:root{--rw-brand: #0f766e;--rw-ink: #1f2421;--rw-muted: #6b7280;--rw-surface: #fbf9f4;--rw-them: #ece7dd}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--rw-ink);background:var(--rw-surface)}#app{display:flex;flex-direction:column;height:100vh}.rw-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--rw-brand);color:#fff}.rw-title{font-weight:600;font-size:15px}.rw-close{border:0;background:transparent;color:#fff;font-size:22px;line-height:1;cursor:pointer}.rw-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.rw-empty{color:var(--rw-muted);font-size:13px;text-align:center;margin:auto 0}.rw-msg{max-width:80%;padding:8px 12px;border-radius:14px;font-size:14px;line-height:1.4;display:flex;flex-direction:column;gap:2px}.rw-msg--mine{align-self:flex-end;background:var(--rw-brand);color:#fff}.rw-msg--them{align-self:flex-start;background:var(--rw-them);color:var(--rw-ink)}.rw-msg-sender{font-size:11px;font-weight:600;opacity:.7}.rw-composer{display:flex;gap:8px;padding:12px;border-top:1px solid var(--rw-them);background:#fff}.rw-input{flex:1;border:1px solid var(--rw-them);border-radius:10px;padding:8px 12px;font-size:14px;outline:none}.rw-input:focus{border-color:var(--rw-brand)}.rw-send{border:0;background:var(--rw-brand);color:#fff;border-radius:10px;padding:0 16px;font-weight:600;cursor:pointer}.rw-send:disabled{opacity:.5;cursor:default}.rw-prechat{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:20px 16px}.rw-prechat-intro{margin:0 0 4px;color:var(--rw-muted);font-size:13px}.rw-field{display:flex;flex-direction:column;gap:4px}.rw-field-label{font-size:12px;font-weight:600;color:var(--rw-ink)}.rw-prechat .rw-send{margin-top:4px;padding:10px 16px}