.wastewater-layout {
  --ww-teal: #004a60;
  --ww-teal-deep: #245c85;
  --ww-sea: #54b4b7;
  --ww-coral: #54b4b7;
  --ww-gold: #fbf0d7;
  --ww-sand: #fbf0d7;
  --ww-sky: #eaf6fb;
  --ww-shadow: 0 28px 64px rgba(10, 33, 42, 0.14);
  width: min(1040px, calc(100% - 28px));
  padding-bottom: 88px;
}

.hero {
  margin-bottom: 22px;
}

.hero-card {
  position: relative;
  overflow: hidden;
  padding: 28px 30px;
  border: 1px solid rgba(15, 90, 112, 0.12);
  border-radius: 0.55rem;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(251, 240, 215, 0.9) 72%, rgba(227, 243, 243, 0.72) 100%);
  box-shadow: var(--ww-shadow);
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 12px;
  background: linear-gradient(180deg, #004a60 0%, #54b4b7 100%);
}

.hero-card h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.calculator-picker,
.calculator-empty-state,
.calc-card,
.subcalc-card {
  border-radius: 0.55rem;
  border-color: rgba(15, 90, 112, 0.12);
  box-shadow: var(--ww-shadow);
}

.calculator-picker {
  margin-bottom: 20px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(8, 63, 80, 0.99), rgba(15, 90, 112, 0.95)),
    linear-gradient(90deg, rgba(240, 126, 93, 0.26), transparent 44%);
  color: #fff;
}

.calculator-picker__header {
  display: block;
}

.calculator-picker__select-wrap {
  display: grid;
  gap: 8px;
  width: min(100%, 460px);
  position: relative;
  z-index: 1;
}

.calculator-picker .field-label {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.calculator-picker__select,
.field input {
  width: 100%;
  min-height: 54px;
  padding: 12px 14px;
  border: 1px solid rgba(15, 90, 112, 0.12);
  border-radius: 0.55rem;
  background: linear-gradient(180deg, #ffffff, #f8fbfc);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.calculator-picker__select {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.97);
  color: var(--ww-teal-deep);
}

.calculator-picker__select:focus,
.field input:focus {
  outline: none;
  border-color: var(--ww-sea);
  box-shadow:
    0 0 0 4px rgba(31, 129, 147, 0.12),
    inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.helper-card,
.calc-card,
.subcalc-card {
  padding: 0;
}

.calc-card,
.subcalc-card {
  overflow: hidden;
}

.calc-grid {
  display: grid;
  gap: 20px;
}

.calc-card[hidden] {
  display: none;
}

.calc-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 251, 252, 0.97));
}

.calculator-empty-state {
  margin-bottom: 18px;
  padding: 20px 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(255, 248, 232, 0.94)),
    linear-gradient(90deg, rgba(244, 197, 66, 0.12), transparent 58%);
}

.calculator-empty-state__note {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

.calculator-empty-state__note--alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.calculator-empty-state__note--alert::before {
  content: "!";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.44rem;
  height: 1.44rem;
  margin-top: calc(0.18rem - 8px);
  flex: 0 0 auto;
  background: #f4c542;
  color: #111;
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  transform: translateY(6px);
}

.note {
  margin: 0;
  padding: 14px 22px 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.note strong {
  color: #c24a21;
  text-transform: uppercase;
}

.calc-fields {
  display: grid;
  gap: 16px;
  padding: 20px 22px 22px;
}

.calc-fields--three,
.calc-fields--dates {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.calc-fields--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.calc-fields--meter-inputs {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 0.95fr);
  align-items: start;
  row-gap: 10px;
}

.calc-fields--etm {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.3fr);
  align-items: start;
}

.calc-fields--dates {
  padding-bottom: 12px;
}

.calc-fields--two-results {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.calc-fields--tank-split {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  align-items: start;
}

.calc-fields--tank-rect-diagram {
  gap: 20px;
}

.calc-fields--tank-round-diagram {
  gap: 20px;
}

.calc-fields--tank-horizontal-diagram {
  gap: 20px;
}

.tank-rect-diagram {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(320px, 1fr);
  gap: 24px;
  align-items: center;
  min-width: 0;
}

.tank-round-diagram {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(300px, 0.92fr);
  gap: 24px;
  align-items: center;
  min-width: 0;
}

.tank-horizontal-diagram {
  display: grid;
  grid-template-columns: minmax(280px, 0.76fr) minmax(360px, 1fr);
  gap: 24px;
  align-items: center;
  min-width: 0;
}

.tank-rect-diagram__inputs {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.tank-round-diagram__inputs {
  display: grid;
  gap: 20px;
  align-content: start;
  min-width: 0;
}

.tank-horizontal-diagram__inputs {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.tank-rect-line {
  display: grid;
  grid-template-columns: 44px 116px 120px auto;
  align-items: end;
  column-gap: 4px;
  justify-content: start;
  min-width: 0;
  width: 100%;
}

.tank-rect-line__prefix,
.tank-rect-line__label,
.tank-rect-line__unit {
  font-family: "Outfit", sans-serif;
  line-height: 1;
}

.tank-rect-line__prefix {
  font-size: 2rem;
  font-weight: 400;
}

.tank-rect-line__label {
  font-size: 1.6rem;
  font-weight: 400;
  color: #111;
}

.tank-rect-line__unit {
  font-size: 1.55rem;
  font-weight: 400;
  color: #111;
}

.tank-rect-line--length .tank-rect-line__prefix {
  color: #ff1d1d;
}

.tank-rect-line--depth .tank-rect-line__prefix {
  color: #00a65a;
}

.tank-rect-line--width .tank-rect-line__prefix {
  color: #2f63ff;
}

.tank-rect-line--gold .tank-rect-line__prefix {
  color: #9f9200;
}

.tank-rect-line--magenta .tank-rect-line__prefix {
  color: #ff19ff;
}

.tank-rect-line input {
  width: 100%;
  min-height: 50px;
  padding: 10px 12px;
  border: 1px solid rgba(15, 90, 112, 0.12);
  border-radius: 0.55rem;
  background: linear-gradient(180deg, #ffffff, #f8fbfc);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.9);
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
}

.tank-rect-line input:focus {
  outline: none;
  border-color: var(--ww-sea);
  box-shadow:
    0 0 0 4px rgba(31, 129, 147, 0.12),
    inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.tank-rect-diagram__figure img {
  display: block;
  width: 100%;
  max-width: 390px;
  margin: 0 auto;
  height: auto;
  object-fit: contain;
}

.tank-round-diagram__figure img {
  display: block;
  width: 100%;
  max-width: 270px;
  margin: 0 auto;
  height: auto;
  object-fit: contain;
}

.tank-horizontal-diagram__figure img {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  height: auto;
  object-fit: contain;
}

.tank-rect-diagram__figure,
.tank-round-diagram__figure,
.tank-horizontal-diagram__figure {
  width: 100%;
  min-width: 0;
}

.tank-rect-results {
  display: grid;
  gap: 16px;
}

.calc-fields--outputs {
  padding-top: 0;
}

.field {
  display: grid;
  gap: 10px;
}

.calc-fields--meter-inputs .field {
  gap: 6px;
}

.calc-fields--meter-inputs .field input {
  min-height: 46px;
  padding-block: 10px;
}

.field-stack {
  display: grid;
  gap: 14px;
}

.field-stack--runtime {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.drip-calc-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.drip-calc-column {
  display: grid;
  grid-template-rows: auto auto;
  gap: 16px;
  align-content: start;
}

.drip-input-group {
  display: grid;
  gap: 10px;
  align-content: start;
}

.drip-input-labels,
.drip-input-row {
  display: grid;
  gap: 16px;
}

.drip-input-labels--double,
.drip-input-row--double {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.drip-input-row input {
  width: 100%;
  min-height: 54px;
  padding: 12px 14px;
  border: 1px solid rgba(15, 90, 112, 0.12);
  border-radius: 0.55rem;
  background: linear-gradient(180deg, #ffffff, #f8fbfc);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.drip-input-row input:focus {
  outline: none;
  border-color: var(--ww-sea);
  box-shadow:
    0 0 0 4px rgba(31, 129, 147, 0.12),
    inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.drip-calc-column .result-block {
  min-height: 0;
}

.field--tight {
  align-content: start;
  gap: 6px;
}

.field--no-wrap .field-label {
  white-space: nowrap;
}

.field-label {
  color: #39535d;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.calc-fields--onoff {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  row-gap: 14px;
}

.calc-fields--onoff .result-stack--row {
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.result-block,
.result-stack {
  height: 100%;
}

.result-stack {
  display: grid;
  gap: 12px;
}

.result-block {
  display: grid;
  align-content: center;
  gap: 8px;
  min-height: 90px;
  padding: 16px 18px;
  border: 1px solid rgba(15, 90, 112, 0.1);
  border-radius: 0.55rem;
  background:
    linear-gradient(135deg, rgba(234, 246, 251, 0.98), rgba(255, 255, 255, 0.97)),
    linear-gradient(90deg, rgba(240, 126, 93, 0.14), transparent 55%);
  position: relative;
  overflow: hidden;
}

.result-block::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--ww-coral), var(--ww-gold));
}

.result-block--highlight {
  border-color: rgba(8, 63, 80, 0.16);
  background: linear-gradient(135deg, var(--ww-teal-deep), var(--ww-sea));
}

.result-block--highlight::after {
  width: 8px;
  background: linear-gradient(180deg, #daff00 0%, #b8df00 100%);
}

.result-block--highlight .result-block__label,
.result-block--highlight strong {
  color: #fff;
}

.result-block--highlight .result-block__label {
  color: rgba(255, 255, 255, 0.82);
}

.result-block__label {
  color: #617078;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-block strong {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  line-height: 1.03;
}

.subcalc-grid {
  display: grid;
  gap: 16px;
  padding: 0 22px 22px;
}

.subcalc-card {
  border: 1px solid rgba(15, 90, 112, 0.1);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(240, 248, 250, 0.95));
  box-shadow: 0 18px 32px rgba(12, 38, 49, 0.08);
}

.subcalc-card h2 {
  margin: 0;
  padding: 18px 22px 0;
  color: var(--ww-teal-deep);
  font-size: 1.14rem;
  line-height: 1.1;
}

.reference-grid {
  display: grid;
  gap: 16px;
  padding: 14px 22px 22px;
}

.reference-group {
  padding-bottom: 18px;
}

.formula-list {
  margin: 0;
  padding: 18px 22px 0 40px;
  color: var(--muted);
  line-height: 1.65;
}

.formula-list li + li {
  margin-top: 10px;
}

.formula-list strong {
  color: var(--ink);
}

.formula-list--notes strong {
  color: inherit;
}

.section-banner {
  position: relative;
  overflow: hidden;
  padding: 18px 22px 16px;
  background:
    linear-gradient(135deg, var(--ww-teal-deep), var(--ww-sea)),
    linear-gradient(90deg, rgba(240, 126, 93, 0.28), transparent 50%);
  color: #fff;
}

.section-banner::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 12px;
  background: linear-gradient(180deg, #daff00 0%, #b8df00 100%);
}

.section-banner__title,
.section-banner__detail {
  display: block;
}

.section-banner__detail {
  margin-top: 4px;
  font-size: 0.52em;
  font-weight: 300;
  line-height: 1.15;
  opacity: 0.92;
}

@media (min-width: 1100px) {
  .subcalc-grid,
  .reference-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .reference-grid {
    grid-template-columns: 1fr;
  }

  .section-banner {
    font-size: 1.56rem;
  }
}

@media (max-width: 900px) {
  .wastewater-layout {
    width: min(100%, calc(100% - 20px));
  }

  .calculator-picker__select-wrap {
    width: 100%;
  }

  .calc-fields--onoff,
  .calc-fields--etm,
  .calc-fields--tank-split,
  .drip-calc-grid,
  .calc-fields--four,
  .calc-fields--three,
  .calc-fields--dates,
  .calc-fields--two-results {
    grid-template-columns: 1fr;
  }

  .tank-rect-diagram {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .tank-round-diagram {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .tank-horizontal-diagram {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .tank-rect-diagram__figure img {
    margin: 0 auto;
    max-width: 100%;
  }

  .tank-round-diagram__figure img {
    margin: 0 auto;
    max-width: 100%;
  }

  .tank-horizontal-diagram__figure img {
    margin: 0 auto;
    max-width: 100%;
  }

  .tank-rect-line {
    grid-template-columns: 32px 96px minmax(0, 100px) auto;
    column-gap: 2px;
    justify-content: start;
  }

  .tank-rect-line__prefix {
    font-size: 1.55rem;
  }

  .tank-rect-line__label,
  .tank-rect-line__unit {
    font-size: 1.25rem;
  }

  .tank-rect-diagram__figure,
  .tank-round-diagram__figure,
  .tank-horizontal-diagram__figure {
    display: flex;
    justify-content: center;
  }


  .drip-input-labels--double,
  .drip-input-row--double {
    grid-template-columns: 1fr;
  }

  .calc-fields--onoff .result-stack--row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .wastewater-layout {
    width: min(100%, calc(100% - 16px));
    padding-bottom: 96px;
  }

  .hero {
    margin-bottom: 16px;
  }

  .hero-card,
  .calculator-picker,
  .calculator-empty-state,
  .calc-card,
  .subcalc-card {
    border-radius: 0.55rem;
  }

  .hero-card {
    padding: 22px 18px;
  }

  .hero-card h1 {
    font-size: clamp(2rem, 11vw, 2.85rem);
    line-height: 0.96;
  }

  .calculator-picker {
    padding: 16px;
  }

  .calculator-empty-state {
    padding: 16px;
  }

  .tank-rect-line {
    grid-template-columns: 28px 84px minmax(0, 100px) auto;
  }

  .tank-rect-line input {
    min-height: 46px;
    padding: 8px 10px;
  }

  .tank-rect-line__prefix {
    font-size: 1.4rem;
  }

  .tank-rect-line__label,
  .tank-rect-line__unit {
    font-size: 1.15rem;
  }

  .section-banner {
    padding: 16px 16px 14px;
    font-size: 1.28rem;
  }

  .calc-fields,
  .subcalc-grid,
  .reference-grid,
  .subcalc-card h2,
  .note,
  .formula-list {
    padding-left: 16px;
    padding-right: 16px;
  }

  .subcalc-grid {
    padding-bottom: 16px;
  }

  .formula-list {
    padding-left: 34px;
  }
}