:root{--bg:#f4f6f9;--surface:#fff;--text:#1c2430;--muted:#4a5568;--accent:#2f4f7f;--accent-text:#fff;--border:#c9d2de;--focus:#1a56b8;--danger-bg:#fff4f2;--danger-border:#b4442f;color:var(--text);background:var(--bg);font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,system-ui,sans-serif;font-size:16px;line-height:1.7}*{box-sizing:border-box}body{min-height:100vh;margin:0}h1{margin:0 0 1rem;font-size:1.75rem;line-height:1.4}p{margin:0 0 1rem}.page{flex-direction:column;min-height:100vh;display:flex}.center{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:2rem 1rem;display:flex}.topbar{justify-content:flex-end;padding:.75rem 1rem;display:flex}.bilingual{flex-direction:column;gap:.25rem;display:flex}.bilingual span[lang=en]{color:var(--muted);font-size:1.25rem;font-weight:500}.lang-choices{flex-wrap:wrap;justify-content:center;gap:1.5rem;margin-top:1rem;display:flex}button{font:inherit;cursor:pointer}button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.big-button{min-width:12rem;min-height:4.5rem;color:var(--accent-text);background:var(--accent);border:none;border-radius:.75rem;padding:1rem 2rem;font-size:1.375rem;font-weight:600}.big-button:hover{filter:brightness(1.12)}.lang-switcher{gap:.5rem;display:flex}.small-button{min-width:44px;min-height:44px;color:var(--accent);background:var(--surface);border:1px solid var(--border);border-radius:.5rem;padding:.5rem 1rem}.small-button[aria-pressed=true]{color:var(--accent-text);background:var(--accent);border-color:var(--accent);font-weight:600}.config-error{max-width:48rem;margin:0 auto;padding:2rem 1rem}.config-error section{margin-bottom:1rem}.error-list{background:var(--danger-bg);border:2px solid var(--danger-border);border-radius:.5rem;padding:1rem 1rem 1rem 2rem;font-family:ui-monospace,Menlo,monospace}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}