*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:#f5f5f5;min-height:100vh;display:flex;justify-content:center;align-items:center;padding:1rem}#app{width:100%;max-width:600px}.chat-container{background:#fff;border-radius:12px;box-shadow:0 2px 10px #0000001a;overflow:hidden;display:flex;flex-direction:column;height:80vh;max-height:700px}.chat-header{background:#4f46e5;color:#fff;padding:1rem;text-align:center}.chat-header h1{font-size:1.25rem;font-weight:600}.messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.75rem}.message{max-width:80%;padding:.75rem 1rem;border-radius:12px;position:relative;animation:message-enter .25s ease-out}@keyframes message-enter{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes message-sent-pulse{0%{box-shadow:0 0 #4f46e566}50%{box-shadow:0 0 0 8px #4f46e500}to{box-shadow:0 0 #4f46e500}}.message.user.sent-confirmation{animation:message-enter .25s ease-out,message-sent-pulse .4s ease-out .25s}.message .sent-checkmark{position:absolute;bottom:6px;right:8px;width:14px;height:14px;opacity:0;animation:checkmark-appear .3s ease-out .35s forwards}.message .sent-checkmark svg{width:100%;height:100%;stroke:#fffc;stroke-width:2.5;fill:none}@keyframes checkmark-appear{0%{opacity:0;transform:scale(.5)}60%{opacity:1;transform:scale(1.2)}to{opacity:1;transform:scale(1)}}.message p{margin-bottom:.25rem;line-height:1.4}.message .timestamp{font-size:.7rem;color:#888}.message.user{align-self:flex-end;background:#4f46e5;color:#fff}.message.user .timestamp{color:#ffffffb3}.message.bot{align-self:flex-start;background:#e5e7eb;color:#1f2937}.chat-form{display:flex;padding:1rem;gap:.5rem;border-top:1px solid #e5e7eb}.chat-form input{flex:1;padding:.75rem 1rem;border:2px solid #d1d5db;border-radius:8px;font-size:1rem;transition:border-color .2s,box-shadow .2s}.chat-form input:focus{border-color:#4f46e5;outline:3px solid #312e81;outline-offset:2px;box-shadow:0 0 0 1px #fff}.chat-form input:focus-visible{border-color:#4f46e5;outline:3px solid #312e81;outline-offset:2px;box-shadow:0 0 0 1px #fff}.chat-form button{padding:.75rem 1.5rem;background:#4f46e5;color:#fff;border:2px solid transparent;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s,border-color .2s,box-shadow .2s}.chat-form button:hover{background:#4338ca}.chat-form button:active{background:#3730a3}.chat-form button:focus{outline:3px solid #1e1b4b;outline-offset:2px;box-shadow:0 0 0 1px #fff,0 0 0 5px #1e1b4b4d}.chat-form button:focus-visible{outline:3px solid #1e1b4b;outline-offset:2px;box-shadow:0 0 0 1px #fff,0 0 0 5px #1e1b4b4d}.chat-form input:disabled{background-color:#e5e7eb;color:#9ca3af;cursor:not-allowed;opacity:.7}.chat-form button:disabled{background-color:#9ca3af;cursor:not-allowed;opacity:.7}.chat-form button:disabled:hover{background-color:#9ca3af}.typing-indicator{display:flex;align-items:center;gap:4px;padding:.75rem 1rem}.typing-indicator .dot{width:8px;height:8px;background:#6b7280;border-radius:50%;animation:typing-bounce 1.4s ease-in-out infinite}.typing-indicator .dot:nth-child(1){animation-delay:0s}.typing-indicator .dot:nth-child(2){animation-delay:.2s}.typing-indicator .dot:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-4px)}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.error-banner{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;background:#fef2f2;border-bottom:1px solid #fecaca;color:#991b1b;font-size:.875rem}.error-banner[hidden]{display:none}.error-banner span{flex:1}.error-dismiss{background:none;border:none;color:#991b1b;font-size:1.25rem;cursor:pointer;padding:.25rem .5rem;line-height:1;opacity:.7;transition:opacity .2s,box-shadow .2s;border-radius:4px}.error-dismiss:hover{opacity:1}.error-dismiss:focus{opacity:1;outline:3px solid #7f1d1d;outline-offset:2px;box-shadow:0 0 0 1px #fef2f2}.error-dismiss:focus-visible{opacity:1;outline:3px solid #7f1d1d;outline-offset:2px;box-shadow:0 0 0 1px #fef2f2}.skip-link{position:absolute;top:-100px;left:50%;transform:translate(-50%);background:#4f46e5;color:#fff;padding:.75rem 1.5rem;border-radius:0 0 8px 8px;text-decoration:none;font-weight:500;z-index:1000;transition:top .2s ease-in-out}.skip-link:focus{top:0;outline:3px solid #1e1b4b;outline-offset:2px;box-shadow:0 0 0 1px #fff,0 4px 8px #0000004d}.message:focus{outline:none}.message.focused{outline:3px solid #4f46e5;outline-offset:2px;box-shadow:0 0 0 6px #4f46e533}.message.user.focused{outline-color:#1e1b4b;box-shadow:0 0 0 6px #1e1b4b33}.messages:focus{outline:3px solid #312e81;outline-offset:-3px;box-shadow:inset 0 0 0 1px #fff}.messages:focus-visible{outline:3px solid #312e81;outline-offset:-3px;box-shadow:inset 0 0 0 1px #fff}.messages.navigation-mode{background:linear-gradient(to bottom,rgba(79,70,229,.05),transparent 50px)}.messages.navigation-mode:before{content:"Navigation Mode - Use ↑↓ arrows, Esc to exit";display:block;position:sticky;top:0;background:#4f46e5;color:#fff;padding:.5rem 1rem;margin:-1rem -1rem .75rem;font-size:.75rem;text-align:center;z-index:10}@media (prefers-reduced-motion: reduce){.message,.message.user.sent-confirmation{animation:none}.message .sent-checkmark{animation:none;opacity:1}.typing-indicator .dot{animation:none}}.audio-toggle{background:none;border:none;padding:.5rem;cursor:pointer;border-radius:6px;transition:background-color .2s,opacity .2s;display:flex;align-items:center;justify-content:center;opacity:.7}.audio-toggle:hover{background:#fff3;opacity:1}.audio-toggle:focus{outline:2px solid rgba(255,255,255,.8);outline-offset:2px;opacity:1}.audio-toggle svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2}.audio-toggle[aria-pressed=false] svg{opacity:.5}.chat-header{display:flex;align-items:center;justify-content:center;position:relative}.chat-header .audio-toggle{position:absolute;right:.75rem;top:50%;transform:translateY(-50%)}:root{--keyboard-height: 0px;--viewport-height: 100vh}.chat-container.keyboard-visible{height:var(--viewport-height, 100vh);max-height:var(--viewport-height, 100vh);transition:height .15s ease-out,max-height .15s ease-out}.chat-container{transition:height .15s ease-out,max-height .15s ease-out}@media screen and (max-width: 480px){body{padding:0;align-items:stretch}#app{max-width:none}.chat-container{border-radius:0;height:100vh;max-height:none}.chat-header{padding:.75rem}.chat-header h1{font-size:1.125rem}.messages{padding:.75rem;gap:.5rem}.message{max-width:90%;padding:.625rem .875rem;font-size:.9375rem;line-height:1.5}.message .timestamp{font-size:.6875rem}.chat-form{flex-direction:column;padding:.75rem;gap:.5rem}.chat-form input{width:100%;min-height:44px;padding:.625rem .875rem;font-size:1rem}.chat-form button{width:100%;min-height:44px;padding:.75rem 1rem;font-size:1rem}.error-banner{padding:.625rem .75rem;font-size:.8125rem}.error-dismiss{min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;padding:0}.typing-indicator{padding:.625rem .875rem}.messages.navigation-mode:before{padding:.375rem .75rem;margin:-.75rem -.75rem .5rem;font-size:.6875rem}.skip-link{padding:.625rem 1rem;font-size:.875rem}.chat-container.keyboard-visible{height:var(--viewport-height, 100vh);max-height:var(--viewport-height, 100vh)}.chat-container.keyboard-visible .chat-form{position:sticky;bottom:0;background:#fff;z-index:10;box-shadow:0 -2px 10px #0000001a}.chat-container.keyboard-visible .messages{min-height:0;flex-shrink:1}.chat-form input{font-size:16px}}