/**
 * OptiNest Workspace Styles
 * Carbon Design System v11 (G100 Dark Theme)
 */

:root {
  /* Carbon G100 Tokens */
  --cds-background: #161616;
  --cds-layer-01: #262626;
  --cds-layer-02: #393939;
  --cds-layer-active-01: #474747;
  --cds-text-primary: #f4f4f4;
  --cds-text-secondary: #c6c6c6;
  --cds-text-helper: #8d8d8d;
  --cds-interactive: #0f62fe;
  --cds-interactive-hover: #0353e9;
  --cds-button-danger: #da1e28;
  --cds-button-danger-hover: #ba1b23;
  --cds-support-success: #24a148;
  --cds-focus: #ffffff;
  --cds-border-subtle: #393939;
  --cds-border-strong: #8d8d8d;
  
  /* Spacing Tokens */
  --cds-spacing-01: 0.125rem;
  --cds-spacing-02: 0.25rem;
  --cds-spacing-03: 0.5rem;
  --cds-spacing-04: 0.75rem;
  --cds-spacing-05: 1rem;
  --cds-spacing-06: 1.5rem;
  --cds-spacing-07: 2rem;

  /* Layout configuration */
  --header-height: 3rem;
  --footer-height: 2rem;
  --sidebar-width: 16rem;
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--cds-background);
  color: var(--cds-text-primary);
  height: 100vh;
  display: grid;
  grid-template-areas:
    "header header"
    "nav main"
    "footer footer";
  grid-template-rows: var(--header-height) 1fr var(--footer-height);
  grid-template-columns: var(--sidebar-width) 1fr;
  overflow: hidden;
}

/* Accessibility & Focus States */
:focus-visible {
  outline: 2px solid var(--cds-focus);
  outline-offset: -2px;
}

/* Header */
.cds-header {
  grid-area: header;
  background-color: var(--cds-background);
  border-bottom: 1px solid var(--cds-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--cds-spacing-05);
  height: var(--header-height);
}

.header-brand {
  font-weight: 600;
  letter-spacing: 0.1px;
}

/* Sidenav */
.cds-sidenav {
  grid-area: nav;
  background-color: var(--cds-layer-01);
  border-right: 1px solid var(--cds-border-subtle);
  padding: var(--cds-spacing-05) 0;
  display: flex;
  flex-direction: column;
}

.sidenav-group-title {
  font-size: 0.75rem;
  color: var(--cds-text-secondary);
  padding: 0 var(--cds-spacing-05);
  margin-bottom: var(--cds-spacing-03);
  text-transform: uppercase;
}

.sidenav-link {
  display: block;
  padding: var(--cds-spacing-03) var(--cds-spacing-05);
  color: var(--cds-text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background-color 0.15s ease;
}

.sidenav-link:hover,
.sidenav-link[aria-current="page"] {
  background-color: var(--cds-layer-02);
}

/* Main Workspace & Splitter */
.cds-main {
  grid-area: main;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

.panel-input,
.panel-output {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  padding: var(--cds-spacing-05);
  background-color: var(--cds-background);
}

.panel-input {
  flex: 0 0 50%;
  min-width: 300px;
}

.panel-output {
  flex: 1;
  min-width: 300px;
}

.splitter {
  width: 4px;
  background-color: var(--cds-border-subtle);
  cursor: col-resize;
  transition: background-color 0.15s ease;
  z-index: 10;
}

.splitter:hover,
.splitter.is-dragging {
  background-color: var(--cds-interactive);
}

/* Forms & Inputs */
.cds-form-item {
  margin-bottom: var(--cds-spacing-05);
}

.cds-label {
  display: block;
  font-size: 0.75rem;
  color: var(--cds-text-secondary);
  margin-bottom: var(--cds-spacing-02);
}

.cds-text-input {
  width: 100%;
  background-color: var(--cds-layer-01);
  border: none;
  border-bottom: 1px solid var(--cds-border-strong);
  color: var(--cds-text-primary);
  padding: var(--cds-spacing-03) var(--cds-spacing-04);
  font-family: inherit;
  font-size: 0.875rem;
  transition: background-color 0.15s ease;
}

.cds-text-input:focus {
  outline: 2px solid var(--cds-focus);
  outline-offset: -2px;
  background-color: var(--cds-layer-02);
}

/* Buttons */
.cds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--cds-spacing-03) var(--cds-spacing-05);
  font-family: inherit;
  font-size: 0.875rem;
  cursor: pointer;
  border: none;
  transition: background-color 0.15s ease;
}

.cds-btn--primary {
  background-color: var(--cds-interactive);
  color: #fff;
}

.cds-btn--primary:hover {
  background-color: var(--cds-interactive-hover);
}

.cds-btn--danger {
  background-color: transparent;
  color: var(--cds-button-danger);
  padding: var(--cds-spacing-02) var(--cds-spacing-03);
}

.cds-btn--danger:hover {
  background-color: var(--cds-button-danger);
  color: #fff;
}

/* File Drag & Drop Zone */
.file-drop-zone {
  border: 1px dashed var(--cds-border-strong);
  padding: var(--cds-spacing-06);
  text-align: center;
  background-color: var(--cds-layer-01);
  margin-bottom: var(--cds-spacing-05);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.file-drop-zone.drag-active {
  background-color: var(--cds-layer-02);
  border-color: var(--cds-interactive);
}

/* Editable Data Table */
.cds-data-table-container {
  overflow-x: auto;
  margin-bottom: var(--cds-spacing-05);
}

.cds-data-table {
  width: 100%;
  border-collapse: collapse;
}

.cds-data-table th,
.cds-data-table td {
  padding: var(--cds-spacing-03) var(--cds-spacing-04);
  text-align: left;
  border-bottom: 1px solid var(--cds-border-subtle);
  font-size: 0.875rem;
}

.cds-data-table th {
  background-color: var(--cds-layer-01);
  color: var(--cds-text-secondary);
  font-weight: 600;
}

.cds-data-table td .table-input {
  width: 100px;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--cds-text-primary);
  font-family: inherit;
  font-size: 0.875rem;
}

.cds-data-table td .table-input:focus {
  border-bottom: 1px solid var(--cds-interactive);
  outline: none;
  background-color: var(--cds-layer-02);
}

/* Output Console */
.console-output {
  flex: 1;
  background-color: var(--cds-layer-01);
  border: 1px solid var(--cds-border-subtle);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  padding: var(--cds-spacing-04);
  overflow-y: auto;
  white-space: pre-wrap;
  margin-bottom: var(--cds-spacing-05);
}

/* Footer */
.cds-footer {
  grid-area: footer;
  background-color: var(--cds-layer-01);
  border-top: 1px solid var(--cds-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--cds-spacing-05);
  font-size: 0.75rem;
  color: var(--cds-text-secondary);
}

.status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--cds-support-success);
  margin-right: var(--cds-spacing-02);
}

/* Typography headings */
h2 {
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: var(--cds-spacing-05);
}