.user-message{padding:1rem;margin-bottom:1rem;border:1px solid transparent;border-radius:.25rem}.user-message-success{color:#155724;background-color:#d4edda;border-color:#c3e6cb}.user-message-error{color:#721c24;background-color:#f8d7da;border-color:#f5c6cb}.user-message-info{color:#0c5460;background-color:#d1ecf1;border-color:#bee5eb}.user-message ul{margin:0;padding-left:1.2rem}:root{--bg: #f6f7fb;--card: #ffffff;--text: #0b0f19;--inputtext: #0b0f19;--muted: #374151;--accent: #1e40af;--accent-600: #1d4ed8;--ring: rgba(29, 78, 216, .28);--line: #cbd5e1}@media (prefers-color-scheme: dark){:root{--bg: #0b1220;--card: #0f172a;--text: #e5e7eb;--inputtext: #0b0f19;--muted: #cbd5e1;--accent: #3b82f6;--accent-600: #2563eb;--ring: rgba(59, 130, 246, .35);--line: #334155}}*{box-sizing:border-box}body{margin:0 0 20px;background:var(--bg);color:var(--text);font-family:Noto Sans JP,system-ui,-apple-system,Segoe 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