:root {
  --bg: #f1efe8;
  --panel: #fffdf8;
  --panel-strong: #f7f2e8;
  --ink: #1c2430;
  --muted: #5f6875;
  --line: #d8cfbf;
  --accent: #0b6aa7;
  --accent-strong: #084f7d;
  --tab: #e7dcc8;
  --shadow: 0 20px 40px rgba(28, 36, 48, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(11, 106, 167, 0.12), transparent 30%),
    linear-gradient(180deg, #f8f5ee 0%, var(--bg) 100%);
}

.page {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 72px;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow,
.panel-kicker,
.meta-label,
.results-grid span {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
  color: var(--muted);
}

h1,
h2 {
  margin: 0;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: 0.95;
  margin-top: 8px;
}

.lede {
  max-width: 72ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.calculator-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 20px;
}

.dome-list,
.calculator-panel {
  background: var(--panel);
  border: 1px solid rgba(216, 207, 191, 0.9);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.dome-list {
  padding: 20px;
  align-self: start;
  position: sticky;
  top: 20px;
}

.dome-list h2 {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.tab-list {
  display: grid;
  gap: 10px;
}

.tab-button {
  border: 1px solid transparent;
  background: var(--tab);
  color: var(--ink);
  border-radius: 14px;
  padding: 12px 14px;
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: background-color 120ms ease, transform 120ms ease, border-color 120ms ease;
}

.tab-button:hover,
.tab-button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  outline: none;
}

.tab-button.active {
  background: var(--accent);
  color: white;
}

.calculator-panel {
  padding: 24px;
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 18px;
  align-items: center;
  padding: 16px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(11, 106, 167, 0.08), rgba(255, 255, 255, 0) 55%),
    var(--panel-strong);
}

.hero-label {
  margin: 0 0 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
  color: var(--muted);
}

.hero-description {
  margin: 0;
  color: var(--muted);
  max-width: 44ch;
}

.dome-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: 16px;
  display: block;
  background: #ddd6c8;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 20px;
}

.hub-note {
  max-width: 28ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.controls {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(180px, 240px) minmax(220px, 1fr) minmax(160px, 220px) auto;
  gap: 14px;
  align-items: end;
  margin-bottom: 20px;
}

.controls label {
  display: grid;
  gap: 8px;
}

.controls span {
  font-size: 0.9rem;
  color: var(--muted);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  align-self: center;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-strong);
  padding: 12px 14px;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
}

select,
input,
button {
  font: inherit;
}

select,
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
  color: var(--ink);
  padding: 12px 14px;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.unit-badge {
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--muted);
}

button {
  border: none;
  border-radius: 14px;
  padding: 13px 20px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: var(--accent-strong);
  outline: none;
}

.meta-grid,
.results-grid {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

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

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

.meta-grid article,
.results-grid article {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
  padding: 14px 16px;
  display: grid;
  gap: 8px;
}

.meta-grid strong,
.results-grid strong {
  font-size: 1.15rem;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

thead th {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

tbody tr:last-child td {
  border-bottom: none;
}

.color-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.color-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.15);
}

@media (max-width: 920px) {
  .calculator-shell {
    grid-template-columns: 1fr;
  }

  .dome-list {
    position: static;
  }

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

  .hero-card {
    grid-template-columns: 1fr;
  }

  .panel-header {
    flex-direction: column;
    align-items: start;
  }
}