:root{color-scheme:light;--paper:#faf9f6;--thumbnail:#f1efe9;--ink:#2b332e;--secondary:#6e756b;--line:#e0e0d4;--glass:rgba(255,255,255,.72);--shadow:0 6px 30px #343a2d0c,0 1px 4px #343a2d04;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit;color:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:none}a{color:inherit;text-decoration:none}button:disabled{opacity:.27;cursor:default}button svg,a svg{display:block;width:24px;height:24px;flex:none}button:active:not(:disabled),.circle:active{transform:scale(.94)}button{transition:background .15s,transform .15s,opacity .15s}h1,h2,h3,p{margin:0}[hidden]{display:none!important}img{display:block;max-width:100%}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--ink);outline-offset:4px}.glass{background:var(--glass);border:1px solid #ffffffc9;box-shadow:var(--shadow);backdrop-filter:blur(24px) saturate(130%);-webkit-backdrop-filter:blur(24px) saturate(130%)}.topbar{display:grid;grid-template-columns:94px minmax(0,1fr) 94px;align-items:center;gap:8px;padding:14px 20px;width:100%;margin:0 auto;z-index:10}.topbar h1{font-size:17px;line-height:1.25;font-weight:650;text-align:center;letter-spacing:-.35px}.circle{display:grid;place-items:center;border-radius:50%;width:44px;height:44px;flex:none}.group{display:flex;border-radius:28px;justify-self:end;padding:0 3px;gap:0}.group .circle{width:42px;box-shadow:none}.active{background:var(--ink)!important;color:var(--paper)!important}.active[data-icon=bookmark] svg{fill:currentColor}.view-menu{position:relative}.menu{position:absolute;top:54px;right:0;width:244px;border-radius:22px;background:#faf9f6ee;padding:12px;z-index:30;box-shadow:0 14px 40px #2b332e22;border:1px solid #fff;backdrop-filter:blur(28px)}.menu label{font-size:12px;color:var(--secondary);display:block;margin:14px 7px 8px}.layout-toggle{display:flex;gap:5px;background:#eae9e280;padding:4px;border-radius:13px}.layout-toggle button{border-radius:10px;display:flex;align-items:center;justify-content:center;gap:7px;flex:1;padding:9px 4px;font-size:13px}.layout-toggle svg{width:18px;height:18px}.selected{background:#fff;box-shadow:0 1px 5px #0000000b}.menu select{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:10px;font-size:14px}.library{max-width:960px;margin:auto}.library-header{position:sticky;top:0;z-index:20;background:linear-gradient(var(--paper) 65%,#faf9f6f2);backdrop-filter:blur(18px)}.library-header .topbar{max-width:1000px;padding-top:max(16px,env(safe-area-inset-top))}.search-bar{padding:0 20px 14px;display:flex;gap:12px}.search-bar input{background:var(--thumbnail);border:1px solid transparent;width:100%;border-radius:16px;padding:13px 16px;min-width:0;font-size:16px;outline-offset:0}.search-bar button{font-size:14px}.collection{padding:4px 20px 48px}.knot-row{display:flex;gap:20px;align-items:center;padding:12px 0;border-bottom:1px solid #e0e0d470;min-height:130px}.knot-row:hover .thumb{background:#eae7de}.thumb{width:106px;height:106px;background:var(--thumbnail);border-radius:20px;overflow:hidden;flex:none;transition:background .2s}.thumb img{width:100%;height:100%;object-fit:contain}.row-copy{min-width:0;flex:1}.row-copy h2{font-size:18px;letter-spacing:-.4px;font-weight:600;line-height:1.3}.row-copy p{font-size:13px;line-height:1.4;color:var(--secondary);margin-top:7px}.row-end{display:flex;align-items:center;gap:8px}.row-end svg{width:16px;height:16px;color:#9aa094}.saved-mark svg{width:14px;height:14px;fill:var(--ink);color:var(--ink)}.collection[data-layout=grid]{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding-top:10px}.collection[data-layout=grid] .knot-row{display:block;padding:0;min-height:0;border:0}.collection[data-layout=grid] .thumb{width:100%;height:auto;aspect-ratio:1;border-radius:18px}.collection[data-layout=grid] .row-copy,.collection[data-layout=grid] .row-end{display:none}.empty{padding:100px 24px;text-align:center}.empty h2{font-size:23px;margin:12px 0}.empty p{color:var(--secondary);line-height:1.6}.text-button{padding:12px 18px;border-radius:30px;background:var(--ink);color:var(--paper);margin-top:22px}.library-footer{border-top:1px solid #e0e0d460;margin:0 20px;padding:28px 0 36px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:12px;color:var(--secondary)}.library-footer p{max-width:460px;line-height:1.6}.library-footer a{white-space:nowrap}.lesson{height:100svh;height:100dvh;position:relative;overflow:hidden}.lesson .topbar{position:absolute;top:env(safe-area-inset-top);left:0;right:0;max-width:none;z-index:3}.lesson .topbar h1{font-size:16px;max-width:430px;justify-self:center;text-wrap:balance}.viewport{position:absolute;inset:0;touch-action:none;cursor:grab}.viewport:active{cursor:grabbing}.viewport canvas{width:100%;height:100%;display:block;outline:none}.fallback-image{position:absolute;left:50%;top:42%;transform:translate(-50%,-50%);width:min(72vw,460px);mix-blend-mode:multiply}.loading{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);background:var(--paper);padding:12px 18px;border-radius:20px;color:var(--secondary);font-size:14px;z-index:1}.loading:before{content:"";width:12px;height:12px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--ink);display:inline-block;margin-right:9px;vertical-align:-2px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error{max-width:320px;text-align:center;padding:24px;line-height:1.6;box-shadow:var(--shadow)}.error:before{display:none}.error button{display:block;margin:14px auto 0;font-weight:600;text-decoration:underline}.overlay{position:absolute;bottom:max(16px,env(safe-area-inset-bottom));left:20px;right:20px;display:flex;flex-direction:column;gap:12px;align-items:center;z-index:2;pointer-events:none}.caption,.transport{width:100%;max-width:430px;pointer-events:auto}.caption{border-radius:24px;padding:15px 17px;line-height:1.4}.caption-heading{display:flex;gap:12px;align-items:baseline;justify-content:space-between;margin-bottom:5px}.caption h2{font-size:15px;font-weight:600;line-height:1.35}.caption small{font-size:12px;color:var(--secondary);font-variant-numeric:tabular-nums;white-space:nowrap}.caption p{font-size:14px;color:var(--secondary);line-height:1.45}.caption.overview p{font-size:15px;color:var(--ink)}.transport{display:flex;flex-direction:column;gap:8px}.timeline{position:relative;height:30px;display:flex;align-items:center}.timeline input{position:relative;z-index:2;-webkit-appearance:none;appearance:none;width:100%;height:28px;background:transparent;margin:0;cursor:pointer;touch-action:none}.timeline input::-webkit-slider-runnable-track{height:5px;border-radius:6px;background:linear-gradient(to right,var(--ink) var(--fill,0%),#2b332e22 var(--fill,0%))}.timeline input::-moz-range-track{height:5px;border-radius:6px;background:#2b332e22}.timeline input::-moz-range-progress{height:5px;border-radius:6px;background:var(--ink)}.timeline input::-webkit-slider-thumb{-webkit-appearance:none;width:27px;height:27px;border-radius:50%;background:#fff;box-shadow:0 2px 9px #2b332e25;border:1px solid #f5f5ef;margin-top:-11px}.timeline input::-moz-range-thumb{width:25px;height:25px;border-radius:50%;background:#fff;box-shadow:0 2px 9px #2b332e25;border:1px solid #f5f5ef}.ticks{position:absolute;bottom:0;left:13px;right:13px;height:3px;pointer-events:none}.ticks span{position:absolute;width:3px;height:3px;border-radius:50%;background:#2b332e28;transform:translate(-50%)}.transport-buttons{display:flex;justify-content:space-between;align-items:center;gap:12px}.transport-buttons>.circle,.speed-control{width:52px;height:52px}.transport-buttons .play{width:62px;height:62px;background:var(--ink);color:var(--paper);border:1px solid var(--ink);box-shadow:0 5px 20px #2b332e12}.play svg{width:27px;height:27px}.speed-control{position:relative;z-index:3}.speed-control button{width:52px;height:52px;font-size:13px;font-weight:600;white-space:nowrap}.speed-menu{position:absolute;bottom:66px;right:0;padding:6px;min-width:110px;border-radius:20px;background:#faf9f6f2;box-shadow:0 10px 32px #2b332e25;backdrop-filter:blur(20px)}.speed-menu button{width:100%;height:40px;border-radius:12px;display:block;font-size:14px}.lesson-guide{max-width:680px;margin:0 auto;padding:30px 24px 60px;line-height:1.6}.lesson-guide h2{font-family:Georgia,serif;font-size:32px;line-height:1.15;font-weight:500;letter-spacing:-.7px;margin:8px 0 18px}.lesson-guide h3{font-size:10px;letter-spacing:1.4px;margin:28px 0 10px}.lesson-guide p,.lesson-guide ul{font-size:16px;color:var(--secondary)}.lesson-guide ul{padding-left:20px}.lesson-guide details{margin-top:28px;border-top:1px solid var(--line);padding-top:20px}.lesson-guide summary{cursor:pointer;font-weight:600;font-size:15px}.lesson-guide ol{padding-left:24px;margin:20px 0}.lesson-guide li{padding:0 0 18px 7px;font-size:15px}.lesson-guide li strong{display:block;font-weight:600}.lesson-guide li p{font-size:14px;margin-top:4px}.lesson-guide .related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.related a{padding:8px 13px;border-radius:16px;background:var(--thumbnail);font-size:13px}.info-dialog{border:1px solid #fff;border-radius:30px;background:var(--paper);color:var(--ink);width:min(600px,calc(100% - 32px));max-height:calc(100dvh - 40px);padding:0;box-shadow:0 25px 100px #17221c2a;overflow:auto}.info-dialog::backdrop{background:#26372d33;backdrop-filter:blur(8px)}.dialog-bar{position:sticky;top:0;display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:#faf9f6ed;backdrop-filter:blur(20px);z-index:1}.dialog-bar p,.dialog-bar button{font-size:14px;font-weight:600}.info-dialog .lesson-guide{padding-top:4px;padding-bottom:30px}.no-script{padding:20px;text-align:center;color:var(--secondary);font-size:14px}.not-found{max-width:600px;margin:15vh auto;padding:24px;text-align:center;line-height:1.7}.not-found h1{font-size:32px;margin:16px}.not-found a{display:inline-block}@media(min-width:700px){.library{max-width:960px}.library .topbar{padding:24px 28px}.topbar h1{font-size:20px}.collection{padding-left:28px;padding-right:28px;display:grid;grid-template-columns:1fr 1fr;column-gap:32px}.knot-row{gap:16px}.thumb{width:108px;height:108px}.collection[data-layout=grid]{grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.search-bar{padding-left:28px;padding-right:28px}.library-footer{margin-left:28px;margin-right:28px}.lesson .topbar{padding:22px 28px}.lesson .topbar h1{font-size:18px}.overlay{left:28px;right:28px;bottom:max(24px,env(safe-area-inset-bottom))}}@media(min-width:900px)and (min-aspect-ratio:1/1){.overlay{flex-direction:row;justify-content:space-between;align-items:flex-end;gap:32px}.caption,.transport{max-width:380px}}@media(max-height:530px)and (min-aspect-ratio:1/1){.lesson .topbar{padding:10px 20px}.lesson .topbar .circle{width:38px;height:38px}.topbar{grid-template-columns:86px minmax(0,1fr) 86px}.overlay{flex-direction:row;align-items:flex-end;gap:20px;bottom:max(10px,env(safe-area-inset-bottom))}.caption{max-width:45%;padding:11px 14px;border-radius:20px}.caption h2{font-size:13px}.caption p{font-size:12px}.transport{max-width:43%;gap:3px}.transport-buttons>.circle,.speed-control,.speed-control button{width:42px;height:42px}.transport-buttons .play{width:50px;height:50px}.transport-buttons{gap:6px}}@media(max-width:360px){.topbar{padding-left:14px;padding-right:14px;grid-template-columns:86px minmax(0,1fr) 86px;gap:4px}.topbar h1{font-size:15px}.overlay{left:14px;right:14px}.collection{padding-left:14px;padding-right:14px}.knot-row{gap:14px}.thumb{width:94px;height:94px}.row-copy h2{font-size:17px}}