:root{--kb-warm-white:#faf8f3;--kb-paper:#f5f1e8;--kb-oat:#e8e2d6;--kb-stone:#cfc6b8;--kb-mist:#f0ebe3;--kb-ink:#1a1f2e;--kb-ink-soft:#3a4050;--kb-ink-muted:#6b7280;--kb-line:#d9d2c5;--kb-hinoki:#b08968;--kb-hinoki-deep:#8c6a4f;--kb-hinoki-soft:#d4b896;--kb-bg:var(--kb-warm-white);--kb-fg:var(--kb-ink);--kb-accent:var(--kb-hinoki);--kb-radius:2px;--kb-max:68rem;--kb-gutter:clamp(1.25rem, 4vw, 2.5rem);--kb-font-sans:"Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;--kb-font-body:"Segoe UI", "Hiragino Sans", "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;--kb-font-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--kb-ease:cubic-bezier(.22, 1, .36, 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