:root{--font-size-xs:0.75rem;--font-size-sm:0.875rem;--font-size-md:1rem;--font-size-lg:1.125rem;--font-size-xl:1.5rem;--space-xs:0.4rem;--space-sm:0.8rem;--space-md:1.2rem;--space-lg:1.6rem;--space-xl:2rem;--transition-time-sm:0.25s;--transition-time-base:0.5s;--color-bg-default:#fafaf8;--color-bg-muted:#f0f0ef;--color-bg-surface:#ffffff;--color-shadow:#c8c6c1;--color-shadow-hover:rgba(150,150,150,0.5);--color-text-primary:#444;--color-text-secondary:#666;--color-accent:#d8aa00;--color-accent-transparent:rgba(216,170,0,0.5);--color-accent-hover:#f76b1c;--color-border-default:#ddd;--color-accent-bg:#f9e29c;--color-sunmoon-icon:#40e0d0;--shadow-light:0 2px 4px rgba(0,0,0,0.08);--shadow-hover:0 4px 8px rgba(0,0,0,0.15)}[data-theme=dark]{--color-bg-default:#171716;--color-bg-muted:#2d2d2c;--color-bg-surface:#131210;--color-shadow:#707070;--color-shadow-hover:rgba(100,100,100,0.5);--color-text-primary:#bfbfbf;--color-text-secondary:#949494;--color-accent:#b18c06;--color-accent-transparent:rgba(177,140,6,0.5);--color-accent-hover:#f76b1c;--color-border-default:#333;--color-accent-bg:#6c5509;--color-sunmoon-icon:#facc15;--shadow-light:0 2px 4px rgba(255,255,255,0.08);--shadow-hover:0 4px 8px rgba(255,255,255,0.3)}html{font-size:14px;scroll-behavior:smooth}body{font-family:IBM Plex Sans JP,sans-serif;margin:0;background:var(--color-bg-default);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{display:flex;flex-direction:column;min-height:100vh}.career__timeline-event,.certification-skill__category,.profile-page,.profile-page__wide-section,.research__card,body{transition:background-color var(--transition-time-base) ease,color var(--transition-time-base) ease,border-color var(--transition-time-base) ease}h2,h3,h4{color:var(--color-text-primary);margin-bottom:var(--space-xs);padding-bottom:.25rem;transition:color var(--transition-time-base) ease}h3{font-size:var(--font-size-lg)}h4{font-size:var(--font-size-md)}a{color:var(--color-accent);text-decoration:underline}a:hover{color:var(--color-accent-hover)}.marker{background:repeating-linear-gradient(-45deg,var(--color-accent-transparent) 0,var(--color-accent-transparent) 2px,transparent 2px,transparent 4px);background-position:0 85%;background-size:100% 30%;background-repeat:no-repeat}.sec-en{font-size:var(--font-size-xl);margin-right:var(--space-sm);color:var(--color-text-primary)}.sec-ja{font-size:var(--font-size-md);color:var(--color-text-secondary)}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.profile-page{display:flex;flex-wrap:wrap;max-width:75rem;margin:var(--space-xl) auto;padding:0;box-sizing:border-box;box-shadow:var(--shadow-light);scroll-margin-top:5rem}@media (max-width:750px){.profile-page{margin:var(--space-xl) auto;padding:0}}section{scroll-margin-top:5rem}.profile-page__section,.profile-page__wide-section{padding:var(--space-md) var(--space-lg);box-sizing:border-box}.profile-page__wide-section{width:100%;scroll-margin-top:3rem;border-top:1px solid var(--color-border-default);background-color:var(--color-bg-surface);overflow-x:hidden}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--color-bg-default);border-radius:8px}::-webkit-scrollbar-thumb{background-color:var(--color-accent);border-radius:10px;border:1px solid transparent;background-clip:content-box}::-webkit-scrollbar-thumb:hover{background-color:var(--color-accent-hover)}