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1.5rem;color:#333}.quick-actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.action-card{background:#f8f9fa;border-radius:8px;padding:1.5rem;text-align:center;transition:all .3s ease}.action-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}.action-card h3{margin:0 0 .5rem;color:#333;font-size:1.1rem}.action-card p{margin:0 0 1rem;color:#666;font-size:.9rem}.common-topics{display:flex;flex-direction:column;gap:.5rem}.connection-history-section{background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:1.5rem;box-shadow:0 2px 4px #0000001a}.connection-history-section h2{margin:0 0 1.5rem;color:#333}.history-list{display:flex;flex-direction:column;gap:.75rem;max-height:400px;overflow-y:auto}.history-item{display:flex;align-items:center;gap:1rem;padding:.75rem;background:#f8f9fa;border-radius:6px;transition:all .3s ease}.history-item:hover{background:#e9ecef}.history-timestamp{min-width:100px;font-size:.9rem;color:#666;font-family:Courier New,monospace}.history-status{display:flex;align-items:center;gap:.5rem;min-width:120px}.status-dot{width:8px;height:8px;border-radius:50%}.history-details{display:flex;gap:1rem;font-size:.8rem;color:#666;flex:1;justify-content:flex-end}.loading{text-align:center;padding:3rem;color:#6c757d;font-size:1.1rem}@media (max-width: 768px){.mqtt-client-status{padding:1rem}.header{flex-direction:column;gap:1rem;align-items:stretch}.header-actions{justify-content:space-between}.status-indicator{flex-direction:column;text-align:center;gap:1rem}.status-text h2{font-size:1.5rem}.client-info-grid,.quick-actions-grid{grid-template-columns:1fr}.topic-item{flex-direction:column;gap:1rem;align-items:stretch}.topic-actions{justify-content:center}.history-item{flex-direction:column;gap:.5rem;align-items:stretch}.history-details{justify-content:flex-start}}.access-denied{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:2rem}.access-denied-container{background:#fff;border-radius:12px;padding:3rem;text-align:center;box-shadow:0 10px 25px #0003;max-width:500px;width:100%}.access-denied-icon{font-size:4rem;margin-bottom:1.5rem}.access-denied h1{color:#333;margin:0 0 1rem;font-size:2rem;font-weight:700}.access-denied p{color:#666;margin:0 0 1rem;font-size:1.1rem;line-height:1.6}.access-denied-detail{background:#f8f9fa;border:1px solid #e9ecef;border-radius:6px;padding:1rem;margin:1.5rem 0;color:#495057}.access-denied-detail strong{color:#00ab57;font-weight:700}.access-denied-actions{margin-top:2rem}.btn{padding:.75rem 1.5rem;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:all .3s ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem;font-size:1rem}.btn-primary{background-color:#00ab57;color:#fff}.btn-primary:hover{background-color:#008f47;transform:translateY(-1px);box-shadow:0 4px 8px #00ab574d}@media (max-width: 768px){.access-denied{padding:1rem}.access-denied-container{padding:2rem}.access-denied-icon{font-size:3rem}.access-denied h1{font-size:1.5rem}.access-denied p{font-size:1rem}}.user-preferences{padding:2rem;max-width:800px;margin:0 auto;min-height:100vh;color:#fff}.preferences-container{background:#2c2c3ccc;border-radius:12px;padding:2rem;box-shadow:0 4px 6px #0000004d}.preferences-container h1{margin:0 0 2rem;color:#e0e0e0;font-size:2rem;border-bottom:2px solid #00ab57;padding-bottom:1rem}.preferences-section{margin-bottom:2rem}.preferences-section h2{margin:0 0 .5rem;color:#e0e0e0;font-size:1.5rem}.section-description{color:#b0b0b0;margin-bottom:1.5rem;font-size:.95rem}.color-picker-section{margin-bottom:2rem}.color-picker-section label{display:block;margin-bottom:.5rem;color:#e0e0e0;font-weight:500}.color-input-group{display:flex;gap:1rem;align-items:center}.color-picker{width:80px;height:50px;border:2px solid #555;border-radius:8px;cursor:pointer;background:none;padding:0}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:none;border-radius:6px}.color-text-input{flex:1;padding:.75rem;border:2px solid #555;border-radius:8px;background:#2c2c3c;color:#fff;font-size:1rem;font-family:monospace}.color-text-input:focus{outline:none;border-color:#00ab57}.preset-colors-section{margin-top:2rem}.preset-colors-section label{display:block;margin-bottom:.5rem;color:#e0e0e0;font-weight:500}.preset-colors{display:flex;gap:1rem;flex-wrap:wrap}.preset-color-btn{width:60px;height:60px;border:3px solid transparent;border-radius:8px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;font-weight:700;text-shadow:0 1px 2px rgba(0,0,0,.5)}.preset-color-btn:hover{transform:scale(1.1);border-color:#00ab57}.preset-color-btn.active{border-color:#00ab57;box-shadow:0 0 10px #00ab5780}.message{padding:1rem;border-radius:8px;margin-bottom:1.5rem;font-weight:500}.message.success{background-color:#2d5016;color:#90ee90;border:1px solid #4caf50}.message.error{background-color:#501616;color:#ff6b6b;border:1px solid #f44336}.actions{display:flex;gap:1rem;margin-top:2rem;flex-wrap:wrap}.save-btn,.reset-btn,.cancel-btn{padding:.75rem 1.5rem;border:none;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:500;transition:all .3s ease}.save-btn{background-color:#00ab57;color:#fff}.save-btn:hover:not(:disabled){background-color:#008f47;transform:translateY(-2px)}.save-btn:disabled{opacity:.6;cursor:not-allowed}.reset-btn{background-color:#6c757d;color:#fff}.reset-btn:hover:not(:disabled){background-color:#5a6268}.cancel-btn{background-color:transparent;color:#e0e0e0;border:2px solid #555}.cancel-btn:hover{border-color:#777;background-color:#ffffff0d}.loading{text-align:center;padding:2rem;color:#b0b0b0}@media (max-width: 768px){.user-preferences{padding:1rem}.preferences-container{padding:1.5rem}.color-input-group{flex-direction:column;align-items:stretch}.color-picker{width:100%}.actions{flex-direction:column}.actions button{width:100%}}