:root {
  --paper: #f7f6f1;
  --surface: #ffffff;
  --ink: #1f2826;
  --muted: #65716d;
  --line: #d9dfd8;
  --teal: #2f7f78;
  --green: #547d4e;
  --red: #d25b50;
  --amber: #b88738;
  --blue: #3b6f92;
  --shadow: 0 12px 32px rgba(31, 40, 38, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.header-content,
.content-grid,
.results-band {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.header-content {
  min-height: 232px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  gap: 32px;
  align-items: center;
  padding: 28px 0 20px;
}

.brand-block {
  display: flex;
  gap: 20px;
  align-items: center;
}

.brand-mark {
  width: 92px;
  height: 92px;
  object-fit: contain;
  flex: 0 0 auto;
}

.head-image {
  justify-self: end;
  max-height: 210px;
  object-fit: contain;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 10px;
  font-size: 2.35rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: 1.45rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.intro {
  max-width: 700px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.input-band {
  background: #fbfcf9;
  border-bottom: 1px solid var(--line);
}

.content-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.55fr;
  gap: 26px;
  padding: 28px 0;
}

.input-copy {
  align-self: start;
  padding-top: 4px;
}

.input-copy p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.procedure-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.procedure-card {
  appearance: none;
  min-height: 154px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  overflow: hidden;
  padding: 0;
  text-align: left;
  box-shadow: 0 1px 1px rgba(31, 40, 38, 0.04);
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.procedure-card:hover {
  border-color: rgba(47, 127, 120, 0.55);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.procedure-card:focus-visible,
.tab:focus-visible,
.choice-group input:focus-visible + span,
.number-field input:focus-visible {
  outline: 3px solid rgba(210, 91, 80, 0.25);
  outline-offset: 2px;
}

.procedure-card.is-selected {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(47, 127, 120, 0.16);
}

.procedure-card img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.procedure-card span {
  display: block;
  padding: 12px 14px 14px;
  font-weight: 800;
}

.controls-grid {
  grid-column: 2;
  display: grid;
  grid-template-columns: minmax(180px, 0.72fr) minmax(170px, 0.82fr) minmax(220px, 1fr);
  gap: 14px;
}

.number-field,
.choice-group {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 16px;
}

.number-field span,
.choice-group legend {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
}

.number-field {
  display: grid;
  gap: 12px;
  align-content: start;
}

.number-field input {
  width: 100%;
  border: 1px solid #cbd4cd;
  border-radius: 7px;
  background: #fbfcf9;
  color: var(--ink);
  padding: 10px 12px;
}

.choice-group {
  display: grid;
  gap: 8px;
}

.choice-group legend {
  padding: 0;
  margin-bottom: 10px;
}

.choice-group label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.92rem;
}

.choice-group input {
  margin-top: 3px;
  accent-color: var(--teal);
}

.choice-group label:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.48;
}

.choice-group label:has(input:checked) span {
  color: var(--ink);
  font-weight: 750;
}

.results-band {
  padding: 26px 0 48px;
}

.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.tab {
  appearance: none;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 11px 15px;
  font-weight: 800;
}

.tab:hover {
  color: var(--teal);
}

.tab.is-active {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
  box-shadow: 0 -1px 0 var(--surface) inset;
}

.tab-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 0;
  padding: 24px;
}

.tab-panel[hidden] {
  display: none;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
  margin-bottom: 18px;
}

.panel-heading h2 {
  margin-bottom: 0;
}

.dose-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.dose-item {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fbfcf9;
}

.dose-item h3 {
  margin: 0 0 10px;
  font-size: 0.96rem;
  letter-spacing: 0;
}

.dose-value {
  color: var(--teal);
  font-size: 1.16rem;
  font-weight: 850;
  line-height: 1.28;
}

.dose-range {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.note {
  max-width: 880px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.image-frame {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcf9;
  overflow: hidden;
}

.image-frame[hidden] {
  display: none;
}

.image-frame img {
  width: 100%;
  height: 280px;
  object-fit: contain;
  background: #ffffff;
}

#doseMap3d {
  background: #050505;
}

.image-frame figcaption {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
  padding: 10px 12px;
}

.chart {
  display: grid;
  gap: 14px;
}

.chart-row {
  display: grid;
  grid-template-columns: minmax(150px, 220px) minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
}

.chart-label {
  color: var(--ink);
  font-weight: 800;
}

.chart-track {
  height: 34px;
  border-radius: 8px;
  background: #eef1ed;
  overflow: hidden;
}

.chart-bar {
  min-width: 0;
  height: 100%;
  border-radius: 8px;
  background: var(--red);
}

.chart-row:nth-child(2) .chart-bar {
  background: var(--amber);
}

.chart-row:nth-child(3) .chart-bar {
  background: var(--blue);
}

.chart-row:nth-child(4) .chart-bar {
  background: var(--green);
}

.chart-value {
  min-width: 72px;
  color: var(--muted);
  font-weight: 750;
  text-align: right;
}

.info-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
}

.reference-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.reference-list li + li {
  margin-top: 8px;
}

@media (max-width: 980px) {
  .header-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .head-image {
    justify-self: start;
    max-height: 160px;
  }

  .content-grid,
  .controls-grid,
  .info-layout {
    grid-template-columns: 1fr;
  }

  .controls-grid {
    grid-column: auto;
  }

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

@media (max-width: 680px) {
  .header-content,
  .content-grid,
  .results-band {
    width: min(100% - 20px, 1180px);
  }

  .header-content {
    padding-top: 22px;
  }

  .brand-block {
    align-items: flex-start;
  }

  .brand-mark {
    width: 58px;
    height: 58px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.22rem;
  }

  .head-image {
    display: none;
  }

  .procedure-grid,
  .dose-grid,
  .map-grid {
    grid-template-columns: 1fr;
  }

  .procedure-card {
    min-height: auto;
  }

  .tab {
    flex: 1 1 46%;
    padding: 10px 9px;
  }

  .tab-panel {
    padding: 18px 14px;
  }

  .panel-heading {
    display: block;
  }

  .chart-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .chart-value {
    min-width: 0;
    text-align: left;
  }
}