/*
  signals-explainer.css
  Universal Explainer — a single dictionary-backed modal that opens when ANY
  element marked [data-explain="key"] is clicked. Used on tier badges,
  convergence chips, freshness chips, score headers, intelligence chips, tab
  chrome bars, and the column-picker info hints.

  Visual contract: dark glass card centered on screen, max-width 520px, hard
  overlay behind, animates fade+scale in 160ms. Honors prefers-reduced-motion.
*/

/* ─────────────────────────────────────────────────────────────────────── */
/* 1. Trigger cues — make explainable elements obvious without being noisy */
/* ─────────────────────────────────────────────────────────────────────── */
[data-explain] {
  cursor: help;
  position: relative;
}
[data-explain]:hover {
  outline: 1px dashed rgba(0,170,255,0.45);
  outline-offset: 2px;
  border-radius: 4px;
}
[data-explain]:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* Inline info button — sits next to chrome-bar titles + similar headers */
.gg-info-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-left: 8px;
  padding: 0;
  background: rgba(0,170,255,0.08);
  border: 1px solid rgba(0,170,255,0.25);
  border-radius: 50%;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  line-height: 1;
  cursor: help;
  vertical-align: baseline;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}
.gg-info-btn::before { content: 'i'; font-style: italic; }
.gg-info-btn:hover {
  background: var(--blue);
  color: var(--bg);
  transform: scale(1.1);
}

/* ─────────────────────────────────────────────────────────────────────── */
/* 2. Modal scaffold                                                       */
/* ─────────────────────────────────────────────────────────────────────── */
.gg-exp-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: gg-exp-fadein 160ms ease-out;
}
.gg-exp-overlay.is-open { display: flex; }

.gg-exp-card {
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface2) 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  color: var(--text);
  font-family: var(--font-sans);
  animation: gg-exp-rise 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.gg-exp-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px 12px;
  border-bottom: 1px solid var(--border);
}
.gg-exp-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.25;
}
.gg-exp-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 4px;
}
.gg-exp-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.gg-exp-close:hover { background: rgba(255,51,102,0.10); color: var(--red); border-color: rgba(255,51,102,0.30); }

.gg-exp-body { padding: 16px 20px 6px; }
.gg-exp-body p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text);
}
.gg-exp-body p:last-child { margin-bottom: 0; }
.gg-exp-body strong { color: var(--text-bright); font-weight: 600; }
.gg-exp-body code {
  background: rgba(0,170,255,0.10);
  border: 1px solid rgba(0,170,255,0.20);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue);
}

/* Stat block — backtest / threshold / formula */
.gg-exp-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 12px 0 4px;
  padding: 10px 12px;
  background: rgba(0,170,255,0.05);
  border: 1px solid rgba(0,170,255,0.15);
  border-radius: 8px;
}
.gg-exp-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.gg-exp-stat-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.gg-exp-stat-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-bright);
  font-variant-numeric: tabular-nums;
}
.gg-exp-stat-val.pos { color: var(--green); }
.gg-exp-stat-val.neg { color: var(--red); }
.gg-exp-stat-val.warn { color: var(--amber); }
.gg-exp-stat-val.info { color: var(--blue); }

/* Threshold list — tier table style */
.gg-exp-thresholds {
  margin: 12px 0 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.gg-exp-thresh-row {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 12px;
  border-bottom: 1px solid var(--border);
}
.gg-exp-thresh-row:last-child { border-bottom: none; }
.gg-exp-thresh-row.is-active {
  background: rgba(0,170,255,0.06);
}
.gg-exp-thresh-tier {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 12px;
}
.gg-exp-thresh-desc { color: var(--text-dim); font-size: 11px; }
.gg-exp-thresh-range {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.gg-exp-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}
.gg-exp-readmore {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--blue);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.gg-exp-readmore:hover { color: var(--text-bright); }
.gg-exp-readmore:empty { display: none; }
.gg-exp-keybind {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}
.gg-exp-keybind kbd {
  display: inline-block;
  padding: 1px 5px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
}

/* ─────────────────────────────────────────────────────────────────────── */
/* 3. Animations + a11y                                                    */
/* ─────────────────────────────────────────────────────────────────────── */
@keyframes gg-exp-fadein { from { opacity: 0; } to { opacity: 1; } }
@keyframes gg-exp-rise {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .gg-exp-overlay, .gg-exp-card { animation: none; }
}

/* Mobile */
@media (max-width: 600px) {
  .gg-exp-overlay { padding: 12px; align-items: flex-end; }
  .gg-exp-card { max-height: 90vh; }
  .gg-exp-stats { grid-template-columns: 1fr; }
}