:root {
  --navy-950: #e0e0db;
  --navy-900: #e7e7e2;
  --navy-800: #f7f7f2;
  --navy-700: #253551;
  --line: #c4c6bd;
  --text: #111820;
  --muted: #59616c;
  --teal: #253551;
  --teal-dark: #1d2a43;
  --amber: #bf7a18;
  --coral: #b75043;
  --green: #3f7f3b;
  --shadow: 0 18px 46px rgba(31, 42, 62, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--navy-950);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--navy-950);
  color: var(--text);
  font-family: Roboto, Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid rgba(37, 53, 81, 0.12);
  background: rgba(224, 224, 219, 0.94);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.brand-link {
  color: var(--text);
  display: inline-block;
  font-size: 24px;
  font-weight: 800;
  text-decoration: none;
}

.page-kicker {
  color: var(--teal);
  margin: 1px 0 0;
  font-size: 13px;
  font-weight: 700;
}

.quick-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.quick-links a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid rgba(37, 53, 81, 0.16);
  padding: 7px 10px;
  border-radius: 8px;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.quick-links a:hover,
.quick-links a:focus-visible {
  color: var(--teal);
  border-color: rgba(37, 53, 81, 0.36);
  background: rgba(37, 53, 81, 0.06);
}

.wizard-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 28px auto 44px;
  display: grid;
  gap: 18px;
}

.tool-heading,
.panel,
.site-footer {
  border: 1px solid rgba(37, 53, 81, 0.13);
  background: rgba(255, 255, 255, 0.70);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tool-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
}

.heading-actions {
  display: grid;
  justify-items: end;
  gap: 10px;
}

.tool-heading h1,
.panel h2 {
  margin: 0;
}

.tool-heading h1 {
  font-size: 34px;
  line-height: 1.1;
}

.tool-heading p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 740px;
}

.data-pill,
.step-label,
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  color: #ffffff;
  background: var(--teal);
  white-space: nowrap;
}

.data-pill.warning,
.pill.warning {
  background: var(--amber);
  color: #241804;
}

.data-pill.error,
.pill.error {
  background: var(--coral);
  color: #260701;
}

.panel {
  padding: 22px;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.step-label {
  margin-bottom: 8px;
  background: rgba(37, 53, 81, 0.08);
  border: 1px solid rgba(37, 53, 81, 0.18);
  color: var(--teal);
}

.form-grid {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

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

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

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

.field {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid rgba(37, 53, 81, 0.18);
  background: #ffffff;
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}

.field input:focus,
.field select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(37, 53, 81, 0.12);
}

.field.field-disabled {
  color: #858b86;
}

.field.field-disabled select,
.field input:disabled,
.field select:disabled {
  background: #e7e8e3;
  border-color: rgba(37, 53, 81, 0.10);
  color: #858b86;
  cursor: not-allowed;
  opacity: 1;
}

.action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.primary-button,
.secondary-button,
.use-button {
  min-height: 42px;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 120ms ease, background 160ms ease, border-color 160ms ease;
}

.primary-button,
.use-button {
  background: var(--teal);
  color: #ffffff;
}

.secondary-button {
  background: #ffffff;
  color: var(--teal);
  border: 1px solid rgba(37, 53, 81, 0.18);
}

.primary-button:hover,
.secondary-button:hover,
.use-button:hover {
  transform: translateY(-1px);
}

.secondary-button:hover {
  border-color: rgba(37, 53, 81, 0.42);
}

.manual-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.manual-toggle::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #a4a8a5;
  box-shadow: inset 0 0 0 1px rgba(37, 53, 81, 0.18);
}

.manual-toggle.manual-active {
  background: var(--teal);
  color: #ffffff;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(37, 53, 81, 0.12);
}

.manual-toggle.manual-active::before {
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.22);
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  background: rgba(37, 53, 81, 0.06);
  border: 1px solid rgba(37, 53, 81, 0.14);
  border-radius: 8px;
  padding: 6px;
}

.segmented-control.compact {
  max-width: 460px;
}

.unit-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(94px, 1fr));
  gap: 6px;
  width: min(100%, 220px);
  background: rgba(37, 53, 81, 0.06);
  border: 1px solid rgba(37, 53, 81, 0.14);
  border-radius: 8px;
  padding: 5px;
}

.unit-toggle .segment-button {
  min-height: 36px;
  padding: 7px 10px;
}

.segment-button {
  min-height: 44px;
  border-radius: 8px;
  padding: 10px 12px;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
  cursor: pointer;
}

.segment-button.active {
  background: var(--teal);
  color: #ffffff;
}

.manual-panel,
.backing-fields {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(37, 53, 81, 0.14);
  border-radius: 8px;
  background: rgba(37, 53, 81, 0.04);
}

.summary-strip,
.empty-state,
.result-box {
  margin-top: 16px;
  border: 1px solid rgba(37, 53, 81, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  padding: 14px;
  color: var(--muted);
}

.summary-strip strong,
.result-box strong {
  color: var(--text);
}

.selected-card {
  border-color: rgba(37, 53, 81, 0.24);
}

.selected-card-head,
.setup-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.selected-card-head strong,
.setup-card-head h3 {
  display: block;
}

.eyebrow {
  display: block;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 2px;
}

.selected-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.selected-card-grid div {
  background: rgba(37, 53, 81, 0.06);
  border-radius: 8px;
  padding: 10px;
}

.selected-card-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.selected-card-grid strong {
  display: block;
  margin-top: 3px;
  font-size: 14px;
}

.warning-box {
  border-color: rgba(191, 122, 24, 0.45);
  color: #6d450c;
  background: rgba(191, 122, 24, 0.10);
}

.error-box {
  border-color: rgba(183, 80, 67, 0.45);
  color: #7c312a;
  background: rgba(183, 80, 67, 0.10);
}

.recommendation-grid,
.line-group-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.setup-card,
.line-card {
  border: 1px solid rgba(37, 53, 81, 0.13);
  border-radius: 8px;
  background: #ffffff;
  padding: 16px;
}

.setup-card.best-pick {
  border-color: rgba(37, 53, 81, 0.46);
  box-shadow: inset 0 0 0 1px rgba(37, 53, 81, 0.10);
}

.setup-card.selected {
  background: rgba(37, 53, 81, 0.06);
}

.setup-card h3,
.line-card h3,
.line-group h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.setup-headline {
  font-size: 16px;
}

.setup-card p,
.line-card p {
  margin: 8px 0;
  color: var(--muted);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.pill.subtle {
  color: var(--text);
  background: rgba(37, 53, 81, 0.07);
  border: 1px solid rgba(37, 53, 81, 0.12);
}

.pill.best {
  background: var(--teal);
  color: #ffffff;
}

.capacity-result {
  display: grid;
  gap: 14px;
}

.capacity-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(37, 53, 81, 0.12);
}

.capacity-hero p {
  margin: 5px 0 0;
  color: var(--muted);
}

.capacity-number {
  display: block;
  color: var(--text);
  font-size: 34px;
  line-height: 1.1;
  margin-top: 2px;
}

.capacity-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.capacity-detail-card {
  background: rgba(37, 53, 81, 0.06);
  border-radius: 8px;
  padding: 13px;
}

.capacity-detail-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.capacity-detail-card strong {
  display: block;
  margin-top: 3px;
}

.capacity-detail-card p,
.estimate-note p {
  margin: 6px 0 0;
  color: var(--muted);
}

.estimate-note {
  border-left: 3px solid var(--teal);
  background: rgba(37, 53, 81, 0.06);
  border-radius: 8px;
  padding: 12px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.metric-tile {
  border-left: 3px solid var(--teal);
  background: rgba(37, 53, 81, 0.06);
  border-radius: 8px;
  padding: 12px;
}

.metric-tile span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.metric-tile strong {
  display: block;
  font-size: 20px;
  margin-top: 3px;
}

.slider-row {
  display: grid;
  grid-template-columns: minmax(160px, 260px) minmax(0, 1fr);
  gap: 14px;
  align-items: end;
  margin-top: 14px;
}

.range {
  width: 100%;
  accent-color: var(--teal);
  min-height: 44px;
}

.spool-bar {
  display: grid;
  grid-template-columns: var(--backing-width, 0%) var(--main-width, 100%) var(--empty-width, 0%);
  min-height: 34px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(37, 53, 81, 0.16);
  margin: 16px 0 8px;
  background: rgba(37, 53, 81, 0.08);
}

.spool-backing {
  background: linear-gradient(90deg, #8d948f, #b0b5ae);
}

.spool-main {
  background: linear-gradient(90deg, var(--teal-dark), var(--teal));
}

.spool-empty {
  background: rgba(37, 53, 81, 0.08);
}

.tiny-note {
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
}

.line-group {
  margin-top: 16px;
}

.hidden {
  display: none !important;
}

.site-footer {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto 32px;
  padding: 18px 22px;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .site-header,
  .tool-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .quick-links {
    justify-content: flex-start;
  }

  .heading-actions {
    justify-items: start;
    width: 100%;
  }

  .form-grid.two,
  .form-grid.three,
  .form-grid.four,
  .recommendation-grid,
  .line-group-grid,
  .result-grid,
  .capacity-detail-grid,
  .selected-card-grid,
  .slider-row {
    grid-template-columns: 1fr;
  }

  .capacity-hero {
    flex-direction: column;
  }

  .segmented-control {
    grid-template-columns: 1fr;
  }

  .tool-heading h1 {
    font-size: 30px;
  }
}

@media (max-width: 520px) {
  .wizard-shell,
  .site-footer {
    width: min(100% - 20px, 1160px);
  }

  .panel,
  .tool-heading {
    padding: 16px;
  }

  .quick-links a {
    width: 100%;
  }
}