html, body { height: 100%; margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial; background:#fff; }
#dsw { height: 100%; display: flex; flex-direction: column; }
.dsw-header { padding: 12px 14px; border-bottom: 1px solid #eee; font-weight: 650; background:#fff; }
.dsw-messages { flex: 1; padding: 16px; overflow: auto; background: #f6f7fb; }
.dsw-msg { max-width: 82%; padding: 12px 14px; border-radius: 14px; margin: 10px 0; white-space: normal; line-height: 1.35; box-shadow: 0 1px 0 rgba(0,0,0,.04); }
.dsw-user { background: #dbeafe; margin-left: auto; }
.dsw-assistant { background: #fff; border: 1px solid #eee; }
.dsw-form { display: flex; gap: 10px; padding: 12px; border-top: 1px solid #eee; background: #fff; }
.dsw-input { flex: 1; padding: 10px 12px; border: 1px solid #ddd; border-radius: 12px; outline: none; }
.dsw-input:focus { border-color:#bbb; }
.dsw-btn { padding: 10px 14px; border: 1px solid #ddd; border-radius: 12px; background: #111827; color:#fff; cursor: pointer; }
.dsw-btn:hover { opacity:.92; }
.dsw-foot { padding: 8px 12px; font-size: 12px; color: #777; border-top: 1px solid #f3f3f3; background:#fff; }

/* Markdown look */
.dsw-assistant p { margin: 0 0 10px; }
.dsw-assistant p:last-child { margin-bottom: 0; }
.dsw-assistant h1, .dsw-assistant h2, .dsw-assistant h3, .dsw-assistant h4 { margin: 10px 0 8px; line-height: 1.2; }
.dsw-assistant h3 { font-size: 16px; }
.dsw-assistant h4 { font-size: 14px; opacity: .9; }
.dsw-assistant ul, .dsw-assistant ol { margin: 8px 0 8px 18px; padding: 0; }
.dsw-assistant li { margin: 4px 0; }
.dsw-code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 12px; background:#f3f4f6; padding:2px 6px; border-radius:8px; }
.dsw-pre { overflow:auto; background:#0b1020; color:#fff; padding:12px; border-radius:12px; }
.dsw-pre code { color: inherit; }
.dsw-table { width:100%; border-collapse: collapse; margin: 10px 0; font-size: 12px; }
.dsw-table th, .dsw-table td { border: 1px solid #e5e7eb; padding: 6px 8px; vertical-align: top; }
.dsw-table th { background:#f9fafb; text-align:left; }