:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-height:100vh;background-color:#f8f9fa}h1,h2,h3,h4,h5,h6{margin:0}button,input{font-family:inherit}#root{margin:0;padding:0;height:100vh;font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{display:flex;height:100vh;background:#f8f9fa;overflow:hidden}.sidebar{width:260px;background:#2c2f33;color:#fff;display:flex;flex-direction:column;border-right:1px solid #202225}.sidebar-header{padding:1rem;border-bottom:1px solid #202225;display:flex;justify-content:space-between;align-items:center}.sidebar-header h2{margin:0;font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:#b9bbbe}.add-channel-btn{background:#36393f;border:none;color:#b9bbbe;width:32px;height:32px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.2rem;transition:all .2s ease}.add-channel-btn:hover{background:#40444b;color:#fff;transform:scale(1.05)}.channels-list{flex:1;padding:.5rem 0;overflow-y:auto}.channel-item{padding:.6rem 1rem;cursor:pointer;display:flex;align-items:center;transition:all .2s ease;border-radius:6px;margin:0 .5rem;position:relative}.channel-item:hover{background:#36393f}.channel-item.active{background:#5865f2;color:#fff}.channel-item.active .channel-hash{color:#fffc}.channel-hash{color:#72767d;margin-right:.5rem;font-weight:700}.channel-name{font-weight:500}.create-channel-form{padding:1rem;border-bottom:1px solid #202225;background:#36393f}.create-channel-form input{width:100%;padding:.5rem;border:1px solid #202225;border-radius:4px;background:#202225;color:#fff;margin-bottom:.5rem}.create-channel-form input::placeholder{color:#72767d}.form-actions{display:flex;gap:.5rem}.small-btn{padding:.4rem .8rem;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;font-weight:500}.small-btn.secondary{background:#72767d;color:#fff}.small-btn.secondary:hover{background:#5c5e66}.main-content{flex:1;display:flex;flex-direction:column;background:#fff}.chat-header{background:#fff;padding:1rem 1.5rem;border-bottom:1px solid #e3e5e8;display:flex;justify-content:space-between;align-items:center;box-shadow:0 1px 3px #0000001a}.chat-header h1{margin:0;color:#2f3136;display:flex;align-items:center;font-size:1.2rem}.chat-header h1 .channel-hash{color:#5865f2;margin-right:.5rem}.user-info{color:#72767d;font-size:.9rem}.chat-container{flex:1;display:flex;flex-direction:column}.messages{flex:1;overflow-y:auto;padding:1rem 1.5rem;max-height:calc(100vh - 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