:root{--bg-primary: #1a1a1a;--bg-secondary: #252525;--bg-tertiary: #2f2f2f;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--accent-primary: #4a9eff;--accent-secondary: #6eb5ff;--success: #4caf50;--warning: #ff9800;--error: #f44336;--border: #3a3a3a;--shadow: rgba(0, 0, 0, .3);--top-bar-height: 60px;--sidebar-width: 250px;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px}[data-theme=light]{--bg-primary: #f5f5f5;--bg-secondary: #ffffff;--bg-tertiary: #e8e8e8;--text-primary: #1a1a1a;--text-secondary: #666666;--border: #d0d0d0;--shadow: rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Jost,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;font-size:1rem!important}.hidden{display:none!important}.mobile-warning{display:none;background:var(--warning);color:#000;padding:10px 16px;text-align:center;font-size:.9rem;line-height:1.4;position:relative;z-index:100}.mobile-warning strong{display:block;margin-bottom:2px}@media (max-width: 700px){.mobile-warning{display:block}}.warning{position:fixed;top:0;left:0;right:0;background:var(--warning);color:#000;padding:var(--spacing-md);text-align:center;z-index:9999}.warning strong{display:block;margin-bottom:var(--spacing-xs);font-size:1.1rem}.app-container{display:flex;height:100vh}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto;overflow-x:hidden;padding:0}.logo{width:100%!important;height:auto!important;aspect-ratio:16/9!important;display:block;margin:0;padding:0;flex-shrink:0;border-bottom:1px solid var(--border)}.app-title{font-size:1.2rem!important;font-weight:400;color:var(--text-primary)}.version{font-size:.9rem!important;color:var(--text-secondary);padding:2px 8px;background:var(--bg-tertiary);border-radius:var(--radius-sm)}.top-bar-right{display:flex;align-items:center;gap:var(--spacing-sm)}.btn-connect,.btn-disconnect{display:flex;align-items:center;gap:var(--spacing-xs);padding:8px 16px;border:none;border-radius:var(--radius-sm);font-size:.9rem!important;font-weight:400;cursor:pointer;transition:all .3s ease}.btn-connect{background:var(--accent-primary);color:#fff}.btn-connect:hover{background:var(--accent-secondary)}.btn-connect.connecting{opacity:.8;cursor:wait;pointer-events:none}.btn-connect.connecting .btn-connect-icon{display:none}.btn-spinner{display:none;width:13px;height:13px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}.btn-connect.connecting .btn-spinner{display:block}.btn-disconnect{background:var(--error);color:#fff}.btn-disconnect:hover{opacity:.9}.btn-icon{font-size:1.1rem!important}.theme-toggle{background:transparent;border:none;padding:6px;cursor:pointer;border-radius:var(--radius-sm);transition:background .3s ease}.theme-toggle:hover{background:#ffffff1a}.theme-icon{width:24px;height:24px;display:block}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.top-bar{height:var(--top-bar-height);background:var(--bg-secondary);display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg);border-bottom:1px solid var(--border);flex-shrink:0}.top-bar-left{display:flex;align-items:center;gap:var(--spacing-md)}.sidebar-sections{display:flex;flex-direction:column;gap:var(--spacing-xs);flex:1}.sidebar-btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border:none;background:transparent;color:var(--text-secondary);font-size:.95rem!important;text-align:left;cursor:pointer;transition:all .3s ease;border-left:3px solid transparent}.sidebar-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.sidebar-btn.active{background:var(--bg-tertiary);color:var(--accent-primary);border-left-color:var(--accent-primary)}.sidebar-icon{font-size:1.2rem!important;width:24px;text-align:center}.content-area{flex:1;overflow-y:auto;padding:var(--spacing-lg)}.content-section{display:none}.content-section.active{display:block}.content-section h2{font-size:1.8rem!important;font-weight:400;margin-bottom:var(--spacing-lg);color:var(--text-primary)}.content-section h3{font-size:1.3rem!important;font-weight:400;margin-bottom:var(--spacing-md);color:var(--text-primary)}.content-section h4{font-size:1.1rem!important;font-weight:400;margin-bottom:var(--spacing-sm);color:var(--text-secondary)}.card{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-lg);border:1px solid var(--border);box-shadow:0 2px 8px var(--shadow)}.card.compact{padding:var(--spacing-md);margin-bottom:var(--spacing-md)}.card.compact h3{margin-bottom:var(--spacing-sm);font-size:1.1rem!important}.card.compact h4{margin-bottom:var(--spacing-xs);font-size:.95rem!important}.header-with-status{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.header-with-status h2{margin:0}.heading-with-help{display:flex;align-items:center;gap:8px}.heading-with-help h2,.heading-with-help h3{margin:0}.inline-status{display:flex;align-items:center;gap:var(--spacing-xs);font-size:1rem;font-weight:500}.inline-status .status-indicator{width:14px;height:14px;border-radius:50%;flex-shrink:0}.inline-status.disconnected .status-indicator{background:var(--error)}.inline-status.connected .status-indicator{background:var(--success);box-shadow:0 0 8px var(--success)}.success-badge{display:flex;align-items:center;gap:6px;padding:6px 14px;background:#4caf5026;border:1px solid var(--success);border-radius:16px;font-size:.95rem;font-weight:500;color:var(--success)}.success-badge span{font-size:1.1rem}.header-with-subtitle{margin-bottom:var(--spacing-sm)}.header-with-subtitle h3{margin:0 0 1px}.progress-subtitle{font-size:.85rem;color:#999;margin:0;line-height:1.3}.status-text{font-size:.85rem!important}.firmware-source{margin-bottom:var(--spacing-lg)}.releases-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.release-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm);background:var(--bg-tertiary);border-radius:var(--radius-sm);border:1px solid var(--border)}.release-info{flex:1}.release-name{font-weight:400;color:var(--text-primary);display:block}.release-date{font-size:.85rem!important;color:var(--text-secondary)}.loading{color:var(--text-secondary);font-style:italic}.spinner{display:inline-block;width:20px;height:20px;border:3px solid var(--border);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite;margin-right:8px;vertical-align:middle}.spinner-container{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--text-secondary);padding:var(--spacing-md)}@keyframes spin{to{transform:rotate(360deg)}}.version-select-container{margin-bottom:var(--spacing-md)}.version-select-container label{display:block;font-size:.9rem!important;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.version-select-container select{width:100%;padding:var(--spacing-sm);background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:Jost,sans-serif;font-size:1rem!important;cursor:pointer;transition:all .2s ease}.version-select-container select:hover{border-color:var(--accent-primary)}.version-select-container select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #4a9eff1a}.version-select-container select option{background:var(--bg-secondary);color:var(--text-primary);padding:var(--spacing-sm)}.releases-scroll-container{max-height:180px;overflow-y:auto;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-tertiary)}.releases-scroll-container::-webkit-scrollbar{width:8px}.releases-scroll-container::-webkit-scrollbar-track{background:var(--bg-tertiary)}.releases-scroll-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.releases-scroll-container::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.release-list-item{padding:8px 12px;border-bottom:1px solid var(--border);cursor:pointer;transition:all .2s ease;background:var(--bg-secondary)}.release-list-item:last-child{border-bottom:none}.release-list-item:hover{background:var(--bg-tertiary)}.release-list-item.selected{background:#4a9eff26;border-left:3px solid var(--accent-primary);padding-left:9px}.release-list-item .release-version{font-size:.85rem!important;font-weight:500!important;color:var(--text-primary);margin-bottom:2px}.release-list-item.selected .release-version{color:var(--accent-primary)}.release-list-item .release-meta{font-size:.75rem!important;color:var(--text-secondary);display:flex;gap:8px}.release-list-item .release-badge{display:inline-block;padding:1px 5px;background:var(--accent-primary);color:#fff;border-radius:3px;font-size:.65rem!important;font-weight:500!important;text-transform:uppercase}.divider{text-align:center;color:var(--text-secondary);margin:var(--spacing-sm) 0;position:relative;font-size:.85rem!important}.divider:before,.divider:after{content:"";position:absolute;top:50%;width:42%;height:1px;background:var(--border)}.divider:before{left:0}.divider:after{right:0}.file-upload-area{position:relative}#file-input{position:absolute;opacity:0;pointer-events:none}.file-drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-md);background:var(--bg-tertiary);border:2px dashed var(--border);border-radius:var(--radius-md);cursor:pointer;transition:all .3s ease;text-align:center;min-height:60px}.file-drop-zone:hover,.file-drop-zone.drag-over{border-color:var(--accent-primary);background:var(--bg-secondary)}.upload-icon{font-size:1.5rem!important;margin-bottom:4px}#file-name{font-size:.85rem!important;color:var(--text-secondary)}#file-name{color:var(--text-secondary)}.btn{padding:var(--spacing-sm) var(--spacing-md);border:none;border-radius:var(--radius-sm);font-size:.95rem!important;font-weight:400;cursor:pointer;transition:all .3s ease}.btn-primary{background:var(--accent-primary);color:#fff}.btn-primary:hover{background:var(--accent-secondary)}.btn-primary:disabled{background:var(--text-secondary);cursor:not-allowed}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-secondary)}.btn-danger{background:var(--error, #f44336);color:#fff}.btn-danger:hover{background:#d32f2f}.btn-danger:disabled{background:var(--text-secondary);cursor:not-allowed}.clear-data-toggle{display:flex;flex-direction:column;gap:6px;margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}.toggle-label{display:flex;align-items:center;gap:10px;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.9rem;color:var(--text-primary)}.toggle-label input[type=checkbox]{width:16px;height:16px;accent-color:var(--error, #f44336);cursor:pointer}.clear-data-warning{font-size:.82rem;color:var(--error, #f44336);margin:0;padding:6px 8px;background:#f4433614;border-left:3px solid var(--error, #f44336);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.card-description{font-size:.85rem;color:var(--text-secondary);margin:0 0 12px}.flash-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:var(--spacing-md);align-items:stretch;margin-bottom:var(--spacing-md)}.flash-col-main,.flash-col-side{display:flex;flex-direction:column}.flash-col-main .card{flex:1;margin-bottom:0}.flash-col-side .card{margin-bottom:var(--spacing-md)}.flash-col-side .card:last-child{margin-bottom:0}.progress-steps{display:flex;justify-content:space-between;margin-bottom:var(--spacing-sm);gap:8px}.step{display:flex;flex-direction:column;align-items:center;gap:4px;flex:1;opacity:.4;transition:opacity .3s ease}.step.active,.step.complete{opacity:1}.step-icon{width:32px;height:32px;border-radius:50%;background:var(--bg-tertiary);border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-weight:400;font-size:.9rem!important}.step.active .step-icon{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.step.complete .step-icon{background:var(--success);border-color:var(--success);color:#fff}.step.complete .step-icon:before{content:"✓"}.step-label{font-size:.75rem!important;color:var(--text-secondary);text-align:center;white-space:nowrap}.step.active .step-label{color:var(--text-primary);font-weight:400}.step-progress{width:100%;height:3px;background:var(--bg-tertiary);border-radius:2px;overflow:hidden;margin-top:2px;opacity:0;transition:opacity .3s ease}.step.active .step-progress,.step.complete .step-progress{opacity:1}.step-progress-fill{height:100%;background:var(--accent-primary);width:0%;transition:width .3s ease}.step.complete .step-progress-fill{width:100%;background:var(--success)}.step.step-skipped:not(.active):not(.complete){opacity:.7}.step.step-skipped:not(.active):not(.complete) .step-icon{border-color:var(--error, #f44336);font-size:0!important}.step.step-skipped:not(.active):not(.complete) .step-icon:before{content:"✕";font-size:.9rem;color:var(--error, #f44336)}.step.step-skipped:not(.active):not(.complete) .step-label{color:var(--error, #f44336)}.overall-progress{margin:var(--spacing-sm) 0 0 0}.progress-label{display:flex;justify-content:space-between;margin-bottom:var(--spacing-xs);font-size:.9rem!important;color:var(--text-secondary)}.progress-bar{width:100%;height:24px;background:var(--bg-tertiary);border-radius:var (--radius-sm);overflow:hidden;margin-bottom:var(--spacing-xs);position:relative}.progress-percent-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:.8rem!important;font-weight:500!important;color:var(--text-primary);z-index:10;pointer-events:none}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));width:0%;transition:width .3s ease,background .5s ease;border-radius:var(--radius-sm)}.progress-fill.success{background:linear-gradient(90deg,#43a047,#66bb6a)}.progress-message{text-align:center;color:var(--text-secondary);font-size:.8rem!important;margin:0;line-height:1.3}.success-card{border-color:var(--success);background:var(--bg-secondary)}.error-card{border-color:var(--error);background:var(--bg-secondary)}#error-message{color:var(--error);margin:var(--spacing-md) 0}.info-box{background:var(--bg-secondary);border-left:4px solid var(--accent-primary);padding:var(--spacing-md);border-radius:var(--radius-sm);margin-top:var(--spacing-lg)}.info-box.success{border-left-color:var(--success)}.info-box strong{display:block;margin-bottom:var(--spacing-xs)}.info-box ul{margin-left:var(--spacing-md);color:var(--text-secondary)}.info-box li{margin-bottom:var(--spacing-xs)}.note{color:var(--text-secondary);font-size:.9rem!important;margin-top:var(--spacing-sm)}.section-description{color:var(--text-secondary);margin-bottom:var(--spacing-lg);line-height:1.6}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-md);margin-bottom:var(--spacing-md)}.info-item{display:flex;justify-content:space-between;padding:var(--spacing-sm);background:var(--bg-tertiary);border-radius:var(--radius-sm)}.info-label{color:var(--text-secondary);font-weight:400}.info-value{color:var(--text-primary);font-family:Monaco,Menlo,monospace;font-size:.9rem!important}.terminal-container{border:1px solid #3c3c3c;border-radius:var(--radius-md);overflow:hidden;background:#1e1e1e}.terminal-toolbar{background:#2d2d2d;border-bottom:1px solid #3c3c3c;padding:5px 10px;min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:8px}.terminal-toolbar-left{display:flex;align-items:center;gap:8px;min-width:0}.terminal-toolbar-right{display:flex;align-items:center;gap:6px;flex-shrink:0}.terminal-port-label{font-family:Monaco,Menlo,Courier New,monospace;font-size:.75rem;color:gray;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.terminal-port-label.connected{color:#4ec9b0}.terminal-checkbox{display:flex;align-items:center;gap:5px;font-size:.78rem;color:#9d9d9d;cursor:pointer;-webkit-user-select:none;user-select:none}.terminal-checkbox input[type=checkbox]{accent-color:#4ec9b0;width:13px;height:13px;cursor:pointer}.terminal-btn{background:transparent;border:1px solid #4c4c4c;color:#ccc;padding:2px 10px;border-radius:3px;font-size:.78rem;cursor:pointer;transition:background .15s,border-color .15s;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}.terminal-btn:hover{background:#3c3c3c;border-color:#6c6c6c}.terminal-btn.terminal-btn-primary{border-color:#4ec9b0;color:#4ec9b0}.terminal-btn.terminal-btn-primary:hover{background:#4ec9b026}.terminal-btn.terminal-btn-danger{border-color:#f48771;color:#f48771}.terminal-btn.terminal-btn-danger:hover{background:#f4877126}.serial-output{background:#1e1e1e;padding:8px 12px;font-family:Monaco,Menlo,Courier New,monospace;font-size:.82rem!important;height:480px;overflow-y:auto;color:#ccc;line-height:1.55;scrollbar-width:thin;scrollbar-color:#424242 #1e1e1e}.serial-output::-webkit-scrollbar{width:8px}.serial-output::-webkit-scrollbar-track{background:#1e1e1e}.serial-output::-webkit-scrollbar-thumb{background:#424242;border-radius:4px}.serial-output::-webkit-scrollbar-thumb:hover{background:#555}.serial-placeholder{color:#555;font-style:italic}.serial-line-info{color:#ccc}.serial-line-ok{color:#4ec9b0}.serial-line-warn{color:#dcdcaa}.serial-line-error{color:#f48771}.serial-line-prompt{color:#6a9955}.serial-line-header{color:#9cdcfe}.serial-line-value{color:#ce9178}.about-content{text-align:center}.about-logo{width:120px;margin:0 auto var(--spacing-lg)}.about-content h3{margin-bottom:var(--spacing-sm)}.about-description{max-width:600px;margin:0 auto var(--spacing-lg);color:var(--text-secondary);line-height:1.6}.about-content h4{margin-top:var(--spacing-lg);margin-bottom:var(--spacing-md);text-align:center}.about-content ul{max-width:500px;margin:0 auto var(--spacing-lg);text-align:left;list-style-position:inside}.link-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-sm);max-width:800px;margin:0 auto var(--spacing-lg)}.project-link{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:var(--bg-tertiary);border-radius:var(--radius-sm);text-decoration:none;color:var(--text-primary);border:1px solid var(--border);transition:all .3s ease}.project-link:hover{border-color:var(--accent-primary);transform:translateY(-2px)}.project-link span:first-child{font-size:1.5rem}.copyright{margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid var(--border);color:var(--text-secondary);font-size:.85rem}.toast{position:fixed;top:24px;left:50%;transform:translate(-50%);min-width:280px;max-width:480px;padding:12px 16px;border-radius:var(--radius-sm);display:flex;align-items:center;gap:10px;font-size:.9rem;z-index:2000;box-shadow:0 4px 20px #0006;background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-primary);opacity:0;pointer-events:none;transition:opacity .2s ease}.toast.visible{opacity:1;pointer-events:auto}.toast-error{border-color:var(--error);background:#f443361f;color:#ff8a80}.toast-success{border-color:var(--success);background:#4caf501f;color:#69f0ae}.toast span:first-child{flex:1}.toast-close{background:transparent;border:none;color:inherit;cursor:pointer;font-size:.85rem;opacity:.7;padding:0 2px;flex-shrink:0}.toast-close:hover{opacity:1}.help-btn{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--text-secondary);background:transparent;color:var(--text-secondary);font-size:.75rem;font-weight:600;cursor:pointer;flex-shrink:0;transition:border-color .2s,color .2s;line-height:1;padding:0;margin-left:4px}.help-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.help-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.help-modal-overlay.hidden{display:none}.help-modal-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);padding:32px 36px;max-width:480px;width:90%;position:relative;box-shadow:0 8px 32px #0006}.help-modal-box h3{margin-top:0;margin-bottom:var(--spacing-md)}.help-modal-box h4{margin-top:var(--spacing-md);margin-bottom:var(--spacing-xs)}.help-modal-box p{color:var(--text-secondary);line-height:1.6;margin-bottom:var(--spacing-sm)}.help-modal-box ul{color:var(--text-secondary);margin-left:var(--spacing-md);line-height:1.8}.help-modal-close{position:absolute;top:12px;right:14px;background:transparent;border:none;color:var(--text-secondary);font-size:1rem;cursor:pointer;line-height:1;padding:2px 4px;border-radius:3px}.help-modal-close:hover{color:var(--text-primary);background:var(--bg-tertiary)}@media (max-width: 768px){.app-container{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border);flex-direction:row}.sidebar-header{display:none}.sidebar-sections{flex-direction:row;overflow-x:auto;width:100%;padding:var(--spacing-sm) 0}.sidebar-btn{flex:0 0 auto;white-space:nowrap;border-left:none;border-bottom:3px solid transparent}.sidebar-btn.active{border-left:none;border-bottom-color:var(--accent-primary)}.top-bar{flex-wrap:wrap;height:auto;padding:var(--spacing-sm)}.top-bar-left,.top-bar-right{width:100%;justify-content:space-between}.content-area{padding:var(--spacing-md)}.progress-steps{flex-wrap:wrap}.info-grid{grid-template-columns:1fr}}