/* Chemistry Lab v1.6: Space chemistry wears the lab's shell. Fonts and palettes come from lab-shell.css. */
h1,h2,h3,.stage-heading h2,.world-heading h2,.section-intro h2,.chapter-title h3,.facts-heading h3,dialog h2,.quick-facts strong{font-family:"Lab Display",Georgia,serif;font-weight:400;letter-spacing:-.02em}
.lab-mobile-nav{grid-template-columns:repeat(6,1fr)}
@media(max-width:680px){.lab-mobile-nav{grid-template-columns:repeat(6,1fr)}.lab-mobile-nav a{font-size:11px;gap:3px}}
.lab-header .quiet-button{white-space:nowrap}
/* Scale ladder: atom → molecule → element → world */
.scale-ladder{display:flex;align-items:stretch;gap:8px;margin:0 36px 22px;padding:10px;border:1px solid var(--line);border-radius:18px;background:var(--surface);overflow-x:auto;scrollbar-width:none}
.scale-ladder::-webkit-scrollbar{display:none}
.scale-ladder a{flex:1 1 0;min-width:150px;display:flex;flex-direction:column;gap:3px;padding:12px 16px;border-radius:12px;color:var(--ink);transition:background .2s,transform .25s cubic-bezier(.2,.8,.2,1)}
.scale-ladder a:hover{background:var(--panel);transform:translateY(-2px);color:var(--ink)}
.scale-ladder a small{font-size:10px;letter-spacing:.14em;color:var(--muted);font-weight:800}
.scale-ladder a strong{font-family:"Lab Display",Georgia,serif;font-weight:400;font-size:22px;letter-spacing:-.02em;line-height:1.1}
.scale-ladder a span{font-size:12px;color:var(--muted)}
.scale-ladder a[aria-current]{background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 22%,var(--surface)),var(--raised));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 30%,transparent)}
.scale-ladder a[aria-current] small{color:var(--accent)}
.scale-ladder i{align-self:center;color:var(--muted);font-style:normal;font-size:18px}
#space-stars{color:var(--gold);font-weight:800;letter-spacing:.08em}
@media(max-width:1150px){.scale-ladder{margin:0 25px 20px}}
@media(max-width:900px){.scale-ladder{margin:0 18px 18px}.scale-ladder i{display:none}.scale-ladder a{min-width:138px;padding:10px 12px}.scale-ladder a strong{font-size:19px}}
@media(max-width:700px){.scale-ladder{margin:0 16px 16px;padding:8px}.explorer-footer{font-size:10px}.explorer-footer>span:last-child{display:inline}}
/* Midnight / Nebula: the stage and the planet dock pick up the palette */
:root:is([data-palette=midnight],[data-palette=nebula]) .scene-stage{box-shadow:0 0 0 1px color-mix(in srgb,var(--accent) 22%,transparent),0 24px 60px #0009}
:root:is([data-palette=midnight],[data-palette=nebula]) .planet-button[aria-pressed=true]{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 40%,transparent)}