:root{--ink: #0e1322;--ink-soft: #1e2435;--navy: #14304e;--navy-deep: #0a1c30;--vermilion: #d8421e;--vermilion-deep: #b3331a;--ochre: #b88a2e;--paper: #f6f3ec;--paper-warm: #ede6d5;--paper-deep: #e0d8c4;--rule: #c8c1b1;--rule-soft: #ddd6c5;--muted: #6b6960;--bg: var(--paper);--bg-soft: var(--paper-warm);--text: var(--ink);--text-muted: var(--muted);--border: var(--rule-soft);--orange: var(--vermilion);--orange-dark: var(--vermilion-deep);--orange-deep: var(--vermilion-deep);--accent: var(--vermilion);--font-serif: "Shippori Mincho B1", "Yu Mincho", "YuMincho", "游明朝", "Hiragino Mincho ProN", serif;--font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", monospace;--page-padding: clamp(1.25rem, 4vw, 2.5rem);--container-max: 1200px;--container-narrow: 760px;--ease: cubic-bezier(.22, 1, .36, 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.rule{background:var(--paper);opacity:.35}.display{font-family:var(--font-serif);font-weight:700;font-size:clamp(1.7rem,4.2vw,2.8rem);line-height:1.45;letter-spacing:-.01em;margin:0 0 1rem}.display-xl{font-family:var(--font-serif);font-weight:700;font-size:clamp(2.2rem,6vw,4.2rem);line-height:1.3;letter-spacing:-.02em;margin:0}.btn{display:inline-flex;align-items:center;gap:.7rem;padding:1.1rem 2rem;font-family:var(--font-sans);font-weight:700;font-size:.98rem;letter-spacing:.04em;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:all .25s var(--ease);white-space:nowrap}.btn-primary{background:var(--vermilion);color:var(--paper)!important;border-color:var(--vermilion);box-shadow:4px 4px 0 var(--ink)}.btn-primary:hover{background:var(--vermilion-deep);border-color:var(--vermilion-deep);transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink);color:var(--paper)!important}.btn-ghost{background:transparent;color:var(--ink)!important;border-color:var(--ink)}.btn-ghost:hover{background:var(--ink);color:var(--paper)!important}.btn-light{background:var(--paper);color:var(--ink)!important;border-color:var(--paper)}.btn-light:hover{background:var(--vermilion);color:var(--paper)!important;border-color:var(--vermilion)}.btn .arrow{font-family:var(--font-mono);transition:transform .25s var(--ease)}.btn:hover .arrow{transform:translate(3px)}.eyebrow{display:inline-flex;align-items:center;gap:.7rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--vermilion);font-weight:600;margin:0 0 1.25rem}.eyebrow:before{content:"";width:28px;height:1px;background:currentColor}.center{text-align:center}.muted{color:var(--muted)}.pc-only{display:inline}.sp-only{display:none}@media(max-width:720px){.pc-only{display:none}.sp-only{display:inline}}@media(prefers-reduced-motion:no-preference){.reveal{opacity:0;transform:translateY(14px);animation:rise .9s var(--ease) forwards}.reveal-1{animation-delay:.05s}.reveal-2{animation-delay:.18s}.reveal-3{animation-delay:.32s}.reveal-4{animation-delay:.46s}.reveal-5{animation-delay:.6s}}@keyframes rise{to{opacity:1;transform:none}}code{font-family:var(--font-mono);padding:2px 6px;background:var(--paper-warm);border-radius:2px;font-size:.88em}pre{padding:1.5em;background:var(--ink);color:var(--paper);overflow-x:auto;font-family:var(--font-mono);font-size:.9rem;line-height:1.6}pre>code{all:unset}blockquote{border-left:2px solid var(--vermilion);padding:.25rem 0 .25rem 1.5rem;margin:2rem 0;font-family:var(--font-serif);font-size:1.15rem;color:var(--ink-soft)}hr{border:none;border-top:1px solid var(--rule);margin:3rem 0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.prose h2{margin-top:3rem;font-size:clamp(1.4rem,3vw,1.8rem);padding-bottom:.6rem;border-bottom:1px solid var(--rule)}.prose h3{margin-top:2.5rem;font-size:1.25rem}.prose p{margin-bottom:1.6em}.prose ul,.prose ol{margin-bottom:1.6em;padding-left:1.5rem}.prose li{margin-bottom:.5rem}.prose a{color:var(--vermilion)}