*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.fixed{position:fixed}.sticky{position:sticky}.block{display:block}.flex{display:flex}.table{display:table}.grid{display:grid}.border{border-width:1px}.uppercase{text-transform:uppercase}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.transition{transition-property:color,background-color,border-color,text-decoration-color,fill,stroke,opacity,box-shadow,transform,filter,backdrop-filter;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}:root{--et-bg: #0d1117;--et-surface: #161b22;--et-surface2: #1e242d;--et-border: #30363d;--et-accent: #f7b731;--et-accent2: #2bbbad;--et-text: #e6edf3;--et-muted: #8b949e;--et-danger: #f85149;--et-success: #3fb950;--et-info: #58a6ff;--et-warning: #e3b341;--font-mono: "Share Tech Mono", monospace;--font-body: "Barlow", sans-serif;--font-display: "Barlow Condensed", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--et-bg);color:var(--et-text);font-family:var(--font-body);font-size:15px;line-height:1.6}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--et-surface)}::-webkit-scrollbar-thumb{background:var(--et-border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--et-muted)}input,select,textarea{background:var(--et-surface2);border:1px solid var(--et-border);color:var(--et-text);font-family:var(--font-body);font-size:14px;padding:8px 12px;border-radius:6px;outline:none;transition:border-color .15s;width:100%}input:focus,select:focus,textarea:focus{border-color:var(--et-accent)}select option{background:var(--et-surface2)}label{display:block;font-size:11px;font-weight:600;color:var(--et-muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:4px}.font-mono{font-family:var(--font-mono)}.font-display{font-family:var(--font-display)}.text-accent{color:var(--et-accent)}.text-accent2{color:var(--et-accent2)}.text-muted{color:var(--et-muted)}.text-success{color:var(--et-success)}.text-danger{color:var(--et-danger)}.text-info{color:var(--et-info)}.text-warning{color:var(--et-warning)}.et-card{background:var(--et-surface);border:1px solid var(--et-border);border-radius:10px;padding:1.25rem;transition:border-color .2s}.et-card:hover{border-color:#f7b73140}.et-card-title{font-family:var(--font-display);font-size:16px;font-weight:700;color:var(--et-text);text-transform:uppercase;letter-spacing:.5px;margin-bottom:1rem;display:flex;align-items:center;gap:8px}.et-card-title .icon{color:var(--et-accent);font-size:18px}.et-btn{width:100%;background:var(--et-accent);color:#0d1117;font-family:var(--font-display);font-size:14px;font-weight:700;letter-spacing:1px;text-transform:uppercase;border:none;border-radius:6px;padding:10px;cursor:pointer;transition:opacity .15s}.et-btn:hover{opacity:.88}.et-btn-outline{background:transparent;color:var(--et-accent);border:1px solid var(--et-accent)}.et-btn-outline:hover{background:#f7b73114;opacity:1}.et-btn-danger{background:transparent;color:var(--et-danger);border:1px solid var(--et-danger)}.result-box{background:var(--et-surface2);border:1px solid var(--et-border);border-radius:6px;padding:10px 14px;margin-top:10px;font-family:var(--font-mono);font-size:13px;min-height:44px}.result-row{display:flex;justify-content:space-between;align-items:center;padding:4px 0;border-bottom:1px solid var(--et-border)}.result-row:last-child{border-bottom:none}.result-label{color:var(--et-muted);font-size:12px}.result-value{color:var(--et-accent);font-weight:700;font-size:13px}.result-value.good{color:var(--et-success)}.result-value.warn{color:var(--et-warning)}.result-value.danger{color:var(--et-danger)}.result-value.info{color:var(--et-info)}.tab-row{display:flex;gap:4px;margin-bottom:12px;flex-wrap:wrap}.tab{font-size:12px;font-weight:500;color:var(--et-muted);background:var(--et-surface2);border:1px solid var(--et-border);border-radius:4px;padding:4px 12px;cursor:pointer;transition:all .15s;-webkit-user-select:none;-moz-user-select:none;user-select:none}.tab:hover{color:var(--et-text)}.tab.active{color:var(--et-accent);border-color:var(--et-accent);background:#f7b73114}.et-table{width:100%;font-size:12px;border-collapse:collapse}.et-table th{color:var(--et-muted);text-align:left;padding:5px 8px;border-bottom:1px solid var(--et-border);font-weight:600;text-transform:uppercase;letter-spacing:.5px;font-size:11px}.et-table td{padding:5px 8px;border-bottom:1px solid rgba(48,54,61,.5);font-family:var(--font-mono)}.et-table tr:hover td{background:var(--et-surface2)}.et-table .hl{color:var(--et-accent)}.formula-box{background:var(--et-surface2);border:1px solid var(--et-border);border-radius:6px;padding:8px 14px;font-family:var(--font-mono);font-size:13px;color:var(--et-accent2);text-align:center;margin-bottom:10px;letter-spacing:1px}.input-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}.input-grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-bottom:10px}.input-full{margin-bottom:10px}.badge{display:inline-block;font-size:11px;font-weight:600;padding:2px 8px;border-radius:4px;margin:2px 2px 2px 0;letter-spacing:.5px;text-transform:uppercase}.badge-iec{background:#58a6ff26;color:var(--et-info);border:1px solid rgba(88,166,255,.3)}.badge-ul{background:#f7b7311f;color:var(--et-accent);border:1px solid rgba(247,183,49,.3)}.badge-bs{background:#3fb9501f;color:var(--et-success);border:1px solid rgba(63,185,80,.3)}.badge-nec{background:#f851491f;color:var(--et-danger);border:1px solid rgba(248,81,73,.3)}.checklist-item{display:flex;align-items:center;gap:10px;padding:7px 0;border-bottom:1px solid rgba(48,54,61,.5);cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.checklist-item:last-child{border-bottom:none}.check-box{width:18px;height:18px;border:2px solid var(--et-border);border-radius:3px;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:all .15s;font-size:11px;font-weight:700;color:transparent}.checklist-item.checked .check-box{background:var(--et-success);border-color:var(--et-success);color:#0d1117}.check-text{font-size:13px;color:var(--et-text)}.checklist-item.checked .check-text{color:var(--et-muted);text-decoration:line-through}.section-header{margin-bottom:1.5rem}.section-title{font-family:var(--font-display);font-size:28px;font-weight:700;letter-spacing:.5px;display:flex;align-items:center;gap:10px}.section-desc{color:var(--et-muted);font-size:14px;margin-top:4px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}.tool-grid .span-2{grid-column:span 2}@media (max-width: 680px){.tool-grid .span-2{grid-column:span 1}.input-grid-2{grid-template-columns:1fr}.input-grid-3{grid-template-columns:1fr 1fr}}