/* ============================================================
   AG Format (2118 / agformat) — Flat / 단색 액센트 리스킨 (2026-07-17)
   기피 디자인 배제(designkit_standard.md): 글래스·블러·그라디언트 워시·
   포맷별 다색·과장식 없음. 솔리드 면 + 1px 헤어라인 + 단색 액센트 1개.
   라이트 기본 + 다크 토글.
   ============================================================ */

:root {
  --accent: #2B57C4;          /* 단색 액센트 1개 */
  --accent-soft: #E7ECF8;     /* 액센트 옅은 배경(활성 칩 등) */
  --primary: var(--accent);   /* 하위 호환(기존 클래스가 참조) */

  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --surface-2: #F7F8FA;       /* 보조 면(보드·칩·통계 배경) */
  --glass-bg: var(--surface); /* .glass = 솔리드 면 */
  --glass-brd: #E4E7EB;       /* 카드 테두리 */
  --glass-line: #E7EAEE;      /* 헤어라인 */
  --card-2: var(--surface-2);
  --code-bg: #FBFBFC;
  --ink: #1A1D21;
  --ink-2: #565D66;
  --ink-3: #98A0AB;
  --radius: 12px;

  /* 트리 구문색(채도 낮춤 — 기능상 최소) */
  --t-string: #3E7A52;
  --t-number: #2B57A0;
  --t-boolean: #6A4E9C;
  --t-null: #B24444;
  --danger: #C0392B;
  --ok: #3E7A52;
}

:root[data-theme="dark"] {
  --accent: #6C8CF5;
  --accent-soft: #232B3D;
  --bg: #14171C;
  --surface: #1E222A;
  --surface-2: #232833;
  --glass-brd: #2E343E;
  --glass-line: #2A3038;
  --code-bg: #12151A;
  --ink: #E7EAEF;
  --ink-2: #A0A8B4;
  --ink-3: #6A7280;
  --t-string: #7FB98A;
  --t-number: #86A9E0;
  --t-boolean: #B7A0DC;
  --t-null: #E08A8A;
  --danger: #E08A8A;
  --ok: #7FB98A;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: 1560px; margin: 0 auto; padding: 0 clamp(18px, 3vw, 44px); }

/* ── 카드(솔리드 면) ── */
.glass {
  background: var(--surface);
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius);
}

/* ── 헤더 ── */
.site-header { padding: 18px 0 6px; }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-badge {
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
  color: #fff; background: var(--accent);
}
.brand-badge i { width: 20px; height: 20px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-main { font-weight: 800; font-size: 1.06rem; letter-spacing: -0.02em; }
.brand-main .accent { color: var(--accent); }
.brand-sub { font-size: 0.64rem; color: var(--ink-3); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.02em; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.site-nav { display: flex; gap: 16px; }
.site-nav a { color: var(--ink-2); font-weight: 600; font-size: 0.9rem; }
.site-nav a:hover { color: var(--accent); text-decoration: none; }
.lang-select {
  font: inherit; font-size: 0.82rem; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--glass-line); border-radius: 8px;
  padding: 6px 8px; cursor: pointer;
}
.theme-btn {
  width: 36px; height: 36px; border-radius: 8px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--glass-line); color: var(--ink-2);
  display: grid; place-items: center;
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); }
.theme-btn i { width: 18px; height: 18px; }
.theme-btn .ic-dark { display: none; }
:root[data-theme="dark"] .theme-btn .ic-light { display: none; }
:root[data-theme="dark"] .theme-btn .ic-dark { display: block; }

/* ── 도구 카드 ── */
/* --pane-h: 에디터/트리 높이를 브라우저 창 높이에 맞춰 조절 */
.tool { padding: 20px; margin: 16px 0 30px; --pane-h: clamp(300px, calc(100vh - 440px), 1080px); }
@media (min-width: 720px) { .tool { padding: 26px; } }

/* 스위치보드 */
.board {
  display: flex; align-items: stretch; gap: 12px; flex-wrap: wrap;
  padding: 14px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--glass-line);
  margin-bottom: 14px;
}
.board-side { flex: 1 1 220px; min-width: 0; }
.board-lbl {
  display: block; font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink-3); margin-bottom: 8px;
}
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.fmt-chip {
  font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 0.82rem;
  padding: 8px 14px; border-radius: 8px; cursor: pointer;
  background: var(--surface); color: var(--ink-2);
  border: 1px solid var(--glass-line); transition: border-color .12s, color .12s, background .12s;
}
.fmt-chip:hover { border-color: var(--ink-3); color: var(--ink); }
.fmt-chip.active {
  color: var(--accent); border-color: var(--accent); background: var(--accent-soft); font-weight: 700;
}
.board-swap {
  align-self: center; flex: 0 0 auto;
  width: 42px; height: 42px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--glass-line); background: var(--surface); color: var(--accent);
  display: grid; place-items: center; transition: transform .2s ease, border-color .12s;
}
.board-swap:hover { transform: rotate(180deg); border-color: var(--accent); }
.board-swap i { width: 20px; height: 20px; }

/* 옵션 바 */
.opts { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; padding: 0 2px; }
.opt { display: flex; align-items: center; gap: 8px; }
.opt-lbl { font-size: 0.8rem; color: var(--ink-2); font-weight: 600; }
.sel-wrap { position: relative; }
.sel {
  font: inherit; font-size: 0.82rem; color: var(--ink);
  background: var(--surface); border: 1px solid var(--glass-line); border-radius: 8px;
  padding: 6px 10px; cursor: pointer;
}
.opt-check { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; font-size: 0.82rem; color: var(--ink-2); font-weight: 600; user-select: none; }
.opt-check input { position: absolute; opacity: 0; width: 0; height: 0; }
.opt-box {
  width: 18px; height: 18px; border-radius: 5px; border: 1px solid var(--glass-line);
  display: grid; place-items: center; background: var(--surface); color: transparent;
}
.opt-box i { width: 13px; height: 13px; }
.opt-check input:checked + .opt-box { background: var(--accent); border-color: var(--accent); color: #fff; }
.csv-opts { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding-left: 14px; border-left: 1px solid var(--glass-line); }

/* 패널 */
.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 720px) { .panes { grid-template-columns: 1fr; } }
.pane {
  display: flex; flex-direction: column; min-width: 0;
  border: 1px solid var(--glass-line); border-radius: 10px; background: var(--code-bg); overflow: hidden;
}
.pane.result { background: var(--surface); }
.pane-bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 12px; border-bottom: 1px solid var(--glass-line); }
.pane-bar-left { display: flex; align-items: center; gap: 8px; }
.pane-tag { font-size: 0.66rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-3); }
.pane-fmt { font-family: 'JetBrains Mono', monospace; font-size: 0.76rem; font-weight: 700; color: var(--accent); padding: 2px 8px; border-radius: 5px; background: var(--accent-soft); }
.pane-actions { display: flex; gap: 6px; }
.mini-btn {
  display: inline-flex; align-items: center; gap: 5px; cursor: pointer;
  font: inherit; font-size: 0.74rem; font-weight: 600; color: var(--ink-2);
  background: transparent; border: 1px solid var(--glass-line); border-radius: 7px; padding: 5px 9px;
}
.mini-btn:hover { color: var(--accent); border-color: var(--accent); }
.mini-btn.done { color: var(--ok); border-color: var(--ok); }
.mini-btn i { width: 13px; height: 13px; }
.code-area {
  width: 100%; border: 0; outline: none; resize: vertical; background: transparent; color: var(--ink);
  font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; line-height: 1.6;
  padding: 13px; height: var(--pane-h, 340px); min-height: 220px; tab-size: 2;
}
.code-area::placeholder { color: var(--ink-3); }
.pane.err-on { border-color: var(--danger); }
.err-banner { display: none; align-items: flex-start; gap: 8px; padding: 10px 13px; background: transparent; color: var(--danger); font-size: 0.78rem; border-top: 1px solid var(--glass-line); }
.err-banner.show { display: flex; }
.err-banner i { width: 15px; height: 15px; flex: 0 0 auto; margin-top: 2px; }

/* ── 뷰 토글(텍스트/트리) ── */
.view-seg { display: inline-flex; border: 1px solid var(--glass-line); border-radius: 7px; overflow: hidden; background: var(--surface); }
.seg-btn { font: inherit; font-size: 0.72rem; font-weight: 600; padding: 5px 11px; cursor: pointer; background: transparent; border: 0; color: var(--ink-2); }
.seg-btn + .seg-btn { border-left: 1px solid var(--glass-line); }
.seg-btn.active { background: var(--accent); color: #fff; }

/* ── 트리 뷰(접기/펼치기) ── */
.tree-wrap { display: flex; flex-direction: column; height: var(--pane-h, 340px); min-height: 220px; }
.tree-tools { display: flex; gap: 6px; padding: 7px 10px; border-bottom: 1px solid var(--glass-line); flex: 0 0 auto; }
.tmini { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; font: inherit; font-size: 0.72rem; font-weight: 600; color: var(--ink-2); background: transparent; border: 1px solid var(--glass-line); border-radius: 6px; padding: 4px 9px; }
.tmini:hover { color: var(--accent); border-color: var(--accent); }
.tmini i { width: 13px; height: 13px; }
.tree-view { flex: 1 1 auto; overflow: auto; padding: 12px 13px; font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; line-height: 1.55; }
.tree-empty { color: var(--ink-3); font-size: 0.85rem; }
.trow { display: flex; align-items: flex-start; gap: 1px; white-space: pre; border-radius: 4px; padding: 1px 4px; }
.branch > .trow { cursor: pointer; }
.branch > .trow:hover { background: var(--surface-2); }
.ttoggle { flex: 0 0 15px; width: 15px; color: var(--ink-3); user-select: none; text-align: center; }
.branch > .trow .ttoggle::before { content: '▾'; font-size: 0.7em; }
.tnode.collapsed > .trow .ttoggle::before { content: '▸'; }
.ttoggle.tnone::before { content: ''; }
.tchildren { margin-left: 15px; border-left: 1px solid var(--glass-line); padding-left: 7px; }
.tclose { padding-left: 19px; color: var(--ink-2); }
.tnode.collapsed > .tchildren { display: none; }
.tnode.collapsed > .tclose { display: none; }
.tellipsis { display: none; color: var(--ink-3); padding: 0 5px; }
.tclose-inline { display: none; }
.tnode.collapsed > .trow .tellipsis { display: inline; }
.tnode.collapsed > .trow .tclose-inline { display: inline; }
.tkey { color: var(--ink); font-weight: 600; }
.tidx { color: var(--ink-3); }
.tcolon { color: var(--ink-3); }
.tbracket { color: var(--ink-2); }
.tcount { color: var(--ink-3); font-size: 0.72em; margin: 0 5px; }
.tval.t-string { color: var(--t-string); }
.tval.t-number { color: var(--t-number); }
.tval.t-boolean { color: var(--t-boolean); font-weight: 600; }
.tval.t-null { color: var(--t-null); font-style: italic; }

/* 상태/통계 */
.status-line { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 14px; }
.status-msg { font-size: 0.82rem; color: var(--ink-2); }
.status-msg.ok { color: var(--ok); }
.status-msg.err { color: var(--danger); }
.stat-row { display: flex; gap: 8px; }
.stat { display: flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--glass-line); }
.stat-k { font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); font-weight: 700; }
.stat-v { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; font-weight: 600; color: var(--ink); }

/* 퀵 예시 */
.quick-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.quick-lbl { font-size: 0.72rem; color: var(--ink-3); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.quick-chip {
  font-family: 'JetBrains Mono', monospace; font-size: 0.74rem; font-weight: 600; cursor: pointer;
  padding: 5px 11px; border-radius: 7px; color: var(--ink-2);
  background: var(--surface-2); border: 1px solid var(--glass-line);
}
.quick-chip:hover { color: var(--accent); border-color: var(--accent); }

.note { display: flex; align-items: center; gap: 7px; font-size: 0.78rem; color: var(--ink-3); margin: 18px 0 0; }
.note i { width: 14px; height: 14px; }

/* 광고 그리드 (§4-2 — 래퍼에 border-radius/overflow 금지) */
.ad-grid { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 100%; max-width: 672px; margin: 20px auto 4px; }
.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; }

/* 신뢰 바 */
.trust-bar { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--glass-line); }
.trust-item { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; color: var(--ink-3); font-weight: 500; }
.trust-item i { width: 14px; height: 14px; color: var(--ink-3); }

/* ── 문서 페이지(about/contact/§12) ── */
.page { padding-bottom: 40px; }
.crumb { margin: 18px 0 12px; max-width: 940px; margin-left: auto; margin-right: auto; }
.crumb a { font-size: 0.85rem; color: var(--ink-2); font-weight: 600; }
.doc { padding: 30px 26px; max-width: 940px; margin-left: auto; margin-right: auto; }
@media (min-width: 720px) { .doc { padding: 40px 44px; } }
.doc-title { margin: 0 0 6px; font-size: 1.7rem; font-weight: 800; letter-spacing: -0.02em; }
.doc-sub { margin: 0 0 22px; color: var(--ink-2); font-size: 1rem; }
.doc p { color: var(--ink-2); margin: 0 0 16px; }
.doc-h2 { margin: 28px 0 14px; font-size: 1.2rem; font-weight: 700; }
.contact-mail a { font-weight: 700; }
.faq-item { padding: 14px 0; border-top: 1px solid var(--glass-line); }
.faq-q { margin: 0 0 6px; font-size: 0.98rem; font-weight: 700; color: var(--ink); }
.faq-a { margin: 0; color: var(--ink-2); font-size: 0.92rem; }

/* §12 확장 페이지 컴포넌트 */
.crumb-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin: 0 auto 12px; max-width: 940px; font-size: 0.82rem; color: var(--ink-3); }
.crumb-nav a { color: var(--ink-2); font-weight: 600; }
.crumb-sep { color: var(--ink-3); margin: 0 6px; }
/* 포맷 인라인 이름 = 중립 볼드(단색, 다색 아님) */
.ft-json, .ft-yaml, .ft-xml, .ft-csv { color: var(--ink); font-weight: 700; }
/* 포맷 배지 = 중립 아웃라인 */
.fmt-badge { display: inline-flex; align-items: center; font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 0.72rem; padding: 3px 9px; border-radius: 6px; border: 1px solid var(--glass-brd); color: var(--ink-2); }
.doc-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.doc-head .doc-title { margin: 0; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin: 22px 0; }
.fcard { display: flex; flex-direction: column; gap: 6px; padding: 18px; border-radius: 10px; border: 1px solid var(--glass-line); background: var(--surface-2); color: var(--ink); transition: border-color .12s; }
.fcard:hover { text-decoration: none; border-color: var(--accent); }
.fcard-title { font-weight: 700; font-size: 1.02rem; }
.fcard-desc { color: var(--ink-2); font-size: 0.86rem; line-height: 1.5; }
.guide-card .fcard-title { font-size: 0.98rem; }
.doc-list { margin: 4px 0 16px; padding-left: 20px; color: var(--ink-2); }
.doc-list li { margin: 5px 0; }
.proscons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 8px 0 16px; }
@media (max-width: 640px) { .proscons { grid-template-columns: 1fr; } }
.pc-col { padding: 14px 16px; border-radius: 10px; border: 1px solid var(--glass-line); background: var(--surface-2); }
.pc-col h3 { margin: 0 0 8px; font-size: 0.9rem; }
.pc-col .doc-list { margin-bottom: 0; }
.pc-pro h3 { color: var(--ok); }
.pc-con h3 { color: var(--danger); }
.code-block { margin: 6px 0 16px; padding: 14px 16px; border-radius: 8px; background: var(--code-bg); border: 1px solid var(--glass-line); overflow-x: auto; }
.code-block code { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; line-height: 1.55; color: var(--ink); white-space: pre; }
.conv-example { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; margin: 8px 0 18px; }
@media (max-width: 640px) { .conv-example { grid-template-columns: 1fr; } .conv-arrow { transform: rotate(90deg); } }
.conv-side { min-width: 0; }
.conv-side-h { display: block; margin-bottom: 6px; }
.conv-side .code-block { margin: 0; }
.conv-arrow { color: var(--ink-3); display: grid; place-items: center; }
.conv-arrow i { width: 22px; height: 22px; }
.conv-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 8px; }
.conv-chip { display: inline-flex; align-items: center; gap: 5px; padding: 6px 12px; border-radius: 7px; border: 1px solid var(--glass-line); background: var(--surface-2); color: var(--ink-2); font-size: 0.82rem; font-weight: 600; }
.conv-chip:hover { text-decoration: none; border-color: var(--accent); color: var(--ink); }
.conv-group { margin: 16px 0; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--glass-line); background: var(--surface-2); }
.conv-group-h { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--ink-3); font-weight: 700; }
.cta-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 9px; background: var(--accent); color: #fff; font-weight: 700; font-size: 0.92rem; margin: 4px 0 8px; }
.cta-btn:hover { text-decoration: none; filter: brightness(1.08); }
.cta-btn i { width: 17px; height: 17px; }
.doc-links { margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--glass-line); font-size: 0.9rem; font-weight: 600; }

/* ── 푸터 ── */
.site-footer { padding: 26px 0 40px; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; font-size: 0.8rem; color: var(--ink-3); }
.site-footer a { color: var(--ink-2); font-weight: 600; }
.footer-divider { color: var(--ink-3); }
.footer-proj { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; color: var(--ink-3); }
.footer-copy { flex-basis: 100%; text-align: center; color: var(--ink-3); margin-top: 4px; }

/* 접근성 */
.sr-title { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }