/* Tiffany Cakes Academy — the learning screen (lessons, quizzes, projects). */
.lx-body{background:var(--cream)}
.lx-body::before{display:none}
.lx{min-height:100vh;display:flex;flex-direction:column}
.lx__top{position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:10px;padding:8px 12px;padding-top:calc(8px + env(safe-area-inset-top));background:#fff;border-bottom:1px solid var(--line);min-height:64px}
.lx__back{flex:none;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--deep);background:var(--petal)}
.lx__ctitle{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.25}
.lx__ctitle small{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--rose);font-weight:700}
.lx__ctitle strong{font-family:var(--font-head);font-size:1.02rem;color:var(--deep);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ring{--p:0;flex:none;width:46px;height:46px;border-radius:50%;background:conic-gradient(var(--berry) calc(var(--p)*1%),var(--petal) 0);display:flex;align-items:center;justify-content:center}
.ring span{width:36px;height:36px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;color:var(--berry)}
.lx__menu{flex:none;display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--deep);font-weight:700;font-size:.9rem;cursor:pointer}
.lx__preview{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--peach-soft);padding:10px 16px;font-size:.93rem;color:var(--deep)}
.lx__preview .btn{margin-left:auto}
.lx__grid{flex:1;display:grid;grid-template-columns:minmax(0,1fr)}
.lx__main{padding:0 0 40px;min-width:0}
.lx__head{padding:18px 16px 4px}
.lx__head h1{font-size:clamp(1.45rem,5.6vw,2.1rem);margin:.2em 0 .5em}
.lx__kind{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:.86rem;color:var(--muted);margin:0;font-weight:500}
.lx__kind .ico{color:var(--rose)}
.lx__acts{display:grid;grid-template-columns:1fr;gap:10px;margin:4px 0 8px}
.lx__acts .btn.is-done{color:var(--ok);border-color:#CFE8D8;background:#EAF6EE}
.lx__main>.alert,.lx__main>.feedback,.lx__main>.pblock,.lx__main>.lnotes,.lx__main>form,.lx__main>.qresult,.lx__main>.btn,.lx__main>p{margin-left:16px;margin-right:16px}

/* ---- Player ---- */
.player{position:relative;background:#1B0E15;aspect-ratio:16/9;width:100%;overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.player__stage{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.player video,.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000;object-fit:contain}
.player__start{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border:0;background:radial-gradient(circle at 50% 45%,color-mix(in srgb,var(--berry) 60%,#000),#1B0E15);color:#fff;font-weight:700;font-size:1.02rem;cursor:pointer;width:100%}
.player__big{width:82px;height:82px;border-radius:50%;background:#fff;color:var(--berry);display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 12px rgba(255,255,255,.14)}
.player__big svg{fill:currentColor;margin-left:5px}
.player__empty{color:rgba(255,255,255,.8);text-align:center;padding:20px;display:flex;flex-direction:column;align-items:center;gap:10px}
.player__empty p{margin:0;max-width:30ch}
.player__shield{position:absolute;inset:0 0 58px 0;z-index:2}
.player__mark{position:absolute;z-index:3;left:10%;top:12%;color:rgba(255,255,255,.55);font-size:clamp(.72rem,2.4vw,.95rem);font-weight:700;letter-spacing:.04em;pointer-events:none;text-shadow:0 1px 2px rgba(0,0,0,.6);transition:left 1.2s ease,top 1.2s ease;white-space:nowrap}
.player__ctrl{position:absolute;left:0;right:0;bottom:0;z-index:4;display:flex;align-items:center;gap:6px;padding:8px 10px;background:linear-gradient(transparent,rgba(0,0,0,.72));transition:opacity .3s}
.player.is-idle .player__ctrl{opacity:0}
.player__ctrl button{flex:none;width:42px;height:42px;border:0;border-radius:50%;background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;font-weight:700;font-size:.82rem}
.player__ctrl button:hover{background:rgba(255,255,255,.14)}
.player__ctrl .ctrl-play svg{fill:currentColor}
.player__time{color:#fff;font-size:.78rem;font-variant-numeric:tabular-nums;white-space:nowrap;min-width:78px;text-align:center}
.player__seek{flex:1;min-width:40px;height:30px;display:flex;align-items:center;cursor:pointer;touch-action:none}
.player__seek span{position:relative;display:block;width:100%;height:5px;border-radius:5px;background:rgba(255,255,255,.3)}
.player__seek i{position:absolute;left:0;top:0;bottom:0;border-radius:5px;background:linear-gradient(90deg,var(--rose),#fff);width:0}
.player__seek b{position:absolute;top:50%;width:15px;height:15px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);left:0;box-shadow:0 1px 4px rgba(0,0,0,.4)}
.player__center{position:absolute;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;pointer-events:none}
.player__center span{width:70px;height:70px;border-radius:50%;background:rgba(255,255,255,.92);color:var(--berry);display:none;align-items:center;justify-content:center}
.player__center span svg{fill:currentColor;margin-left:4px}
.player.is-paused .player__center span{display:flex}
.player__msg{position:absolute;inset:0;z-index:5;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;padding:20px;background:rgba(27,14,21,.85)}
.player__spin{position:absolute;z-index:3;width:44px;height:44px;border-radius:50%;border:4px solid rgba(255,255,255,.25);border-top-color:#fff;animation:spin .8s linear infinite;display:none}
.player.is-loading .player__spin{display:block}
.player.is-full{position:fixed;inset:0;z-index:500;aspect-ratio:auto;height:100%;height:100dvh}
.player.is-full video{object-fit:contain}
body.is-fullplayer{overflow:hidden}

/* ---- Tabs ---- */
.ltabs{padding:6px 16px 0}
.ltabs__btns{margin:0 -16px 8px;padding-left:16px;padding-right:16px}
.ltabs__btns .chip{cursor:pointer;border:1px solid var(--line);font:inherit;font-size:.93rem;font-weight:700}
.ltabs__panel{display:none;background:#fff;border-radius:var(--r);padding:20px 18px;box-shadow:var(--shadow-sm)}
.ltabs__panel.is-on{display:block}
.lnotes{font-size:1.02rem;line-height:1.7}
.lnotes>:last-child{margin-bottom:0}
.lnotes ul{padding-left:20px}
.qa__form{display:grid;gap:10px;margin-bottom:18px}
.qa__form textarea{width:100%;border:1.5px solid var(--line);border-radius:16px;padding:14px;font-size:1.02rem;min-height:92px;resize:vertical}
.qa__form .btn{justify-self:start}
.qa{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.qa__item{display:grid;grid-template-columns:40px 1fr;gap:12px}
.qa__av{width:40px;height:40px;border-radius:50%;background:var(--petal);color:var(--berry);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.qa__item.is-staff>.qa__av{background:var(--berry);color:#fff}
.qa__who{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 4px;font-size:.95rem}
.qa__who small{color:var(--muted);font-size:.8rem}
.qa__tag{background:var(--gold-soft);color:var(--gold-dark);font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:999px}
.qa__text p{margin:0 0 6px}
.qa__replies{list-style:none;margin:10px 0 0;padding:12px 0 0 0;border-top:1px dashed var(--line);display:grid;gap:12px}

/* ---- Quiz ---- */
.quiz__facts{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}
.quiz__facts span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.86rem;font-weight:500}
.quiz__intro{background:#fff;border-radius:var(--r);padding:16px 18px;margin-bottom:14px;box-shadow:var(--shadow-sm)}
.quiz{display:grid;gap:14px}
.quiz__timer{position:sticky;top:72px;z-index:5;justify-self:end;display:inline-flex;align-items:center;gap:8px;background:var(--deep);color:#fff;border-radius:999px;padding:8px 14px;font-weight:700;margin:0}
.qcard{border:0;margin:0;background:#fff;border-radius:var(--r);padding:18px 16px;box-shadow:var(--shadow-sm);min-width:0}
.qcard legend{display:flex;gap:10px;align-items:flex-start;font-weight:700;font-size:1.08rem;color:var(--deep);line-height:1.4;padding:0;float:left;width:100%;margin-bottom:12px}
.qcard__n{flex:none;width:30px;height:30px;border-radius:50%;background:var(--petal);color:var(--berry);display:flex;align-items:center;justify-content:center;font-size:.88rem}
.qcard__hint{clear:both;margin:0 0 8px;font-size:.86rem;color:var(--muted)}
.qcard__opts{clear:both;display:grid;gap:9px}
.qopt{display:flex;align-items:center;gap:12px;border:1.5px solid var(--line);border-radius:16px;padding:14px;cursor:pointer;min-height:56px;transition:border-color .15s,background .15s;font-size:1rem}
.qopt input{position:absolute;opacity:0;width:1px;height:1px}
.qopt__box{flex:none;width:24px;height:24px;border-radius:50%;border:2px solid var(--berry-2);position:relative}
.qopt input[type=checkbox]+.qopt__box{border-radius:7px}
.qopt:has(input:checked){border-color:var(--berry);background:var(--petal)}
.qopt input:checked+.qopt__box{background:var(--berry);border-color:var(--berry)}
.qopt input:checked+.qopt__box::after{content:"";position:absolute;left:7px;top:3px;width:6px;height:11px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}
.qopt input:focus-visible+.qopt__box{outline:3px solid var(--rose);outline-offset:2px}
.qopt.is-right,.qopt.is-right:has(input:checked){border-color:var(--ok);background:#EAF6EE}
.qopt.is-wrong,.qopt.is-wrong:has(input:checked){border-color:var(--err);background:#FBE9E7}
.qcard.is-right{box-shadow:inset 4px 0 0 var(--ok),var(--shadow-sm)}
.qcard.is-wrong{box-shadow:inset 4px 0 0 var(--err),var(--shadow-sm)}
.qcard__why{margin:10px 0 0;font-size:.93rem;color:var(--deep);background:var(--cream);border-radius:12px;padding:10px 12px}
.quiz__foot{display:grid;gap:10px;margin-top:4px}
.qresult{background:#fff;border-radius:var(--r-lg);padding:26px 20px;text-align:center;box-shadow:var(--shadow);margin-top:16px}
.qresult__score{width:120px;height:120px;border-radius:50%;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;flex-direction:column;background:conic-gradient(var(--c,var(--ok)) calc(var(--p)*1%),var(--petal) 0);position:relative}
.qresult__score::before{content:"";position:absolute;inset:10px;border-radius:50%;background:#fff}
.qresult__score strong,.qresult__score small{position:relative}
.qresult__score strong{font-family:var(--font-head);font-size:2rem;color:var(--deep);line-height:1}
.qresult h2{font-size:1.6rem;margin-bottom:.3em}
.qresult .btn-row{justify-content:center;margin-top:14px}

/* ---- Project ---- */
.pblock{background:#fff;border-radius:var(--r);padding:20px 18px;box-shadow:var(--shadow-sm);margin-top:14px}
.pblock h2{font-size:1.3rem;margin:0 0 12px}
.rubric{display:grid;gap:8px}
.rubric__row{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;padding:12px 14px;background:var(--cream);border-radius:14px}
.rubric__row small{display:block;color:var(--muted);font-size:.86rem;margin-top:2px}
.rubric__row b{flex:none;color:var(--berry);font-family:var(--font-head);font-size:1.1rem}
.pphotos{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}
.pphotos img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:12px}
.pupload__drop{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;border:2px dashed var(--peach);border-radius:20px;padding:26px 16px;cursor:pointer;background:var(--cream);color:var(--berry)}
.pupload__drop input{position:absolute;opacity:0;width:1px;height:1px}
.pupload__drop small{color:var(--muted)}
.pupload__drop:focus-within{outline:3px solid var(--rose);outline-offset:2px}
.feedback{background:#fff;border-left:4px solid var(--gold);border-radius:14px;padding:14px 16px;margin-bottom:14px;box-shadow:var(--shadow-sm)}
.feedback strong{display:flex;gap:8px;align-items:center;color:var(--deep)}
.feedback p{margin:8px 0 0}
.form-msg{margin:10px 0 0;font-weight:500}
.form-msg.is-err{color:var(--err)}
.form-msg.is-ok{color:var(--ok)}

/* ---- Locked ---- */
.lx__lock{margin:30px 16px;background:#fff;border-radius:var(--r-lg);padding:30px 20px;text-align:center;box-shadow:var(--shadow)}
.lx__lock>.ico{margin:0 auto 10px;color:var(--rose)}
.lx__lock h1{font-size:1.6rem}

/* ---- Previous / next ---- */
.lx__pn{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:22px 16px 0}
.lx__pn-a{display:flex;align-items:center;gap:10px;background:#fff;border-radius:18px;padding:14px;text-decoration:none;color:var(--deep);box-shadow:var(--shadow-sm);font-size:.9rem;line-height:1.3;min-width:0}
.lx__pn-a span{min-width:0;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.lx__pn-a small{display:block;color:var(--rose);font-weight:700;font-size:.74rem;letter-spacing:.1em;text-transform:uppercase}
.lx__pn-a--next{justify-content:flex-end;text-align:right;grid-column:2}
.lx__pn-a .ico{flex:none;color:var(--berry)}

/* ---- Contents panel ---- */
.lx__side{position:fixed;left:0;right:0;bottom:0;z-index:120;max-height:82vh;background:#fff;border-radius:26px 26px 0 0;padding:10px 16px calc(20px + env(safe-area-inset-bottom));overflow-y:auto;transform:translateY(105%);transition:transform .3s var(--ease);box-shadow:0 -20px 50px -20px rgba(0,0,0,.35)}
.lx__side.is-open{transform:none}
.lx__scrim{position:fixed;inset:0;z-index:110;background:rgba(74,22,48,.4);display:none}
.lx__side.is-open+.lx__scrim{display:block}
.lx__sidehead{display:flex;align-items:center;justify-content:space-between;padding:6px 0 10px;position:sticky;top:-10px;background:#fff;z-index:2}
.lx__sidehead::before{content:"";position:absolute;left:50%;top:-4px;transform:translateX(-50%);width:44px;height:5px;border-radius:5px;background:var(--line)}
.lx__sidehead strong{font-family:var(--font-head);font-size:1.2rem;color:var(--deep)}
.lx__sideprog{margin:0 0 12px}
.lx__sideprog small{color:var(--muted);font-size:.84rem}
.lxt{margin-bottom:12px}
.lxt__title{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--deep);margin:10px 0 6px;font-size:.98rem}
.lxt__title span{flex:none;width:26px;height:26px;border-radius:50%;background:var(--petal);color:var(--berry);display:flex;align-items:center;justify-content:center;font-size:.8rem}
.lxt__items{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.lxi a,.lxi>span{display:flex;align-items:flex-start;gap:10px;padding:11px 10px;border-radius:14px;text-decoration:none;color:var(--ink);font-size:.95rem;line-height:1.35}
.lxi a:hover{background:var(--cream)}
.lxi__ico{color:var(--berry-2);margin-top:1px}
.lxi__t small{display:block;color:var(--muted);font-size:.8rem}
.lxi.is-on a{background:var(--petal);font-weight:700;color:var(--deep)}
.lxi.is-done .lxi__ico{color:var(--ok)}
.lxi.is-locked>span{color:var(--muted)}
.lxi em.pill{font-style:normal;font-size:.7rem;padding:1px 7px}

@media (min-width:1000px){
  .lx__top{padding:10px 24px}
  .lx__menu{display:none}
  .lx__grid{grid-template-columns:minmax(0,1fr) 360px}
  .lx__main{padding:24px 28px 60px}
  .player{border-radius:var(--r);box-shadow:var(--shadow)}
  .lx__head,.ltabs{padding-left:0;padding-right:0}
  .ltabs__btns{margin:0 0 8px;padding:0}
  .lx__acts{grid-template-columns:auto auto;justify-content:start}
  .lx__main>.alert,.lx__main>.feedback,.lx__main>.pblock,.lx__main>.lnotes,.lx__main>form,.lx__main>.qresult,.lx__main>.btn,.lx__main>p,.lx__pn,.lx__lock{margin-left:0;margin-right:0}
  .lx__side{position:sticky;top:65px;transform:none;max-height:calc(100vh - 65px);border-radius:0;border-left:1px solid var(--line);box-shadow:none;padding:16px 18px 30px;z-index:1}
  .lx__sidehead .icon-btn{display:none}
  .lx__sidehead::before{display:none}
  .lx__scrim{display:none!important}
}