:root {
  --paper: #f6f1e7;
  --paper-card: #fffaf1;
  --ink: #221f1b;
  --ink-soft: #6b6459;
  --rust: #b5482f;
  --moss: #5b7259;
  --gold: #c9a227;
  --border: #d9d0c2;
  --shadow: 0 18px 50px rgba(58, 48, 36, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(99, 83, 60, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 83, 60, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
  font-family: "Inter", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a { color: inherit; }

a:focus-visible {
  outline: 3px solid rgba(181, 72, 47, 0.35);
  outline-offset: 4px;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  width: min(1180px, calc(100% - 48px));
  min-height: 92px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  flex: 0 0 auto;
  color: var(--ink);
  background: transparent;
  border: 2px solid currentColor;
  border-radius: 50%;
  transform: rotate(-7deg);
  font: 700 1.05rem/1 "Fraunces", Georgia, serif;
}

.brand-name {
  display: block;
  font: 700 1.25rem/1.1 "Fraunces", Georgia, serif;
  font-variation-settings: "opsz" 9;
  letter-spacing: -0.015em;
}

.brand-meta {
  display: block;
  margin-top: 2px;
  color: var(--ink-soft);
  font: 600 0.68rem/1 "JetBrains Mono", monospace;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
}

.site-nav a {
  color: var(--ink);
  font: 600 0.82rem/1 "JetBrains Mono", monospace;
  letter-spacing: 0.025em;
  text-underline-offset: 5px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--rust); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 38px 0 0;
  color: var(--ink-soft);
  font: 500 0.71rem/1.4 "JetBrains Mono", monospace;
}

.breadcrumb a { text-decoration-color: rgba(107, 100, 89, 0.45); }

.guide-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: clamp(40px, 8vw, 100px);
  align-items: end;
  padding: 70px 0 76px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 15px;
  color: var(--rust);
  font: 600 0.7rem/1.3 "JetBrains Mono", monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: "Fraunces", Georgia, serif;
  font-variation-settings: "opsz" 9;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(3.1rem, 8vw, 6.7rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.lede {
  max-width: 740px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.7vw, 1.2rem);
  line-height: 1.75;
}

.guide-stamp {
  padding: 24px;
  background: var(--paper-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transform: rotate(2deg);
}

.guide-stamp strong {
  display: block;
  font: 600 1.8rem/1.15 "Fraunces", Georgia, serif;
  font-variation-settings: "opsz" 9;
}

.guide-stamp span {
  display: block;
  margin-top: 10px;
  color: var(--ink-soft);
  font: 500 0.7rem/1.55 "JetBrains Mono", monospace;
  text-transform: uppercase;
}

.quick-answer {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 30px;
  padding: 34px 38px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
}

.quick-answer h2 {
  margin: 0;
  color: #f5c75e;
  font-size: 1.35rem;
  font-weight: 600;
}

.quick-answer p { margin: 0; font-size: 1.03rem; }

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: clamp(50px, 8vw, 96px);
  align-items: start;
  padding-block: 92px;
}

.guide-content { min-width: 0; }

.guide-content > section + section {
  margin-top: 82px;
  padding-top: 74px;
  border-top: 1px solid var(--border);
}

.guide-content h2 {
  max-width: 760px;
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

.section-intro {
  max-width: 720px;
  margin: 0 0 34px;
  color: var(--ink-soft);
}

.steps {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: guide-step;
}

.steps li {
  counter-increment: guide-step;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 22px;
  padding: 26px;
  background: var(--paper-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.steps li::before {
  content: counter(guide-step, decimal-leading-zero);
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: white;
  background: var(--rust);
  border-radius: 50%;
  font: 600 0.75rem/1 "JetBrains Mono", monospace;
}

.steps h3 {
  margin: 2px 0 7px;
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.25;
}

.steps p { margin: 0; color: var(--ink-soft); }

code {
  padding: 0.12em 0.36em;
  background: rgba(91, 114, 89, 0.12);
  border-radius: 4px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88em;
}

.note {
  margin-top: 24px;
  padding: 20px 22px;
  background: rgba(201, 162, 39, 0.12);
  border-left: 4px solid var(--gold);
}

.note > strong:first-child { display: block; margin-bottom: 4px; }

.size-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper-card);
  border: 1px solid var(--border);
}

.size-table th,
.size-table td {
  padding: 16px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.size-table th {
  background: rgba(91, 114, 89, 0.09);
  font: 600 0.7rem/1.4 "JetBrains Mono", monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

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

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

.trouble-card {
  padding: 22px;
  background: var(--paper-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.trouble-card h3 { margin: 0 0 7px; font-size: 1.2rem; }
.trouble-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

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

.faq-list details {
  padding: 18px 20px;
  background: var(--paper-card);
  border: 1px solid var(--border);
  border-radius: 8px;
}

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

.faq-list p { margin: 10px 0 0; color: var(--ink-soft); }

.guide-nav {
  position: sticky;
  top: 28px;
  padding: 22px;
  background: rgba(255, 250, 241, 0.86);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.guide-nav strong {
  display: block;
  margin-bottom: 14px;
  font: 600 0.7rem/1 "JetBrains Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guide-nav a {
  display: block;
  padding: 9px 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 208, 194, 0.7);
}

.guide-nav a:hover { color: var(--rust); }

.source-note {
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.source-note a { text-decoration-color: rgba(107, 100, 89, 0.45); }

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
  margin-bottom: 86px;
  padding: clamp(30px, 6vw, 58px);
  color: var(--paper);
  background: var(--moss);
  border-radius: 6px;
}

.cta h2 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1;
}

.cta p { margin: 0; color: rgba(255, 250, 241, 0.82); }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  color: var(--ink);
  background: var(--paper);
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 34px;
  color: var(--ink-soft);
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
}

.site-footer a { text-decoration-color: rgba(107, 100, 89, 0.4); }

@media (max-width: 840px) {
  .guide-hero,
  .guide-layout { grid-template-columns: 1fr; }
  .guide-stamp { max-width: 330px; }
  .guide-nav { position: static; order: -1; }
  .guide-nav strong { margin-bottom: 8px; }
  .guide-nav a { display: inline-block; margin-right: 14px; border: 0; }
  .cta { grid-template-columns: 1fr; justify-items: start; }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 1120px); }
  .site-header { width: min(100% - 28px, 1180px); align-items: center; }
  .site-nav { gap: 15px; }
  .site-nav a { font-size: 0.72rem; }
  .guide-hero { padding: 52px 0 58px; }
  h1 { font-size: clamp(3rem, 17vw, 4.8rem); }
  .quick-answer { grid-template-columns: 1fr; padding: 28px; }
  .guide-layout { padding-block: 68px; }
  .steps li { grid-template-columns: 1fr; }
  .troubleshooting { grid-template-columns: 1fr; }
  .size-table { display: block; overflow-x: auto; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  .site-nav { gap: 11px; }
  .site-nav a:first-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}