/* ── Base ──────────────────────────────────────────────────────────────────── */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #fbfdff;
  color: #1f2937;
  user-select: none;
}

main {
  max-width: 980px;
  margin: 28px auto;
  padding: 0 16px 48px;
}

/* ── Header ────────────────────────────────────────────────────────────────── */
h1 { margin: 0 0 10px; font-size: 22px; line-height: 1.3; }
h3 { margin: 0 0 6px; font-size: 14px; font-weight: 600; }
p  { margin: 0 0 12px; color: #4b5563; }
.lead { font-size: 14px; line-height: 1.65; }

/* ── Controls ──────────────────────────────────────────────────────────────── */
.controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin: 14px 0 8px;
  padding: 10px 16px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.ctrl-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrl-label { font-size: 12px; color: #6b7280; white-space: nowrap; }
.ctrl-unit  { font-size: 12px; color: #9ca3af; }

/* ── Sliders ───────────────────────────────────────────────────────────────── */
input[type="range"] {
  -webkit-appearance: none;
  width: 120px;
  height: 4px;
  background: #d1d5db;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #7c3aed;
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(124,58,237,0.18);
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #7c3aed;
  border: none;
  cursor: pointer;
}

.window-val { font-size: 15px; font-weight: 700; color: #7c3aed; min-width: 20px; text-align: right; }

/* ── Toggle ────────────────────────────────────────────────────────────────── */
.toggles { gap: 12px; }
.toggle-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: #374151; cursor: pointer;
}
.toggle-label input[type="checkbox"] {
  width: 14px; height: 14px; cursor: pointer; accent-color: #7c3aed;
}

.range-label { margin-left: auto; font-size: 12px; color: #6b7280; white-space: nowrap; }

.reset-btn {
  font-size: 12px;
  padding: 4px 12px;
  border: 1px solid #d1d5db;
  border-radius: 5px;
  background: #fff;
  color: #374151;
  cursor: pointer;
  white-space: nowrap;
}
.reset-btn:not(:disabled):hover { background: #f3f4f6; border-color: #9ca3af; }
.reset-btn:disabled { opacity: 0.38; cursor: default; }

/* ── SVG: shared ───────────────────────────────────────────────────────────── */
.axis path, .axis line { stroke: #d1d5db; }
.axis text { font-size: 11px; fill: #6b7280; }
.grid line { stroke: #f0f0f4; stroke-width: 1; }
.grid path { stroke: none; }
.label { font-size: 11px; fill: #6b7280; }

/* ── Baseline reference ─────────────────────────────────────────────────────── */
.zero-line {
  stroke: #9ca3af;
  stroke-dasharray: 4 3;
  stroke-width: 1;
}
.zero-line-label {
  font-size: 10px;
  fill: #9ca3af;
  font-style: italic;
}

/* ── Temperature lines ─────────────────────────────────────────────────────── */
.raw-line {
  fill: none;
  stroke: #c4b5fd;     /* faint lavender — noisy raw signal */
  stroke-width: 1.2;
  opacity: 0.6;
}
.roll-line {
  fill: none;
  stroke: #7c3aed;     /* purple — smoothed trend */
  stroke-width: 2.8;
}

/* ── Paris threshold ───────────────────────────────────────────────────────── */
.thresh-line {
  stroke: #dc2626;
  stroke-width: 1.5;
  stroke-dasharray: 6 4;
}
.thresh-label { font-size: 10px; fill: #dc2626; font-weight: 600; }

/* ── Crosshair + hover dot ─────────────────────────────────────────────────── */
.crosshair {
  stroke: #374151;
  stroke-width: 1;
  stroke-dasharray: 3 2;
}
.hover-dot {
  fill: #7c3aed;
  stroke: #fff;
  stroke-width: 2;
}
.mouse-overlay {
  fill: none;
  pointer-events: all;
  cursor: crosshair;
}

/* ── Warming stripes ───────────────────────────────────────────────────────── */
.stripes-svg { display: block; }

.stripe { stroke: none; }

/* White hover indicator line on stripes */
.stripe-hover-line { fill: rgba(255,255,255,0.85); }

/* Gradient legend below stripes */
.legend-label { font-size: 10px; fill: #6b7280; }

/* ── Brush on main chart ───────────────────────────────────────────────────── */
.brush .selection {
  fill: rgba(124,58,237,0.10);
  stroke: #7c3aed;
  stroke-width: 1.5;
}
.brush .handle { fill: #7c3aed; opacity: 0.5; }

/* ── Stripe selection brackets ─────────────────────────────────────────────── */
.stripe-bracket {
  fill: none;
  stroke: #000;
  stroke-width: 2.5;
  stroke-linejoin: miter;
}

/* ── Hint text ─────────────────────────────────────────────────────────────── */
.over-hint {
  font-size: 11px;
  color: #9ca3af;
  margin: 4px 0 2px;
  text-align: right;
}
.over-hint b { color: #6b7280; }

/* ── Histogram ─────────────────────────────────────────────────────────────── */
.hist-bar { opacity: 0.85; }

/* ── Bottom row ────────────────────────────────────────────────────────────── */
.bottom-row {
  display: flex;
  gap: 28px;
  margin-top: 20px;
  align-items: flex-start;
}
.hist-col { flex: 0 0 auto; width: 400px; }
.stats-col { flex: 1; padding-top: 24px; }

/* ── Stats ─────────────────────────────────────────────────────────────────── */
dl { margin: 8px 0 0; }
dt {
  font-size: 10px; color: #9ca3af;
  text-transform: uppercase; letter-spacing: 0.06em;
  margin-top: 16px;
}
dd { font-size: 20px; font-weight: 700; color: #1f2937; margin: 2px 0 0; }
.stats-note { font-size: 12px; color: #9ca3af; margin-top: 20px; line-height: 1.6; }
.subtitle   { font-size: 12px; color: #6b7280; margin: 0 0 4px; }

/* ── Tooltip ───────────────────────────────────────────────────────────────── */
.tooltip {
  position: fixed;
  pointer-events: none;
  background: #111827;
  color: #f9fafb;
  padding: 7px 11px;
  border-radius: 7px;
  font-size: 13px;
  line-height: 1.5;
  box-shadow: 0 4px 14px rgba(0,0,0,0.28);
  opacity: 0;
  transition: opacity 100ms ease;
  z-index: 30;
  white-space: nowrap;
}
/* ── Footer ────────────────────────────────────────────────────────────────── */
.data-note {
  margin-top: 32px;
  font-size: 11px;
  color: #9ca3af;
  border-top: 1px solid #e5e7eb;
  padding-top: 12px;
}