/* Theme, typography, spacing, and component geometry. */
:root {
  color-scheme: light;
  --ua-bg: #f3f6f9;
  --ua-panel: #ffffff;
  --ua-soft: #f7f9fc;
  --ua-control: #ffffff;
  --ua-border: #cbd5e1;
  --ua-text: #172033;
  --ua-muted: #5b677a;
  --ua-primary: #0969da;
  --ua-primary-hover: #0757b8;
  --ua-info-bg: #e8f4ff;
  --ua-info-border: #8cc8ff;
  --ua-success: #137333;
  --ua-error: #b42318;
  --ua-warning: #8a5200;
  --ua-on-primary: #ffffff;
  --ua-code: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --ua-border-width: 1px;
  --ua-panel-radius: 10px;
  --ua-notice-radius: 9px;
  --ua-card-radius: 8px;
  --ua-control-radius: 7px;
  --ua-content-width: 1240px;
  --ua-page-gutter: 32px;
  --ua-page-gutter-compact: 20px;
  --ua-page-padding-top: 28px;
  --ua-page-padding-top-compact: 20px;
  --ua-page-padding-bottom: 48px;
  --ua-panel-gap: 16px;
  --ua-panel-padding: 18px;
  --ua-panel-padding-compact: 14px;
  --ua-heading-gap: 16px;
  --ua-action-gap: 10px;
  --ua-summary-gap: 12px;
  --ua-detail-gap: 10px;
  --ua-about-gap: 24px;
  --ua-section-gap: 22px;
  --ua-control-min-height: 42px;
  --ua-button-min-height: 38px;
  --ua-input-height: 210px;
  --ua-input-height-compact: 180px;
  --ua-heading-font-size: 1.15rem;
  --ua-section-font-size: 1rem;
  --ua-breadcrumb-font-size: .9rem;
  --ua-table-font-size: .88rem;
  --ua-shortcut-font-size: .85rem;
  --ua-label-font-size: .84rem;
  --ua-caption-font-size: .82rem;
  --ua-meta-font-size: .78rem;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ua-bg: #0d1117;
  --ua-panel: #161b22;
  --ua-soft: #1f2630;
  --ua-control: #1f2630;
  --ua-border: #46505f;
  --ua-text: #f0f3f6;
  --ua-muted: #a7b0bf;
  --ua-primary: #2f81f7;
  --ua-primary-hover: #58a6ff;
  --ua-info-bg: #102b46;
  --ua-info-border: #266aa8;
  --ua-success: #56d364;
  --ua-error: #ff7b72;
  --ua-warning: #e3b341;
}

/* Scoped reset and page shell. */
.ua-page,
.ua-page *,
.ua-page *::before,
.ua-page *::after { box-sizing: border-box; }
.ua-page [hidden] { display: none; }

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

.ua-main {
  width: min(var(--ua-content-width), calc(100% - var(--ua-page-gutter)));
  margin-block: 0;
  margin-inline: auto;
  padding-block: var(--ua-page-padding-top) var(--ua-page-padding-bottom);
  padding-inline: 0;
}

/* Page introduction, navigation, notices, and panels. */
.ua-page-header { margin-block-end: var(--ua-panel-gap); }
.ua-page-title { margin-block: 8px 4px; margin-inline: 0; font-size: clamp(1.55rem, 3vw, 2rem); line-height: 1.35; }
.ua-page-description, .ua-panel-description { margin-block: 4px 0; margin-inline: 0; color: var(--ua-muted); }
.ua-breadcrumb { display: flex; gap: 8px; align-items: center; font-size: var(--ua-breadcrumb-font-size); }
.ua-breadcrumb a { color: var(--ua-primary); }

.ua-notice, .ua-privacy {
  border: var(--ua-border-width) solid var(--ua-info-border);
  background: var(--ua-info-bg);
  color: var(--ua-primary);
}

.ua-notice { margin-block-end: var(--ua-panel-gap); padding: 12px 14px; border-radius: var(--ua-notice-radius); }
.ua-panel { margin-block-end: var(--ua-panel-gap); padding: var(--ua-panel-padding); border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-panel-radius); background: var(--ua-panel); }
.ua-panel-heading { margin-block-end: var(--ua-heading-gap); }
.ua-panel-title { margin: 0; font-size: var(--ua-heading-font-size); }
.ua-panel-heading--row { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--ua-heading-gap); }

/* Input controls, source selection, and actions. */
.ua-field, .ua-theme, .ua-sample { display: grid; gap: 6px; font-weight: 600; }
.ua-theme { grid-template-columns: auto 130px; align-items: center; }
.ua-sample { grid-template-columns: auto minmax(180px, 260px); align-items: center; }
.ua-control { width: 100%; min-height: var(--ua-control-min-height); padding: 9px 11px; border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-control-radius); background: var(--ua-control); color: var(--ua-text); font: inherit; }
.ua-input { height: var(--ua-input-height); resize: none; font-family: var(--ua-code); line-height: 1.55; white-space: pre; overflow: auto; }

.ua-action-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ua-action-gap); }
.ua-source-actions { margin-block-end: 14px; }
.ua-actions { margin-block-start: 14px; }
.ua-actions--compact { justify-content: flex-end; margin-block-start: 0; }
.ua-button { min-height: var(--ua-button-min-height); padding: 8px 14px; border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-control-radius); background: var(--ua-soft); color: var(--ua-text); font: inherit; font-weight: 700; cursor: pointer; }
.ua-control:focus, .ua-button:focus-visible { outline: 3px solid color-mix(in srgb, var(--ua-primary) 42%, transparent); outline-offset: 2px; }
.ua-button:hover:not(:disabled) { border-color: var(--ua-primary); }
.ua-button--primary { border-color: var(--ua-primary); background: var(--ua-primary); color: var(--ua-on-primary); }
.ua-button--primary:hover:not(:disabled) { background: var(--ua-primary-hover); }
.ua-button:disabled { cursor: not-allowed; opacity: .55; }
.ua-shortcut { color: var(--ua-muted); font-size: var(--ua-shortcut-font-size); }

.ua-message { min-height: 24px; margin-block: 12px 0; margin-inline: 0; color: var(--ua-muted); }
.ua-message[data-type="success"] { color: var(--ua-success); }
.ua-message[data-type="error"] { color: var(--ua-error); }

/* Analysis summaries, details, tables, and warnings. */
.ua-grid { display: grid; }
.ua-summary { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--ua-summary-gap); margin-block: 0; margin-inline: 0; }
.ua-result-card { padding: 14px; border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-card-radius); background: var(--ua-soft); }
.ua-result-label { color: var(--ua-muted); font-size: var(--ua-label-font-size); font-weight: 700; }
.ua-result-value { margin-block: 5px 2px; margin-inline: 0; font-weight: 700; overflow-wrap: anywhere; }
.ua-result-meta { color: var(--ua-muted); font-size: var(--ua-meta-font-size); }

.ua-result-section { margin-block-start: var(--ua-section-gap); }
.ua-result-title { margin-block: 0 10px; margin-inline: 0; font-size: var(--ua-section-font-size); }
.ua-result-heading { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.ua-result-heading span { color: var(--ua-muted); font-size: var(--ua-caption-font-size); }
.ua-detail { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--ua-detail-gap); margin-block: 0; margin-inline: 0; }
.ua-code-output { min-height: 90px; margin-block: 0; margin-inline: 0; padding: 12px; border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-card-radius); background: var(--ua-soft); color: var(--ua-text); font-family: var(--ua-code); white-space: pre-wrap; overflow-wrap: anywhere; }
.ua-table-scroll { overflow-x: auto; border: var(--ua-border-width) solid var(--ua-border); border-radius: var(--ua-card-radius); }
.ua-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: var(--ua-table-font-size); }
.ua-table th, .ua-table td { padding: 9px 11px; border-block-end: var(--ua-border-width) solid var(--ua-border); text-align: start; }
.ua-table th { background: var(--ua-soft); }
.ua-table tbody tr:last-child td { border-block-end: 0; }
.ua-token-name, .ua-token-value { font-family: var(--ua-code); }
.ua-warning-section { color: var(--ua-warning); }
.ua-warning-list { margin: 0; padding-inline-start: 1.4rem; }

/* Supporting information and screen-reader-only content. */
.ua-about-title { margin-block: 20px 8px; margin-inline: 0; font-size: var(--ua-section-font-size); }
.ua-about-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--ua-about-gap); }
.ua-about-list { margin: 0; padding-inline-start: 1.4rem; }
.ua-privacy { margin-block-start: 18px; padding: 12px 14px; border-radius: var(--ua-card-radius); }
.ua-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: 820px) {
  .ua-main { width: min(var(--ua-content-width), calc(100% - var(--ua-page-gutter-compact))); padding-block-start: var(--ua-page-padding-top-compact); }
  .ua-panel-heading--row, .ua-result-heading { align-items: stretch; flex-direction: column; }
  .ua-theme { grid-template-columns: auto 1fr; }
  .ua-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ua-actions--compact { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .ua-panel { padding: var(--ua-panel-padding-compact); }
  .ua-action-row { align-items: stretch; flex-direction: column; }
  .ua-button { width: 100%; }
  .ua-sample { width: 100%; grid-template-columns: 1fr; }
  .ua-summary, .ua-detail, .ua-about-grid { grid-template-columns: 1fr; }
  .ua-input { height: var(--ua-input-height-compact); }
}