/* Theme, spacing, typography, and component geometry. */
:root {
  color-scheme: light;
  --header-bg: #f3f6f9;
  --header-panel: #ffffff;
  --header-soft: #f7f9fc;
  --header-control: #ffffff;
  --header-border: #cbd5e1;
  --header-text: #172033;
  --header-muted: #5b677a;
  --header-primary: #0969da;
  --header-primary-hover: #0757b8;
  --header-info-bg: #e8f4ff;
  --header-info-border: #8cc8ff;
  --header-critical: #b42318;
  --header-critical-bg: #fff0ee;
  --header-critical-border: #f3aaa3;
  --header-warning: #8a5200;
  --header-warning-bg: #fff8e5;
  --header-warning-border: #e4b341;
  --header-info: #0969da;
  --header-info-soft: #e8f4ff;
  --header-success: #137333;
  --header-success-bg: #eaf7ed;
  --header-success-border: #8bd39b;
  --header-on-primary: #fff;
  --header-focus-ring: color-mix(in srgb, var(--header-primary) 42%, transparent);
  --header-code: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --header-space-1: 6px;
  --header-space-2: 8px;
  --header-space-3: 10px;
  --header-space-4: 12px;
  --header-space-5: 14px;
  --header-space-6: 16px;
  --header-space-7: 18px;
  --header-space-8: 20px;
  --header-radius: 10px;
  --header-radius-small: 8px;
  --header-radius-notice: 9px;
  --header-radius-pill: 999px;
  --header-control-radius: 7px;
  --header-content-max-width: 1240px;
  --header-page-gutter: 32px;
  --header-page-gutter-mobile: 20px;
  --header-control-height: 42px;
  --header-button-height: 38px;
  --header-copy-button-height: 30px;
  --header-checkbox-size: 18px;
  --header-input-height: 240px;
  --header-output-height: 220px;
  --header-editor-line-height: 1.55;
  --header-focus-width: 3px;
  --header-focus-offset: 2px;
  --header-disabled-opacity: .55;
  --header-summary-value-size: 1.25rem;
  --header-list-indent: 1.4rem;
  --header-section-gap: 24px;
  --header-setting-mode-min: 220px;
  --header-setting-url-min: 300px;
  --header-theme-control-min: 110px;
  --header-theme-control-max: 150px;
  --header-filter-min: 150px;
  --header-filter-search-min: 240px;
  --header-table-min-width: 960px;
  --header-table-value-max-width: 340px;
  --header-font-size-badge: .75rem;
  --header-font-size-copy: .78rem;
  --header-font-size-meta: .82rem;
  --header-font-size-small: .85rem;
  --header-font-size-table: .86rem;
  --header-font-size-support: .87rem;
  --header-font-size-breadcrumb: .9rem;
  --header-font-size-finding-title: .94rem;
  --header-font-size-section: 1rem;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --header-bg: #0d1117;
  --header-panel: #161b22;
  --header-soft: #1f2630;
  --header-control: #1f2630;
  --header-border: #46505f;
  --header-text: #f0f3f6;
  --header-muted: #a7b0bf;
  --header-primary: #2f81f7;
  --header-primary-hover: #58a6ff;
  --header-info-bg: #102b46;
  --header-info-border: #266aa8;
  --header-critical: #ff7b72;
  --header-critical-bg: #3b1c1d;
  --header-critical-border: #8e3e43;
  --header-warning: #e3b341;
  --header-warning-bg: #32270d;
  --header-warning-border: #7d641c;
  --header-info: #58a6ff;
  --header-info-soft: #102b46;
  --header-success: #56d364;
  --header-success-bg: #173521;
  --header-success-border: #357a46;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none;
}

/* Page shell, navigation, notices, and panels. */
body.header-analyzer-page {
  margin: 0;
  background: var(--header-bg);
  color: var(--header-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

.header-analyzer-main {
  width: min(var(--header-content-max-width), calc(100% - var(--header-page-gutter)));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.header-analyzer-page-header {
  margin-bottom: var(--header-space-6);
}

.header-analyzer-page-header h1 {
  margin: var(--header-space-2) 0 4px;
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1.35;
}

.header-analyzer-page-header p,
.header-analyzer-panel-heading p {
  margin: 4px 0 0;
  color: var(--header-muted);
}

.header-analyzer-breadcrumb {
  display: flex;
  gap: var(--header-space-2);
  align-items: center;
  font-size: var(--header-font-size-breadcrumb);
}

.header-analyzer-breadcrumb a {
  color: var(--header-primary);
}

.header-analyzer-settings,
.header-analyzer-field,
.header-analyzer-theme,
.header-analyzer-summary,
.header-analyzer-filters,
.header-analyzer-finding-list,
.header-analyzer-about-grid {
  display: grid;
}

.header-analyzer-options,
.header-analyzer-actions,
.header-analyzer-finding-heading {
  display: flex;
  flex-wrap: wrap;
}

.header-analyzer-notice,
.header-analyzer-privacy {
  border: 1px solid var(--header-info-border);
  background: var(--header-info-bg);
  color: var(--header-info);
}

.header-analyzer-notice {
  margin-bottom: var(--header-space-6);
  padding: var(--header-space-4) var(--header-space-5);
  border-radius: var(--header-radius-notice);
}

.header-analyzer-panel {
  margin-bottom: var(--header-space-6);
  padding: var(--header-space-7);
  border: 1px solid var(--header-border);
  border-radius: var(--header-radius);
  background: var(--header-panel);
}

.header-analyzer-panel-heading {
  margin-bottom: var(--header-space-6);
}

.header-analyzer-panel-heading h2,
.header-analyzer-about h2 {
  margin: 0;
  font-size: 1.15rem;
}

.header-analyzer-panel-heading--row {
  display: flex;
  justify-content: space-between;
  gap: var(--header-space-6);
  align-items: flex-start;
}

/* Input controls, options, and actions. */
.header-analyzer-settings {
  grid-template-columns: minmax(var(--header-setting-mode-min), .8fr) minmax(var(--header-setting-url-min), 1.2fr);
  gap: var(--header-space-4);
  margin-bottom: var(--header-space-5);
}

.header-analyzer-field {
  gap: var(--header-space-1);
  font-weight: 600;
  margin-bottom: var(--header-space-5);
}

.header-analyzer-field--flush {
  margin-bottom: 0;
}

.header-analyzer-theme {
  grid-template-columns: auto minmax(var(--header-theme-control-min), var(--header-theme-control-max));
  gap: var(--header-space-1);
  align-items: center;
  font-weight: 600;
}

.header-analyzer-control {
  width: 100%;
  min-height: var(--header-control-height);
  padding: 9px 11px;
  border: 1px solid var(--header-border);
  border-radius: var(--header-control-radius);
  background: var(--header-control);
  color: var(--header-text);
  font: inherit;
}

.header-analyzer-input {
  min-height: var(--header-input-height);
  max-height: var(--header-input-height);
  resize: none;
  font-family: var(--header-code);
  line-height: var(--header-editor-line-height);
  white-space: pre;
  overflow: auto;
}

.header-analyzer-input.is-dragging {
  border-color: var(--header-primary);
  background: var(--header-info-bg);
}

.header-analyzer-control:focus,
.header-analyzer-button:focus-visible,
.header-analyzer-table-copy:focus-visible,
.header-analyzer-normalized summary:focus-visible {
  outline: var(--header-focus-width) solid var(--header-focus-ring);
  outline-offset: var(--header-focus-offset);
}

.header-analyzer-options,
.header-analyzer-actions {
  gap: var(--header-space-2) var(--header-space-5);
  align-items: center;
}

.header-analyzer-options {
  margin-bottom: var(--header-space-5);
}

.header-analyzer-check {
  display: inline-flex;
  align-items: center;
  gap: var(--header-space-1);
}

.header-analyzer-check input {
  width: var(--header-checkbox-size);
  height: var(--header-checkbox-size);
  accent-color: var(--header-primary);
}

.header-analyzer-actions--compact {
  justify-content: flex-end;
}

.header-analyzer-button,
.header-analyzer-table-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--header-button-height);
  padding: 7px 13px;
  border: 1px solid var(--header-border);
  border-radius: var(--header-control-radius);
  background: var(--header-soft);
  color: var(--header-text);
  font: inherit;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

.header-analyzer-table-copy {
  min-height: var(--header-copy-button-height);
  padding: 3px 9px;
  font-size: var(--header-font-size-copy);
  white-space: nowrap;
}

.header-analyzer-button:hover:not(:disabled),
.header-analyzer-table-copy:hover {
  border-color: var(--header-primary);
  color: var(--header-primary);
}

.header-analyzer-button--primary {
  border-color: var(--header-primary);
  background: var(--header-primary);
  color: var(--header-on-primary);
}

.header-analyzer-button--primary:hover:not(:disabled) {
  background: var(--header-primary-hover);
  color: var(--header-on-primary);
}

.header-analyzer-button:disabled {
  opacity: var(--header-disabled-opacity);
  cursor: not-allowed;
}

.header-analyzer-shortcut {
  margin-inline-start: auto;
  color: var(--header-muted);
  font-size: var(--header-font-size-small);
}

.header-analyzer-message,
.header-analyzer-context-warning {
  margin: var(--header-space-5) 0 0;
  padding: var(--header-space-3) var(--header-space-4);
  border-inline-start: 4px solid var(--header-message-color, var(--header-primary));
  background: var(--header-soft);
  color: var(--header-message-color, var(--header-text));
}

.header-analyzer-message[data-type="success"] {
  --header-message-color: var(--header-success);
}

.header-analyzer-message[data-type="warning"],
.header-analyzer-context-warning {
  --header-message-color: var(--header-warning);
}

.header-analyzer-message[data-type="error"] {
  --header-message-color: var(--header-critical);
}

/* Summary, filters, header table, and diagnostic findings. */
.header-analyzer-summary {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--header-space-3);
  margin: 0 0 var(--header-space-6);
}

.header-analyzer-summary > div {
  padding: var(--header-space-4);
  border: 1px solid var(--header-border);
  border-radius: var(--header-radius-small);
  background: var(--header-soft);
}

.header-analyzer-summary dt {
  color: var(--header-muted);
  font-size: var(--header-font-size-meta);
}

.header-analyzer-summary dd {
  margin: 2px 0 0;
  font-size: var(--header-summary-value-size);
  font-weight: 750;
}

.header-analyzer-summary [data-severity="critical"] dd {
  color: var(--header-critical);
}

.header-analyzer-summary [data-severity="warning"] dd {
  color: var(--header-warning);
}

.header-analyzer-summary [data-severity="info"] dd {
  color: var(--header-info);
}

.header-analyzer-filters {
  grid-template-columns: repeat(3, minmax(var(--header-filter-min), .65fr)) minmax(var(--header-filter-search-min), 1.2fr);
  gap: var(--header-space-4);
  margin-bottom: var(--header-space-6);
}

.header-analyzer-result-section + .header-analyzer-result-section {
  margin-top: var(--header-section-gap);
}

.header-analyzer-result-heading {
  display: flex;
  justify-content: space-between;
  gap: var(--header-space-4);
  align-items: baseline;
  margin-bottom: var(--header-space-2);
}

.header-analyzer-result-heading h3 {
  margin: 0;
  font-size: var(--header-font-size-section);
}

.header-analyzer-result-heading span {
  color: var(--header-muted);
  font-size: var(--header-font-size-meta);
}

.header-analyzer-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--header-border);
  border-radius: var(--header-radius-small);
}

.header-analyzer-table {
  width: 100%;
  min-width: var(--header-table-min-width);
  border-collapse: collapse;
  background: var(--header-panel);
  font-size: var(--header-font-size-table);
}

.header-analyzer-table th,
.header-analyzer-table td {
  padding: var(--header-space-3) var(--header-space-4);
  border-bottom: 1px solid var(--header-border);
  text-align: start;
  vertical-align: top;
}

.header-analyzer-table th {
  background: var(--header-soft);
  white-space: nowrap;
}

.header-analyzer-table tbody tr:last-child td {
  border-bottom: 0;
}

.header-analyzer-table-name,
.header-analyzer-table-value {
  font-family: var(--header-code);
  overflow-wrap: anywhere;
}

.header-analyzer-table-name {
  font-weight: 700;
}

.header-analyzer-table-value {
  max-width: var(--header-table-value-max-width);
  color: var(--header-text);
}

.header-analyzer-category,
.header-analyzer-severity {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid currentColor;
  border-radius: var(--header-radius-pill);
  font-size: var(--header-font-size-badge);
  font-weight: 700;
  white-space: nowrap;
}

.header-analyzer-category {
  color: var(--header-primary);
  background: var(--header-info-soft);
}

.header-analyzer-finding-list {
  gap: var(--header-space-3);
}

.header-analyzer-finding {
  padding: var(--header-space-4) var(--header-space-5);
  border: 1px solid var(--header-finding-border, var(--header-border));
  border-inline-start-width: 4px;
  border-inline-start-color: var(--header-finding-accent, var(--header-border));
  border-radius: var(--header-radius-small);
  background: var(--header-soft);
}

.header-analyzer-finding[data-severity="critical"] {
  --header-finding-border: var(--header-critical-border);
  --header-finding-accent: var(--header-critical);
}

.header-analyzer-finding[data-severity="warning"] {
  --header-finding-border: var(--header-warning-border);
  --header-finding-accent: var(--header-warning);
}

.header-analyzer-finding[data-severity="info"] {
  --header-finding-accent: var(--header-info);
}

.header-analyzer-finding[data-severity="success"] {
  --header-finding-border: var(--header-success-border);
  --header-finding-accent: var(--header-success);
}

.header-analyzer-finding-heading {
  gap: var(--header-space-2);
  align-items: baseline;
}

.header-analyzer-finding-heading strong {
  font-size: var(--header-font-size-finding-title);
}

.header-analyzer-severity[data-severity="critical"] {
  color: var(--header-critical);
  background: var(--header-critical-bg);
}

.header-analyzer-severity[data-severity="warning"] {
  color: var(--header-warning);
  background: var(--header-warning-bg);
}

.header-analyzer-severity[data-severity="info"] {
  color: var(--header-info);
  background: var(--header-info-soft);
}

.header-analyzer-severity[data-severity="success"] {
  color: var(--header-success);
  background: var(--header-success-bg);
}

.header-analyzer-finding p {
  margin: 5px 0 0;
  color: var(--header-muted);
  font-size: var(--header-font-size-support);
}

.header-analyzer-finding .header-analyzer-recommendation {
  color: var(--header-text);
}

.header-analyzer-empty {
  margin: var(--header-space-6) 0 0;
  color: var(--header-muted);
  text-align: center;
}

.header-analyzer-normalized {
  margin-top: var(--header-section-gap);
  border-top: 1px solid var(--header-border);
  padding-top: var(--header-space-5);
}

.header-analyzer-normalized summary {
  width: fit-content;
  color: var(--header-primary);
  font-weight: 700;
  cursor: pointer;
}

.header-analyzer-output {
  min-height: var(--header-output-height);
  margin-top: var(--header-space-3);
  resize: vertical;
  font-family: var(--header-code);
  line-height: var(--header-editor-line-height);
  white-space: pre;
  overflow: auto;
}

/* Supporting information and visually hidden content. */
.header-analyzer-about h3 {
  margin: var(--header-space-7) 0 var(--header-space-1);
  font-size: var(--header-font-size-section);
}

.header-analyzer-about-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--header-space-8);
}

.header-analyzer-about :is(ul, ol) {
  margin: var(--header-space-1) 0 0;
  padding-inline-start: var(--header-list-indent);
}

.header-analyzer-privacy {
  padding: 11px 13px;
  border-radius: var(--header-control-radius);
}

.header-analyzer-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Responsive layout adjustments. */
@media (max-width: 980px) {
  .header-analyzer-filters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .header-analyzer-main {
    width: min(calc(100% - var(--header-page-gutter-mobile)), var(--header-content-max-width));
    padding-top: var(--header-space-7);
  }

  .header-analyzer-panel {
    padding: var(--header-space-5);
  }

  .header-analyzer-panel-heading--row {
    flex-direction: column;
  }

  .header-analyzer-theme,
  .header-analyzer-settings,
  .header-analyzer-about-grid {
    grid-template-columns: 1fr;
    width: 100%;
  }

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

  .header-analyzer-shortcut {
    width: 100%;
    margin-inline-start: 0;
  }

  .header-analyzer-actions--compact {
    justify-content: flex-start;
  }
}

@media (max-width: 500px) {
  .header-analyzer-filters,
  .header-analyzer-summary {
    grid-template-columns: 1fr;
  }

  .header-analyzer-actions .header-analyzer-button {
    flex: 1 1 calc(50% - var(--header-space-2));
  }

  .header-analyzer-result-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}