.device-item{display:flex;align-items:center;justify-content:space-between;padding:15px;background:rgba(102,126,234,.05);border:2px solid rgba(102,126,234,.2);border-radius:12px;margin-bottom:12px;transition:all .3s ease}.device-item:hover{background:rgba(102,126,234,.1);border-color:rgba(102,126,234,.4);transform:translateX(5px)}.device-info{flex:1}.device-name{font-family:'Poppins',sans-serif;font-size:1.1rem;font-weight:600;color:#667eea;margin-bottom:5px}.device-details{font-family:'Roboto Mono',monospace;font-size:.85rem;color:#666}.device-power{font-family:'Roboto Mono',monospace;font-size:1.3rem;font-weight:700;color:#48bb78;margin:0 15px}.device-actions{display:flex;gap:8px}.btn-edit-device,.btn-delete-device{padding:8px 12px;border:none;border-radius:8px;font-size:.9rem;cursor:pointer;transition:all .3s ease}.btn-edit-device{background:rgba(102,126,234,.1);color:#667eea}.btn-edit-device:hover{background:#667eea;color:#fff}.btn-delete-device{background:rgba(239,68,68,.1);color:#ef4444}.btn-delete-device:hover{background:#ef4444;color:#fff}.btn-add-device{width:100%;padding:12px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.btn-add-device:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(102,126,234,.3)}.device-type-badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;margin-left:8px}.device-type-continuous{background:rgba(102,126,234,.15);color:#667eea}.device-type-charging{background:rgba(72,187,120,.15);color:#48bb78}.result-summary{display:grid;grid-template-columns:1fr;gap:15px;margin-bottom:20px}.result-item{background:linear-gradient(135deg,rgba(102,126,234,.08) 0%,rgba(118,75,162,.08) 100%);padding:15px;border-radius:12px;border-left:4px solid #667eea}.result-label{font-size:.9rem;color:#666;margin-bottom:5px}.result-value{font-family:'Roboto Mono',monospace;font-size:2rem;font-weight:700;color:#667eea}.result-unit{font-size:1.2rem;margin-left:5px}.suggestion-card{padding:15px;border-radius:12px;margin-bottom:10px;display:flex;align-items:start;gap:12px}.suggestion-card.success{background:rgba(72,187,120,.1);border-left:4px solid #48bb78}.suggestion-card.warning{background:rgba(245,158,11,.1);border-left:4px solid #f59e0b}.suggestion-card.error{background:rgba(239,68,68,.1);border-left:4px solid #ef4444}.suggestion-icon{font-size:1.5rem}.suggestion-content{flex:1}.suggestion-title{font-weight:600;margin-bottom:5px}.scenario-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:15px}.btn-scenario{padding:10px 15px;background:#fff;border:2px solid rgba(102,126,234,.3);border-radius:10px;color:#667eea;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-scenario:hover{background:rgba(102,126,234,.1);border-color:#667eea}.btn-scenario.active{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-color:#667eea;color:#fff}.chart-container{position:relative;height:300px;margin:20px 0}.calculation-steps{background:rgba(102,126,234,.05);padding:20px;border-radius:12px;margin-top:15px}.calculation-steps h4{font-family:'Poppins',sans-serif;color:#667eea;margin-bottom:15px}.calculation-step{padding:10px;background:#fff;border-radius:8px;margin-bottom:10px;font-family:'Roboto Mono',monospace;font-size:.9rem}.calculation-step .formula{color:#667eea;font-weight:600}.powerbank-selector{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:15px}.powerbank-option{padding:15px;background:#fff;border:2px solid rgba(102,126,234,.2);border-radius:12px;cursor:pointer;transition:all .3s ease}.powerbank-option:hover{border-color:#667eea;transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,.15)}.powerbank-option.selected{background:linear-gradient(135deg,rgba(102,126,234,.1) 0%,rgba(118,75,162,.1) 100%);border-color:#667eea;border-width:3px}.powerbank-name{font-weight:600;color:#667eea;margin-bottom:5px}.powerbank-specs{font-size:.85rem;color:#666}.empty-state{text-align:center;padding:40px 20px;color:#999}.empty-state i{font-size:3rem;color:rgba(102,126,234,.3);margin-bottom:15px}.empty-state p{font-size:1.1rem}@media(max-width:768px){.device-item{flex-direction:column;align-items:flex-start}.device-power{margin:10px 0}.device-actions{width:100%;justify-content:flex-end}.result-value{font-size:1.5rem}.scenario-buttons{grid-template-columns:1fr}.powerbank-selector{grid-template-columns:1fr}.chart-container{height:250px}}.katex-display{margin:15px 0;overflow-x:auto;overflow-y:hidden}.katex{font-size:1.1em}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;z-index:9999;animation:fadeIn .3s ease}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.modal-dialog{width:90%;max-width:550px;max-height:90vh;overflow-y:auto;animation:slideUp .3s ease}@keyframes slideUp{from{transform:translateY(50px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-content{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);overflow:hidden}.modal-header{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:20px;display:flex;align-items:center;justify-content:space-between}.modal-header h3{margin:0;font-family:'Poppins',sans-serif;font-size:1.3rem;font-weight:600}.btn-close-modal{background:none;border:none;color:#fff;font-size:2rem;line-height:1;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background .3s ease}.btn-close-modal:hover{background:rgba(255,255,255,.2)}.modal-body{padding:25px}.form-group{margin-bottom:20px}.form-group label{display:block;font-weight:600;color:#333;margin-bottom:8px;font-size:.95rem}.form-group small{display:block;margin-top:5px;font-size:.85rem}.preview-box{background:rgba(102,126,234,.08);border:2px dashed rgba(102,126,234,.3);border-radius:10px;padding:15px;margin-top:15px}.preview-box strong{color:#667eea;display:block;margin-bottom:8px}.preview-box div{font-family:'Roboto Mono',monospace;font-size:1rem;color:#333;font-weight:600}.modal-footer{padding:20px;background:#f9f9f9;display:flex;gap:10px;justify-content:flex-end}.modal-footer .btn{min-width:100px}@media(max-width:576px){.modal-dialog{width:95%;max-height:95vh}.modal-header{padding:15px}.modal-header h3{font-size:1.1rem}.modal-body{padding:20px 15px}.modal-footer{padding:15px;flex-direction:column}.modal-footer .btn{width:100%}}