:root{--color-text:#1b1b1f;--color-muted:#5c5f6b;--color-bg:#f5f6f8;--color-surface:#fff;--color-border:#dcdfe5;--color-accent:#0b6fb4;--color-accent-text:#fff;--radius:12px}*{box-sizing:border-box}html,body{background:var(--color-bg);color:var(--color-text);padding:0;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);margin:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Yu Gothic,Meiryo,sans-serif;line-height:1.7}.screen{max-width:480px;margin:0 auto;padding:16px}.screen__header{align-items:center;gap:8px;padding:8px 0 16px;display:flex}.screen__logo{border-radius:8px;width:32px;height:32px}.screen__title{margin:0;font-size:1.05rem;font-weight:700}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);margin-bottom:12px;padding:16px}.card__heading{margin:0 0 8px;font-size:1rem;font-weight:700}.card__body{color:var(--color-muted);margin:0;font-size:.925rem}.list{color:var(--color-muted);margin:8px 0 0;padding-left:1.25em;font-size:.925rem}.list>li{margin-bottom:4px}.button{border-radius:var(--radius);border:1px solid var(--color-border);background:var(--color-surface);width:100%;color:var(--color-text);cursor:pointer;margin-top:12px;padding:14px 16px;font-family:inherit;font-size:1rem;font-weight:700;display:block}.button--primary{background:var(--color-accent);border-color:var(--color-accent);color:var(--color-accent-text)}.button:disabled{opacity:.6;cursor:default}.notice{border-radius:var(--radius);background:#fff6e5;border:1px solid #f0d9a8;margin:0 0 12px;padding:12px 16px;font-size:.9rem}.notice--error{background:#fdecec;border-color:#f2bcbc}.muted{color:var(--color-muted);font-size:.875rem}