:root{--color-brand-50:#f0f6fc;--color-brand-100:#d9e9f7;--color-brand-200:#b3d3ee;--color-brand-300:#80b4e0;--color-brand-400:#4a93cf;--color-brand-500:#1d6cc1;--color-brand-600:#155da6;--color-brand-700:#114a83;--color-brand-800:#0e3d6d;--color-brand-900:#0c3258;--color-neutral-0:#fff;--color-neutral-50:#fafbfc;--color-neutral-100:#f3f5f8;--color-neutral-200:#e6e9ef;--color-neutral-300:#d2d7e0;--color-neutral-400:#9aa3b0;--color-neutral-500:#6b7383;--color-neutral-600:#4f5664;--color-neutral-700:#353c4a;--color-neutral-800:#1f2532;--color-neutral-900:#0e131c;--color-accent-50:#fdf6ed;--color-accent-100:#f9e6cb;--color-accent-300:#e9b87e;--color-accent-500:#c87b34;--color-accent-600:#b6602a;--color-accent-700:#964d22;--color-success:#0a8a5f;--color-warning:#d68a23;--color-error:#c8402a;--color-info:var(--color-brand-500);--color-bg-base:var(--color-neutral-0);--color-bg-elevated:var(--color-neutral-0);--color-bg-sunken:var(--color-neutral-50);--color-bg-inverse:var(--color-neutral-900);--color-fg-primary:var(--color-neutral-800);--color-fg-secondary:var(--color-neutral-600);--color-fg-muted:var(--color-neutral-500);--color-fg-inverse:var(--color-neutral-0);--color-fg-brand:var(--color-brand-600);--color-fg-link:var(--color-brand-700);--color-border-subtle:var(--color-neutral-200);--color-border-default:var(--color-neutral-300);--color-border-strong:var(--color-neutral-400);--color-border-brand:var(--color-brand-500);--color-border-focus:var(--color-brand-500);--font-sans-jp:'Noto Sans JP','Hiragino Sans','Yu Gothic','Meiryo',sans-serif;--font-sans-en:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;--font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',monospace;--fs-xs:12px;--fs-sm:14px;--fs-md:16px;--fs-lg:17px;--fs-xl:18px;--fs-2xl:22px;--fs-3xl:28px;--fs-4xl:32px;--fs-5xl:40px;--fs-6xl:48px;--lh-tight:1.25;--lh-snug:1.4;--lh-normal:1.6;--lh-relaxed:1.75;--lh-loose:1.9;--tracking-tight:-.01em;--tracking-normal:0;--tracking-wide:.04em;--tracking-wider:.08em;--fw-regular:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--fw-extrabold:800;--space-0:0;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-20:80px;--space-24:96px;--space-32:128px;--section-y-dense:var(--space-16);--section-y-default:var(--space-24);--section-y-spacious:var(--space-32);--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--radius-full:9999px;--shadow-sm:0 1px 2px rgba(14,19,28,.04),0 1px 3px rgba(14,19,28,.06);--shadow-md:0 4px 12px rgba(14,19,28,.08),0 2px 4px rgba(14,19,28,.04);--shadow-lg:0 12px 32px rgba(14,19,28,.12),0 4px 8px rgba(14,19,28,.06);--shadow-hero:0 24px 64px rgba(14,19,28,.1),0 8px 16px rgba(14,19,28,.06);--shadow-ring-focus:0 0 0 3px rgba(29,108,193,.25);--duration-instant:80ms;--duration-fast:.12s;--duration-base:.2s;--duration-slow:.32s;--duration-deliberate:.48s;--easing-standard:cubic-bezier(.2,0,0,1);--easing-decelerate:cubic-bezier(0,0,.2,1);--easing-accelerate:cubic-bezier(.4,0,1,1);--easing-spring:cubic-bezier(.34,1.56,.64,1);--z-base:0;--z-raised:10;--z-sticky:100;--z-modal:1000;--z-toast:1100;--z-tooltip:1200;--container-max:1280px;--container-prose:720px}[data-theme=dark]{--color-bg-base:var(--color-neutral-900);--color-bg-elevated:var(--color-neutral-800);--color-bg-sunken:#0a0e15;--color-fg-primary:var(--color-neutral-100);--color-fg-secondary:var(--color-neutral-300);--color-fg-muted:var(--color-neutral-400);--color-fg-brand:var(--color-brand-300);--color-border-subtle:rgba(255,255,255,.08);--color-border-default:rgba(255,255,255,.14)}@media (prefers-reduced-motion:reduce){:root{--duration-instant:0ms;--duration-fast:0ms;--duration-base:0ms;--duration-slow:0ms;--duration-deliberate:0ms}}