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0;border-radius:12px;min-width:0}.question-editor legend{font-weight:700;padding:0 8px;white-space:pre-wrap}.assessment-option{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid var(--line);border-radius:8px;margin:8px 0;cursor:pointer}.assessment-option input{width:auto;flex:0 0 auto}.assessment-timer{position:sticky;top:12px;z-index:10;background:var(--pale);color:var(--ink);padding:16px;border:1px solid var(--line);border-radius:8px;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}html[data-theme=dark]{color-scheme:dark;--ink:#fff;--muted:#b8b8b8;--green:#fff;--pale:#151515;--paper:#000;--line:#303030;--white:#000;--button-ink:#000;--hover:#e6e6e6;--error-bg:#3b2821;--error-line:#a97756;--input-line:#555}html[data-theme] body{padding-bottom:75px}html[data-theme] .auth-card,html[data-theme] .empty,html[data-theme] .lesson-card,html[data-theme] .lesson-list,html[data-theme] .panel,html[data-theme] .prose,html[data-theme] .sidebar,html[data-theme] .skip,html[data-theme] .stats>div,html[data-theme] .student-card,html[data-theme] .topbar{background:var(--white);color:var(--ink)}html[data-theme] input:not([type=checkbox]),html[data-theme] select,html[data-theme] textarea{background:var(--white);color:var(--ink);border-color:var(--input-line)}html[data-theme] .button{background:var(--green);color:var(--button-ink)}html[data-theme] .button:hover{background:var(--hover)}html[data-theme] .button.secondary,html[data-theme] .user .button{background:var(--white);color:var(--green)}html[data-theme] .brand-mark{background:var(--green);color:var(--button-ink)}html[data-theme] .notice,html[data-theme] .notice.success{background:var(--pale);border-color:var(--line);color:var(--ink)}html[data-theme] .notice.error{background:var(--error-bg);border-color:var(--error-line)}html[data-theme] .lesson-row:hover{background:var(--pale)}html[data-theme=dark] .subject-tags span,html[data-theme=dark] .tags span,html[data-theme] .badge{background:var(--pale);color:var(--ink)}html[data-theme=dark] .student-record,html[data-theme=dark] .student-record-stats>div{background:var(--paper);color:var(--ink)}html[data-text-size=large] body{font-size:18px}html[data-reduced-motion=true] *,html[data-reduced-motion=true] :after,html[data-reduced-motion=true] :before{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:1px solid var(--line);border-radius:50%;background:var(--white);color:var(--green)}.settings-button{flex-shrink:0}.notification-bell:hover,.settings-button:hover{background:var(--pale)}.settings-dialog{width:min(900px,calc(100vw - 40px));min-height:min(560px,calc(100vh - 40px));max-height:calc(100vh - 40px);padding:0;border:1px solid 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