:root{--primary:#2e9e68;--primary-dark:#1f7a4f;--primary-light:#e6f5ee;--bg:#f3f4f6;--surface:#fff;--surface2:#f9fafb;--border:#e5e7eb;--text:#111827;--text-secondary:#6b7280;--text-inverse:#fff;--bubble-mine:#2e9e68;--bubble-theirs:#fff;--danger:#ef4444;--success:#10b981;--shadow-sm:0 1px 3px #00000014;--shadow:0 4px 12px #0000001a;--radius:12px;--radius-sm:8px;--header-h:56px;--input-area-h:72px;font-family:Hiragino Sans,Noto Sans JP,Yu Gothic,system-ui,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--surface:#1c1e26;--surface2:#252830;--border:#2e3040;--text:#f1f3f5;--text-secondary:#9ca3af;--bubble-theirs:#2e3040}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{overscroll-behavior:none;height:100%}body{background:var(--bg);min-height:100%;color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none;font-size:15px;line-height:1.5}#root{flex-direction:column;min-height:100vh;display:flex}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit;font-size:inherit;background:0 0;border:none}input,textarea{font-family:inherit;font-size:inherit}ul{list-style:none}.btn{border-radius:var(--radius-sm);white-space:nowrap;justify-content:center;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:opacity .15s,transform 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