/* Theme colors and stable layout dimensions. */
:root[data-tool="chmod-permission-calculator"] {
  color-scheme: light;
  --chmod-bg: #f3f6f9;
  --chmod-panel: #ffffff;
  --chmod-soft: #f7f9fc;
  --chmod-control: #ffffff;
  --chmod-border: #cbd5e1;
  --chmod-text: #172033;
  --chmod-muted: #5b677a;
  --chmod-primary: #0969da;
  --chmod-primary-hover: #0757b8;
  --chmod-info-bg: #e8f4ff;
  --chmod-info-border: #8cc8ff;
  --chmod-success: #137333;
  --chmod-success-bg: #eaf7ed;
  --chmod-success-border: #8bd39b;
  --chmod-warning: #8a5200;
  --chmod-warning-bg: #fff8e5;
  --chmod-warning-border: #e4b341;
  --chmod-critical: #b42318;
  --chmod-critical-bg: #fff0ee;
  --chmod-critical-border: #f3aaa3;
  --chmod-code: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --chmod-content-width: 1240px;
  --chmod-control-height: 42px;
  --chmod-page-gutter: 32px;
  --chmod-page-gutter-compact: 20px;
  --chmod-page-padding-start: 32px;
  --chmod-page-padding-end: 48px;
  --chmod-control-padding-block: 8px;
  --chmod-control-padding-inline: 10px;
  --chmod-table-min-width: 620px;
  --chmod-check-min-width: 58px;
  --chmod-checkbox-size: 18px;
  --chmod-digit-min-width: 34px;
  --chmod-digit-min-height: 30px;
  --chmod-copy-button-height: 30px;
  --chmod-radius: 10px;
  --chmod-radius-small: 8px;
  --chmod-radius-control: 7px;
  --chmod-space-1: 6px;
  --chmod-space-2: 8px;
  --chmod-space-3: 10px;
  --chmod-space-4: 12px;
  --chmod-space-5: 14px;
  --chmod-space-6: 16px;
  --chmod-space-7: 18px;
  --chmod-space-8: 20px;
  --chmod-section-gap: var(--chmod-space-6);
  --chmod-layout-gap: var(--chmod-space-4);
  --chmod-panel-padding: var(--chmod-space-7);
  --chmod-panel-padding-compact: var(--chmod-space-5);
  --chmod-card-padding: var(--chmod-space-5);
}

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

/* Keep foundational rules isolated from the shared site shell. */
html[data-tool="chmod-permission-calculator"],
html[data-tool="chmod-permission-calculator"] * {
  box-sizing: border-box;
}

html[data-tool="chmod-permission-calculator"] [hidden] {
  display: none;
}

body.chmod-page {
  min-height: 100vh;
  margin: 0;
  background: var(--chmod-bg);
  color: var(--chmod-text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

/* Page width, title, breadcrumb, and privacy notice. */
.chmod-main {
  width: min(var(--chmod-content-width), calc(100% - var(--chmod-page-gutter)));
  margin: 0 auto;
  padding-block: var(--chmod-page-padding-start) var(--chmod-page-padding-end);
  padding-inline: 0;
}

.chmod-page-header {
  margin-block-end: var(--chmod-section-gap);
}

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

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

.chmod-breadcrumb {
  display: flex;
  gap: var(--chmod-space-2);
  align-items: center;
  font-size: 0.9rem;
}

.chmod-breadcrumb a {
  color: var(--chmod-primary);
  font-weight: 700;
}

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

.chmod-notice {
  margin-block-end: var(--chmod-section-gap);
  padding: var(--chmod-space-4) var(--chmod-space-5);
  border-radius: 9px;
}

/* Shared panels and section headings. */
.chmod-panel {
  margin-block-end: var(--chmod-section-gap);
  padding: var(--chmod-panel-padding);
  border: 1px solid var(--chmod-border);
  border-radius: var(--chmod-radius);
  background: var(--chmod-panel);
}

.chmod-panel-heading {
  margin-block-end: var(--chmod-section-gap);
}

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

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

/* Form fields, controls, and input-mode layouts. */
.chmod-theme-field,
.chmod-field {
  display: grid;
  gap: var(--chmod-space-1);
  font-weight: 700;
}

.chmod-theme-field {
  grid-template-columns: auto minmax(110px, 145px);
  align-items: center;
}

.chmod-control,
.chmod-button,
.chmod-copy-button {
  min-height: var(--chmod-control-height);
  border: 1px solid var(--chmod-border);
  border-radius: var(--chmod-radius-control);
  background: var(--chmod-soft);
  color: var(--chmod-text);
  font: inherit;
}

.chmod-control {
  width: 100%;
  padding: var(--chmod-control-padding-block) var(--chmod-control-padding-inline);
  background: var(--chmod-control);
}

.chmod-code {
  font-family: var(--chmod-code);
}

.chmod-setting-grid {
  display: grid;
  grid-template-columns: minmax(150px, 0.6fr) minmax(260px, 1.4fr) minmax(230px, 1fr);
  gap: var(--chmod-layout-gap);
  margin-block-end: var(--chmod-section-gap);
}

.chmod-format-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--chmod-layout-gap);
  margin-block-end: var(--chmod-section-gap);
}

.chmod-mode-input {
  font-size: 1.05rem;
  font-weight: 700;
}

.chmod-field-help {
  color: var(--chmod-muted);
  font-size: 0.82rem;
  font-weight: 400;
}

/* Reusable surface treatments retain component-specific spacing. */
:is(.chmod-permission-fieldset, .chmod-special-option, .chmod-result-card) {
  border: 1px solid var(--chmod-border);
}

:is(.chmod-special-option, .chmod-result-card) {
  background: var(--chmod-soft);
}

:is(.chmod-permission-fieldset, .chmod-result-card, .chmod-warning-item) {
  border-radius: var(--chmod-radius-small);
}

/* Basic permission matrix and per-group totals. */
.chmod-permission-fieldset {
  min-width: 0;
  margin-block: 0 var(--chmod-section-gap);
  margin-inline: 0;
  padding: var(--chmod-space-4);
}

.chmod-permission-fieldset legend {
  padding: 0 var(--chmod-space-2);
  font-weight: 750;
}

.chmod-table-wrap {
  overflow-x: auto;
}

.chmod-permission-table {
  width: 100%;
  min-width: var(--chmod-table-min-width);
  border-collapse: collapse;
  text-align: center;
}

.chmod-permission-table th,
.chmod-permission-table td {
  padding: var(--chmod-space-3) var(--chmod-space-4);
  border-bottom: 1px solid var(--chmod-border);
}

.chmod-permission-table th {
  background: var(--chmod-soft);
}

.chmod-permission-table tbody tr:last-child > * {
  border-bottom: 0;
}

.chmod-permission-table tbody th {
  text-align: start;
  white-space: nowrap;
}

.chmod-check {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: var(--chmod-space-2);
  min-width: var(--chmod-check-min-width);
  cursor: pointer;
}

.chmod-check input,
.chmod-special-option input,
.chmod-recursive-option input {
  width: var(--chmod-checkbox-size);
  height: var(--chmod-checkbox-size);
  margin: 0;
  accent-color: var(--chmod-primary);
}

.chmod-check span,
.chmod-digit {
  font-family: var(--chmod-code);
  font-weight: 800;
}

.chmod-digit {
  display: inline-grid;
  place-items: center;
  min-width: var(--chmod-digit-min-width);
  min-height: var(--chmod-digit-min-height);
  border-radius: 6px;
  background: var(--chmod-info-bg);
  color: var(--chmod-primary);
}

/* Special permissions, recursive mode, and calculator actions. */
.chmod-special-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--chmod-space-3);
}

.chmod-special-option {
  display: flex;
  gap: var(--chmod-space-3);
  align-items: center;
  padding: var(--chmod-space-4);
  border-radius: var(--chmod-radius-control);
  cursor: pointer;
}

.chmod-special-option span {
  display: grid;
  gap: 2px;
}

.chmod-special-option small {
  color: var(--chmod-muted);
}

.chmod-recursive-option {
  display: inline-flex;
  gap: var(--chmod-space-2);
  align-items: center;
  cursor: pointer;
}

.chmod-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: var(--chmod-space-2);
  margin-block-start: var(--chmod-section-gap);
}

.chmod-button,
.chmod-copy-button {
  padding: 7px 13px;
  font-weight: 700;
  cursor: pointer;
}

.chmod-copy-button {
  min-height: var(--chmod-copy-button-height);
  padding: 3px 9px;
  font-size: 0.78rem;
}

:is(.chmod-button, .chmod-copy-button):hover:not(:disabled) {
  border-color: var(--chmod-primary);
  color: var(--chmod-primary);
}

.chmod-button--primary {
  border-color: var(--chmod-primary);
  background: var(--chmod-primary);
  color: #ffffff;
}

.chmod-button--primary:hover:not(:disabled) {
  background: var(--chmod-primary-hover);
  color: #ffffff;
}

:is(.chmod-control, .chmod-button, .chmod-copy-button, .chmod-check input, .chmod-special-option input, .chmod-recursive-option input):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--chmod-primary) 42%, transparent);
  outline-offset: 2px;
}

/* Status messages shown after state changes and copy operations. */
.chmod-message {
  margin-block: var(--chmod-space-5) 0;
  margin-inline: 0;
  padding: var(--chmod-space-3) var(--chmod-space-4);
  border-inline-start: 4px solid var(--chmod-message-color, var(--chmod-primary));
  background: var(--chmod-soft);
  color: var(--chmod-message-color, var(--chmod-text));
}

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

.chmod-message[data-type="warning"] {
  --chmod-message-color: var(--chmod-warning);
}

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

/* Calculated values and security findings. */
.chmod-result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--chmod-layout-gap);
}

.chmod-result-card {
  min-width: 0;
  padding: var(--chmod-card-padding);
}

.chmod-result-card--wide {
  grid-column: 1 / -1;
}

.chmod-result-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.chmod-result-card-heading {
  display: flex;
  justify-content: space-between;
  gap: var(--chmod-space-3);
  align-items: center;
}

.chmod-result-value {
  display: block;
  margin-block-start: var(--chmod-space-3);
  overflow-wrap: anywhere;
  color: var(--chmod-primary);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  font-weight: 800;
}

.chmod-description {
  display: block;
  margin-block-start: var(--chmod-space-3);
}

.chmod-warning-section {
  margin-block-start: var(--chmod-space-7);
}

.chmod-warning-section h3 {
  margin-block: 0 var(--chmod-space-3);
  margin-inline: 0;
  font-size: 1rem;
}

.chmod-warning-list {
  display: grid;
  gap: var(--chmod-space-3);
}

.chmod-warning-item {
  padding: var(--chmod-space-4) var(--chmod-space-5);
  border: 1px solid var(--chmod-finding-border, var(--chmod-border));
  border-inline-start-width: 4px;
  border-inline-start-color: var(--chmod-finding-color, var(--chmod-primary));
  background: var(--chmod-finding-bg, var(--chmod-soft));
}

.chmod-warning-item[data-level="success"] {
  --chmod-finding-color: var(--chmod-success);
  --chmod-finding-border: var(--chmod-success-border);
  --chmod-finding-bg: var(--chmod-success-bg);
}

.chmod-warning-item[data-level="warning"] {
  --chmod-finding-color: var(--chmod-warning);
  --chmod-finding-border: var(--chmod-warning-border);
  --chmod-finding-bg: var(--chmod-warning-bg);
}

.chmod-warning-item[data-level="critical"] {
  --chmod-finding-color: var(--chmod-critical);
  --chmod-finding-border: var(--chmod-critical-border);
  --chmod-finding-bg: var(--chmod-critical-bg);
}

.chmod-warning-item strong {
  color: var(--chmod-finding-color);
}

.chmod-warning-item p {
  margin-block: 3px 0;
  margin-inline: 0;
}

/* Tool guidance, privacy information, and assistive-only content. */
.chmod-about h3 {
  margin-block: var(--chmod-space-7) var(--chmod-space-1);
  margin-inline: 0;
  font-size: 1rem;
}

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

.chmod-about :is(ul, ol) {
  margin-block: var(--chmod-space-1) 0;
  margin-inline: 0;
  padding-inline-start: 1.4rem;
}

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

.chmod-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;
}

/* Tablet: keep settings compact while stacking special-permission cards. */
@media (max-width: 860px) {
  .chmod-setting-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chmod-setting-grid .chmod-field:last-child {
    grid-column: 1 / -1;
  }

  .chmod-special-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile: switch all primary two-column layouts to a single column. */
@media (max-width: 680px) {
  .chmod-main {
    width: min(calc(100% - var(--chmod-page-gutter-compact)), var(--chmod-content-width));
    padding-block-start: var(--chmod-space-7);
  }

  .chmod-panel {
    padding: var(--chmod-panel-padding-compact);
  }

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

  .chmod-theme-field,
  .chmod-setting-grid,
  .chmod-format-grid,
  .chmod-result-grid,
  .chmod-about-grid {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .chmod-setting-grid .chmod-field:last-child,
  .chmod-result-card--wide {
    grid-column: auto;
  }
}

/* Narrow mobile: share action width and stack result-card headings. */
@media (max-width: 460px) {
  .chmod-actions .chmod-button {
    flex: 1 1 calc(50% - var(--chmod-space-2));
  }

  .chmod-result-card-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* Preserve native high-contrast rendering for status indicators. */
@media (forced-colors: active) {
  .chmod-warning-item,
  .chmod-message,
  .chmod-digit {
    forced-color-adjust: auto;
  }
}