:root {
  --bg: #f7f3ee;
  --bg-hero: linear-gradient(165deg, #fff8f1 0%, #f0e6dc 45%, #e8d5c4 100%);
  --ink: #1c1410;
  --muted: #5c4f45;
  --brand: #c45c16;
  --brand-ink: #FFFAF5;
  --line: #d9cfc4;
  --card: rgba(255, 250, 245, 0.72);
  --focus: #0b57d0;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--brand);
  text-underline-offset: 0.15em;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--brand);
  color: var(--brand-ink);
  padding: 0.5rem 0.75rem;
  z-index: 100;
  border-radius: 0.35rem;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(247, 243, 238, 0.9);
  border-bottom: 1px solid var(--line);
}

.site-nav {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  font-size: 0.95rem;
}

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

.nav-links a:hover {
  color: var(--ink);
}

.site-main {
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.hero {
  background: var(--bg-hero);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 2rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand);
}

.hero h1,
.prose > h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lede {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 42rem;
}

.section {
  margin: 2.5rem 0;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.steps {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.steps li {
  margin-bottom: 0.65rem;
}

.feature-list,
.link-cards {
  padding-left: 1.2rem;
}

.feature-list li,
.link-cards li {
  margin-bottom: 0.55rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.55rem 1.1rem;
  border-radius: 0.55rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
}

.btn-primary {
  background: var(--brand);
  color: var(--brand-ink);
}

.btn-primary:hover {
  filter: brightness(0.95);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  padding: 0;
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--line);
}

.prose {
  max-width: 46rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.5rem 0.65rem;
  text-align: left;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--card);
  padding: 0.1em 0.35em;
  border-radius: 0.3rem;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.65rem;
  background: var(--card);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
}

.calc-form {
  display: grid;
  gap: 1rem;
  max-width: 24rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--card);
  margin: 1.5rem 0;
}

.calc-form .field label,
.calc-form legend {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.calc-form input[type='number'] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  font: inherit;
  background: #fff;
}

.calc-form fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

.calc-form .radio {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-right: 1rem;
  font-weight: 500;
}

.calc-result {
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--brand);
  background: var(--card);
  border-radius: 0 0.65rem 0.65rem 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 1.25rem 3rem;
  max-width: 68rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer a {
  color: var(--muted);
}

@media (max-width: 640px) {
  .nav-links a:not(.btn) {
    display: none;
  }
}