.rules-field-guide{max-width:1040px;padding-top:clamp(2rem,6vw,5.5rem);padding-bottom:6rem}
.rules-field-guide .page-kicker{margin:0;text-transform:uppercase;letter-spacing:.15em;font-size:.76rem;font-weight:800}
.rules-hero{display:grid;gap:1rem;padding:clamp(1.4rem,4vw,3rem);border:1px solid #ccd7d0;border-radius:22px;background:linear-gradient(135deg,var(--joy-paper) 0%,var(--joy-garden-haze) 66%,var(--joy-desert) 100%);box-shadow:0 24px 60px rgba(26,52,39,.08)}
.rules-hero .page-kicker{color:#397050}
.rules-hero h1{max-width:900px;margin:0;font-family:"Space Grotesk",Inter,ui-sans-serif,system-ui,sans-serif;font-size:clamp(2.75rem,5.2vw,4.5rem);line-height:.94;letter-spacing:-.055em}
.rules-hero>p{max-width:760px;margin:0;color:#42564b;font-size:clamp(1rem,2vw,1.25rem);line-height:1.6}
.rules-version{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;padding-top:.9rem;border-top:1px solid rgba(45,81,61,.18);color:#597066;font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.68rem;text-transform:uppercase}
.rules-version strong{color:#234b37}
.rules-jump{position:sticky;z-index:8;top:76px;display:flex;gap:.35rem;margin:1rem 0 3rem;padding:.55rem;border:1px solid #d4ddd7;border-radius:14px;background:rgba(255,250,240,.92);box-shadow:0 10px 35px rgba(24,50,37,.07);overflow-x:auto;backdrop-filter:blur(16px)}
.rules-jump a{display:inline-flex;min-height:44px;box-sizing:border-box;flex:0 0 auto;align-items:center;padding:.55rem .72rem;border-radius:9px;color:#43594d;font-size:.72rem;font-weight:800;text-decoration:none}
.rules-jump a:hover{background:#edf4ef;color:#163c29}
.rules-chapter{scroll-margin-top:150px;margin:0 0 4.75rem}
.rules-chapter>header{display:grid;grid-template-columns:52px minmax(0,1fr);gap:1rem;align-items:start;margin-bottom:1.1rem;padding-bottom:1.2rem;border-bottom:2px solid #1f3c2d}
.rules-chapter>header>span{display:grid;width:46px;height:46px;place-items:center;border-radius:50%;background:#1f3c2d;color:#fff;font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.72rem;font-weight:800}
.rules-chapter>header h2{margin:0;font-family:"Space Grotesk",Inter,ui-sans-serif,system-ui,sans-serif;font-size:clamp(2rem,3.4vw,2.75rem);line-height:1;letter-spacing:-.04em}
.rules-chapter details{border-bottom:1px solid #d8dfda}
.rules-chapter summary{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px;padding:1rem .1rem;color:#20352a;font-size:1rem;font-weight:800;cursor:pointer;list-style:none}
.rules-chapter summary::-webkit-details-marker{display:none}
.rules-chapter summary::after{display:grid;flex:0 0 28px;width:28px;height:28px;place-items:center;border:1px solid #c8d2cb;border-radius:50%;color:#50705e;content:"+";font-size:1.1rem}
.rules-chapter details[open] summary::after{content:"−"}
.rules-chapter details>div{max-width:800px;padding:0 3.2rem 1.6rem 0;color:#48594f;font-size:.94rem;line-height:1.72}
.rules-chapter details p{margin:.5rem 0 1rem}
.rules-chapter details ul{display:grid;gap:.55rem;margin:.7rem 0 1rem;padding-left:1.2rem}
.rules-chapter details blockquote{margin:.5rem 0 1.2rem;padding:1.2rem 1.4rem;border-left:4px solid #438063;border-radius:0 12px 12px 0;background:#edf6f0;color:#193827;font-family:"Space Grotesk",Inter,ui-sans-serif,system-ui,sans-serif;font-size:clamp(1.2rem,3vw,1.75rem);font-weight:800;line-height:1.25}
.rules-chapter a{font-weight:800;text-underline-offset:.2em}
.rules-legal>header{border-color:#53412d}
.rules-legal>header>span{background:#53412d}
.rules-legal details[open]{background:linear-gradient(90deg,rgba(244,238,226,.55),transparent)}

@media(max-width:700px){
  .rules-field-guide{padding-top:1rem}
  .rules-hero{border-radius:16px}
  .rules-hero h1{font-size:clamp(2.25rem,11vw,3.4rem);line-height:.95}
  .page-family .rules-jump{top:calc(72px + env(safe-area-inset-top));margin-bottom:2.5rem}
  .page-family .rules-chapter{scroll-margin-top:calc(158px + env(safe-area-inset-top))}
  .rules-jump a{font-size:.75rem}
  .rules-chapter{margin-bottom:3.6rem}
  .rules-chapter>header{grid-template-columns:40px minmax(0,1fr);gap:.75rem}
  .rules-chapter>header>span{width:38px;height:38px}
  .rules-chapter details>div{padding-right:.2rem}
  .rules-chapter summary{font-size:.94rem}
}