.mitm-shell{max-width:980px;margin:30px auto;background:#fff;border:1px solid #e5e7eb;border-radius:22px;box-shadow:0 18px 45px rgba(15,23,42,.12);overflow:hidden;font-family:Arial,Helvetica,sans-serif;color:#111827}.mitm-topbar{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:22px 24px;background:linear-gradient(135deg,#0f172a,#334155);color:#fff}.mitm-title{font-size:26px;font-weight:800;letter-spacing:.2px}.mitm-subtitle{font-size:14px;opacity:.88;margin-top:4px}.mitm-clear,.mitm-upload,.mitm-send{border:0;border-radius:12px;font-weight:700;cursor:pointer}.mitm-clear{background:rgba(255,255,255,.14);color:#fff;padding:10px 14px}.mitm-dropzone{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 20px;border-bottom:1px solid #e5e7eb;background:#f8fafc}.mitm-file{display:none}.mitm-upload{background:#111827;color:#fff;padding:11px 15px}.mitm-file-help{font-size:13px;color:#64748b}.mitm-files{padding:0 20px;background:#f8fafc}.mitm-file-pill{display:inline-flex;align-items:center;gap:8px;margin:10px 8px 0 0;padding:8px 10px;border-radius:999px;background:#e2e8f0;color:#334155;font-size:13px}.mitm-file-pill button{border:0;background:transparent;cursor:pointer;font-weight:800;color:#475569}.mitm-messages{height:560px;overflow-y:auto;padding:22px;background:#f1f5f9}.mitm-bubble{max-width:84%;margin:0 0 16px;padding:15px 17px;border-radius:17px;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere}.mitm-question{margin-left:auto;background:#dbeafe;color:#0f172a}.mitm-answer{margin-right:auto;background:#fff;border:1px solid #e2e8f0;color:#111827}.mitm-thinking{opacity:.75}.mitm-form{display:flex;gap:12px;align-items:flex-end;padding:16px 20px;background:#fff;border-top:1px solid #e5e7eb}.mitm-input{flex:1;min-height:58px;max-height:220px;resize:vertical;border:1px solid #cbd5e1;border-radius:14px;padding:14px 15px;font-size:16px;line-height:1.45}.mitm-input:focus{outline:2px solid #93c5fd;border-color:#60a5fa}.mitm-send{background:#111827;color:#fff;padding:16px 24px;font-size:16px}.mitm-send:disabled{opacity:.6;cursor:not-allowed}@media(max-width:700px){.mitm-shell{margin:12px;border-radius:16px}.mitm-topbar{padding:18px}.mitm-title{font-size:22px}.mitm-messages{height:65vh;padding:16px}.mitm-bubble{max-width:94%}.mitm-form{flex-direction:column;align-items:stretch}.mitm-send{width:100%}}