/* 단위변환기 스타일 — 색 토큰은 타임보드·Sign PDF와 같은 틀이고 기본색만 옛 앱의 파랑(#0070c0). 다크 모드에서 토큰을 다시 지정한다. */
:root {
  color-scheme: light dark;
  --bg: #f5f6fa; --card: #ffffff; --foreground: #1a1a2e; --muted: #5b6075;
  --border: #d6d9e3; --border-strong: #b8bdcf;
  --accent: #0070c0; --accent-hover: #005d9f; --accent-text: #0064ad; --accent-soft: #0070c01c;
  --danger: #b91c1c; --row-hover: #f0f3f9;
  --num-font: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117; --card: #181b24; --foreground: #e6e8ef; --muted: #a0a6b8;
    --border: #2c3140; --border-strong: #3c4254;
    --accent: #2b8fd8; --accent-hover: #4aa3e6; --accent-text: #7cc0f5; --accent-soft: #3b9ce22b;
    --danger: #f87171; --row-hover: #1f2330;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", sans-serif; background: var(--bg); color: var(--foreground); margin: 0; line-height: 1.55; }
a { color: var(--accent-text); }
[hidden] { display: none !important; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 20px 20px 0; }
code { font: 0.86em ui-monospace, Menlo, Consolas, monospace; padding: 1px 5px; border-radius: 5px; background: var(--accent-soft); }

/* ---- 헤더·분류 막대·푸터 ---- */
.site-header { background: var(--card); }
.site-header .inner { max-width: 1080px; margin: 0 auto; padding: 10px 20px 4px; padding-top: max(10px, env(safe-area-inset-top)); display: flex; align-items: center; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.2rem; color: var(--foreground); text-decoration: none; padding: 4px 0; }
.brand svg { width: 30px; height: 30px; flex: none; }
.install { margin-left: auto; }
.catbar { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.catbar .inner { max-width: 1080px; margin: 0 auto; padding: 6px 14px 8px; display: flex; flex-wrap: wrap; gap: 4px; }
.catbar a { display: inline-flex; align-items: center; gap: 6px; padding: 7px 11px; border-radius: 999px; font-size: 0.92rem; font-weight: 600; color: var(--foreground); text-decoration: none; white-space: nowrap; }
.catbar a svg { width: 18px; height: 18px; flex: none; opacity: 0.7; }
.catbar a:hover { background: var(--accent-soft); }
.catbar a[aria-current="page"] { background: var(--accent); color: #fff; }
.catbar a[aria-current="page"] svg { opacity: 1; }
@media (max-width: 760px) {
  .site-header .inner { padding: 8px 14px 2px; padding-top: max(8px, env(safe-area-inset-top)); }
}
/* 분류가 13개라 한 줄에 다 안 들어가는 폭에서는 옆으로 밀어 보게 한다 */
@media (max-width: 1040px) {
  .catbar .inner { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding: 6px 10px 8px; -webkit-mask-image: linear-gradient(90deg, #000 92%, transparent); mask-image: linear-gradient(90deg, #000 92%, transparent); }
  .catbar .inner::-webkit-scrollbar { display: none; }
  .catbar a { padding: 7px 10px; font-size: 0.9rem; }
}
.site-footer { margin-top: 56px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.82rem; }
.site-footer .inner { max-width: 1080px; margin: 0 auto; padding: 20px 20px 40px; padding-bottom: max(40px, env(safe-area-inset-bottom)); display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--foreground); }

/* ---- 머리말 ---- */
.tool-head, .hero { display: flex; align-items: baseline; flex-wrap: wrap; gap: 2px 14px; margin: 0 0 14px; }
.tool-head h1, .hero h1 { font-size: 1.55rem; line-height: 1.3; margin: 0; letter-spacing: -0.01em; }
.tool-head .sub, .hero .sub { margin: 0; color: var(--muted); font-size: 0.98rem; }
@media (max-width: 600px) { .tool-head h1, .hero h1 { font-size: 1.3rem; } .tool-head .sub, .hero .sub { font-size: 0.88rem; } }

/* ---- 변환기 ---- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 0 0 12px; }
.tabs button { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--card); color: var(--foreground); font: inherit; font-size: 0.95rem; font-weight: 600; cursor: pointer; }
.tabs button:hover { border-color: var(--accent); }
.tabs button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.conv-grid { display: grid; grid-template-columns: minmax(280px, 380px) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 760px) { .conv-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; } }
.in-card { padding: 16px 18px 14px; position: sticky; top: 64px; }
@media (max-width: 760px) { .in-card { position: static; padding: 14px 14px 12px; } }
.lbl { display: block; font-size: 0.82rem; font-weight: 700; color: var(--muted); margin: 0 0 6px; }
.lbl + select { margin-bottom: 0; }
.in-row { display: flex; gap: 8px; }
#val { flex: 1; min-width: 0; height: 60px; padding: 0 14px; border: 2px solid var(--border-strong); border-radius: 12px; background: var(--bg); color: var(--foreground); font: 700 1.9rem var(--num-font); font-variant-numeric: tabular-nums; text-align: right; }
#val:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
#val.bad { border-color: var(--danger); }
.pm { flex: none; width: 52px; height: 60px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--card); color: var(--foreground); font: 600 1.4rem var(--num-font); cursor: pointer; touch-action: manipulation; }
.pm:hover { border-color: var(--accent); color: var(--accent-text); }
.calc { margin: 6px 2px 0; text-align: right; font: 600 0.95rem var(--num-font); color: var(--accent-text); }
.calc.err { color: var(--danger); font-family: inherit; }
.in-card .lbl[for="unit"] { margin-top: 14px; }
#unit { width: 100%; height: 48px; padding: 0 12px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--card); color: var(--foreground); font: inherit; font-size: 1.05rem; font-weight: 600; }
#unit:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.def { margin: 8px 2px 0; font-size: 0.86rem; color: var(--muted); }
.in-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--border); font-size: 0.86rem; color: var(--muted); }
.in-foot label { display: inline-flex; align-items: center; gap: 6px; }
.in-foot select { padding: 5px 6px; border: 1px solid var(--border-strong); border-radius: 8px; background: var(--card); color: var(--foreground); font: inherit; }
.in-card .hint { margin: 10px 0 0; font-size: 0.8rem; color: var(--muted); line-height: 1.6; }
@media (max-width: 760px) { .in-card .hint { display: none; } }

.results { list-style: none; margin: 0; padding: 4px 0; overflow: hidden; }
.r { display: flex; align-items: stretch; border-bottom: 1px solid var(--border); }
.r:last-child { border-bottom: 0; }
.r-main { flex: 1; min-width: 0; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 8px 12px 18px; border: 0; background: transparent; color: inherit; font: inherit; text-align: left; cursor: pointer; }
button.r-main:hover { background: var(--row-hover); }
.r-val { font: 700 1.28rem var(--num-font); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; letter-spacing: -0.01em; }
.r-unit { flex: none; display: flex; flex-direction: column; align-items: flex-end; text-align: right; line-height: 1.25; max-width: 48%; }
.r-unit b { font-size: 1rem; }
.r-unit small { font-size: 0.78rem; color: var(--muted); }
.r.cur { background: var(--accent-soft); box-shadow: inset 4px 0 0 var(--accent); }
.r.cur .r-main { cursor: default; }
.r.cur button.r-main:hover { background: transparent; }
.r.compound .r-main { cursor: default; padding-top: 6px; padding-bottom: 10px; }
.r.compound .r-val { font-size: 1.05rem; color: var(--muted); }
.r-copy { flex: none; width: 46px; display: grid; place-items: center; border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.r-copy svg { width: 18px; height: 18px; }
.r-copy:hover { color: var(--accent-text); background: var(--row-hover); }
.r-main:focus-visible, .r-copy:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
@media (max-width: 600px) {
  .r-main { padding: 11px 4px 11px 14px; }
  .r-val { font-size: 1.15rem; }
  .r-copy { width: 42px; }
}

/* ---- 버튼 ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 15px; font: inherit; font-size: 0.9rem; font-weight: 600; border-radius: 9px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.ghost { background: transparent; color: var(--foreground); border-color: var(--border-strong); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent-text); }
.btn.small { padding: 5px 10px; font-size: 0.84rem; }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:focus-visible, .chip:focus-visible, .tabs button:focus-visible, .pm:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- 첫 화면 ---- */
.recent { margin: 0 0 14px; }
.catcards { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.catcards a { display: grid; grid-template-columns: 40px 1fr; grid-template-rows: auto auto auto; column-gap: 12px; height: 100%; padding: 14px 16px; border: 1px solid var(--border); border-radius: 14px; background: var(--card); color: var(--foreground); text-decoration: none; }
.catcards a:hover { border-color: var(--accent); }
.catcards svg { grid-row: 1 / 4; width: 40px; height: 40px; padding: 8px; border-radius: 11px; background: var(--accent-soft); color: var(--accent-text); }
.catcards b { font-size: 1.05rem; line-height: 1.35; }
.catcards span { font-size: 0.84rem; color: var(--muted); line-height: 1.5; }
.catcards em { font-style: normal; font: 600 0.84rem var(--num-font); color: var(--accent-text); margin-top: 4px; }
.catcards.small { grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; margin-top: 12px; }
.catcards.small a { padding: 11px 13px; grid-template-rows: auto auto; }
.catcards.small svg { grid-row: 1 / 3; width: 36px; height: 36px; padding: 7px; }
.catcards.small b { font-size: 0.96rem; }
.catcards.small span { font-size: 0.8rem; }
@media (max-width: 600px) {
  .catcards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .catcards b, .catcards span, .catcards em { overflow-wrap: anywhere; }
  .catcards a { grid-template-columns: minmax(0, 1fr); padding: 12px; }
  .catcards svg { grid-row: auto; width: 34px; height: 34px; padding: 6px; margin-bottom: 6px; }
  .catcards span { font-size: 0.78rem; }
  .catcards em { font-size: 0.78rem; }
  .catcards.small a { grid-template-columns: 1fr; }
  .catcards.small svg { grid-row: auto; }
}
.sec { font-size: 1.1rem; margin: 30px 0 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-block; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--card); color: var(--foreground); font-size: 0.92rem; font-weight: 600; text-decoration: none; }
.chip:hover { border-color: var(--accent); color: var(--accent-text); }

/* ---- 글 ---- */
.prose { max-width: 760px; }
.cat-content, .home-content { margin-top: 36px; }
.prose h1 { font-size: 1.7rem; line-height: 1.35; margin: 0 0 10px; }
.prose h2 { font-size: 1.22rem; line-height: 1.4; margin: 34px 0 10px; }
.prose h3 { font-size: 1.04rem; margin: 22px 0 6px; }
.prose p, .prose li { font-size: 1rem; line-height: 1.8; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 4px; }
.prose .meta { color: var(--muted); font-size: 0.85rem; margin: 0 0 18px; }
.prose .lead { font-size: 1.04rem; color: var(--muted); }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.92rem; margin: 10px 0; background: var(--card); }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
.prose th { background: var(--bg); }
.prose table.num td { font-variant-numeric: tabular-nums; }
.table-scroll { overflow-x: auto; }
.two-tables { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .two-tables { grid-template-columns: 1fr; gap: 0; } }
.prose .tip { padding: 12px 16px; border-left: 4px solid var(--accent); background: var(--card); border-radius: 0 10px 10px 0; }
.prose .formula { font: 600 1rem var(--num-font); padding: 10px 14px; border-radius: 10px; background: var(--card); border: 1px solid var(--border); }
.faq details { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 10px 14px; }
.faq details + details { margin-top: 8px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 0; }

/* ---- 알림 문구 ---- */
.toast { position: fixed; z-index: 100; left: 50%; bottom: max(24px, env(safe-area-inset-bottom)); transform: translate(-50%, 20px); max-width: calc(100vw - 32px); padding: 10px 16px; border-radius: 12px; background: #1a1a2e; color: #fff; font-size: 0.92rem; font-weight: 600; opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
@media (prefers-color-scheme: dark) { .toast { background: #e6e8ef; color: #111318; } }

/* ---- 광고 자리 (assets/ads.js). 변환기 밖, 버튼과 떨어진 곳에만 ---- */
.ad-slot { margin: 40px 0; min-height: 100px; }
.ad-slot .ad-label { display: block; font-size: 0.7rem; color: var(--muted); margin-bottom: 4px; }
.ad-slot.preview { display: grid; place-items: center; min-height: 120px; border: 2px dashed var(--border-strong); border-radius: 12px; color: var(--muted); font-size: 0.85rem; }

@media (prefers-reduced-motion: reduce) { .toast { transition: none; } }