/* ── Design tokens (design contract, verbatim) ───────────────────── */
:root {
  --bg: #F5F7FA;
  --surface: #FFFFFF;
  --text: #1A2332;
  --text-secondary: #5A6B82;
  --border: #DDE3EC;
  --accent: #2553A0;
  --accent-hover: #1E4585;
  --positive: #2E7D5B;
  --warning: #C77700;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 2px rgba(26, 35, 50, 0.06), 0 1px 8px rgba(26, 35, 50, 0.04);
  --header-h: 76px;
}

* { box-sizing: border-box; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.skip-link {
  position: absolute; top: -40px; left: 8px; z-index: 2000;
  background: var(--accent); color: #fff; padding: 8px 14px; border-radius: var(--radius-sm);
}
.skip-link:focus { top: 8px; }

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tabular-num { font-variant-numeric: tabular-nums; font-feature-settings: 'tnum' 1; }

/* ── Header ───────────────────────────────────────────────────────── */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 14px 0;
}
.app-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.app-header-title { display: flex; align-items: center; gap: 14px; }
.header-icon { font-size: 26px; color: var(--accent); }
.app-header h1 {
  font-size: 28px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.header-sub { margin: 2px 0 0; color: var(--text-secondary); font-size: 13px; }

.app-header-period { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }
.period-label { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }
.period-form { display: flex; gap: 6px; }
.period-input {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 13px;
  color: var(--text);
  min-width: 220px;
  background: var(--bg);
}
.period-input:focus { outline: none; border-color: var(--accent); background: var(--surface); }
.btn-period-save {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  border-radius: var(--radius-sm);
  padding: 0 10px;
}
.btn-period-save:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Toasts ───────────────────────────────────────────────────────── */
.toast-stack {
  position: fixed;
  top: 90px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: min(560px, 92vw);
}
.app-toast {
  background: var(--surface);
  border: 1px solid var(--warning);
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  padding: 12px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: toast-in .2s ease-out;
}
@keyframes toast-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.app-toast i.toast-icon { color: var(--warning); margin-top: 2px; }
.app-toast-body { flex: 1; }
.app-toast-title { font-weight: 600; font-size: 13px; }
.app-toast-msg { color: var(--text-secondary); font-size: 13px; }
.app-toast-actions { display: flex; gap: 8px; margin-top: 6px; }
.app-toast .btn-toast-retry {
  background: var(--warning); color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 4px 10px; font-size: 12px; font-weight: 600;
}
.app-toast .btn-toast-close { background: none; border: none; color: var(--text-secondary); font-size: 14px; }

/* ── Body layout ──────────────────────────────────────────────────── */
.app-body { padding-top: 24px; padding-bottom: 40px; }

@media (min-width: 992px) {
  #controlPanelBody { position: sticky; top: calc(var(--header-h) + 24px); }
}

.control-panel-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.control-panel-toggle .toggle-chevron { transition: transform .2s ease; }
.control-panel-toggle[aria-expanded="true"] .toggle-chevron { transform: rotate(180deg); }

.control-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 18px;
}
.panel-block + .panel-block { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.panel-title { font-size: 16px; font-weight: 600; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; }
.panel-hint { color: var(--text-secondary); font-size: 12.5px; margin: 0 0 8px; }

.games-input { resize: vertical; font-size: 14px; border-color: var(--border); }
.games-input:focus { border-color: var(--accent); box-shadow: 0 0 0 0.2rem rgba(37,83,160,.15); }

.btn-accent {
  background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600;
}
.btn-accent:hover, .btn-accent:focus { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.queue-count {
  background: var(--bg); color: var(--text-secondary); border-radius: 20px; padding: 1px 9px; font-size: 12px; font-weight: 600;
}
.queue-list { list-style: none; margin: 10px 0 0; padding: 0; max-height: 280px; overflow-y: auto; }
.queue-item {
  display: flex; align-items: center; gap: 8px; padding: 8px 6px; border-radius: var(--radius-sm);
  font-size: 13px;
}
.queue-item + .queue-item { border-top: 1px solid var(--border); }
.queue-item-status { color: var(--text-secondary); width: 16px; text-align: center; }
.queue-item.status-processing .queue-item-status { color: var(--accent); }
.queue-item-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.queue-badge { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.badge-queued { background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border); }
.badge-processing { background: var(--accent); color: #fff; }
.badge-warning { background: rgba(199,119,0,.12); color: var(--warning); border: 1px solid var(--warning); font-weight: 600; font-size: 10px; text-transform: uppercase; }
.badge-demo { background: rgba(37,83,160,.1); color: var(--accent); border: 1px solid var(--accent); font-weight: 700; font-size: 10px; text-transform: uppercase; letter-spacing: .04em; }
.queue-empty { color: var(--text-secondary); font-size: 13px; padding: 10px 0; }

.btn-process {
  background: var(--accent); color: #fff; font-weight: 600; padding: 12px 16px; border-radius: var(--radius-sm);
  border: none; display: flex; align-items: center; justify-content: center; gap: 8px; position: relative;
}
.btn-process:hover:not(:disabled) { background: var(--accent-hover); }
.btn-process:disabled { background: var(--border); color: var(--text-secondary); cursor: not-allowed; }
.btn-process .btn-progress { display: flex; align-items: center; gap: 8px; }

/* ── Overview widgets ─────────────────────────────────────────────── */
.widget-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; height: 100%;
}
.widget-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--text-secondary); }
.widget-value { font-size: 26px; font-weight: 600; }
.widget-value-of { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.widget-leader { border-left: 3px solid var(--positive); }
.widget-leader-name { font-size: 18px; display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.widget-leader-score { font-size: 22px; color: var(--positive); font-weight: 600; }

/* ── Welcome / empty state ────────────────────────────────────────── */
.welcome-card {
  background: var(--surface); border: 1px dashed var(--accent); border-radius: var(--radius);
  padding: 20px 22px; margin-bottom: 20px;
}
.welcome-card p { color: var(--text-secondary); margin-bottom: 10px; }
.signal-legend { list-style: none; padding: 0; margin: 10px 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 8px 16px; }
.signal-legend li { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }

/* ── Ranking card / table ─────────────────────────────────────────── */
.ranking-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-card); overflow: hidden;
}
.ranking-card-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.ranking-card-head .panel-title { font-size: 20px; }
.ranking-count { font-size: 12px; color: var(--text-secondary); font-weight: 600; }

.ranking-table { margin: 0; }
.ranking-table thead th {
  font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  color: var(--text-secondary); border-bottom: 1px solid var(--border); background: var(--surface);
  padding: 12px 16px; white-space: nowrap;
}
.ranking-table thead th.sortable { cursor: pointer; user-select: none; }
.ranking-table thead th.sortable:hover { color: var(--accent); }
.sort-icon { font-size: 11px; margin-left: 4px; opacity: .5; }
.ranking-table thead th.sort-active .sort-icon { opacity: 1; color: var(--accent); }

.ranking-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.rank-row { cursor: pointer; transition: background-color .15s ease, opacity .18s ease, transform .18s ease; }
.rank-row:hover { background: var(--bg); }
.rank-row.resorting { opacity: 0; transform: translateY(6px); }
.rank-row.just-processed { animation: highlight-flash 1.8s ease-out; }
@keyframes highlight-flash {
  0% { background: rgba(46,125,91,.16); }
  100% { background: transparent; }
}

.rank-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--bg); color: var(--text-secondary); font-weight: 600; font-size: 13px;
}
.rank-badge-top { background: var(--positive); color: #fff; }

.col-game { position: relative; }
.game-title { font-weight: 600; }
.expand-chevron { float: right; color: var(--text-secondary); transition: transform .2s ease; margin-top: 4px; }
.rank-row[aria-expanded="true"] .expand-chevron { transform: rotate(180deg); }

.index-value { font-size: 16px; font-weight: 600; color: var(--accent); }

.contrib-chips { display: flex; flex-wrap: wrap; gap: 4px; }
.signal-chip {
  display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 600;
  padding: 2px 7px; border-radius: 20px; background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border);
  white-space: nowrap;
}
.signal-chip b { color: var(--text); font-weight: 700; }
.signal-chip-missing { opacity: .55; }
.signal-chip-missing b { color: var(--warning); }

/* subtle per-signal accent dot, purely decorative categorical coding — not a chart */
.signal-chip-demand_explainers::before,
.signal-chip-reddit_forums::before,
.signal-chip-fandom_wiki::before,
.signal-chip-steam_reviews::before,
.signal-chip-search_trends::before,
.signal-chip-streaming_social::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; display: inline-block;
}
.signal-chip-demand_explainers::before { background: #2553A0; }
.signal-chip-reddit_forums::before { background: #C77700; }
.signal-chip-fandom_wiki::before { background: #2E7D5B; }
.signal-chip-steam_reviews::before { background: #7A5AF8; }
.signal-chip-search_trends::before { background: #0E9F8E; }
.signal-chip-streaming_social::before { background: #D6416B; }

/* ── Detail (accordion) ───────────────────────────────────────────── */
.detail-row td { border-bottom: 1px solid var(--border); }
.detail-body { background: var(--bg); padding: 18px 20px; }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.detail-signal {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.detail-signal.status-error, .detail-signal.status-no_data { border-color: var(--warning); }
.detail-signal-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.detail-signal-weight { font-size: 11px; color: var(--text-secondary); }
.detail-signal-score { font-size: 18px; font-weight: 700; color: var(--accent); }
.detail-signal-nodata { font-size: 12px; font-weight: 600; color: var(--warning); }
.detail-signal-rationale { font-size: 13px; color: var(--text-secondary); margin: 0 0 8px; }
.detail-sources { display: flex; flex-direction: column; gap: 4px; }
.source-link { font-size: 12px; text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.source-link:hover { text-decoration: underline; }
.btn-retry {
  background: none; border: 1px solid var(--warning); color: var(--warning); border-radius: var(--radius-sm);
  font-size: 12px; font-weight: 600; padding: 5px 10px;
}
.btn-retry:hover { background: var(--warning); color: #fff; }

.table-empty-hint { padding: 16px 20px; color: var(--text-secondary); font-size: 13px; margin: 0; }

/* ── Footer ───────────────────────────────────────────────────────── */
.app-footer { padding: 24px 0 40px; }
.app-footer p { color: var(--text-secondary); font-size: 12.5px; margin: 0; max-width: 980px; }

/* ── Responsive < 768px ───────────────────────────────────────────── */
@media (max-width: 767.98px) {
  .app-header h1 { font-size: 22px; }
  .header-sub { display: none; }
  .app-header-period { align-items: flex-start; }
  .period-input { min-width: 150px; }

  #controlPanelBody:not(.show) { display: none; }

  .ranking-table { min-width: 640px; }
  .ranking-table thead th.col-rank, .ranking-table td.col-rank,
  .ranking-table thead th.col-game, .ranking-table td.col-game {
    position: sticky; background: var(--surface); z-index: 1;
  }
  .ranking-table td.col-rank, .ranking-table th.col-rank { left: 0; min-width: 48px; }
  .ranking-table td.col-game, .ranking-table th.col-game { left: 48px; min-width: 160px; box-shadow: 2px 0 4px rgba(26,35,50,.06); }
  .rank-row:hover .col-rank, .rank-row:hover .col-game { background: var(--bg); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}