/* TXT Reader 공개 사이트 공통 스타일.
   링크는 전부 상대 경로 — 도메인이 바뀌어도 이 파일들은 손대지 않는다. */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --line: #e3e3e3;
  --card: #f7f7f8;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --warn-bg: #fff8e6;
  --warn-line: #f0d090;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e8e8ea;
    --muted: #a0a0a8;
    --line: #2c2f36;
    --card: #1e2127;
    --accent: #5b8cff;
    --accent-fg: #0d0f12;
    --warn-bg: #2a2415;
    --warn-line: #5c4d20;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic',
    'Apple SD Gothic Neo', system-ui, sans-serif;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
header.site .wrap { display: flex; align-items: center; gap: 12px; }
header.site .name { font-weight: 700; font-size: 1.05rem; }
header.site nav { margin-left: auto; display: flex; gap: 16px; }
header.site nav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
header.site nav a:hover { color: var(--fg); }

.hero { padding: 56px 0 40px; text-align: center; }
.hero h1 { font-size: 2.1rem; margin: 0 0 12px; letter-spacing: -.02em; }
.hero p.lead { color: var(--muted); font-size: 1.05rem; margin: 0 auto 32px; max-width: 30em; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--accent-fg);
  padding: 14px 26px; border-radius: 10px;
  text-decoration: none; font-weight: 600; font-size: 1rem;
  border: none;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary {
  background: transparent; color: var(--fg);
  border: 1px solid var(--line);
}
.btn[aria-disabled='true'] { opacity: .45; pointer-events: none; }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.sub { color: var(--muted); font-size: .85rem; margin-top: 10px; }

.features { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 48px 0; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.feature h3 { margin: 0 0 6px; font-size: 1rem; }
.feature p { margin: 0; color: var(--muted); font-size: .9rem; }

.note {
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  border-radius: 10px; padding: 16px 18px; margin: 32px 0;
  font-size: .92rem;
}
.note strong { display: block; margin-bottom: 6px; }
.note ol { margin: 8px 0 0; padding-left: 1.3em; }

main.doc { padding: 40px 0 64px; }
main.doc h1 { font-size: 1.7rem; margin: 0 0 4px; }
main.doc .updated { color: var(--muted); font-size: .85rem; margin-bottom: 32px; }
main.doc h2 { font-size: 1.15rem; margin: 36px 0 10px; padding-top: 12px; border-top: 1px solid var(--line); }
main.doc h3 { font-size: 1rem; margin: 22px 0 6px; }
main.doc p, main.doc li { font-size: .95rem; }
main.doc ul { padding-left: 1.3em; }

.tablewrap { overflow-x: auto; margin: 14px 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; min-width: 460px; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: var(--card); font-weight: 600; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 28px 0 44px; margin-top: 40px;
  color: var(--muted); font-size: .85rem;
}
footer.site .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer.site a { color: var(--muted); }
footer.site .spacer { margin-left: auto; }
a { color: var(--accent); }
code { background: var(--card); padding: 1px 5px; border-radius: 4px; font-size: .88em; }