* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #111;
  background: #fcfcfc;
  font-family: Arial, sans-serif;
  line-height: 1.45;
}

.page {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #555;
  font-size: 0.85rem;
  font-weight: 600;
}

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

h1 {
  margin-bottom: 12px;
  font-size: 2.1rem;
  line-height: 1.2;
}

.lede {
  max-width: 760px;
  color: #444;
  margin-bottom: 0;
}

.layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

.panel {
  border: 1px solid #dadada;
  border-radius: 8px;
  padding: 20px;
  background: #fff;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

label {
  display: grid;
  gap: 6px;
}

label span {
  color: #333;
  font-size: 0.92rem;
  font-weight: 600;
}

.field-note {
  color: #666;
  font-size: 0.78rem;
  line-height: 1.35;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  border: 1px solid #cfcfcf;
  border-radius: 6px;
  padding: 9px 11px;
  background: #fff;
  color: #111;
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid #999;
  outline-offset: 2px;
}

.segmented {
  display: inline-flex;
  gap: 6px;
  padding: 0;
  flex-wrap: wrap;
}

.segmented button,
.actions button {
  border: 1px solid #cfcfcf;
  border-radius: 6px;
  cursor: pointer;
}

.segmented button {
  padding: 8px 12px;
  background: #fff;
  color: #333;
  white-space: nowrap;
  display: grid;
  gap: 2px;
  text-align: left;
}

.segmented button.is-active {
  background: #efefef;
  color: #111;
}

.segmented button span {
  display: block;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.2;
}

.segmented button small {
  display: block;
  color: #666;
  font-size: 0.73rem;
  line-height: 1.2;
  white-space: normal;
}

.actions {
  margin-top: 18px;
}

.actions button {
  padding: 10px 14px;
  background: #f4f4f4;
  color: #111;
  font-weight: 600;
}

.mode-block {
  margin-top: 16px;
}

.is-hidden {
  display: none;
}

.results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.card {
  padding: 14px;
  border-radius: 6px;
  background: #fafafa;
  border: 1px solid #e0e0e0;
}

.card h3 {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.value {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.subvalue {
  color: #555;
  font-size: 0.88rem;
  line-height: 1.45;
}

.note,
.derived {
  margin-top: 18px;
  color: #555;
  font-size: 0.88rem;
  line-height: 1.5;
}

.calc-block {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid #e0e0e0;
  font-size: 0.88rem;
  line-height: 1.5;
}

.calc-block strong {
  display: block;
  margin-bottom: 8px;
}

.calc-block ol {
  margin: 0;
  padding-left: 18px;
}

.calc-block li + li {
  margin-top: 6px;
}

.derived {
  padding-top: 14px;
  border-top: 1px solid #e0e0e0;
}

.panel h2 {
  margin-bottom: 6px;
  font-size: 1.25rem;
}

.panel .section-head p {
  margin-bottom: 6px;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .grid,
  .results {
    grid-template-columns: 1fr;
  }

  .section-head {
    flex-direction: column;
  }
}