:root{--color-primary:#12263f;--color-accent:#1f7a6c;--color-accent-soft:#eef4f3;--color-accent-strong:#14574d;--color-text:#101720;--color-text-muted:#56606c;--color-link:#12263f;--color-surface:#fff;--color-panel-bg:#f6f7f8;--color-header-bg:#fff;--color-footer-bg:#f6f7f8;--color-border:#e3e6ea;--color-heading-rule:#e3e6ea;--color-code-bg:#f3f5f7;--color-focus:#12263f;--color-on-accent:#fff;--color-bg:var(--color-surface);--color-surface-raised:#fff;--color-surface-muted:var(--color-panel-bg);--color-text-subtle:#79838f;--color-border-subtle:#eef0f3;--color-border-strong:#c9cfd6;--color-overlay:#12181f73;--color-danger:#b42318;--color-danger-soft:#fef3f2;--color-warning:#b54708;--color-warning-soft:#fffaeb;--color-success:#067647;--color-success-soft:#ecfdf3;--color-info:#175cd3;--color-info-soft:#eff8ff;--font-body:system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;--font-heading:var(--font-body);--font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--font-size-xs:.75rem;--font-size-sm:.8125rem;--font-size-md:.9375rem;--font-size-base:1rem;--font-size-body:1.0625rem;--font-size-lg:1.25rem;--font-size-xl:1.625rem;--font-size-2xl:2.125rem;--font-size-3xl:2.75rem;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--line-height-tight:1.35;--line-height-snug:1.5;--line-height-normal:1.7;--line-height-body:1.9;--reading-font-size:1.0625rem;--reading-line-height:2;--reading-paragraph-gap:1.75em;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--space-9:6rem;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-pill:999px;--radius-card:8px;--radius-badge:4px;--shadow-sm:0 1px 2px #12181f0f;--shadow-md:0 4px 16px #12181f1a;--shadow-overlay:0 24px 48px #12181f2e;--layout-max-width:1600px;--layout-sidebar-width:190px;--width-reading:44rem;--width-content:72rem;--duration-fast:.12s;--duration-normal:.18s;--ease:cubic-bezier(.2, 0, .2, 1)}*,:before,:after{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-body);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);line-height:var(--line-height-tight);font-weight:var(--font-weight-bold)}:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:var(--radius-sm)}img,svg,video{max-width:100%}.skip-link{z-index:100;padding:var(--space-2) var(--space-4);background:var(--color-surface);border:2px solid var(--color-focus);border-radius:var(--radius-sm);position:absolute;top:0;left:-9999px}.skip-link:focus{left:var(--space-2);top:var(--space-2)}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}@media (min-width:48rem){:root{--reading-font-size:1.125rem}}