/* Shared teaching pages. Diagrams retain their labels at every screen size. */
.science-page{padding-bottom:5rem;font-size:1.05rem}
.science-page *{box-sizing:border-box}
.science-page a{color:var(--rpi-link);text-underline-offset:.2em}
.science-page p{line-height:1.8;margin:0 0 1.2rem}
.science-page .eyebrow{font:.73rem/1.6 var(--rpi-mono);text-transform:uppercase;letter-spacing:.07em;color:var(--rpi-muted);margin:0 0 1.1rem}
.science-opening{padding:4.5rem 0 3.4rem;border-bottom:1px solid var(--rpi-line)}
.science-page .science-opening h1{font:500 clamp(2.7rem,5.5vw,4.8rem)/1.08 var(--rpi-sans);letter-spacing:-.055em;max-width:18ch;margin:0 0 1.6rem}
.science-opening .deck{font-size:clamp(1.2rem,2vw,1.45rem);line-height:1.7;max-width:45rem;margin-bottom:0}
.science-jumps{display:flex;gap:.7rem 1.8rem;flex-wrap:wrap;margin-top:2rem;font-size:.87rem}
.science-section{padding:3.5rem 0;border-bottom:1px solid var(--rpi-line)}
.science-section:last-child{border-bottom:0}
.science-page h2{font:500 clamp(1.65rem,2.8vw,2.3rem)/1.2 var(--rpi-sans);margin:0 0 1.4rem;letter-spacing:-.03em;max-width:30ch}
.science-page h3{font:600 1.17rem/1.4 var(--rpi-sans);margin:0 0 .75rem}
.science-copy{max-width:43rem}
.science-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:4rem;align-items:start}
.science-page figure{margin:1.8rem 0}
.science-page figcaption,.science-note{font-size:.87rem;line-height:1.7;color:var(--rpi-muted)}
.science-page figcaption{margin-top:1.1rem;max-width:51rem}
.science-page .science-note{margin-bottom:0}
.science-stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;padding:0;margin:0;gap:0;border:1px solid var(--rpi-line);background:#f6fbf8}
.science-stages li{padding:1.5rem;position:relative;min-width:0}
.science-stages li+li{border-left:1px solid var(--rpi-line)}
.science-stages .stage-number{display:block;font:.73rem var(--rpi-mono);color:var(--rpi-muted);margin-bottom:1.2rem}
.science-stages strong{display:block;font-weight:600;font-size:1rem;margin-bottom:.6rem}
.science-stages p{font-size:.88rem;line-height:1.65;margin:0}
.science-stages .stage-symbol{font:500 1.6rem/1.4 var(--rpi-mono);margin-bottom:.8rem;color:var(--rpi-ink)}
.science-fields{margin-top:1.5rem}
.science-field{display:grid;grid-template-columns:3rem minmax(0,1fr) minmax(0,1.12fr);gap:1.5rem;padding:2rem 0;border-top:1px solid var(--rpi-line);align-items:start}
.science-field .field-number{font:.8rem var(--rpi-mono);padding-top:.3rem;color:var(--rpi-muted)}
.science-field h3{font-size:1.5rem;font-weight:500;margin-bottom:.5rem}
.science-field .field-question{font-size:.95rem;line-height:1.6;color:var(--rpi-muted);margin:0}
.science-field .field-description p{font-size:.97rem;margin-bottom:.75rem}
.science-field .field-description a{font-size:.88rem}
.science-reading{list-style:none;padding:0;margin:1.5rem 0 0;max-width:48rem}
.science-reading li{border-top:1px solid var(--rpi-line);padding:1.3rem 0}
.science-reading a{font-weight:500;font-size:1.04rem}
.science-reading p{font-size:.9rem;line-height:1.7;color:var(--rpi-muted);margin:.4rem 0 0}
.science-page details.lesson-detail{margin-top:1.5rem;border-top:1px solid var(--rpi-line);border-bottom:1px solid var(--rpi-line);padding:1rem 0;font-size:.93rem;max-width:48rem}
.lesson-detail summary{cursor:pointer;font-weight:500;line-height:1.6;padding:.3rem 0}
.lesson-detail[open] summary{margin-bottom:1rem}
.lesson-detail p:last-child{margin-bottom:.5rem}
.skip{position:absolute;left:1rem;top:-10rem;background:#fff;padding:1rem;z-index:50}
.skip:focus{top:1rem}
.science-page :is(a,button,summary):focus-visible{outline:3px solid #654e93;outline-offset:4px}
.journey-demo{border:1px solid var(--rpi-line);background:rgba(255,255,255,.7);margin-top:2rem}
.journey-panels{display:grid;grid-template-columns:1fr 1fr}
.journey-panel{padding:1.5rem 2rem 1.8rem;min-width:0}
.journey-panel+ .journey-panel{border-left:1px solid var(--rpi-line)}
.journey-panel h3{font-size:1.05rem;font-weight:500;margin-bottom:.4rem}
.journey-panel .route-subtitle{font-size:.8rem;color:var(--rpi-muted);line-height:1.5;margin:0}
.journey-panel svg{width:100%;height:auto;max-height:260px;display:block;margin:.7rem auto 1rem}
.journey-panel svg text{font:11px var(--rpi-mono);fill:var(--rpi-muted)}
.journey-panel svg .cube-base{stroke:#b0c5bc;stroke-width:1.6}
.journey-panel svg .cube-marked{stroke-dasharray:4 4}
.journey-panel svg .cube-travel{stroke:#275f50;stroke-width:3.8;fill:none;stroke-linecap:round}
.journey-panel svg .cube-current{fill:#654e93;stroke:#fff;stroke-width:3}
.journey-panel svg .edge-label{fill:#654e93;font-size:11px;paint-order:stroke;stroke:#fcfdfb;stroke-width:4px;stroke-linejoin:round}
.journey-word{border-top:1px solid var(--rpi-line);padding-top:1rem}
.journey-word .word-label{font-size:.78rem;color:var(--rpi-muted);display:block;margin-bottom:.5rem}
.journey-word output{font:500 clamp(1.05rem,2vw,1.35rem)/1.6 var(--rpi-mono);overflow-wrap:anywhere}
.journey-controls{padding:1.1rem 2rem;background:var(--rpi-lilac);display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;border-top:1px solid var(--rpi-line)}
.journey-controls[hidden]{display:none}
.journey-controls button{font:500 .84rem var(--rpi-sans);padding:.65rem 1rem;min-height:44px;color:var(--rpi-ink);background:#fff;border:1px solid #a4aaa7;border-radius:3px;cursor:pointer}
.journey-controls button.primary{color:#fff;background:var(--rpi-ink);border-color:var(--rpi-ink)}
.journey-controls button:disabled{opacity:.45;cursor:default}
.journey-controls .step-label{font:.78rem var(--rpi-mono);margin-left:auto}
.journey-comparison{padding:1.25rem 2rem;border-top:1px solid var(--rpi-line);display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
.journey-comparison p{font-size:.9rem;line-height:1.6;margin:0}
.journey-comparison span{display:block;font-size:.78rem;color:var(--rpi-muted);margin-bottom:.25rem}
.journey-legend{display:flex;gap:.6rem 1.5rem;flex-wrap:wrap;margin-top:1rem;font-size:.8rem;color:var(--rpi-muted)}
.journey-legend i{display:inline-block;width:1.4rem;border-top:2px solid #b0c5bc;vertical-align:middle;margin-right:.4rem}
.journey-legend i.marked{border-top-style:dashed}
.journey-legend i.travel{border-top:3px solid #275f50}
.science-inset{border-left:3px solid #7da18c;padding:.2rem 0 .2rem 1.4rem;margin:1.8rem 0}
.science-inset p:last-child{margin-bottom:0}
.science-page .link-arrow{white-space:nowrap}
@media(max-width:900px){.science-split{grid-template-columns:1fr;gap:1.5rem}.science-stages{grid-template-columns:1fr 1fr}.science-stages li:nth-child(3){border-left:0}.science-stages li:nth-child(n+3){border-top:1px solid var(--rpi-line)}.science-field{grid-template-columns:2rem 1fr;gap:.8rem 1rem}.science-field .field-description{grid-column:2}}
@media(max-width:600px){.science-opening{padding:2.8rem 0 2.5rem}.science-section{padding:2.6rem 0}.science-page{font-size:1rem}.science-stages{grid-template-columns:1fr}.science-stages li{padding:1.2rem}.science-stages li+li{border-left:0;border-top:1px solid var(--rpi-line)}.science-stages .stage-number{margin-bottom:.6rem}.journey-panels{grid-template-columns:1fr}.journey-panel{padding:1.4rem}.journey-panel+.journey-panel{border-left:0;border-top:1px solid var(--rpi-line)}.journey-panel svg{max-height:210px}.journey-controls,.journey-comparison{padding:1.1rem 1.4rem}.journey-comparison{grid-template-columns:1fr;gap:.8rem}.journey-controls .step-label{width:100%;margin:.3rem 0 0}.science-page .science-opening h1{font-size:2.7rem}}
@media print{.science-jumps,.journey-controls,.skip{display:none!important}.science-page{font-size:11pt}.science-opening{padding:1rem 0}.science-section{padding:1.5rem 0}.journey-demo,.science-stages{break-inside:avoid}.science-page h2{break-after:avoid}}