:root {
  --background: #f8fafc;
  --surface: #ffffff;
  --surface-muted: #f1f5f9;
  --text: #111827;
  --muted: #475569;
  --line: #cbd5e1;
  --line-strong: #94a3b8;
  --accent: #0f2f5f;
  --accent-dark: #0b2447;
  --max-width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.45;
  color: var(--text);
  background: var(--background);
}

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

a {
  color: var(--accent);
}

a:hover {
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
input,
select,
textarea,
.panel,
.calculator-panel,
.result-box,
.data-table,
.data-table th,
.data-table td {
  border-radius: 0 !important;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
}

textarea {
  min-height: 9rem;
  resize: vertical;
}

.container {
  width: min(100% - 24px, var(--max-width));
  margin: 0 auto;
}

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

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.nav-list,
.footer-list,
.panel-list,
.step-list,
.intro-list {
  margin: 0;
  padding-left: 18px;
}

.nav-list,
.footer-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  list-style: none;
  padding: 0;
}

.nav-list a,
.footer-list a {
  color: var(--muted);
  text-decoration: none;
}

.nav-list a:hover,
.footer-list a:hover {
  color: var(--text);
}

.hero {
  padding: 32px 0 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(420px, 1.15fr);
  gap: 32px;
  align-items: start;
}

.hero-copy {
  max-width: 46rem;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--text);
}

h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 14px;
}

h2 {
  font-size: 1.55rem;
  line-height: 1.15;
  margin-bottom: 10px;
}

h3 {
  font-size: 1rem;
  line-height: 1.2;
  margin-bottom: 8px;
}

p {
  margin-top: 0;
  margin-bottom: 12px;
}

.lead {
  max-width: 42rem;
  color: var(--text);
  font-size: 1.02rem;
}

.intro-list li + li,
.panel-list li + li {
  margin-top: 6px;
}

.disclaimer-inline {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.calculator-panel,
.panel,
.note-panel {
  border: 1px solid var(--line);
  background: var(--surface);
}

.calculator-panel {
  align-self: start;
}

.calculator-header {
  border-bottom: 1px solid var(--line);
  padding: 14px 18px;
}

.calculator-header h2 {
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.calculator-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.calculator-body {
  padding: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 18px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-group label {
  font-size: 0.94rem;
  font-weight: 600;
}

.button-full {
  grid-column: 1 / -1;
}

button.primary,
.button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button.primary {
  width: 100%;
}

button.primary:hover,
.button:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.result-box {
  margin-top: 14px;
  border: 1px solid var(--line-strong);
  background: var(--surface-muted);
  padding: 14px;
}

.result-summary {
  margin-bottom: 12px;
}

.result-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
  margin: 0 0 12px;
}

.result-list div {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 10px 12px;
}

.result-list dt {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.result-list dd {
  margin: 0;
  font-weight: 700;
}

.result-block + .result-block {
  margin-top: 12px;
}

.result-block p,
.result-block ul {
  margin-bottom: 0;
}

.section {
  padding: 0 0 28px;
}

.stack > * + * {
  margin-top: 16px;
}

.section-heading p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  max-width: 58rem;
}

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

.data-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: var(--surface);
}

.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.data-table thead th {
  background: #e2e8f0;
  font-size: 0.92rem;
}

.data-table tbody th {
  font-weight: 600;
}

.note-panel,
.panel {
  padding: 14px;
}

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

.note-panel {
  background: #f8fafc;
}

.two-column-list {
  columns: 2;
  column-gap: 28px;
}

.two-column-list li {
  break-inside: avoid;
  margin-bottom: 6px;
}

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

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item p {
  margin-top: 12px;
  margin-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 14px 0 20px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.footer-row p {
  margin: 0;
  color: var(--muted);
}

.page-hero {
  padding: 24px 0 18px;
}

.page-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
}

.page-grid article,
.page-grid .panel {
  height: 100%;
}

.eyebrow,
.section-label,
.panel-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.field-help {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (max-width: 980px) {
  .hero-grid,
  .info-grid,
  .faq-grid,
  .page-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 20px;
  }

  .footer-row,
  .header-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 800px) {
  .hero {
    padding: 24px 0 20px;
  }

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

  .form-grid,
  .result-list {
    grid-template-columns: 1fr;
  }

  .two-column-list {
    columns: 1;
  }
}