:root{font-family:Inter,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}}.chat-container{display:flex;width:100vw;height:100vh;font-family:sans-serif;background-color:#1a1a1a;color:#fff}.sidebar{width:260px;background-color:#202123;border-right:1px solid #3e3f4b;padding:20px}.chat-main{display:flex;flex-direction:column;flex:1;height:100%}.message-list{flex:1;padding:20px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.message-item{max-width:60%;padding:10px 14px;border-radius:8px;line-height:1.4}.message-item.sent{align-self:flex-end;background-color:#0b93f6}.message-item.received{align-self:flex-start;background-color:#3e3f4b}.input-area{padding:20px;background-color:#202123;display:flex;gap:10px}.chat-input{flex:1;padding:12px;border-radius:6px;border:1px solid #3e3f4b;background-color:#343541;color:#fff;outline:none}.send-button{padding:0 20px;background-color:#0b93f6;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:700}.send-button:hover{background-color:#087cd1}.landing-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;width:100vw;background:linear-gradient(135deg,#1a1a1a,#0d0d0d);color:#fff;font-family:sans-serif;text-align:center;padding:20px}.hero-title{font-size:4rem;font-weight:800;margin-bottom:10px;background:-webkit-linear-gradient(45deg,#0b93f6,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-1.5px}.hero-subtitle{font-size:1.2rem;color:#a1a1aa;max-width:600px;margin-bottom:40px;line-height:1.6}.feature-grid{display:flex;gap:20px;margin-bottom:50px}.feature-card{background-color:#202123;border:1px solid #3e3f4b;padding:20px;border-radius:12px;width:200px;text-align:left}.feature-card h3{margin-top:0;color:#e4e4e7;font-size:1.1rem}.feature-card p{color:#a1a1aa;font-size:.9rem;margin-bottom:0}.cta-button{background-color:#0b93f6;color:#fff;border:none;padding:16px 32px;font-size:1.1rem;font-weight:700;border-radius:8px;cursor:pointer;transition:transform .2s,background-color .2s}.cta-button:hover{background-color:#087cd1;transform:translateY(-2px)}