:root {
  --color-bg: #f5f6f8;
  --color-panel: #ffffff;
  --color-border: #d7dbe0;
  --color-text: #1f2933;
  --color-muted: #647382;
  --color-found: #1b7f4d;
  --color-found-bg: #e5f5ec;
  --color-not-found: #8a6d1f;
  --color-not-found-bg: #fbf3dd;
  --color-error: #b02a37;
  --color-error-bg: #fbe3e5;
  --color-not-queryable: #5b6672;
  --color-not-queryable-bg: #eceff2;
  --color-warning: #b02a37;
  --color-warning-bg: #fde3e3;
  --color-accent: #1f5fbf;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.4;
}

.app-header {
  padding: 1.5rem 2rem 0.75rem;
}

.app-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.app-logo {
  color: var(--color-accent);
  flex: none;
}

.app-header h1 {
  margin: 0;
  font-size: 1.5rem;
}

/* --- Help "?" popover next to the title --- */

.app-help {
  position: relative;
  display: inline-flex;
}

.help-button {
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
}

.help-button:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

.help-button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.help-popover {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  z-index: 10;
  width: max-content;
  max-width: 22rem;
  padding: 0.6rem 0.8rem;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 4px 16px rgb(31 41 51 / 12%);
  color: var(--color-text);
  font-size: 0.9rem;
}

.help-popover[hidden] {
  display: none;
}

main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1rem 2rem 3rem;
}

/* --- Top-navigation tabs --- */

.tabs {
  padding: 0 2rem;
  border-bottom: 1px solid var(--color-border);
}

.tablist {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.tab {
  padding: 0.65rem 1.25rem;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--color-muted);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: -1px;
  transition:
    color 0.12s ease,
    border-color 0.12s ease;
}

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

.tab[aria-selected="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: 4px;
}

.tabpanel[hidden] {
  display: none;
}

.tabpanel:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}

.panel h2 {
  margin-top: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.form-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field-grow {
  flex: 1 1 240px;
}

.field-actions {
  justify-content: flex-end;
}

/* Keep the submit button in an action field from stretching to the full field width. */
.field-actions button {
  align-self: flex-start;
}

.form-inline .field-actions button {
  align-self: stretch;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
}

input,
select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.95rem;
}

button {
  padding: 0.5rem 1.1rem;
  min-height: 2.3rem;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition:
    background 0.12s ease,
    border-color 0.12s ease;
}

button:hover:not(:disabled) {
  background: #1a52a6;
  border-color: #1a52a6;
}

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

/* The "?" help toggle and other secondary controls opt out of the primary button look. */
.help-button {
  min-height: 0;
  font-weight: 700;
}

.help-button:hover:not(:disabled) {
  background: var(--color-panel);
  border-color: var(--color-muted);
}

.field-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.status-note {
  margin: 0.5rem 0 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.error-note {
  margin: 0.5rem 0 0;
  color: var(--color-error);
  font-weight: 600;
  min-height: 1.2em;
}

.error-note:empty {
  display: none;
}

/* --- Partial view cards --- */

.results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.query-summary {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.assessment {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.5rem 0 1rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-not-queryable-bg);
  color: var(--color-not-queryable);
}

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

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

.system-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.system-card {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem;
}

.system-card header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.system-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.status-pill {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.status-found {
  background: var(--color-found-bg);
  color: var(--color-found);
}

.status-not_found {
  background: var(--color-not-found-bg);
  color: var(--color-not-found);
}

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

.status-not_queryable {
  background: var(--color-not-queryable-bg);
  color: var(--color-not-queryable);
}

.kv {
  margin: 0.25rem 0;
  font-size: 0.9rem;
}

.kv dt {
  font-weight: 600;
  color: var(--color-muted);
}

.kv dd {
  margin: 0 0 0.4rem;
}

.rate-limit {
  margin-top: 0.5rem;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  font-size: 0.85rem;
  background: var(--color-not-queryable-bg);
}

.rate-limit-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  font-weight: 700;
  border: 1px solid var(--color-warning);
}

details.raw-data {
  margin-top: 0.6rem;
}

details.raw-data summary {
  cursor: pointer;
  font-weight: 600;
}

pre.json {
  margin: 0.4rem 0 0;
  padding: 0.6rem;
  background: #0f1620;
  color: #e6edf3;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.8rem;
}

/* --- History --- */

.history {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.history-total {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.history-item {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
}

.history-item time {
  font-weight: 600;
}

.history-caller {
  color: var(--color-muted);
}

.history-systems {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.history-actions {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

/* --- Diff --- */

.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.diff-table th,
.diff-table td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

.diff-table th {
  background: var(--color-not-queryable-bg);
}

.diff-row-changed td {
  background: var(--color-not-found-bg);
}

.diff-attr {
  font-weight: 600;
  color: var(--color-muted);
}