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var(--w-line-soft)}.k-side{background:var(--w-white);padding:var(--w-space-5);position:sticky;inset-block-start:69px;max-block-size:calc(100vh - 69px);overflow-y:auto}.k-side__head{display:flex;gap:var(--w-space-3);align-items:center;margin-block-end:var(--w-space-4)}.k-side__cover{inline-size:64px;block-size:64px;border-radius:var(--w-radius-sm);overflow:hidden;flex:none}.k-side__cover .k-cover{font-size:1.6rem}.k-side__name{font-size:1.15rem;margin:0;line-height:1.3}.k-side__teacher{font-size:var(--w-fs-small);color:var(--w-taupe);margin:0}.k-side__progress{margin-block-end:var(--w-space-4)}.k-side__close{display:none}.k-search{position:relative;margin-block-end:var(--w-space-4)}.k-search svg{position:absolute;inset-inline-start:var(--w-space-3);inset-block-start:50%;transform:translateY(-50%);inline-size:18px;block-size:18px;color:var(--w-taupe);pointer-events:none}.k-search input{inline-size:100%;min-height:42px;border:1px solid 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var(--w-line-soft)}.k-file__icon{inline-size:40px;block-size:40px;border-radius:var(--w-radius-sm);background:var(--w-rose-pale);color:var(--w-coral-text);display:grid;place-items:center;flex:none}.k-file__icon svg{inline-size:20px;block-size:20px}.k-file__name{flex:1;min-width:0;font-weight:600;color:var(--w-ink);overflow-wrap:anywhere}.k-file__size{display:block;font-weight:400;font-size:0.82rem;color:var(--w-taupe)}.k-pager{display:grid;grid-template-columns:1fr 1fr;gap:var(--w-space-4);margin-block-start:var(--w-space-6)}.k-pager__link{display:flex;align-items:center;gap:var(--w-space-3);padding:var(--w-space-4);border:1px solid var(--w-line);border-radius:var(--w-radius-md);background:var(--w-white);min-width:0}.k-pager__link svg{inline-size:20px;block-size:20px;flex:none;color:var(--w-taupe)}.k-pager__link:hover{border-color:var(--w-taupe)}.k-pager__link--next{grid-column:2;justify-content:flex-end;text-align:end}.k-pager__link.is-locked{opacity:0.65}.k-pager__label{display:block;font-size:0.8rem;color:var(--w-taupe)}.k-pager__name{display:block;font-weight:600;color:var(--w-ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.k-pager__text{min-width:0}.k-dock{position:sticky;inset-block-end:0;z-index:5;display:flex;align-items:center;gap:var(--w-space-3);margin-block-start:var(--w-space-6);padding:12px var(--w-space-4) calc(12px + env(safe-area-inset-bottom, 0px));background:var(--w-white);border-block-start:1px solid var(--w-line);border-radius:var(--w-radius-md) var(--w-radius-md) 0 0}@supports (background: color-mix(in oklch, red, blue)){.k-dock{background:color-mix(in oklch, var(--w-white) 94%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}}.k-dock 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100%;order:-1;margin:0;padding:var(--w-space-2) var(--w-space-4)}.k-dock .k-done-msg a{display:none}.k-note{inline-size:100%;min-block-size:140px;resize:vertical;border:1px solid var(--w-line);border-radius:var(--w-radius-sm);background:var(--w-cream);padding:var(--w-space-3) var(--w-space-4);font:inherit;color:var(--w-ink);line-height:1.6}.k-note-state{font-size:0.82rem;color:var(--w-taupe);min-block-size:1.3em;margin-block-start:var(--w-space-1)}.k-comments{list-style:none;margin:0 0 var(--w-space-5);padding:0}.k-comment{display:grid;grid-template-columns:38px 1fr;gap:var(--w-space-3);padding-block:var(--w-space-4)}.k-comment+.k-comment{border-block-start:1px solid var(--w-line-soft)}.k-comment__who{font-weight:700;color:var(--w-ink);font-size:0.95rem}.k-comment__when{font-size:0.8rem;color:var(--w-taupe);margin-inline-start:var(--w-space-2)}.k-comment__staff{font-size:0.75rem;font-weight:700;background:var(--w-rose-pale);color:var(--w-coral-text);border-radius:999px;padding:1px 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0;color:var(--w-ink);font-weight:600;direction:ltr;text-align:end;unicode-bidi:isolate}.k-soon__icon{display:inline-grid;place-items:center;inline-size:56px;block-size:56px;border-radius:50%;background:var(--w-sand);color:var(--w-coral-text);margin-block-end:var(--w-space-3)}.k-soon__icon svg{inline-size:26px;block-size:26px}@media (max-width:980px){.k-lesson__layout{grid-template-columns:minmax(0, 1fr)}.k-side-wrap{display:contents}.k-toc-btn{display:inline-flex}.k-side{position:fixed;inset-block:0;inset-inline-start:0;z-index:60;inline-size:min(360px, 88vw);max-block-size:none;block-size:100%;transform:translateX(100%);visibility:hidden;transition:transform 0.25s ease, visibility 0.25s;box-shadow:var(--w-shadow-lift)}.k-side.is-open{transform:none;visibility:visible}[dir="ltr"] .k-side{transform:translateX(-100%)}[dir="ltr"] .k-side.is-open{transform:none}.k-side__close{display:inline-flex;margin-inline-start:auto}.k-scrim{position:fixed;inset:0;z-index:55;background:oklch(0.2 0.01 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var(--w-space-6);font-size:var(--w-fs-small);color:var(--w-taupe);flex-wrap:wrap}.k-steps__item{display:flex;align-items:center;gap:var(--w-space-2)}.k-steps__num{width:26px;height:26px;border-radius:50%;border:1px solid var(--w-line);display:grid;place-items:center;font-size:0.8rem;background:var(--w-white)}.k-steps__num svg{width:12px;height:12px}.k-steps__item.is-current{color:var(--w-ink);font-weight:600}.k-steps__item.is-current .k-steps__num{background:var(--w-rose);border-color:var(--w-rose);color:var(--w-white)}.k-steps__item.is-done .k-steps__num{background:var(--w-success-bg);border-color:var(--w-success-bg);color:var(--w-success)}.k-buy__note{color:var(--w-taupe);font-size:var(--w-fs-small);margin:var(--w-space-2) 0 0}.k-buy__form .w-field__hint:empty{display:none}.k-coupon{display:grid;grid-template-columns:1fr auto;gap:var(--w-space-3);align-items:end}.k-coupon__field{margin:0}.k-coupon__btn{height:48px}.k-coupon__msg{grid-column:1 / -1}.k-coupon__msg.is-ok{color:var(--w-success)}.k-buy__installments{max-width:320px}.k-buy__terms{margin-top:var(--w-space-5)}.k-buy__terms a{color:var(--w-ink);text-decoration:underline}.k-buy__actions{margin-top:var(--w-space-6)}.k-buy__secure,.k-pay__secure{display:flex;gap:var(--w-space-2);align-items:flex-start;color:var(--w-taupe);font-size:var(--w-fs-small);margin:var(--w-space-3) 0 0}.k-buy__secure svg,.k-pay__secure svg{width:16px;height:16px;flex:none;margin-top:2px}.k-summary{background:var(--w-white);border:1px solid var(--w-line-soft);border-radius:var(--w-radius-lg);box-shadow:var(--w-shadow-sm);overflow:hidden;position:sticky;top:var(--w-space-5)}.k-summary__media{aspect-ratio:1.7777777778;background:var(--w-sand)}.k-summary__media img{width:100%;height:100%;object-fit:cover;display:block}.k-summary__body{padding:var(--w-space-5)}.k-summary__name{font-family:var(--w-font-display);font-size:var(--w-fs-h4);color:var(--w-ink);margin-top:var(--w-space-1)}.k-summary__teacher{color:var(--w-taupe);font-size:var(--w-fs-small)}.k-summary__lines{margin:var(--w-space-4) 0 0;padding:0}.k-summary__lines>div[hidden]{display:none}.k-summary__lines>div{display:flex;justify-content:space-between;gap:var(--w-space-3);padding:var(--w-space-2) 0;border-top:1px solid var(--w-line-soft)}.k-summary__lines dt{color:var(--w-body)}.k-summary__lines dd{margin:0;color:var(--w-ink)}.k-summary__lines s{color:var(--w-taupe);margin-inline-end:var(--w-space-1)}.k-summary__discount dd{color:var(--w-success)}.k-summary__total{font-weight:700;font-size:1.1rem}.k-summary__note{color:var(--w-taupe);font-size:var(--w-fs-small);margin:var(--w-space-3) 0 0}.k-pay{max-width:640px;margin:0 auto;background:var(--w-white);border:1px solid var(--w-line-soft);border-radius:var(--w-radius-lg);padding:var(--w-space-6);box-shadow:var(--w-shadow-sm)}.k-pay__title{font-family:var(--w-font-display);font-size:var(--w-fs-h2);color:var(--w-ink);margin:var(--w-space-1) 0}.k-pay__total{font-size:var(--w-fs-h3);color:var(--w-ink)}.k-pay__total small{font-size:var(--w-fs-small);color:var(--w-taupe)}.k-pay__text{color:var(--w-body);margin:var(--w-space-4) 0}.k-pay__frame{margin:var(--w-space-5) 0 0}.k-pay__frame iframe{width:100%;min-height:560px;border:0;border-radius:var(--w-radius-md)}.k-pay__actions,.k-sandbox__actions{display:flex;gap:var(--w-space-3);flex-wrap:wrap;margin-top:var(--w-space-5)}.k-thanks .w-thankyou__icon.is-failed{background:var(--w-error-bg);color:var(--w-error)}.k-sandbox .w-alert{margin-bottom:var(--w-space-5)}@media (max-width:860px){.k-summary{position:static;order:-1}.k-coupon{grid-template-columns:1fr}}