:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg-page:var(--lightningcss-light,#fff)var(--lightningcss-dark,#101012);--bg-card:var(--lightningcss-light,#f9fafb)var(--lightningcss-dark,#17171d);--bg-tint:var(--lightningcss-light,#f2f4f6)var(--lightningcss-dark,#1e1e26);--bg-inset:var(--lightningcss-light,#eef0f3)var(--lightningcss-dark,#131319);--bg-overlay:var(--lightningcss-light,#ffffff8c)var(--lightningcss-dark,#10101280);--text-primary:var(--lightningcss-light,#191f28)var(--lightningcss-dark,#fff);--text-secondary:var(--lightningcss-light,#333d4b)var(--lightningcss-dark,#8b95a1);--text-muted:var(--lightningcss-light,#6b7684)var(--lightningcss-dark,#6b7280);--text-on-accent:var(--lightningcss-light,#fff)var(--lightningcss-dark,#191f28);--accent:var(--lightningcss-light,#c2410c)var(--lightningcss-dark,#fbbf24);--accent-hover:var(--lightningcss-light,#9a3412)var(--lightningcss-dark,#fcd34d);--accent-bg:var(--lightningcss-light,#ffede0)var(--lightningcss-dark,#fbbf2424);--accent-solid:var(--lightningcss-light,#ea580c)var(--lightningcss-dark,#fbbf24);--good:var(--lightningcss-light,#0d8a5f)var(--lightningcss-dark,#34d399);--good-bg:var(--lightningcss-light,#0d8a5f17)var(--lightningcss-dark,#34d39921);--bad:var(--lightningcss-light,#e0323f)var(--lightningcss-dark,#f04452);--bad-bg:var(--lightningcss-light,#f0445214)var(--lightningcss-dark,#f0445226);--warn-bg:var(--lightningcss-light,#fffaeb)var(--lightningcss-dark,#1e1e26);--border:var(--lightningcss-light,#e5e8eb)var(--lightningcss-dark,#ffffff14);--border-subtle:var(--lightningcss-light,#f2f4f6)var(--lightningcss-dark,#ffffff0a);--border-strong:var(--lightningcss-light,#d3d9e0)var(--lightningcss-dark,#ffffff2e);--shadow-sm:var(--lightningcss-light,0 1px 3px #0000000f)var(--lightningcss-dark,0 1px 3px #0000004d);--shadow-md:var(--lightningcss-light,0 4px 14px #00000014)var(--lightningcss-dark,0 4px 16px #0006);--shadow-lg:var(--lightningcss-light,0 12px 32px #00000024)var(--lightningcss-dark,0 12px 36px #0009);--r-xs:6px;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:20px;--content-w:720px;--sidebar-w:244px;--header-h:54px}*,:before,:after{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 20px)}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}body{background:var(--bg-page);color:var(--text-primary);letter-spacing:-.01em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;word-break:keep-all;overflow-wrap:anywhere;font-family:Pretendard Variable,Pretendard,-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.7;overflow-x:hidden}h1,h2,h3,h4{letter-spacing:-.03em;font-weight:800;line-height:1.35}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:none}ul,ol{list-style:none}img,svg{max-width:100%}b,strong{font-weight:700}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:100;border-radius:var(--r-sm);background:var(--accent);color:var(--text-on-accent);padding:10px 16px;font-weight:700;position:absolute;top:8px;left:8px;transform:translateY(-200%)}.skip-link:focus{color:var(--text-on-accent);transform:translateY(0)}.app{flex-direction:column;min-height:100dvh;display:flex}.hdr{z-index:40;height:calc(var(--header-h) + env(safe-area-inset-top,0px));padding:env(safe-area-inset-top,0px) 14px 0;background:var(--bg-page);border-bottom:1px solid var(--border);align-items:center;gap:10px;display:flex;position:relative}.hdr-brand{min-width:0;color:var(--text-primary);align-items:center;display:flex}.hdr-brand:hover{color:var(--text-primary)}.hdr-logo-wrap{border-radius:var(--r-xs);background:var(--lightningcss-light,#0000)var(--lightningcss-dark,#ffffffeb);flex:none;align-items:center;padding:3px 6px;transition:opacity .15s;display:inline-flex}.hdr-brand:hover .hdr-logo-wrap{opacity:.82}.hdr-logo{width:auto;height:18px;display:block}.hdr-chapter-tag{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;align-items:center;gap:6px;min-width:0;margin-left:6px;font-size:13.5px;font-weight:600;display:inline-flex;overflow:hidden}.hdr-sep{color:var(--text-muted);opacity:.5;flex:none;font-size:13px;font-weight:400}.hdr-chapter-name{color:var(--text-secondary);letter-spacing:-.02em;text-overflow:ellipsis;white-space:nowrap;font-weight:700;overflow:hidden}.hdr-spacer{flex:1}.hdr-btn{border-radius:var(--r-md);background:var(--bg-tint);min-width:44px;height:44px;color:var(--text-secondary);justify-content:center;align-items:center;padding:0;transition:background .15s,color .15s,transform .1s;display:inline-flex}.hdr-btn:hover{background:var(--accent-bg);color:var(--accent)}.hdr-btn:active{transform:scale(.95)}.hdr-btn svg{width:20px;height:20px}@media (width>=1080px){.hdr-toc-btn{display:none}}.progress{z-index:41;pointer-events:none;height:2.5px;position:fixed;top:0;left:0;right:0}.progress-fill{background:var(--accent-solid);transform-origin:0;height:100%;transition:transform .1s linear}.shell{width:100%;max-width:calc(var(--content-w) + var(--sidebar-w) + 96px);flex:1;align-items:flex-start;gap:48px;margin:0 auto;padding:0 18px;display:flex}.main{min-width:0;max-width:var(--content-w);flex:1;padding:22px 0 64px}.side{width:var(--sidebar-w);top:calc(var(--header-h) + 24px);max-height:calc(100dvh - var(--header-h) - 48px);flex:none;padding:28px 0 40px;display:none;position:sticky;overflow-y:auto}@media (width>=1080px){.side{display:block}.shell{padding:0 20px}.main{padding:28px 0 72px}}.side-label{letter-spacing:.06em;color:var(--text-muted);padding:0 12px 8px;font-size:11px;font-weight:800}.toc-list{flex-direction:column;gap:2px;display:flex}.toc-link{border-radius:var(--r-sm);color:var(--text-secondary);align-items:baseline;gap:9px;padding:8px 12px;font-size:14px;font-weight:600;transition:background .14s,color .14s;display:flex}.toc-link:hover{background:var(--bg-tint);color:var(--text-primary)}.toc-link.is-active{background:var(--accent-bg);color:var(--accent);font-weight:700}.toc-num{width:14px;color:var(--text-muted);font-variant-numeric:tabular-nums;flex:none;font-size:12px;font-weight:700}.toc-link.is-active .toc-num{color:var(--accent)}.toc-sep{background:var(--border-subtle);height:1px;margin:10px 12px}.toc-sheet{inset:calc(var(--header-h) + env(safe-area-inset-top,0px)) 0 0;z-index:39;background:var(--bg-page);padding:14px 16px calc(32px + env(safe-area-inset-bottom,0px));animation:.18s ease-out sheet-in;position:fixed;overflow-y:auto}@keyframes sheet-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}.toc-sheet .toc-link{border-radius:var(--r-md);min-height:48px;padding:14px;font-size:16px}.toc-sheet .toc-link:active{background:var(--accent-bg);transform:scale(.99)}.pager{border-top:1px solid var(--border-subtle);flex-direction:column;gap:10px;margin-top:48px;padding-top:24px;display:flex}.pager-empty{display:none}.pager-link{border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-card);color:var(--text-primary);flex-direction:column;gap:4px;padding:15px 16px;transition:border-color .15s,transform .1s,background .15s;display:flex}.pager-link:hover{border-color:var(--accent);color:var(--text-primary)}.pager-link:active{transform:scale(.99)}.pager-link.is-primary{background:var(--bg-card);border-color:var(--border-strong);order:1}.pager-link.is-primary:hover{border-color:var(--accent);background:var(--accent-bg)}.pager-link.is-primary .pager-dir{color:var(--accent)}.pager-link.prev{background:0 0;border-color:#0000;order:2;padding:10px 14px}.pager-link.prev:hover{background:var(--bg-tint);border-color:#0000}.pager-dir{color:var(--text-muted);font-size:12px;font-weight:700}.pager-name{letter-spacing:-.02em;font-size:15px;font-weight:700}@media (width>=560px){.pager{grid-template-columns:1fr 1fr;gap:12px;display:grid}.pager-empty{display:block}.pager-link{background:var(--bg-card);border:1px solid var(--border);padding:14px 16px}.pager-link.prev{text-align:left;background:var(--bg-card);border:1px solid var(--border);order:1;padding:14px 16px}.pager-link.prev:hover{border-color:var(--accent);background:var(--bg-card)}.pager-link.next{text-align:right;order:2}}.ftr{border-top:1px solid var(--border-subtle);padding:22px 18px calc(30px + env(safe-area-inset-bottom,0px));text-align:center;color:var(--text-muted);font-size:13px}.ftr-logo-wrap{border-radius:var(--r-sm);background:var(--lightningcss-light,#0000)var(--lightningcss-dark,#ffffffe6);margin-bottom:12px;padding:7px 12px;display:inline-block}.ftr-logo{width:auto;height:18px;opacity:var(--lightningcss-light,.55)var(--lightningcss-dark,1);display:block}.scroll-top-btn{z-index:50;border-radius:var(--r-md);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);width:44px;height:44px;color:var(--text-primary);box-shadow:var(--shadow-md);cursor:pointer;background:var(--lightningcss-light,#ffffffd9)var(--lightningcss-dark,#1a1a22d9);place-items:center;transition:transform .15s,background .15s,border-color .15s,color .15s,box-shadow .15s;animation:.2s ease-out scroll-top-pop;display:grid;position:fixed;bottom:24px;right:20px}.scroll-top-btn:hover{border-color:var(--accent);color:var(--accent);box-shadow:var(--shadow-lg);background:var(--lightningcss-light,#fff)var(--lightningcss-dark,#252530);transform:translateY(-2px)}.scroll-top-btn:active{transform:scale(.92)}@keyframes scroll-top-pop{0%{opacity:0;transform:translateY(8px)scale(.9)}to{opacity:1;transform:translateY(0)scale(1)}}.ch-head{margin-bottom:36px}.ch-eyebrow{letter-spacing:.01em;color:var(--accent);background:var(--accent-bg);border-radius:var(--r-sm);align-items:center;gap:7px;margin-bottom:14px;padding:5px 11px;font-size:12px;font-weight:800;display:inline-flex}.ch-title{margin-bottom:12px;font-size:clamp(28px,6vw,38px)}.ch-lede{color:var(--text-secondary);font-size:17px;line-height:1.65}.ch-meta{color:var(--text-muted);align-items:center;gap:10px;margin-top:18px;font-size:13px;font-weight:600;display:flex}.sec{margin-top:52px}.sec>h2{scroll-margin-top:calc(var(--header-h) + 20px);margin-bottom:14px;font-size:23px}.sec>h3{margin:30px 0 10px;font-size:18px}.sec p{margin-bottom:15px}.sec p:last-child{margin-bottom:0}.sec p+h3{margin-top:32px}.list{flex-direction:column;gap:10px;margin-bottom:16px;display:flex}.list>li{color:var(--text-secondary);padding-left:18px;position:relative}.list>li:before{content:"";background:var(--text-muted);border-radius:50%;width:5px;height:5px;position:absolute;top:11px;left:3px}.list>li>b,.list>li>strong{color:var(--text-primary)}.steps{counter-reset:step;flex-direction:column;gap:0;margin:24px 0;display:flex;position:relative}.steps>li{counter-increment:step;padding-bottom:24px;padding-left:44px;position:relative}.steps>li:last-child{padding-bottom:0}.steps>li:after{content:"";background:var(--border);width:2px;position:absolute;top:30px;bottom:0;left:13px}.steps>li:last-child:after{display:none}.steps>li:before{content:counter(step);border-radius:var(--r-sm);background:var(--bg-tint);border:1px solid var(--border-strong);width:28px;height:28px;color:var(--accent);box-shadow:var(--shadow-sm);place-items:center;font-size:13px;font-weight:800;display:grid;position:absolute;top:0;left:0}.steps h4{color:var(--text-primary);letter-spacing:-.02em;margin-bottom:5px;font-size:16px;font-weight:800}.steps p{color:var(--text-secondary);margin-bottom:0;line-height:1.6}.steps p em{color:var(--text-muted);margin-top:4px;font-size:13.5px;font-style:normal;display:block}.atlas-tile{background-repeat:no-repeat;display:block}.note{border-radius:var(--r-lg);border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);margin:22px 0;padding:18px 20px;font-size:15px}.note-title{color:var(--text-primary);letter-spacing:-.01em;margin-bottom:6px;font-size:14.5px;font-weight:800;display:block}.note p{margin-bottom:10px}.note p:last-child{margin-bottom:0}.note.tip{background:var(--bg-card);border:1px solid var(--border)}.note.tip .note-title{color:var(--text-primary)}.note.warn{background:var(--bg-card);border:1px solid var(--border)}.note.warn .note-title{color:var(--bad)}.note.gear{background:var(--bg-card);border:1px solid var(--border)}.note.gear .note-title{color:var(--text-primary)}.guide-cards{flex-direction:column;gap:10px;margin:20px 0;display:flex}.guide-card-item{border-radius:var(--r-md);background:var(--bg-card);border:1px solid var(--border);align-items:center;gap:16px;padding:16px 20px;display:flex}@media (width<=560px){.guide-card-item{flex-direction:column;align-items:flex-start;gap:10px}}.guide-card-val{color:var(--text-primary);background:var(--bg-tint);border-radius:var(--r-sm);border:1px solid var(--border);letter-spacing:-.01em;text-align:center;flex:none;min-width:100px;padding:7px 12px;font-size:14px;font-weight:800}.guide-card-info{flex:1}.guide-card-name{color:var(--text-primary);letter-spacing:-.01em;margin-bottom:3px;font-size:14.5px;font-weight:800}.guide-card-desc{color:var(--text-secondary);margin:0;font-size:13.5px;line-height:1.5}.vs{grid-template-columns:1fr;gap:12px;margin:22px 0;display:grid}@media (width>=560px){.vs{grid-template-columns:1fr 1fr}}.vs-card{border-radius:var(--r-md);border:1px solid var(--border);background:var(--bg-card);overflow:hidden}.vs-card figure{display:block}.vs-tag{align-items:center;gap:6px;padding:10px 14px;font-size:13px;font-weight:800;display:flex}.vs-card.ok .vs-tag{color:var(--good);background:var(--good-bg)}.vs-card.no .vs-tag{color:var(--bad);background:var(--bad-bg)}.vs-body{color:var(--text-secondary);padding:12px 14px 14px;font-size:14px}.example-frame{aspect-ratio:16/9;object-fit:cover;background:#050607;width:100%;height:auto;display:block}.exposure-compare .vs-tag{border-top:1px solid var(--border-subtle)}.exposure-example .fig-cap{line-height:1.65}.fig{border-radius:var(--r-lg);border:1px solid var(--border);background:var(--bg-card);margin:24px 0;overflow:hidden}.fig-stage{background:var(--bg-inset);padding:20px}.fig-cap{color:var(--text-muted);border-top:1px solid var(--border-subtle);padding:12px 16px 14px;font-size:13.5px}.fig-cap b{color:var(--text-secondary)}.term{color:var(--text-primary);border-bottom:2px solid var(--accent-solid);cursor:help;padding-bottom:.5px;font-weight:700}.term:hover{background:var(--accent-bg)}.term-pop{z-index:60;border-radius:var(--r-md);background:var(--bg-page);border:1px solid var(--border-strong);width:360px;max-width:min(360px,100vw - 32px);box-shadow:var(--shadow-lg);color:var(--text-secondary);padding:13px 15px;font-size:14px;line-height:1.6;display:block;position:fixed}.term-pop-name{color:var(--text-primary);margin-bottom:3px;font-size:14px;font-weight:800;display:block}.term-pop-en{color:var(--text-muted);margin-left:6px;font-size:12px;font-weight:600}.term-pop-body{grid-template-columns:96px minmax(0,1fr);align-items:start;gap:12px;display:grid}.term-illustration{aspect-ratio:1;border-radius:var(--r-md);background-color:#191d23;width:100%;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff14}.term-sheet-backdrop{z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000085;justify-content:center;align-items:flex-end;animation:.18s ease-out term-fade;display:flex;position:fixed;inset:0}@keyframes term-fade{0%{opacity:0}to{opacity:1}}.term-sheet{background:var(--bg-page);border:1px solid var(--border-strong);width:100%;max-width:560px;min-height:250px;box-shadow:var(--shadow-lg);padding:12px 20px calc(24px + env(safe-area-inset-bottom,0px));border-bottom:none;border-top-left-radius:22px;border-top-right-radius:22px;flex-direction:column;animation:.24s cubic-bezier(.16,1,.3,1) term-sheet-slide;display:flex}@keyframes term-sheet-slide{0%{transform:translateY(100%)}to{transform:translateY(0)}}.term-sheet-handle{background:var(--border-strong);border-radius:3px;flex:none;width:38px;height:4.5px;margin:4px auto 16px}.term-sheet-head{margin-bottom:12px}.term-sheet-name{color:var(--text-primary);align-items:baseline;gap:8px;font-size:20px;font-weight:800;display:flex}.term-sheet-en{color:var(--text-muted);font-size:13.5px;font-style:normal;font-weight:600}.term-sheet-def{color:var(--lightningcss-light,#191f28)var(--lightningcss-dark,#fff);margin:0;font-size:15.5px;line-height:1.65}.term-sheet-body{flex:1;grid-template-columns:124px minmax(0,1fr);align-items:start;gap:16px;margin-bottom:24px;display:grid}.term-sheet-foot{margin-top:auto}.term-sheet-btn{border-radius:var(--r-md);background:var(--accent-solid);color:#fff;justify-content:center;align-items:center;width:100%;height:50px;font-size:15.5px;font-weight:800;transition:opacity .15s,transform .1s;display:flex}.term-sheet-btn:hover{opacity:.92}.term-sheet-btn:active{opacity:.85;transform:scale(.98)}.check{border:1px solid var(--border);border-radius:var(--r-md);flex-direction:column;gap:2px;margin:20px 0;display:flex;overflow:hidden}.check>li{border-bottom:1px solid var(--border-subtle)}.check>li:last-child{border-bottom:none}.check label{cursor:pointer;align-items:flex-start;gap:11px;padding:13px 15px;font-size:15px;transition:background .14s;display:flex}.check label:hover{background:var(--bg-card)}.check input{display:none}.check-box{border:2px solid var(--border-strong);border-radius:6px;flex:none;place-items:center;width:20px;height:20px;margin-top:2px;transition:background .14s,border-color .14s;display:grid}.check-box svg{opacity:0;color:#fff;width:12px;height:12px}.check input:checked+.check-box{background:var(--good);border-color:var(--good)}.check input:checked+.check-box svg{opacity:1}.check input:checked~.check-text{color:var(--text-muted);text-decoration:line-through}.check-text{color:var(--text-primary)}.table-scroll{border:1px solid var(--border);border-radius:var(--r-md);-webkit-overflow-scrolling:touch;background:linear-gradient(to right, var(--bg-card) 30%, #fff0), linear-gradient(to right, #fff0, var(--bg-card) 70%) 0 100%, radial-gradient(farthest-side at 0% 50%, #0000001f, #0000), radial-gradient(farthest-side at 100% 50%, #0000001f, #0000) 0 100%;background-repeat:no-repeat;background-color:var(--bg-card);background-position:0 0,100% 0,0 0,100% 0;background-size:40px 100%,40px 100%,14px 100%,14px 100%;background-attachment:local,local,scroll,scroll;margin:22px 0;overflow-x:auto}.table{border-collapse:collapse;white-space:nowrap;width:100%;font-size:14.5px}.table th,.table td{text-align:left;border-bottom:1px solid var(--border-subtle);padding:11px 14px}.table thead th{background:var(--bg-tint);color:var(--text-secondary);font-size:13px;font-weight:700}.table tbody tr:last-child td{border-bottom:none}.table td b{color:var(--text-primary)}.ch-cards-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px;margin-top:36px;margin-bottom:12px;padding:0 2px;display:flex}.ch-cards-title{color:var(--text-primary);letter-spacing:-.02em;font-size:14px;font-weight:800}.ch-cards-hint{color:var(--text-muted);font-size:12.5px;font-weight:600}.ch-cards{gap:12px;display:grid}.ch-card{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-card);color:var(--text-primary);box-shadow:var(--lightningcss-light,0 1px 3px #00000008)var(--lightningcss-dark,none);padding:18px 20px;transition:border-color .16s,transform .16s,box-shadow .16s;display:block}.ch-card:hover{color:var(--text-primary);border-color:var(--accent);box-shadow:var(--lightningcss-light,0 6px 18px #0000000f)var(--lightningcss-dark,var(--shadow-md));transform:translateY(-2px)}.ch-card-top{align-items:center;gap:10px;margin-bottom:8px;display:flex}.ch-card-num{background:var(--lightningcss-light,var(--accent-solid))var(--lightningcss-dark,#fbbf2429);color:var(--lightningcss-light,#fff)var(--lightningcss-dark,#fbbf24);border-radius:8px;flex:none;place-items:center;width:26px;height:26px;font-size:13px;font-weight:800;display:grid}.ch-card-name{color:var(--text-primary);letter-spacing:-.02em;font-size:17px;font-weight:800}.ch-card-min{color:var(--text-muted);margin-left:auto;font-size:12px;font-weight:600}.ch-card-sum{color:var(--text-secondary);font-size:14.5px;line-height:1.6}.ch-card-tags{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.tag{color:var(--lightningcss-light,#4e5968)var(--lightningcss-dark,#a1a1aa);background:var(--bg-tint);border-radius:var(--r-xs);padding:3.5px 9px;font-size:12px;font-weight:600}.gloss{border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden}.gloss-row{border-bottom:1px solid var(--border-subtle);scroll-margin-top:calc(var(--header-h) + 20px);grid-template-columns:104px minmax(0,1fr);align-items:start;gap:15px;padding:15px 17px;display:grid}.gloss-row:last-child{border-bottom:none}.gloss-copy{min-width:0}.gloss dt{margin-bottom:4px;font-size:15.5px;font-weight:800}.gloss dt em{color:var(--text-muted);margin-left:7px;font-size:12.5px;font-style:normal;font-weight:600}.gloss dd{color:var(--text-secondary);font-size:14.5px;line-height:1.6}.gloss-link{width:fit-content;margin-top:7px;font-size:13px;font-weight:700;display:block}.checklist{margin:20px 0}.checklist .check{margin:0}.checklist-foot{color:var(--text-muted);justify-content:space-between;align-items:center;padding:10px 4px 0;font-size:13px;font-weight:700;display:flex}.checklist-foot button{color:var(--accent);font-size:13px;font-weight:700}.checklist-foot button:disabled{color:var(--text-muted);opacity:.5;cursor:default}.dim-cell{color:var(--text-muted);font-size:12.5px;font-weight:600}.yt{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-card);margin:24px 0;overflow:hidden}.yt-frame{aspect-ratio:16/9;background:#000;position:relative}.yt-frame iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.yt-cover{width:100%;padding:0;display:block;position:absolute;inset:0}.yt-cover img{object-fit:cover;opacity:.85;width:100%;height:100%;transition:opacity .2s;display:block}.yt-cover:hover img{opacity:1}.yt-play{color:#fff;background:#0000009e;border-radius:50%;place-items:center;width:58px;height:58px;transition:background .2s,transform .2s;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.yt-cover:hover .yt-play{background:var(--accent-solid);color:var(--text-on-accent);transform:translate(-50%,-50%)scale(1.06)}.yt-play svg{width:24px;height:24px;margin-left:3px}.yt-title{text-align:left;color:#fff;text-shadow:0 1px 4px #000c;font-size:14px;font-weight:700;position:absolute;bottom:12px;left:14px;right:14px}.yt figcaption{color:var(--text-muted);border-top:1px solid var(--border-subtle);padding:12px 16px 14px;font-size:13.5px}@media (width<=420px){.ch-head{margin-bottom:30px}.ch-lede{font-size:16px}.sec{margin-top:44px}.sec>h2{font-size:21px}.sec>h3{font-size:17px}.steps>li{padding-left:36px}.steps>li:before{width:25px;height:25px;font-size:12px}.note{padding:14px 16px}.gloss-row{grid-template-columns:78px minmax(0,1fr);gap:12px;padding:14px 15px}.ch-card{padding:16px 17px}.ch-card-name{font-size:16px}.term-pop{max-width:calc(100vw - 24px)}.term-sheet-body{grid-template-columns:104px minmax(0,1fr);gap:13px}}@media (width<=350px){.term-sheet-body{grid-template-columns:88px minmax(0,1fr)}}.fold{border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-card);margin:18px 0;overflow:hidden}.fold+.fold{margin-top:10px}.fold>summary{cursor:pointer;align-items:center;gap:12px;padding:15px 16px;list-style:none;transition:background .15s;display:flex}.fold>summary::-webkit-details-marker{display:none}.fold>summary:hover{background:var(--bg-tint)}.fold-title{min-width:0;color:var(--text-primary);letter-spacing:-.02em;flex:1;font-size:15px;font-weight:800}.fold-title em{color:var(--text-muted);letter-spacing:0;margin-top:3px;font-size:13px;font-style:normal;font-weight:500;display:block}.fold-arrow{width:20px;height:20px;color:var(--text-muted);flex:none;transition:transform .2s}.fold[open]>summary .fold-arrow{transform:rotate(180deg)}.fold-body{border-top:1px solid var(--border-subtle);padding:2px 16px 18px}.fold-body>:first-child{margin-top:16px}.fold-body p{margin-bottom:12px}.fold-body p:last-child,.fold-body .list:last-child,.fold-body .steps:last-child{margin-bottom:0}.fold-body h4{margin-bottom:5px;font-size:15px}.demo{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-card);margin:26px 0;overflow:hidden}.monitor{aspect-ratio:16/9;background:#0b0f15;position:relative;overflow:hidden}.monitor-svg{width:100%;height:100%;display:block}.monitor-rec,.monitor-label{letter-spacing:.04em;color:#ffffffe6;text-shadow:0 1px 3px #0009;pointer-events:none;font-size:11px;font-weight:800;position:absolute}.monitor-rec{align-items:center;gap:5px;display:flex;top:10px;right:12px}.monitor-rec i{background:#ff4d4d;border-radius:50%;width:7px;height:7px;animation:1.6s ease-in-out infinite rec-blink}@keyframes rec-blink{0%,45%{opacity:1}55%,to{opacity:.15}}.monitor-label{font-size:13px;bottom:10px;left:12px}.monitor-label em{color:#fff9;margin-left:5px;font-size:11px;font-style:normal;font-weight:600}.seg{scrollbar-width:none;border-bottom:1px solid var(--border-subtle);-webkit-overflow-scrolling:touch;gap:6px;padding:12px 14px;display:flex;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 28px),#0000 100%);mask-image:linear-gradient(90deg,#000 calc(100% - 28px),#0000 100%)}.seg::-webkit-scrollbar{display:none}.seg-btn{border-radius:var(--r-sm);background:var(--bg-tint);min-height:38px;color:var(--text-secondary);white-space:nowrap;flex:none;padding:9px 15px;font-size:13.5px;font-weight:700;transition:background .15s,color .15s,transform .1s}.seg-btn:hover{color:var(--text-primary)}.seg-btn:active{transform:scale(.96)}.seg-btn.is-on{background:var(--accent-solid);color:var(--text-on-accent)}.shot-info{align-items:flex-start;gap:16px;padding:16px 18px 18px;display:flex}.cut-guide{width:34px;height:108px;color:var(--text-muted);background:var(--bg-inset);border-radius:var(--r-sm);flex:none;padding:5px 0}.shot-cut{color:var(--text-primary);margin-bottom:5px;font-size:15px;font-weight:800}.shot-use{color:var(--text-secondary);margin:0;font-size:14.5px;line-height:1.6}.slider-row{border-bottom:1px solid var(--border-subtle);align-items:center;gap:12px;padding:14px 18px;display:flex}.slider-row label{width:66px;color:var(--text-secondary);flex:none;font-size:13.5px;font-weight:700}.slider-row output{text-align:right;font-variant-numeric:tabular-nums;min-width:52px;color:var(--text-primary);flex:none;font-size:14px;font-weight:800}input[type=range]{appearance:none;cursor:pointer;touch-action:pan-y;background:0 0;flex:1;min-width:0;height:32px}input[type=range]::-webkit-slider-runnable-track{border-radius:var(--r-sm);background:var(--bg-tint);height:6px}input[type=range]::-moz-range-track{border-radius:var(--r-sm);background:var(--bg-tint);height:6px}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--accent-solid);border:3px solid var(--bg-card);width:22px;height:22px;box-shadow:var(--shadow-md);border-radius:50%;margin-top:-8px;transition:transform .12s}input[type=range]:active::-webkit-slider-thumb{transform:scale(1.18)}input[type=range]::-moz-range-thumb{background:var(--accent-solid);border:3px solid var(--bg-card);width:22px;height:22px;box-shadow:var(--shadow-md);border-radius:50%;transition:transform .12s}input[type=range]:active::-moz-range-thumb{transform:scale(1.18)}@media (width<=480px){.slider-row{flex-wrap:wrap;gap:4px 0;padding:12px 16px}.slider-row label{flex:1;width:auto;font-size:13px}.slider-row output{text-align:right;flex:none;font-size:13.5px}.slider-row input[type=range]{flex:100%;width:100%;margin-top:2px}}.monitor-verdict{border-radius:var(--r-sm);color:#fff;pointer-events:none;background:#cf3341e6;padding:5px 11px;font-size:12px;font-weight:800;position:absolute;bottom:10px;left:12px}.monitor-verdict.ok{background:#0f915ceb}.demo-note{color:var(--text-secondary);margin:0;padding:15px 18px 17px;font-size:14.5px;line-height:1.65}.demo-note b{color:var(--text-primary)}.readout{border-top:1px solid var(--border-subtle);flex-direction:column;display:flex}.readout>div{border-bottom:1px solid var(--border-subtle);padding:12px 18px}.readout dt{color:var(--text-primary);font-variant-numeric:tabular-nums;margin-bottom:2px;font-size:13.5px;font-weight:800}.readout dd{color:var(--text-secondary);font-size:14px;line-height:1.55}.demo-foot{text-align:center;padding:13px 18px 15px}.demo-reset{color:var(--accent);border-radius:var(--r-sm);background:var(--accent-bg);padding:7px 14px;font-size:13.5px;font-weight:700}.monitor-hint{color:#ffd400;text-shadow:0 1px 3px #000c;pointer-events:none;font-size:11.5px;font-weight:700;position:absolute;bottom:10px;right:12px}.monitor-noise{pointer-events:none;mix-blend-mode:overlay;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23n)'/></svg>");background-size:140px 140px;position:absolute;inset:0}.grid-lines line{stroke:#fff;stroke-width:1.6px;stroke-dasharray:10 8;vector-effect:non-scaling-stroke}.verdicts{border-top:1px solid var(--border-subtle)}.verdicts>li{border-bottom:1px solid var(--border-subtle);color:var(--text-secondary);align-items:baseline;gap:12px;padding:12px 18px;font-size:14.5px;display:flex}.verdicts>li:last-child{border-bottom:none}.verdicts b{flex:none;width:62px;font-size:13px;font-weight:800}.verdicts .ok b{color:var(--good)}.verdicts .no b{color:var(--bad)}.timeline{scrollbar-width:none;gap:3px;padding:14px 18px 0;display:flex;overflow-x:auto}.timeline::-webkit-scrollbar{display:none}.timeline-seg{border-radius:var(--r-sm);background:var(--bg-tint);min-width:54px;color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;flex:1 1 0;padding:9px 4px;font-size:12px;font-weight:700;transition:background .15s,color .15s;overflow:hidden}.timeline-seg.is-on{background:var(--accent-solid);color:var(--text-on-accent)}.timeline-mood{color:var(--text-secondary);margin:0;padding:11px 18px 14px;font-size:14.5px}.cams{border-top:1px solid var(--border-subtle)}.cams>li{border-bottom:1px solid var(--border-subtle);align-items:flex-start;gap:12px;padding:11px 18px;display:flex}.cams>li:last-child{border-bottom:none}.cam-no{color:#fff;border-radius:7px;flex:none;place-items:center;width:24px;height:24px;font-size:12px;font-weight:800;display:grid}.cam-fix{background:var(--good)}.cam-move{background:var(--accent-solid);color:var(--text-on-accent)}.cam-body{flex-wrap:wrap;align-items:baseline;gap:4px 8px;font-size:14.5px;display:flex}.cam-body b{font-weight:800}.cam-body em{color:var(--text-muted);background:var(--bg-tint);border-radius:var(--r-sm);padding:2px 7px;font-size:11.5px;font-style:normal;font-weight:700}.cam-body>span{color:var(--text-secondary);flex-basis:100%;font-size:13.5px}input[type=range]::-webkit-slider-runnable-track{border-radius:4px}input[type=range]::-moz-range-track{border-radius:4px}.seg-btn{padding:10px 14px;font-size:14px}.cam-body em{border-radius:var(--r-xs)}@media (width<=420px){.seg{padding:10px 12px}.shot-info{gap:12px;padding:14px 14px 16px}.readout>div,.timeline-mood,.demo-note,.cams>li{padding-left:14px;padding-right:14px}.timeline{padding:12px 14px 0}.verdicts>li{flex-direction:column;gap:3px;padding:11px 14px}.verdicts b{width:auto}}