:root{font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,Helvetica,Arial,Avenir,sans-serif;background:#0f172a;color:#0f172a}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;align-items:stretch;justify-content:center}#root{flex:1;display:flex}.app-shell{margin:0 auto;max-width:800px;width:100%;padding:24px 16px}.card{background:#fff;border-radius:16px;box-shadow:0 18px 40px #0f172a59;padding:20px;display:flex;flex-direction:column;height:calc(100vh - 80px)}.card-header{padding-bottom:12px;border-bottom:1px solid rgba(148,163,184,.4);display:flex;justify-content:space-between;align-items:center}.card-title{font-size:20px;font-weight:700;letter-spacing:.02em}.card-subtitle{font-size:13px;color:#6b7280}.badge{font-size:11px;text-transform:uppercase;letter-spacing:.14em;padding:4px 10px;border-radius:999px;background:#0f172a;color:#f9fafb}.chat-window{flex:1;margin-top:16px;margin-bottom:12px;padding-right:4px;overflow-y:auto}.message{margin-bottom:10px;max-width:80%;line-height:1.4;font-size:14px}.message.user{margin-left:auto;text-align:right}.message.user .bubble{background:#0f172a;color:#f9fafb;border-radius:16px 16px 4px}.message.bot .bubble{background:#e5f2ff;color:#0f172a;border-radius:16px 16px 16px 4px}.bubble{padding:8px 12px;display:inline-block}.message-label{font-size:11px;color:#9ca3af;margin-bottom:2px}.input-row{display:flex;gap:8px;align-items:stretch}.input-row textarea{flex:1;resize:none;min-height:52px;max-height:120px;padding:8px 10px;border-radius:12px;border:1px solid #cbd5e1;font-family:inherit;font-size:14px;outline:none}.input-row textarea:focus{border-color:#0f172a;box-shadow:0 0 0 1px #0f172a4d}.input-row button{border:none;border-radius:999px;padding:0 18px;font-size:14px;font-weight:600;cursor:pointer;background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#f9fafb;display:flex;align-items:center;justify-content:center;transition:transform .08s ease,box-shadow .08s ease,opacity .08s ease}.input-row button:hover{transform:translateY(-1px);box-shadow:0 8px 16px #2563eb66}.input-row button:disabled{opacity:.5;cursor:default;transform:none;box-shadow:none}.status-line{font-size:11px;color:#9ca3af;margin-top:6px}