:root{--ground: #f5f6f4;--paper: #ffffff;--ink: #1a1e1b;--muted: #6b7570;--rule: #dde2de;--accent: #1f5e4a;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--ground: #101312;--paper: #181c1a;--ink: #e4e8e4;--muted: #8d9893;--rule: #2a302c;--accent: #5fbf9b}}*{box-sizing:border-box}body{margin:0;background:var(--ground);color:var(--ink);font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic,YuGothic,Noto Sans JP,system-ui,sans-serif;line-height:1.7}header{display:flex;align-items:center;gap:1rem;padding:.9rem clamp(1rem,4vw,2.5rem);border-bottom:1px solid var(--rule);background:var(--paper)}.brand{font-weight:700;letter-spacing:.04em}.spacer{flex:1}.email{font-size:.85rem}main{max-width:64rem;margin:0 auto;padding:clamp(1.5rem,5vw,3rem) clamp(1rem,4vw,2.5rem)}main.center{min-height:100dvh;display:grid;place-items:center}.card{background:var(--paper);border:1px solid var(--rule);border-radius:4px;padding:2rem;max-width:28rem}.card h1{margin:0 0 .6rem;font-size:1.25rem}.muted{color:var(--muted)}.tiles{list-style:none;margin:0;padding:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr))}.tiles a{display:flex;flex-direction:column;gap:.35rem;height:100%;padding:1.4rem 1.5rem;background:var(--paper);border:1px solid var(--rule);border-radius:4px;text-decoration:none;color:inherit}.tiles a:hover,.tiles a:focus-visible{border-color:var(--accent)}.tile-name{font-weight:700}.tile-desc{font-size:.87rem;color:var(--muted)}button{font:inherit;padding:.55rem 1.4rem;border:1px solid var(--accent);border-radius:3px;background:var(--accent);color:var(--paper);cursor:pointer}button.link{background:none;border:none;color:var(--accent);padding:.3rem 0;text-decoration:underline}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}