@charset "UTF-8";:root{--brand-indigo: #2b4272;--brand-indigo-deep: #16233d;--brand-vermilion: #be3a25;--brand-washi: #faf8f2;--c-bg: #faf8f2;--c-bg-alt: #f2eee3;--c-surface: #fffdf8;--c-surface-2: #f7f4ea;--c-ink: #16233d;--c-ink-soft: #2b4272;--c-muted: #5c6b86;--c-line: rgba(22, 35, 61, .14);--c-line-strong: rgba(22, 35, 61, .28);--c-accent: #be3a25;--c-accent-ink: #fffdf8;--c-accent-wash: rgba(190, 58, 37, .08);--c-shadow: 22, 35, 61;--font-display: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", Georgia, serif;--font-body: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;--font-mono: "Space Mono", ui-monospace, "Cascadia Mono", Menlo, monospace;--fs-xs: .75rem;--fs-sm: .875rem;--fs-base: 1.0625rem;--fs-lg: clamp(1.125rem, 1.02rem + .42vw, 1.3rem);--fs-xl: clamp(1.35rem, 1.16rem + .78vw, 1.7rem);--fs-2xl: clamp(1.85rem, 1.42rem + 1.8vw, 2.7rem);--fs-3xl: clamp(2.6rem, 1.5rem + 4.6vw, 5.4rem);--sp-section: clamp(4.75rem, 3rem + 7vw, 8.5rem);--rail: 4.5rem;--gutter: clamp(1.5rem, 5vw, 3rem);--container: 1180px;--measure: 62ch;--radius: 3px;--radius-lg: 5px;--ease: cubic-bezier(.22, .61, .36, 1);--dur: .32s;color-scheme:only light}*,*:before,*:after{box-sizing:border-box}*{margin:0}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:5rem}body{position:relative;background:var(--c-bg);color:var(--c-ink);font-family:var(--font-body);font-size:var(--fs-base);line-height:1.7;min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased}body:after{content:"";position:fixed;inset:0;z-index:999;pointer-events:none;opacity:.032;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E")}img,svg{display:block;max-width:100%}h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.02;letter-spacing:-.025em;text-wrap:balance}h1{font-size:var(--fs-3xl);font-weight:900}h2{font-size:var(--fs-2xl)}h3{font-size:var(--fs-xl);line-height:1.15}p{text-wrap:pretty}a{color:inherit;text-underline-offset:.22em;text-decoration-thickness:1px}:where(a,button,[tabindex]):focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}::selection{background:var(--c-accent);color:var(--c-accent-ink)}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}.section{display:block;padding-block:var(--sp-section);position:relative}.section--ruled{border-top:1px solid var(--c-line)}.section--tint{background:var(--c-bg-alt)}@media(min-width:64rem){body{padding-left:var(--rail)}}.marker{display:flex;align-items:center;gap:.9rem;font-family:var(--font-mono);font-size:.7rem;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:var(--c-muted);margin-bottom:1.75rem}.marker__num{color:var(--c-accent)}.marker__rule{width:3.5rem;height:1px;background:var(--c-line-strong)}.marker__kanji{font-family:var(--font-display);font-size:.95rem;letter-spacing:.2em;color:var(--c-accent);opacity:.65}.section-lead{max-width:var(--measure);color:var(--c-muted);font-size:var(--fs-lg);margin-top:1.35rem}.btn{--btn-bg: var(--c-ink);--btn-fg: var(--c-bg);position:relative;display:inline-flex;align-items:center;gap:.7rem;padding:.9rem 1.7rem;background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-bg);border-radius:0;font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;text-decoration:none;cursor:pointer;overflow:hidden;transition:color .26s var(--ease),border-color .26s var(--ease)}.btn:before{content:"";position:absolute;inset:0;background:var(--c-accent);transform:scaleX(0);transform-origin:right;transition:transform .38s var(--ease)}.btn:hover:before{transform:scaleX(1);transform-origin:left}.btn>*{position:relative}.btn:hover{color:var(--c-accent-ink);border-color:var(--c-accent)}.btn--accent{--btn-bg: var(--c-accent);--btn-fg: var(--c-accent-ink)}.btn--accent:before{background:var(--c-ink)}.btn--accent:hover{color:var(--c-bg);border-color:var(--c-ink)}.btn--ghost{--btn-bg: transparent;--btn-fg: var(--c-ink);border-color:var(--c-line-strong)}.btn__arrow{transition:transform .38s var(--ease)}.btn:hover .btn__arrow{transform:translate(4px)}.reveal{opacity:0;transform:translateY(22px);transition:opacity .76s var(--ease),transform .76s var(--ease);transition-delay:var(--reveal-delay, 0ms)}.reveal.is-visible{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link{position:absolute;left:1rem;top:-4rem;z-index:100;padding:.75rem 1.25rem;background:var(--c-accent);color:var(--c-accent-ink);font-family:var(--font-mono);font-size:.75rem;text-decoration:none;transition:top var(--dur) var(--ease)}.skip-link:focus-visible{top:1rem}