/* Chi By Eye - styles */

:root {
  /* Light theme (default) */
  --bg:           #ffffff;
  --bg-soft:      #f9fafb;
  --fg:           #1f2937;
  --fg-soft:      #4b5563;
  --muted:        #6b7280;
  --hairline:     #e5e7eb;
  --accent:       #2563eb;
  --accent-soft:  rgba(37, 99, 235, 0.12);
  --good:         #10b981;
  --warn:         #f59e0b;
  --bad:          #ef4444;

  /* Plot colors — read by plot.js via getComputedStyle */
  --plot-bg:      #ffffff;
  --plot-fg:      #1f2937;
  --plot-axis:    #9ca3af;
  --plot-muted:   #6b7280;
  --plot-curve:   #2563eb;
  --plot-point:   #111827;
  --plot-err:     rgba(17, 24, 39, 0.55);
  --plot-good:    #10b981;
  --plot-mid:     #f59e0b;
  --plot-bad:     #ef4444;
  --plot-info:    #9ca3af;
  --plot-cloud:   #374151;
}

html[data-theme="dark"] {
  --bg:           #0d1117;
  --bg-soft:      #161b22;
  --fg:           #e6edf3;
  --fg-soft:      #c9d1d9;
  --muted:        #8b949e;
  --hairline:     #30363d;
  --accent:       #7bbfcc;
  --accent-soft:  rgba(123, 191, 204, 0.16);
  --good:         #4ade80;
  --warn:         #fbbf24;
  --bad:          #f87171;

  --plot-bg:      #0d1117;
  --plot-fg:      #e6edf3;
  --plot-axis:    #6e7681;
  --plot-muted:   #8b949e;
  --plot-curve:   #7bbfcc;
  --plot-point:   #e6edf3;
  --plot-err:     rgba(230, 237, 243, 0.55);
  --plot-good:    #4ade80;
  --plot-mid:     #fbbf24;
  --plot-bad:     #f87171;
  --plot-info:    #6e7681;
  --plot-cloud:   #c9d1d9;
}

* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--hairline);
  flex-shrink: 0;
}
.topbar .left, .topbar .right {
  display: flex; align-items: center; gap: 18px;
}
.topbar .title {
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg);
}
.topbar .meta {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.topbar .meta b {
  font-weight: 600;
  color: var(--fg-soft);
  margin-left: 6px;
  font-variant-numeric: tabular-nums;
}
.topbar .timer.warn { color: var(--bad); }
.topbar a.exit {
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.topbar a.exit:hover { color: var(--fg); }

/* ---------- main content area ---------- */
.stage {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0; /* allow children to shrink */
}

/* ---------- plot wrapper ---------- */
.plot-wrap {
  flex: 1;
  position: relative;
  min-height: 0;
}
.plot-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.live-readout {
  position: absolute;
  left: 16px;
  bottom: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.85;
  pointer-events: none;
  letter-spacing: 0.02em;
  line-height: 1.55;
}
.live-readout .lr-row { display: flex; gap: 6px; }
.live-readout .lr-key { color: var(--muted); }
.live-readout .lr-val { color: var(--fg-soft); font-variant-numeric: tabular-nums; }

/* ---------- control bar ---------- */
.controls {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 24px 18px;
  border-top: 1px solid var(--hairline);
  flex-shrink: 0;
}
.controls .label {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  min-width: 110px;
}
.controls .slider {
  flex: 1;
  position: relative;
  height: 36px;
  display: flex; align-items: center;
}
.controls .value {
  min-width: 96px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  color: var(--fg);
  font-weight: 500;
}

/* Slider styling */
input[type="range"].sigma {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: linear-gradient(
    to right,
    var(--good) 0%,
    var(--good) 18%,
    var(--warn) 38%,
    var(--bad)  72%,
    var(--bad)  100%
  );
  border-radius: 3px;
  outline: none;
}
input[type="range"].sigma::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  cursor: pointer;
  transition: transform 0.08s ease;
}
input[type="range"].sigma::-webkit-slider-thumb:hover { transform: scale(1.08); }
input[type="range"].sigma::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--accent);
  cursor: pointer;
}
input[type="range"].sigma:disabled { opacity: 0.6; }

/* Slider tick labels */
.slider-with-ticks {
  position: relative;
  flex: 1;
}
.slider-ticks {
  position: absolute;
  left: 0; right: 0;
  top: 26px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  pointer-events: none;
}

/* ---------- buttons ---------- */
button {
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 0.03em;
  padding: 8px 18px;
  border-radius: 6px;
  border: 1px solid var(--hairline);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  transition: background 0.1s ease, border-color 0.1s ease, color 0.1s ease;
}
button:hover { background: var(--bg-soft); }
button.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 500;
}
button.primary:hover {
  filter: brightness(1.08);
  background: var(--accent);
}
button.subtle {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 10px;
}
button.subtle:hover { color: var(--fg); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- menu overlay ---------- */
.menu {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: var(--bg);
  z-index: 10;
}
.menu h1 {
  font-size: 44px;
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.menu h1 .chi {
  font-family: 'Times New Roman', serif;
  font-style: italic;
  font-weight: 400;
}
.menu .tagline {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 36px;
  max-width: 520px;
  text-align: center;
}
.diff-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 28px;
  max-width: 680px;
  width: 100%;
}
.diff-grid button {
  padding: 14px 8px;
  flex-direction: column;
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--hairline);
  background: var(--bg);
}
.diff-grid button.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--fg);
}
.diff-grid button .dname {
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.diff-grid button .dmult {
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.menu .option-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  color: var(--fg-soft);
  font-size: 13px;
}
.menu .option-row label { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.menu .option-row input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }
.menu .option-row input[type="number"] {
  width: 60px;
  padding: 4px 8px;
  border: 1px solid var(--hairline);
  background: var(--bg);
  color: var(--fg);
  border-radius: 4px;
  font-family: inherit;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.menu .start-btn {
  font-size: 16px;
  padding: 12px 36px;
  border-radius: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.menu .footer-note {
  margin-top: 36px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.menu .footer-note a { color: var(--muted); }

/* ---------- reveal banner ---------- */
.reveal-banner {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 90px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  padding: 14px 22px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 18px;
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
html[data-theme="dark"] .reveal-banner { box-shadow: 0 4px 16px rgba(0,0,0,0.4); }
.reveal-banner .pair {
  display: flex; flex-direction: column; align-items: flex-start;
  font-variant-numeric: tabular-nums;
}
.reveal-banner .pair .k {
  font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--muted);
}
.reveal-banner .pair .v {
  font-size: 22px; font-weight: 500; color: var(--fg);
}
.reveal-banner .pair.score .v { color: var(--accent); }
.reveal-banner .next-btn {
  font-size: 14px;
  padding: 10px 22px;
}

/* ---------- summary screen ---------- */
.summary {
  position: absolute;
  inset: 0;
  background: var(--bg);
  z-index: 8;
  display: flex;
  flex-direction: column;
  padding: 28px;
  overflow: auto;
}
.summary .top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.summary h2 {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -0.005em;
}
.summary .total {
  font-size: 32px;
  font-weight: 500;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.summary .total .denom {
  color: var(--muted);
  font-size: 18px;
  font-weight: 400;
}
.summary .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  flex: 1;
}
.summary .panel {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 12px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}
.summary .panel .ptop {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.summary .panel canvas {
  width: 100%; flex: 1; min-height: 130px;
  display: block;
}
.summary .panel .row {
  font-size: 12px;
  display: flex; justify-content: space-between;
  color: var(--fg-soft);
  font-variant-numeric: tabular-nums;
  margin-top: 8px;
}
.summary .panel .row .k { color: var(--muted); }
.summary .panel .score-row {
  margin-top: 6px;
  font-weight: 500;
  color: var(--accent);
  font-size: 14px;
}

/* Mini slider visualization showing user guess vs true */
.mini-slider {
  position: relative;
  height: 18px;
  margin-top: 8px;
}
.mini-slider .track {
  position: absolute; top: 8px; left: 0; right: 0; height: 3px;
  background: var(--hairline);
  border-radius: 2px;
}
.mini-slider .marker {
  position: absolute;
  top: 1px;
  width: 1.5px;
  height: 16px;
  margin-left: -1px;
}
.mini-slider .marker.user { background: var(--accent); }
.mini-slider .marker.truth { background: var(--bad); height: 17px; top: 1px; }
.mini-slider .marker-labels {
  position: absolute;
  top: -4px;
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.04em;
  transform: translateX(-50%);
  white-space: nowrap;
}

.summary .actions {
  display: flex; justify-content: center; gap: 12px;
  margin-top: 24px;
}

/* ---------- small util ---------- */
.hidden { display: none !important; }