:root{--color-ink: #111111;--color-ink-80: #2a2a2a;--color-ink-60: #585858;--color-ink-muted: #888888;--color-coral: #ff8877;--color-deep-blue: #2d63d6;--gradient-brand: linear-gradient(in oklch, var(--color-coral), var(--color-deep-blue));--gradient-brand-h: linear-gradient(to right in oklch, var(--color-coral), var(--color-deep-blue));--gradient-brand-135: linear-gradient(135deg in oklch, var(--color-coral), var(--color-deep-blue));--color-paper: #f8f8f8;--color-surface: #f1f1f1;--color-card: #ffffff;--color-hairline: #dedede;--color-hairline-soft: #ebebeb;--color-on-dark: #f8f8f8;--color-on-dark-dim: #c6c6c6;--color-on-dark-muted: #888888;--color-on-dark-hairline: #2a2a26;--color-on-dark-line: #3a3a36;--font-jp: "Noto Sans JP", sans-serif;--font-en: "Inter", sans-serif;--font-mono: "JetBrains Mono", monospace;--gutter: clamp(24px, 7vw, 96px);--w-wide: 1200px;--w-content: 1080px;--w-reading: 720px;--w-form: 640px;--w-article: 760px;--w-article-wide: 1000px;--header-h: 76px;--maxw: var(--w-wide);--pad-x: var(--gutter);--radius-sm: 2px;--radius: 4px;--radius-lg: 8px;--space-1: 4px;--space-2: 8px;--space-3: 16px;--space-4: 24px;--space-5: 32px;--space-6: 48px;--space-7: 64px;--space-8: 96px;--space-9: 128px}*{box-sizing:border-box}html,body{margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--color-paper);color:var(--color-ink);font-family:var(--font-jp);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}:lang(en) body,[lang=en] body{font-family:var(--font-en)}::selection{background:var(--color-coral);color:var(--color-ink)}a{color:inherit;text-decoration:none}img{max-width:100%}.kn-container{width:calc(100% - 2 * var(--gutter));max-width:var(--w-wide);margin-inline:auto}.kn-container--content{max-width:var(--w-content)}.kn-container--reading{max-width:var(--w-reading)}.kn-container--form{max-width:var(--w-form)}.kn-article{display:grid;grid-template-columns:[full-start] minmax(var(--gutter),1fr) [wide-start] minmax(0,calc((var(--w-article-wide) - var(--w-article)) / 2)) [measure-start] minmax(0,var(--w-article)) [measure-end] minmax(0,calc((var(--w-article-wide) - var(--w-article)) / 2)) [wide-end] minmax(var(--gutter),1fr) [full-end]}.kn-article>*{grid-column:measure;min-width:0}.kn-article>.kn-article-wide{grid-column:wide}@media(max-width:1080px){.kn-article{display:block;width:calc(100% - 2 * var(--gutter));max-width:var(--w-article);margin-inline:auto}}.kn-bleed-shell{display:grid;grid-template-columns:[full-start] minmax(var(--gutter),1fr) [content-start] minmax(0,var(--w-content)) [content-end] minmax(var(--gutter),1fr) [full-end]}.kn-bleed-shell>*{grid-column:content-start / content-end}.kn-bleed-shell>.kn-bleed-full{grid-column:full-start / full-end}.kn-bleed-shell>.kn-bleed-left{grid-column:full-start / content-end}.kn-bleed-shell>.kn-bleed-right{grid-column:content-start / full-end}.kn-eyebrow{font-family:var(--font-en);font-size:13px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--color-ink-60)}.kn-section-h2{font-weight:700;font-size:clamp(26px,3.4vw,36px);line-height:1.45;letter-spacing:-.01em;margin:0 0 28px}[lang=en] .kn-section-h2{font-family:var(--font-en);font-size:clamp(28px,3.6vw,40px);line-height:1.25;letter-spacing:-.02em}.kn-section-lead{font-size:16.5px;line-height:1.95;color:var(--color-ink-80);max-width:680px;margin:0 0 64px}[lang=en] .kn-section-lead{font-family:var(--font-en);font-size:16px;line-height:1.8}.kn-grad-term{background:var(--gradient-brand-h);color:#fff;padding:2px 8px;border-radius:var(--radius-sm);-webkit-box-decoration-break:clone;box-decoration-break:clone;font-weight:500}.kn-link-underline{font-family:var(--font-jp);font-size:15px;font-weight:500;color:var(--color-ink);border-bottom:1.5px solid var(--color-coral);padding-bottom:4px}[lang=en] .kn-link-underline{font-family:var(--font-en)}.kn-btn{display:inline-block;font-family:var(--font-jp);font-size:15px;font-weight:500;padding:13px 26px;border-radius:var(--radius);border:1.5px solid var(--color-ink);transition:background .2s ease,color .2s ease}[lang=en] .kn-btn{font-family:var(--font-en)}.kn-btn--solid{color:var(--color-paper);background:var(--color-ink);padding:13px 28px}.kn-btn--solid:hover{background:#000}.kn-btn--outline{color:var(--color-ink);background:transparent}.kn-btn--outline:hover{background:var(--color-ink);color:var(--color-paper)}.kn-btn svg{transition:transform .25s cubic-bezier(.2,.7,.2,1)}.kn-btn:hover svg{transform:translate(3px)}[data-reveal-ready] [data-reveal]{opacity:0;transform:translateY(18px)}[data-reveal-ready] [data-reveal].kn-in{opacity:1;transform:none;transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}.kn-loop-path{stroke-dasharray:1;stroke-dashoffset:1}[data-reveal-ready] .kn-loop-path{transition:stroke-dashoffset 2s ease}.kn-loop-path.kn-draw{stroke-dashoffset:0}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}[data-reveal-ready] [data-reveal]{opacity:1!important;transform:none!important;transition:none!important}.kn-loop-path{stroke-dashoffset:0!important}}.kn-header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--color-paper) 82%,transparent);backdrop-filter:saturate(160%) blur(10px);-webkit-backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--color-hairline)}.kn-header__inner[data-astro-cid-3ef6ksr2]{padding-block:15px;display:flex;align-items:center;justify-content:space-between;gap:24px}.kn-header__logo[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;transition:opacity .2s ease}.kn-header__logo[data-astro-cid-3ef6ksr2]:hover{opacity:.75}.kn-header__logo[data-astro-cid-3ef6ksr2] img[data-astro-cid-3ef6ksr2]{height:28px;width:auto;display:block}.kn-header__nav[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:clamp(18px,2.6vw,36px)}.kn-nav-links[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:clamp(16px,2.2vw,30px);font-family:var(--font-en);font-size:13px;font-weight:500;letter-spacing:.02em;color:#2a2a2a}.kn-nav-links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{padding-bottom:3px;background-image:linear-gradient(var(--color-ink),var(--color-ink));background-repeat:no-repeat;background-size:0% 1px;background-position:left bottom;transition:background-size .25s cubic-bezier(.2,.7,.2,1),color .2s ease}.kn-nav-links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{color:var(--color-ink);background-size:100% 1px}[lang=ja] .kn-nav-links[data-astro-cid-3ef6ksr2]{font-family:var(--font-jp)}[lang=ja] .kn-mobile-menu__nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{font-family:var(--font-jp);letter-spacing:0}[lang=ja] .kn-header__contact[data-astro-cid-3ef6ksr2],[lang=ja] .kn-mobile-menu__contact[data-astro-cid-3ef6ksr2]{font-family:var(--font-jp)}.kn-header__contact[data-astro-cid-3ef6ksr2]{font-family:var(--font-en);font-size:13px;font-weight:500;color:var(--color-ink);border:1.5px solid var(--color-ink);padding:8px 18px;border-radius:var(--radius);transition:background .2s ease,color .2s ease}.kn-header__contact[data-astro-cid-3ef6ksr2]:hover{background:var(--color-ink);color:var(--color-paper)}.kn-lang[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:7px;font-family:var(--font-en);font-size:12px;letter-spacing:.04em}.kn-lang__btn[data-astro-cid-3ef6ksr2]{padding:2px;color:var(--color-ink-muted);font-weight:400;transition:color .2s ease}.kn-lang__btn[data-astro-cid-3ef6ksr2]:not(.is-active):hover{color:var(--color-ink)}.kn-lang__btn[data-astro-cid-3ef6ksr2].is-active{color:var(--color-ink);font-weight:700}.kn-lang__sep[data-astro-cid-3ef6ksr2]{color:#c6c6c6}.kn-hamburger[data-astro-cid-3ef6ksr2]{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;margin-right:-8px;padding:0;background:none;border:none;cursor:pointer}.kn-hamburger[data-astro-cid-3ef6ksr2] span[data-astro-cid-3ef6ksr2]{display:block;width:22px;height:2px;background:var(--color-ink);border-radius:2px;transition:transform .28s cubic-bezier(.2,.7,.2,1),opacity .18s ease}.kn-hamburger[data-astro-cid-3ef6ksr2][aria-expanded=true] span[data-astro-cid-3ef6ksr2]:nth-child(1){transform:translateY(7px) rotate(45deg)}.kn-hamburger[data-astro-cid-3ef6ksr2][aria-expanded=true] span[data-astro-cid-3ef6ksr2]:nth-child(2){opacity:0}.kn-hamburger[data-astro-cid-3ef6ksr2][aria-expanded=true] span[data-astro-cid-3ef6ksr2]:nth-child(3){transform:translateY(-7px) rotate(-45deg)}@media(max-width:860px){.kn-nav-links[data-astro-cid-3ef6ksr2],.kn-header__contact[data-astro-cid-3ef6ksr2],.kn-header__nav[data-astro-cid-3ef6ksr2]>.kn-lang[data-astro-cid-3ef6ksr2]{display:none}.kn-hamburger[data-astro-cid-3ef6ksr2]{display:flex}}.kn-mobile-menu[data-astro-cid-3ef6ksr2]{position:fixed;inset:0;z-index:50;opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease}.kn-mobile-menu[data-astro-cid-3ef6ksr2].is-open{opacity:1;visibility:visible}.kn-mobile-menu__panel[data-astro-cid-3ef6ksr2]{position:absolute;inset:0;background:var(--color-paper);display:flex;flex-direction:column;padding:calc(var(--header-h) + 12px) var(--gutter) 44px;overflow-y:auto;transform:translateY(-10px);transition:transform .28s cubic-bezier(.2,.7,.2,1)}.kn-mobile-menu[data-astro-cid-3ef6ksr2].is-open .kn-mobile-menu__panel[data-astro-cid-3ef6ksr2]{transform:none}.kn-mobile-menu__nav[data-astro-cid-3ef6ksr2]{display:flex;flex-direction:column}.kn-mobile-menu__nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{font-family:var(--font-en);font-size:16px;font-weight:500;letter-spacing:-.01em;color:var(--color-ink);padding:20px 2px;border-bottom:1px solid var(--color-hairline)}.kn-mobile-menu__contact[data-astro-cid-3ef6ksr2]{font-family:var(--font-en);font-size:16px;font-weight:500;color:var(--color-paper);background:var(--color-ink);border-radius:var(--radius);padding:15px 24px;text-align:center;margin-top:28px;transition:background .2s ease}.kn-mobile-menu__contact[data-astro-cid-3ef6ksr2]:hover{background:#000}.kn-mobile-menu__lang[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:32px;font-family:var(--font-en);font-size:14px}@media(prefers-reduced-motion:reduce){.kn-mobile-menu[data-astro-cid-3ef6ksr2],.kn-mobile-menu__panel[data-astro-cid-3ef6ksr2],.kn-hamburger[data-astro-cid-3ef6ksr2] span[data-astro-cid-3ef6ksr2]{transition:none}.kn-mobile-menu__panel[data-astro-cid-3ef6ksr2]{transform:none}}.kn-footer[data-astro-cid-sz7xmlte]{background:var(--color-ink);color:var(--color-on-dark);padding-block:clamp(56px,7vw,88px)}.kn-footer__top[data-astro-cid-sz7xmlte]{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap;margin-bottom:56px}.kn-footer__logo[data-astro-cid-sz7xmlte]{height:28px;width:auto;display:block;margin-bottom:22px}.kn-footer__blurb[data-astro-cid-sz7xmlte]{font-size:13.5px;color:var(--color-on-dark-muted);line-height:1.9}[lang=en] .kn-footer__blurb[data-astro-cid-sz7xmlte]{font-family:var(--font-en)}.kn-footer__right[data-astro-cid-sz7xmlte]{display:flex;flex-direction:column;align-items:flex-end;gap:16px}.kn-footer__nav[data-astro-cid-sz7xmlte]{display:flex;gap:22px;font-family:var(--font-en);font-size:13px;color:var(--color-on-dark-dim);flex-wrap:wrap;justify-content:flex-end}[lang=ja] .kn-footer__nav[data-astro-cid-sz7xmlte]{font-family:var(--font-jp)}.kn-footer__nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{padding-bottom:3px;background-image:linear-gradient(currentColor,currentColor);background-repeat:no-repeat;background-size:0% 1px;background-position:left bottom;transition:background-size .25s cubic-bezier(.2,.7,.2,1),color .2s ease}.kn-footer__nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--color-on-dark);background-size:100% 1px}.kn-footer__bar[data-astro-cid-sz7xmlte]{width:92px;height:3px;background:var(--gradient-brand-h);border-radius:var(--radius-sm);display:block;margin-top:6px}.kn-footer__tagline[data-astro-cid-sz7xmlte]{font-family:var(--font-en);font-size:12px;color:#6b6b6b;letter-spacing:.06em}.kn-footer__bottom[data-astro-cid-sz7xmlte]{border-top:1px solid var(--color-on-dark-hairline);padding-top:24px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.kn-footer__copy[data-astro-cid-sz7xmlte]{font-family:var(--font-en);font-size:12px;color:#6b6b6b}.kn-footer__lang[data-astro-cid-sz7xmlte]{display:flex;align-items:center;gap:7px;font-family:var(--font-en);font-size:12px}.kn-footer__langbtn[data-astro-cid-sz7xmlte]{color:#6b6b6b;transition:color .2s ease}.kn-footer__langbtn[data-astro-cid-sz7xmlte]:not(.is-active):hover{color:var(--color-on-dark)}.kn-footer__langbtn[data-astro-cid-sz7xmlte].is-active{color:var(--color-on-dark);font-weight:700}.kn-footer__langsep[data-astro-cid-sz7xmlte]{color:var(--color-on-dark-line)}@media(max-width:680px){.kn-footer__right[data-astro-cid-sz7xmlte]{align-items:flex-start}.kn-footer__nav[data-astro-cid-sz7xmlte]{justify-content:flex-start}}