:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --panel: #f8fafc;
  --ai: #b45309;
  --plag: #b91c1c;
  --ok: #15803d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e6e8eb;
    --muted: #9aa3af;
    --border: #262b33;
    --accent: #3b82f6;
    --accent-fg: #0b0d10;
    --panel: #161a20;
    --ai: #f2b352;
    --plag: #f28b82;
    --ok: #4ade80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

/* One global top-loading-bar covers every async operation (initial
   results load, quick check, add-to-corpus, diff fetch, run detect) —
   indeterminate since none of these report real percentage progress,
   just "something is happening" vs. not. Nesting-safe: JS keeps a
   counter and only hides this at zero in-flight operations. */
.global-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  z-index: 200;
  overflow: hidden;
}
.global-progress-fill {
  position: absolute;
  top: 0; bottom: 0;
  width: 40%;
  background: var(--accent);
  border-radius: 2px;
  animation: global-progress-slide 1.1s ease-in-out infinite;
}
@keyframes global-progress-slide {
  0%   { left: -40%; }
  100% { left: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .global-progress-fill { animation: none; left: 0; width: 100%; }
}

/* Small inline spinner for panel-level status text (quick check,
   add-to-corpus, diff modal) — paired with the global bar so there's
   both an at-a-glance "something's loading" signal and a
   where-exactly-in-the-page one. */
.spinner {
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  border: 2px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spinner-spin 0.7s linear infinite;
  vertical-align: -0.15em;
  margin-right: 0.4em;
}
@keyframes spinner-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
}

/* Wide enough for the plagiarism table's 8 columns (name/score/task/
   repo/pr/verdict/matched-with/diff button) to breathe without forcing
   the table-wrap's horizontal scrollbar on typical screens. */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

header h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}
header .sub {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.controls {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  margin-top: 2rem;
}

.period-picker {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.period-picker select {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  min-width: 180px;
}

#run {
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
}
#run:disabled {
  opacity: 0.55;
  cursor: default;
}
#run:not(:disabled):hover { filter: brightness(1.08); }

.ghost-btn {
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: none;
  color: var(--fg);
  cursor: pointer;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent); }

.hidden { display: none !important; }

.ingest-panel {
  margin-top: 1rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.ingest-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.ingest-tab {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
}
.ingest-tab.active { border-color: var(--accent); color: var(--accent); }

.ingest-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 640px;
}
.ingest-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.ingest-form .optional { font-weight: 400; opacity: 0.8; }
.ingest-form input,
.ingest-form textarea {
  font: inherit;
  font-size: 0.88rem;
  color: var(--fg);
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
}
.ingest-form textarea {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  resize: vertical;
}
.ingest-form button[type="submit"] {
  align-self: flex-start;
  font: inherit;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
}
.ingest-form button[type="submit"]:disabled { opacity: 0.55; cursor: default; }
.ingest-form button[type="submit"]:not(:disabled):hover { filter: brightness(1.08); }

.ingest-status {
  margin-top: 1rem;
  font-size: 0.85rem;
}
.ingest-status.error { color: var(--plag); }
.ingest-status.success { color: var(--ok); }
.ingest-status ul {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
}

.quickcheck-scope {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.quickcheck-scope label { flex: 1 1 220px; }

.quickcheck-results {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.quickcheck-block h4 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
}
.quickcheck-summary {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.quickcheck-concerns {
  margin: 0;
  padding-left: 1.1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.quickcheck-note { color: var(--muted); font-size: 0.85rem; margin: 0; }

.quickcheck-matches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.quickcheck-matches li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}
.quickcheck-matches li:last-child { border-bottom: none; }
.quickcheck-match-name { flex: 1 1 auto; min-width: 0; }
.quickcheck-match-score { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 0.85rem; }

.progress {
  margin-top: 2rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.steps {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.steps li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.steps .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--border);
  flex: none;
}
.steps li.active { color: var(--fg); font-weight: 600; }
.steps li.active .dot { background: var(--accent); animation: pulse 1.1s ease-in-out infinite; }
.steps li.done { color: var(--ok); }
.steps li.done .dot { background: var(--ok); animation: none; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.log { margin-top: 0.9rem; }
.log summary { cursor: pointer; color: var(--muted); font-size: 0.85rem; }
.log pre {
  max-height: 220px;
  overflow: auto;
  margin: 0.6rem 0 0;
  padding: 0.7rem 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--muted);
  white-space: pre-wrap;
}

.error {
  margin-top: 2rem;
  padding: 0.9rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--plag);
  color: var(--plag);
  background: color-mix(in srgb, var(--plag) 10%, transparent);
  font-size: 0.9rem;
}

.results { margin-top: 2.5rem; }
.summary {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 1.5rem;
}

.results h2 {
  font-size: 1rem;
  margin: 2rem 0 0.7rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.results h2 .count { color: var(--muted); font-weight: 400; font-size: 0.85rem; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead th {
  text-align: left;
  padding: 0.55rem 0.8rem;
  background: var(--panel);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
}
thead th.sortable {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
thead th.sortable:hover { color: var(--fg); }
thead th.sortable .arrow {
  display: inline-block;
  margin-left: 0.25rem;
  opacity: 0.35;
}
thead th.sortable.active .arrow { opacity: 1; color: var(--accent); }
tbody td {
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }

td.score { font-variant-numeric: tabular-nums; }
td a { color: var(--accent); text-decoration: none; }
td a:hover { text-decoration: underline; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 600;
}
.badge.ai { color: var(--ai); background: color-mix(in srgb, var(--ai) 15%, transparent); }
.badge.flagged { color: var(--plag); background: color-mix(in srgb, var(--plag) 15%, transparent); }
.badge.clean { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }

.pr-state {
  display: inline-block;
  margin-left: 0.3rem;
  padding: 0.05rem 0.4rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
}

.empty { padding: 1rem; color: var(--muted); font-size: 0.88rem; margin: 0; }

.partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.partner-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.partner-list li + li {
  padding-top: 0.35rem;
  border-top: 1px solid var(--border);
}
.partner-name { flex: 1 1 auto; min-width: 0; }
.partner-score {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
}

.diff-link {
  background: none;
  border: 1px solid var(--border);
  color: var(--accent);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
}
.diff-link:hover { border-color: var(--accent); }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, black 55%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  z-index: 100;
}

.modal {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: min(1200px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px color-mix(in srgb, black 35%, transparent);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { margin: 0; font-size: 1rem; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
}
.modal-close:hover { color: var(--fg); }

.modal-body { overflow: auto; padding: 1.25rem; }

.diff-loading, .diff-error { color: var(--muted); font-size: 0.9rem; }
.diff-error { color: var(--plag); }

.diff-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 800px) {
  .diff-panes { grid-template-columns: 1fr; }
}

.diff-pane {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  min-width: 0;
}
.diff-pane-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  font-weight: 600;
}
.diff-sim { color: var(--muted); font-weight: 400; font-variant-numeric: tabular-nums; }

.diff-code {
  margin: 0;
  padding: 0.75rem;
  font: 0.78rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
  max-height: 65vh;
}

.diff-code .highlight-red,
.diff-code .highlight-green {
  border-radius: 3px;
  padding: 0.05em 0;
}
.diff-code .highlight-red {
  background: color-mix(in srgb, var(--plag) 22%, transparent);
}
.diff-code .highlight-green {
  background: color-mix(in srgb, var(--ok) 25%, transparent);
}

.modal-nav {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.15rem 0.55rem;
}
.modal-nav:hover { border-color: var(--accent); color: var(--accent); }

.ghost-btn.small {
  padding: 0.2rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 500;
}

.partner-toggle {
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.2rem 0;
}
.partner-toggle:hover { text-decoration: underline; }

.ai-details-row td { padding-top: 0; padding-bottom: 0.9rem; border-bottom: 1px solid var(--border); }
.ai-details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
}
.concerns-list {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
}
.concern-tag {
  display: inline-block;
  margin-right: 0.4rem;
  padding: 0.03rem 0.4rem;
  border-radius: 4px;
  background: color-mix(in srgb, var(--ai) 18%, transparent);
  color: var(--ai);
  font-weight: 700;
}

.reason-cell { color: var(--muted); font-size: 0.82rem; max-width: 420px; }