/* BookFinder — 深色玻璃风格，左侧固定导航 */
:root {
  color-scheme: dark;
  --bg: #070b14;
  --bg-2: #0b1220;
  --panel: rgba(255, 255, 255, .045);
  --panel-strong: rgba(255, 255, 255, .075);
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(255, 255, 255, .16);
  --text: #e8eefb;
  --muted: #93a4c2;
  --dim: #6f809e;
  --accent: #4c8dff;
  --accent-2: #6ee7b7;
  --ok: #31d07a;
  --warn: #f2b544;
  --bad: #ff6b6b;
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 12% -10%, #14233f 0%, transparent 60%),
    radial-gradient(900px 600px at 95% 0%, #10203a 0%, transparent 55%),
    linear-gradient(180deg, #070b14 0%, #060911 100%);
  color: var(--text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app { display: flex; min-height: 100vh; }

/* ---------------- sidebar ---------------- */
.sidebar {
  width: 232px;
  flex: 0 0 232px;
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, .022);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: center; gap: 11px; padding: 2px 6px; }
.logo {
  width: 38px; height: 38px; flex: 0 0 38px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: linear-gradient(140deg, #2c56a8, #4c8dff 60%, #6ee7b7);
  color: #06101f;
  box-shadow: 0 8px 22px rgba(76, 141, 255, .35);
}
.logo svg { width: 21px; height: 21px; }
.brand h1 { margin: 0; font-size: 16px; letter-spacing: -.01em; }
.brand p { margin: 1px 0 0; font-size: 11.5px; color: var(--dim); letter-spacing: .04em; }

.nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  transition: background .16s, color .16s, border-color .16s;
}
.nav-item svg { width: 17px; height: 17px; opacity: .85; }
.nav-item:hover { background: var(--panel); color: var(--text); }
.nav-item.active {
  background: linear-gradient(90deg, rgba(76, 141, 255, .18), rgba(76, 141, 255, .04));
  border-color: rgba(76, 141, 255, .3);
  color: #dceaff;
}

.side-foot { margin-top: auto; padding: 10px 8px 0; border-top: 1px solid var(--line); }
.status { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 3px rgba(49, 208, 122, .16);
  animation: pulse 2.4s infinite;
}
@keyframes pulse { 50% { opacity: .45; } }
.ver { margin-top: 6px; font-size: 11px; color: var(--dim); }

/* ---------------- main ---------------- */
.main { flex: 1; min-width: 0; padding: 26px 32px 60px; }
.view { display: none; animation: fade .22s ease; }
.view.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } }

.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 20px; margin-bottom: 22px;
}
.page-head h2 { margin: 0; font-size: 22px; letter-spacing: -.02em; }
.page-head p { margin: 6px 0 0; color: var(--muted); font-size: 13px; max-width: 70ch; }
.page-head code, .tip code {
  background: rgba(255, 255, 255, .08); padding: 1px 6px; border-radius: 5px;
  font-family: ui-monospace, Menlo, monospace; font-size: 12px;
}
.head-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.stat {
  min-width: 92px; padding: 9px 13px; border-radius: 11px;
  background: var(--panel); border: 1px solid var(--line);
}
.stat b { display: block; font-size: 17px; font-variant-numeric: tabular-nums; }
.stat span { font-size: 11.5px; color: var(--dim); }
.head-actions { display: flex; gap: 8px; }

/* ---------------- search ---------------- */
.search-card {
  padding: 18px;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.search-row { display: flex; gap: 10px; }
.search-row input {
  flex: 1; min-width: 0;
  padding: 13px 15px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, .28);
  color: var(--text);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
  outline: none;
  transition: border-color .16s, box-shadow .16s;
}
.search-row input:focus { border-color: rgba(76, 141, 255, .6); box-shadow: 0 0 0 3px rgba(76, 141, 255, .14); }
.search-row input::placeholder { color: var(--dim); }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 11px 16px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  background: var(--panel-strong);
  color: var(--text);
  font-size: 13.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .16s, border-color .16s, transform .1s;
}
.btn svg { width: 15px; height: 15px; }
.btn:hover { background: rgba(255, 255, 255, .12); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary {
  background: linear-gradient(135deg, #3b7bff, #4c8dff 55%, #57c7ff);
  border-color: transparent;
  color: #06101f;
  font-weight: 600;
  box-shadow: 0 10px 26px rgba(60, 130, 255, .3);
}
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--panel); color: var(--text); }
.btn.tiny { padding: 6px 10px; font-size: 12px; border-radius: 8px; }

.hints { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-top: 12px; font-size: 12px; color: var(--dim); }
.chip {
  padding: 3px 9px; border-radius: 20px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .04);
  color: var(--muted); font-size: 12px; cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.chip:hover { color: #cfe0ff; border-color: rgba(76, 141, 255, .45); }

/* ---------------- results ---------------- */
.result-area { margin-top: 22px; display: flex; flex-direction: column; gap: 16px; }

.book-card {
  display: flex; gap: 18px;
  padding: 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(76, 141, 255, .1), rgba(255, 255, 255, .03));
  border: 1px solid rgba(76, 141, 255, .2);
}
.book-cover {
  width: 78px; height: 112px; flex: 0 0 78px;
  border-radius: 8px; object-fit: cover;
  background: rgba(255, 255, 255, .07);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .45);
}
.book-cover.empty { display: grid; place-items: center; font-size: 26px; }
.book-meta h3 { margin: 0 0 6px; font-size: 17px; line-height: 1.35; }
.book-meta .sub { color: var(--muted); font-size: 13px; }
.book-meta .facts { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.fact {
  font-size: 11.5px; color: var(--muted);
  padding: 3px 9px; border-radius: 7px;
  background: rgba(255, 255, 255, .06); border: 1px solid var(--line);
}
.fact.isbn { color: #bcd4ff; font-variant-numeric: tabular-nums; }

.source-block {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}
.source-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .025);
}
.source-head .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--dim); }
.source-head .dot.hit { background: var(--ok); box-shadow: 0 0 0 3px rgba(49, 208, 122, .14); }
.source-head .dot.err { background: var(--bad); }
.source-head strong { font-size: 13.5px; font-weight: 600; }
.source-head .tag {
  font-size: 11px; color: var(--dim);
  padding: 1px 7px; border-radius: 5px; background: rgba(255, 255, 255, .06);
}
.source-head .spacer { flex: 1; }
.source-head .errmsg { font-size: 11.5px; color: var(--warn); }

.hit {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 16px;
  border-top: 1px solid rgba(255, 255, 255, .05);
}
.hit:first-child { border-top: 0; }
.hit:hover { background: rgba(76, 141, 255, .06); }
.hit-title { flex: 1; min-width: 0; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fmt {
  font-size: 10.5px; font-weight: 700; letter-spacing: .04em;
  padding: 2px 6px; border-radius: 5px;
  background: rgba(255, 255, 255, .08); color: var(--muted);
}
.fmt.pdf { background: rgba(255, 107, 107, .16); color: #ff9d9d; }
.size { font-size: 11.5px; color: var(--dim); font-variant-numeric: tabular-nums; min-width: 62px; text-align: right; }

.empty {
  padding: 44px 20px; text-align: center; color: var(--dim);
  border: 1px dashed var(--line); border-radius: 14px;
}
.empty b { color: var(--muted); display: block; margin-bottom: 6px; font-size: 14px; }
.empty.small { padding: 18px; }
.empty.small b { font-size: 13px; }

.loading { display: flex; align-items: center; gap: 10px; color: var(--muted); padding: 16px; }
.spinner {
  width: 15px; height: 15px; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .16); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- tables ---------------- */
.table-wrap {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: auto;
}
.grid { width: 100%; border-collapse: collapse; font-size: 13px; }
.grid th {
  text-align: left; padding: 11px 14px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--dim);
  background: rgba(255, 255, 255, .03);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.grid td { padding: 11px 14px; border-top: 1px solid rgba(255, 255, 255, .05); vertical-align: middle; }
.grid tbody tr:hover { background: rgba(76, 141, 255, .05); }
.grid .mono { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: #b9c9e4; }
.grid .ellipsis { max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.grid .muted { color: var(--dim); }
.grid .actions { display: flex; gap: 6px; }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 6px;
  font-size: 11px; border: 1px solid transparent;
}
.badge.ok { background: rgba(49, 208, 122, .14); color: #7fe0a9; border-color: rgba(49, 208, 122, .3); }
.badge.no { background: rgba(255, 255, 255, .06); color: var(--dim); border-color: var(--line); }
.badge.err { background: rgba(242, 181, 68, .14); color: #f2c66d; border-color: rgba(242, 181, 68, .3); }
.badge.kind { background: rgba(76, 141, 255, .14); color: #a9c6ff; border-color: rgba(76, 141, 255, .3); }

.switch { position: relative; display: inline-block; width: 34px; height: 19px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span {
  position: absolute; inset: 0; cursor: pointer; border-radius: 20px;
  background: rgba(255, 255, 255, .13); transition: background .18s;
}
.switch span::before {
  content: ""; position: absolute; width: 13px; height: 13px; left: 3px; top: 3px;
  border-radius: 50%; background: #cfdbef; transition: transform .18s;
}
.switch input:checked + span { background: rgba(49, 208, 122, .65); }
.switch input:checked + span::before { transform: translateX(15px); background: #ffffff; }

.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.toolbar input {
  flex: 1; max-width: 420px;
  padding: 10px 13px; border-radius: 10px;
  border: 1px solid var(--line-strong); background: rgba(0, 0, 0, .26);
  color: var(--text); outline: none; font-size: 13px;
}
.toolbar input:focus { border-color: rgba(76, 141, 255, .55); }
.count { font-size: 12px; color: var(--dim); }

.pager { display: flex; align-items: center; gap: 12px; justify-content: center; margin-top: 16px; font-size: 12.5px; color: var(--muted); }

.tip { margin-top: 14px; font-size: 12px; color: var(--dim); line-height: 1.7; }

/* ---------------- modal ---------------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center;
  background: rgba(3, 7, 14, .72);
  backdrop-filter: blur(4px);
}
.modal {
  width: min(560px, 94vw);
  border-radius: 16px;
  background: #101a2b;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; font-size: 15px; }
.icon-btn { background: transparent; border: 0; color: var(--dim); cursor: pointer; font-size: 15px; }
.icon-btn:hover { color: var(--text); }
.modal-body { padding: 18px 20px; display: flex; flex-direction: column; gap: 13px; }
.modal-body label { display: flex; flex-direction: column; gap: 6px; font-size: 12.5px; color: var(--muted); }
.modal-body input, .modal-body select, .modal-body textarea {
  padding: 10px 12px; border-radius: 9px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, .3); color: var(--text);
  font-size: 13px; font-family: inherit; outline: none;
}
.modal-body textarea { font-family: ui-monospace, Menlo, monospace; font-size: 12px; resize: vertical; }
.modal-body input:focus, .modal-body select:focus, .modal-body textarea:focus { border-color: rgba(76, 141, 255, .55); }
.row-check { flex-direction: row !important; align-items: center; gap: 8px !important; }
.row-check input { width: auto; }
.modal-foot { display: flex; justify-content: flex-end; gap: 9px; padding: 14px 20px; border-top: 1px solid var(--line); }

/* ---------------- toast ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  padding: 10px 18px; border-radius: 10px;
  background: #16233a; border: 1px solid var(--line-strong);
  color: var(--text); font-size: 13px;
  box-shadow: var(--shadow); z-index: 60;
}
.toast.err { border-color: rgba(255, 107, 107, .4); color: #ffb3b3; }

@media (max-width: 900px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; flex: none; height: auto; position: static; flex-direction: row; align-items: center; gap: 16px; padding: 12px 14px; }
  .nav { flex-direction: row; flex: 1; }
  .side-foot { display: none; }
  .main { padding: 18px 16px 50px; }
  .page-head { flex-direction: column; }
  .search-row { flex-direction: column; }
}