*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.app{min-height:100vh;display:flex;flex-direction:column}.app-loading{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100vh;gap:1rem}.loading-spinner{width:40px;height:40px;border:4px solid #e3e3e3;border-top:4px solid #1da1f2;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.app-header{background:linear-gradient(135deg,#1da1f2,#1991db);color:#fff;padding:1rem 2rem;box-shadow:0 2px 10px #0000001a}.header-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.app-title{display:flex;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:700}.app-icon{font-size:1.8rem}.header-right{display:flex;align-items:center;gap:1rem}.user-info{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#ffffff1a;border-radius:20px;font-size:.9rem}.logout-button{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#ffffff1a;border:none;color:#fff;border-radius:20px;cursor:pointer;transition:background-color .2s}.logout-button:hover{background:#fff3}.app-main{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.main-content{display:flex;flex-direction:column;gap:2rem}.auth-container{display:flex;justify-content:center;align-items:center;min-height:60vh}.auth-card{background:#fff;padding:2rem;border-radius:15px;box-shadow:0 10px 30px #0000001a;width:100%;max-width:400px}.auth-header{text-align:center;margin-bottom:2rem}.auth-header h1{font-size:2rem;margin-bottom:.5rem;color:#1da1f2}.auth-form{display:flex;flex-direction:column;gap:1rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:#333}.form-group input,.form-group textarea{padding:.75rem;border:2px solid #e1e8ed;border-radius:8px;font-size:1rem;transition:border-color .2s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:#1da1f2}.auth-button{padding:.75rem;background:#1da1f2;color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s;margin-top:1rem}.auth-button:hover:not(:disabled){background:#1991db}.auth-button:disabled{background:#ccc;cursor:not-allowed}.auth-switch{text-align:center;margin-top:1rem}.switch-button{background:none;border:none;color:#1da1f2;cursor:pointer;font-weight:600;margin-left:.5rem}.switch-button:hover{text-decoration:underline}.message-form-container{margin-bottom:2rem}.message-form-card{background:#fff;padding:1.5rem;border-radius:15px;box-shadow:0 5px 15px #00000014}.message-form-card h3{margin-bottom:1rem;color:#1da1f2}.message-form{display:flex;flex-direction:column;gap:1rem}.form-actions{display:flex;justify-content:space-between;align-items:center}.char-count{font-size:.9rem;color:#666}.publish-button{padding:.75rem 1.5rem;background:#1da1f2;color:#fff;border:none;border-radius:20px;font-weight:600;cursor:pointer;transition:background-color .2s}.publish-button:hover:not(:disabled){background:#1991db}.publish-button:disabled{background:#ccc;cursor:not-allowed}.message-list-container{background:#fff;border-radius:15px;box-shadow:0 5px 15px #00000014;overflow:hidden}.message-list-header{padding:1.5rem;background:#f8f9fa;border-bottom:1px solid #e1e8ed}.message-list-header h3{color:#1da1f2}.message-list{max-height:70vh;overflow-y:auto}.loading-message{display:flex;flex-direction:column;align-items:center;padding:3rem;gap:1rem}.empty-state{text-align:center;padding:3rem;color:#666}.message-card{padding:1.5rem;border-bottom:1px solid #e1e8ed;transition:background-color .2s}.message-card:hover{background:#f8f9fa}.message-card:last-child{border-bottom:none}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.message-meta{display:flex;align-items:center;gap:1rem}.author-name{font-weight:600;color:#1da1f2}.message-time{font-size:.9rem;color:#666}.message-actions{display:flex;gap:.5rem}.action-button{padding:.5rem;border:none;border-radius:50%;cursor:pointer;transition:background-color .2s;display:flex;align-items:center;justify-content:center}.edit-button{background:#e3f2fd;color:#1976d2}.edit-button:hover{background:#bbdefb}.delete-button{background:#ffebee;color:#d32f2f}.delete-button:hover{background:#ffcdd2}.save-button{background:#e8f5e8;color:#2e7d32}.save-button:hover{background:#c8e6c9}.cancel-button{background:#fafafa;color:#666}.cancel-button:hover{background:#f0f0f0}.message-content{margin-bottom:1rem}.message-title{font-size:1.1rem;font-weight:600;margin-bottom:.5rem;color:#333}.message-text{color:#666;line-height:1.6}.edit-form{display:flex;flex-direction:column;gap:.5rem}.edit-title,.edit-content{padding:.5rem;border:2px solid #e1e8ed;border-radius:8px;font-size:1rem}.edit-title:focus,.edit-content:focus{outline:none;border-color:#1da1f2}.updated-indicator{font-size:.8rem;color:#666;font-style:italic}.error-message{background:#ffebee;color:#d32f2f;padding:.75rem;border-radius:8px;border-left:4px solid #d32f2f;margin:.5rem 0}.app-footer{background:#f8f9fa;padding:1rem;text-align:center;color:#666;border-top:1px solid #e1e8ed}@media (max-width: 768px){.app-main{padding:1rem}.header-content{padding:0 1rem}.auth-card{margin:1rem}.message-header{flex-direction:column;align-items:flex-start;gap:.5rem}.form-actions{flex-direction:column;gap:1rem}}