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ease;display:inline-block}.room-card:hover{background-color:#e3e3e3;cursor:pointer}.room-card h3{margin:0 0 .5rem}.messages{padding-left:1rem}.message{padding:4px 0;border-bottom:1px solid #e2e2e2}.message:last-child{border-bottom:none}.empty{color:#888;font-style:italic}footer{padding:1rem;text-align:center;background:#1547a3;color:#fff;font-size:.9rem}.sidebar{display:flex;flex-direction:column;min-width:min-content;background-color:#fff;border-right:1px solid #ddd;transition:width .25s ease;overflow-y:auto;padding:5px}.sidebar.collapsed{min-width:55px;width:55px}.collapse-toggle{position:absolute;right:10px;top:18px;width:30px;height:30px;border-radius:50%;font-family:Impact,Haettenschweiler,Arial Narrow Bold,sans-serif;border:none;background:#fff;border:1px solid #ccc;cursor:pointer;z-index:2000}.sidebar-content{-webkit-user-select:none;user-select:none;opacity:1;transition:opacity .2s ease;text-align:center}.sidebar.collapsed 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button:not(.cancel){background:#3a6df0;color:#fff}.modal-actions button:not(.cancel):hover{background:#2f5be0}.modal-actions .cancel{background:#ccc;color:#333}.modal-actions .cancel:hover{background:#b5b5b5}button:disabled{opacity:.55;cursor:not-allowed}.error{color:#e63946;font-size:14px;margin-top:6px}@keyframes fadeIn{0%{opacity:0;transform:translate(-50%,-48%)}to{opacity:1;transform:translate(-50%,-50%)}}@media(max-width:768px){.hero h1{font-size:2.2rem}.hero p{font-size:1rem}header{flex-direction:column;gap:1rem}}.chat-window{display:flex;flex-direction:column;width:100%;height:100%;min-height:100%;background:#fff;box-shadow:0 4px 12px #00000014}.chat-header{color:#000;padding:12px 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#0000000a}.chat-message.msg-you .msg-bubble{background:linear-gradient(180deg,#5b6df6,#4a54d1);color:#fff;border-bottom-right-radius:4px;text-align:right}.chat-message.msg-other .msg-bubble{background:#f1f5f9;color:#0f172a;border-bottom-left-radius:4px;text-align:left}.chat-input{display:flex;gap:10px;padding:12px;background:#fafafa;border-top:1px solid #ddd;margin-top:auto}.chat-input input{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:6px;font-size:1rem}.chat-input button{background:#4a8bff;max-width:100%;padding:10px;border:none;border-radius:6px;color:#fff;cursor:pointer}.chat-input button:hover{background:#3f74db}.clear-btn{background:#ff5757;border:none;padding:6px 12px;border-radius:6px;color:#fff;cursor:pointer}.clear-btn:hover{background:#e14a4a}.leave-btn{background:#ff5757;border:none;padding:6px 12px;border-radius:6px;color:#fff;cursor:pointer}.leave-btn:hover{background:#e14a4a}.invite-btn{background:#4a8bff;border:none;padding:6px 12px;border-radius:6px;color:#fff;cursor:pointer}.invite-copied-msg{color:#4a8bff;font-weight:600;padding:6px 12px}.invite-btn:hover{background:#3f74db}.sidebar-header{width:100%;text-align:center;padding:12px 16px;align-items:center}.sidebar-footer{padding:10px;width:100%;text-align:center;margin-top:auto}.pincode-section{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;gap:20px;padding:30px;background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001a}.pincode-header{font-size:24px;font-weight:600}.pincode-input-group{display:flex;flex-direction:column;gap:20px;width:100%;max-width:300px}.pincode-input{width:100%;padding:15px;font-size:32px;text-align:center;letter-spacing:10px;border:2px solid rgba(255,255,255,.3);border-radius:8px;background:#ffffff1a;font-weight:700;transition:all .3s ease}.pincode-input::placeholder{color:#ffffff80;letter-spacing:10px}.pincode-input:focus{outline:none;background:#fff3;border-color:#fff9;box-shadow:0 0 20px #ffffff4d}.pincode-keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;width:100%;max-width:300px}.keypad-btn{padding:15px;font-size:20px;font-weight:600;border:none;border-radius:8px;background:#4a8bff;color:#fff;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 15px #0003}.keypad-btn:hover{background:#3f74db;transform:translateY(-2px)}.keypad-btn:active{transform:translateY(0);box-shadow:0 2px 8px #0003}.keypad-btn:disabled{opacity:.5;cursor:not-allowed}.pincode-btn{padding:12px 24px;font-size:16px;font-weight:600;border:none;border-radius:8px;background:#ffffffe6;color:#667eea;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px}.pincode-btn:hover:not(:disabled){background:#fff;transform:translateY(-2px);box-shadow:0 8px 20px #0003}.pincode-btn:disabled{opacity:.5;cursor:not-allowed}