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h2.s-head{font-family:var(--head);font-weight:700;letter-spacing:-.03em;line-height:1.06;font-size:clamp(28px,4.4vw,48px);margin:0 0 20px;max-width:20ch;color:var(--ink)}.islide ul{list-style:none;margin:14px 0 0;padding:0;max-width:60ch}.islide ul li{position:relative;padding-left:38px;margin:0 0 18px;font-size:clamp(17px,2vw,22px);line-height:1.42;max-width:none}.islide ul li:before{content:"";position:absolute;left:0;top:.62em;width:15px;height:15px;border-radius:5px;background:var(--grad);transform:translateY(-50%)}.islide ul li b{font-weight:650}.islide p{font-size:clamp(17px,2vw,21px);line-height:1.5;max-width:58ch;color:var(--ink)}.islide p i{color:currentColor;opacity:.72}.islide .example,.islide .exercise,.islide .callout{font-size:clamp(15px,1.7vw,18px);max-width:66ch;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 20px;box-shadow:var(--ring-shadow)}.islide .example p,.islide .exercise p{font-size:inherit}.islide .exercise{background:var(--grad-soft);border-color:var(--glass-brd)}.islide .exercise summary{color:var(--indigo);font-weight:650;cursor:pointer}.islide .islide-in:before{content:attr(data-num);position:absolute;right:clamp(-6px,1.5vw,20px);top:clamp(-6px,-1vw,0px);font-family:var(--head);font-weight:700;font-size:clamp(90px,13vw,170px);line-height:1;color:var(--indigo);opacity:.09;pointer-events:none;z-index:0;letter-spacing:-.05em}.islide .islide-in>*{position:relative;z-index:1}.islide:not([data-kind]) .kicker,.islide[data-kind=""] .kicker{color:var(--indigo)}.islide[data-kind]{color:#fff}.islide[data-kind]:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.islide[data-kind] .islide-in:before{color:#fff;opacity:.1}.islide[data-kind] .kicker{color:#fffc}.islide[data-kind] .kicker:before{background:#fff}.islide[data-kind] h2.s-head{color:#fff}.islide[data-kind] p{color:#ffffffeb}.islide[data-kind] ul li:before{background:#fff}.islide[data-kind] .example,.islide[data-kind] .exercise,.islide[data-kind] .callout{background:#0a0e1c47;border-color:#ffffff38;color:#fff;box-shadow:none}.islide[data-kind] .exercise summary{color:#fff}.islide[data-kind=ex]{background:linear-gradient(145deg,#6b4a0c,#8a5f10 55%,#a8740f)}.islide[data-kind=ex]:after{background:radial-gradient(520px 320px at 105% -10%,rgba(246,185,79,.45),transparent 60%)}.islide[data-kind=mis]{background:linear-gradient(145deg,#5c1620,#7a1c29 55%,#99222f)}.islide[data-kind=mis]:after{background:radial-gradient(520px 320px at 105% -10%,rgba(251,113,133,.42),transparent 60%)}.islide[data-kind=pr],.islide[data-kind=case]{background:linear-gradient(145deg,#3d4a1e,#52611f 55%,#6b7a22)}.islide[data-kind=pr]:after,.islide[data-kind=case]:after{background:radial-gradient(520px 320px at 105% -10%,rgba(168,201,79,.38),transparent 60%)}.islide.cover{background:linear-gradient(140deg,#2a2017,#3d2c1c 60%,#6b3f1e);color:#fff;justify-content:center}.islide.cover:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(560px 340px at 108% -10%,rgba(224,152,31,.42),transparent 58%),radial-gradient(460px 300px at -10% 120%,rgba(242,130,79,.3),transparent 58%);pointer-events:none}.islide.cover .islide-in{position:relative}.islide.cover .islide-in:before{content:none}.islide.cover .kicker{color:#ffffffc7}.islide.cover h2.s-head{color:#fff;font-size:clamp(32px,5.5vw,58px);max-width:16ch}.islide.cover p{color:#ffffffe6}.islide.cover .cover-steps{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.islide.cover .cover-steps span{background:#ffffff1f;border:1px solid rgba(255,255,255,.22);color:#fff;padding:8px 16px;border-radius:999px;font-weight:600;font-size:clamp(13px,1.6vw,16px)}.ideck-foot{display:flex;align-items:center;gap:14px;padding:16px 22px;border-top:1px solid var(--line);background:var(--glass)}.ideck-dots{flex:1 1 auto;display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.ideck-dots b{width:10px;height:10px;border-radius:50%;background:var(--line);border:0;padding:0;cursor:pointer;transition:transform .2s,background .2s}.ideck-dots b.on{background:var(--indigo);transform:scale(1.3)}.ideck-dots b.seen{background:var(--muted)}.ideck-count{color:var(--muted);font-size:14px;min-width:54px;text-align:center;font-variant-numeric:tabular-nums}@media (max-width:600px){.ideck-dots{display:none}.ideck-foot{justify-content:space-between}}.sheet{background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--r-lg);padding:28px 26px 30px;max-width:800px;box-shadow:var(--lift)}@media (min-width:640px){.sheet{padding:36px 40px 38px}}.ticks{display:flex;gap:6px;margin:0 0 22px}.ticks i{flex:1;height:7px;border-radius:99px;background:var(--line);transition:background .3s}.ticks i.cur{background:var(--coral)}.ticks i.ok{background:var(--ok)}.ticks i.bad{background:var(--bad)}.qn{margin:0;color:var(--muted);font-size:15px;font-variant-numeric:tabular-nums}.q{font-family:var(--head);font-size:clamp(22px,3vw,30px);line-height:1.22;letter-spacing:-.02em;margin:8px 0 22px;font-weight:650;padding:0}fieldset{border:0;padding:0;margin:0;min-width:0}.opt{display:block;position:relative;margin:0 0 12px}.opt input{position:absolute;opacity:0;top:0;right:0;bottom:0;left:0;width:100%;height:100%;margin:0;cursor:pointer}.opt .face{display:flex;gap:14px;align-items:center;padding:16px 18px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--surface);transition:border-color .2s,background .2s,transform .15s}.opt:hover .face{border-color:var(--indigo);transform:translate(2px)}.bubble{flex:0 0 auto;width:36px;height:36px;border-radius:50%;border:2px solid var(--muted);display:grid;place-items:center;font-size:14px;font-weight:700;color:var(--muted);background:var(--surface);transition:all .2s}.opt input:checked+.face{border-color:var(--indigo);background:var(--grad-soft)}.opt input:checked+.face .bubble{background:var(--grad);border-color:transparent;color:#fff}.opt input:focus-visible+.face{outline:3px solid var(--coral);outline-offset:2px}.opt.locked input{cursor:default}.opt.locked:hover .face{transform:none}.opt.right .face{background:var(--ok-bg);border-color:var(--ok)}.opt.right .bubble{background:var(--ok);border-color:var(--ok);color:#fff}.opt.wrong .face{background:var(--bad-bg);border-color:var(--bad)}.opt.wrong .bubble{background:var(--bad);border-color:var(--bad);color:#fff}.fb{margin:20px 0 0;padding:16px 20px;border-radius:var(--r-sm)}.fb.ok{background:var(--ok-bg);border:1px solid var(--ok)}.fb.bad{background:var(--bad-bg);border:1px solid var(--bad)}.fb b{display:block;font-family:var(--head);font-size:18px;margin-bottom:3px}.result{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:center;max-width:800px;padding:34px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--glass-brd);box-shadow:var(--lift)}@media (min-width:640px){.result{grid-template-columns:auto minmax(0,1fr);gap:36px}}.sring{position:relative;width:158px;height:158px}.sring svg{width:100%;height:100%;transform:rotate(-90deg)}.sring .track{fill:none;stroke:var(--line);stroke-width:9}.sring .bar2{fill:none;stroke-width:9;stroke-linecap:round;stroke-dasharray:276.46}.sring.pass .bar2{stroke:var(--ok)}.sring.fail .bar2{stroke:var(--bad)}.sring .in{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-content:center;text-align:center;line-height:1}.sring .in b{font-family:var(--head);font-size:38px;font-weight:700;font-variant-numeric:tabular-nums}.sring .in span{font-size:13px;color:var(--muted);margin-top:4px}@media (prefers-reduced-motion:no-preference){.sring .bar2{transition:stroke-dashoffset 1s cubic-bezier(.2,.7,.2,1)}}.result h1{font-size:clamp(26px,3.6vw,38px)}.miss{border:1px solid var(--line);background:var(--surface);border-radius:var(--r-sm);padding:16px 20px;margin:12px 0;max-width:800px}.miss p{margin:6px 0;max-width:none}.pill{display:inline-block;padding:3px 11px;border-radius:99px;font-size:14px;font-weight:600;background:var(--surface-2);color:var(--muted);margin:2px 4px 2px 0;white-space:nowrap;font-variant-numeric:tabular-nums}.pill.ok{background:var(--ok-bg);color:var(--ok)}.pill.bad{background:var(--bad-bg);color:var(--bad)}footer.foot{max-width:1200px;margin:0 auto;padding:0 22px 40px;color:var(--faint);font-size:14px}footer.foot p{max-width:80ch;margin:0 0 6px}@media print{.bar,nav.mods,.seg,.steps,.row,footer.foot,.lesson-head,.ideck-foot,.ideck-top{display:none}body{background:#fff;color:#000}.islide{position:static;opacity:1;visibility:visible;transform:none;page-break-after:always}}.present-cta{display:inline-flex;align-items:center;gap:8px}.deck{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}.deck[hidden]{display:none!important}.deck-bar{flex:0 0 auto;display:flex;align-items:center;gap:14px;padding:16px 24px;border-bottom:1px solid var(--line);background:var(--glass)}.deck-bar .d-title{font-family:var(--head);font-weight:700;font-size:16px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.deck-bar .d-stage{color:var(--muted);font-size:14px;white-space:nowrap}.deck-bar .spacer{flex:1 1 auto}.deck-prog{flex:1 1 auto;height:6px;border-radius:99px;background:var(--surface-2);overflow:hidden;max-width:360px}.deck-prog i{display:block;height:100%;width:0;background:var(--grad);border-radius:99px}@media (prefers-reduced-motion:no-preference){.deck-prog i{transition:width .4s cubic-bezier(.2,.7,.2,1)}}.deck-x{flex:0 0 auto;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);display:grid;place-items:center;font-size:22px;line-height:1}.deck-x:hover{border-color:var(--indigo)}.deck-stage{flex:1 1 auto;position:relative;overflow:hidden}.slide{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;justify-content:flex-start;padding:clamp(28px,6vw,80px);overflow-y:auto;opacity:0;transform:translateY(16px);pointer-events:none;visibility:hidden;background:var(--surface-2)}.slide.cover{justify-content:center}.slide.on{opacity:1;transform:none;pointer-events:auto;visibility:visible}@media (prefers-reduced-motion:no-preference){.slide{transition:opacity .5s ease,transform .5s cubic-bezier(.2,.7,.2,1)}}.slide-in{position:relative;width:100%;max-width:1000px;margin:0 auto}.slide .kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--head);font-weight:650;font-size:clamp(13px,1.6vw,16px);letter-spacing:.14em;text-transform:uppercase;color:var(--indigo);margin:0 0 18px}.slide .kicker:before{content:"";width:10px;height:10px;border-radius:3px;background:var(--grad)}.slide h2.s-head{font-family:var(--head);font-weight:700;letter-spacing:-.03em;line-height:1.05;font-size:clamp(32px,6vw,68px);margin:0 0 24px;max-width:19ch;color:var(--ink)}.slide ul{list-style:none;margin:16px 0 0;padding:0;max-width:62ch}.slide ul li{position:relative;padding-left:42px;margin:0 0 22px;font-size:clamp(19px,2.6vw,28px);line-height:1.4;max-width:none}.slide ul li:before{content:"";position:absolute;left:0;top:.55em;width:17px;height:17px;border-radius:6px;background:var(--grad);transform:translateY(-50%)}.slide ul li b{font-weight:650}.slide p{font-size:clamp(19px,2.6vw,27px);line-height:1.5;max-width:60ch;color:var(--ink)}.slide p i{color:currentColor;opacity:.72}.slide .example,.slide .exercise,.slide .callout{font-size:clamp(16px,2vw,21px);max-width:68ch;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px 24px;box-shadow:var(--ring-shadow)}.slide .example p,.slide .exercise p{font-size:inherit}.slide .exercise{background:var(--grad-soft);border-color:var(--glass-brd)}.slide .exercise summary{color:var(--indigo);font-weight:650;cursor:pointer}.slide .slide-in:before{content:attr(data-num);position:absolute;right:clamp(-10px,2.4vw,30px);top:clamp(-10px,-1.5vw,0px);font-family:var(--head);font-weight:700;font-size:clamp(130px,17vw,240px);line-height:1;color:var(--indigo);opacity:.09;pointer-events:none;z-index:0;letter-spacing:-.05em}.slide .slide-in>*{position:relative;z-index:1}.slide[data-kind]{color:#fff}.slide[data-kind]:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.slide[data-kind] .slide-in:before{color:#fff;opacity:.1}.slide[data-kind] .kicker{color:#fffc}.slide[data-kind] .kicker:before{background:#fff}.slide[data-kind] h2.s-head{color:#fff}.slide[data-kind] p{color:#ffffffeb}.slide[data-kind] ul li:before{background:#fff}.slide[data-kind] .example,.slide[data-kind] .exercise,.slide[data-kind] .callout{background:#0a0e1c47;border-color:#ffffff38;color:#fff;box-shadow:none}.slide[data-kind] .exercise summary{color:#fff}.slide[data-kind=ex]{background:linear-gradient(145deg,#6b4a0c,#8a5f10 55%,#a8740f)}.slide[data-kind=ex]:after{background:radial-gradient(640px 380px at 108% -10%,rgba(246,185,79,.45),transparent 60%)}.slide[data-kind=mis]{background:linear-gradient(145deg,#5c1620,#7a1c29 55%,#99222f)}.slide[data-kind=mis]:after{background:radial-gradient(640px 380px at 108% -10%,rgba(251,113,133,.42),transparent 60%)}.slide[data-kind=pr],.slide[data-kind=case]{background:linear-gradient(145deg,#3d4a1e,#52611f 55%,#6b7a22)}.slide[data-kind=pr]:after,.slide[data-kind=case]:after{background:radial-gradient(640px 380px at 108% -10%,rgba(168,201,79,.38),transparent 60%)}.slide.cover{background:linear-gradient(140deg,#2a2017,#3d2c1c 60%,#6b3f1e);color:#fff}.slide.cover:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(640px 380px at 108% -10%,rgba(224,152,31,.42),transparent 58%),radial-gradient(520px 340px at -10% 120%,rgba(242,130,79,.3),transparent 58%);pointer-events:none}.slide.cover .slide-in{position:relative;z-index:1}.slide.cover .slide-in:before{content:none}.slide.cover .kicker{color:#ffffffc7}.slide.cover h2.s-head{color:#fff;font-size:clamp(36px,7vw,76px);max-width:16ch}.slide.cover p{color:#ffffffeb}.slide.cover .cover-steps{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}.slide.cover .cover-steps span{background:#ffffff1f;border:1px solid rgba(255,255,255,.22);color:#fff;padding:8px 16px;border-radius:999px;font-weight:600;font-size:clamp(14px,1.8vw,17px)}.deck-foot{flex:0 0 auto;display:flex;align-items:center;gap:14px;padding:18px 24px;border-top:1px solid var(--line);background:var(--glass)}.deck-dots{flex:1 1 auto;display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.deck-dots b{width:10px;height:10px;border-radius:50%;background:var(--line);border:0;padding:0;cursor:pointer}.deck-dots b.on{background:var(--indigo);transform:scale(1.3)}.deck-dots b.seen{background:var(--muted)}.deck-count{color:var(--muted);font-size:14px;min-width:54px;text-align:center;font-variant-numeric:tabular-nums}@media (max-width:560px){.deck-bar .d-stage,.deck-dots{display:none}.deck-foot{justify-content:space-between}}.btn.big{padding:15px 28px;font-size:17px}.hero-next{color:#ffffffd1;margin:16px 0 0;font-size:15.5px}.hero-next b{color:#fff}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}.stat{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--ring-shadow)}.stat-ic{flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center}.stat-ic.coral{background:var(--coral-soft);color:var(--coral)}.stat-ic.teal{background:color-mix(in srgb,var(--teal) 18%,var(--surface-2));color:var(--teal)}.stat-ic.ok{background:var(--ok-bg);color:var(--ok)}.stat b{display:block;font-family:var(--head);font-size:26px;font-weight:700;line-height:1}.stat b i{font-style:normal;font-size:15px;color:var(--faint);font-weight:600}.stat span{display:block;color:var(--muted);font-size:13.5px;margin-top:5px}@media (max-width:520px){.stats{grid-template-columns:1fr;gap:10px}.stat{padding:13px 16px}}.mcard{position:relative;display:flex;align-items:flex-start;gap:16px;padding:22px 24px 20px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;box-shadow:var(--ring-shadow);overflow:hidden;transition:transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s,border-color .2s}.mcard:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);opacity:.9}.mcard.done:before{background:var(--ok)}.mcard.new:before{opacity:.35}.mcard:hover{transform:translateY(-4px);box-shadow:var(--lift);border-color:color-mix(in srgb,var(--coral) 42%,transparent)}.mcard-ic{flex:0 0 auto;width:52px;height:52px;border-radius:14px;background:var(--coral-soft);color:var(--coral);display:grid;place-items:center}.mcard.done .mcard-ic{background:var(--ok-bg);color:var(--ok)}.mcard-body{min-width:0;flex:1 1 auto;display:flex;flex-direction:column;gap:9px}.mcard-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.chip{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:650;padding:4px 11px;border-radius:999px;background:var(--surface-2);color:var(--muted);letter-spacing:.01em}.chip.prog{background:var(--grad-soft);color:var(--indigo)}.chip.done{background:var(--ok-bg);color:var(--ok)}.mcard-go{display:inline-flex;align-items:center;gap:5px;font-weight:650;color:var(--coral);font-size:14.5px;opacity:0;transform:translate(-4px);transition:opacity .2s,transform .2s}.mcard:hover .mcard-go{opacity:1;transform:none}.mcard b{font-family:var(--head);font-size:21px;font-weight:650;letter-spacing:-.015em;margin-top:2px}.mcard .sh{color:var(--muted);font-size:14.5px;line-height:1.4;max-width:42ch}.mprog{height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden;margin-top:6px}.mprog i{display:block;height:100%;border-radius:99px;background:var(--grad)}.mcard.done .mprog i{background:var(--ok)}@media (prefers-reduced-motion:no-preference){.mprog i{transition:width .7s cubic-bezier(.2,.7,.2,1)}}.mcard .mmeta{color:var(--faint);font-size:13px;margin-top:3px}.ltop{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:2px 0 18px}.ltop-back{flex:0 0 auto;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;color:var(--ink);text-decoration:none}.ltop-back:hover{border-color:var(--indigo)}.ltop-id{display:flex;flex-direction:column;line-height:1.2;min-width:0}.ltop-id b{font-family:var(--head);font-weight:650;font-size:18px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ltop-id span{color:var(--muted);font-size:13.5px}.chips-mini{display:flex;gap:6px}.cm{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:700;background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}.cm a{color:inherit;text-decoration:none;width:100%;height:100%;display:grid;place-items:center}.cm.done{background:var(--teal);border-color:var(--teal);color:#2b1a08}.cm.cur{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 0 0 3px var(--coral-soft)}.cm.lock{opacity:.5}.view-toggle{display:inline-flex;padding:4px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);margin-left:auto}.view-toggle button{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:999px;border:0;background:transparent;color:var(--muted);font-weight:650;font-size:14.5px}.view-toggle button.on{background:var(--grad);color:#fff;box-shadow:0 6px 14px -8px var(--indigo)}body.imm .shell:not(.noside){grid-template-columns:minmax(0,1fr)!important}body.imm nav.mods{display:none!important}body.imm .lfull{display:none}body.imm .ideck{box-shadow:var(--lift)}body.imm .ideck-stage{min-height:clamp(420px,64vh,680px)}body.imm .islide.cover h2.s-head{font-size:clamp(34px,5vw,60px)}.lfull{animation:none}@media (hover:none){.btn,.view-toggle button{min-height:46px}.ideck-dots b,.deck-dots b{width:14px;height:14px}.opt .face{padding:18px}}@media (max-width:620px){.ltop{gap:10px}.ltop-id b{font-size:16px}.chips-mini{order:3;width:100%;justify-content:flex-start}.view-toggle{margin-left:auto}.ideck-foot{flex-wrap:wrap}.mcard{padding:18px 18px 16px}.hero{padding:30px 22px}}