/* style.css — 2422 PERCENT_CALC (퍼센트랩)
   출발점: DesignKit kit-aurora (중앙 정렬 · Pretendard · 둥근 카드) → 평면화 변형
   - 그림자·글래스·그라디언트·글로우 제거, 1px 헤어라인 + 단색 액센트(번트 오렌지 1색)
   - 문장형 계산 행(빈칸 채우기) · 데스크톱 좌측 탭 레일 / 모바일 가로 칩
   - 숫자는 IBM Plex Mono(tabular) */
:root {
  --bg: #faf9f6; --surface: #ffffff; --sunk: #f3f1ec;
  --text: #1c1917; --text-2: #57534e; --text-3: #8a847e;
  --line: #e7e4df; --line-2: #d6d2cb;
  --acc: #c2410c; --acc-ink: #ffffff; --acc-soft: #fbeee6;
  --r: 14px; --r-s: 9px;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans', 'Noto Sans Arabic', sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #131211; --surface: #1b1a18; --sunk: #232120;
  --text: #f3f1ee; --text-2: #c4beb6; --text-3: #8f8880;
  --line: #2e2b28; --line-2: #3d3934;
  --acc: #f0834a; --acc-ink: #1b1a18; --acc-soft: #2d1f17;
  color-scheme: dark;
}
[hidden] { display: none !important; }
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--acc); text-underline-offset: 3px; }
button, input, select { font: inherit; color: inherit; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; }

/* ── header ── */
.top { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 20; }
.top-in { max-width: 1080px; margin: 0 auto; padding: 0 16px; height: 58px; display: flex; align-items: center; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: var(--text); font-weight: 750; letter-spacing: -0.02em; font-size: 1.06rem; white-space: nowrap; }
.mark { width: 28px; height: 28px; border-radius: 8px; background: var(--acc); color: var(--acc-ink); display: grid; place-items: center; font-family: var(--mono); font-weight: 600; font-size: 15px; }
.nav { display: flex; gap: 2px; margin-inline-start: 6px; }
.nav a { color: var(--text-2); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: .94rem; }
.nav a:hover { color: var(--text); background: var(--sunk); }
.nav a[aria-current="page"] { color: var(--text); font-weight: 650; }
.top-tools { margin-inline-start: auto; display: flex; gap: 6px; align-items: center; }
.lang { height: 34px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--surface); padding: 0 8px; font-size: .88rem; max-width: 120px; }
.theme-btn { width: 34px; height: 34px; border: 1px solid var(--line-2); background: var(--surface); border-radius: 8px; display: grid; place-items: center; cursor: pointer; color: var(--text-2); }
@media (max-width: 760px) {
  .top-in { flex-wrap: wrap; height: auto; padding-top: 10px; gap: 8px 12px; }
  .nav { order: 3; width: 100%; margin: 0 -10px; overflow-x: auto; padding-bottom: 6px; }
  .nav a { white-space: nowrap; }
}

/* ── tool ── */
.app { width: 100%; max-width: 1080px; margin: 0 auto; padding: 22px 16px 32px; flex: 1; }
.panels { min-width: 0; }
.app-grid { display: grid; grid-template-columns: 184px minmax(0, 1fr); gap: 22px; align-items: start; }
.rail { position: sticky; top: 76px; display: flex; flex-direction: column; gap: 14px; }
.tabs { display: flex; flex-direction: column; gap: 2px; }
.tab { text-align: start; background: none; border: 0; border-inline-start: 2px solid transparent; padding: 9px 14px; cursor: pointer; color: var(--text-2); font-size: .98rem; border-radius: 0 8px 8px 0; }
[dir="rtl"] .tab { border-radius: 8px 0 0 8px; }
.tab:hover { background: var(--sunk); color: var(--text); }
.tab[aria-selected="true"] { border-inline-start-color: var(--acc); color: var(--text); font-weight: 700; background: var(--surface); }
.dec { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: .85rem; color: var(--text-3); padding: 0 14px; }
.dec select, .opt select, #vCountry { height: 34px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--surface); padding: 0 8px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 6px 22px; }
@media (max-width: 860px) {
  .app { padding-top: 14px; }
  .app-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .rail { position: static; flex-direction: row; align-items: center; justify-content: space-between; gap: 10px; }
  .tabs { flex-direction: row; overflow-x: auto; gap: 6px; scrollbar-width: none; min-width: 0; flex: 1 1 auto; }
  .tab { border: 1px solid var(--line-2); border-radius: 999px; padding: 6px 14px; white-space: nowrap; background: var(--surface); }
  [dir="rtl"] .tab { border-radius: 999px; }
  .tab[aria-selected="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }
  .dec { padding: 0; white-space: nowrap; }
  .panel { padding: 4px 16px; }
}

/* 문장형 행 */
.row { padding: 18px 0; border-bottom: 1px solid var(--line); }
.row:last-child { border-bottom: 0; }
.q { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 8px; font-size: 1.06rem; color: var(--text-2); }
.q .num { width: 8.2em; }
.num { height: 42px; border: 0; border-bottom: 2px solid var(--line-2); background: transparent; padding: 0 4px; font-family: var(--mono); font-size: 1.12rem; font-weight: 500; color: var(--text); border-radius: 0; text-align: end; }
.num:focus { outline: none; border-bottom-color: var(--acc); background: var(--acc-soft); }
.num::placeholder { color: var(--text-3); }
.dir { height: 36px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--surface); padding: 0 6px; font-size: .98rem; }

.res { display: flex; align-items: center; gap: 12px; margin-top: 10px; min-height: 40px; }
.r-lab { color: var(--text-2); font-size: .92rem; min-width: 9em; }
.r-val { font-family: var(--mono); font-size: 1.5rem; font-weight: 600; color: var(--acc); letter-spacing: -0.01em; word-break: break-all; }
.res.is-empty .r-val { color: var(--text-3); font-weight: 400; font-size: 1.2rem; }
.copy { margin-inline-start: auto; border: 1px solid var(--line-2); background: var(--surface); border-radius: 8px; padding: 5px 12px; font-size: .84rem; cursor: pointer; color: var(--text-2); flex: none; }
.copy:hover { border-color: var(--acc); color: var(--acc); }
.res.is-empty .copy { visibility: hidden; }
.fx { margin: 6px 0 0; font-family: var(--mono); font-size: .84rem; color: var(--text-3); direction: ltr; unicode-bidi: isolate; overflow-wrap: anywhere; }
[dir="rtl"] .fx { text-align: end; }
.fx:empty { display: none; }

/* 필드형 패널 */
.fields { display: grid; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.fields.two { grid-template-columns: 1fr 1fr; }
.f { display: grid; gap: 6px; }
.f > span, .mini > span, .opt > span { font-size: .88rem; color: var(--text-2); }
.f .num { width: 100%; max-width: 360px; text-align: start; }
.rates { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.rate-item { display: flex; align-items: center; gap: 2px; }
.rate-item .num { width: 6.5em; }
.rate-item::after { content: '%'; font-family: var(--mono); color: var(--text-3); margin-inline-start: 2px; }
.x { border: 0; background: none; color: var(--text-3); cursor: pointer; font-size: 1.1rem; padding: 0 6px; order: 2; }
.x:hover { color: var(--acc); }
.ghost { justify-self: start; border: 1px dashed var(--line-2); background: none; border-radius: 8px; padding: 6px 12px; cursor: pointer; color: var(--text-2); font-size: .9rem; }
.ghost:hover { border-color: var(--acc); color: var(--acc); }
.opt { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.opt > span { margin-inline-end: 4px; }
.pair { display: flex; flex-wrap: wrap; align-items: end; gap: 10px 14px; }
.mini { display: grid; gap: 4px; }
.mini .num { width: 8em; }
#vCountry { max-width: 100%; min-width: 0; flex: 1 1 220px; }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line-2); border-radius: 10px; padding: 3px; gap: 3px; justify-self: start; background: var(--sunk); }
.seg-b { border: 0; background: none; padding: 6px 12px; border-radius: 7px; cursor: pointer; color: var(--text-2); font-size: .92rem; }
.seg-b[aria-pressed="true"] { background: var(--surface); color: var(--text); font-weight: 650; box-shadow: 0 0 0 1px var(--line-2); }
.out { padding: 12px 0 18px; }
.out .res { border-bottom: 1px dashed var(--line); padding-bottom: 8px; }
.note { margin: 12px 0 0; padding: 10px 12px; border-inline-start: 3px solid var(--acc); background: var(--acc-soft); font-size: .92rem; color: var(--text); }
.steps { margin: 12px 0 0; padding-inline-start: 1.4em; font-family: var(--mono); font-size: .85rem; color: var(--text-2); }
.steps:empty { display: none; }
.conv { border-top: 1px solid var(--line); padding: 16px 0 20px; }
.conv-h { font-size: .95rem; margin: 0 0 10px; font-weight: 650; }
.arrow { color: var(--text-3); padding-bottom: 10px; }
@media (max-width: 560px) {
  .q { font-size: 1rem; }
  .q .num { width: 6.6em; }
  .r-val { font-size: 1.28rem; }
  .r-lab { min-width: 0; flex: 1; }
  .out .res { flex-wrap: wrap; }
  .out .res .r-val { order: 3; width: 100%; }
  .fields.two { grid-template-columns: 1fr; }
}

/* ── ads (애드핏 규정: 래퍼에 radius·overflow 금지) ── */
.ad-wrap { margin: 26px auto 0; }
.ad-grid { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 100%; max-width: 672px; margin: 0 auto; }
.ad-grid[data-ad-layout="mixed"] { max-width: 760px; }
.ad-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; width: 100%; }
.ad-cell { min-height: 50px; max-width: 100%; }
.ad-pc { display: none; }
@media (min-width: 720px) { .ad-pc { display: flex; } .ad-mo { display: none; } }
.prose .ad-wrap { margin: 30px 0; }

/* ── content pages ── */
.page { width: 100%; max-width: 760px; margin: 0 auto; padding: 18px 16px 48px; flex: 1; }
.page.wide { max-width: 1080px; }
.crumb { font-size: .84rem; color: var(--text-3); display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.crumb a { color: var(--text-2); text-decoration: none; }
.crumb .sep { color: var(--line-2); }
.prose { font-size: 1.02rem; line-height: 1.8; }
.prose h1, .page-h { font-size: clamp(1.5rem, 4.2vw, 2.05rem); line-height: 1.3; letter-spacing: -0.025em; margin: 0 0 14px; }
.prose h2 { font-size: 1.22rem; margin: 36px 0 10px; letter-spacing: -0.015em; padding-top: 14px; border-top: 1px solid var(--line); }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { padding-inline-start: 1.3em; margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--sunk); padding: 1px 5px; border-radius: 5px; }
.lead { color: var(--text-2); font-size: 1.05rem; }
.formula-box { font-family: var(--mono); font-size: .95rem; background: var(--surface); border: 1px solid var(--line); border-inline-start: 3px solid var(--acc); padding: 12px 14px; border-radius: 0 var(--r-s) var(--r-s) 0; unicode-bidi: plaintext; }
[dir="rtl"] .formula-box { border-radius: var(--r-s) 0 0 var(--r-s); }
.tbl { overflow-x: auto; margin: 0 0 18px; border: 1px solid var(--line); border-radius: var(--r-s); background: var(--surface); }
.tbl table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.tbl th, .tbl td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: start; vertical-align: top; }
.tbl thead th { background: var(--sunk); font-weight: 650; font-size: .85rem; color: var(--text-2); white-space: nowrap; }
.tbl tbody tr:last-child th, .tbl tbody tr:last-child td { border-bottom: 0; }
.rates-t tbody th { font-weight: 600; white-space: nowrap; }
.num-c { font-family: var(--mono); white-space: nowrap; }
.rate-a { font-weight: 600; text-decoration: none; }
.note-c { color: var(--text-2); font-size: .86rem; }
.src { font-size: .8rem; color: var(--text-3); }
.fn { font-size: .86rem; color: var(--text-2); }
.r-val { direction: ltr; unicode-bidi: isolate; }
[dir="rtl"] .r-val, [dir="rtl"] .fx, [dir="rtl"] .steps { font-family: var(--sans); font-variant-numeric: tabular-nums; letter-spacing: 0; }
.muted { color: var(--text-3); font-family: var(--sans); font-size: .86rem; }
.stamp { display: inline-block; font-family: var(--mono); font-size: .82rem; color: var(--text-2); border: 1px solid var(--line-2); border-radius: 6px; padding: 2px 8px; }
.btn { display: inline-block; background: var(--acc); color: var(--acc-ink); text-decoration: none; padding: 9px 16px; border-radius: 9px; font-weight: 650; font-size: .95rem; }
.btn:hover { filter: brightness(1.06); }
.cta { margin-top: 26px; }
.faq { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 650; }
.faq p { margin: 8px 0 0; color: var(--text-2); }
.mail { font-size: 1.05rem; }
.related { margin-top: 30px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; margin: 20px 0 8px; }
.card { display: grid; gap: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; text-decoration: none; color: var(--text); }
.card:hover { border-color: var(--acc); }
.card-n { font-family: var(--mono); color: var(--acc); font-size: .85rem; font-weight: 600; }
.card-t { font-weight: 700; line-height: 1.4; }
.card-d { color: var(--text-2); font-size: .9rem; line-height: 1.55; }
.nf { text-align: center; padding-top: 40px; }
.nf-code { font-family: var(--mono); font-size: 4rem; color: var(--acc); margin: 0; }
.nf-langs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 14px; margin-top: 24px; font-size: .9rem; }

/* ── footer ── */
.foot { border-top: 1px solid var(--line); margin-top: 24px; }
.foot-in { max-width: 1080px; margin: 0 auto; padding: 24px 16px 32px; display: grid; gap: 12px; }
.foot-main, .foot-guides { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.foot-main a { color: var(--text-2); text-decoration: none; font-size: .9rem; }
.foot-guides a { color: var(--text-3); text-decoration: none; font-size: .82rem; }
.foot a:hover { color: var(--acc); }
.copyright { margin: 6px 0 0; font-size: .8rem; color: var(--text-3); }

.toast { position: fixed; left: 50%; bottom: 22px; transform: translate(-50%, 16px); background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 9px; font-size: .9rem; opacity: 0; pointer-events: none; transition: opacity .18s, transform .18s; z-index: 50; max-width: calc(100% - 32px); }
.toast.on { opacity: 1; transform: translate(-50%, 0); }