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auto;overflow:hidden;border-radius:14px;background:var(--sunk);cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none}.lic-acrop:active{cursor:grabbing}.lic-acrop img{position:absolute;left:50%;top:50%;min-width:100%;min-height:100%;transform:translate(-50%,-50%) translate(var(--x, 0),var(--y, 0)) scale(var(--z, 1));object-fit:cover;pointer-events:none}.lic-acrop-mask{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:#00000080;-webkit-mask:radial-gradient(circle at 50% 50%,transparent 49.5%,#000 50%);mask:radial-gradient(circle at 50% 50%,transparent 49.5%,#000 50%)}.ref-lic .lic .cvbtn{left:auto;right:12px}.ref-lic .lic .adm{right:auto;left:12px}.ref-lic .lic .ghost{display:flex;flex-direction:column;align-items:center;gap:12px}.ref-lic .lic .ghost b{position:static;transform:none}.ref-lic .lic 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.top-r{display:flex;gap:10px;align-items:center}.ref-lic .rr{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);border-radius:99px;padding:8px 14px;font-size:14px}.ref-lic .rr b{background:var(--accent);color:var(--ground);font:600 11px var(--mono);border-radius:99px;padding:1px 7px}.ref-lic .me{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font:600 14px var(--sans);letter-spacing:.02em;color:#fff;overflow:hidden;position:relative}.ref-lic .me.av{width:38px!important;height:38px!important;font-size:14px!important;border:0!important;border-radius:50%}.ref-lic .me.av img{position:absolute;left:50%;top:50%;width:100%;height:100%;object-fit:cover;transform:translate(-50%,-50%) translate(var(--x,0),var(--y,0)) scale(var(--z,1))}.ref-lic .col{max-width:680px;margin:0 auto;padding-bottom:120px}.ref-lic .back{display:inline-flex;align-items:center;gap:4px;color:var(--t2);font-size:14px;padding-block:18px 10px}.ref-lic .col h1{font-size:34px;letter-spacing:-.02em;margin:0 0 16px;line-height:1.1}.ref-lic .seg{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:5px;border:1px solid var(--line);border-radius:14px;background:var(--panel);margin-bottom:18px}.ref-lic .seg button{padding:10px;border-radius:10px;color:var(--t2);font-size:14.5px;font-weight:500}.ref-lic .seg button[aria-selected=true]{background:var(--raised);color:var(--t1);box-shadow:inset 0 0 0 1px color-mix(in oklab,var(--accent) 55%,transparent)}.ref-lic .box{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:16px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.ref-lic .lab{font:10.5px var(--mono);letter-spacing:.14em;color:var(--t3);text-transform:uppercase;margin:0 0 12px}.ref-lic .boxh{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.ref-lic .boxh .lab{margin:0}.ref-lic 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.ed{border-bottom-color:var(--line)}.ref-lic .editing .ed:hover{border-bottom-color:var(--t3)}.ref-lic .ed:focus{border-bottom:1px solid var(--accent)}.ref-lic .ed::placeholder{color:var(--t3)}.ref-lic .hn{font-size:23px;font-weight:600;letter-spacing:-.01em}.ref-lic .sn{font:13px var(--mono);letter-spacing:.08em;color:var(--t3);text-transform:none}.ref-lic .swap{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;color:var(--t3);border:1px solid var(--line)}.ref-lic .swap:hover{color:var(--accent);border-color:var(--accent)}.ref-lic .bio{margin-top:8px;font-size:14.5px;color:var(--t2);width:100%}.ref-lic .where{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 16px}.ref-lic .where span{font-size:12.5px;padding:4px 10px;border-radius:99px;background:var(--raised);color:var(--t2)}.ref-lic .doc{border:1px solid var(--line);border-radius:14px;padding:16px;display:grid;grid-template-columns:1fr 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.slot.issued{border-style:solid;border-color:var(--hair)}.ref-lic .slot .gen{color:var(--t3);line-height:0}.ref-lic .slot .when{font:10.5px var(--mono);color:var(--t3)}.ref-lic .slot .got{line-height:0}.ref-lic .slot .got.slam svg{animation:slam .7s var(--ease)}.ref-lic .slot .pill{font-size:12.5px;padding:7px 12px}.ref-lic .acts{display:flex;gap:8px;margin-top:16px}.ref-lic .acts .pill{flex:1;justify-content:center;padding:10px 12px;font-size:14px}@keyframes slam{0%{transform:translateY(-30px) scale(1.7);opacity:0}45%{transform:translateY(0) scale(.92);opacity:1}62%{transform:scale(1.04)}to{transform:scale(1)}}@keyframes press{0%{transform:scale(1.6);opacity:0}55%{transform:scale(.9);opacity:1}to{transform:scale(1)}}.ref-lic .cover{height:110px;position:relative;background:linear-gradient(120deg,color-mix(in oklab,var(--accent) 62%,oklch(.18 .03 255)),color-mix(in oklab,var(--accent) 30%,oklch(.14 .02 255)));overflow:hidden}.ref-lic .cvbtn{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:#fff;background:#00000052;border-radius:99px;padding:5px 11px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.ref-lic .livtag{position:absolute;right:10px;bottom:9px;display:inline-flex;align-items:center;gap:6px;font:600 10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#fff;background:#00000052;border-radius:99px;padding:4px 10px 4px 7px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.ref-lic .livtag i{width:9px;height:9px;border-radius:50%;box-shadow:0 0 0 1.5px #fff9}.ref-lic .copt.row{flex-direction:row;justify-content:center;gap:10px;padding:12px}.ref-lic .copt.row .cthumb{width:64px;aspect-ratio:16/9}.ref-lic .catb{font:600 9.5px var(--mono);font-style:normal;letter-spacing:.08em;color:var(--accent);border:1px solid color-mix(in oklab,var(--accent) 50%,transparent);border-radius:99px;padding:0 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#devwrap{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;background:#0000009e;display:flex;flex-direction:column;align-items:center;gap:10px;padding:18px;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.ref-lic #devwrap iframe{flex:1;border:0;border-radius:22px;background:var(--ground);box-shadow:0 30px 80px #00000080;max-width:100%}.ref-lic .devbar{display:flex;align-items:center;gap:14px;color:#fff;font:600 12px var(--mono);letter-spacing:.1em}.ref-lic .devbar button{font:inherit;letter-spacing:.06em;border:1px solid oklch(1 0 0 / .35);border-radius:99px;padding:5px 12px;color:#fff}@media (max-width:560px){.ref-lic .col h1{font-size:28px}.ref-lic .box{padding:16px}.ref-lic .sega{flex-wrap:wrap}.ref-lic .sega button{flex:1 1 auto;text-align:center}.ref-lic .pd{font-size:13.5px}.ref-lic .seg button{font-size:13px;padding:9px 4px}.ref-lic .stats b{font-size:18px}.ref-lic .stats span{font-size:11px}}.ref-lic .av.ph{overflow:hidden;position:relative;background:var(--raised)}.ref-lic .av.ph img{position:absolute;left:50%;top:50%;width:100%;height:100%;object-fit:cover;transform:translate(-50%,-50%) translate(var(--x,0),var(--y,0)) scale(var(--z,1))}.ref-lic .crop{position:relative;width:min(300px,78vw);aspect-ratio:1;margin:0 auto;border-radius:16px;overflow:hidden;background:var(--raised);touch-action:none;cursor:grab}.ref-lic .crop.grab{cursor:grabbing}.ref-lic .crop img{position:absolute;left:50%;top:50%;width:100%;height:100%;object-fit:cover;transform:translate(-50%,-50%) translate(var(--x,0),var(--y,0)) scale(var(--z,1));-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.ref-lic .cmask{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;box-shadow:0 0 0 999px #0000008c inset;border-radius:50%;outline:2px solid oklch(1 0 0 / .55);outline-offset:-2px}.ref-lic .crow2{display:flex;align-items:center;gap:12px;margin:16px auto 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var(--line);display:grid;place-items:center;color:var(--t2);line-height:0}.ref-lic .opt[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.ref-lic .opt.txt{width:auto;padding:0 12px;font-size:13px;line-height:1}.ref-lic .opt.fnt{width:auto;padding:0 12px;line-height:1;font-size:16px;font-weight:700}.ref-lic .sw{width:30px;height:30px;border-radius:50%;border:3px solid var(--ground);box-shadow:0 0 0 1px var(--line)}.ref-lic .sw[aria-pressed=true]{box-shadow:0 0 0 2px var(--t1)}.ref-lic .fields{display:grid;grid-template-columns:110px 1fr;gap:10px}.ref-lic .fields label{display:flex;flex-direction:column;gap:6px;min-width:0}.ref-lic .fields input{font:600 14px var(--mono);letter-spacing:.08em;text-transform:uppercase;background:var(--raised);border:1px solid var(--line);border-radius:10px;padding:8px 11px;color:var(--t1);width:100%;min-width:0}.ref-lic .fields input:disabled{opacity:.4}.ref-lic .confirm{border:1px solid color-mix(in oklab,var(--accent) 45%,transparent);background:var(--accent-soft);border-radius:12px;padding:12px 14px;font-size:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.ref-lic .confirm b{flex:1 1 200px;font-weight:500}.ref-lic .issue{display:flex;gap:10px;flex-wrap:wrap}.ref-lic .row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-top:1px solid var(--hair)}.ref-lic .row:first-of-type{border-top:0;padding-top:4px}.ref-lic .row b{display:block;font-weight:600;font-size:16px}.ref-lic .row span{color:var(--t3);font-size:14px}.ref-lic .del{color:var(--t3);font-size:14px;margin:6px 2px}.ref-lic .del u{color:var(--t2);text-underline-offset:4px}.ref-lic .sega{display:flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:12px;background:var(--raised);margin:12px 0 4px;flex-wrap:wrap}.ref-lic .sega button{padding:8px 14px;border-radius:9px;font-size:14px;color:var(--t2)}.ref-lic .sega button[aria-pressed=true]{background:var(--ground);color:var(--t1);box-shadow:inset 0 0 0 1px var(--line)}.ref-lic .ph{font-size:16px;font-weight:600;margin:0}.ref-lic .pd{color:var(--t2);font-size:14px;margin:4px 0 0}.ref-lic .inp{width:100%;background:var(--raised);border:1px solid var(--line);border-radius:10px;padding:11px 14px;color:var(--t1);font:inherit;font-size:14.5px;margin-top:6px}.ref-lic .tog{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding-top:16px;margin-top:16px;border-top:1px solid var(--hair)}.ref-lic .sw2{width:48px;height:28px;border-radius:99px;background:var(--raised);border:1px solid var(--line);position:relative;flex:none;transition:background .2s}.ref-lic .sw2:after{content:"";position:absolute;left:4px;top:4px;width:18px;height:18px;border-radius:50%;background:var(--t3);transition:transform .25s var(--ease),background .2s}.ref-lic .sw2[aria-checked=true]{background:var(--accent)}.ref-lic .sw2[aria-checked=true]:after{transform:translate(20px);background:var(--ground)}.ref-lic .new{font:600 10px var(--mono);letter-spacing:.1em;color:var(--accent);border:1px solid color-mix(in oklab,var(--accent) 50%,transparent);border-radius:99px;padding:1px 7px;margin-left:8px;vertical-align:2px}.ref-lic .scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#00000080;display:grid;place-items:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .25s var(--ease)}.ref-lic .scrim.open{opacity:1;pointer-events:auto}.ref-lic .sheet{width:min(460px,100%);max-height:calc(100vh - 32px);overflow:auto;border-radius:20px;box-shadow:0 30px 80px #00000080;transform:translateY(14px) scale(.98);transition:transform .35s var(--ease);position:relative}.ref-lic .scrim.open .sheet{transform:none}.ref-lic .sheet .adm{right:52px;top:14px}.ref-lic .x{position:absolute;right:10px;top:10px;z-index:2;width:32px;height:32px;border-radius:50%;background:#00000052;color:#fff;display:grid;place-items:center}.ref-lic .vtag{position:absolute;left:12px;top:12px;z-index:2;font:600 10.5px var(--mono);letter-spacing:.1em;color:#fff;background:#00000052;padding:4px 10px;border-radius:99px}.ref-lic .toast{position:fixed;left:50%;top:18px;transform:translate(-50%,-20px);opacity:0;z-index:60;background:var(--t1);color:var(--ground);padding:9px 16px;border-radius:99px;font-size:13.5px;transition:all .3s var(--ease);pointer-events:none;white-space:nowrap}.ref-lic .toast.show{opacity:1;transform:translate(-50%)}.ref-lic .demo{flex-wrap:wrap;justify-content:center;max-width:calc(100vw - 24px);position:fixed;left:50%;bottom:calc(16px + env(safe-area-inset-bottom,0px));transform:translate(-50%);z-index:40;display:flex;gap:4px;padding:4px;border-radius:99px;background:#10171feb;color:#eee;box-shadow:0 10px 30px #0000004d;font-size:13px}.ref-lic .demo button{padding:7px 14px;border-radius:99px;white-space:nowrap}@media (max-width:600px){.ref-lic .doc,.ref-lic .maker{grid-template-columns:1fr}.ref-lic .stpaper{max-width:240px;width:100%;justify-self:center}.ref-lic .rr .lbl{display:none}.ref-lic .box{padding:18px}.ref-lic .lbody{padding:0 16px 16px}}@media (prefers-reduced-motion:reduce){.ref-lic *{animation:none!important;transition:none!important}}.ff{min-height:100dvh;box-sizing:border-box;display:flex;align-items:center;justify-content:center;padding:40px 22px 64px}.ff-col{width:100%;max-width:440px}@media (prefers-reduced-motion: no-preference){.app:not(.smooth-air) .ff-col{animation:ff-in .42s cubic-bezier(.22,1,.36,1) both}}@keyframes ff-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.ff-eyebrow{margin:0 0 10px;font:500 12px/1 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--t3)}.ff-title{margin:0 0 8px;font:600 clamp(24px,5vw,30px)/1.15 var(--font-ui);letter-spacing:-.01em;color:var(--t1)}.ff-sub{margin:0 0 26px;font-size:15px;line-height:1.55;color:var(--t2);max-width:46ch}.ff-l{display:block;margin:0 0 6px;font-size:14px;font-weight:500;color:var(--t2)}.ff-h{margin:-2px 0 10px;font-size:14px;line-height:1.5;color:var(--t3);max-width:46ch}.ff-in{display:block;width:100%;box-sizing:border-box;margin:0 0 22px;padding:12px 15px;background:var(--raised);border:1px solid var(--line);border-radius:12px;color:var(--t1);font:16px var(--font-ui)}.ff-code{display:block;width:6.5ch;margin:0 0 8px;padding:10px 0;text-align:center;background:var(--raised);border:1px solid var(--line);border-radius:12px;color:var(--t1);font:26px var(--font-mono);letter-spacing:.16em;text-transform:uppercase}.ff-in:focus,.ff-code:focus{outline:2px solid var(--active);outline-offset:1px}.ff-in[aria-invalid=true]{border-color:var(--active)}.ff-note{margin:-14px 0 18px;font-size:14px;line-height:1.45;color:var(--t1)}.ff-code+.ff-note{margin:0 0 12px}.ff-go{display:block;width:100%;min-height:48px;margin-top:22px;border:0;border-radius:999px;cursor:pointer;background:var(--active-fill);color:var(--ground);font:600 16px var(--font-ui);transition:transform .18s cubic-bezier(.22,1,.36,1),filter .18s}.ff-go:hover{filter:brightness(1.06)}.ff-go:active{transform:scale(.98)}.ff-go:disabled{background:var(--raised);color:var(--t3);cursor:default;filter:none;transform:none}.ff-after{margin:12px 0 0;font-size:13px;color:var(--t3);text-align:center}.app[data-paper="1"] .ff-go:not(:disabled){background:transparent;color:var(--active);border:1.5px solid var(--active);border-radius:2px}:root{--house-fill: var(--panel);--house-line: 1px solid var(--edge, var(--hair));--house-radius: 14px;--house-pad: 20px;--house-gap: 14px;--house-shadow: 0 1px 2px oklch(0 0 0 / .05), 0 10px 28px oklch(0 0 0 / .06)}@media (min-width: 768px){:root{--house-pad: 24px;--house-gap: 16px}}.app[data-variant=night]{--house-shadow: 0 1px 0 var(--edge-hi, transparent), 0 12px 30px oklch(0 0 0 / .28)}.app[data-aur="1"]{--house-shadow: 0 1px 0 var(--edge-hi, transparent);--house-fill: var(--panel)}.app[data-paper="1"]{--house-shadow: none;--house-radius: 0px}.house{background:var(--house-fill);border:var(--house-line);border-radius:var(--house-radius);box-shadow:var(--house-shadow);padding:var(--house-pad)}.house-in{background:var(--raised);border:var(--house-line);border-radius:calc(var(--house-radius) - 4px);box-shadow:none;padding:calc(var(--house-pad) - 6px)}.app[data-paper="1"] .house-in{border-radius:0}.house-stack{display:grid;gap:var(--house-gap)}.house[data-press]{cursor:pointer;transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}.house[data-press]:hover{background:var(--raised);border-color:var(--line)}.house[data-press]:focus-visible{outline:2px solid var(--active);outline-offset:2px}.house-wrap{padding-inline:var(--pad)}:root{--player-max-h: 100vh;--player-max-w: 100%;--over-video: oklch(1 0 0);--lbox-r: 13px}.app[data-paper="1"]{--lbox-r: 2px}@media (min-width: 768px){:root{--player-max-h: 52vh;--player-max-w: 100%}}@media (min-width: 1120px){:root{--player-max-h: 64vh;--player-max-w: 1180px}}.player-slot{position:relative;width:min(100%,var(--player-max-w),calc(var(--player-max-h) * 16 / 9));aspect-ratio:16 / 9;background:var(--raised);border-radius:var(--lbox-r);overflow:hidden}.lesson-body{padding-inline:var(--pad);width:min(100%,var(--player-max-w),calc(var(--player-max-h) * 16 / 9 + var(--pad) * 2))}.lessonpage{padding-block:18px calc(64px + var(--mini-h, 0px))}.up{display:inline-flex;align-items:center;gap:8px;min-height:var(--tap);padding-inline:var(--pad);background:none;border:0;font:inherit;font-size:var(--fs-sm);color:var(--t3);text-decoration:none;cursor:pointer}.up:hover{color:var(--t1)}.up svg{width:16px;height:16px;flex:none}[dir=rtl] .up svg{transform:scaleX(-1)}.lesson-head{padding-inline:var(--pad);margin:0 0 2px}.lesson-code{display:block;font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.06em;color:var(--t3);margin-bottom:8px}.lesson-name{display:block;font-size:var(--fs-display);line-height:var(--lh-tight);letter-spacing:-.02em;color:var(--t1);margin:0}.next-up{display:flex;align-items:center;gap:14px;min-height:var(--tap);margin-top:18px;padding-block:12px;border-top:1px solid var(--hair)}.next-label{font-size:var(--fs-xs);letter-spacing:.06em;text-transform:uppercase;color:var(--t3);flex:none}.next-title{font-size:var(--fs-md);color:var(--t1);text-decoration:none;flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.next-title:hover{color:var(--active)}.next-meta{font-size:var(--fs-sm);color:var(--t3);flex:none}.player-layer{position:absolute;top:0;left:0;z-index:40;overflow:hidden;background:#000;transition:transform var(--t-base) var(--ease),width var(--t-base) var(--ease),border-radius var(--t-base) var(--ease);will-change:transform;-webkit-user-select:none;user-select:none}.player-layer video{display:block;width:100%;aspect-ratio:16 / 9;height:auto;object-fit:cover;background:#000}.player-layer[data-dock=none]{display:none}.player-layer[data-dock=inline]{border-radius:var(--lbox-r)}.player-layer[data-fs="1"]{top:0!important;right:0!important;bottom:0!important;left:0!important;width:100%!important;height:100%!important;transform:none!important;border-radius:0}.player-layer[data-fs="1"] video{aspect-ratio:auto;height:100%;object-fit:contain}.pctl{position:absolute;inset:auto 0 0 0;z-index:4;padding:0 10px 8px;background:linear-gradient(180deg,transparent,oklch(0 0 0 / .62));opacity:0;transition:opacity var(--t-fast) var(--ease)}.player-layer:hover .pctl,.player-layer:focus-within .pctl,.player-layer[data-idle="0"] .pctl{opacity:1}.player-layer[data-dock=mini] .pctl{display:none}.pctl-row{display:flex;align-items:center;gap:2px}.pbtn{width:var(--tap);height:var(--tap);display:grid;place-items:center;background:none;border:0;padding:0;color:#f8f8f8;cursor:pointer;flex:none}.pbtn:hover{color:#fff}.pbtn svg{width:20px;height:20px}.pbtn[data-note]:hover,.pbtn[data-note][aria-pressed=true]{color:var(--active)}.ptime{font-family:var(--font-mono);font-size:var(--fs-xs);font-variant-numeric:tabular-nums;color:#e4e4e4;padding-inline:8px;flex:none}.pspacer{flex:1 1 auto}@media (max-width: 560px){.ptime-dur{display:none}}.prate{min-width:var(--tap);height:var(--tap);display:grid;place-items:center;background:none;border:0;padding:0 8px;font:inherit;font-size:var(--fs-xs);font-variant-numeric:tabular-nums;color:#f8f8f8;cursor:pointer;flex:none}.prate:hover{color:var(--active)}.pvol{display:flex;align-items:center;flex:none}.pvol-track{width:0;overflow:hidden;transition:width var(--t-fast) var(--ease)}.pvol:hover .pvol-track,.pvol:focus-within .pvol-track{width:76px}.pvol-range{width:76px;accent-color:var(--active)}@media (max-width: 767px){.pvol{display:none}}.scrub{position:relative;height:4px;background:#ffffff42;cursor:pointer;margin:0 10px 2px}.scrub-fill{position:absolute;inset:0 auto 0 0;background:var(--active)}.scrub-mark{position:absolute;top:50%;width:8px;height:6px;border-radius:1px;border:1.5px solid var(--over-video);background:var(--active);transform:translate(-50%,-50%);pointer-events:none}.scrub-mark[data-kind=ask]{width:7px;height:7px;border-radius:1px;background:var(--ask);transform:translate(-50%,-50%) rotate(45deg)}.scrub-mark[data-kind=seat]{width:7px;height:7px;border-radius:1px;background:var(--copilot);transform:translate(-50%,-50%) rotate(45deg)}.scrub-mark[data-many="1"]{width:12px}.scrub-mark[data-kind=ask][data-many="1"],.scrub-mark[data-kind=seat][data-many="1"]{width:9px;height:9px}.pdens{display:block;pointer-events:none;margin:0 10px 2px}.pdens-f{fill:var(--over-video);opacity:.32}.pend{position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;display:grid;place-content:center;gap:14px;justify-items:center;padding:24px;text-align:center;background:#000000e0}.pend-t{font-size:var(--fs-md);color:var(--over-video);max-width:30ch;margin:0}.pend-acts{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.pend-go{display:inline-flex;align-items:center;gap:8px;min-height:var(--tap);padding:0 18px;background:none;border:1px solid var(--over-video);border-radius:999px;font:inherit;font-size:var(--fs-sm);color:var(--over-video);cursor:pointer}.pend-go 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var(--ease)}.opt:hover,.opt:active{background:var(--raised)}.opt-l{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;border:1px solid var(--edge);font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:500;color:var(--t2);flex:none;transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease)}.opt-t{font-size:var(--fs-md);line-height:var(--lh-body);color:var(--t1)}.opt[aria-pressed=true]{border-color:var(--active)}.opt[aria-pressed=true] .opt-l{background:var(--active);border-color:var(--active);color:var(--on-active, oklch(.14 .01 var(--ah, 250)))}.opt[data-mark]{cursor:default}.opt[data-mark=right]{border-color:var(--ok)}.opt[data-mark=right] .opt-l{background:var(--ok);border-color:var(--ok);color:var(--on-mark)}.opt[data-mark=wrong]{border-color:var(--bad)}.opt[data-mark=wrong] .opt-l{background:var(--bad);border-color:var(--bad);color:var(--on-mark)}.opt-mark{grid-column:2;font-size:var(--fs-xs);color:var(--t3);margin-top:4px}.quiz-foot{position:sticky;bottom:0;background:var(--ground);border-top:1px solid var(--edge);padding:12px var(--pad);display:flex;align-items:center;gap:12px}.q-move{margin-inline-start:auto;display:flex;gap:8px}.q-btn{min-height:var(--tap);padding:0 20px;border-radius:999px;background:none;border:1px solid var(--edge);font:inherit;font-size:var(--fs-md);color:var(--t2);cursor:pointer}.q-btn:hover{background:var(--raised);color:var(--t1)}.q-btn[disabled]{opacity:.4;cursor:default}.q-btn[data-primary]{background:var(--active);border-color:var(--active);color:var(--on-active, oklch(.14 .01 var(--ah, 250)));font-weight:600}.nav{display:flex;flex-wrap:wrap;gap:8px;padding:14px var(--pad);border-top:1px solid var(--edge)}.nav-sq{position:relative;width:var(--tap);height:var(--tap);display:grid;place-items:center;background:none;border:1px solid var(--edge);border-radius:9px;font-family:var(--font-mono);font-size:var(--fs-sm);font-variant-numeric:tabular-nums;color:var(--t3);cursor:pointer;transition:border-color var(--t-fast) var(--ease),background var(--t-fast) var(--ease)}.nav-sq:hover{background:var(--raised)}.nav-sq[data-state=answered]{background:var(--raised);color:var(--t1)}.nav-sq[data-state=current]{border-color:var(--active);color:var(--t1)}.nav-sq[data-flag="1"]:after{content:"";position:absolute;top:5px;inset-inline-end:5px;width:5px;height:5px;border-radius:50%;background:var(--active)}.q-card{width:min(100%,620px);margin:40px auto;padding:28px;background:var(--panel);border:1px solid var(--edge);border-radius:14px}.q-card h2{font-size:var(--fs-xl);color:var(--t1);margin:0 0 10px;font-weight:500}.q-card p{font-size:var(--fs-md);color:var(--t2);margin:0 0 6px}.q-card .meta{font-size:var(--fs-sm);color:var(--t3)}.q-card .resume{font-size:var(--fs-sm);color:var(--active);margin-top:12px}.q-review{display:grid;gap:14px;margin-top:26px}.q-rev{padding:18px;background:var(--panel);border:1px solid var(--edge);border-radius:12px}.q-rev-q{font-size:var(--fs-md);color:var(--t1);margin-bottom:12px}.q-rev-line{font-size:var(--fs-sm);margin-bottom:5px}.q-rev-line[data-kind=chose]{color:var(--bad)}.q-rev-line[data-kind=right]{color:var(--ok)}.q-rev-explain{font-size:var(--fs-sm);color:var(--t2);line-height:var(--lh-body);margin-top:10px;padding-top:10px;border-top:1px solid var(--edge);max-width:var(--measure)}.q-rev-lesson{display:inline-flex;align-items:center;gap:6px;min-height:var(--tap);font-size:var(--fs-sm);color:var(--active);text-decoration:none}.opt:focus-visible,.nav-sq:focus-visible,.q-btn:focus-visible,.q-flag:focus-visible{outline:2px solid var(--active);outline-offset:2px}.q-retake{margin:0 0 10px;font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.08em;color:var(--t2)}.q-seg{display:flex;gap:3px;margin:10px 0 4px}.q-seg-i{height:3px;flex:1 1 0;border-radius:2px;background:var(--edge, var(--hair))}.q-seg-i[data-state=done]{background:var(--active)}.q-seg-i[data-state=now]{background:var(--active);opacity:.55}.opt:disabled{cursor:default}.qresults .qr-body{max-width:640px;margin:0 auto;padding:34px var(--card-pad, 22px) 8px;text-align:center}.qr-score{margin:0;font-size:clamp(38px,8vw,56px);font-weight:700;line-height:1.05;letter-spacing:-.02em;color:var(--t1);font-variant-numeric:tabular-nums}.qr-verdict{margin:4px 0 0;font-size:15px;color:var(--t2)}.qr-dial{display:flex;justify-content:center;margin:26px 0 10px}.qr-move{margin:0;font-size:14.5px;color:var(--t2)}.qr-move b{color:var(--t1);font-weight:600;font-variant-numeric:tabular-nums}.qr-note{margin:14px auto 0;max-width:44ch;font-size:13px;color:var(--t3);line-height:1.45}.qr-acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:26px var(--card-pad, 22px) 34px}@media (max-width: 560px){.qresults .qr-body{padding-top:26px}.qr-dial{margin:20px 0 8px}.qr-acts{padding-bottom:28px}.qr-acts .q-btn{flex:1 1 auto}}.exam .quiz-count{margin-inline-start:0}.quiz-head>.quiz-leave:last-child{margin-inline-start:auto}.quiz-head .exam-clock+.quiz-leave{margin-inline-start:0}.quiz.exam{min-height:0}.exam .quiz-body{padding-block:22px 26px}.exam-foot .nav{flex:1 1 260px;padding:0;border-top:0;justify-content:center;gap:6px}@media (max-width: 720px){.exam-foot .nav{order:-1;flex-basis:100%;justify-content:flex-start}.exam-foot .q-flag{font-size:var(--fs-sm)}}.nav-inline{padding:0;border-top:0;margin:4px 0 18px}.nav-sq[data-mark=right]{background:var(--ok);border-color:var(--ok);color:var(--on-mark)}.nav-sq[data-mark=wrong]{background:none;border-color:var(--bad);border-style:dashed;color:var(--t1)}.q-rev-yours{color:var(--t3)}.q-rev-right{color:var(--t1);font-weight:500}.q-rev-q b{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--t3);font-weight:400;margin-inline-end:6px}.quiz.exam{min-height:min(100dvh - 96px,940px);--paper-ease: cubic-bezier(.32, .72, 0, 1);--glass: oklch(from var(--panel) l c h / .82);--hair: oklch(from var(--t1) l c h / .09);--lift: oklch(from var(--t1) l c h / .06);--d2: 0 24px 70px oklch(0 0 0 / .5), 0 3px 10px oklch(0 0 0 / .34);position:relative;grid-template-rows:auto 1fr auto;padding-bottom:0}.app[data-variant=day] .quiz.exam{--d2: 0 18px 50px oklch(.25 .02 255 / .2), 0 2px 8px oklch(.25 .02 255 / .12);--hair: oklch(from var(--t1) l c h / .13);--lift: oklch(1 0 0 / .9)}.exam .quiz-head,.exam .quiz-foot{background:linear-gradient(var(--glass),var(--glass)),var(--ground);backdrop-filter:blur(30px) saturate(1.7);-webkit-backdrop-filter:blur(30px) saturate(1.7);border:1px solid var(--hair);box-shadow:var(--d2),inset 0 1px 0 var(--lift);border-radius:18px}@media (pointer: coarse){.exam .quiz-head,.exam .quiz-foot{backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5)}}.exam .quiz-head{margin:14px auto 0;padding:9px 14px;width:min(100% - 28px,860px)}.exam .quiz-foot{position:sticky;bottom:calc(14px + env(safe-area-inset-bottom,0px));margin:0 auto 14px;padding:7px 10px;width:min(100% - 28px,860px)}.exam .quiz-body:not(:has(.q-card)){align-self:start}.exam .quiz-body{width:min(100% - 28px,860px);padding-block:26px 20px;align-self:center}.exam .q-card{width:100%;margin:0;padding:26px 26px 24px;background:var(--panel);border:1px solid var(--edge);border-radius:16px}.exam .q-text{font-size:var(--fs-lg);line-height:1.4;margin-bottom:18px}.exam .quiz-head{gap:10px}.q-weak{display:grid;gap:4px;margin:4px 0 22px}.q-weak-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;min-height:44px;padding:10px 12px;text-align:left;background:var(--panel);border:1px solid var(--edge);border-radius:10px;font:inherit;color:var(--t2);cursor:pointer}.q-weak-row:hover{border-color:var(--edge-hi);color:var(--t1)}.q-weak-row b{font-size:var(--fs-md);font-weight:500;color:var(--t1)}.q-weak-row em{font-style:normal;font-size:var(--fs-sm);color:var(--t3);margin-inline-start:auto}.q-rev[data-mark=right]{border-inline-start-color:var(--ok)}.q-rev[data-mark=wrong]{border-inline-start-color:var(--bad)}.q-got{margin-top:22px}.q-got>summary{min-height:44px;display:flex;align-items:center;font-size:var(--fs-md);color:var(--t2);cursor:pointer;list-style:none}.q-got>summary::-webkit-details-marker{display:none}.q-got>summary:before{content:"›";margin-inline-end:9px;color:var(--t3);transition:transform .2s var(--paper-ease);display:inline-block}.q-got[open]>summary:before{transform:rotate(90deg)}.q-got>summary:hover{color:var(--t1)}.q-got .q-review{margin-top:10px}#pw-sheet-end{--pw-sheet: end}