:root {
  --ink: #101716;
  --muted: #55615d;
  --line: #7d8983;
  --paper: #f5f2ec;
  --card: #e4ece7;
  --green: #245d50;
  --warning: #8c551d;
}

.calculator-catalog {
  border: 1px solid #111;
  padding: 28px;
  background: #eef1ef;
}
.calculator-catalog > .form-heading > span { color: var(--muted); font-size: 12px; text-align: right; }
.calculator-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 26px; }
.calculator-card { display: flex; min-height: 235px; flex-direction: column; align-items: flex-start; padding: 20px; border: 1px solid #111; background: #fff; color: inherit; text-decoration: none; transition: transform .16s ease, background .16s ease; }
.calculator-card:hover, .calculator-card:focus-visible { transform: translateY(-3px); background: #dce8e1; }
.calculator-card span { color: var(--green); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.calculator-card h3 { margin: 34px 0 10px; font-family: Georgia, serif; font-size: 26px; line-height: 1; }
.calculator-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.calculator-card b { margin-top: auto; padding-top: 20px; color: var(--green); font-size: 13px; }
.calculator-view-header { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; border: 1px solid #111; border-bottom: 0; padding: 14px 20px; background: #1b2a26; color: #fff; }
.calculator-view-header a { color: #fff; font-size: 13px; font-weight: 700; text-decoration: none; }
.calculator-view-header span { font-size: 13px; font-weight: 700; }
.calculator-view-header small { color: #c7d3ce; font-size: 11px; text-align: right; }

.water-balance-panel {
  margin-top: 20px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(19, 38, 33, 0.07);
}
.balance-profile { margin: 22px 0; padding: 18px; border: 1px solid var(--line); background: #f7f5ef; }
.balance-profile label { display: grid; gap: 7px; font-size: 12px; font-weight: 700; }
.balance-profile input, .balance-profile select { width: 100%; border: 1px solid #76847e; background: #fff5c8; padding: 11px; font: inherit; color: inherit; }
.balance-profile output { align-self: center; color: var(--green); font-size: 13px; }
.water-balance-layout { display: grid; gap: 20px; margin-top: 24px; }
.water-inputs, .fire-inputs, .water-balance-output { border: 1px solid var(--line); padding: 20px; background: #fbfcfa; }
.balance-section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 15px; }
.balance-section-heading h3, .fire-inputs h3, .water-balance-output h3 { margin: 0; }
.water-table-wrap, .balance-detail-wrap { overflow: auto; border: 1px solid var(--line); }
.water-table, .balance-detail { width: 100%; border-collapse: collapse; min-width: 1120px; font-size: 12px; }
.water-table th, .water-table td, .balance-detail th, .balance-detail td { padding: 8px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
.water-table th:first-child, .water-table td:first-child, .balance-detail th:first-child { text-align: left; }
.water-table th, .balance-detail thead { background: #173d39; color: #fff; font-size: 10px; letter-spacing: 0.03em; }
.water-table td:first-child { min-width: 230px; }
.water-table input { width: 76px; min-height: 32px; padding: 5px 7px; border: 1px solid #d4b85f; background: #fff5c8; border-radius: 2px; font: inherit; text-align: right; }
.water-table td:first-child input { width: 100%; min-width: 220px; text-align: left; }
.water-table .icon-button { display: inline-grid; }
.fire-inputs .fields { margin-top: 16px; }
.balance-summary { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 18px 0; }
.balance-summary div { background: #e2f0d9; padding: 14px; }
.balance-summary span { display: block; color: var(--muted); font-size: 11px; }
.balance-summary strong { display: block; margin-top: 5px; font-size: 17px; color: var(--ink); }
.balance-detail th { font-weight: 700; }
.balance-detail tbody tr:last-child { background: #d9ead3; font-weight: 700; }
.water-balance-output { margin-top: 20px; background: #fff; }
.water-balance-output .editor-actions { margin-top: 18px; }
@media (max-width: 760px) {
  .calculator-catalog { padding: 20px; }
  .calculator-cards { grid-template-columns: 1fr; }
  .calculator-card { min-height: 180px; }
  .calculator-card h3 { margin-top: 24px; }
  .calculator-view-header { grid-template-columns: 1fr; gap: 5px; }
  .calculator-view-header small { text-align: left; }
  .water-balance-panel { padding: 20px; }
  .balance-summary { grid-template-columns: 1fr 1fr; }
  .balance-section-heading { align-items: center; }
  .water-inputs, .fire-inputs, .water-balance-output { padding: 15px; }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, Arial, sans-serif;
}
.calculator-shell {
  max-width: 1240px;
  margin: auto;
  padding: 25px 34px 52px;
}
.calculator-header {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #111;
  padding-bottom: 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.calculator-header a {
  color: inherit;
  text-decoration: none;
}
.calculator-intro {
  padding: 78px 0 46px;
  max-width: 790px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 11px;
  font-weight: 700;
}
.calculator-intro h1 {
  margin: 12px 0 20px;
  font-family: Georgia, serif;
  font-size: clamp(48px, 8vw, 88px);
  line-height: 0.85;
  letter-spacing: -0.065em;
}
.calculator-intro > p:last-child,
.lead {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.52;
}
.calculator-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid #111;
}
.calculator-tabs button {
  border: 1px solid #111;
  border-bottom: 0;
  background: #e4e8e5;
  padding: 13px 20px;
  color: inherit;
  font:
    700 13px Inter,
    Arial,
    sans-serif;
  cursor: pointer;
}
.calculator-tabs button + button {
  border-left: 0;
}
.calculator-tabs .is-active {
  background: #1b2a26;
  color: #fff;
}
.calculator-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(330px, 0.82fr);
  border: 1px solid #111;
  border-top: 0;
}
.calculator-form,
.calculation-results,
.table-workbench,
.table-editor,
.saved {
  padding: 28px;
  background: #eef1ef;
}
.calculator-form,
.table-workbench {
  border-right: 1px solid #111;
}
.calculation-results {
  background: #f7f5ef;
}
.form-heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
  border-bottom: 1px solid #111;
  padding-bottom: 17px;
  margin-bottom: 22px;
}
.form-heading p {
  margin: 0;
}
.form-heading h2 {
  font-family: Georgia, serif;
  font-size: 30px;
  margin: 5px 0 0;
}
.form-heading output {
  color: var(--green);
  font-size: 13px;
  text-align: right;
}
.calculator-form label,
.table-editor label,
.table-workbench label {
  display: grid;
  gap: 7px;
  font-size: 12px;
  font-weight: 700;
}
.calculator-form input,
.calculator-form textarea,
.table-editor input,
.table-editor textarea,
.table-workbench input,
.table-workbench select {
  width: 100%;
  border: 1px solid #76847e;
  border-radius: 0;
  background: #faf9f5;
  padding: 11px;
  font: inherit;
  color: inherit;
}
.wide {
  margin: 0 0 15px;
}
.fields,
.lookup-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.loss-table {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 26px 0;
  padding: 18px 0;
}
.loss-table h3 {
  margin: 4px 0;
  font-size: 17px;
}
.loss-table p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}
.loss-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px 72px 30px;
  gap: 7px;
  align-items: end;
  margin-top: 10px;
}
.loss-row label,
.editor-row label {
  font-size: 10px !important;
}
.loss-row input,
.editor-row input {
  padding: 8px !important;
}
.icon-button {
  border: 0;
  background: transparent;
  color: #4f5b56;
  font-size: 20px;
  cursor: pointer;
}
.text-button {
  border: 0;
  background: transparent;
  color: var(--green);
  padding: 10px 0;
  font-weight: 700;
  cursor: pointer;
}
.pipe-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 28px 0 18px;
  background: #111;
  border: 1px solid #111;
}
.pipe-preview div {
  min-height: 90px;
  padding: 13px;
  background: #dce8e1;
}
.pipe-preview span,
.pipe-preview small {
  display: block;
  font-size: 11px;
  color: #4d5d56;
}
.pipe-preview strong {
  display: block;
  margin-top: 13px;
  font-size: 18px;
}
.pipe-preview small {
  grid-column: 1/-1;
  background: #f7f5ef;
  padding: 11px;
}
.primary,
.secondary,
.danger {
  border: 0;
  padding: 14px 16px;
  font-weight: 700;
  cursor: pointer;
}
.primary {
  background: var(--green);
  color: #fff;
}
.primary span {
  float: right;
  margin-left: 25px;
  font-size: 18px;
}
.secondary {
  background: transparent;
  border: 1px solid #53615c;
}
.danger {
  background: #8c342b;
  color: #fff;
}
.diameter-choice {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
  font-size: 13px;
}
.diameter-choice b {
  font-size: 16px;
}
.diameter-choice small {
  color: var(--muted);
}
.diameter-choice--recommended {
  background: #dce8e1;
  margin: 0 -10px;
  padding: 12px 10px;
}
.disclaimer {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
.table-panel {
  grid-template-columns: 1fr 1fr;
}
.table-workbench select {
  margin: 12px 0 18px;
}
.lookup-result {
  margin: 18px 0;
  border: 1px solid #111;
  padding: 18px;
  background: #dce8e1;
  font-size: 14px;
}
.lookup-result strong {
  display: block;
  margin-top: 5px;
  font-size: 24px;
}
.table-rows {
  max-height: 330px;
  overflow: auto;
}
.table-row {
  display: grid;
  grid-template-columns: 1fr 1fr minmax(90px, 1fr);
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding: 9px 0;
  font-size: 12px;
}
.table-row span {
  color: var(--muted);
}
.editor-rows {
  display: grid;
  gap: 8px;
  margin: 18px 0;
}
.editor-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 100px 100px 30px;
  gap: 7px;
  align-items: end;
}
.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.saved {
  border: 1px solid #111;
  border-top: 0;
  background: #f7f5ef;
}
.calculations-list {
  display: grid;
  gap: 0;
}
.calculation {
  display: grid;
  grid-template-columns: 1fr auto 24px;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  padding: 17px 0;
}
.calculation h3 {
  margin: 0 0 5px;
  font-size: 15px;
}
.calculation p,
.calculation__result span {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}
.calculation__result {
  text-align: right;
}
.calculation__result strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
}
.calculation button {
  border: 0;
  background: transparent;
  color: #5e6b66;
  font-size: 24px;
  cursor: pointer;
}
.empty {
  color: var(--muted);
  font-size: 14px;
}
.paste-table {
  margin: 17px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}
.paste-table summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}
.paste-table p {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}
.paste-table code {
  color: var(--ink);
}
.paste-table textarea {
  margin-top: 5px;
}
@media (max-width: 760px) {
  .calculator-shell {
    padding: 20px;
  }
  .calculator-intro {
    padding: 54px 0 36px;
  }
  .calculator-panel,
  .table-panel {
    grid-template-columns: 1fr;
  }
  .calculator-form,
  .table-workbench,
  .table-editor {
    min-width: 0;
  }
  .calculator-form,
  .table-workbench {
    border-right: 0;
    border-bottom: 1px solid #111;
  }
  .fields,
  .lookup-fields {
    grid-template-columns: 1fr;
  }
  .pipe-preview {
    grid-template-columns: 1fr;
  }
  .pipe-preview small {
    grid-column: auto;
  }
  .loss-row {
    grid-template-columns: 1fr 78px 60px 28px;
  }
  .editor-row {
    grid-template-columns: 1fr 76px 76px 26px;
  }
  .calculator-header span {
    display: none;
  }
}