:root {
  --bg: #0f1419;
  --panel: #161c24;
  --panel-2: #1e2630;
  --border: #2a3340;
  --text: #e6edf3;
  --muted: #8b949e;
  --primary: #3b82f6;
  --primary-h: #2563eb;
  --danger: #ef4444;
  --ok: #22c55e;
  --warn: #f59e0b;
  --code-bg: #0b1018;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { margin: 0; font-size: 18px; font-weight: 600; }
.logo {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  font-weight: 700;
  font-size: 13px;
}
.topbar-right { display: flex; gap: 8px; align-items: center; }
.proj-input { width: 240px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 18px;
}
.icon-btn:hover { background: var(--border); text-decoration: none; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 12px 20px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.tab {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-bottom: none;
  padding: 10px 18px;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  font-size: 14px;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  background: var(--panel);
  border-color: var(--border);
}

main {
  padding: 16px 20px 40px;
  max-width: 1400px;
  margin: 0 auto;
}
.settings-main { max-width: 1100px; margin: 0 auto; padding: 20px; }

.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.card h3 { margin: 0 0 12px; font-size: 16px; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
}

label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
}
label.inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 12px;
  margin-bottom: 0;
  color: var(--text);
}

input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  margin-top: 4px;
}
input[type="checkbox"], input[type="radio"] { width: auto; margin: 0; }
input[type="file"] { padding: 6px; background: var(--panel-2); }
textarea { resize: vertical; font-family: ui-monospace, Menlo, Consolas, monospace; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}
.btn:hover { background: var(--border); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-h); }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 10px 0;
  flex-wrap: wrap;
}
.row .grow, .grow { flex: 1; }

.muted { color: var(--muted); }
.small { font-size: 12px; }

progress {
  width: 100%; height: 6px;
  appearance: none; -webkit-appearance: none;
  border: none; background: var(--panel-2);
  border-radius: 3px;
  overflow: hidden;
}
progress::-webkit-progress-bar { background: var(--panel-2); }
progress::-webkit-progress-value { background: var(--primary); }
progress::-moz-progress-bar { background: var(--primary); }

.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }

.code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: 6px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 500px;
  overflow: auto;
  margin: 0;
}

.ref-tabs { display: flex; gap: 4px; margin-bottom: 8px; }
.ref-tab {
  background: transparent; color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
.ref-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.section-list { display: flex; flex-direction: column; gap: 10px; }
.section-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
}
.section-head {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 8px;
}
.section-head input { flex: 1; background: transparent; border: none; font-size: 15px; font-weight: 600; padding: 4px; }
.section-head input:focus { background: var(--bg); border: 1px solid var(--primary); }
.section-meta { color: var(--muted); font-size: 11px; }
.section-actions { display: flex; gap: 6px; }
.section-body textarea {
  font-size: 12px;
  min-height: 200px;
}
.section-item.collapsed .section-body { display: none; }

.merge-list { margin: 10px 0; display: flex; flex-direction: column; gap: 6px; }
.merge-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
}
.merge-item .fname { flex: 1; font-family: ui-monospace, Menlo, Consolas, monospace; }

.provider-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 12px; }
.provider {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
}
.provider-summary {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 12px;
}
.prov-summary-title {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.prov-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  border-top: 1px dashed var(--border);
}
.prov-row:first-of-type { border-top: none; }
.p-saved-badge, .p-tested-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--border);
  color: var(--muted);
}
.p-saved-badge.done, .p-tested-badge.done {
  background: var(--ok);
  color: #fff;
}
.p-tested-badge.error {
  background: var(--danger);
  color: #fff;
}

.proof-results { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.proof-block {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
}
.proof-block h4 { margin: 0 0 8px; font-size: 14px; color: var(--primary); }
.proof-suggestion {
  border-left: 3px solid var(--warn);
  padding: 8px 10px;
  margin: 6px 0;
  background: var(--bg);
  border-radius: 0 4px 4px 0;
}
.proof-suggestion .loc { font-size: 11px; color: var(--muted); margin-bottom: 4px; }
.proof-suggestion .issue { color: var(--warn); margin-bottom: 4px; font-size: 13px; }
.proof-suggestion .sugg { color: var(--text); margin-bottom: 6px; font-size: 13px; }
.proof-suggestion pre {
  background: var(--code-bg);
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 11px;
  max-height: 200px;
  overflow: auto;
  margin: 6px 0;
}
.proof-suggestion .actions { display: flex; gap: 6px; }

/* ----- image area ----- */
.img-area {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}
.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 8px;
}
.img-tile {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.img-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.img-thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.img-tile .img-cap {
  font-size: 11px;
  padding: 4px 6px;
  margin: 0;
  background: var(--panel-2);
}
.img-tile .row { margin: 2px 0; gap: 4px; flex-wrap: wrap; }
.img-tile .btn { padding: 3px 6px; font-size: 11px; }

/* ----- modal ----- */
.modal {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  width: min(620px, 92vw);
  max-height: 90vh;
  overflow: auto;
}
.modal-card h3 { margin-top: 0; }
.img-preview {
  margin: 12px 0;
  background: #000;
  border-radius: 6px;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.img-preview img {
  max-width: 100%;
  max-height: 360px;
  object-fit: contain;
}

/* ----- pdf translate chunk list ----- */
.chunk-list { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.chunk-row {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
}
.chunk-row.chunk-running { border-color: var(--primary); }
.chunk-row.chunk-done    { border-color: var(--ok); }
.chunk-row.chunk-error   { border-color: var(--danger); }
.chunk-row.chunk-skipped { opacity: .55; }
.chunk-head {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.chunk-head .ch-title {
  flex: 1; min-width: 240px;
  background: transparent; border: none; padding: 4px;
  font-size: 14px;
}
.chunk-head .ch-title:focus { background: var(--bg); border: 1px solid var(--primary); }
.chunk-head .btn { padding: 3px 8px; font-size: 11px; }
.chunk-body { margin-top: 6px; }
.chunk-body .code { max-height: 360px; }
.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--border);
  color: var(--muted);
  min-width: 50px;
  text-align: center;
}
.badge.running { background: var(--primary); color: #fff; }
.badge.done    { background: var(--ok); color: #fff; }
.badge.error   { background: var(--danger); color: #fff; }
.badge.skipped { background: var(--panel); }

.toast {
  position: fixed;
  bottom: 20px; right: 20px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 16px;
  color: var(--text);
  font-size: 13px;
  opacity: 0;
  transform: translateY(20px);
  transition: all .2s ease;
  pointer-events: none;
  max-width: 400px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--danger); }

details > summary { cursor: pointer; color: var(--muted); margin: 8px 0; }
details[open] > summary { color: var(--text); }