/* MD HTML 변환기 공통 스타일 (LaTeX 워드 변환기·PDF 워드 변환기와 같은 틀)
   색상은 모두 토큰으로 정의하고 다크 모드에서 다시 지정한다. */
:root {
  color-scheme: light dark;
  --bg: #f5f6fa; --card: #ffffff; --foreground: #1a1a2e; --muted: #5b6075;
  --border: #d6d9e3; --border-strong: #b8bdcf;
  --accent: #2a6f73; --accent-hover: #215a5e; --accent-text: #245f63; --accent-soft: #2a6f731f;
  --go: #15803d; --ok: #15803d; --danger: #b91c1c;
  --warn-bg: #d9770614; --warn-border: #d9770650;
  --paper: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117; --card: #181b24; --foreground: #e6e8ef; --muted: #a0a6b8;
    --border: #2c3140; --border-strong: #3c4254;
    --accent-text: #7fd0cc; --accent-soft: #4fb6b229;
    --ok: #4ade80; --danger: #f87171;
    --warn-bg: #f59e0b14; --warn-border: #f59e0b45;
  }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, "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: 1060px; margin: 0 auto; padding: 24px 20px 0; }

/* ---- 헤더·푸터 ---- */
.site-header { background: var(--card); border-bottom: 1px solid var(--border); }
.site-header .inner { max-width: 1060px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; gap: 6px 20px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.2rem; color: var(--foreground); text-decoration: none; }
.brand svg { width: 30px; height: 30px; flex: none; }
.site-nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.site-nav a { padding: 8px 14px; border-radius: 8px; font-size: 1rem; font-weight: 500; color: var(--foreground); text-decoration: none; }
.site-nav a:hover { background: var(--accent-soft); }
.site-nav a[aria-current="page"] { color: var(--accent-text); font-weight: 600; }
@media (max-width: 480px) {
  .site-nav { margin-left: -8px; width: calc(100% + 8px); gap: 0; }
  .site-nav a { padding: 6px 8px; font-size: 0.92rem; }
}
.site-footer { margin-top: 56px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.82rem; }
.site-footer .inner { max-width: 1060px; margin: 0 auto; padding: 20px 20px 40px; 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); }

/* ---- 첫 화면(파일 선택 전): 큰 제목, 한 문장, 큰 버튼 하나 ---- */
.hero { text-align: center; padding: 56px 16px 64px; border-radius: 18px; }
.hero h1 { font-size: 2.75rem; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 14px; }
.hero .sub { font-size: 1.15rem; line-height: 1.65; color: var(--muted); max-width: 640px; margin: 0 auto 32px; }
.btn.huge { font-size: 1.5rem; padding: 20px 60px; border-radius: 14px; box-shadow: 0 12px 32px rgba(42, 111, 115, 0.33); }
.btn.huge:hover, .btn.huge2:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.hero .alt { margin: 18px 0 0; font-size: 0.95rem; color: var(--muted); }
.hero .status { margin: 10px auto 0; max-width: 560px; font-size: 0.9rem; min-height: 1.4em; }
.hero .trust { display: inline-flex; align-items: center; gap: 7px; margin: 28px 0 0; padding: 7px 14px; border: 1px solid var(--border); border-radius: 999px; background: var(--card); font-size: 0.85rem; color: var(--muted); }
.hero .trust svg { width: 15px; height: 15px; flex: none; }
.hero.over { outline: 3px dashed var(--accent); outline-offset: -10px; background: var(--accent-soft); }
@media (max-width: 600px) {
  .hero { padding: 36px 8px 44px; }
  .hero h1 { font-size: 2rem; }
  .hero .sub { font-size: 1.02rem; margin-bottom: 26px; }
  .btn.huge { width: 100%; max-width: 420px; font-size: 1.25rem; padding: 18px 24px; }
}
.actions { margin-top: 22px; text-align: center; }
.btn { display: inline-block; 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.ghost { background: transparent; color: var(--foreground); border-color: var(--border-strong); }
.btn.green { background: var(--go); border-color: var(--go); }
.btn.small { padding: 6px 12px; font-size: 0.82rem; }
.btn.big { font-size: 1.1rem; padding: 14px 28px; border-radius: 12px; }
.btn.huge2 { font-size: 1.3rem; padding: 16px 56px; border-radius: 13px; box-shadow: 0 10px 26px rgba(42, 111, 115, 0.28); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
.btn:focus-visible, input:focus-visible, summary:focus-visible, .linkbtn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btnrow { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; align-items: center; }
.btnrow.center { justify-content: center; }
.linkbtn { border: 0; background: none; padding: 0 4px; font: inherit; color: var(--accent-text); text-decoration: underline; cursor: pointer; }
@media (max-width: 600px) {
  .tool { padding: 16px; }
  .btn.huge2 { width: 100%; padding: 16px 20px; }
}
.hint { font-size: 0.85rem; color: var(--muted); margin: 10px 0 0; }
.okmsg { color: var(--ok); font-weight: 600; font-size: 0.88rem; margin: 10px 0 0; min-height: 1.4em; text-align: center; }
.okmsg.err { color: var(--danger); }
.warn { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 10px; padding: 8px 12px; font-size: 0.85rem; margin: 0; }
/* ---- 기능 소개 카드 ---- */
.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 40px 0 0; padding: 0; list-style: none; }
.features li { padding: 16px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.features b { display: block; margin-bottom: 4px; }
.features span { display: block; font-size: 0.88rem; line-height: 1.6; color: var(--muted); }

/* ---- 설명 글(가이드·정책·도구 아래 안내) ---- */
.content { margin-top: 44px; }
.prose { max-width: 760px; }
.prose h1 { font-size: 1.6rem; line-height: 1.35; margin: 0 0 8px; }
.prose h2 { font-size: 1.2rem; line-height: 1.4; margin: 36px 0 10px; }
.prose h3 { font-size: 1.02rem; margin: 24px 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 20px; }
.prose .lead { font-size: 1.05rem; color: var(--muted); }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.92rem; margin: 12px 0; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
.prose th { background: var(--card); }
.prose code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; }
.prose pre { margin: 12px 0; padding: 14px 16px; overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; background: var(--card); font-size: 0.9rem; line-height: 1.6; }
.prose pre code { padding: 0; background: none; font-size: inherit; }
.prose .note { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 10px; padding: 10px 14px; font-size: 0.92rem; }
.table-scroll { overflow-x: auto; }
.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; }
.cardlinks { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; padding: 0; margin: 12px 0 0; list-style: none; }
.cardlinks li + li { margin-top: 0; }
.cardlinks a { display: block; height: 100%; padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); color: var(--foreground); text-decoration: none; }
.cardlinks a:hover { border-color: var(--accent); }
.cardlinks b { display: block; margin-bottom: 4px; }
.cardlinks span { display: block; font-size: 0.85rem; line-height: 1.6; color: var(--muted); }

/* ---- 광고 자리: assets/ads.js가 채운다. 설정 전에는 HTML의 hidden으로 숨겨져 있다 ---- */
.ad-slot { margin: 36px 0; min-height: 100px; }
.ad-slot .ad-label { display: block; font-size: 0.7rem; color: var(--muted); margin-bottom: 4px; }
.ad-slot.preview { display: flex; align-items: center; justify-content: center; border: 2px dashed var(--border-strong); border-radius: 10px; color: var(--muted); font-size: 0.85rem; }
.warnings { margin: 16px 0 0; text-align: left; }
.warnings summary { cursor: pointer; font-size: 0.9rem; font-weight: 600; }
.warnings ul { margin: 8px 0 0; padding-left: 1.2em; font-size: 0.85rem; color: var(--muted); max-height: 220px; overflow: auto; }
.warnings li + li { margin-top: 3px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---- 작업 화면: 왼쪽 입력, 오른쪽 미리보기 ---- */
.hero h1 { word-break: keep-all; }
.hero .sub { word-break: keep-all; }
.workspace { max-width: 1760px; margin: 0 auto; padding: 14px 20px 0; }
.ws-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; }
.ws-file { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 12px; min-width: 0; }
.ws-file b { font-size: 1.05rem; overflow-wrap: anywhere; }
.ws-back { padding: 0; font-size: 0.88rem; }
.fmeta { font-size: 0.85rem; color: var(--muted); }
.ws-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.ws-actions .btn.small { padding: 7px 12px; }
#toast { margin: 6px 0 0; min-height: 0; text-align: left; }
#toast:empty { display: none; }
.warnings { margin: 10px 0 0; padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--card); }
.warnings.has-warning { background: var(--warn-bg); border-color: var(--warn-border); }
.warnings summary { cursor: pointer; font-size: 0.88rem; font-weight: 600; }
.warnings ul { margin: 6px 0 2px; padding-left: 1.2em; font-size: 0.85rem; color: var(--muted); max-height: 160px; overflow: auto; overflow-wrap: anywhere; }
.warnings li + li { margin-top: 3px; }
.opt-menu { position: relative; }
.opt-menu summary { list-style: none; }
.opt-menu summary::-webkit-details-marker { display: none; }
.opt-menu[open] summary { background: var(--accent-soft); }
.opt-panel { position: absolute; z-index: 20; top: calc(100% + 6px); left: 0; display: grid; gap: 12px; width: 300px; max-width: calc(100vw - 40px); padding: 14px; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--card); box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16); }
.opt-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 0.9rem; font-weight: 600; }
.opt-row select { flex: 0 1 170px; min-width: 0; padding: 6px 8px; font: inherit; font-size: 0.9rem; font-weight: 400; border: 1px solid var(--border-strong); border-radius: 8px; background: var(--card); color: var(--foreground); }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 0.9rem; line-height: 1.5; cursor: pointer; }
.check input { margin-top: 0.2em; width: 17px; height: 17px; flex: none; accent-color: var(--accent); }
.check small { display: block; color: var(--muted); font-size: 0.8rem; }
.view-tabs { display: none; margin: 10px 0 0; border: 1px solid var(--border-strong); border-radius: 9px; overflow: hidden; }
.view-tabs button { flex: 1; padding: 8px; border: 0; background: var(--card); color: var(--muted); font: inherit; font-size: 0.92rem; cursor: pointer; }
.view-tabs button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }
.ws-panes { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 5fr); gap: 12px; height: calc(100vh - 150px); min-height: 480px; margin-top: 12px; }
.pane { min-width: 0; min-height: 0; overflow: hidden; border: 1px solid var(--border-strong); border-radius: 12px; background: var(--card); }
#src { display: block; width: 100%; height: 100%; padding: 14px 16px; border: 0; outline: 0; resize: none; background: transparent; color: var(--foreground); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "D2Coding", monospace; font-size: 0.92rem; line-height: 1.6; tab-size: 4; }
#preview { display: block; width: 100%; height: 100%; border: 0; background: #f8faf9; }
body.dragging .pane { outline: 3px dashed var(--accent); outline-offset: -6px; }
@media (max-width: 860px) {
  .workspace { padding: 12px 16px 0; }
  .view-tabs { display: flex; }
  .ws-panes { display: block; height: calc(100vh - 210px); }
  .ws-panes .pane { height: 100%; }
  .ws-panes[data-view="edit"] .pane-preview, .ws-panes[data-view="preview"] .pane-edit { display: none; }
  #src { font-size: 16px; } /* 16px 미만이면 iPhone이 입력할 때 화면을 확대해 버린다 */
  .opt-panel { left: auto; right: -80px; }
}