:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #d8dce2;
  --text: #1d2126;
  --muted: #5b6470;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --ok-bg: #e6f4ea;
  --ok-text: #1a6b32;
  --fail-bg: #fdecea;
  --fail-text: #a4241a;
  --warn-bg: #fff4e0;
  --warn-text: #8a5300;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "DejaVu Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --surface: #1d2126;
    --border: #353b43;
    --text: #e3e6ea;
    --muted: #9aa3ae;
    --accent: #4c8dff;
    --accent-text: #0b0d10;
    --ok-bg: #16311f;
    --ok-text: #7fd699;
    --fail-bg: #3a1a17;
    --fail-text: #ff9a8f;
    --warn-bg: #3a2c12;
    --warn-text: #f0c070;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }
code { font-family: var(--mono); font-size: 0.9em; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 0.5rem; }
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}
.logo img { height: 32px; width: auto; }
.subtitle { color: var(--muted); }
.links { display: flex; gap: 1rem; }
.links a { text-decoration: none; }
.links a:hover { text-decoration: underline; }

main { max-width: 1200px; margin: 0 auto; padding: 1rem; }
.intro { margin: 0.25rem 0 1rem; color: var(--muted); }

.status {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0 0.5rem;
  border-radius: 999px;
  font-size: 0.85em;
}
.status.loading { background: var(--warn-bg); color: var(--warn-text); }
.status.ready { background: var(--ok-bg); color: var(--ok-text); }
.status.error { background: var(--fail-bg); color: var(--fail-text); }

.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
[role="tab"] {
  appearance: none;
  border: 1px solid transparent;
  border-bottom: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  margin-bottom: -1px;
}
[role="tab"][aria-selected="true"] {
  color: var(--text);
  background: var(--bg);
  border-color: var(--border);
}
[role="tab"]:focus-visible, button:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.inputs.two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1rem;
}
.field { display: flex; flex-direction: column; margin-bottom: 1rem; min-width: 0; }
.field-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}
.field-head label { font-weight: 600; }
.hint { color: var(--muted); font-size: 0.85em; }

textarea {
  width: 100%;
  min-height: 16rem;
  resize: vertical;
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: 13px/1.45 var(--mono);
  tab-size: 2;
}
textarea.short { min-height: 3.5rem; }
textarea.medium { min-height: 7.5rem; }

select {
  font: inherit;
  font-size: 0.9em;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}
label.inline { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--muted); }

button.primary {
  font: inherit;
  font-weight: 600;
  padding: 0.45rem 1.4rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
}
button.primary:disabled { opacity: 0.5; cursor: progress; }
.shortcut { color: var(--muted); font-size: 0.8em; }

.result { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.result-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0.75rem;
  font-weight: 600;
}
.result[data-kind="ok"] .result-head { background: var(--ok-bg); color: var(--ok-text); }
.result[data-kind="fail"] .result-head { background: var(--fail-bg); color: var(--fail-text); }
.result[data-kind="error"] .result-head { background: var(--warn-bg); color: var(--warn-text); }
.timing { font-weight: 400; opacity: 0.8; }
.output {
  margin: 0;
  padding: 0.75rem;
  overflow-x: auto;
  background: var(--surface);
  /* Line height 1.2 keeps the box-drawing lines of the tables connected. */
  font: 13px/1.2 var(--mono);
  white-space: pre;
}
.result[data-kind="error"] .output { white-space: pre-wrap; }

footer {
  max-width: 1200px;
  margin: 1rem auto 2rem;
  padding: 0 1rem;
  color: var(--muted);
  font-size: 0.9em;
}

.format-tag {
  font-size: 0.8em;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
}

/* The PGSchema report as a table (the "Table" result format) */
.table-output { overflow-x: auto; background: var(--surface); }
table.report { width: 100%; border-collapse: collapse; font-size: 0.9em; }
table.report th, table.report td {
  text-align: left;
  vertical-align: top;
  padding: 0.45rem 0.75rem;
  border-top: 1px solid var(--border);
}
table.report th { color: var(--muted); font-weight: 600; border-top: none; }
table.report th, table.report td.verdict-cell { white-space: nowrap; }
table.report td.verdict-cell { font-weight: 600; }
table.report tr.ok td.verdict-cell { color: var(--ok-text); }
table.report tr.fail td.verdict-cell { color: var(--fail-text); }
table.report .details {
  font: 12px/1.4 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--muted);
  min-width: 16rem;
}

/* RDF tab: the converted data sits next to the input */
.result.converted { display: flex; flex-direction: column; height: 16rem; }
.result.converted:not([data-kind]) .result-head { color: var(--muted); font-weight: 400; }
.result.converted .output { flex: 1; min-height: 0; overflow: auto; }

button.secondary {
  font: inherit;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}
button.secondary:disabled { opacity: 0.5; cursor: default; }

/* Narrow screens: keep the four tabs on one line, and let long status
   messages wrap. */
.status { max-width: 100%; }
.tabs { overflow-x: auto; scrollbar-width: none; }
@media (max-width: 480px) {
  [role="tab"] { padding: 0.5rem 0.8rem; }
}

/* Second level of tabs (inside Data, Validate and Query): segmented buttons */
.tabs.subtabs {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 1rem;
  max-width: 100%;
}
.subtabs [role="tab"] {
  border: none;
  border-radius: 6px;
  margin: 0;
  padding: 0.3rem 0.9rem;
  font-size: 0.9em;
}
.subtabs [role="tab"][aria-selected="true"] {
  background: var(--accent);
  color: var(--accent-text);
}

/* Solutions of SPARQL SELECT queries */
table.solutions td code { font-size: 12px; white-space: pre-wrap; overflow-wrap: anywhere; }
table.solutions .term-note { color: var(--muted); font: 11px var(--mono); }
#sparql-example { max-width: 18rem; }

/* Schema conversion, below the validation of each schema language */
.toolbar.schema-tools { margin-top: 1rem; }
.result + .toolbar.schema-tools { margin-top: 1.25rem; }
.toolbar.schema-tools + .result { margin-bottom: 1rem; }

/* Diagrams drawn with PlantUML: always on white, as PlantUML draws them */
.diagram { background: var(--surface); }
.diagram-tools {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  padding: 0.35rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85em;
}
.link {
  appearance: none;
  border: none;
  background: none;
  padding: 0;
  font: inherit;
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}
.link:hover { text-decoration: underline; }
a.link:not([href]) { color: var(--muted); pointer-events: none; }
.diagram-image { overflow: auto; padding: 0.75rem; max-height: 40rem; }
.diagram-image img { display: block; max-width: 100%; height: auto; background: #fff; border-radius: 4px; padding: 0.5rem; }
.diagram-status { margin: 0; color: var(--muted); font-size: 0.9em; }
.diagram-status.error { color: var(--fail-text); }
/* In the RDF converter the box has a fixed height: the diagram scrolls */
.result.converted .diagram { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.result.converted .diagram[hidden] { display: none; }
.result.converted .diagram-image { flex: 1; max-height: none; }
.result.converted .output:not([hidden]) + .diagram { flex: 0 0 auto; }