@font-face{font-family:Inter;font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/inter-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@view-transition{navigation:auto}:root{--paper: #fcfbf9;--paper-raised: #ffffff;--paper-sunk: #f4f2ee;--ink: #14161a;--ink-soft: #565d68;--ink-faint: #8d94a0;--rule: #e6e3dd;--rule-strong: #cfcbc2;--c-teach: #3b5bdb;--c-teach-ink: #2f4fc9;--c-teach-wash: #eef1fd;--c-learn: #c86a2a;--c-learn-ink: #a9531b;--c-learn-wash: #fdf2e8;--accent: var(--c-teach);--accent-ink: var(--c-teach-ink);--accent-wash: var(--c-teach-wash);--accent-2: #6b4fe0;--grad: linear-gradient(115deg, var(--c-teach) 0%, var(--accent-2) 100%);--shadow-sm: 0 1px 2px rgba(20, 22, 26, .04), 0 2px 8px rgba(20, 22, 26, .04);--shadow-md: 0 2px 4px rgba(20, 22, 26, .04), 0 12px 32px rgba(20, 22, 26, .07);--sans: "Inter", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic Medium", Meiryo, system-ui, sans-serif;--mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, monospace;--measure: 40rem;--measure-wide: 72rem;--gutter: 20px;--radius: 14px;--radius-sm: 8px;--header-h: 68px;color-scheme:light}[data-side=learn]{--accent: var(--c-learn);--accent-ink: var(--c-learn-ink);--accent-wash: var(--c-learn-wash);--accent-2: #e0a03c;--grad: linear-gradient(115deg, var(--c-learn) 0%, var(--accent-2) 100%)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.9;letter-spacing:.015em;font-feature-settings:"palt" 1;-webkit-font-smoothing:antialiased}.wrap{max-width:var(--measure);margin-inline:auto;padding-inline:var(--gutter)}.wrap-wide{max-width:var(--measure-wide);margin-inline:auto;padding-inline:var(--gutter)}h1,h2,h3,h4{font-weight:700;line-height:1.45;letter-spacing:-.02em;margin:0}h1{font-size:clamp(1.75rem,1.1rem + 2.6vw,2.6rem)}h2{font-size:clamp(1.3rem,1.1rem + .8vw,1.55rem);margin:3.4em 0 1em}h3{font-size:1.1rem;margin:2.4em 0 .7em}p{margin:0 0 1.7em}ul,ol{padding-left:1.4em;margin:0 0 1.7em}li{margin-bottom:.55em}li::marker{color:var(--accent)}strong{font-weight:700}a{color:var(--accent-ink);text-underline-offset:4px;text-decoration-thickness:1px}hr{border:none;border-top:1px solid var(--rule);margin:3.5em 0}code{font-family:var(--mono);font-size:.88em;background:var(--paper-sunk);padding:.12em .4em;border-radius:4px}img{max-width:100%;height:auto}::selection{background:var(--accent-wash);color:var(--accent-ink)}table{width:100%;border-collapse:separate;border-spacing:0;margin:0 0 1.9em;font-size:.92em;line-height:1.75;display:block;overflow-x:auto;border:1px solid var(--rule);border-radius:var(--radius-sm);background:var(--paper-raised)}th,td{padding:.75em 1.1em;text-align:left;vertical-align:top;border-bottom:1px solid var(--rule)}thead th{font-weight:700;white-space:nowrap;background:var(--paper-sunk)}tbody tr:last-child>*{border-bottom:none}tbody th{font-weight:600;white-space:nowrap}.site-header{position:sticky;top:0;z-index:30;padding:12px var(--gutter);background:linear-gradient(var(--paper) 55%,transparent)}.site-header__inner{max-width:var(--measure-wide);margin-inline:auto;display:flex;align-items:center;gap:1rem;padding:8px 10px 8px 14px;background:color-mix(in srgb,var(--paper-raised) 82%,transparent);backdrop-filter:saturate(1.6) blur(14px);border:1px solid var(--rule);border-radius:999px;box-shadow:var(--shadow-sm)}.site-logo{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--ink)}.site-logo__mark{display:grid;place-items:center;width:26px;height:26px}.site-logo__mark svg{display:block;overflow:visible}.site-logo__mark svg path{transition:transform .4s cubic-bezier(.2,.8,.2,1)}.site-logo:hover .logo-l{transform:translate(-38px)}.site-logo:hover .logo-r{transform:translate(38px)}.site-logo__name{font-size:1.05rem;font-weight:700;letter-spacing:.01em;white-space:nowrap}.site-logo__sub{font-size:.66rem;color:var(--ink-faint);letter-spacing:.08em}@media(max-width:640px){.site-logo__sub{display:none}}.site-nav{margin-left:auto;display:flex;align-items:center;gap:.25rem}.site-nav a{color:var(--ink-soft);text-decoration:none;font-size:.86rem;font-weight:500;padding:.45em .9em;border-radius:999px;white-space:nowrap;transition:background-color .18s,color .18s}.site-nav a:hover{background:var(--accent-wash);color:var(--accent-ink)}@media(max-width:560px){.site-header{padding:10px 12px}.site-header__inner{gap:.4rem;padding:7px 8px 7px 11px}.site-nav{gap:0}.site-nav a{padding:.4em .5em;font-size:.75rem}.site-logo__name{font-size:.97rem}.site-logo__mark{width:22px;height:22px}.site-logo__mark svg{width:22px;height:22px}}@media(max-width:390px){.site-nav a:last-child{display:none}}.hero{position:relative;padding:clamp(3.5rem,8vw,7rem) 0 clamp(2.5rem,5vw,4rem);overflow:hidden}.hero:before{content:"";position:absolute;z-index:-1;top:-34%;left:50%;width:min(880px,130%);aspect-ratio:1;transform:translate(-50%);background:radial-gradient(circle at 50% 50%,color-mix(in srgb,var(--accent) 13%,transparent) 0%,color-mix(in srgb,var(--accent-2) 8%,transparent) 42%,transparent 68%);pointer-events:none}.hero h1{margin-bottom:.45em}.hero p{color:var(--ink-soft);margin-bottom:0;font-size:clamp(.95rem,.9rem + .2vw,1.05rem)}.hero__grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.section-title{display:flex;align-items:baseline;gap:.7rem;font-size:.78rem;font-weight:700;letter-spacing:.14em;color:var(--ink-faint);margin:4.5rem 0 1.2rem;padding:0;border:none}.section-title:after{content:"";flex:1;height:1px;background:var(--rule)}.post-list{list-style:none;padding:0;margin:0;counter-reset:post}.post-list li{counter-increment:post}.post-list a{position:relative;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:0 1.1rem;padding:1.5rem 1rem;margin-inline:-1rem;text-decoration:none;color:inherit;border-radius:var(--radius);transition:background-color .2s,box-shadow .2s}.post-list a:before{content:counter(post,decimal-leading-zero);grid-row:1 / 3;font-size:.78rem;font-weight:700;color:var(--ink-faint);font-variant-numeric:tabular-nums;transition:color .2s}.post-list a:hover{background:var(--paper-raised);box-shadow:var(--shadow-md)}.post-list a:hover:before{color:var(--accent)}.post-list__topic{grid-column:2;font-size:.71rem;color:var(--ink-faint);letter-spacing:.1em;font-weight:600}.post-list__title{grid-column:2;font-weight:700;font-size:1.06rem;line-height:1.6;letter-spacing:-.01em}.post-list__arrow{grid-row:1 / 3;grid-column:3;color:var(--ink-faint);opacity:0;transform:translate(-6px);transition:opacity .2s,transform .25s cubic-bezier(.2,.8,.2,1),color .2s}.post-list a:hover .post-list__arrow{opacity:1;transform:translate(0);color:var(--accent)}.post-list li+li a{box-shadow:none}.post-list li+li{border-top:1px solid var(--rule)}.post-list li+li a:hover{box-shadow:var(--shadow-md)}.card-grid{display:grid;gap:14px}@media(min-width:680px){.card-grid--2{grid-template-columns:1fr 1fr}}.card{position:relative;overflow:hidden;background:var(--paper-raised);border:1px solid var(--rule);border-radius:var(--radius);padding:1.7rem 1.6rem 1.6rem;text-decoration:none;color:inherit;display:block;transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s,border-color .25s}.card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:0 50%;transition:transform .35s cubic-bezier(.2,.8,.2,1)}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:transparent}.card:hover:before{transform:scaleX(1)}.card__title{display:flex;align-items:center;gap:.45rem;font-weight:700;font-size:1.1rem;line-height:1.5;margin:0 0 .4em;letter-spacing:-.01em}.card__title svg{transition:transform .25s cubic-bezier(.2,.8,.2,1);color:var(--accent)}.card:hover .card__title svg{transform:translate(4px)}.card__desc{font-size:.87rem;color:var(--ink-soft);margin:0;line-height:1.75}.article-layout{max-width:var(--measure-wide);margin-inline:auto;padding-inline:var(--gutter)}@media(min-width:1080px){.article-layout{display:grid;grid-template-columns:15rem minmax(0,var(--measure));gap:4rem;justify-content:center;align-items:start}.article-aside{position:sticky;top:calc(var(--header-h) + 24px)}}.article-aside{font-size:.8rem;color:var(--ink-faint)}@media(max-width:1079px){.article-aside{margin-bottom:2.5rem}}.breadcrumb{font-size:.78rem;color:var(--ink-faint);margin:1.6rem 0;letter-spacing:.03em}.breadcrumb a{color:var(--ink-faint);text-decoration:none}.breadcrumb a:hover{color:var(--accent-ink)}.pill{display:inline-block;font-size:.71rem;line-height:1.7;font-weight:600;padding:.18em .8em;border-radius:999px;margin:0 .3em .3em 0;background:var(--accent-wash);color:var(--accent-ink);text-decoration:none;white-space:nowrap;letter-spacing:.04em;transition:background-color .18s}.pill--plain{background:var(--paper-sunk);color:var(--ink-soft)}.meta-block{display:grid;gap:.3rem;padding:.9rem 0;border-top:1px solid var(--rule);margin-top:1.2rem}.meta-block dt{font-size:.68rem;letter-spacing:.1em;color:var(--ink-faint);font-weight:700}.meta-block dd{margin:0 0 .7rem;font-size:.82rem;color:var(--ink-soft)}.toc{margin:1.4rem 0 0}.toc__title{font-size:.68rem;font-weight:700;letter-spacing:.12em;color:var(--ink-faint);margin:0 0 .7rem}.toc ol{margin:0;padding:0;list-style:none;counter-reset:toc}.toc li{counter-increment:toc;margin-bottom:.1em}.toc a{display:grid;grid-template-columns:1.6em 1fr;gap:.2rem;padding:.38em .6em;margin-inline:-.6em;border-radius:var(--radius-sm);color:var(--ink-soft);text-decoration:none;font-size:.82rem;line-height:1.6;transition:background-color .18s,color .18s}.toc a:before{content:counter(toc);color:var(--ink-faint);font-variant-numeric:tabular-nums;font-size:.75em}.toc a:hover{background:var(--accent-wash);color:var(--accent-ink)}.note{position:relative;background:var(--paper-raised);border:1px solid var(--rule);border-left:3px solid var(--accent);padding:1.1rem 1.4rem;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:0 0 1.9em;font-size:.93em;line-height:1.85;box-shadow:var(--shadow-sm)}.note>:last-child{margin-bottom:0}.sources{margin:3.5rem 0 0;padding:1.4rem 1.5rem;background:var(--paper-sunk);border-radius:var(--radius)}.sources__title{font-size:.7rem;font-weight:700;letter-spacing:.12em;color:var(--ink-faint);margin:0 0 .7rem}.sources ul{font-size:.84rem;margin:0;padding-left:1.2em}.sources li{margin-bottom:.4em;color:var(--ink-soft)}.related{margin-top:4rem}.trust{border-top:1px solid var(--rule);background:var(--paper-sunk);padding:2.6rem 0;margin-top:6rem}.trust__inner{display:grid;gap:1.6rem}@media(min-width:760px){.trust__inner{grid-template-columns:1.4fr 1fr;gap:3rem}}.trust h2{font-size:.97rem;margin:0 0 .6em}.trust p{font-size:.85rem;color:var(--ink-soft);margin:0 0 .8em;line-height:1.85}.trust p:last-child{margin-bottom:0}.trust__links{display:grid;gap:.5rem;align-content:start;font-size:.85rem}.trust__links p{margin:0}.site-footer{border-top:1px solid var(--rule);background:var(--paper-raised);padding:2.4rem 0;font-size:.8rem;color:var(--ink-faint)}.site-footer a{color:var(--ink-soft);text-decoration:none}.site-footer a:hover{color:var(--accent-ink)}.footer-links{display:flex;flex-wrap:wrap;gap:.7rem 1.4rem;margin-bottom:1.3rem}.field{margin-bottom:1.4rem}.field label{display:block;font-size:.85rem;font-weight:700;margin-bottom:.4em;color:var(--ink-soft)}.field input,.field textarea{width:100%;padding:.75em .95em;font-size:1rem;font-family:inherit;line-height:1.8;color:var(--ink);background:var(--paper-raised);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);transition:border-color .18s,box-shadow .18s}.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-wash)}.btn{background:var(--grad);color:#fff;border:none;padding:.8em 2.2em;border-radius:999px;font-size:.98rem;font-weight:700;font-family:inherit;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .2s}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}@supports (animation-timeline: view()){@media(prefers-reduced-motion:no-preference){.reveal{animation:reveal-in linear both;animation-timeline:view();animation-range:entry 0% entry 42%}@keyframes reveal-in{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}}.progress{position:fixed;inset:0 0 auto;height:2px;z-index:40;background:var(--grad);transform-origin:0 50%;animation:progress-grow linear both;animation-timeline:scroll(root block)}@keyframes progress-grow{0%{transform:scaleX(0)}to{transform:scaleX(1)}}}:where(h2,h3){scroll-margin-top:calc(var(--header-h) + 20px)}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:8px;top:8px;background:var(--paper-raised);padding:.5em 1em;z-index:100;border-radius:var(--radius-sm)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}html{scroll-behavior:auto}@view-transition{navigation:none}}.facing{--axis: 1px;display:grid;gap:0;margin-top:3.5rem}@media(min-width:860px){.facing{grid-template-columns:1fr var(--axis) 1fr;align-items:stretch}.facing__axis{background:linear-gradient(var(--c-teach),var(--c-learn));opacity:.25}.facing__side--teach{padding-right:2.6rem;text-align:right}.facing__side--learn{padding-left:2.6rem}.facing__side--teach .post-list a{grid-template-columns:auto 1fr auto;direction:rtl}.facing__side--teach .post-list a>*{direction:ltr}.facing__side--teach .post-list a:before{direction:ltr}.facing__side--teach .post-list__arrow{transform:translate(6px) scaleX(-1)}.facing__side--teach .post-list a:hover .post-list__arrow{transform:translate(0) scaleX(-1)}.facing__side--teach .section-title{flex-direction:row-reverse}}@media(max-width:859px){.facing__axis{height:1px;background:var(--rule);margin:3rem 0}.facing__side--learn{margin-top:0}}.facing__head{margin-bottom:.5rem}.facing__label{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;font-weight:700;letter-spacing:.14em;color:var(--accent-ink)}.facing__label:before,.facing__label:after{content:"";width:18px;height:1px;background:currentColor;opacity:.4}.facing h2{font-size:clamp(1.25rem,1.05rem + .8vw,1.5rem);margin:.5rem 0 .4rem}.facing__desc{font-size:.87rem;color:var(--ink-soft);margin:0 0 1.4rem}.bracket:before{content:"「";color:var(--accent);opacity:.55}.bracket:after{content:"」";color:var(--accent);opacity:.55}.hero:before{background:radial-gradient(circle at 28% 45%,color-mix(in srgb,var(--c-teach) 15%,transparent) 0%,transparent 58%),radial-gradient(circle at 72% 50%,color-mix(in srgb,var(--c-learn) 13%,transparent) 0%,transparent 58%)}.hero__grad{background:linear-gradient(100deg,var(--c-teach) 0%,var(--c-learn) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.pattern{position:relative;isolation:isolate}.pattern:after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.055;background-repeat:repeat;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='97' viewBox='0 0 56 97'%3E%3Cg fill='none' stroke='%233b5bdb' stroke-width='1.1'%3E%3Cpath d='M28 0v32.3M28 32.3 0 16.2M28 32.3 56 16.2M0 16.2v32.3M56 16.2v32.3M0 48.5l28 16.2 28-16.2M28 64.7V97M0 48.5 28 32.3l28 16.2M0 80.8l28-16.1 28 16.1M0 16.2 28 0l28 16.2'/%3E%3C/g%3E%3C/svg%3E");background-size:56px 97px}[data-side=learn] .pattern:after,.pattern[data-side=learn]:after{opacity:.07;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='40' viewBox='0 0 80 40'%3E%3Cg fill='none' stroke='%23c86a2a' stroke-width='1.2'%3E%3Cpath d='M0 40a40 40 0 0 1 80 0M0 40a28 28 0 0 1 80 0M0 40a16 16 0 0 1 80 0'/%3E%3Cpath d='M-40 40a40 40 0 0 1 80 0M-40 40a28 28 0 0 1 80 0M-40 40a16 16 0 0 1 80 0'/%3E%3Cpath d='M40 40a40 40 0 0 1 80 0M40 40a28 28 0 0 1 80 0M40 40a16 16 0 0 1 80 0'/%3E%3C/g%3E%3C/svg%3E");background-size:80px 40px}.pattern--fade:after{-webkit-mask-image:linear-gradient(transparent,#000 22%,#000 72%,transparent);mask-image:linear-gradient(transparent,#000 22%,#000 72%,transparent)}body:before{content:"";position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.028;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E")}@media(min-width:860px){.facing__side{position:relative;isolation:isolate}}.pairsw{margin:0 0 2.6rem;view-transition-name:pairsw}.pairsw__cap{font-size:.72rem;font-weight:700;letter-spacing:.12em;color:var(--ink-faint);margin:0 0 .6rem}.pairsw__track{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden}@media(min-width:640px){.pairsw__track{grid-template-columns:1fr 1.35fr}}.pairsw__opt{display:grid;gap:.25rem;align-content:center;padding:.95rem 1.2rem;background:var(--paper-raised);text-decoration:none;color:inherit;position:relative;transition:background-color .25s}.pairsw__opt--on{background:var(--paper-sunk)}.pairsw__opt:before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--c-teach);transform:scaleY(0);transform-origin:50% 0;transition:transform .3s cubic-bezier(.2,.8,.2,1)}.pairsw__opt[data-side=learn]:before{background:var(--c-learn)}.pairsw__opt--on:before{transform:scaleY(1)}a.pairsw__opt:hover{background:var(--accent-wash)}a.pairsw__opt:hover:before{transform:scaleY(1)}.pairsw__who{font-size:.8rem;font-weight:700}.pairsw__opt[data-side=teach] .pairsw__who{color:var(--c-teach-ink)}.pairsw__opt[data-side=learn] .pairsw__who{color:var(--c-learn-ink)}.pairsw__now{font-size:.72rem;color:var(--ink-faint)}.pairsw__title{font-size:.83rem;color:var(--ink-soft);line-height:1.6}@media(prefers-reduced-motion:no-preference){::view-transition-old(root){animation:vt-out .22s cubic-bezier(.4,0,1,1) both}::view-transition-new(root){animation:vt-in .32s cubic-bezier(0,0,.2,1) both}@keyframes vt-out{to{opacity:0;transform:translateY(-6px)}}@keyframes vt-in{0%{opacity:0;transform:translateY(10px)}}}.picker{border:1px solid var(--rule);border-radius:var(--radius);background:var(--paper-raised);box-shadow:var(--shadow-sm);padding:1.4rem 1.5rem;margin:0 0 2em}.picker__q{font-size:.93rem;font-weight:700;margin:0 0 .9rem}.picker__opts{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:.2rem}.picker input{position:absolute;opacity:0;pointer-events:none}.picker label{display:inline-block;cursor:pointer;padding:.45em 1em;border-radius:999px;font-size:.85rem;font-weight:600;border:1px solid var(--rule-strong);color:var(--ink-soft);transition:background-color .18s,color .18s,border-color .18s,transform .18s}.picker label:hover{border-color:var(--accent);color:var(--accent-ink)}.picker input:focus-visible+label{outline:2px solid var(--accent);outline-offset:2px}.picker__out{display:none;margin-top:1.1rem;padding-top:1.1rem;border-top:1px dashed var(--rule-strong);animation:picker-in .3s cubic-bezier(0,0,.2,1) both}@keyframes picker-in{0%{opacity:0;transform:translateY(6px)}}.picker__out p{margin:0;font-size:.93rem;line-height:1.85}.picker__num{display:block;font-size:1.9rem;font-weight:800;letter-spacing:-.02em;color:var(--accent-ink);font-variant-numeric:tabular-nums;margin-bottom:.15rem}.picker:has(#p1:checked) label[for=p1],.picker:has(#p2:checked) label[for=p2],.picker:has(#p3:checked) label[for=p3],.picker:has(#p4:checked) label[for=p4],.picker:has(#p5:checked) label[for=p5]{background:var(--accent);border-color:var(--accent);color:#fff}.picker:has(#p1:checked) #o1,.picker:has(#p2:checked) #o2,.picker:has(#p3:checked) #o3,.picker:has(#p4:checked) #o4,.picker:has(#p5:checked) #o5{display:block}.tool{border:1px solid var(--rule);border-radius:var(--radius);background:var(--paper-raised);box-shadow:var(--shadow-sm);padding:1.5rem 1.6rem;margin:0 0 2em}.tool__q{font-size:.93rem;font-weight:700;margin:0 0 1.1rem}.tool__rows{display:grid;gap:.8rem;margin-bottom:1.2rem}.tool__row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:.8rem}.tool__row label{font-size:.86rem;color:var(--ink-soft)}.tool__row input{width:7.5rem;padding:.5em .7em;text-align:right;font-size:.98rem;font-family:inherit;font-variant-numeric:tabular-nums;color:var(--ink);background:var(--paper);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);transition:border-color .18s,box-shadow .18s}.tool__row input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-wash)}.tool__unit{font-size:.8rem;color:var(--ink-faint);margin-left:.4rem}.tool__res{padding-top:1.1rem;border-top:1px dashed var(--rule-strong)}.tool__label{font-size:.72rem;font-weight:700;letter-spacing:.12em;color:var(--ink-faint)}.tool__num{display:block;font-size:2.2rem;font-weight:800;letter-spacing:-.03em;color:var(--accent-ink);font-variant-numeric:tabular-nums;line-height:1.25}.tool__note{font-size:.8rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}.tool__fallback{font-size:.82rem;color:var(--ink-faint);margin:.8rem 0 0}.pairsw{margin:3.5rem 0 0}