/* CaveArc Studio: paper, ink, workwear blue. No external assets. */
:root{color-scheme:light;--paper:#faf7f2;--ink:#1a1a1a;--accent:#1e3a5f;--muted:#56524b;--rule:#c8c2b8}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:17px;line-height:1.65;overflow-wrap:anywhere}
a{color:var(--accent);text-underline-offset:.2em}
a:hover{text-decoration-thickness:2px}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
.wrap{max-width:840px;margin-inline:auto;padding-inline:clamp(20px,5vw,44px)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-block:24px;border-bottom:1px solid var(--rule)}
.brand{font-family:Charter,Georgia,"Times New Roman",serif;font-size:1.45rem;font-weight:700;color:var(--ink);text-decoration:none}
nav{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:.875rem}
nav a{text-decoration:none}
nav a[aria-current="page"]{text-decoration:underline}
main{padding-block:clamp(36px,7vw,72px)}
h1,h2,h3{font-family:Charter,Georgia,"Times New Roman",serif;font-weight:400;line-height:1.13;text-wrap:balance}
h1{font-size:clamp(2.35rem,6vw,3.7rem);letter-spacing:-.035em;margin:12px 0 24px}
h2{font-size:clamp(1.9rem,4vw,2.7rem);letter-spacing:-.025em;margin:0 0 24px}
h3{font-size:1.35rem;margin:0 0 12px}
p,ul,ol,dl{max-width:70ch}
p{margin:0 0 20px}
.lead{font-size:1.15rem;line-height:1.6}
.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.hero{padding-bottom:clamp(44px,8vw,80px)}
section+section,.ruled{border-top:1px solid var(--rule);padding-top:40px;margin-top:40px}
ul,ol{padding-left:1.3em}
li{padding-left:.25em;margin-bottom:12px}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:24px 0}
.btn{display:inline-block;border:1px solid var(--accent);border-radius:3px;padding:12px 20px;font:inherit;font-size:.95rem;font-weight:700;text-align:center;text-decoration:none;line-height:1.4}
.btn-primary{color:var(--paper);background:var(--accent)}
.btn:hover{text-decoration:underline}
.btn:disabled{color:var(--muted);background:transparent;border-color:var(--rule);cursor:not-allowed}
.note,figcaption,.breadcrumb,.status{font-size:.875rem;color:var(--muted)}
.status{border-block:1px solid var(--rule);padding-block:12px;margin:24px 0}
figure{margin:32px 0}
.cover{display:block;width:100%;max-width:560px;height:auto;border:1px solid var(--rule);border-radius:0}
figcaption{margin-top:10px}
.sheet-list dt,.faq dt{font-weight:700;margin-top:24px}
.sheet-list dd,.faq dd{margin:8px 0 0}
.price{font-family:Charter,Georgia,"Times New Roman",serif;font-size:3rem;line-height:1.2;margin-bottom:12px}
.legal{list-style:none;padding:0;font-size:.95rem}
.legal li{padding:0}
footer .wrap{border-top:1px solid var(--rule);padding-block:32px 48px}
footer p{margin-bottom:14px}
footer nav{margin:20px 0}
.skip{position:absolute;left:20px;top:-100px;background:var(--paper);padding:10px;z-index:1}
.skip:focus{top:10px}
@media(max-width:480px){header .wrap{align-items:flex-start}header nav{width:100%;gap:10px 18px}.actions{align-items:stretch;flex-direction:column}.actions .btn{width:100%}}

.workbook-shots figure{margin:1.5rem 0}
.shot{display:block;width:100%;max-width:680px;height:auto;margin-inline:auto;border:1px solid var(--rule);border-radius:0}
.shot-caption{max-width:680px;margin:.5rem auto 0;text-align:center;font-size:.875rem;color:var(--muted)}