.reading-lesson{margin-top:1.5rem}.reading-lesson__steps{flex-wrap:wrap;gap:1.25rem;margin:0 0 1.25rem;padding:0;list-style:none;display:flex}.reading-lesson__step{color:var(--site-text);align-items:center;gap:.5rem;font-size:.92rem;font-weight:600;display:inline-flex}.reading-lesson__step--muted{color:var(--site-muted);font-weight:500}.reading-lesson__step--active{color:var(--site-primary)}.reading-lesson__step-num{border:1.5px solid;border-radius:999px;place-items:center;width:1.65rem;height:1.65rem;font-size:.78rem;display:grid}.reading-lesson__layout{grid-template-columns:minmax(0,1fr) minmax(260px,320px);align-items:start;gap:1.5rem;display:grid}@media (max-width:960px){.reading-lesson__layout{grid-template-columns:1fr}.reading-lesson__sidebar{order:2;max-height:min(24rem,55vh);position:static}}.reading-lesson__text-card{background:var(--site-surface);border:1px solid color-mix(in srgb, var(--site-text) 10%, transparent);border-radius:var(--practice-radius-lg,1rem);box-shadow:0 1px 0 color-mix(in srgb, var(--site-text) 4%, transparent);padding:1.35rem 1.5rem}.reading-lesson__paragraph{color:var(--site-text);margin:0 0 1rem;font-size:1.02rem;line-height:1.78}.reading-lesson__paragraph:last-child{margin-bottom:0}.reading-term{text-decoration:underline;text-decoration-thickness:1.5px;-webkit-text-decoration-color:color-mix(in srgb, var(--site-primary) 55%, var(--site-text));text-decoration-color:color-mix(in srgb, var(--site-primary) 55%, var(--site-text));text-underline-offset:.18em;cursor:help;scroll-margin-top:6rem;display:inline;position:relative}.reading-term--active{-webkit-text-decoration-color:var(--site-primary);text-decoration-color:var(--site-primary);background:color-mix(in srgb, var(--site-primary) 8%, transparent);border-radius:.15em}.reading-term__tip{background:var(--site-text);min-width:8rem;max-width:16rem;color:var(--site-surface);text-align:center;white-space:normal;opacity:0;visibility:hidden;pointer-events:none;z-index:5;border-radius:.45rem;padding:.45rem .65rem;font-size:.82rem;font-style:normal;font-weight:500;line-height:1.35;transition:opacity .15s,transform .15s,visibility .15s;position:absolute;bottom:calc(100% + .45rem);left:50%;transform:translate(-50%)translateY(4px)}.reading-term__tip:after{content:"";border:6px solid #0000;border-top-color:var(--site-text);position:absolute;top:100%;left:50%;transform:translate(-50%)}.reading-term:hover .reading-term__tip,.reading-term:focus-visible .reading-term__tip,.reading-term--active .reading-term__tip{opacity:1;visibility:visible;transform:translate(-50%)translateY(0)}.reading-lesson__actions{grid-template-columns:repeat(2,minmax(0,1fr));gap:.85rem;margin-top:1.25rem;display:grid}@media (max-width:640px){.reading-lesson__actions{grid-template-columns:1fr}}.reading-lesson__btn{cursor:pointer;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;min-height:3rem;padding:.75rem 1rem;font-size:.92rem;font-weight:600;text-decoration:none;transition:background .15s,border-color .15s,opacity .15s;display:inline-flex}.reading-lesson__btn:disabled{opacity:.55;cursor:not-allowed}.reading-lesson__btn--youtube{color:#fff;background:#c4302b}.reading-lesson__btn--youtube:not(:disabled):hover{background:#a92723}.reading-lesson__btn--plain{background:var(--site-surface);color:var(--site-text);border-color:color-mix(in srgb, var(--site-text) 18%, transparent)}.reading-lesson__btn--plain:hover{background:color-mix(in srgb, var(--site-text) 4%, var(--site-surface))}.reading-lesson__video,.reading-lesson__video-placeholder{border-radius:var(--practice-radius-lg,1rem);margin-top:1.25rem;overflow:hidden}.reading-lesson__video iframe{aspect-ratio:16/9;border:0;width:100%;display:block}.reading-lesson__video-placeholder{border:1px dashed color-mix(in srgb, var(--site-text) 18%, transparent);background:color-mix(in srgb, var(--site-text) 3%, var(--site-surface));min-height:7rem;color:var(--site-muted);text-align:center;place-items:center;padding:1rem;font-size:.88rem;display:grid}.reading-lesson__sidebar{flex-direction:column;min-height:0;max-height:calc(100vh - 6.5rem);display:flex;position:sticky;top:5.5rem}.reading-expr-sidebar{background:var(--site-surface);border:1px solid color-mix(in srgb, var(--site-text) 10%, transparent);border-radius:var(--practice-radius-lg,1rem);box-shadow:0 8px 24px color-mix(in srgb, var(--site-text) 6%, transparent);max-height:inherit;flex-direction:column;min-height:0;display:flex;overflow:hidden}.reading-expr-sidebar__head{border-bottom:1px solid color-mix(in srgb, var(--site-text) 8%, transparent);flex-shrink:0;align-items:center;gap:.55rem;padding:.95rem 1rem;display:flex}.reading-expr-sidebar__icon{font-size:1rem;line-height:1}.reading-expr-sidebar__title{color:var(--site-primary);margin:0;font-size:.98rem;font-weight:700}.reading-expr-sidebar__list{overscroll-behavior:contain;scrollbar-gutter:stable;flex:1;min-height:0;margin:0;padding:0;list-style:none;overflow-y:auto}.reading-expr-sidebar__item{border-bottom:1px solid color-mix(in srgb, var(--site-text) 6%, transparent);color:inherit;justify-content:space-between;align-items:center;gap:.75rem;padding:.8rem 1rem;text-decoration:none;transition:background .12s;display:flex}.reading-expr-sidebar__item:last-child{border-bottom:0}.reading-expr-sidebar__item:hover,.reading-expr-sidebar__item--active{background:color-mix(in srgb, var(--site-primary) 6%, var(--site-surface))}.reading-expr-sidebar__terms{flex-direction:column;gap:.15rem;min-width:0;display:flex}.reading-expr-sidebar__terms strong{color:var(--site-text);font-size:.9rem;font-weight:700}.reading-expr-sidebar__terms em{color:var(--site-muted);font-size:.82rem;font-style:italic}.reading-expr-sidebar__play{border:1px solid color-mix(in srgb, var(--site-text) 14%, transparent);width:1.75rem;height:1.75rem;color:var(--site-muted);border-radius:999px;flex-shrink:0;place-items:center;font-size:.62rem;display:grid}.reading-expr-sidebar__toggle{border:0;border-top:1px solid color-mix(in srgb, var(--site-text) 8%, transparent);background:color-mix(in srgb, var(--site-text) 3%, var(--site-surface));width:100%;color:var(--site-primary);cursor:pointer;padding:.75rem 1rem;font-size:.85rem;font-weight:600}.reading-expr-sidebar__toggle:hover{background:color-mix(in srgb, var(--site-text) 6%, var(--site-surface))}.lesson-hero--reading .lesson-hero__grid{display:block}.lesson-hero--reading .lesson-hero__title{margin-bottom:.65rem}.reading-hero-badge{background:color-mix(in srgb, var(--site-primary) 12%, var(--site-surface));color:var(--site-primary);letter-spacing:.04em;vertical-align:middle;border-radius:999px;align-items:center;margin-left:.65rem;padding:.15rem .55rem;font-size:.72rem;font-weight:700;display:inline-flex}