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(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.study-shell{min-height:100vh;padding-bottom:env(safe-area-inset-bottom)}.skip-link{z-index:20;border-radius:var(--radius-control);background:var(--bg-surface);color:var(--text-main);box-shadow:var(--shadow-panel);padding:12px 16px;position:fixed;top:8px;left:8px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.study-topbar{z-index:2;border-bottom:1px solid var(--border-muted);background:var(--bg-surface);justify-content:space-between;align-items:center;gap:20px;min-height:64px;padding:8px 32px;display:flex;position:relative}.study-brand{color:var(--text-main);font-family:var(--font-heading),Arial,sans-serif;font-size:20px;font-weight:600;text-decoration:none}.study-brand span{color:var(--action-primary)}.study-account{justify-content:flex-end;align-items:center;gap:16px;min-width:0;display:flex}.study-account-email{max-width:min(34vw,320px);color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.study-workspace{grid-template-columns:224px minmax(0,1fr);width:min(100%,1360px);min-height:calc(100vh - 64px);margin:0 auto;display:grid}.study-sidebar{border-right:1px solid var(--border-muted);padding:32px 16px}.study-nav{gap:8px;display:grid}.study-nav-link{border-radius:var(--radius-control);min-height:48px;color:var(--text-main);align-items:center;padding:10px 12px;font-weight:500;text-decoration:none;display:flex}.study-nav-link:hover{background:var(--action-soft);color:var(--text-main)}.study-nav-link[aria-current=page]{background:var(--action-soft);color:#07566c;font-weight:600}.study-main{min-width:0;padding:40px 32px 64px}.study-page{width:min(100%,820px);margin:0 auto}.study-page-heading{margin-bottom:28px}.study-eyebrow{color:var(--text-muted);margin:0 0 8px;font-size:14px;font-weight:600}.study-title{letter-spacing:-.02em;margin:0;font-size:clamp(28px,4vw,36px);line-height:1.15}.study-lede,.study-copy{max-width:72ch;color:var(--text-muted);font-size:16px;line-height:1.65}.study-lede{margin:12px 0 0}.study-section-title{margin:0 0 12px;font-size:22px;line-height:1.25}.study-section{margin-top:32px}.study-panel{border:1px solid var(--border-muted);border-radius:var(--radius-panel);background:var(--bg-surface);padding:24px}.study-rows{border-top:1px solid var(--border-muted)}.attempt-row{border-bottom:1px solid var(--border-muted);justify-content:space-between;align-items:flex-start;gap:24px;padding:20px 4px;display:flex}.attempt-row-main{min-width:0}.attempt-row-title{margin:0;font-size:18px;font-weight:600;line-height:1.4}.attempt-row-title a{color:var(--text-main);text-decoration-thickness:1px}.attempt-row-title a:hover{color:var(--action-hover)}.attempt-row-subtitle,.attempt-row-meta{color:var(--text-muted);margin:4px 0 0;font-size:14px;line-height:1.5}.attempt-row-metrics{color:var(--text-main);font-variant-numeric:tabular-nums;flex-wrap:wrap;gap:8px 20px;margin-top:12px;font-size:14px;display:flex}.attempt-row-action{flex:none;align-self:center}.study-button{border-radius:var(--radius-control);cursor:pointer;text-align:center;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:10px 18px;font-size:16px;font-weight:600;line-height:1.3;text-decoration:none;display:inline-flex}.study-button:disabled{cursor:not-allowed;opacity:.65}.study-button-primary{background:var(--action-primary);color:var(--on-action)}.study-button-primary:hover:not(:disabled){background:var(--action-hover);color:var(--on-action)}.study-button-secondary{border-color:var(--border-control);background:var(--bg-surface);color:var(--text-main)}.study-button-secondary:hover:not(:disabled){background:var(--action-soft)}.study-button-quiet{min-height:44px;color:var(--action-primary);background:0 0;padding:8px 12px}.study-button-quiet:hover:not(:disabled){background:var(--action-soft);color:var(--action-hover)}.study-status,.study-empty{border:1px solid var(--border-muted);border-radius:var(--radius-panel);background:var(--bg-surface);padding:20px}.study-status p,.study-empty p{margin:0}.study-status-error{border-color:var(--state-error);background:var(--error-soft)}.study-empty h2,.study-empty h3{margin:0;font-size:20px}.study-empty p{color:var(--text-muted);margin-top:8px}.study-actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.study-local-time-note{color:var(--text-muted);margin:-12px 0 20px;font-size:14px}.review-summary{border-top:1px solid var(--border-muted);border-bottom:1px solid var(--border-muted);grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:0 0 28px;padding:20px 0;display:grid}.review-summary div{min-width:0}.review-summary dt{color:var(--text-muted);font-size:14px}.review-summary dd{font-variant-numeric:tabular-nums;margin:4px 0 0;font-size:18px;font-weight:600}.review-list{gap:20px;display:grid}.review-item{border:1px solid var(--border-muted);border-radius:var(--radius-panel);background:var(--bg-surface);padding:24px;scroll-margin-top:24px}.review-item-header{border-bottom:1px solid var(--border-muted);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 20px;padding-bottom:12px;display:flex}.review-item-header h2{margin:0;font-size:20px;line-height:1.3}.review-item-state{color:var(--text-muted);font-size:14px;font-weight:600}.review-question-label{margin:16px 0 4px;font-size:16px;font-weight:600}.review-instruction{color:var(--text-muted);margin:0 0 12px;font-size:16px}.review-stem{overflow-wrap:anywhere;white-space:pre-wrap;margin:0 0 20px;font-size:18px;line-height:1.65}.review-options{gap:8px;margin:0;padding:0;list-style:none;display:grid}.review-option{border:1px solid var(--border-muted);border-radius:var(--radius-control);background:var(--bg-surface);align-items:flex-start;gap:12px;padding:12px;display:flex}.review-option-copy{overflow-wrap:anywhere;white-space:pre-wrap;flex:1;min-width:0}.review-option-tags{flex-wrap:wrap;flex:0 auto;gap:6px;display:flex}.review-option-tag{border:1px solid var(--border-control);background:var(--bg-main);min-height:28px;color:var(--text-main);border-radius:6px;align-items:center;padding:3px 8px;font-size:13px;font-weight:600;line-height:1.3;display:inline-flex}.review-option-tag-correct{border-color:var(--state-success);background:var(--success-soft);color:#14532d}.review-feedback{border-top:1px solid var(--border-muted);margin-top:20px;padding-top:16px}.review-feedback h3{margin:0;font-size:18px}.review-explanations h4{margin:0;font-size:16px;font-weight:600}.review-feedback-summary{font-variant-numeric:tabular-nums;margin:8px 0 0;font-weight:600}.review-explanations{gap:12px;margin:12px 0 0;display:grid}.review-explanations p{overflow-wrap:anywhere;white-space:pre-wrap;margin:0}.review-pagination{justify-content:space-between;align-items:center;gap:12px;margin-top:24px;display:flex}.study-mobile-nav{display:none}.study-auth-gate{place-items:center;min-height:100vh;padding:24px;display:grid}.study-auth-gate>div{width:min(100%,420px)}@media (max-width:1023px){.study-workspace{grid-template-columns:192px minmax(0,1fr)}.study-main{padding:32px 24px 56px}}@media (max-width:700px){.study-topbar{min-height:60px;padding:8px 20px}.study-brand{font-size:18px}.study-account-email{display:none}.study-workspace{min-height:calc(100vh - 60px);display:block}.study-sidebar{display:none}.study-main{padding:28px 20px calc(112px + env(safe-area-inset-bottom))}.study-page-heading{margin-bottom:24px}.attempt-row{padding:18px 0;display:block}.attempt-row-action{margin-top:16px}.review-summary{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px}.review-item{padding:18px}.review-option{display:block}.review-option-tags{margin-top:10px}.study-mobile-nav{z-index:5;border-top:1px solid var(--border-control);background:var(--bg-surface);min-height:64px;padding:6px 12px calc(6px + env(safe-area-inset-bottom));grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;display:grid;position:fixed;bottom:0;left:0;right:0}.study-mobile-nav .study-nav-link{text-align:center;justify-content:center;min-height:48px;padding:8px 6px;font-size:14px}}@media (max-width:380px){.study-topbar{gap:8px;padding-left:14px;padding-right:14px}.study-brand{font-size:17px}.study-account{gap:4px}.study-main{padding-left:16px;padding-right:16px}.review-pagination{align-items:stretch}.review-pagination .study-button{padding-left:10px;padding-right:10px}}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}