space-between; gap: 20px; padding: 20px 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); text-decoration: none; }
.latest-list span { font-weight: 800; }
.latest-list small { color: var(--muted); }
.home-guide { max-width: 820px; margin: 78px auto 0; padding-top: 38px; border-top: 1px solid var(--line); }
.home-guide h2 { margin-top: 0; }
.home-guide p { color: var(--muted); }

.page-head { max-width: 820px; margin-bottom: 28px; }
.page-head h1 { font-size: clamp(2.2rem,4vw,3.5rem); }
.breadcrumb { margin-bottom: 18px; color: var(--muted); font-size: .88rem; }
.breadcrumb a { text-decoration: none; }
.calculator { display: grid; grid-template-columns: minmax(0,1fr) minmax(300px,.8fr); gap: 22px; align-items: start; margin: 26px 0 42px; }
.panel { border: 1px solid var(--line); border-radius: 8px; background: var(--paper); box-shadow: var(--shadow); }
.form-panel, .result-panel { padding: 26px; }
.result-panel { position: sticky; top: 98px; }
.result-panel h2 { margin-top: 0; font-family: inherit; font-size: 1.2rem; }
.field { margin-bottom: 18px; }
label { display: block; margin-bottom: 7px; font-weight: 800; }
input, select { width: 100%; min-height: 48px; padding: 10px 13px; border: 1px solid #cbc8bd; border-radius: 6px; background: #fff; color: var(--ink); }
input:focus, select:focus { outline: 3px solid rgba(31,121,93,.17); border-color: var(--brand); }
.hint { margin-top: 7px; color: var(--muted); font-size: .9rem; }
.result-number { margin: 8px 0 12px; color: var(--brand); font-size: 2.35rem; font-weight: 900; line-height: 1.15; }
.breakdown { margin: 16px 0 0; padding: 0; list-style: none; color: var(--muted); }
.breakdown li { display: flex; justify-content: space-between; gap: 14px; padding: 10px 0; border-top: 1px solid var(--line); }
.notice { margin-top: 16px; padding: 13px 15px; border-left: 4px solid var(--accent); background: #fff9e9; color: #5e4a1d; }
.article { max-width: 820px; }
.article strong { background: linear-gradient(transparent 58%,#dcefe7 58%); font-weight: 900; }
.faq { display: grid; gap: 12px; margin-top: 16px; }
.faq details { padding: 15px 17px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.faq summary { cursor: pointer; font-weight: 800; }
.related { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.related a, .button-link { display: inline-flex; align-items: center; min-height: 42px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 6px; background: #fff; text-decoration: none; font-weight: 800; }
.button-link.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.simple-page { max-width: 820px; padding: 30px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); box-shadow: var(--shadow); }

.category-layout { display: grid; grid-template-columns: 240px minmax(0,1fr); gap: 62px; }
.category-sidebar { padding-top: 4px; }
.category-sidebar > strong { display: block; margin-bottom: 10px; color: var(--muted); font-size: .82rem; }
.category-sidebar a, .category-sidebar span { display: block; padding: 11px 14px; border-radius: 6px; text-decoration: none; font-weight: 700; }
.category-sidebar .active { background: var(--brand); color: #fff; }
.category-content .page-head { max-width: none; }
.category-search { margin: 10px 0 26px; }
.calculator-list-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
.calculator-list-card { min-height: 190px; padding: 25px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.calculator-list-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.calculator-list-card strong { display: block; margin-bottom: 10px; font-size: 1.18rem; }
.calculator-list-card p { color: var(--muted); font-size: .92rem; }
.calculator-list-card b { color: var(--brand); font-size: .9rem; }
.category-guide { max-width: 820px; margin-top: 58px; padding-top: 28px; border-top: 1px solid var(--line); }
.category-guide p { color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); background: var(--canvas); }
.footer-inner { max-width: var(--content); margin: 0 auto; padding: 34px 24px; display: flex; align-items: end; justify-content: space-between; gap: 24px; color: var(--muted); font-size: .88rem; }
.footer-inner p { margin: 0; }
.footer-inner div { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-inner a { color: var(--brand); text-decoration: none; }

@media (max-width: 960px) {
  .category-grid, .popular-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .calculator-list-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .calculator, .category-layout { grid-template-columns: 1fr; }
  .category-sidebar { display: none; }
  .result-panel { position: static; }
}

@media (max-width: 680px) {
  .nav { min-height: 64px; padding: 0 20px; }
  .brand { font-size: 1.2rem; }
  .menu-button { display: block; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 14px 20px 18px; border-bottom: 1px solid var(--line); background: var(--canvas); box-shadow: var(--shadow); }
  .nav-links.is-open { display: grid; gap: 4px; }
  .nav-links a { padding: 10px 0; }
  main { padding: 34px 20px 64px; }
  .home-main { padding-top: 38px; }
  .home-hero { margin-bottom: 52px; text-align: left; }
  .home-hero h1 { font-size: 2.3rem; line-height: 1.32; }
  .home-hero .lead { display: none; }
  .eyebrow { margin-bottom: 14px; }
  .search-box { margin-top: 22px; border-radius: 8px; }
  .search-box input { padding-left: 12px; font-size: .92rem; }
  .search-box button { min-width: 64px; }
  .home-section { margin-top: 46px; }
  .category-grid { gap: 12px; }
  .category-card { min-height: 148px; padding: 18px; }
  .category-icon { width: 42px; height: 42px; margin-bottom: 12px; }
  .category-card strong { font-size: 1rem; }
  .category-card p { margin: 0; font-size: .8rem; }
  .category-card small { display: none; }
  .popular-grid, .latest-list, .calculator-list-grid { grid-template-columns: 1fr; gap: 12px; }
  .popular-grid a { min-height: 78px; padding: 17px 18px; }
  .popular-grid small { display: none; }
  .popular-grid span { bottom: 13px; }
  .latest-list a { display: block; }
  .latest-list small { display: block; margin-top: 4px; }
  .form-panel, .result-panel, .simple-page { padding: 20px; }
  .result-number { font-size: 1.85rem; }
  .footer-inner { align-items: flex-start; flex-direction: column; padding: 28px 20px; }
  .footer-inner div { gap: 14px; }
}