html, body {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
    font-size: 12px;
    background: #edf2f6;
    color: #1f2933;
  }

  .topMainContainer {
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
  }

  .faultStudyShell {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
    --fault-stage-padding: 1rem;
    --fault-inspector-width: 380px;
    --fault-drawer-tab-size: 2.75rem;
    --fault-inspector-peek-size: 5rem;
  }

  .app-header{
    position: sticky;
    top: 0;
    z-index: 40;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    column-gap: 14px;
    row-gap: 8px;
    padding: 10px 18px;
    border-bottom: 1px solid #d4dde5;
    background: rgba(237, 242, 246, 0.92);
    backdrop-filter: blur(10px);
  }

  .app-logo-area {
    display: flex;
    align-items: center;
    width: max-content;
  }

  .app-logo-area > a,
  .app-logo-area > a:visited,
  .app-logo-area > a:hover,
  .app-logo-area > a:active {
    color: inherit;
    text-decoration: none;
  }

  .brand{
    display:flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    justify-self: center;
    align-items: center;
    text-align: center;
  }

  .brand__title{
    font-size: 32px;
    font-weight: 650;
    line-height: 1.1;
    color: #102a43;
  }

  .brand__subtitle{
    font-size: 18px;
    color: #62788c;
    margin-top: 0;
    line-height: 1.2;
  }

  .toolbar{
    display:flex;
    gap: 8px;
    align-items:center;
    justify-self: end;
    justify-content: flex-end;
    flex-wrap: nowrap;
    min-width: 0;
  }

  .faultHeaderMeta {
    display: inline-flex;
    align-items: center;
    max-width: min(100%, 34rem);
    min-width: 0;
    padding: 0.5rem 0.85rem;
    border: 1px solid #d4dde5;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    color: #52606d;
    font-size: 0.82rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .faultToolbar {
    padding: 0.55rem 1rem 0;
  }

  .faultToolbarRow {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) minmax(420px, 1.45fr);
    gap: 0.75rem;
    align-items: stretch;
  }

  .faultToolbarBlock,
  .faultWorkspacePanel,
  .inspectorSection {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid #d4dde5;
    border-radius: 16px;
    box-shadow: 0 10px 28px rgba(24, 39, 75, 0.08);
  }

  .faultToolbarBlock {
    padding: 0.65rem 0.9rem 0.75rem;
    display: grid;
    gap: 0.5rem;
    min-height: 100%;
  }

  .toolbarBlockHeader{
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.18rem 0.55rem;
  }

  .panelHeading {
    display: grid;
    gap: 0.18rem;
  }

  .toolbarBlockHeader h2,
  .panelHeading h2 {
    margin: 0;
    font-size: 1rem;
    line-height: 1.15;
    color: #102a43;
  }

  .toolbarBlockHeader p{
    margin: 0;
    color: #62788c;
    font-size: 0.74rem;
    line-height: 1.15;
  }

  .panelHeading p {
    margin: 0;
    color: #62788c;
    font-size: 0.78rem;
    line-height: 1.3;
  }

  .panelHeading {
    padding: 0.8rem 1rem 0.65rem;
    border-bottom: 1px solid #dbe4eb;
    background: linear-gradient(180deg, #fbfdff 0%, #eef4f8 100%);
  }

  .panelHeading--compact {
    padding-bottom: 0.55rem;
  }

  .toolbarStudyInputs table {
    width: 100%;
  }

  .toolbarStudyInputs tbody {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 0.85rem;
  }

  .toolbarStudyInputs tr {
    display: grid;
    grid-template-columns: auto auto;
    align-items: center;
    gap: 0.35rem;
  }

  .toolbarStudyInputs td:first-child {
    font-weight: 600;
    color: #334e68;
  }

  .faultShellStage {
    position: relative;
    flex: 1 1 auto;
    min-height: 0;
    padding: 1rem;
    isolation: isolate;
  }

  .faultStageBase {
    position: relative;
    min-height: 100%;
  }

  .faultWorkspacePanel {
    min-height: 0;
    overflow: hidden;
    display: grid;
    grid-template-rows: auto 1fr;
  }

  .faultWorkspacePanel--singleline {
    min-height: 100%;
  }

  .faultSingleLineCanvas {
    min-height: 0;
    padding: 0.65rem 0.85rem 0.9rem;
    display: flex;
  }

  .faultWorkspacePanel--singleline #divSingleLine {
    min-height: clamp(28rem, 60vh, 50rem);
  }

  .faultOverlayDrawer {
    position: absolute;
    z-index: 20;
    pointer-events: none;
    transition: transform 0.28s ease;
  }

  .faultOverlayDrawerSurface,
  .faultDrawerEdgeToggle {
    pointer-events: auto;
  }

  .faultOverlayDrawerSurface {
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid #d4dde5;
    border-radius: 18px;
    box-shadow: 0 18px 36px rgba(24, 39, 75, 0.16);
    overflow: hidden;
  }

  .faultOverlayDrawerSurface--inspector {
    height: 100%;
    display: grid;
    grid-template-rows: auto 1fr;
  }

  .faultOverlayDrawer--inspector {
    top: 1rem;
    right: 1rem;
    bottom: 1rem;
    width: var(--fault-inspector-width);
  }

  .faultStudyShell[data-inspector-mode="open"] .faultOverlayDrawer--inspector {
    transform: translateX(0);
  }

  .faultStudyShell[data-inspector-mode="peek"] .faultOverlayDrawer--inspector {
    transform: translateX(calc(100% - var(--fault-inspector-peek-size)));
  }

  .faultStudyShell[data-inspector-mode="closed"] .faultOverlayDrawer--inspector {
    transform: translateX(calc(100% - var(--fault-drawer-tab-size)));
  }

  .panelHeading--drawer {
    padding-right: 1.35rem;
  }

  .faultDrawerEdgeToggle {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    border: 1px solid #9cb8c8;
    background: rgba(255, 255, 255, 0.98);
    color: #184a5d;
    box-shadow: 0 8px 18px rgba(24, 39, 75, 0.14);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  }

  .faultDrawerEdgeToggle:hover {
    border-color: #1f6f8b;
    color: #1f6f8b;
  }

  .faultDrawerEdgeToggle::after {
    content: "";
    width: 0.48rem;
    height: 0.48rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transition: transform 0.2s ease;
  }

  .faultDrawerEdgeToggleLabel {
    font-weight: 700;
    letter-spacing: 0.02em;
  }

  .faultDrawerEdgeToggle--inspector {
    left: calc(-1 * var(--fault-drawer-tab-size) + 4px);
    top: 1.25rem;
    width: var(--fault-drawer-tab-size);
    min-height: 8.8rem;
    padding: 0.7rem 0.45rem;
    border-radius: 14px 0 0 14px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }

  .faultStudyShell[data-inspector-mode="open"] .faultDrawerEdgeToggle--inspector::after {
    transform: rotate(-45deg);
  }

  .faultStudyShell[data-inspector-mode="peek"] .faultDrawerEdgeToggle--inspector::after,
  .faultStudyShell[data-inspector-mode="closed"] .faultDrawerEdgeToggle--inspector::after {
    transform: rotate(135deg);
  }

  .faultInspectorPanel {
    min-height: 0;
    align-content: start;
    overflow: auto;
    padding: 1rem;
  }

  .faultInspectorAccordion {
    display: block;
  }

  .faultInspectorAccordion.ui-accordion {
    font-family: inherit;
    background: transparent;
    border: none;
  }

  .inspectorAccordionGroup + .inspectorAccordionGroup {
    margin-top: 0.9rem;
  }

  .faultInspectorAccordion .ui-sortable-placeholder {
    visibility: visible !important;
    min-height: 3rem;
    border: 1px dashed #8db2c1;
    border-radius: 14px;
    background: rgba(31, 111, 139, 0.08);
  }

  .inspectorAccordionGroup {
    overflow: hidden;
    border: 1px solid #d4dde5;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 24px rgba(24, 39, 75, 0.08);
  }

  .inspectorAccordionHeader {
    margin: 0;
    padding: 0.7rem 0.9rem 0.75rem;
    display: grid;
    gap: 0.12rem;
    border: none;
    border-bottom: 1px solid #dbe4eb;
    background: linear-gradient(180deg, #fbfdff 0%, #eef4f8 100%);
    color: #102a43;
    cursor: move;
  }

  .faultInspectorAccordion .ui-accordion-header {
    border-radius: 16px 16px 0 0;
  }

  .faultInspectorAccordion .ui-accordion-header-active {
    border-bottom-color: #dbe4eb;
  }

  .faultInspectorAccordion .ui-accordion-header-collapsed {
    border-bottom-color: transparent;
  }

  .faultInspectorAccordion .ui-accordion-header:focus {
    outline: 2px solid #8db2c1;
    outline-offset: -2px;
  }

  .inspectorAccordionTitle {
    font-size: 0.96rem;
    font-weight: 700;
    line-height: 1.15;
  }

  .inspectorAccordionMeta {
    font-size: 0.72rem;
    line-height: 1.2;
    color: #62788c;
  }

  .faultInspectorAccordion .ui-accordion-content {
    padding: 0;
    border: none;
    background: transparent;
    overflow: hidden;
  }

  .inspectorAccordionPanel {
    min-height: 0;
  }

  .inspectorAccordionPanelBody {
    min-height: 0;
    overflow: auto;
    padding: 0.8rem 0.95rem 1rem;
    display: grid;
    place-items: center;
  }

  .inspectorAccordionPanelBody--line {
    height: 9.5rem;
  }

  .inspectorAccordionPanelBody--network {
    height: 15rem;
  }

  .inspectorAccordionPanelBody--summary {
    height: 15.5rem;
    display: block;
    padding: 0;
  }

  .inspectorAccordionPanelBody--workspace {
    height: 12rem;
  }

  .inspectorSection {
    overflow: hidden;
    display: grid;
    grid-template-rows: auto 1fr;
  }

  .inspectorSectionBody {
    min-height: 0;
    padding: 0.8rem 0.95rem 1rem;
    display: grid;
    place-items: center;
  }

  .faultInspectorSummary {
    display: grid;
    gap: 0.75rem;
    padding: 0 0.95rem 1rem;
  }

  .faultInspectorAlert {
    margin: 0.8rem 0.95rem 0;
    padding: 0.7rem 0.85rem;
    border: 1px solid #c62828;
    border-radius: 8px;
    font-size: 0.82rem;
  }

  .faultWorkspacePanel--singleline .view-container {
    min-height: 0;
    height: 100%;
  }

  table {
    /* width: 100%; makes the table take the full width of the div */
    border-collapse: collapse; /* collapses cell borders */
  }

  table th, table td {
      padding: 0px; /* or your preferred padding */
      text-align: center;
      margin: 0px;
      border:none; /* optional border */
  }

  .scrollable-div {
    overflow-y: auto;
    display: block;
  }

  .input-container {
    align-items: center;
  }

  .input-container label {
    text-align: right;
  }
  #svg-container, #divSingleLine {
    display: flex;
    width: 100%;
    height: 100%;
    overflow: hidden;
    justify-content: center;
    text-align: center;
    border: none;
  }


  #input-fields, #inputsTopRight,#input-fields1, #inputsTopLeftProtectedLine {
    display: grid;
    place-items: center; 
  }

  .flash {
    opacity: 1;
    transition: opacity 0.5s linear;
    animation: flash-animation 1s infinite;
    animation-fill-mode: forwards;
    font-size: 2rem;
    display: block;
  }
  
  @keyframes flash-animation {
    0%, 50%, 100% { opacity: 1; }
    25%, 75% { opacity: 0; }
  }

  .V, .I{
    cursor: pointer
  }

  .tooltip {
    position: absolute;
    display: grid;
    place-items: center;
    font-size: 1rem;
    margin: 0;
    padding: 0;
    background-color: #fff;
    border: 0.5px solid black;
  }
  
  .tooltipUnderlined {
    position: absolute;
    display: grid;
    place-items: center;
    font-size: 1rem;
    margin: 0;
    padding: 0;
    text-decoration: underline;
    background-color: #fff;
    border: 0.5px solid black;
  }

  .button-container {
    perspective: 600px;
  }

  .faultTypeOption {
    gap: 0.2rem;
  }

  .checkboxFaultTypeGroup {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
  }

  .checkboxFaultTypeGroup .labelButton {
    margin-right: 0.1rem;
  }

  .faultTypeSelection {
    cursor: pointer;
  }

  .faultTypeSelection:disabled {
    cursor: not-allowed;
  }

  .faultTypeSelection:disabled + label {
    opacity: 0.55;
    cursor: not-allowed;
  }

  #faultWorkflowStatus {
    min-height: 0;
    margin: 0;
    font-size: 0.78rem;
    color: #4b5563;
  }

  .view-container {
    display: grid;
    grid-template-rows: auto 1fr;
    min-height: 0;
  }

  .faultViewTabs {
    display: flex;
    gap: 0.4rem;
    align-items: center;
    padding: 0.5rem 0.65rem;
    border-bottom: 1px solid #d7dee5;
    background: linear-gradient(180deg, #f8fafb 0%, #eef3f7 100%);
  }

  .faultViewTab {
    border: 1px solid #bac7d1;
    background: #ffffff;
    color: #31404d;
    border-radius: 999px;
    padding: 0.3rem 0.8rem;
    cursor: pointer;
    font-size: 0.82rem;
  }

  .faultViewTab.is-active {
    background: #1f6f8b;
    border-color: #1f6f8b;
    color: #ffffff;
  }

  .faultViewPanel {
    min-height: 0;
  }

  #impedance-view-panel,
  #sequence-view-panel {
    padding: 0.8rem;
    overflow: auto;
    background: linear-gradient(180deg, #fbfdff 0%, #f3f7fa 100%);
  }

  .faultViewSummary {
    display: grid;
    gap: 0.8rem;
  }

  .faultViewCard {
    border: 1px solid #d7dee5;
    border-radius: 8px;
    background-color: #ffffff;
    padding: 0.75rem;
  }

  .faultViewCard h4 {
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
    color: #1f2933;
  }

  .faultViewCard table {
    width: 100%;
  }

  tr[data-derived="true"] td {
    background-color: #f5f8fb;
  }

  tr[data-row-read-only="true"] td {
    background-color: #eef3f7;
    color: #536271;
  }

  tr[data-row-read-only="true"] td:first-child {
    font-weight: 600;
  }

  input[data-read-only="true"] {
    background-color: #f3f6f8;
    color: #5b6670;
    border: 1px solid #c5d0d9;
    cursor: default;
  }

  input[data-read-only="true"]:focus {
    outline: none;
    box-shadow: none;
  }

  th[data-table-mode-toggle],
  th[data-complex-header="summary"][role="button"] {
    cursor: pointer;
    user-select: none;
  }

  th[data-table-mode-toggle]:hover,
  th[data-complex-header="summary"][role="button"]:hover {
    color: #1f6f8b;
  }

  .faultViewEmpty {
    border: 1px dashed #a9b8c3;
    border-radius: 8px;
    padding: 1rem;
    background-color: rgba(255,255,255,0.85);
    color: #52606d;
  }

  #toggleButton {
    border: none;
    min-width: 82px;
    height: auto;
    background-color: #ccc;
    border-radius: 5px; /* slightly rounded corners */
    cursor: pointer;
    outline: none;
    font-size: 0.8rem;
    color: white;
    transition: transform 0.3s, background-color 0.3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2); /* subtle shadow for more depth */
  }

  #toggleButton:hover{
    background-color: #615454;
  }

  #toggleButton.on {
    background-color: rgb(45, 201, 45);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  }
  #toggleButton.on:hover {
    background-color: rgb(24, 129, 24);
  }  

  tr[data-invalid="true"] td {
    background-color: #fff1f0;
  }

  input[data-invalid="true"] {
    border: 1px solid #c62828;
    background-color: #fff7f7;
  }

  #pathFaultStrike {
    cursor:pointer;
  }

  #fieldsets,
  #fieldsetsImpedances,
  #fieldsetsTransition {
    display: grid;
    gap: 0.65rem;
  }

  #fieldsets {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #fieldsetsImpedances {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #fieldsetsTransition {
    grid-template-columns: minmax(0, 1fr);
  }

  #fieldsets fieldset,
  #fieldsetsImpedances fieldset,
  #fieldsetsTransition fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: none;
  }

  @media (max-width: 1320px) {
    .app-header {
      grid-template-columns: 1fr;
      justify-items: start;
    }

    .toolbar {
      justify-self: stretch;
      justify-content: flex-start;
      flex-wrap: wrap;
    }

    .faultToolbarRow {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }

  @media (max-width: 1080px) {
    .brand__title {
      font-size: 28px;
    }

    .brand__subtitle {
      font-size: 16px;
    }

    .faultToolbar {
      padding: 0.75rem 0.75rem 0;
    }

    .faultToolbarRow {
      grid-template-columns: 1fr;
    }

    .faultStudyShell {
      --fault-inspector-width: min(30rem, calc(100vw - 1.5rem));
    }

    .faultShellStage {
      padding: 0.75rem;
    }

    .faultStageBase,
    .faultWorkspacePanel--singleline {
      min-height: calc(100vh - 18rem);
    }
  }

  @media (max-width: 760px) {
    .app-header {
      padding: 10px 12px;
    }

    .brand {
      align-items: flex-start;
      text-align: left;
    }

    .brand__title {
      font-size: 24px;
    }

    .brand__subtitle {
      font-size: 14px;
    }

    .faultHeaderMeta {
      max-width: 100%;
    }

    .faultToolbarBlock,
    .faultWorkspacePanel,
    .inspectorSection,
    .faultOverlayDrawerSurface {
      border-radius: 12px;
    }

    .faultStudyShell {
      --fault-inspector-width: calc(100vw - 1rem);
      --fault-inspector-peek-size: 4.25rem;
    }

    .faultShellStage {
      padding: 0.5rem;
    }

    .faultWorkspacePanel--singleline #divSingleLine {
      min-height: clamp(22rem, 54vh, 36rem);
    }

    .faultViewTabs,
    .checkboxFaultTypeGroup {
      align-items: flex-start;
    }

    .faultOverlayDrawer--inspector {
      top: 0.5rem;
      right: 0.5rem;
      bottom: 0.5rem;
    }

    #fieldsets,
    #fieldsetsImpedances {
      grid-template-columns: minmax(0, 1fr);
    }
  }