.bai {
  --bai-paper: #fbfaf7;
  --bai-panel: #fff;
  --bai-ink: #20242b;
  --bai-muted: #69707d;
  --bai-line: #d9dde3;
  --bai-line-strong: #bfc6d0;
  --bai-blue: #2f63c7;
  --bai-green: #2f8a58;
  --bai-amber: #b46b1f;
  --bai-red: #bd3b3b;
  --bai-shadow: rgba(32, 36, 43, 0.08);

  width: 100%;
}

.theme-dark .bai {
  --bai-paper: #12161d;
  --bai-panel: #191f28;
  --bai-ink: #f3f5f7;
  --bai-muted: #a9b0bd;
  --bai-line: #323a47;
  --bai-line-strong: #465263;
  --bai-shadow: rgba(0, 0, 0, 0.28);
}

.bai__shell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--bai-line);
  border-radius: 8px;
  background: var(--bai-paper);
  color: var(--bai-ink);
  box-shadow: 0 18px 42px var(--bai-shadow);
}

.bai__shell::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--bai-line) 38%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--bai-line) 32%, transparent) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.28;
}

.bai__shell--changed .bai__scoreline strong {
  animation: bai-score-pop 260ms ease-out;
}

.bai__shell--changed .bai__marker {
  animation: bai-marker-settle 360ms ease-out;
}

.bai__workbench {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0;
}

.bai__controls,
.bai__result {
  padding: clamp(1rem, 3vw, 1.5rem);
}

.bai__controls {
  display: grid;
  gap: 0.85rem;
  background: var(--bai-panel);
  border-bottom: 1px solid var(--bai-line);
}

.bai__figure {
  position: relative;
  height: 8.25rem;
  overflow: hidden;
  border: 1px solid var(--bai-line);
  border-radius: 8px;
  background:
    radial-gradient(circle at 50% 28%, color-mix(in srgb, var(--bai-blue) 12%, transparent), transparent 24%),
    var(--bai-paper);
}

.bai__figure-head,
.bai__figure-body,
.bai__figure-hip,
.bai__figure-line {
  position: absolute;
  left: 50%;
}

.bai__figure-head {
  top: 0.8rem;
  width: 1.8rem;
  height: 1.8rem;
  border: 2px solid var(--bai-ink);
  border-radius: 999px;
  transform: translateX(-50%);
}

.bai__figure-body {
  top: 2.75rem;
  width: 3rem;
  height: 4.25rem;
  border: 2px solid var(--bai-ink);
  border-bottom-width: 0;
  border-radius: 1.6rem 1.6rem 0.7rem 0.7rem;
  transform: translateX(-50%);
}

.bai__figure-hip {
  top: 5.55rem;
  width: 4.75rem;
  height: 1.35rem;
  border: 2px solid var(--bai-amber);
  border-radius: 999px;
  transform: translateX(-50%);
  transform-origin: 50% 50%;
  transition: transform 180ms ease;
}

.bai__figure-line {
  background: var(--bai-line-strong);
}

.bai__figure-line--height {
  top: 0.8rem;
  left: 1rem;
  width: 1px;
  height: 6.6rem;
}

.bai__figure-line--height::before,
.bai__figure-line--height::after,
.bai__figure-line--hip::before,
.bai__figure-line--hip::after {
  content: "";
  position: absolute;
  background: var(--bai-line-strong);
}

.bai__figure-line--height::before,
.bai__figure-line--height::after {
  left: -0.25rem;
  width: 0.5rem;
  height: 1px;
}

.bai__figure-line--height::before { top: 0; }
.bai__figure-line--height::after { bottom: 0; }

.bai__figure-line--hip {
  top: 6.2rem;
  width: 5.8rem;
  height: 1px;
  transform: translateX(-50%);
}

.bai__figure-line--hip::before,
.bai__figure-line--hip::after {
  top: -0.25rem;
  width: 1px;
  height: 0.5rem;
}

.bai__figure-line--hip::before { left: 0; }
.bai__figure-line--hip::after { right: 0; }

.bai__switch-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

.bai__unit,
.bai__sex {
  display: inline-grid;
  grid-auto-flow: column;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--bai-line);
  border-radius: 8px;
  background: var(--bai-paper);
}

.bai__unit {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bai__unit-btn,
.bai__sex-btn {
  height: 2.35rem;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--bai-muted);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 800;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, box-shadow 0.16s ease;
}

.bai__sex-btn {
  width: 2.35rem;
  display: inline-grid;
  place-items: center;
}

.bai__sex-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

.bai__unit-btn:hover,
.bai__sex-btn:hover {
  color: var(--bai-ink);
  box-shadow: 0 0 0 1px var(--bai-line-strong) inset;
}

.bai__unit-btn:active,
.bai__sex-btn:active {
  transform: translateY(1px);
}

.bai__unit-btn--active,
.bai__sex-btn--active {
  background: var(--bai-ink);
  color: var(--bai-panel);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.16) inset;
}

.theme-dark .bai__unit-btn--active,
.theme-dark .bai__sex-btn--active {
  background: #eef2f7;
  color: #161b22;
}

.bai__field {
  display: grid;
  gap: 0.65rem;
  padding: 0.8rem 0.85rem;
  border: 1px solid var(--bai-line);
  border-radius: 8px;
  background: var(--bai-paper);
  transition: border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}

.bai__field:focus-within {
  border-color: var(--bai-line-strong);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bai-blue) 14%, transparent);
  transform: translateY(-1px);
}

.bai__field-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  color: var(--bai-muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.bai__field-top strong {
  color: var(--bai-ink);
  font-size: clamp(1.3rem, 5vw, 1.75rem);
  line-height: 1;
}

.bai__range {
  --track-color: color-mix(in srgb, var(--bai-ink) 18%, transparent);

  width: 100%;
  height: 1.4rem;
  margin: 0;
  accent-color: var(--bai-ink);
  cursor: ew-resize;
}

.bai__range::-webkit-slider-runnable-track {
  height: 0.42rem;
  border-radius: 999px;
  background: var(--track-color);
}

.bai__range::-webkit-slider-thumb {
  margin-top: -0.44rem;
  width: 1.28rem;
  height: 1.28rem;
  border: 2px solid var(--bai-panel);
  border-radius: 999px;
  background: var(--bai-ink);
  box-shadow: 0 3px 12px var(--bai-shadow);
}

.bai__range::-moz-range-track {
  height: 0.42rem;
  border-radius: 999px;
  background: var(--track-color);
}

.bai__range::-moz-range-thumb {
  width: 1.28rem;
  height: 1.28rem;
  border: 2px solid var(--bai-panel);
  border-radius: 999px;
  background: var(--bai-ink);
  box-shadow: 0 3px 12px var(--bai-shadow);
}

.bai__result {
  display: grid;
  gap: 1rem;
  align-content: center;
}

.bai__scoreline {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: baseline;
  color: var(--bai-muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.bai__scoreline strong {
  color: var(--bai-ink);
  font-size: clamp(4.1rem, 18vw, 7.5rem);
  font-weight: 950;
  line-height: 0.86;
  letter-spacing: 0;
  text-align: center;
  font-variant-numeric: tabular-nums;
  transition: color 0.16s ease;
}

.bai__scale {
  display: grid;
  gap: 0.55rem;
}

.bai__scale-track {
  position: relative;
  display: grid;
  grid-template-columns: 21fr 29fr 15fr 35fr;
  height: 1.1rem;
  overflow: visible;
  border: 1px solid var(--bai-line-strong);
  border-radius: 999px;
  background: var(--bai-panel);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset;
}

.bai__band {
  min-width: 0;
}

.bai__band--low { background: color-mix(in srgb, var(--bai-blue) 72%, transparent); }
.bai__band--healthy { background: color-mix(in srgb, var(--bai-green) 72%, transparent); }
.bai__band--elevated { background: color-mix(in srgb, var(--bai-amber) 78%, transparent); }
.bai__band--high { background: color-mix(in srgb, var(--bai-red) 74%, transparent); }

.bai__marker {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.9rem;
  height: 2.15rem;
  border: 2px solid var(--bai-paper);
  border-radius: 999px;
  background: var(--bai-ink);
  box-shadow: 0 0 0 1px var(--bai-line-strong), 0 8px 18px var(--bai-shadow);
  transform: translate(-50%, -50%);
  transition: left 0.18s ease;
}

.bai__ticks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.25rem;
  color: var(--bai-muted);
  font-size: 0.68rem;
  font-weight: 850;
  text-transform: uppercase;
}

.bai__ticks span:nth-child(2),
.bai__ticks span:nth-child(3) {
  text-align: center;
}

.bai__ticks span:last-child {
  text-align: right;
}

.bai__readout {
  min-height: 6.7rem;
  padding: 0.95rem;
  border: 1px solid var(--bai-line);
  border-radius: 8px;
  background: var(--bai-panel);
  transition: border-color 0.16s ease;
}

.bai__readout strong {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--bai-ink);
  font-size: clamp(1.2rem, 4vw, 1.65rem);
  line-height: 1.1;
}

.bai__readout p {
  margin: 0;
  color: var(--bai-muted);
  font-size: 0.94rem;
  line-height: 1.5;
}

.bai__result[data-level="low"] .bai__readout strong { color: var(--bai-blue); }
.bai__result[data-level="healthy"] .bai__readout strong { color: var(--bai-green); }
.bai__result[data-level="elevated"] .bai__readout strong { color: var(--bai-amber); }
.bai__result[data-level="high"] .bai__readout strong { color: var(--bai-red); }
.bai__result[data-level="low"] .bai__scoreline strong { color: var(--bai-blue); }
.bai__result[data-level="healthy"] .bai__scoreline strong { color: var(--bai-green); }
.bai__result[data-level="elevated"] .bai__scoreline strong { color: var(--bai-amber); }
.bai__result[data-level="high"] .bai__scoreline strong { color: var(--bai-red); }

.bai__notes {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--bai-line);
}

.bai__info {
  display: grid;
  grid-template-columns: 1.45rem 1fr;
  gap: 0.7rem;
  align-items: start;
  padding: 0.78rem 0.95rem;
  border-bottom: 1px solid var(--bai-line);
  background: var(--bai-panel);
  color: var(--bai-muted);
  transition: background-color 0.16s ease;
}

.bai__info:hover {
  background: var(--bai-paper);
}

.bai__info:last-child {
  border-bottom: 0;
}

.bai__info span {
  display: grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  color: var(--bai-blue);
}

.bai__info svg {
  width: 1.15rem;
  height: 1.15rem;
}

.bai__info p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.45;
}

.bai__info strong {
  color: var(--bai-ink);
}

.bai__info--warning span,
.bai__info--warning strong {
  color: var(--bai-amber);
}

@media (max-width: 420px) {
  .bai__switch-row {
    grid-template-columns: 1fr;
  }

  .bai__sex {
    width: max-content;
  }

  .bai__scoreline {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 0.15rem;
  }
}

@media (min-width: 780px) {
  .bai__workbench {
    grid-template-columns: minmax(300px, 0.78fr) minmax(360px, 1fr);
  }

  .bai__controls {
    border-right: 1px solid var(--bai-line);
    border-bottom: 0;
  }

  .bai__result {
    padding: clamp(1.25rem, 3vw, 2rem);
  }

  .bai__notes {
    grid-template-columns: repeat(3, 1fr);
  }

  .bai__info {
    border-right: 1px solid var(--bai-line);
    border-bottom: 0;
  }

  .bai__info:last-child {
    border-right: 0;
  }
}

@keyframes bai-score-pop {
  0% { transform: translateY(0) scale(1); }
  45% { transform: translateY(-2px) scale(1.025); }
  100% { transform: translateY(0) scale(1); }
}

@keyframes bai-marker-settle {
  0% { transform: translate(-50%, -50%) scaleY(0.82); }
  55% { transform: translate(-50%, -50%) scaleY(1.08); }
  100% { transform: translate(-50%, -50%) scaleY(1); }
}