@layer components{.practice-header{border-bottom:1px solid var(--border);gap:1.5rem;margin-bottom:1.75rem;padding-bottom:1.75rem;display:grid}@media (min-width:1024px){.practice-header{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:3rem;margin-bottom:2rem;padding-bottom:2rem}}.practice-header-copy{min-width:0;max-width:40rem}.practice-header-with-controls{grid-template-areas:"copy""facts""controls";gap:1rem;margin-bottom:1.25rem;padding-bottom:1.25rem}.practice-header-with-controls>.practice-header-copy{grid-area:copy}.practice-header-with-controls>.practice-exam-fact{grid-area:facts}.practice-header-controls{grid-area:controls;min-width:0}.practice-header-controls .practice-toolbar{gap:.625rem;margin-bottom:0}.practice-header-controls .practice-resume-card{gap:.625rem;padding:.625rem .75rem}@media (min-width:1024px){.practice-header-with-controls{grid-template-columns:minmax(11rem,1fr) minmax(0,2.1fr) auto;grid-template-areas:"copy controls 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dd{align-items:baseline;gap:.375rem;margin:0;display:flex}.practice-exam-fact-number{color:var(--primary);font-family:var(--font-lora), Georgia, "Times New Roman", serif;font-variant-numeric:lining-nums tabular-nums;font-size:2rem;font-weight:600;line-height:1}.practice-exam-fact-unit{color:var(--ink-muted);font-size:.875rem}@media (min-width:1024px){.practice-exam-fact{border-left:2px solid var(--maple);padding-left:1.5rem}.practice-exam-fact-number{font-size:2.5rem}}.practice-help{color:var(--ink-muted);margin-top:1.125rem;font-size:.875rem}.practice-help-summary{cursor:pointer;border:1px solid var(--border);background:var(--card);width:fit-content;min-height:2.25rem;color:var(--ink);border-radius:999px;align-items:center;gap:.5rem;padding:.375rem .875rem .375rem .75rem;font-size:.8125rem;font-weight:500;list-style:none;transition:border-color .15s,color .15s;display:inline-flex}.practice-help-summary::-webkit-details-marker{display:none}.practice-help-summary:before{content:"?";background:var(--primary-muted);width:1.125rem;height:1.125rem;color:var(--primary);border-radius:999px;justify-content:center;align-items:center;font-size:.6875rem;font-weight:700;display:inline-flex}.practice-help-summary:after{content:"";border-bottom:1.5px solid;border-right:1.5px solid;width:.4rem;height:.4rem;margin-left:.125rem;transition:transform .15s;transform:translateY(-2px)rotate(45deg)}.practice-help[open]>.practice-help-summary:after{transform:translateY(1px)rotate(225deg)}.practice-help-summary:hover{border-color:color-mix(in srgb, var(--primary) 40%, var(--border));color:var(--primary)}.practice-help-summary:focus-visible{outline:2px solid var(--primary);outline-offset:3px}.practice-help-body{border:1px solid var(--border);border-left:3px solid var(--primary);background:var(--card);border-radius:.75rem;max-width:44rem;margin-top:.75rem;padding:1rem 1.125rem;line-height:1.65}.practice-toolbar{gap:1rem;margin-bottom:1.5rem;display:grid}.practice-resume-grid{gap:.75rem;display:grid}@media (min-width:640px){.practice-resume-grid[data-count="2"]{grid-template-columns:repeat(2,minmax(0,1fr));max-width:44rem}.practice-resume-grid[data-count="1"]{max-width:22rem}}.practice-resume-card{border:1px solid var(--border);background:var(--card);min-width:0;box-shadow:var(--shadow-xs);border-radius:.875rem;align-items:center;gap:.875rem;padding:.875rem 1rem;transition:border-color .15s,box-shadow .15s;display:flex}.practice-resume-card:hover{border-color:color-mix(in srgb, var(--primary) 40%, var(--border));box-shadow:var(--shadow-md)}.practice-resume-card:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.practice-resume-icon{background:var(--primary-muted);width:2.5rem;height:2.5rem;color:var(--primary);border-radius:.625rem;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.practice-resume-card[data-primary=true] .practice-resume-icon{background:var(--primary);color:#fff}.practice-resume-text{flex-direction:column;flex:1;gap:.125rem;min-width:0;display:flex}.practice-resume-label{color:var(--ink);font-size:.9375rem;font-weight:600;line-height:1.3}.practice-resume-detail{color:var(--ink-muted);font-variant-numeric:tabular-nums;text-overflow:ellipsis;white-space:nowrap;font-size:.8125rem;overflow:hidden}.practice-resume-bar{background:var(--primary-muted);border-radius:999px;height:4px;margin-top:.375rem;display:block;overflow:clip}.practice-resume-bar>span{border-radius:inherit;background:var(--primary);height:100%;display:block}.practice-resume-arrow{color:var(--ink-muted);flex-shrink:0;transition:transform .15s,color .15s}.practice-resume-card:hover .practice-resume-arrow{color:var(--primary);transform:translate(2px)}.practice-filter-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;display:flex}.practice-segmented{isolation:isolate;border:1px solid var(--border);background:var(--card);border-radius:999px;width:100%;padding:.25rem;display:grid;position:relative}@media (min-width:640px){.practice-segmented{width:auto}}.practice-segmented-indicator{z-index:-1;background:var(--primary);pointer-events:none;border-radius:999px;transition:transform .2s;position:absolute;top:.25rem;bottom:.25rem;left:.25rem}.practice-segmented button{min-height:2.5rem;color:var(--ink-muted);white-space:nowrap;border-radius:999px;padding:.375rem .625rem;font-size:.8125rem;font-weight:500;transition:color .15s}@media (min-width:640px){.practice-segmented button{padding-inline:1.125rem;font-size:.875rem}}.practice-segmented button:hover{color:var(--ink)}.practice-segmented button[aria-pressed=true]{color:#fff;font-weight:600}.practice-segmented button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.practice-count{color:var(--ink-muted);font-variant-numeric:tabular-nums;font-size:.8125rem}.practice-count strong{color:var(--ink);font-weight:600}.practice-mode-card{border:1px solid var(--border);background:var(--card);text-align:left;height:100%;box-shadow:var(--shadow-xs);border-radius:.875rem;gap:1rem;padding:1.125rem 1.25rem;transition:border-color .15s,box-shadow .15s,background-color .15s;display:flex}@media (min-width:768px){.practice-mode-card{padding:1.375rem 1.5rem}}.practice-mode-card:hover{border-color:color-mix(in srgb, var(--primary) 40%, var(--border));box-shadow:var(--shadow-md)}.practice-mode-card:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.practice-mode-card[aria-pressed=true]{border-color:var(--primary);background:linear-gradient(180deg, color-mix(in srgb, var(--primary-muted) 70%, white), var(--card));box-shadow:inset 0 0 0 1px var(--primary)}.practice-mode-icon{background:var(--primary-muted);width:2.75rem;height:2.75rem;color:var(--primary);border-radius:.75rem;flex-shrink:0;justify-content:center;align-items:center;transition:background-color .15s,color .15s;display:inline-flex}.practice-mode-card[aria-pressed=true] .practice-mode-icon{background:var(--primary);color:#fff}.practice-mode-body{flex-direction:column;flex:1;min-width:0;display:flex}.practice-mode-title{color:var(--ink);font-family:var(--font-lora), Georgia, serif;font-size:1.1875rem;font-weight:600;line-height:1.3}.practice-mode-text{color:var(--ink-muted);flex:1;margin-top:.375rem;font-size:.875rem;line-height:1.6}.practice-mode-cta{color:var(--primary);align-items:center;gap:.25rem;margin-top:.875rem;font-size:.875rem;font-weight:600;display:inline-flex}.practice-mode-state{background:var(--primary);color:#fff;border-radius:999px;align-items:center;gap:.25rem;margin-left:auto;padding:.125rem .5rem;font-size:.6875rem;font-weight:600;display:inline-flex}@media (prefers-reduced-motion:reduce){.practice-segmented-indicator,.practice-resume-arrow,.practice-help-summary:after{transition:none}}.practice-quick-start{border:1px solid color-mix(in srgb, var(--primary) 18%, var(--border));border-radius:var(--radius-lg);background:var(--primary-muted);margin-bottom:1.5rem;padding:1rem 1.125rem 1.125rem}.practice-quick-start-head{justify-content:space-between;align-items:center;gap:1rem;display:flex}.practice-quick-start-title{color:var(--ink);font-size:1rem;font-weight:600}.practice-quick-start-close{width:2.75rem;height:2.75rem;color:var(--ink-muted);border-radius:999px;justify-content:center;align-items:center;margin:-.5rem -.5rem -.5rem 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@layer components{.quiz-option-muted{border-color:var(--border);color:var(--ink-muted);opacity:.7}.quiz-option-muted:hover{border-color:var(--border);background-color:var(--card)}.quiz-reveal-note{border:1px solid var(--border);border-radius:var(--radius);background:color-mix(in srgb, var(--primary-muted) 50%, transparent);color:var(--ink-muted);align-items:flex-start;gap:.5rem;padding:.625rem .875rem;font-size:.875rem;line-height:1.5rem;display:flex}.reading-nav-square-viewed{border-style:dashed;border-color:color-mix(in srgb, var(--primary) 45%, transparent);background:color-mix(in srgb, var(--primary-muted) 60%, transparent);color:var(--primary)}.quiz-action-btn-study{border-color:color-mix(in srgb, var(--primary) 35%, transparent);color:var(--primary)}.quiz-action-btn-study:hover{border-color:var(--primary);background:color-mix(in srgb, var(--primary-muted) 50%, transparent)}.level-picker{gap:1.25rem;display:grid}.level-picker-title{font-family:var(--font-lora), Georgia, serif;color:var(--ink);font-size:clamp(1.375rem,2.4vw,1.75rem);font-weight:600;line-height:1.2}.level-picker-intro{max-width:38rem;color:var(--ink-muted);margin-top:.375rem;font-size:.9375rem;line-height:1.6}.level-stairs{gap:.625rem;display:grid}.level-stair-button{width:100%;margin-left:calc(var(--step) * .5rem);max-width:calc(100% - var(--step) * .5rem);border:1px solid var(--border);border-radius:var(--radius-lg);background:color-mix(in srgb, var(--primary) calc(var(--step) * 1.6%), var(--card));text-align:left;grid-template-columns:4.25rem minmax(0,1fr);grid-template-areas:"code name""code meta""track track";align-items:center;gap:.125rem .75rem;min-height:5.25rem;padding:.875rem 1rem .75rem;transition:border-color .15s,box-shadow .15s;display:grid;position:relative}.level-stair-button:hover{border-color:color-mix(in srgb, var(--primary) 55%, transparent);box-shadow:var(--shadow-md)}.level-stair-button:focus-visible{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 30%, transparent);outline:none}.level-stair-code{font-family:var(--font-lora), Georgia, serif;letter-spacing:-.01em;color:var(--primary);grid-area:code;font-size:2.125rem;font-weight:600;line-height:1}.level-stair-name{color:var(--ink);grid-area:name;font-size:.9375rem;font-weight:600}.level-stair-meta{color:var(--ink-muted);font-variant-numeric:tabular-nums;grid-area:meta;font-size:.8125rem}.level-stair-track{border-radius:var(--radius-pill);background:color-mix(in srgb, var(--primary) 12%, var(--card));grid-area:track;height:.25rem;margin-top:.625rem;display:block;overflow:hidden}.level-stair-fill{border-radius:inherit;background:var(--primary);height:100%;display:block}.level-stair-resume{color:var(--maple);align-items:center;gap:.375rem;font-size:.75rem;font-weight:600;display:inline-flex;position:absolute;top:.75rem;right:.875rem}.level-stair-resume:before{content:"";background:var(--maple);border-radius:999px;width:.4375rem;height:.4375rem}.level-stair-button.is-resume{border-color:color-mix(in srgb, var(--maple) 45%, var(--border))}.level-picker-mixed{border:1px dashed var(--border-strong);border-radius:var(--radius-lg);text-align:left;background:0 0;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.25rem 1rem;width:100%;padding:.875rem 1rem;font-size:.875rem;transition:border-color .15s,background-color .15s;display:flex}.level-picker-mixed:hover,.level-picker-mixed:focus-visible{border-color:var(--primary);background:var(--card);outline:none}@media (min-width:900px){.level-stairs{grid-template-columns:repeat(6,minmax(0,1fr));align-items:end;gap:.75rem}.level-stair-button{max-width:none;min-height:calc(10.5rem + var(--step) * 1.75rem);grid-template-columns:minmax(0,1fr);grid-template-areas:"code""name""meta""track";align-content:end;row-gap:.25rem;margin-left:0;padding:1.125rem 1rem 1rem}.level-stair-code{margin-bottom:.5rem;font-size:2.75rem}.level-stair-resume{top:.875rem;left:1rem;right:auto}}.level-round{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--card);margin-bottom:1.25rem;padding:.75rem 1rem .5rem}.level-round-row{flex-wrap:wrap;align-items:center;gap:.5rem .875rem;display:flex}.level-round-level{border-right:1px solid var(--border);align-items:baseline;gap:.5rem;min-height:2.75rem;padding:0 .875rem 0 0;display:inline-flex}.level-round-code{font-family:var(--font-lora), Georgia, serif;color:var(--primary);font-size:1.625rem;font-weight:600;line-height:2.75rem}.level-round-change{color:var(--ink-muted);text-decoration:underline;-webkit-text-decoration-color:color-mix(in srgb, var(--ink-muted) 40%, transparent);text-decoration-color:color-mix(in srgb, var(--ink-muted) 40%, transparent);text-underline-offset:3px;font-size:.75rem}.level-round-level:hover .level-round-change,.level-round-level:focus-visible .level-round-change{color:var(--primary);text-decoration-color:currentColor}.level-round-level:focus-visible{outline:2px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px;border-radius:var(--radius)}.level-round-where{flex:auto;min-width:0}.level-round-more{margin-left:auto;position:relative}@media (max-width:639px){.level-round-where{flex-basis:100%;order:3}.level-round-level{border-right:0}}.level-round-more>summary{border:1px solid var(--border);border-radius:var(--radius);min-height:2.75rem;color:var(--ink-muted);cursor:pointer;align-items:center;padding:0 .875rem;font-size:.8125rem;font-weight:500;list-style:none;display:inline-flex}.level-round-more>summary::-webkit-details-marker{display:none}.level-round-more[open]>summary,.level-round-more>summary:hover{border-color:color-mix(in srgb, var(--primary) 45%, transparent);color:var(--primary)}.level-round-more>summary:focus-visible{outline:2px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}.level-round-more-panel{z-index:30;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--card);width:min(20rem,100vw - 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