.guide-intro { padding-bottom: 28px; }
.guide-copy-heading { font-size: 20px; margin-bottom: 16px; }
.guide-check-link { margin: -14px 0 32px; font-size: 14px; }
.guide-intro h1 { font-size: clamp(34px, 4vw, 54px); line-height: 1.1; letter-spacing: -1.5px; }
.guide-byline { margin-top: 16px; color: var(--muted); font-size: 13px; }
.guide-copy-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.guide-copy-card { min-width: 0; padding: 24px; border: 1px solid #dce3ee; border-radius: 18px; background: white; box-shadow: 0 5px 16px rgba(35, 53, 89, .05); }
.guide-copy-card:first-child { border-color: var(--blue); box-shadow: inset 0 4px 0 var(--blue), var(--shadow-sm); }
.guide-copy-card h3 { margin: 6px 0 10px; font-size: 22px; }
.guide-copy-card p { color: var(--muted); font-size: 15px; line-height: 1.6; }
.guide-copy-card .button { margin-top: 18px; }
.guide-manual { margin-top: 18px; }
.guide-manual label { display: block; font-size: 13px; margin-bottom: 6px; }
.guide-manual input { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; background: #F7F8FA; font: 18px ui-monospace, monospace; }
.guide-manual button { margin-top: 8px; }
.guide-copy-card [role="status"] { min-height: 48px; margin-top: 12px; font-size: 13px; }
.guide-evidence { margin: 18px 0 32px; padding-left: 16px; border-left: 3px solid #CBD2DA; color: var(--muted); font-size: 14px; line-height: 1.7; max-width: 85ch; }
.guide-check { margin: 24px 0 40px; padding: 24px; border: 1px solid #d7deeb; border-radius: 20px; background: linear-gradient(135deg, #fff, #f5f8ff); box-shadow: var(--shadow-sm); }
.guide-check h2 { font-size: 21px; margin-bottom: 12px; }
.guide-check textarea { min-height: 80px; margin-top: 8px; }
.guide-check p { line-height: 1.65; color: var(--muted); font-size: 14px; }
.guide-check [role="status"] { overflow-wrap: anywhere; margin: 12px 0; }
.guide-content { min-width: 0; }
.guide-content ol { margin: 16px 0; padding-left: 24px; }
.guide-content ol li { padding-left: 6px; margin: 12px 0; }
.guide-content strong { color: var(--ink); }
.guide-content .diagram-scroll img { min-width: 0; }
.guide-symptoms { margin-top: 20px; }
.guide-symptoms > div { padding: 16px 0; border-top: 1px solid var(--line); }
.guide-symptoms dt { font-weight: 650; }
.guide-symptoms dd { margin: 8px 0 0; color: var(--muted); line-height: 1.65; }
.guide-content details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.guide-content summary { cursor: pointer; font-weight: 650; line-height: 1.5; }
.guide-source-list { overflow-wrap: anywhere; font-size: 14px; }
@media (max-width: 640px) {
  .guide-copy-grid { grid-template-columns: 1fr; gap: 14px; }
  .guide-copy-card, .guide-check { padding: 18px; }
  .guide-intro h1 { letter-spacing: -1px; }
}