:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-hover: #f1f4f9;
  --bg-sel: #e8f0fe;
  --line: #e3e6eb;
  --text: #1f2328;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-text: #ffffff;
  --danger: #dc2626;
  --ok-bg: #e9f8ef;
  --ok-line: #9fdcb5;
  --ro-bg: #fff6e0;
  --ro-line: #f1cf7a;
  --shadow: 0 10px 30px rgba(0, 0, 0, .18);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17191d; --bg-soft: #1e2126; --bg-hover: #252931; --bg-sel: #1e2c47; --line: #2e333b;
    --text: #e6e8eb; --muted: #9aa2ad; --primary: #4f86f7; --danger: #f26b6b;
    --ok-bg: #16301f; --ok-line: #2c6b42; --ro-bg: #33290f; --ro-line: #7a6223;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17191d; --bg-soft: #1e2126; --bg-hover: #252931; --bg-sel: #1e2c47; --line: #2e333b;
  --text: #e6e8eb; --muted: #9aa2ad; --primary: #4f86f7; --danger: #f26b6b;
  --ok-bg: #16301f; --ok-line: #2c6b42; --ro-bg: #33290f; --ro-line: #7a6223;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  display: flex; flex-direction: column; overflow: hidden;
}
a { color: var(--primary); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.grow { flex: 1; }
.warn { color: var(--danger); }

/* ---------- buttons & inputs ---------- */
.btn {
  border: 1px solid var(--line); background: var(--bg); color: var(--text);
  padding: 6px 12px; border-radius: 8px; cursor: pointer; font: inherit; white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--bg-hover); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); font-weight: 600; }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--primary); }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.danger-text { color: var(--danger); }
.btn.link { border: none; background: none; color: var(--primary); padding: 2px 4px; }
.icon-btn { border: none; background: none; color: var(--muted); font-size: 20px; cursor: pointer; padding: 2px 8px; border-radius: 6px; }
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.mini { border: none; background: none; color: var(--muted); cursor: pointer; padding: 0 4px; font-size: 12px; }
.mini:hover { color: var(--danger); }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--primary) 35%, transparent); border-color: var(--primary); }
select { padding-right: 24px; }
.check { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px;
  border-bottom: 1px solid var(--line); background: var(--bg); flex: none;
}
.brand { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.brand b { font-size: 18px; }
.brand small { color: var(--muted); }
.logo { width: 28px; height: 28px; border-radius: 7px; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 800; }
#search { flex: 1; min-width: 0; max-width: 640px; padding: 9px 14px; }
.menu-btn { display: none; }

#banner { padding: 9px 16px; border-bottom: 1px solid var(--line); flex: none; }
#banner.ok { background: var(--ok-bg); border-color: var(--ok-line); }
#banner.ro { background: var(--ro-bg); border-color: var(--ro-line); }

/* ---------- layout ---------- */
.layout { flex: 1; display: flex; min-height: 0; }
#sidebar { width: 230px; flex: none; border-right: 1px solid var(--line); background: var(--bg-soft); overflow-y: auto; padding: 12px 8px 24px; }
#main { flex: 1; min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
#detail[hidden] { display: none; }
#detail { width: 340px; flex: none; border-left: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; background: var(--bg); }

/* ---------- sidebar ---------- */
.side-h { font-size: 12px; font-weight: 700; color: var(--muted); margin: 14px 8px 4px; }
.side-h:first-child { margin-top: 0; }
.side-note { font-size: 12px; color: var(--muted); padding: 0 8px 4px; }
.nav { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px; cursor: pointer; color: var(--text); text-decoration: none; user-select: none; }
.nav:hover { background: var(--bg-hover); }
.nav.on { background: var(--bg-sel); font-weight: 600; }
.nav b { font-weight: 500; color: var(--muted); font-size: 12px; }
.nav .mini { display: none; }
.nav.folder:hover .mini { display: inline; }
.nav.drop-on { outline: 2px dashed var(--primary); background: var(--bg-sel); }
.add-folder { color: var(--muted); justify-content: center; }

/* ---------- main ---------- */
.main-h { display: flex; align-items: baseline; gap: 12px; padding: 12px 16px 8px; flex-wrap: wrap; }
.main-h h1 { font-size: 18px; margin: 0; }
.count { color: var(--muted); }
.busy { color: var(--primary); font-size: 13px; }
.toolbar { display: flex; align-items: center; gap: 8px; padding: 8px 16px; border-top: 1px solid var(--line); flex-wrap: wrap; flex: none; }
.toolbar .sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }
.toolbar.bulk { background: var(--bg-sel); }
.chip { display: inline-flex; align-items: center; gap: 2px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 1px 4px 1px 10px; font-size: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chips select, .tag-input { font-size: 12px; padding: 3px 8px; }
.tag-input { width: 150px; }

.table-wrap { flex: 1; overflow: auto; border-top: 1px solid var(--line); }
table.refs { width: 100%; border-collapse: collapse; table-layout: fixed; min-width: 720px; }
.refs th { position: sticky; top: 0; background: var(--bg-soft); text-align: left; font-weight: 500; color: var(--muted); font-size: 13px; padding: 8px; border-bottom: 1px solid var(--line); z-index: 1; }
.refs th.sortable { cursor: pointer; user-select: none; }
.refs td { padding: 9px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.refs tbody tr { cursor: default; }
.refs tbody tr:hover { background: var(--bg-hover); }
.refs tr.sel { background: var(--bg-sel); }
.refs tr.cur { box-shadow: inset 3px 0 0 var(--primary); }
.c-check { width: 36px; } .c-star { width: 34px; } .c-author { width: 18%; color: var(--muted); }
.c-year { width: 56px; color: var(--muted); } .c-title { font-weight: 600; } .c-journal { width: 15%; color: var(--muted); }
.c-pdf { width: 60px; } .c-memo { width: 52px; text-align: center; }
.star { border: none; background: none; cursor: pointer; font-size: 16px; color: var(--muted); padding: 0; }
.star.on { color: #f5b301; }
.star.big { font-size: 22px; }
.pdf-tag { border: 1px solid var(--primary); color: var(--primary); background: var(--bg); border-radius: 5px; font-size: 11px; font-weight: 700; padding: 2px 6px; cursor: pointer; }
.pdf-tag:hover { background: var(--primary); color: #fff; }
.empty { padding: 48px 24px; text-align: center; color: var(--muted); line-height: 1.9; }

.page { overflow-y: auto; padding: 0 16px 24px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin: 12px 0; }
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card .btn { margin: 4px 4px 4px 0; }
.dup-row { padding: 8px; border-radius: 6px; cursor: pointer; }
.dup-row:hover { background: var(--bg-hover); }
.dup-row + .dup-row { border-top: 1px solid var(--line); }
.row-actions { display: flex; gap: 8px; margin-top: 8px; }

/* ---------- detail ---------- */
.d-head { display: flex; gap: 8px; align-items: flex-start; padding: 14px 12px 8px 16px; }
.d-head h2 { flex: 1; font-size: 15px; margin: 2px 0 0; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); padding: 0 12px; flex: none; }
.tabs button { border: none; background: none; padding: 8px 12px; cursor: pointer; color: var(--muted); font: inherit; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button.on { color: var(--primary); border-color: var(--primary); font-weight: 600; }
.d-body { flex: 1; overflow-y: auto; padding: 8px 16px 16px; }
.f { margin: 10px 0; }
.fl { font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.fv { word-break: break-word; }
.abstract { white-space: pre-wrap; font-size: 13px; }
.cite-preview { background: var(--bg-soft); border-radius: 8px; padding: 8px 10px; font-size: 13px; word-break: break-word; }
.memo { width: 100%; height: 100%; min-height: 300px; resize: none; border: none; padding: 4px 0; outline: none !important; line-height: 1.7; }
.d-foot { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 16px; border-top: 1px solid var(--line); }

/* ---------- modal ---------- */
#modal { position: fixed; inset: 0; background: rgba(0, 0, 0, .35); display: grid; place-items: center; z-index: 50; padding: 16px; }
#modal[hidden] { display: none; }
.dlg { background: var(--bg); border-radius: 14px; box-shadow: var(--shadow); width: 520px; max-width: 100%; max-height: calc(100vh - 32px); overflow-y: auto; padding: 4px 20px 20px; }
.dlg.wide { width: 720px; }
.dlg-h { display: flex; align-items: center; justify-content: space-between; padding: 12px 0 8px; }
.dlg-h h2 { font-size: 17px; margin: 0; }
.dlg .tabs { padding: 0; margin-bottom: 12px; }
.dlg-f { display: flex; justify-content: flex-end; align-items: center; gap: 8px; margin-top: 12px; }
.dlg-f .muted { flex: 1; font-size: 13px; }
.fld { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; font-size: 13px; }
.fld > span { color: var(--muted); font-size: 12px; }
.fld textarea { resize: vertical; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0 12px; }
.dropzone { border: 2px dashed var(--line); border-radius: 12px; padding: 40px 16px; text-align: center; cursor: pointer; line-height: 2; }
.dropzone:hover { border-color: var(--primary); background: var(--bg-sel); }
.style-row { display: flex; gap: 8px; align-items: center; padding: 4px 0; }
.style-row code { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

#drop-hint { position: fixed; inset: 12px; border: 3px dashed var(--primary); border-radius: 16px; background: color-mix(in srgb, var(--primary) 10%, transparent); display: grid; place-items: center; font-size: 20px; font-weight: 700; color: var(--primary); z-index: 60; pointer-events: none; }
#drop-hint[hidden] { display: none; }
#toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); background: #1f2328; color: #fff; padding: 10px 18px; border-radius: 10px; opacity: 0; transition: .2s; pointer-events: none; z-index: 70; max-width: calc(100vw - 32px); }
#toast.on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- narrow screens ---------- */
@media (max-width: 1100px) {
  #detail { position: fixed; right: 0; top: 0; bottom: 0; width: min(380px, 100vw); z-index: 40; box-shadow: var(--shadow); }
}
@media (max-width: 760px) {
  .menu-btn { display: inline-block; }
  .brand small, .brand b { display: none; }
  .topbar { gap: 8px; padding: 8px; }
  #sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 45; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  body.show-sidebar #sidebar { transform: none; }
  .grid2, .grid3 { grid-template-columns: 1fr; }
  .toolbar, .main-h { padding-left: 12px; padding-right: 12px; }
}
.steps { margin: 6px 0 10px; padding-left: 20px; line-height: 1.8; }
.steps li { margin-bottom: 6px; }

/* ---------- Google ドライブ ---------- */
.drive-badge { display: inline-flex; align-items: center; gap: 6px; }
.drive-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex: none; }
.drive-badge.st-ok .dot { background: #16a34a; }
.drive-badge.st-syncing .dot { background: var(--primary); animation: pulse 1s infinite alternate; }
.drive-badge.st-auth, .drive-badge.st-error { border-color: #f1cf7a; background: var(--ro-bg); }
.drive-badge.st-auth .dot, .drive-badge.st-error .dot { background: #d97706; }
@keyframes pulse { to { opacity: .3; } }

/* ---------- アプリ内 PDF ビューア ---------- */
#viewer { position: fixed; inset: 0; z-index: 80; background: #525659; display: flex; flex-direction: column; }
.v-bar { display: flex; align-items: center; gap: 8px; padding: 8px; padding-top: max(8px, env(safe-area-inset-top)); background: var(--bg); border-bottom: 1px solid var(--line); }
.v-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; font-size: 13px; }
.v-pages { flex: 1; overflow: auto; -webkit-overflow-scrolling: touch; padding: 8px; color: #fff; }
.v-page { background: #fff; margin: 0 auto 8px; width: 100%; max-width: 1000px; box-shadow: 0 1px 4px rgba(0,0,0,.4); }
.v-page canvas { display: block; width: 100%; height: 100%; }
.v-loading { padding: 40px; text-align: center; }

/* ---------- スマホ ---------- */
@media (max-width: 760px) {
  .settings-btn, .add-btn .lbl, .drive-badge .lbl { display: none; }
  .drive-badge { padding: 9px 10px; }
  #search { padding: 8px 10px; font-size: 16px; }
  #detail { width: 100vw; }
  .d-head { padding-top: max(14px, env(safe-area-inset-top)); }
  .d-foot { padding-bottom: max(12px, env(safe-area-inset-bottom)); }
  .main-h + .toolbar, .main-h + .toolbar + .toolbar { display: none; }
  .table-wrap { border-top: none; }
  table.refs, .refs tbody { display: block; min-width: 0; }
  .refs thead { display: none; }
  .refs tbody tr { display: flex; flex-wrap: wrap; align-items: baseline; padding: 10px 12px 10px 4px; border-bottom: 1px solid var(--line); }
  .refs td { border: none; padding: 0; width: auto !important; }
  .refs .c-check, .refs .c-memo { display: none; }
  .refs .c-star { width: 32px !important; flex: none; text-align: center; }
  .refs .c-title { flex: 1; min-width: 0; white-space: normal; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
  .refs .c-pdf { padding-left: 8px; }
  .refs .c-author { order: 3; flex-basis: 100%; padding-left: 32px; font-size: 12px; }
  .refs .c-year { order: 4; padding-left: 32px; font-size: 12px; }
  .refs .c-journal { order: 5; padding-left: 6px; font-size: 12px; flex: 1; }
  .dlg { padding: 4px 14px 14px; }
}