.hero-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:65px;max-width:1340px;margin:65px auto 0;padding:0 34px 48px;align-items:center}.banner{min-height:0;background:radial-gradient(ellipse at 80% 35%,#183858,#091a30 50%,#060e1c)}.banner .hero-copy{padding:0;margin:0;pointer-events:auto}.banner h1{font-size:clamp(40px,4.1vw,62px);line-height:1.08;letter-spacing:-.055em}.banner h1 span{color:#94b9e6;-webkit-text-stroke:0;text-shadow:none}.banner .lede{max-width:440px;font-size:16px}.banner .actions{max-width:none}.banner .lab{position:relative;top:auto;right:auto;width:auto;max-width:none;margin:0;padding:24px;border:1px solid #ffffff20;border-radius:20px;background:#09182abb;box-shadow:0 24px 80px #0003}.banner .viewport{height:280px}.hero-route{display:flex;gap:14px;flex-wrap:wrap;margin-top:44px;font:9px ui-monospace,monospace;color:#91a5c1}.mode-tabs{display:flex;gap:5px;margin:18px 0}.mode-tabs button,.explorer-tools button,.explorer-tools select{border:1px solid #47607d;background:#122640;color:#c7d6eb;border-radius:7px;padding:9px 10px;font:12px system-ui;cursor:pointer}.mode-tabs button{flex:1}.mode-tabs button[aria-pressed=true]{background:#dcecff;color:#102944;border-color:#dcecff}.explorer-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.explorer-tools label{font-size:11px;color:#a8bdd5}.explorer-tools button{margin-left:auto}.banner .legend{margin-top:14px}.equation-strip{display:flex;gap:18px;align-items:center;border-top:1px solid #ffffff20;padding-top:14px;font-size:12px;color:#b1c3db}.equation-strip strong{font:20px Georgia,serif;color:#e0ecff;white-space:nowrap}.topic-link{display:inline-block;margin-top:15px;font-size:13px;color:#9ccaff!important;text-underline-offset:4px}.banner .model-note{margin-bottom:0;line-height:1.5}.banner #response svg{width:100%;height:115px}.banner #response text{fill:#a8bdd5;font:10px system-ui}.example-band{padding:45px 0;border-bottom:1px solid var(--rule)}.example-band h2{margin:5px 0;font-size:29px}.example-band p{color:var(--muted)}.example-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:24px}.example-grid a{display:flex;flex-direction:column;gap:15px;padding:22px;border:1px solid #d8e0eb;border-radius:12px;text-decoration:none;background:#fff;transition:transform .2s,border-color .2s}.example-grid a:hover{transform:translateY(-3px);border-color:#4876a3}.example-grid span{font:9px ui-monospace,monospace;color:#627b98}.example-grid strong{font:600 19px Georgia,serif;color:#183858}.example-grid small{font-size:11px;color:#526f8f}button:focus-visible,select:focus-visible{outline:2px solid #ffbe80;outline-offset:3px}[hidden]{display:none!important}@media(max-width:1000px){.hero-layout{gap:25px;padding-inline:24px}.banner h1{font-size:42px}.mode-tabs button{padding:9px 5px;font-size:11px}.example-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.hero-layout{grid-template-columns:1fr;margin-top:40px;padding-inline:18px}.banner .hero-copy{padding:0 4px 10px}.banner .lab{padding:16px}.banner h1{font-size:44px;max-width:540px}.banner .lede{max-width:100%}.hero-route{margin-top:25px}.banner .viewport{height:245px}.banner .lab-heading{font-size:8px}.example-grid{grid-template-columns:1fr 1fr}.example-grid a{padding:15px}.equation-strip{gap:12px}}@media(prefers-reduced-motion:reduce){.example-grid a{transition:none}}

.banner .color-scale{background:linear-gradient(90deg,#285ec9,#498fdb,#a6c7e9,#f0c187,#e56c51)}
.banner .view-caption{bottom:36px;left:0;font-size:8px;letter-spacing:0}
/* All perspectives share the same layout slots: switching never moves the canvas. */
.banner .lab h2{height:58px;margin:16px 0 4px;display:flex;align-items:center;line-height:1.2}
.banner .lab-intro{height:44px;margin:0;line-height:1.5}
.explorer-tools{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:36px 36px;gap:5px 10px;height:77px}
#field-control{grid-column:1;grid-row:1}#mesh-control{grid-column:1;grid-row:2}#play{grid-column:2;grid-row:1;width:90px}
#mesh-control[hidden]{display:block!important;visibility:hidden}
.lab[data-perspective=mechanics] #field-control,.lab[data-perspective=mechanics] .legend{visibility:hidden}
.response-slot{height:150px;display:flex;align-items:center;overflow:hidden}
.response-slot>div{width:100%}
#physical-context{font-size:12px;color:#a8bdd5;padding:12px 14px;border:1px solid #ffffff16;border-radius:8px;background:#ffffff04}
#physical-context strong{font-size:13px;color:#e0eaff}#physical-context p{margin:8px 0;line-height:1.5}#physical-context span{font:10px ui-monospace,monospace;color:#92b7df}
.equation-strip{height:65px;padding-block:10px}.topic-link{line-height:20px}
@media(max-width:420px){.banner .lab h2{font-size:20px;height:60px}.banner .lab-intro{height:60px}.explorer-tools select{max-width:165px;padding:7px 4px;font-size:10px}.explorer-tools label{font-size:10px}.equation-strip{height:76px}}
/* A single control row keeps the teaching scene compact in every perspective. */
.explorer-tools{grid-template-rows:36px;height:36px}#mesh-control{grid-row:1}
.lab[data-perspective=mesh] #field-control{visibility:hidden}
.lab[data-perspective=mechanics] .legend{visibility:visible;position:relative}
.lab[data-perspective=mechanics] .legend>*{visibility:hidden}
.lab[data-perspective=mechanics] .legend::after{content:'METAL SPECIMEN  ·  OPPOSING GRIPS  ·  TENSILE LOAD';position:absolute;inset:10px 0 auto;color:#a8bdd5;font:10px ui-monospace,monospace;line-height:1.6}

.banner .brand img{width:310px;height:auto}@media(max-width:720px){.banner .brand img{width:235px}}

/* Align the introduction with the explorer instead of vertically centering it. */
.hero-layout{align-items:start;margin-top:32px}
.banner .hero-copy{padding-top:18px}
.banner h1{font-size:clamp(38px,3.7vw,54px);line-height:1.12}
@media(max-width:760px){.hero-layout{margin-top:24px}.banner .hero-copy{padding-top:0}.banner h1{font-size:40px}}

/* Compact scene footer; explanatory content belongs in the library. */
.banner .legend{position:absolute;top:220px;left:34px;width:200px;margin:0;pointer-events:none;font-size:9px}
.banner .color-scale{height:3px;margin-top:5px}.banner .scale-labels{margin-top:3px}
.lab[data-perspective=mechanics] .legend{visibility:hidden;position:absolute}
.lab[data-perspective=mechanics] .legend::after{content:none}
.banner .viewport{height:320px;margin-top:10px}
.banner .view-caption{display:none}
.banner #response{position:absolute;bottom:8px;left:0;width:min(270px,70%);padding:4px 6px;border:1px solid #ffffff20;border-radius:8px;background:#09182ae8;pointer-events:none}
.banner #response svg{height:90px;display:block}
.banner .load-row{margin-top:8px}.banner #load{margin:6px 0 8px}
.banner .topic-link{margin-top:3px;font-size:12px}.banner .model-note{display:inline;float:right;margin-top:7px;font-size:10px}
.banner .lab{padding-bottom:18px}
@media(max-width:420px){.banner .legend{top:237px;left:24px;width:170px}.banner .model-note{float:none;display:block;margin-top:6px}.banner .viewport{height:290px}}