/* Standard Form 1.0.0. Extends the shared maths-skills workspace without changing it. */
.st-lab .st-value{font-size:clamp(1.45rem,4.4vw,2.25rem);letter-spacing:.015em}
.st-lab .st-signed-input{display:flex;align-items:end;gap:6px;min-width:0}
.st-lab .st-signed-input input{flex:1;width:0;min-width:0}
.st-lab .st-standard{max-width:580px;grid-template-columns:minmax(120px,1fr) auto minmax(108px,135px)}
.st-lab .st-standard .sf-times{font-size:1.1rem}
.st-lab .st-standard .sf-sign{min-width:38px}
.st-lab .st-power-answer{display:flex;gap:8px;align-items:flex-end;max-width:215px}
.st-power-answer>span{font-size:2.5rem;line-height:1;padding-bottom:4px}
.st-power-answer>label{flex:1;min-width:0}
.st-lab .st-data{grid-template-columns:minmax(100px,.7fr) minmax(0,1.6fr)}
.st-data dd{text-align:left;font-weight:550}
.st-lab .st-key-entry{max-width:370px}
.st-key-entry>label:first-child{max-width:270px;font-size:.9rem}
.st-key-entry>label+label{margin-top:16px}
.st-lab .st-key-entry input{font-family:ui-monospace,Consolas,monospace;font-size:1.18rem;letter-spacing:.035em}
.st-key-entry .sf-muted{font-size:.85rem;margin:8px 0 12px}
.st-keypad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0 18px}
.st-keypad button{background:#f4f8f9;color:#183c4d;border:1px solid #a5b9c2;border-radius:4px;min-height:48px;font:inherit;font-weight:650;font-size:1.08rem;cursor:pointer}
.st-keypad .st-exp-key{background:#def0ef;border-color:#477e81;color:#14484c}
.st-keypad button:hover{background:#e4eff1}
.st-order-values{display:grid;gap:10px;max-width:460px}
.st-order-values button{display:flex;gap:20px;align-items:center;text-align:left;font:inherit;font-size:1.2rem;min-height:58px;background:#fff;border:1px solid #a9bcc5;border-radius:4px;padding:12px;color:#183c4d;cursor:pointer}
.st-order-letter{font-size:.95rem;font-weight:750;color:#436473}
.st-order-values .is-selected{border-style:dashed;background:#edf3f5}
.st-order-output{font-size:1.15rem;min-height:28px;margin:20px 0 2px;font-weight:600}
.st-equivalence{border-top:2px solid #167984;border-bottom:1px solid #c8d9df;padding:22px 0;margin:24px 0;display:grid;grid-template-columns:minmax(0,1fr);gap:10px}
.st-equation{font-size:clamp(1.7rem,4vw,2.3rem);font-weight:650;margin:0;overflow-wrap:anywhere}
.st-equals{font-size:1.5rem;color:#566d78;line-height:1}
.st-ordinary{font-size:clamp(1.3rem,4vw,2rem);font-family:ui-monospace,Consolas,monospace;letter-spacing:.025em;line-height:1.9;overflow-wrap:anywhere;margin:0;font-variant-numeric:tabular-nums}
.st-original-digit{border-bottom:3px solid #167984;color:#123f4b;font-weight:750}
.st-place-zero{color:#667c85}
.st-decimal-point{font-weight:800;color:#123f4b}
.st-explore-fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(80px,.7fr) auto;gap:14px;align-items:end}
.st-step-controls{display:flex;gap:12px;flex-wrap:wrap;margin:15px 0}
.st-lab .st-step-controls .button{padding:11px 18px;min-height:46px}
.st-calculator-learn{padding-top:20px;margin-top:22px;border-top:1px solid #c8d9df}
.st-calculator-learn>h2{font-size:1.55rem}
.st-calculator-learn .sf-feedback:empty{display:none}
.st-learn-footer{border-top:1px solid #c8d9df;margin-top:24px;padding:24px 0}
.st-learn-footer>button{margin-right:14px}
.st-lab .sf-feedback [role=math]{overflow-wrap:anywhere}
.st-lab #st-learn-title{scroll-margin-top:100px}
@media(min-width:760px){.st-equivalence{grid-template-columns:minmax(0,1fr) auto minmax(0,1.3fr);align-items:center;gap:20px}.st-ordinary{font-size:clamp(1.15rem,2.5vw,1.7rem)}}
@media(max-width:600px){.st-lab .st-standard{grid-template-columns:minmax(100px,1fr) auto minmax(98px,115px);gap:7px}.st-lab .sf-sign{min-width:34px}.st-lab .sf-standard input{padding:10px 8px}.st-lab .st-standard label{font-size:.9rem}.st-lab .st-data{grid-template-columns:1fr}.st-data dt{border-bottom:0;padding-bottom:0;font-size:.85rem;color:#586d77}.st-data dd{padding-left:0;padding-top:4px}.st-explore-fields{grid-template-columns:minmax(0,1.3fr) minmax(75px,1fr)}.st-explore-fields .button{grid-column:1/-1;justify-self:start}.st-lab .st-key-entry{max-width:340px}.st-keypad{gap:7px}.st-keypad button{min-height:46px}.st-lab .sf-workspace{margin:0}.st-order-values button{gap:14px}}
@media(max-width:350px){.st-lab .st-standard{grid-template-columns:minmax(86px,1fr) auto minmax(93px,1fr);gap:6px}.st-lab .st-standard .sf-sign{min-width:30px;padding:0}.st-lab .sf-exponent-controls{gap:4px}.st-lab .st-signed-input{gap:4px}.st-lab .st-standard .sf-times{font-size:.95rem}.st-lab .st-standard label{font-size:.83rem}.st-keypad button{font-size:1rem}}
@media(prefers-reduced-motion:reduce){.st-lab *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* Keep the existing share prompt away from an active question and its feedback. */
body.st-practising .student-share-nudge{display:none}

/* The existing reporting dialog stays available without a floating keypad obstruction. */
.st-lab .content-report-widget{position:relative;right:auto;bottom:auto;margin:16px 0 4px;display:flex;justify-content:flex-end}
.st-lab .content-report-panel{max-width:calc(100vw - 40px)}