:root{--accent: 53, 98, 144;--accent-2: 108, 138, 115;--safe-area-top: env(safe-area-inset-top, 0px);--display-font: "Avenir Next", "Avenir", "Helvetica Neue", "Segoe UI", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;--bg: 248, 247, 244;--surface: 255, 255, 252;--text: 53, 39, 33;--muted: 104, 88, 80;--border: 214, 217, 213;--shadow-soft: none;--shadow-lift: none;--shadow: var(--shadow-lift);--radius: .18rem;--radius-sm: .14rem;--space-1: .5rem;--space-2: 1rem;--space-3: 1.5rem;--space-4: 2rem;--space-6: 3rem;--space-8: 4rem;--header-height: 4.85rem;--header-height-compact: 1.875rem;--interactive-min: 2.95rem;--reading-width: 65ch;--text-body-size: 1rem;--text-small-size: .875rem;--heading-1-size: clamp(2.65rem, 5.2vw, 4.35rem);--heading-2-size: clamp(1.7rem, 3vw, 2.2rem);--heading-3-size: clamp(1.25rem, 2vw, 1.5rem);--lh-heading: 1.1;--lh-body: 1.55;--lh-small: 1.3;--content-max-width: 74rem;--gutter: 2rem;--gutter-mobile: 1.5rem;--max-width: var(--content-max-width)}*{box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;overflow-x:hidden;background:rgb(var(--bg))}body{margin:0;padding:0;--header-compact-progress: 0;--header-current-height: calc( var(--header-height) - ((var(--header-height) - var(--header-height-compact)) * var(--header-compact-progress)) );color:rgb(var(--text));background:rgb(var(--bg));font-family:Avenir Next,Avenir,Helvetica Neue,Segoe UI,Hiragino Sans,Yu Gothic,Meiryo,Noto Sans JP,system-ui,-apple-system,sans-serif;font-size:var(--text-body-size);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;word-wrap:break-word;overflow-wrap:break-word;overflow-x:hidden}@media(max-width:767px){body[data-mobile-home-compact-header=true]{--header-compact-progress: 1}}a{color:rgb(var(--text));text-decoration-thickness:.08em;text-underline-offset:.18em}a:hover{color:rgb(var(--accent));text-decoration-thickness:.12em}main.page{width:min(var(--content-max-width),calc(100% - (var(--gutter) * 2)));margin:0 auto;padding:calc(var(--space-3) + var(--header-height) + var(--safe-area-top)) 0 var(--space-8)}body[data-mobile-home-compact-header=true] main.page{padding-top:0}body[data-mobile-home-compact-header=true] .home-intro{margin-top:0}.scroll-progress{position:fixed;top:calc(var(--header-current-height) + var(--safe-area-top));left:0;right:0;height:2px;z-index:49;background:transparent;opacity:0;pointer-events:none;transform:translateZ(0)}body.scroll-progress-enabled .scroll-progress{opacity:1}.scroll-progress__bar{height:100%;width:100%;transform-origin:0 50%;transform:scaleX(var(--scroll-progress, 0));background:linear-gradient(90deg,rgba(var(--accent),.82),rgba(var(--accent-2),.72));transition:transform .12s linear;will-change:transform}h1,h2,h3,h4{margin:0 0 var(--space-1) 0;line-height:var(--lh-heading);letter-spacing:-.015em}h1{font-size:var(--heading-1-size);font-family:var(--display-font);font-weight:620;font-synthesis:none;letter-spacing:-.045em;color:rgb(var(--text));text-wrap:balance}h2{font-size:var(--heading-2-size);font-family:var(--display-font);font-weight:620;font-synthesis:none;letter-spacing:-.03em;color:rgb(var(--text));text-wrap:balance}h3{font-size:var(--heading-3-size);line-height:1.2;font-weight:620}p{margin:0 0 var(--space-2);max-width:var(--reading-width)}small,.small{font-size:var(--text-small-size);line-height:var(--lh-small)}ul,ol{padding-left:1.25rem}img{max-width:100%;height:auto;border-radius:var(--radius-sm)}code{padding:.15rem .35rem;border-radius:.35rem;background:rgba(var(--border),.5);font-size:.95em}pre{padding:1rem 1.1rem;border-radius:var(--radius-sm);background:rgba(var(--border),.35);overflow:auto}pre>code{all:unset}hr{border:none;border-top:1px solid rgb(var(--border));margin:var(--space-4) 0}.muted{color:rgb(var(--muted))}.mt-sm{margin-top:var(--space-1)}.kicker{display:inline-flex;align-items:center;gap:.45rem;padding:0;border:0;border-radius:0;background:transparent;font-size:var(--text-small-size);line-height:var(--lh-small);color:rgb(var(--muted));font-weight:680;letter-spacing:.08em;text-transform:uppercase}.kicker-row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2)}.kicker--status{font-weight:700;color:rgb(var(--text))}.kicker--real{color:#366c4b}.kicker--theoretical{color:#84502b}.hero{padding:var(--space-3) 0 var(--space-6)}.hero+.section{padding-top:var(--space-6)}.hero p{max-width:var(--reading-width);font-size:1.05rem;line-height:1.75;color:rgb(var(--muted))}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;margin-top:1.5rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-1);min-height:2.5rem;padding:.1rem 0;border-radius:0;border:0;border-bottom:1px solid rgba(var(--text),.34);background:transparent;color:rgb(var(--text));text-decoration:none;font-family:inherit;font-size:.96rem;font-weight:680;letter-spacing:0;line-height:1.2;box-shadow:none;cursor:pointer;transition:background .18s ease,color .18s ease,border-color .18s ease}.btn:hover{border-color:rgba(var(--text),.72);color:rgb(var(--text));background:transparent;box-shadow:none}.btn:focus-visible{outline:3px solid rgba(var(--accent),.28);outline-offset:2px}.btn-primary{border-color:rgba(var(--text),.68);color:rgb(var(--text));background:transparent;box-shadow:none}.btn-primary:hover{border-color:rgba(var(--text),.88);background:transparent;color:rgb(var(--text));box-shadow:none}.btn-quiet{background:transparent;color:rgb(var(--text));border-color:rgba(var(--text),.28);box-shadow:none}.btn-quiet:hover{color:rgb(var(--text));background:transparent;border-color:rgba(var(--text),.62);box-shadow:none}.consulting-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-1);min-height:2.35rem;padding:.1rem 0;border:0;border-bottom:1px solid rgba(var(--text),.36);border-radius:0;background:transparent;color:rgb(var(--text));font-size:.96rem;font-weight:560;line-height:1.25;text-decoration:none;box-shadow:none;transition:border-color .18s ease,background-color .18s ease,color .18s ease}.consulting-btn:hover{border-color:rgba(var(--text),.68);background:transparent;color:rgb(var(--text));text-decoration:none}.consulting-btn:focus-visible{outline:3px solid rgba(var(--accent),.22);outline-offset:.25rem}.consulting-btn--primary{border-color:rgba(var(--text),.7);background:transparent;font-weight:620}.section{margin-top:0;padding-top:var(--space-8)}body.reveal-enabled .reveal-on-scroll{opacity:0;transform:translate3d(0,14px,0);transition:opacity .68s cubic-bezier(.22,1,.36,1),transform .68s cubic-bezier(.22,1,.36,1);will-change:opacity,transform}body.reveal-enabled .reveal-on-scroll.is-visible{opacity:1;transform:translateZ(0)}.section>header{display:grid;gap:var(--space-1);margin-bottom:var(--space-3)}.section h2{margin:0}.section .lead{margin:0;max-width:var(--reading-width);color:rgb(var(--muted))}.grid{display:grid;gap:var(--space-3)}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.card{padding:var(--space-3);border-radius:var(--radius);border:0;border-top:1px solid rgba(var(--border),.95);background:transparent;box-shadow:none}.spotlight-target{--spotlight-x: 50%;--spotlight-y: 50%;--spotlight-trail-x: 50%;--spotlight-trail-y: 50%;--spotlight-core-size: 212px;--spotlight-bloom-size: 388px;--spotlight-tail-size: 438px;--spotlight-angle: 0deg;--spotlight-stretch: 1;--spotlight-squash: 1;--spotlight-drift-x: 0px;--spotlight-drift-y: 0px;--spotlight-core-alpha: .062;--spotlight-bloom-alpha: .042;--spotlight-tail-alpha: .03;--spotlight-specular-alpha: .02;--spotlight-blur: 24px;--spotlight-tail-blur: 34px}@media(hover:hover)and (pointer:fine){body.spotlight-enabled .card{transition:transform .18s cubic-bezier(.22,1,.36,1),border-color .18s ease,background-color .18s ease}body.spotlight-enabled .card:hover{transform:translate3d(0,-2px,0);border-color:rgba(var(--text),.28);will-change:transform}body.spotlight-enabled .card:hover{box-shadow:none}body.spotlight-enabled .spotlight-target{position:relative;isolation:isolate;overflow:hidden;will-change:transform}body.spotlight-enabled .spotlight-target>*{position:relative;z-index:1}body.spotlight-enabled .spotlight-target:before,body.spotlight-enabled .spotlight-target:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:0;opacity:0;transition:opacity .22s cubic-bezier(.22,1,.36,1),filter .22s ease,transform .22s ease}body.spotlight-enabled .spotlight-target:before{background:radial-gradient(var(--spotlight-core-size) circle at var(--spotlight-x) var(--spotlight-y),rgba(var(--accent),var(--spotlight-core-alpha)) 0,rgba(var(--accent),calc(var(--spotlight-core-alpha) * .62)) 22%,rgba(var(--accent),calc(var(--spotlight-core-alpha) * .24)) 42%,transparent 70%),radial-gradient(calc(var(--spotlight-bloom-size) * .68) circle at calc(var(--spotlight-x) + var(--spotlight-drift-x)) calc(var(--spotlight-y) + var(--spotlight-drift-y)),rgba(var(--accent-2),var(--spotlight-bloom-alpha)) 0,rgba(var(--accent-2),calc(var(--spotlight-bloom-alpha) * .42)) 38%,transparent 76%),radial-gradient(var(--spotlight-bloom-size) circle at var(--spotlight-x) var(--spotlight-y),rgba(255,255,255,var(--spotlight-specular-alpha)) 0,transparent 72%);filter:blur(var(--spotlight-blur)) saturate(107%);transform-origin:var(--spotlight-x) var(--spotlight-y);transform:rotate(var(--spotlight-angle)) scaleX(var(--spotlight-stretch)) scaleY(var(--spotlight-squash))}body.spotlight-enabled .spotlight-target:after{background:radial-gradient(var(--spotlight-tail-size) circle at var(--spotlight-trail-x) var(--spotlight-trail-y),rgba(var(--accent),var(--spotlight-tail-alpha)) 0,rgba(var(--accent-2),calc(var(--spotlight-tail-alpha) * .64)) 36%,transparent 82%),radial-gradient(calc(var(--spotlight-tail-size) * .58) circle at var(--spotlight-trail-x) var(--spotlight-trail-y),rgba(255,255,255,calc(var(--spotlight-specular-alpha) * .7)) 0,transparent 78%);filter:blur(var(--spotlight-tail-blur));transition-duration:.28s}body.spotlight-enabled .spotlight-target.spotlight-active:before,body.spotlight-enabled .spotlight-target.spotlight-active:after{opacity:1}body.spotlight-enabled .spotlight-target.spotlight-exiting:before,body.spotlight-enabled .spotlight-target.spotlight-exiting:after{opacity:0}}@media(prefers-reduced-motion:reduce){body.spotlight-enabled .card{transition:none!important;transform:none!important}body.spotlight-enabled .spotlight-target:before{display:none!important}body.scroll-progress-enabled .scroll-progress__bar{transition:none!important}}.card-head{display:flex;align-items:flex-start;gap:.75rem;margin-bottom:.5rem}.card-head h3{margin:0}.card-icon{display:block;width:2.5rem;height:2.5rem;flex:0 0 auto;border-radius:0;margin-top:-.25rem}.card-icon--document-pack{margin-top:-.35rem}.card-link:focus-visible,a:focus-visible{outline:3px solid rgba(var(--accent),.28);outline-offset:2px}.card-link{display:block;color:inherit;text-decoration:none}.card-link:hover h3{color:rgb(var(--accent))}.card p{margin:var(--space-1) 0 0;color:rgb(var(--muted))}.card ul{margin:var(--space-2) 0 0;color:rgb(var(--muted))}.notice{border-radius:var(--radius-sm);border:1px solid rgb(var(--border));background:rgba(var(--surface),.95);padding:var(--space-2);margin:var(--space-2) 0 var(--space-3);max-width:var(--reading-width);font-size:var(--text-small-size);line-height:var(--lh-body);color:rgb(var(--muted))}.notice-success{border-color:rgba(var(--accent-2),.45);background:rgba(var(--accent-2),.08)}.notice-error{border-color:#ef444459;background:#ef44440f}.notice.notice--theoretical{border-color:#fdba74;background:#ffedd5;color:#7c2d12}.notice 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.reveal-on-scroll{transform:translate3d(0,12px,0);transition:opacity .72s cubic-bezier(.22,1,.36,1),transform .72s cubic-bezier(.22,1,.36,1)}}.sr-only{border:0;padding:0;margin:0;position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);clip-path:inset(50%);white-space:nowrap}.ja-keep-word{white-space:nowrap}.ja-keep-group{min-width:0}.site-footer[data-astro-cid-sz7xmlte]{border-top:1px solid rgba(var(--border),.9);background:rgb(var(--surface))}.inner[data-astro-cid-sz7xmlte]{width:min(var(--content-max-width),calc(100% - (var(--gutter) * 2)));margin:0 auto;padding:var(--space-8) 0 var(--space-4);display:grid;grid-template-columns:1.2fr 1.6fr 1fr;gap:var(--space-3);align-items:start}.title[data-astro-cid-sz7xmlte]{font-weight:800}.links[data-astro-cid-sz7xmlte]{display:flex;flex-wrap:wrap;gap:var(--space-1) var(--space-2);justify-content:center}.links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:rgb(var(--muted));text-decoration:none;font-weight:700;line-height:var(--lh-small)}.links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:rgb(var(--text));text-decoration:underline;text-decoration-thickness:.08em;text-underline-offset:.18em}.contact[data-astro-cid-sz7xmlte]{text-align:right}.contact[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{text-decoration:none;font-weight:700}.contact[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{text-decoration:underline;text-decoration-thickness:.08em;text-underline-offset:.18em}.fineprint[data-astro-cid-sz7xmlte]{width:min(var(--content-max-width),calc(100% - (var(--gutter) * 2)));margin:0 auto;padding:0 0 var(--space-8);color:rgb(var(--muted));font-size:var(--text-small-size);line-height:var(--lh-small)}@media(max-width:900px){.inner[data-astro-cid-sz7xmlte]{width:min(var(--content-max-width),calc(100% - (var(--gutter-mobile) * 2)));grid-template-columns:1fr;text-align:left}.links[data-astro-cid-sz7xmlte]{justify-content:flex-start}.contact[data-astro-cid-sz7xmlte]{text-align:left}.fineprint[data-astro-cid-sz7xmlte]{width:min(var(--content-max-width),calc(100% - (var(--gutter-mobile) * 2)))}}.site-header[data-astro-cid-3ef6ksr2]{--header-intro: var(--header-intro-progress, 0);--header-brand-gap: calc(.9rem - (.5rem * var(--header-compact-progress)));--header-brand-lockup-gap: calc(.5rem - (.18rem * var(--header-compact-progress)));--header-brand-name-size: calc(1.8rem - (.72rem * var(--header-compact-progress)));--header-brand-local-size: calc(.95rem - (.18rem * var(--header-compact-progress)));--header-brand-subtitle-size: calc(.82rem - (.1rem * var(--header-compact-progress)));--header-nav-link-height: calc(2.95rem - (1.08rem * var(--header-compact-progress)));--header-nav-link-font-size: calc(.98rem - (.16rem * var(--header-compact-progress)));--header-lang-font-size: calc(.88rem - (.14rem * var(--header-compact-progress)));--header-nav-underline-opacity: calc(1 - (.36 * var(--header-compact-progress)));--header-nav-underline-color: rgba( var(--text), calc(.68 - (.26 * var(--header-compact-progress))) );--header-foreground-strong: color-mix( in srgb, rgb(43, 50, 63) calc(var(--header-intro) * 100%), rgb(var(--text)) );--header-foreground-muted: color-mix( in srgb, rgba(80, 91, 112, .86) calc(var(--header-intro) * 100%), rgb(var(--muted)) );position:fixed;top:0;left:0;right:0;height:calc(var(--header-current-height) + var(--safe-area-top));padding-top:var(--safe-area-top);z-index:50;background:rgba(var(--surface),.94);border-bottom:1px solid color-mix(in srgb,rgba(174,190,215,.78) calc(var(--header-intro) * 100%),rgba(var(--border),.88));backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);will-change:height}.site-header[data-astro-cid-3ef6ksr2]:before{content:"";position:absolute;inset:0;z-index:0;background:linear-gradient(180deg,#e2eafaf0,#d3def5e0);opacity:var(--header-intro);pointer-events:none}.nav[data-astro-cid-3ef6ksr2]{width:min(var(--content-max-width),calc(100% - (var(--gutter) * 2)));margin:0 auto;position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:clamp(1rem,1.8vw,2rem);height:var(--header-current-height);padding:0}.nav-row[data-astro-cid-3ef6ksr2]{display:flex;align-items:center}.brand[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:var(--header-brand-gap);text-decoration:none;color:#2b323f;color:var(--header-foreground-strong);flex-shrink:0}.brand-lockup[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:baseline;gap:var(--header-brand-lockup-gap)}.brand-name[data-astro-cid-3ef6ksr2]{font-size:var(--header-brand-name-size);line-height:.92;font-weight:600;letter-spacing:-.04em}.brand-local[data-astro-cid-3ef6ksr2]{font-size:var(--header-brand-local-size);line-height:1;font-weight:500;color:#505b70db;color:color-mix(in srgb,rgba(80,91,112,.86) calc(var(--header-intro) * 100%),rgb(var(--muted)));letter-spacing:.02em;opacity:calc(1 - (.28 * var(--header-compact-progress)))}.brand-subtitle[data-astro-cid-3ef6ksr2]{font-size:var(--header-brand-subtitle-size);line-height:1.2;color:#505b70c7;color:color-mix(in srgb,rgba(80,91,112,.78) calc(var(--header-intro) * 100%),rgb(var(--muted)));white-space:nowrap;letter-spacing:.06em;text-transform:uppercase;max-width:calc(28rem * (1 - var(--header-compact-progress)));overflow:hidden;opacity:calc(1 - var(--header-compact-progress));transform:translateY(calc(-.18rem * var(--header-compact-progress)))}.links[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:clamp(.25rem,1vw,.9rem);flex-wrap:nowrap;justify-content:flex-end}.links[data-astro-cid-3ef6ksr2] .nav-link{position:relative;display:inline-flex;align-items:center;min-height:var(--header-nav-link-height);padding:0 .2rem;text-decoration:none;color:#505b70db;color:var(--header-foreground-muted);font-size:var(--header-nav-link-font-size);font-weight:500;line-height:1.3;letter-spacing:.01em;transition:color .18s ease}.links[data-astro-cid-3ef6ksr2] .nav-link:hover{color:#2b323f;color:var(--header-foreground-strong)}.links[data-astro-cid-3ef6ksr2] .nav-link:after{content:"";position:absolute;left:0;right:0;bottom:calc(.75rem - (.4rem * var(--header-compact-progress)));height:1px;background:var(--header-nav-underline-color);opacity:var(--header-nav-underline-opacity);transform:scaleX(0);transform-origin:center;transition:transform .26s cubic-bezier(.22,1,.36,1),background-color .18s ease,opacity .18s ease}.links[data-astro-cid-3ef6ksr2] .nav-link:hover:after{transform:scaleX(.58)}.links[data-astro-cid-3ef6ksr2] .nav-link.active{color:#2b323f;color:var(--header-foreground-strong)}.links[data-astro-cid-3ef6ksr2] .nav-link.active:after{transform:scaleX(1)}.links[data-astro-cid-3ef6ksr2] .nav-link.nav-link-activating{color:var(--header-foreground-strong)}.links[data-astro-cid-3ef6ksr2] .nav-link.nav-link-activating:after{transform:scaleX(1)}html[data-nav-underline-transition=pending] 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