/* Знакомство: движущиеся копии экранов. Базовые стили — конечное состояние; анимации только «вылетают» из скрытого, поэтому при отключённой анимации всё видно сразу. */
html.showcase-open,html.showcase-open body{overflow:hidden}
.showcase{position:fixed;inset:0;z-index:400;display:flex;flex-direction:column;padding:calc(env(safe-area-inset-top,0px) + 14px) 16px calc(env(safe-area-inset-bottom,0px) + 16px);background:color-mix(in srgb,var(--fd-bg,#09090b) 90%,transparent);color:var(--fd-text,#fff);backdrop-filter:blur(22px) saturate(1.2);-webkit-backdrop-filter:blur(22px) saturate(1.2);animation:sc-in .45s cubic-bezier(.2,.8,.2,1) both;overflow:hidden}
.showcase.leaving{animation:sc-out .32s ease-in both}
@keyframes sc-in{from{opacity:0;transform:scale(1.03)}to{opacity:1;transform:none}}
@keyframes sc-out{to{opacity:0;transform:scale(.98)}}
.showcase-glow{position:absolute;inset:-20%;pointer-events:none;z-index:0;background:radial-gradient(40% 32% at 22% 18%,hsl(232 90% 62%/.38),transparent 70%),radial-gradient(38% 30% at 82% 70%,hsl(300 80% 60%/.28),transparent 70%),radial-gradient(30% 26% at 50% 100%,hsl(190 90% 55%/.22),transparent 70%);filter:hue-rotate(calc(var(--turn,0)*1deg));transition:filter 1.2s ease;animation:sc-drift 14s ease-in-out infinite alternate}
@keyframes sc-drift{from{transform:translate3d(-2%,-1%,0) scale(1)}to{transform:translate3d(3%,2%,0) scale(1.08)}}
.showcase>*{position:relative;z-index:1}
.showcase-bars{display:flex;gap:5px;margin:2px 44px 12px 0}
.showcase-seg{flex:1;height:3px;border-radius:3px;background:color-mix(in srgb,var(--fd-text,#fff) 18%,transparent);overflow:hidden}
.showcase-seg i{display:block;height:100%;width:100%;background:var(--fd-text,#fff);transform:scaleX(0);transform-origin:left}
.showcase-seg.done i{transform:scaleX(1)}
.showcase-close{position:absolute!important;top:calc(env(safe-area-inset-top,0px) + 6px);right:12px;width:40px;height:40px;border-radius:50%;border:1px solid var(--fd-border,#ffffff33);background:color-mix(in srgb,var(--fd-surface,#141414) 80%,transparent);color:inherit;font-size:22px;line-height:1;cursor:pointer}
.showcase-stage{position:relative;flex:1;min-height:0;margin:4px auto 10px;width:100%;max-width:440px;touch-action:pan-y}
.showcase-scene{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;gap:12px;padding:2px 2px 6px;transition:opacity .5s ease,transform .55s cubic-bezier(.2,.8,.2,1),filter .5s ease;overflow:hidden}
.showcase-scene.enter.from-right{opacity:0;transform:translateX(36px) scale(.97);filter:blur(6px)}
.showcase-scene.enter.from-left{opacity:0;transform:translateX(-36px) scale(.97);filter:blur(6px)}
.showcase-scene.leave-left{opacity:0;transform:translateX(-36px) scale(.97);filter:blur(6px);pointer-events:none}
.showcase-scene.leave-right{opacity:0;transform:translateX(36px) scale(.97);filter:blur(6px);pointer-events:none}
.showcase-copy{max-width:440px;width:100%;margin:0 auto;transition:opacity .16s,transform .16s}
.showcase-copy.swap{opacity:0;transform:translateY(8px)}
.showcase-copy h2{margin:0 0 6px;font-size:24px;line-height:1.2}
.showcase-copy p{margin:0;color:var(--fd-muted,#aaa);font-size:15px;line-height:1.5;min-height:4.5em}
.showcase-actions{display:flex;gap:10px;max-width:440px;width:100%;margin:14px auto 0}
.showcase-actions button{flex:1;min-height:48px}
.showcase-actions .showcase-cta{flex:2}
.showcase-actions button[hidden]{display:none}
/* сцены */
.sc-h{margin:0;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--fd-muted,#aaa);animation:sc-rise .5s both}
.sc-list{display:flex;flex-direction:column;gap:10px}
.sc-card{animation:sc-rise .6s cubic-bezier(.2,.8,.2,1) both;animation-delay:var(--d,0s);margin:0!important}
.sc-card.fd-lesson-card{padding-bottom:12px!important}
@keyframes sc-rise{from{opacity:0;transform:translateY(22px) scale(.985)}to{opacity:1;transform:none}}
.sc-strip{display:flex;justify-content:space-between;gap:4px;padding:6px;border:1px solid var(--fd-border,#ffffff26);border-radius:22px;background:color-mix(in srgb,var(--fd-surface,#141414) 70%,transparent);animation:sc-rise .5s both}
.sc-day{flex:1;display:grid;place-items:center;gap:2px;padding:6px 0;border-radius:16px;transition:background .5s,transform .5s;color:var(--fd-muted,#aaa)}
.sc-day small{font-size:11px}.sc-day b{font-size:18px;color:var(--fd-text,#fff)}
.sc-day.on{background:color-mix(in srgb,var(--fd-text,#fff) 14%,transparent);transform:translateY(-2px) scale(1.06);box-shadow:0 6px 18px #0004}
.sc-live{outline:1.5px solid hsl(150 70% 55%/.8);animation:sc-rise .6s both}
.sc-progress{margin-top:10px;display:grid;gap:4px}
.sc-progress span{display:block;height:5px;border-radius:5px;background:linear-gradient(90deg,hsl(150 70% 55%),hsl(190 80% 60%));transform-origin:left;animation:sc-fill 3.4s ease-out .5s both;width:62%}
@keyframes sc-fill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.sc-progress em{font-size:12px;font-style:normal;color:var(--fd-muted,#aaa)}
.sc-pager{position:relative;flex:none;height:300px;overflow:hidden}
.sc-page{position:absolute;inset:0;transition:transform .7s cubic-bezier(.2,.8,.2,1),opacity .6s}
.sc-page.sc-next{transform:translateX(105%);opacity:0}
.sc-pager.go .sc-page:not(.sc-next){transform:translateX(-105%);opacity:0}
.sc-pager.go .sc-page.sc-next{transform:none;opacity:1}
.sc-finger{position:absolute;right:26px;bottom:34px;font-size:34px;animation:sc-swipe 1.7s ease-in-out .3s both;filter:drop-shadow(0 6px 10px #0006)}
@keyframes sc-swipe{0%{opacity:0;transform:translateX(30px)}20%{opacity:1}70%{opacity:1;transform:translateX(-90px)}100%{opacity:0;transform:translateX(-110px)}}
.sc-note{margin:10px 0 0!important;min-height:3.4em}
.sc-files{display:flex;flex-wrap:wrap;gap:8px}
.sc-file{padding:8px 12px;border-radius:999px;border:1px solid var(--fd-border,#ffffff2b);background:color-mix(in srgb,var(--fd-surface,#141414) 75%,transparent);font-size:13px;animation:sc-pop .5s cubic-bezier(.3,1.5,.5,1) both;animation-delay:var(--d,2s)}
@keyframes sc-pop{from{opacity:0;transform:scale(.6) translateY(10px)}to{opacity:1;transform:none}}
.sc-share{align-self:flex-start;padding:6px 12px;border-radius:999px;font-size:12px;background:hsl(150 70% 40%/.25);border:1px solid hsl(150 70% 55%/.5);animation:sc-pop .5s 3.6s both}
.sc-deadline{display:flex;align-items:center;gap:14px;padding:14px!important}
.sc-ring{position:relative;width:54px;height:54px;border-radius:50%;display:grid;place-items:center;flex:none;background:conic-gradient(var(--ring) calc(var(--fill)*360deg),color-mix(in srgb,var(--fd-text,#fff) 12%,transparent) 0);animation:sc-ring 1.4s ease-out both;animation-delay:var(--d,0s)}
.sc-ring::before{content:'';position:absolute;inset:5px;border-radius:50%;background:var(--fd-surface,#141414)}
.sc-ring b,.sc-ring small{position:relative;line-height:1}.sc-ring b{font-size:18px}.sc-ring small{font-size:9px;margin-top:-10px;color:var(--fd-muted,#aaa)}
.sc-ring{grid-template-rows:auto}.sc-ring small{position:absolute;bottom:9px}
@keyframes sc-ring{from{transform:rotate(-120deg) scale(.6);opacity:0}to{transform:none;opacity:1}}
.sc-deadline-copy{display:grid;gap:3px}
.sc-chat{display:flex;flex-direction:column;gap:10px}
.sc-bubble{max-width:86%;padding:12px 14px;border-radius:18px;font-size:15px;line-height:1.4;display:grid;gap:4px;min-height:44px}
.sc-bubble.me{align-self:flex-end;background:color-mix(in srgb,var(--fd-text,#fff) 92%,transparent);color:var(--fd-bg,#09090b);border-bottom-right-radius:6px}
.sc-bubble.bot{align-self:flex-start;background:color-mix(in srgb,var(--fd-surface,#141414) 85%,transparent);border:1px solid var(--fd-border,#ffffff2b);border-bottom-left-radius:6px}
.sc-bubble.me:empty{display:none}
.sc-dots{display:none;grid-auto-flow:column;gap:5px;width:64px}.sc-dots.show{display:grid;animation:sc-pop .3s both}
.sc-dots i{width:8px;height:8px;border-radius:50%;background:var(--fd-muted,#aaa);animation:sc-blink 1s ease-in-out infinite}.sc-dots i:nth-child(2){animation-delay:.15s}.sc-dots i:nth-child(3){animation-delay:.3s}
@keyframes sc-blink{50%{opacity:.25;transform:translateY(-3px)}}
.sc-answer{display:none}.sc-answer.show{display:grid;animation:sc-pop .5s cubic-bezier(.3,1.4,.5,1) both}
.sc-teacher{display:flex;align-items:center;gap:12px;animation:sc-rise .5s .1s both}
.sc-teacher div{display:grid;gap:2px}
.sc-avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-weight:700;background:color-mix(in srgb,var(--fd-text,#fff) 14%,transparent);border:1px solid var(--fd-border,#ffffff33);flex:none}
.sc-stars{display:flex;gap:6px;font-size:30px;color:color-mix(in srgb,var(--fd-text,#fff) 22%,transparent)}
.sc-star{animation:sc-star .5s cubic-bezier(.3,1.6,.5,1) both;animation-delay:var(--d,0s);color:#f5b942;text-shadow:0 0 14px #f5b94266}
.sc-star.half{color:color-mix(in srgb,var(--fd-text,#fff) 30%,#f5b942)}
@keyframes sc-star{from{opacity:0;transform:scale(.2) rotate(-60deg)}to{opacity:1;transform:none}}
.sc-bars{display:grid;gap:10px}
.sc-bar{display:grid;grid-template-columns:96px 1fr 34px;align-items:center;gap:10px;font-size:14px}
.sc-bar i{height:8px;border-radius:8px;background:color-mix(in srgb,var(--fd-text,#fff) 12%,transparent);position:relative;overflow:hidden}
.sc-bar i::after{content:'';position:absolute;inset:0;width:var(--v);border-radius:8px;background:linear-gradient(90deg,hsl(232 90% 66%),hsl(190 90% 60%));transform-origin:left;animation:sc-fill 1.2s cubic-bezier(.2,.8,.2,1) both;animation-delay:var(--d,0s)}
.sc-review{padding:14px;border-radius:18px;border:1px solid var(--fd-border,#ffffff2b);background:color-mix(in srgb,var(--fd-surface,#141414) 80%,transparent);font-size:15px;line-height:1.45;animation:sc-rise .7s 2.2s cubic-bezier(.2,.8,.2,1) both}
.sc-chips{display:flex;gap:8px;flex-wrap:wrap}
.sc-chip{padding:8px 14px;border-radius:999px;border:1px solid var(--fd-border,#ffffff2b);font-size:14px;color:var(--fd-muted,#aaa);transition:background .4s,color .4s,transform .4s}
.sc-chip.on{background:var(--fd-text,#fff);color:var(--fd-bg,#09090b);transform:scale(1.05)}
.sc-row{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:16px;border:1px solid var(--fd-border,#ffffff26);background:color-mix(in srgb,var(--fd-surface,#141414) 78%,transparent);animation:sc-rise .55s both;animation-delay:var(--d,0s)}
.sc-row strong{flex:1;font-size:15px}.sc-icon{font-size:22px}
.sc-upload{display:grid;gap:6px;font-size:13px;color:var(--fd-muted,#aaa);animation:sc-rise .5s 1.1s both}
.sc-upload i{height:5px;border-radius:5px;background:linear-gradient(90deg,hsl(150 70% 55%),hsl(190 80% 60%));transform-origin:left;animation:sc-fill 3s ease-in-out 1.3s both}
.sc-qr{display:grid;grid-template-columns:repeat(17,1fr);width:min(62%,230px);aspect-ratio:1;padding:12px;margin:0 auto;border-radius:18px;background:#fff;animation:sc-pop .6s both;position:relative}
.sc-qr i{grid-column:calc(var(--x) + 1);grid-row:calc(var(--y) + 1);background:#0a0a0c;border-radius:1.5px;animation:sc-cell .35s ease-out both;animation-delay:var(--d,0s)}
@keyframes sc-cell{from{opacity:0;transform:scale(0)}to{opacity:1;transform:none}}
.sc-link{align-self:center;padding:8px 14px;border-radius:999px;background:color-mix(in srgb,var(--fd-surface,#141414) 85%,transparent);border:1px solid var(--fd-border,#ffffff2b);font-size:13px;font-family:ui-monospace,Menlo,monospace;min-height:34px}
.sc-people{display:flex;justify-content:center}
.sc-people .sc-avatar{margin-left:-10px;width:38px;height:38px;font-size:14px;background:hsl(var(--hue) 60% 45%/.9);color:#fff;border:2px solid var(--fd-bg,#09090b)}
.sc-pop{animation:sc-pop .5s cubic-bezier(.3,1.6,.5,1) both;animation-delay:var(--d,0s)}
.sc-count{text-align:center;margin:0}
.sc-dim .sc-card{opacity:.92}
.sc-toast{position:absolute;left:0;right:0;top:0;z-index:3;display:grid;gap:2px;padding:12px 16px;border-radius:18px;background:color-mix(in srgb,var(--fd-surface,#141414) 92%,transparent);border:1px solid var(--fd-border,#ffffff33);box-shadow:0 14px 34px #0006;animation:sc-toast 5s cubic-bezier(.2,.9,.3,1) .4s both}
@keyframes sc-toast{0%{transform:translateY(-120%);opacity:0}12%,70%{transform:none;opacity:1}100%{transform:translateY(-120%);opacity:0}}
.sc-toast+.sc-h{margin-top:4px}
.sc-offline{margin-top:auto;padding:10px 14px;border-radius:14px;background:#2b2412;color:#ffe9a8;border:1px solid #6b5a22;font-size:14px;text-align:center;animation:sc-rise .6s 2.4s both}
.sc-logo{width:132px;height:132px;margin:auto;border-radius:50%;animation:sc-pop .7s cubic-bezier(.3,1.5,.5,1) both;filter:drop-shadow(0 12px 30px #0008)}
.sc-pulse{position:absolute;left:50%;top:50%;width:132px;height:132px;margin:-66px 0 0 -66px;border-radius:50%;border:2px solid var(--fd-text,#fff);opacity:0;animation:sc-ping 2.2s ease-out .5s infinite}
@keyframes sc-ping{from{opacity:.7;transform:scale(1)}to{opacity:0;transform:scale(2.6)}}
.sc-welcome{text-align:center;font-size:34px;font-weight:800;margin:0;animation:sc-rise .6s .5s both}
@media (prefers-reduced-motion:reduce){.showcase *,.showcase{animation:none!important;transition:none!important}.sc-pager.go .sc-page:not(.sc-next){display:none}.sc-finger,.sc-toast,.sc-pulse{display:none}}
@media (max-height:700px){.showcase-copy p{min-height:0}.showcase-copy h2{font-size:21px}}
.showcase-actions button{white-space:nowrap;padding-left:12px;padding-right:12px}
.showcase-actions .showcase-alt{flex:.9}
.showcase-actions .showcase-cta{flex:2}
/* формы: поля оживают по очереди */
.sc-form{display:flex;flex-direction:column;gap:7px;overflow:hidden}
.sc-field{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:center;gap:10px;padding:9px 12px;border-radius:14px;border:1px solid var(--fd-border,#ffffff26);background:color-mix(in srgb,var(--fd-surface,#141414) 78%,transparent);animation:sc-rise .5s both;animation-delay:var(--d,0s);transition:border-color .3s,box-shadow .3s}
.sc-field small{font-size:12px;line-height:1.25;color:var(--fd-muted,#aaa)}
.sc-field.focus{border-color:hsl(232 90% 66%);box-shadow:0 0 0 3px hsl(232 90% 66%/.18)}
.sc-value{min-height:1.3em;font-size:14px;line-height:1.3;overflow-wrap:anywhere}
.sc-field.focus .sc-value:not(.sc-switch):not(.sc-chips-inline)::after{content:'';display:inline-block;width:1.5px;height:1em;margin-left:2px;vertical-align:-2px;background:currentColor;animation:sc-blink 1s steps(2) infinite}
.sc-chosen{animation:sc-pop .4s cubic-bezier(.3,1.5,.5,1) both}
.sc-kind-select .sc-value.sc-chosen::after{content:' ▾';color:var(--fd-muted,#aaa)}
.sc-switch{justify-self:end;position:relative;width:42px;height:24px;border-radius:24px;background:color-mix(in srgb,var(--fd-text,#fff) 18%,transparent);transition:background .35s}
.sc-switch i{position:absolute;left:3px;top:3px;width:18px;height:18px;border-radius:50%;background:var(--fd-text,#fff);transition:transform .35s cubic-bezier(.3,1.5,.5,1)}
.sc-field.on .sc-switch{background:hsl(150 65% 45%)}
.sc-field.on .sc-switch i{transform:translateX(18px)}
.sc-chips-inline{display:flex;gap:5px;flex-wrap:wrap;justify-content:flex-end}
.sc-chips-inline em{font-style:normal;font-size:12px;padding:4px 9px;border-radius:999px;border:1px solid var(--fd-border,#ffffff2b);color:var(--fd-muted,#aaa);transition:background .4s,color .4s,transform .4s}
.sc-chips-inline em.on{background:var(--fd-text,#fff);color:var(--fd-bg,#09090b);transform:scale(1.06)}
.sc-kind-area{align-items:start}
@media (max-width:380px){.sc-field{grid-template-columns:1fr;gap:3px}.sc-chips-inline,.sc-switch{justify-self:start;justify-content:flex-start}}