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12px;font-size:14px;font-weight:500;line-height:20px;display:inline-flex}.pz-primary,.pz-secondary{cursor:pointer;border:0;border-radius:999px;justify-content:center;align-items:center;width:100%;min-height:48px;margin:18px 0 4px;padding:0 20px;font-family:inherit;font-size:18px;font-weight:700;line-height:22px;text-decoration:none;transition:transform .1s ease-out,box-shadow .1s ease-out,filter .15s;display:flex}.pz-primary{background:var(--pz-blue);box-shadow:0 4px 0 var(--pz-blue-edge);color:#fff}.pz-primary:hover{filter:brightness(1.06)}.pz-primary:active{box-shadow:0 0 0 var(--pz-blue-edge);transform:translateY(4px)}.pz-primary:disabled,.pz-primary[aria-disabled=true]{background:var(--pz-raised);box-shadow:0 4px 0 var(--pz-line-soft);color:var(--pz-ink-soft);cursor:default;filter:none;transform:none}.pz-secondary{border:2px solid var(--pz-line);color:var(--pz-ink);background:0 0;margin-top:10px}.pz-secondary:hover{background:var(--pz-raised)}.pz-quiet{min-height:44px;color:var(--pz-ink-soft);text-decoration:underline;-webkit-text-decoration-color:var(--pz-line);text-decoration-color:var(--pz-line);text-underline-offset:4px;cursor:pointer;background:0 0;border:0;align-items:center;padding:0 4px;font-family:inherit;font-size:15px;font-weight:500;display:inline-flex}.pz-quiet:hover{color:var(--pz-ink)}.pz-primary:focus-visible,.pz-secondary:focus-visible,.pz-quiet:focus-visible,.pz-option:focus-visible,.pz-seg-option:focus-visible,.pz-alt:focus-visible,.pz-close:focus-visible{outline:2px solid var(--pz-ink);outline-offset:3px}.pz-mia{align-items:flex-end;gap:10px;min-width:0;display:flex}.pz-mia-face{flex:none;line-height:0}.pz-bubble{background:var(--pz-raised);overflow-wrap:anywhere;min-width:0;animation:pz-rise var(--pz-shift) var(--pz-ease) both;border-radius:18px 18px 18px 4px;margin:0 0 6px;padding:10px 14px;font-size:17px;line-height:24px;position:relative}.pz-next-head{justify-content:space-between;align-items:flex-end;gap:12px;display:flex}.pz-next-head .pz-mia-face{margin:-8px -6px -4px 0}.pz-fallback{color:var(--pz-ink-soft);margin:10px 0 0;font-size:15px;line-height:22px}.pz-alts{border-top:2px solid var(--pz-line-soft);margin:14px 0 0;padding:12px 0 0}.pz-alts-label{color:var(--pz-ink-soft);margin:0 0 2px;font-size:14px;line-height:20px}.pz-alts ul{margin:0;padding:0;list-style:none}.pz-alt{min-height:44px;color:var(--pz-ink);justify-content:space-between;align-items:center;gap:12px;padding:4px 0;font-size:16px;line-height:22px;text-decoration:none;display:flex}.pz-alt:hover .pz-alt-name{text-underline-offset:3px;text-decoration:underline}.pz-alt-name{overflow-wrap:anywhere;min-width:0}.pz-alt-time{color:var(--pz-ink-soft);flex:none;font-size:14px}.pz-ask{background:var(--pz-blue-soft);border-radius:16px;margin:16px 0 0;padding:14px 16px;font-weight:700}.pz-ask-q{margin:0}.pz-ask-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.pz-ask-row .pz-primary{flex:200px;width:auto}.pz-ask-row .pz-quiet{margin-top:14px}@media (max-width:520px){.pz-ask-row{flex-direction:column;align-items:stretch;gap:0}.pz-ask-row .pz-primary{flex:none;width:100%}.pz-ask-row .pz-quiet{align-self:center;margin-top:6px}}.pz-level{background:var(--pz-raised);width:100%;min-height:56px;animation:pz-rise var(--pz-shift) var(--pz-ease) both;border-radius:16px;align-items:center;gap:10px;padding:6px 8px 6px 10px;display:flex}.pz-level p{flex:auto;min-width:0;margin:0;font-size:16px;font-weight:500;line-height:22px}.pz-close{width:44px;height:44px;color:var(--pz-ink-soft);cursor:pointer;background:0 0;border:0;border-radius:50%;flex:none;place-items:center;display:grid}.pz-close:hover{background:var(--pz-line-soft);color:var(--pz-ink)}.pz-level-undo{white-space:nowrap;flex:none;font-size:14px}@media (max-width:520px){.pz-level{flex-wrap:wrap}.pz-level p{flex-basis:calc(100% - 110px)}.pz-level-undo{order:3;margin-left:50px}}.pz-card-top{justify-content:flex-end;margin:-10px -10px 0 0;display:flex}.pz-slipped{flex-direction:column;gap:6px;margin:4px 0 0;padding:0;list-style:none;display:flex}.pz-slipped a{color:var(--pz-ink);text-underline-offset:4px;font-weight:600}.pz-flow{flex-direction:column;gap:16px;width:100%;max-width:640px;margin:0 auto;display:flex}.pz-flow-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px 12px;min-height:44px;display:flex}.pz-flow-name{overflow-wrap:anywhere;min-width:0;margin:0;font-size:15px;font-weight:700;line-height:20px}.pz-dots{gap:6px;margin:0;padding:0;list-style:none;display:flex}.pz-dots li{background:var(--pz-line-soft);width:22px;height:8px;transition:background var(--pz-tick) ease;border-radius:999px}.pz-dots li[data-state=current]{background:var(--pz-line)}.pz-dots li[data-state=right]{background:var(--pz-right)}.pz-dots li[data-state=miss]{background:var(--pz-miss-line)}.pz-dots li[data-state=done]{background:var(--pz-ink)}.pz-stem{overflow-wrap:anywhere;margin:0;font-size:19px;line-height:28px}.pz-math{margin:12px 0 0;font-size:19px;overflow-x:auto}.pz-options{gap:10px;margin:18px 0 0;padding:0;list-style:none;display:grid}.pz-option{border:2px solid var(--pz-line);background:var(--pz-card);width:100%;min-height:52px;box-shadow:0 3px 0 var(--pz-line-soft);color:var(--pz-ink);text-align:left;cursor:pointer;transition:border-color var(--pz-tick) ease, background var(--pz-tick) ease, transform .1s ease;border-radius:16px;align-items:center;gap:12px;padding:10px 14px;font-family:inherit;font-size:17px;line-height:24px;display:flex}.pz-option:hover:not(:disabled):not([data-state]){background:var(--pz-raised)}.pz-option:active:not(:disabled){transform:translateY(2px)}.pz-option:disabled{cursor:default}.pz-option[data-selected=true]{border-color:var(--pz-blue);background:var(--pz-blue-soft)}.pz-option[data-state=right]{border-color:var(--pz-right);background:var(--pz-right-tint)}.pz-option[data-state=miss]{border-color:var(--pz-miss-line);background:var(--pz-miss-tint)}.pz-option[data-state=retry]{border-color:var(--pz-retry-line);background:var(--pz-retry-tint)}.pz-option-key{background:var(--pz-raised);text-transform:uppercase;border-radius:8px;flex:none;place-items:center;width:28px;height:28px;font-size:14px;font-weight:700;display:grid}.pz-option[data-state=right] .pz-option-key{background:var(--pz-right);color:#fff}.pz-option-text{overflow-wrap:anywhere;min-width:0}.pz-verdict{border-radius:14px;margin:12px 0 0;padding:10px 14px;font-size:16px;font-weight:500;line-height:22px}.pz-verdict[data-state=right]{background:var(--pz-right-tint);color:var(--pz-right)}.pz-verdict[data-state=miss]{background:var(--pz-miss-tint);color:var(--pz-miss)}.pz-verdict[data-state=retry]{background:var(--pz-retry-tint);color:var(--pz-retry-ink)}.pz-verdict:empty{margin:0;padding:0}.pz-why{color:var(--pz-ink);margin-top:4px;font-weight:400;display:block}.pz-option[aria-disabled=true]{cursor:default}.pz-steps{gap:8px;margin:16px 0 0;padding:0;list-style:none;display:grid}.pz-step{background:var(--pz-raised);animation:pz-rise var(--pz-shift) var(--pz-ease) both;border:2px solid #0000;border-radius:14px;grid-template-columns:28px minmax(0,1fr);align-items:start;gap:10px;padding:10px 12px;display:grid}.pz-step[data-focus=true]{border-color:var(--pz-retry-line);background:var(--pz-retry-tint)}.pz-step[data-gap=true]{border-color:var(--pz-line);background:var(--pz-card);border-style:dashed}.pz-step[data-gap=true][data-state=right]{border-style:solid;border-color:var(--pz-right);background:var(--pz-right-tint)}.pz-step-n{background:var(--pz-card);border-radius:50%;place-items:center;width:28px;height:28px;font-size:14px;font-weight:700;display:grid}.pz-step-body{overflow-wrap:anywhere;min-width:0}.pz-step-body .pz-math{margin-top:6px;font-size:18px}.pz-gap-choices{flex-wrap:wrap;gap:8px;margin:8px 0 0;padding:0;list-style:none;display:flex}.pz-gap-choices .pz-option{border-radius:12px;width:auto;min-height:44px;padding:6px 12px}.pz-stage{color:var(--pz-ink-soft);gap:8px;margin:0;padding:0;font-size:14px;line-height:20px;list-style:none;display:flex}.pz-stage li{white-space:nowrap;align-items:center;gap:6px;display:flex}.pz-flow-top .pz-quiet{white-space:nowrap}.pz .katex-display{margin:4px 0}.pz-stage li[data-state=current]{color:var(--pz-ink);font-weight:700}.pz-stage li+li:before{content:"";background:var(--pz-line);border-radius:2px;width:14px;height:2px}.pz-done-topics{margin-top:18px}.pz-topics{gap:4px;margin:8px 0 0;padding:0;list-style:none;display:grid}.pz-lessons{gap:6px;margin:14px 0 0;padding:0;list-style:none;display:grid}.pz-lessons li{background:var(--pz-raised);border-radius:12px;justify-content:space-between;align-items:center;gap:10px;min-height:44px;padding:6px 12px;font-size:16px;line-height:22px;display:flex}.pz-lessons a{color:var(--pz-ink)}.pz-tag{color:var(--pz-ink-soft);flex:none;font-size:14px}.pz-skills{flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none;display:flex}.pz-tally{gap:6px;margin:14px 0 0;padding:0;list-style:none;display:grid}.pz-tally li{justify-content:space-between;align-items:center;gap:12px;min-height:40px;font-size:16px;display:flex}.pz-tally-marks{gap:4px;display:flex}.pz-tally-marks i{background:var(--pz-miss-line);border-radius:50%;width:12px;height:12px}.pz-tally-marks i[data-right=true]{background:var(--pz-right)}.pz-seg{border:0;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0 0;padding:0;display:grid}.pz-seg-legend{margin:0;font-size:17px;font-weight:700;line-height:24px}.pz-seg-option{border:2px solid var(--pz-line);background:var(--pz-card);min-height:56px;box-shadow:0 3px 0 var(--pz-line-soft);color:var(--pz-ink);cursor:pointer;border-radius:16px;flex-direction:column;justify-content:center;align-items:center;padding:6px 4px;font-family:inherit;display:flex}.pz-seg-option[aria-checked=true]{border-color:var(--pz-blue);background:var(--pz-blue-soft);box-shadow:0 3px 0 var(--pz-blue-edge)}.pz-seg-min{font-size:20px;font-weight:700;line-height:24px}.pz-seg-unit{color:var(--pz-ink-soft);font-size:13px;line-height:16px}.pz-seg-note{color:var(--pz-ink-soft);margin:12px 0 0;font-size:15px;line-height:22px}.pz-sr{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;margin:-1px;position:absolute;overflow:hidden}@media (max-width:520px){.pz-card{border-radius:20px;padding:18px 16px}.pz-title{font-size:23px;line-height:29px}.pz-stem{font-size:18px;line-height:26px}}@media (prefers-reduced-motion:reduce){.pz-card,.pz-bubble,.pz-level,.pz-step{animation:none}.pz-primary,.pz-option{transition:none}}.pz-mia-wrap:focus:not(:focus-visible),.pz-stem:focus:not(:focus-visible),.pz-line:focus:not(:focus-visible),.pz-step-body span:focus:not(:focus-visible){outline:none}.pz-mia-wrap:focus-visible,.pz-stem:focus-visible,.pz-step-body span:focus-visible{outline:2px solid var(--pz-ink);outline-offset:3px;border-radius:8px}.pz-flow:focus:not(:focus-visible){outline:none}.pz-home-slot{width:100%;max-width:680px;margin:0 0 20px}