.app{max-width:36rem;margin:0 auto;padding:2rem 1rem 4rem}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:1.75rem;font-weight:600;margin:0 0 .25rem;letter-spacing:-.02em}.subtitle{margin:0;color:var(--muted);font-size:.95rem}.form{display:flex;flex-direction:column;gap:.75rem;margin-bottom:2.5rem;padding:1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:12px}.input{width:100%;padding:.65rem .85rem;font:inherit;font-size:.95rem;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;outline:none;transition:border-color .15s}.input:focus{border-color:var(--accent)}.input::placeholder{color:var(--muted)}.textarea{resize:vertical;min-height:4rem}.form-error{margin:0;font-size:.875rem;color:#f87171}.btn{padding:.65rem 1.25rem;font:inherit;font-size:.95rem;font-weight:500;color:var(--bg);background:var(--accent);border:none;border-radius:8px;cursor:pointer;transition:background .15s}.btn:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{opacity:.7;cursor:not-allowed}.list{min-height:6rem}.muted{color:var(--muted);text-align:center;margin:2rem 0}.error{color:#f87171;text-align:center;margin:2rem 0}.messages{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1rem}.message{padding:1rem 1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:10px}.message-content{margin:0 0 .5rem;white-space:pre-wrap;word-break:break-word}.message-meta{margin:0;font-size:.8rem;color:var(--muted);display:flex;align-items:center;gap:.75rem}.message-author{font-weight:500;color:var(--accent)}.message-time{color:var(--muted)}:root{--bg: #0f0f12;--surface: #18181c;--border: #2a2a30;--text: #e4e4e7;--muted: #71717a;--accent: #a78bfa;--accent-hover: #c4b5fd}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:DM Sans,system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}#root{min-height:100vh}