/* ── Tokens ── */
:root {
  --bg: #ffffff;
  --ink: #0a0a0a;
  --muted: #7a7a7a;
  --line: #e4e4e4;
  --hairline: #f0f0f0;
  --panel: #fafafa;
  --warn: #c94a2b;
  --ok: #2b7a4a;
  --font: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, monospace;
  --row-pad: 10px 12px;
  --accent: #0a0a0a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 14px; line-height: 1.55; }

/* ── Layout ── */
.app-shell { max-width: 1280px; margin: 0 auto; padding: 0 24px 80px; }

.btn {
  font-family: var(--font); font-size: 12px; padding: 6px 12px;
  background: var(--bg); color: var(--ink); border: 1px solid var(--ink);
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--bg); border: none; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-sm { padding: 4px 9px; font-size: 11px; }

/* ── Empty State ── */
.empty-state { padding-top: 80px; max-width: 540px; margin: 0 auto; text-align: center; }
.empty-h1 { font-size: 56px; font-weight: 700; letter-spacing: -1.6px; margin: 0; line-height: 1; }
.empty-hint { font-size: 15px; color: var(--muted); margin-top: 14px; line-height: 1.55; }
.empty-form { margin-top: 32px; display: flex; gap: 8px; }
.empty-form input {
  flex: 1; font-family: var(--font); font-size: 14px;
  padding: 10px 12px; border: 1px solid var(--line); outline: none;
}
.empty-form input:focus { border-color: var(--ink); }
.inline-error {
  margin-top: 24px; padding: 10px 14px;
  background: #fef3f1; border: 1px solid var(--warn);
  color: var(--warn); font-size: 13px; font-family: var(--mono); text-align: left;
}

/* ── Loading (full track download) ── */
.loading-state { padding-top: 120px; text-align: center; color: var(--muted); font-family: var(--mono); font-size: 14px; }
.loading-label { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 14px; }
.loading-progress { font-size: 16px; color: var(--ink); font-variant-numeric: tabular-nums; }
.loading-track-track { height: 4px; background: var(--hairline); margin: 18px auto 0; max-width: 420px; }
.loading-track-fill { height: 100%; background: var(--ink); transition: width 200ms ease; }

/* ── Controls Row ── */
.stat-row {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px;
  padding: 24px 0 18px; border-bottom: 1px solid var(--ink); margin-bottom: 24px;
  align-items: end;
}
.stat-h1 { font-size: 40px; font-weight: 700; letter-spacing: -1.2px; margin: 0; line-height: 1; }
.stat-block-label {
  font-size: 9px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--muted); margin-bottom: 4px;
}
.stat-block-value {
  font-size: 28px; font-weight: 500; line-height: 1;
  font-variant-numeric: tabular-nums; letter-spacing: -0.8px;
}

/* ── Knobs (minArtistPlays / minTrackPlays / Find) ── */
.knobs-row { display: flex; gap: 20px; align-items: flex-end; margin-bottom: 24px; flex-wrap: wrap; }
.knob { display: flex; flex-direction: column; gap: 4px; }
.knob-label { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); }
.knob input {
  font-family: var(--mono); font-size: 13px; width: 90px;
  padding: 6px 8px; border: 1px solid var(--line); outline: none; text-align: right;
}
.knob input:focus { border-color: var(--ink); }
.knob-seeds { margin-left: auto; text-align: right; }
.knob-seeds .knob-label { text-align: right; }
.knob-seeds-value { font-family: var(--mono); font-size: 22px; font-variant-numeric: tabular-nums; }

/* ── 3-Column Editor Grid ── */
.editor-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px;
  margin-bottom: 28px; align-items: start;
}
.editor-col { display: flex; flex-direction: column; min-height: 0; }
.editor-col-head {
  font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--ink); font-weight: 600; margin-bottom: 12px;
  display: flex; justify-content: space-between; align-items: baseline;
}
.editor-col-body { border: 1px solid var(--line); overflow-y: auto; max-height: 520px; }
/* The Tags column runs full height (no scroll cap) and has no hidden-chips block. */
.tags-col .editor-col-body { max-height: 520px; }
.col-empty { padding: 20px; text-align: center; color: var(--muted); font-size: 12px; }

.artist-row, .ignored-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--row-pad); border-bottom: 1px solid var(--hairline);
  cursor: pointer; font-size: 13px;
}
.artist-row:hover, .ignored-row:hover { background: var(--panel); }
.artist-name { font-weight: 500; }
.ignored-row .artist-name { text-decoration: line-through; text-decoration-color: var(--muted); color: var(--muted); }
.artist-plays-num {
  color: var(--muted); font-family: var(--mono); font-size: 11px;
  font-variant-numeric: tabular-nums; margin-left: 8px;
}

/* ── Tags Column (chips) ── */
.tags-hint { padding: 20px; text-align: center; color: var(--muted); font-size: 12px; font-style: italic; }
.tag-chip-list { display: flex; flex-wrap: wrap; gap: 4px; padding: 12px; }
.tag-chip {
  font-size: 11px; padding: 5px 9px; border: 1px solid var(--line);
  background: var(--bg); color: var(--muted); font-family: var(--font);
  cursor: pointer;
}
.tag-chip:hover { border-color: var(--ink); color: var(--ink); }
.tag-chip.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* ── Gathering ── */
.gathering-panel { border: 1px solid var(--ink); padding: 24px 28px; margin-bottom: 36px; }
.gathering-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }
.gathering-counter { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.gathering-eta { font-family: var(--mono); font-size: 12px; color: var(--ink); margin-bottom: 10px; }
.progress-track { height: 4px; background: var(--hairline); margin-bottom: 18px; position: relative; }
.progress-fill { height: 100%; background: var(--ink); transition: width 200ms ease; }
.gathering-log {
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  line-height: 1.7; max-height: 220px; overflow-y: auto;
}
.gathering-log-summary { color: var(--ink); font-weight: 600; margin-bottom: 8px; }
.gathering-log-row { display: grid; grid-template-columns: 1.5rem minmax(12rem, 1fr) 6rem auto; gap: 10px; }
.gathering-log-row .log-status { color: var(--ok); }
.gathering-log-row .log-status.warn { color: var(--warn); }

/* ── Results ── */
.results-header-bar { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
.results-meta { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.results-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.results-table thead tr {
  border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink);
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted);
}
.results-table th { text-align: left; padding: 8px 10px; font-weight: 500; }
.results-table tbody tr { border-bottom: 1px solid var(--hairline); cursor: pointer; }
.results-table tbody tr:hover { background: var(--panel); }
.results-table tbody tr.selected { background: var(--panel); }
.col-rank { color: var(--muted); font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 11px; width: 3rem; }
.col-track { font-weight: 500; font-size: 14px; }
.col-artist { color: var(--muted); }
.col-genres { font-size: 11px; color: var(--muted); }
.genre-dot-list { display: flex; flex-wrap: wrap; gap: 6px; }
.genre-dot { display: flex; align-items: center; gap: 5px; cursor: pointer; padding: 2px 4px; border-radius: 3px; transition: background 150ms, color 150ms; }
.genre-dot.active { background: var(--ink); color: var(--bg); }
.genre-dot-color { width: 6px; height: 6px; border-radius: 50%; }
.col-similar { font-size: 11px; color: var(--muted); }
.col-score { font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 11px; width: 7rem; text-align: right; }
.results-table th.col-score { text-align: right; }
.score-bar { height: 3px; background: var(--ink); margin: 4px 0 0 auto; }

/* ── Expanded Row (breakdown) ── */
.expanded-row td { background: var(--panel); padding: 16px 10px; }
.breakdown-table { width: 100%; font-size: 13px; border-collapse: collapse; }
.breakdown-table th {
  text-align: left; padding: 4px 8px; font-size: 10px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--ink);
}
.breakdown-table td { padding: 6px 8px; border-bottom: 1px solid var(--hairline); }
.breakdown-table td.mono { font-family: var(--mono); font-size: 11px; color: var(--muted); text-align: right; }
.breakdown-table td.total { font-family: var(--mono); font-size: 11px; font-weight: 600; text-align: right; }
.breakdown-bar-bg { width: 80px; height: 2px; background: var(--hairline); }
.breakdown-bar-fill { height: 100%; background: var(--ink); }
.breakdown-reason { font-size: 12px; color: var(--muted); font-style: italic; margin-bottom: 12px; }

/* ── No Results ── */
.no-results {
  padding: 40px 20px; text-align: center; color: var(--muted); font-size: 13px;
  border: 1px solid var(--line); border-top: none;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  :root { --row-pad: 6px 10px; }
  .app-shell { padding: 0 16px 40px; }
  .stat-row { grid-template-columns: 1fr 1fr 1fr; gap: 12px; padding: 16px 0 12px; margin-bottom: 16px; }
  .stat-h1 { font-size: 24px; grid-column: 1 / span 3; }
  .stat-block-value { font-size: 22px; }
  .knobs-row { gap: 12px; }
  .editor-grid { grid-template-columns: 1fr; gap: 20px; }
  .editor-col-body { max-height: 300px; }
  .results-table thead { display: none; }
  .results-table tbody tr { display: block; border: 1px solid var(--line); margin-bottom: 8px; padding: 10px; }
  .results-table td { display: block; border: none; padding: 4px 0; }
  .col-name, .col-track { font-size: 16px; }
  .expanded-row td { padding: 10px; }
  .breakdown-table td.mono { text-align: left; }
  .gathering-panel { padding: 16px; }
  .gathering-log-row { grid-template-columns: 1.5rem 1fr 1fr; gap: 6px; font-size: 11px; }
}