:root {
  --bg: #f7f7f8;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #d1d5db;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    "Apple Color Emoji",
    "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
}

.page {
  min-height: 100vh;
  padding: 28px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  margin: 6px 0 8px;
  text-align: center;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.sub {
  text-align: center;
  color: var(--muted);
  margin: 0 0 22px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 1024px) {
  .grid {
    grid-template-columns: 2fr 1fr;
    gap: 22px;
  }
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.canvas-wrap {
  padding: 18px;
}

canvas {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  display: block;
}

.stack {
  display: grid;
  gap: 16px;
}

h2 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.row {
  display: grid;
  gap: 8px;
}
label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 14px;
}
.label-left {
  font-weight: 600;
}
.label-right {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  background: transparent;
  height: 6px;
  border-radius: 3px;
  cursor: pointer;
}

/* Base sliders colors */
#must {
  --track-color: #ef4444;
}
#can {
  --track-color: #3b82f6;
}
#want {
  --track-color: #10b981;
}

/* Mood sliders with per-slider color */
.mood-range {
  --track-color: var(--slider-color, #111827);
}

/* Track styling (all browsers) */
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: #d1d5db; /* plain grey background */
}
input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: #d1d5db; /* plain grey background */
}

/* Thumb styling */
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  border: 2px solid #333;
  background-color: var(--track-color, #111827);
  margin-top: -7px; /* center on track */
}
input[type="range"]::-moz-range-thumb {
  height: 20px;
  width: 20px;
  border-radius: 50%;
  border: 2px solid #333;
  background-color: var(--track-color, #111827);
}

/* Remove static half-fill: no gradient on the track */
input[type="range"]::-webkit-slider-runnable-track {
  background: #d1d5db;
}
input[type="range"]::-moz-range-progress {
  background-color: var(--track-color, #111827);
}
input[type="range"]::-moz-range-track {
  background-color: #d1d5db;
}

.deltas {
  margin-left: 4px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.legend {
  display: grid;
  gap: 10px;
  font-size: 13px;
  color: #111827;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
}
.swatch {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid #111827;
  background: #6b7280;
}
.swatch-green {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: rgba(100, 200, 100, 0.14);
  border: 1px dashed rgba(80, 180, 80, 0.9);
}
.swatch-black {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: #000;
  border: 2px solid #fff;
}
.swatch-black-red {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: #000;
  border: 2px solid #ef4444;
}
.arrow-swatch {
  width: 42px;
  height: 6px;
  background: #a855f7;
  border-radius: 999px;
  position: relative;
}
.arrow-swatch:after {
  content: "";
  position: absolute;
  right: -4px;
  top: -3px;
  width: 0;
  height: 0;
  border-left: 6px solid #a855f7;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}
.swatch-purple {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: rgba(168, 85, 247, 0.1);
  border: 1px dashed rgba(168, 85, 247, 0.45);
}

.btnrow {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}
button {
  border: 1px solid var(--border);
  background: #fff;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
button:hover {
  filter: brightness(0.98);
}