.fena {
  --fena-ink: #172033;
  --fena-muted: #667085;
  --fena-line: #d7deea;
  --fena-panel: #fff;
  --fena-soft: #f4f8fb;
  --fena-blue: #1d70d6;
  --fena-yellow: #f2b705;
  --fena-orange: #ed6a2c;
  --fena-red: #cf2e2e;
  --fena-teal: #159c8c;

  background:
    linear-gradient(135deg, rgba(21, 156, 140, 0.12), rgba(237, 106, 44, 0.08)),
    var(--fena-panel);
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  color: var(--fena-ink);
  display: grid;
  gap: 12px;
  padding: 12px;
  width: 100%;
}

.theme-dark .fena {
  --fena-ink: #eef4ff;
  --fena-muted: #aab6c8;
  --fena-line: #344155;
  --fena-panel: #101827;
  --fena-soft: #1b2638;
  --fena-blue: #6da8ff;
  --fena-yellow: #ffd45a;
  --fena-orange: #ff9a5d;
  --fena-red: #ff6b6b;
  --fena-teal: #49d0bd;

  background: linear-gradient(135deg, rgba(17, 24, 39, 0.98), rgba(22, 39, 49, 0.98));
}

.fena__warning {
  align-items: center;
  background: linear-gradient(90deg, rgba(207, 46, 46, 0.16), rgba(242, 183, 5, 0.16));
  border: 1px solid rgba(207, 46, 46, 0.48);
  border-radius: 8px;
  display: grid;
  gap: 10px;
  grid-template-columns: 38px minmax(0, 1fr);
  padding: 10px 12px;
}

.fena__warning-mark {
  align-items: center;
  background: var(--fena-red);
  border-radius: 8px;
  color: #fff;
  display: flex;
  font-size: 28px;
  font-weight: 900;
  height: 38px;
  justify-content: center;
  line-height: 1;
}

.fena__warning strong,
.fena__warning span {
  display: block;
}

.fena__warning strong {
  font-size: 0.86rem;
  line-height: 1.2;
  text-transform: uppercase;
}

.fena__warning span {
  color: var(--fena-ink);
  font-size: 0.86rem;
  line-height: 1.35;
  margin-top: 2px;
}

.fena__grid {
  display: grid;
  gap: 12px;
}

.fena__panel {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  padding: 12px;
}

.theme-dark .fena__panel {
  background: rgba(17, 24, 39, 0.78);
}

.fena__panel--viz {
  display: grid;
  gap: 12px;
}

.fena__dial {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(244, 248, 251, 0.64)),
    var(--fena-soft);
  border: 1px solid var(--fena-line);
  aspect-ratio: 2.35;
  border-radius: 8px;
  min-height: 172px;
  overflow: hidden;
  position: relative;
}

.theme-dark .fena__dial {
  background:
    linear-gradient(180deg, rgba(27, 38, 56, 0.78), rgba(16, 24, 39, 0.62)),
    var(--fena-soft);
}

.fena__dial-arc {
  background:
    conic-gradient(
      from 248deg,
      var(--fena-red) 0 4%,
      var(--fena-blue) 4% 40%,
      var(--fena-yellow) 40% 64%,
      var(--fena-orange) 64% 84%,
      var(--fena-red) 84% 100%
    );
  border-radius: 999px 999px 0 0;
  bottom: 20px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.38);
  height: 150px;
  left: 28px;
  position: absolute;
  right: 28px;
}

.fena__dial-arc::after {
  background: var(--fena-panel);
  border-radius: 999px 999px 0 0;
  content: "";
  inset: 22px 22px 0;
  position: absolute;
}

.fena__needle {
  background: var(--fena-ink);
  border-radius: 999px;
  bottom: 30px;
  box-shadow: 0 2px 8px rgba(16, 24, 40, 0.18);
  height: 42%;
  left: 50%;
  position: absolute;
  transform: translateX(-50%) rotate(-82deg);
  transform-origin: 50% 100%;
  transition: transform 0.28s ease;
  width: 4px;
  z-index: 2;
}

.fena__needle::after {
  background: var(--fena-panel);
  border: 4px solid var(--fena-ink);
  border-radius: 999px;
  bottom: -10px;
  content: "";
  height: 20px;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
  width: 20px;
}

.fena__dial-center {
  align-items: center;
  background: color-mix(in srgb, var(--fena-panel) 88%, var(--fena-soft));
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  bottom: 14px;
  box-shadow: 0 12px 24px rgba(16, 24, 40, 0.08);
  display: grid;
  justify-items: center;
  left: 50%;
  min-width: 118px;
  padding: 8px 12px;
  position: absolute;
  transform: translateX(-50%);
  z-index: 3;
}

.fena__dial-center span,
.fena__dial-center small {
  color: var(--fena-muted);
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.fena__dial-center strong {
  color: var(--fena-ink);
  font-size: 1.72rem;
  line-height: 1;
  margin: 3px 0;
}

.fena__scale {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--fena-line);
  border-radius: 999px;
  color: var(--fena-ink);
  font-size: 0.7rem;
  font-weight: 900;
  padding: 4px 8px;
  position: absolute;
  z-index: 4;
}

.theme-dark .fena__scale {
  background: rgba(16, 24, 39, 0.88);
}

.fena__scale--low {
  bottom: 26px;
  left: 16px;
}

.fena__scale--mid {
  left: 50%;
  top: 26px;
  transform: translateX(-50%);
}

.fena__scale--high {
  bottom: 26px;
  right: 16px;
}

.fena__band {
  border-radius: 8px;
  display: grid;
  gap: 4px;
  min-height: 84px;
  padding: 12px;
}

.fena__band strong {
  display: block;
  font-size: 1rem;
  line-height: 1.2;
}

.fena__band span {
  color: var(--fena-muted);
  font-size: 0.86rem;
  line-height: 1.35;
}

.fena__band--empty {
  background: var(--fena-soft);
  border: 1px solid var(--fena-line);
}

.fena__band--prerenal {
  background: rgba(29, 112, 214, 0.12);
  border: 1px solid rgba(29, 112, 214, 0.42);
}

.fena__band--indeterminate {
  background: rgba(242, 183, 5, 0.16);
  border: 1px solid rgba(242, 183, 5, 0.58);
}

.fena__band--intrinsic {
  background: rgba(237, 106, 44, 0.15);
  border: 1px solid rgba(207, 46, 46, 0.46);
}

.fena__kidney {
  background: var(--fena-soft);
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  padding: 10px;
}

.fena__kidney svg {
  display: block;
  height: auto;
  width: 100%;
}

.fena__kidney-shape {
  fill: rgba(29, 112, 214, 0.12);
  stroke: var(--fena-blue);
  stroke-width: 4;
}

.fena__kidney-shape--right {
  fill: rgba(237, 106, 44, 0.12);
  stroke: var(--fena-orange);
}

.fena__tube {
  fill: none;
  stroke: var(--fena-ink);
  stroke-linecap: round;
  stroke-width: 5;
}

.fena__flow {
  fill: none;
  stroke-linecap: round;
  transition: stroke-width 0.28s ease;
}

.fena__flow--reabsorb {
  stroke: var(--fena-blue);
  stroke-width: 12;
}

.fena__flow--excrete {
  stroke: var(--fena-orange);
  stroke-width: 4;
}

.fena__na {
  fill: var(--fena-yellow);
  stroke: var(--fena-ink);
  stroke-width: 2;
}

.fena__flow-labels {
  display: grid;
  gap: 6px;
  grid-template-columns: 1fr 1fr;
}

.fena__flow-labels span {
  color: var(--fena-muted);
  font-size: 0.74rem;
  font-weight: 900;
  text-align: center;
}

.fena__panel--inputs {
  display: grid;
  gap: 14px;
}

.fena__field {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(244, 248, 251, 0.82)),
    var(--fena-panel);
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 10px;
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.18s ease;
}

.theme-dark .fena__field {
  background:
    linear-gradient(180deg, rgba(27, 38, 56, 0.78), rgba(16, 24, 39, 0.72)),
    var(--fena-panel);
}

.fena__field:focus-within {
  border-color: color-mix(in srgb, var(--fena-teal) 70%, var(--fena-line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--fena-teal) 18%, transparent);
  transform: translateY(-1px);
}

.fena__field > span {
  align-items: end;
  display: flex;
  color: var(--fena-muted);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.1;
  min-height: 18px;
  text-transform: uppercase;
}

.fena__input-shell {
  align-items: center;
  background: color-mix(in srgb, var(--fena-soft) 74%, var(--fena-panel));
  border: 1px solid color-mix(in srgb, var(--fena-line) 72%, transparent);
  border-radius: 8px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 58px;
  overflow: hidden;
}

.fena__input-shell--toggle {
  align-items: stretch;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 58px 40px;
}

.fena__input-shell input {
  background: transparent;
  border: 0;
  color: var(--fena-ink);
  font: inherit;
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1;
  min-width: 0;
  outline: 0;
  padding: 12px 14px;
}

.fena__input-shell input::placeholder {
  color: color-mix(in srgb, var(--fena-muted) 56%, transparent);
  font-weight: 800;
}

.fena__input-shell input::-webkit-outer-spin-button,
.fena__input-shell input::-webkit-inner-spin-button {
  margin: 0;
}

.fena__input-shell small {
  align-items: center;
  align-self: stretch;
  background: color-mix(in srgb, var(--fena-ink) 8%, transparent);
  border-left: 1px solid var(--fena-line);
  color: var(--fena-ink);
  display: flex;
  font-size: 0.78rem;
  font-weight: 900;
  justify-content: center;
  min-width: 88px;
  padding: 0 12px;
  white-space: nowrap;
}

.fena__toggle {
  background: color-mix(in srgb, var(--fena-soft) 82%, var(--fena-panel));
  border-top: 1px solid var(--fena-line);
  display: grid;
  gap: 6px;
  grid-template-columns: 1fr 1fr;
  padding: 5px;
}

.fena__toggle-btn {
  background: color-mix(in srgb, var(--fena-panel) 72%, transparent);
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--fena-muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.74rem;
  font-weight: 900;
  min-height: 30px;
  overflow: hidden;
  padding: 0 8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fena__toggle-btn:hover {
  border-color: color-mix(in srgb, var(--fena-teal) 38%, transparent);
  color: var(--fena-ink);
}

.fena__toggle-btn--active {
  background: linear-gradient(135deg, var(--fena-teal), var(--fena-blue));
  border-color: color-mix(in srgb, var(--fena-teal) 72%, var(--fena-blue));
  color: #fff;
  box-shadow: 0 6px 14px color-mix(in srgb, var(--fena-teal) 24%, transparent);
}

.fena__converted {
  color: var(--fena-muted);
  display: block;
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1.25;
  min-height: 18px;
  overflow-wrap: anywhere;
}

.fena__formula,
.fena__caveat {
  border: 1px solid var(--fena-line);
  border-radius: 8px;
  padding: 10px;
}

.fena__formula {
  display: grid;
  gap: 8px;
}

.fena__formula span,
.fena__caveat strong {
  color: var(--fena-muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.fena__formula code {
  background: var(--fena-soft);
  border: 1px solid var(--fena-line);
  border-radius: 6px;
  color: var(--fena-ink);
  display: block;
  font-size: 0.8rem;
  padding: 8px;
  white-space: normal;
}

.fena__caveat {
  background: rgba(242, 183, 5, 0.12);
  display: grid;
  gap: 5px;
}

.fena__caveat span {
  color: var(--fena-ink);
  font-size: 0.84rem;
  line-height: 1.35;
}

@media (min-width: 780px) {
  .fena__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

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

  .fena__formula,
  .fena__caveat {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1120px) {
  .fena__input-shell--toggle {
    grid-template-columns: minmax(0, 1fr) 156px;
    grid-template-rows: 58px;
  }

  .fena__input-shell--toggle .fena__toggle {
    border-left: 1px solid var(--fena-line);
    border-top: 0;
  }
}

@media (max-width: 460px) {
  .fena {
    padding: 10px;
  }

  .fena__warning {
    align-items: start;
  }

  .fena__dial {
    aspect-ratio: 2;
    min-height: 148px;
  }

  .fena__dial-arc {
    bottom: 18px;
    height: 124px;
    left: 18px;
    right: 18px;
  }

  .fena__dial-arc::after {
    inset: 18px 18px 0;
  }

  .fena__scale--low {
    left: 8px;
  }

  .fena__scale--high {
    right: 8px;
  }

  .fena__panel {
    padding: 10px;
  }

  .fena__field {
    padding: 9px;
  }

  .fena__input-shell {
    min-height: 54px;
  }

  .fena__input-shell--toggle {
    grid-template-rows: 54px 40px;
  }

  .fena__input-shell input {
    font-size: 1.28rem;
    padding: 10px 12px;
  }

  .fena__input-shell small {
    min-width: 76px;
    padding: 0 10px;
  }
}