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auto;padding-top:clamp(8px,5vw,54px)}#practice-view{width:min(100%,960px)}.practice-topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:18px}.practice-topbar .eyebrow{margin:0}.timer{display:flex;min-width:98px;flex-direction:column;align-items:flex-end;color:var(--navy-deep);font-variant-numeric:tabular-nums}.timer-label{color:var(--muted);font-size:.76rem;font-weight:800;letter-spacing:.11em;text-transform:uppercase}#timer-value{font-size:1.55rem;font-weight:820}.problem-card{min-height:430px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:clamp(32px,7vw,64px);text-align:center}#practice-view .problem-card{padding:clamp(24px,5vw,52px)}.problem{display:flex;min-height:132px;align-items:center;justify-content:center;color:var(--navy-deep);font-family:Helvetica Neue,Arial,Helvetica,sans-serif;font-size:clamp(3.5rem,10vw,6.6rem);font-variant-numeric:lining-nums 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solid #c7c1b7;border-radius:7px;background:#f7f4ef;color:#343332;font:650 .8rem system-ui,sans-serif;cursor:pointer}.visual-tuner-section-reset:hover{background:#eee9e1}.visual-tuner-actions{display:grid;grid-template-columns:1fr;gap:8px;border-top:1px solid #e3ded6;background:#fff;padding:12px 0 0}.visual-tuner-actions button{min-height:40px;border:1px solid #343332;border-radius:9px;background:#343332;color:#fff;font:700 .82rem system-ui,sans-serif;cursor:pointer}.visual-tuner-actions button:hover{opacity:.88}.visual-tuner-actions p{grid-column:1 / -1;min-height:1em;margin:0;color:#5d5c58;font-size:.8rem}.visual-tuner-actions textarea{grid-column:1 / -1;width:100%;min-height:90px;border:1px solid #c7c1b7;border-radius:7px;padding:8px;font:.75rem ui-monospace,monospace}.visual-tuner-resize{position:absolute;left:3px;top:3px;width:28px;height:28px;border:0;border-radius:10px 0 5px;background:transparent;cursor:nwse-resize;touch-action:none}.visual-tuner-resize:after{content:"";position:absolute;left:5px;top:5px;width:13px;height:13px;background:repeating-linear-gradient(135deg,transparent 0 4px,#786f63 4px 6px,transparent 6px 9px);clip-path:polygon(0 0,100% 0,0 100%)}.visual-tuner-resize:hover,.visual-tuner-resize:focus-visible{background:#f3f0ea}@container (max-width: 350px){.visual-tuner-field{grid-template-columns:minmax(0,1fr) minmax(70px,1fr) 42px 27px;gap:4px}}@media(max-width:520px){.visual-tuner-toggle{right:12px;bottom:12px}.visual-tuner{right:12px;bottom:66px;max-height:calc(100dvh - 82px);padding:14px}.visual-tuner[data-resized]{max-height:calc(100dvh - 16px)}}#on-screen-keyboard-toggle{position:fixed;z-index:61;right:max(12px,env(safe-area-inset-right));bottom:calc(var(--site-keyboard-reserve, 0px) + 12px);min-height:42px;padding:7px 13px;border:1px solid #a8c5d7;border-radius:999px;background:#f2f8fc;color:#17354b;box-shadow:0 5px 16px #12354a29;font-size:.875rem;font-weight:650;white-space:nowrap}#on-screen-keyboard-toggle[aria-pressed=true]{background:#dceefa;border-color:#85b3cd}#on-screen-keyboard-toggle:focus-visible,#on-screen-keyboard .site-keyboard-key:focus-visible{outline:3px solid #387da6;outline-offset:2px}#on-screen-keyboard{position:fixed;z-index:60;left:50%;bottom:calc(8px + env(safe-area-inset-bottom));transform:translate(-50%);width:min(100%,1080px);padding:12px 14px 10px;border:1px solid #c8dce9;border-radius:16px;background:#f2f8fc;color:#17354b;box-shadow:0 -8px 24px #12354a1f;touch-action:manipulation}.site-keyboard-controlled{caret-color:transparent}#site-keyboard-caret-mirror{position:fixed;z-index:59;box-sizing:border-box;overflow:hidden;border-style:solid;border-color:transparent;background:transparent;color:transparent;pointer-events:none;transform-origin:top left}#site-keyboard-caret-mirror[hidden]{display:none}#site-keyboard-caret-mirror .site-keyboard-caret-mark{display:inline-block;width:2px;height:1.1em;vertical-align:-.18em;animation:site-keyboard-caret-blink 1s steps(1,end) infinite}@keyframes site-keyboard-caret-blink{50%{opacity:0}}@media(prefers-reduced-motion:reduce){#site-keyboard-caret-mirror .site-keyboard-caret-mark{animation:none}}#on-screen-keyboard .site-keyboard-keys{display:grid;gap:5px}#on-screen-keyboard .site-keyboard-row{display:flex;gap:5px}#on-screen-keyboard[data-layout=text] .site-keyboard-middle{padding-inline:4.8%}#on-screen-keyboard .site-keyboard-key{flex:1 1 0;min-width:0;min-height:44px;padding:0 2px;border:1px solid #c8dce9;border-radius:7px;background:#fff;color:#17354b;box-shadow:0 2px #b4ccda;font-size:1rem;font-weight:550;text-align:center;-webkit-tap-highlight-color:transparent;touch-action:manipulation}#on-screen-keyboard .site-keyboard-key:active:not(:disabled){transform:translateY(1px);box-shadow:none}#on-screen-keyboard .site-keyboard-action{background:#dceefa}#on-screen-keyboard .site-keyboard-wide{flex:1.35 1 0}#on-screen-keyboard[data-layout=text] .site-keyboard-space{flex:4 1 0}#on-screen-keyboard .site-keyboard-key:disabled{opacity:.38;cursor:default;box-shadow:none}#on-screen-keyboard[data-layout=math] .site-keyboard-row{display:grid;grid-template-columns:repeat(13,minmax(0,1fr));gap:6px}#on-screen-keyboard[data-layout=math] .site-keyboard-key{width:100%;font-size:1.0625rem}#on-screen-keyboard[data-layout=math] .site-keyboard-key[data-key=Space],#on-screen-keyboard[data-layout=math] .site-keyboard-key[data-key=Enter]{font-size:.75rem}#on-screen-keyboard .site-keyboard-labeled{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px}#on-screen-keyboard .site-keyboard-symbol{font-size:1.375rem;line-height:.9}#on-screen-keyboard .site-keyboard-caption{font-size:.6875rem;line-height:1;font-weight:400}body.site-keyboard-open:not(:has(.equations-practice-view:not([hidden]))) .app-shell{padding-bottom:calc(var(--site-keyboard-reserve, 0px) + 24px)}body.site-keyboard-open #practice-view{padding-top:8px}body.site-keyboard-open #practice-view .problem-card{min-height:min(430px,max(190px,calc(var(--allowable-space-height, 100vh) - 140px)))}body.site-keyboard-open .equations-work-panel{max-height:calc(100dvh - var(--site-keyboard-reserve, 0px) - 24px)}@media(max-width:620px){#on-screen-keyboard{padding:9px 9px 8px}#on-screen-keyboard[data-layout=math] .site-keyboard-row{grid-template-columns:repeat(7,minmax(0,1fr))}#on-screen-keyboard .site-keyboard-row{gap:3px}}@media(max-width:390px){#on-screen-keyboard[data-layout=math] .site-keyboard-row{grid-template-columns:repeat(6,minmax(0,1fr))}#on-screen-keyboard[data-layout=text] .site-keyboard-key{font-size:.8125rem}}