:root {
  color-scheme: light;
  --ink: #111b38;
  --ink-soft: #1b294e;
  --muted: #62708a;
  --line: #e4d7a8;
  --paper: #fff9df;
  --paper-strong: #fff2b8;
  --white: #ffffff;
  --yellow: #ffd04d;
  --yellow-dark: #a87400;
  --blue: #3659d9;
  --green: #16885b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

.skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--yellow);
  color: var(--ink);
  font-weight: 800;
}

.skip-link:focus {
  top: 12px;
}

.site-nav {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px clamp(16px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 17px;
  font-weight: 860;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  font-weight: 780;
}

.site-nav-links a {
  text-decoration: none;
}

.site-nav-links a:hover,
.site-nav-links a:focus-visible {
  color: var(--yellow-dark);
}

.nav-cta {
  padding: 9px 13px;
  border-radius: 7px;
  background: var(--ink);
  color: var(--yellow);
}

.breadcrumbs {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  margin-right: 8px;
  content: "/";
}

.guide-hero {
  padding: 46px clamp(20px, 6vw, 78px) 58px;
}

.guide-hero-inner {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.guide-kicker {
  margin: 0 0 14px;
  color: var(--yellow-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(36px, 6.5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.hero-lead {
  max-width: 800px;
  margin: 22px 0 0;
  color: #34415c;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 7px;
  text-decoration: none;
  font-weight: 850;
}

.button.primary {
  border-color: var(--yellow);
  background: var(--yellow);
}

.button.secondary {
  background: var(--white);
}

.guide-main {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 78px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 0.33fr);
  gap: 42px;
  align-items: start;
}

.prose section + section {
  margin-top: 48px;
}

.prose h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.prose h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

.prose p,
.prose li {
  color: #34415c;
  font-size: 16px;
  line-height: 1.85;
}

.prose ul,
.prose ol {
  padding-left: 24px;
}

.answer-box,
.note-box,
.source-box,
.side-card,
.card {
  border: 1px solid var(--line);
  border-radius: 9px;
}

.answer-box {
  margin-bottom: 44px;
  padding: 24px;
  border-left: 6px solid var(--yellow);
  background: var(--paper);
}

.answer-box strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.answer-box p {
  margin: 0;
}

.note-box {
  margin: 22px 0;
  padding: 20px;
  background: #f4f7ff;
}

.note-box.warning {
  border-color: #efce7a;
  background: #fff8df;
}

.note-box p {
  margin: 0;
}

.source-box {
  padding: 22px;
  background: #fbfcff;
}

.source-box h2 {
  font-size: 24px;
}

.source-box ul {
  margin-bottom: 0;
}

.source-box a,
.prose a {
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.updated {
  color: var(--muted);
  font-size: 13px;
}

.side-card {
  position: sticky;
  top: 92px;
  padding: 22px;
  background: var(--ink);
  color: var(--white);
}

.side-card h2 {
  margin: 0 0 12px;
  color: var(--yellow);
  font-size: 20px;
}

.side-card p,
.side-card li {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.65;
}

.side-card ul {
  margin: 14px 0 20px;
  padding-left: 20px;
}

.side-card .button {
  width: 100%;
  border-color: var(--yellow);
  background: var(--yellow);
  color: var(--ink);
}

.comparison {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.comparison th,
.comparison td {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}

.comparison th {
  background: var(--paper);
}

.comparison tr:last-child td {
  border-bottom: 0;
}

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

.card {
  display: flex;
  min-height: 220px;
  flex-direction: column;
  padding: 24px;
  background: var(--white);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(17, 27, 56, 0.1);
}

.card-label {
  color: var(--yellow-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card h2,
.card h3 {
  margin: 14px 0 10px;
  font-size: 24px;
  line-height: 1.3;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.card-more {
  margin-top: auto;
  padding-top: 18px;
  color: var(--blue);
  font-weight: 850;
}

.cta-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  margin-top: 54px;
  padding: 28px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--white);
}

.cta-band h2 {
  margin: 0 0 8px;
  color: var(--yellow);
  font-size: 26px;
}

.cta-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.65;
}

.cta-band .button {
  border-color: var(--yellow);
  background: var(--yellow);
  color: var(--ink);
  white-space: nowrap;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 6vw, 78px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer a {
  text-underline-offset: 3px;
}

@media (max-width: 820px) {
  .site-nav-links a:not(.nav-cta) {
    display: none;
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

  .side-card {
    position: static;
  }

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

  .cta-band {
    grid-template-columns: 1fr;
  }

  .cta-band .button {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .brand span {
    display: none;
  }

  .site-nav {
    min-height: 62px;
  }

  .guide-hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 40px;
  }

  .comparison {
    display: block;
    overflow-x: auto;
  }
}