/* CSS Variables */
:root {
  --color-bg: #fafafa;
  --color-surface: #fff;
  --color-border: #e5e5e5;
  --color-text: #111;
  --color-text-muted: #666;
  --color-primary: #111;
  --color-canvas-bg: #e5e5e5;

  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-success-text: #fff;
  --color-warning: #ca8a04;
  --color-warning-bg: #fefce8;

  --font-sans: system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, monospace;
  --radius: 4px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --header-height: 3rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111;
    --color-surface: #1a1a1a;
    --color-border: #333;
    --color-text: #e5e5e5;
    --color-text-muted: #999;
    --color-primary: #e5e5e5;
    --color-canvas-bg: #2a2a2a;

    --color-error: #f87171;
    --color-error-bg: #450a0a;
    --color-success: #4ade80;
    --color-success-bg: #052e16;
    --color-success-text: #052e16;
    --color-warning: #facc15;
    --color-warning-bg: #422006;
  }
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  height: var(--header-height);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

header a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

header form {
  display: inline;
}

header button {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 13px;
}

header button:hover {
  color: var(--color-text);
}

/* Main */
main {
  flex: 1;
  overflow-y: auto;
  scrollbar-gutter: stable;
  display: flex;
  flex-direction: column;
}

main > section {
  padding: var(--spacing-lg);
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  main > section {
    max-width: min(90%, 1400px);
  }
}

@media (min-width: 1600px) {
  main > section {
    max-width: 1400px;
    padding: var(--spacing-lg) var(--spacing-xl);
  }
}

/* Two-column layout with sticky left panel - full width */
#execution-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  align-items: start;
  max-width: none;
  width: 100%;
}

#panel-left {
  position: sticky;
  top: var(--spacing-lg);
  height: calc(100vh - var(--header-height) - var(--spacing-lg) * 2);
  display: flex;
  flex-direction: column;
  min-width: 0; /* Prevent grid column from expanding with content */
  container-type: inline-size;
  container-name: panel-left;
}

#panel-right {
  min-width: 0; /* Prevent grid column from expanding with content */
  container-type: inline-size;
  container-name: panel-right;
  height: calc(100vh - var(--header-height) - var(--spacing-lg) * 2);
  overflow-y: hidden; /* Scroll moved to .items-accordion */
  display: flex;
  flex-direction: column;
}

#panel-right h2 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

/* Back nav */
nav a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: var(--spacing-md);
}

nav a:hover {
  color: var(--color-text);
}

/* Headings */
h1 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* Forms */
form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

form > div {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

label {
  font-size: 13px;
  color: var(--color-text-muted);
}

input[type="text"],
input[type="password"],
input[type="file"] {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: var(--color-surface);
}

input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Buttons */
button {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text);
}

button:hover {
  background: var(--color-bg);
}

button[type="submit"] {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}

button[type="submit"]:hover {
  opacity: 0.9;
}

button.btn-success {
  background: var(--color-success);
  color: var(--color-success-text);
  border-color: var(--color-success);
}

button.btn-success:hover {
  background: var(--color-success-bg);
  color: var(--color-success);
}

button.btn-secondary {
  background: var(--color-border);
  color: var(--color-text);
  border-color: var(--color-border);
}

button.btn-secondary:hover {
  background: var(--color-surface);
  color: var(--color-text-muted);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Lists */
ul {
  list-style: none;
}

/* Execution list (unified) */
.execution-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Execution card (minimal mode for index page) */
.execution-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.15s ease;
}

.execution-card:hover {
  border-color: var(--color-primary);
}

.execution-card .execution-type {
  font-weight: 600;
}

.execution-card .execution-filename {
  color: var(--color-text-muted);
}

.execution-card .execution-time {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: auto;
}

.execution-card .execution-error {
  font-size: 12px;
  color: var(--color-error);
}

/* Legacy list styles */
ul > li {
  margin-bottom: var(--spacing-md);
}

article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
}

article header {
  height: auto;
  padding: 0;
  background: none;
  border: none;
  margin-bottom: var(--spacing-sm);
}

article header > div {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

article header > div:first-child a {
  font-weight: 600;
}

article header > div:last-child {
  gap: var(--spacing-xs);
}

article header > div:last-child button {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
}

/* Badges */
.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 500;
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-muted {
  background: var(--color-border);
  color: var(--color-text-muted);
}

/* Error paragraph */
article > p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

article > p:first-of-type:not(:last-of-type) {
  color: var(--color-error);
}

/* Details/Summary */
details {
  margin-top: var(--spacing-sm);
}

summary {
  font-size: 12px;
  color: var(--color-text-muted);
  cursor: pointer;
  user-select: none;
}

summary:hover {
  color: var(--color-text);
}

details[open] summary {
  margin-bottom: var(--spacing-sm);
}

/* Code blocks */
pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-sm);
  overflow: auto;
  max-height: 300px;
  font-size: 12px;
}

code {
  font-family: var(--font-mono);
}

/* Definition lists */
dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-xs) var(--spacing-md);
  font-size: 12px;
}

dt {
  color: var(--color-text-muted);
}

dd {
  font-family: var(--font-mono);
}

/* PDF Viewer */
.pdf-viewer {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.pdf-toolbar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.pdf-toolbar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.pdf-filename {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
}

.pdf-toolbar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.pdf-nav,
.pdf-zoom {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.pdf-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
  min-width: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
}

.pdf-btn:hover:not(:disabled) {
  background: var(--color-bg);
}

.pdf-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pdf-page-info,
.pdf-zoom-level {
  font-size: 12px;
  color: var(--color-text-muted);
  min-width: 50px;
  text-align: center;
}

.pdf-download-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
  color: var(--color-text);
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  white-space: nowrap;
}

.pdf-download-btn:hover {
  background: var(--color-bg);
}

.pdf-canvas-container {
  flex: 1;
  overflow: auto;
  padding: var(--spacing-md);
  background: var(--color-canvas-bg);
}

.pdf-viewer canvas {
  display: block;
  margin: 0 auto;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  background: white;
}

/* Toast notifications */
#toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 1000;
}

#toast-container > div {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-error);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  max-width: 400px;
}

#toast-container > div > div {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

#toast-container > div > div > span:first-child {
  font-weight: 500;
  font-size: 13px;
}

#toast-container > div > div > span:not(:first-child) {
  font-size: 12px;
  color: var(--color-text-muted);
}

#toast-container > div > button {
  padding: 0;
  border: none;
  background: none;
  font-size: 18px;
  line-height: 1;
  color: var(--color-text-muted);
}

#toast-container > div > button:hover {
  color: var(--color-text);
}

/* Error page */
section > p > a {
  color: var(--color-text);
}

/* Login page specific */
section:has(form[hx-post="/login"]) {
  max-width: 320px;
  margin: auto;
}

section:has(form[hx-post="/login"]) form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
}

/* Upload form */
form[hx-post="/files/"] {
  flex-direction: row;
  align-items: flex-end;
  gap: var(--spacing-md);
}

form[hx-post="/files/"] label {
  flex: 1;
}

/* Nested execution children */
ul ul {
  margin-left: var(--spacing-lg);
  margin-top: var(--spacing-md);
  padding-left: var(--spacing-md);
  border-left: 2px solid var(--color-border);
}

/* Dry run badge */
article header span:contains("Dry") {
  background: var(--color-warning);
  color: white;
}

/* Running status */
article:has(header span:first-of-type:empty) {
  border-left: 3px solid var(--color-warning);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* Execution Header */
.execution-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.execution-header h1 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

/* Execution Tree */
.execution-tree {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.tree-node {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tree-node:has(.badge-error) {
  border-left: 3px solid var(--color-error);
}

.tree-node:has(.badge-warning) {
  border-left: 3px solid var(--color-warning);
}

.tree-node-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  flex-wrap: wrap;
  cursor: pointer;
}

.tree-node-header-leaf {
  cursor: default;
}

.tree-node > details > summary {
  list-style: none;
}

.tree-node > details > summary::-webkit-details-marker {
  display: none;
}

.tree-node > details > summary::before {
  content: "\25B6";
  font-size: 10px;
  margin-right: var(--spacing-sm);
  transition: transform 0.15s ease;
  display: inline-block;
}

.tree-node > details[open] > summary::before {
  transform: rotate(90deg);
}

.tree-node-type a {
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

.tree-node-type a:hover {
  text-decoration: underline;
}

.tree-node-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.tree-node-actions form {
  display: inline;
  flex-direction: row;
}

.tree-node-time {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: auto;
}

.tree-node-error {
  font-size: 12px;
  color: var(--color-error);
  flex-basis: 100%;
  margin-top: var(--spacing-xs);
}

.tree-node-body {
  padding: 0 var(--spacing-md) var(--spacing-md);
}

.tree-children {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-md);
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.tree-node-items {
  margin-top: var(--spacing-sm);
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: var(--spacing-sm);
}

.tree-node-items summary {
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}

.tree-node-items pre {
  margin-top: var(--spacing-sm);
  max-height: 400px;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 11px;
}

/* Supplier Search Autocomplete */
.supplier-search {
  position: relative;
}

.supplier-search input[type="text"] {
  width: 100%;
  color: var(--color-text);
  background: var(--color-surface);
}

.supplier-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  max-height: 200px;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.supplier-results:empty {
  display: none;
}

.supplier-results li {
  margin: 0;
}

.supplier-results button {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: 0;
  background: none;
  text-align: left;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  color: var(--color-text);
}

.supplier-results button:hover,
.supplier-results button:focus {
  background: var(--color-bg);
}

.supplier-results .no-results {
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-muted);
  font-size: 13px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1001;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
  font-size: 16px;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
}

.modal-close:hover {
  color: var(--color-text);
}

.modal-body {
  flex: 1;
  overflow: hidden;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* JSON Editor */
.json-editor {
  width: 100%;
  min-height: 400px;
  max-height: 60vh;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
  tab-size: 2;
}

.json-editor:focus {
  outline: none;
  border-color: var(--color-primary);
}

.json-error {
  display: none;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--color-error-bg);
  color: var(--color-error);
  border-radius: var(--radius);
  font-size: 13px;
}

/* Wide modal variant for complex forms */
.modal-wide {
  max-width: 1000px;
}

/* Form grid layouts */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  max-width: 100%;
}

.form-grid-2col {
  grid-template-columns: repeat(2, 1fr);
}

.form-grid-3col {
  grid-template-columns: repeat(3, 1fr);
}

.form-grid-4col {
  grid-template-columns: repeat(4, 1fr);
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-group-2col {
  grid-column: span 2;
}

/* Form group styling */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--color-surface);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
}

/* Inline form fields */
.form-inline {
  display: flex;
  gap: var(--spacing-sm);
}

.form-inline input {
  flex: 1;
}

.form-inline input[maxlength="3"] {
  max-width: 80px;
  flex: none;
}

/* Items accordion */
.items-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.item-section {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.item-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

.item-header::-webkit-details-marker {
  display: none;
}

.item-header::before {
  content: "\25B6";
  font-size: 10px;
  transition: transform 0.15s;
}

details[open] > .item-header::before {
  transform: rotate(90deg);
}

.item-title {
  font-weight: 600;
}

.item-subtitle {
  color: var(--color-text-muted);
  font-size: 13px;
}

.item-body {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* Nested sections (fieldsets) */
.nested-section {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.nested-section legend {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 13px;
  font-weight: 500;
  padding: 0 var(--spacing-sm);
}

/* Array items container */
.array-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

/* Line item and shipment cards */
.line-item-card,
.shipment-card {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  padding-top: calc(var(--spacing-md) + 8px);
}

/* Remove button */
.btn-remove {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  background: transparent;
  border: none;
  color: var(--color-error);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
}

.btn-remove:hover {
  text-decoration: underline;
}

/* Add button */
.btn-add {
  margin-left: var(--spacing-sm);
  font-size: 12px;
}

/* oneOf fields */
.oneof-field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.oneof-selector {
  display: flex;
  gap: var(--spacing-md);
}

.oneof-selector label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text);
}

.oneof-variant {
  margin-top: var(--spacing-xs);
}

.oneof-variant[hidden] {
  display: none;
}

.text-muted {
  color: var(--color-text-muted);
  font-style: italic;
  font-size: 13px;
}

/* Nullable fields */
.nullable-fields {
  margin-top: var(--spacing-xs);
}

.nullable-fields[hidden] {
  display: none;
}

/* Nullable string inputs */
.nullable-input {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.label-with-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.label-with-toggle input[type="checkbox"] {
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.nullable-input input:disabled,
.nullable-input textarea:disabled {
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Execution Tabs */
.execution-tabs {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tab-nav {
  display: flex;
  gap: var(--spacing-xs);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-shrink: 0;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 14px;
  font-family: inherit;
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.active {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
  position: relative;
}

.tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-surface);
}

.tab-count {
  font-weight: normal;
  color: var(--color-text-muted);
}

.tab-panels {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.tab-loading,
.tab-empty,
.tab-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
  text-align: center;
}

.tab-error {
  color: var(--color-error);
}

.tab-error .error-message {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-error-bg);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  max-width: 100%;
  overflow-wrap: break-word;
}

.tab-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  flex: 1;
  min-height: 0;
}

.tab-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  overflow-x: hidden;
  max-width: 100%;
  flex: 1;
  min-height: 0;
}

.tab-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.panel-footer {
  position: sticky;
  bottom: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  margin-top: auto;
}

/* Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--spacing-md);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .form-grid,
  .form-grid-2col,
  .form-grid-3col,
  .form-grid-4col {
    grid-template-columns: 1fr;
  }

  .form-group-2col {
    grid-column: span 1;
  }

  .modal-wide {
    max-width: 95vw;
  }
}

/* Container queries for panel-right forms */
@container panel-right (min-width: 700px) {
  .form-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@container panel-right (max-width: 600px) {
  .form-grid-4col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@container panel-right (max-width: 500px) {
  .form-grid,
  .form-grid-2col,
  .form-grid-3col,
  .form-grid-4col {
    grid-template-columns: 1fr;
  }

  .form-group-2col {
    grid-column: span 1;
  }
}

@container panel-right (max-width: 400px) {
  .nested-section {
    padding: var(--spacing-sm);
  }

  .item-body {
    padding: var(--spacing-sm);
  }

  .item-header {
    padding: var(--spacing-sm);
  }
}

/* Container queries for panel-left (PDF viewer) */
@container panel-left (max-width: 350px) {
  .pdf-toolbar-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .pdf-nav,
  .pdf-zoom {
    justify-content: center;
  }
}

/* Adjust two-panel layout on medium screens */
@media (max-width: 1400px) {
  #execution-content {
    grid-template-columns: 0.8fr 1.2fr;
  }
}

@media (max-width: 1200px) {
  #execution-content {
    grid-template-columns: 0.7fr 1.3fr;
  }
}