:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --sunk: #eef1f6;
  --text: #1f2430;
  --muted: #5b6475;
  --line: #d9dee8;
  --navy: #1d2f5e;
  --navy-soft: #e8eefb;
  --gold: #d4a017;
  --silver: #8a96a8;
  --bronze: #b56f35;
  --good: #1f7a4a;
  --good-soft: #e3f3ea;
  --bad: #a33838;
  --warn: #9a5b00;
  --font: "Noto Sans KR", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161f;
    --surface: #1a2030;
    --sunk: #151a26;
    --text: #e8ecf4;
    --muted: #9ba6ba;
    --line: #2b3346;
    --navy: #9db6ee;
    --navy-soft: #233150;
    --good: #5fcf96;
    --good-soft: #1d3326;
    --bad: #f08a8a;
    --warn: #f0b860;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 var(--font); }
h1, h2, p { margin: 0; }
button, input, select { font: inherit; color: inherit; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.top { display: flex; gap: 14px; align-items: center; max-width: 1400px; margin: 0 auto; padding: 20px 20px 8px; }
.top .mark { width: 52px; height: auto; }
.top h1 { font-size: 1.45rem; font-weight: 900; color: var(--navy); }
.top p { color: var(--muted); font-size: 0.92rem; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 20px; max-width: 1400px; margin: 0 auto; padding: 12px 20px 40px; align-items: start; }
.editor, .preview { min-width: 0; }
.preview { position: sticky; top: 12px; }

.tabs { display: flex; gap: 6px; }
.tabs button { flex: 1; padding: 10px 12px; border: 1px solid var(--line); border-bottom: 0; border-radius: 12px 12px 0 0; background: var(--sunk); color: var(--muted); font-weight: 700; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--surface); color: var(--navy); }
.panel { display: grid; gap: 16px; padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 0 0 14px 14px; }

.period { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-weight: 700; }
.issue-note { color: var(--muted); font-weight: 400; font-size: 0.9rem; }
select, input[type="text"], input[type="search"] { padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); min-width: 0; }

button { padding: 8px 14px; border: 0; border-radius: 8px; background: var(--navy); color: #fff; font-weight: 700; cursor: pointer; }
@media (prefers-color-scheme: dark) { button { color: #12161f; } }
button:disabled { opacity: 0.5; cursor: default; }
button.ghost { background: transparent; color: var(--navy); border: 1px solid var(--line); }
button.danger { color: var(--bad); }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.howto { padding: 12px 14px; border-radius: 10px; background: var(--navy-soft); }
.howto h2 { font-size: 1rem; color: var(--navy); margin-bottom: 6px; }
.howto ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; font-size: 0.92rem; }
.howto p { font-size: 0.92rem; }
.howto a { color: var(--navy); font-weight: 700; }
.howto li button, .file-button { margin-left: 6px; padding: 3px 10px; font-size: 0.85rem; }
.file-button { display: inline-block; border: 1px solid var(--navy); border-radius: 8px; color: var(--navy); font-weight: 700; cursor: pointer; }
.file-button:focus-within { outline: 3px solid var(--gold); outline-offset: 2px; }
.paste { margin-top: 6px; }
.paste summary { cursor: pointer; color: var(--navy); font-weight: 700; }
.paste textarea { display: block; width: 100%; margin: 6px 0; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: inherit; font: inherit; font-size: 0.85rem; }
.bookmarklet { display: inline-block; margin-left: 4px; padding: 3px 10px; border-radius: 999px; background: var(--gold); color: #1f2430 !important; text-decoration: none; cursor: grab; }

.status { font-size: 0.9rem; min-height: 0; }
.status:empty { display: none; }
.status.error { color: var(--bad); }
.status.success { color: var(--good); }
.note { margin-top: 6px; color: var(--muted); font-size: 0.85rem; }
.note:empty { display: none; }

.list-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.list-head h2, .search h2 { font-size: 1.05rem; }
.count { color: var(--muted); font-weight: 400; font-size: 0.9rem; margin-left: 4px; }
.list-tools { display: flex; gap: 6px; }
.empty { color: var(--muted); padding: 14px; border: 1px dashed var(--line); border-radius: 10px; }

.book-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.book-row { display: grid; grid-template-columns: 34px 46px minmax(0, 1fr) auto; gap: 10px; align-items: start; padding: 10px; border: 1px solid var(--line); border-radius: 10px; }
.rank { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--navy); color: #fff; font-weight: 900; }
@media (prefers-color-scheme: dark) { .rank { color: #12161f; } }
.rank-1 { background: var(--gold); color: #fff; }
.rank-2 { background: var(--silver); color: #fff; }
.rank-3 { background: var(--bronze); color: #fff; }
.thumb { width: 46px; height: 66px; object-fit: cover; border-radius: 4px; background: var(--sunk); }
.row-body { display: grid; gap: 6px; min-width: 0; }
.title-input { width: 100%; font-weight: 700; }
.row-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.row-meta input { width: 100%; font-size: 0.88rem; }
.row-info { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 0.82rem; }
.full-title { color: var(--muted); }
.chip { white-space: pre-wrap; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); font-weight: 700; }
.chip-owned { background: var(--good-soft); border-color: var(--good); color: var(--good); }
.chip-none { color: var(--muted); }
.chip-error { color: var(--bad); border-color: var(--bad); }
.chip-checking { color: var(--warn); }
.row-tools { display: grid; gap: 4px; }
button.icon { padding: 2px 8px; background: transparent; color: var(--navy); border: 1px solid var(--line); font-size: 0.8rem; }

.search { display: grid; gap: 8px; padding-top: 14px; border-top: 1px solid var(--line); }
.search-row { display: flex; gap: 8px; }
.search-row input { flex: 1; }
.results { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 360px; overflow: auto; }
.result { display: grid; grid-template-columns: 46px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 6px; border-bottom: 1px solid var(--line); }
.result-title { font-weight: 700; font-size: 0.92rem; }
.result-meta { color: var(--muted); font-size: 0.82rem; }

.preview-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.preview-head h2 { font-size: 1.05rem; }
.downloads { display: flex; gap: 6px; flex-wrap: wrap; }
.paper { background: #fff; border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 10px 30px rgb(24 39 65 / 12%); overflow: hidden; }
.paper canvas { display: block; width: 100%; height: auto; }

@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 12px 16px 32px; }
  .top { padding: 16px 16px 4px; }
  .preview { position: static; }
}
@media (max-width: 480px) {
  .book-row { grid-template-columns: 30px minmax(0, 1fr) auto; }
  .book-row .thumb { display: none; }
  .row-meta { grid-template-columns: minmax(0, 1fr); }
}