:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg-page: #f0f0f0;--bg-header: #ffffff;--bg-panel: #ffffff;--bg-input: #ffffff;--color-user: #e0e0e0;--color-bot: #0053ba;--color-text: #333333}*{box-sizing:border-box}body,#root{margin:0;height:100vh;background:var(--bg-page);color:var(--color-text);font-family:sans-serif}.container{position:relative;display:flex;flex-direction:column;height:100%;max-width:450px;width:100%;margin:0 auto}.header{padding:1rem;background:var(--bg-header);border-bottom:1px solid #ddd}.header-title{display:flex;justify-content:space-between;align-items:center}.header-title h1{margin:0;font-size:1.5rem}.header-actions .icon-btn{margin-left:.5rem;cursor:pointer;font-size:1.2rem;color:#999}.header-actions .icon-btn:hover{color:#333}.chat-window{flex:1;padding:1rem;background:var(--bg-panel);overflow-y:auto}.welcome-message{font-size:1rem;color:#666;background:#f8f8f8;padding:1rem;border-radius:10px;margin-bottom:1rem;text-align:center}.message-row{display:flex;align-items:flex-end;margin-bottom:.75rem}.message-row.user{justify-content:flex-end}.message-row.bot{justify-content:flex-start}.avatar{width:32px;height:32px;border-radius:50%;margin-right:.5rem}.bubble{max-width:75%;padding:.75rem 1rem;border-radius:1rem;line-height:1.3;color:#fff;word-wrap:break-word;white-space:pre-wrap}.message-row.user .bubble{background:var(--color-user);color:#000;border-radius:1rem 1rem .25rem}.message-row.bot .bubble{background:var(--color-bot);color:#fff;border-radius:1rem 1rem 1rem .25rem}.input-bar{display:flex;padding:.5rem;background:var(--bg-input);border-top:1px solid #ddd}.input-bar input{flex:1;padding:.5rem;border:1px solid #ccc;border-radius:4px;margin-right:.5rem;background:#fafafa;color:var(--color-text)}.input-bar input:focus{outline:none;border-color:var(--color-bot)}.input-bar button{padding:0 1rem;border:none;border-radius:4px;background:var(--color-bot);color:#fff;cursor:pointer}.input-bar button:hover{opacity:.9}.modal-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#0009;display:flex;justify-content:center;align-items:center;z-index:10}.modal-box{background:#fff;color:#333;padding:2rem;max-width:360px;width:90%;border-radius:12px;box-shadow:0 8px 24px #0003;text-align:center}.modal-box h2{color:#007960;margin-bottom:1rem;font-size:1.25rem}.modal-box p{font-size:.95rem;line-height:1.5;margin-bottom:1.5rem}.modal-box button{padding:.6rem 1.2rem;margin:0 .5rem;border:none;border-radius:6px;cursor:pointer;font-size:.9rem}.modal-box button:first-child{background-color:#007960;color:#fff}.modal-box button:last-child{background-color:#e0e0e0;color:#333}.star-rating{display:flex;justify-content:center;gap:.4rem;font-size:1.5rem;cursor:pointer}.star{color:#ccc}.star.selected{color:#f8b400}.modal-box textarea{width:100%;height:80px;padding:.5rem;border-radius:6px;border:1px solid #ccc;resize:none;font-size:.95rem}