/* SPDX-License-Identifier: MIT OR Apache-2.0 */
/* PurRDF console — responsive, dark + light via prefers-color-scheme, zero
   external assets (system font stacks only). */

:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --bg-elev: #f4f6f8;
  --bg-code: #f0f2f5;
  --fg: #1a1d21;
  --fg-muted: #5a636e;
  --border: #d5dbe2;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --ok-bg: #dbf3e0;
  --ok-fg: #14532d;
  --warn-bg: #fde9d0;
  --warn-fg: #7a3d00;
  --info-bg: #dbe7fb;
  --info-fg: #123a75;
  --error-bg: #fbe0e0;
  --error-fg: #8a1c1c;
  --error-border: #e5484d;
  --status-bg: #e2ecfb;
  --status-fg: #123a75;
  --add-fg: #14532d;
  --del-fg: #8a1c1c;

  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo,
    Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-elev: #161b22;
    --bg-code: #0b0f14;
    --fg: #e6edf3;
    --fg-muted: #9aa5b1;
    --border: #2a3441;
    --accent: #4c8dff;
    --accent-fg: #0d1117;
    --ok-bg: #14351f;
    --ok-fg: #7ee2a0;
    --warn-bg: #40270a;
    --warn-fg: #f2c088;
    --info-bg: #16294a;
    --info-fg: #9dc1ff;
    --error-bg: #3a1515;
    --error-fg: #ff9a9a;
    --error-border: #e5484d;
    --status-bg: #16294a;
    --status-fg: #9dc1ff;
    --add-fg: #7ee2a0;
    --del-fg: #ff9a9a;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
}

/* Header --------------------------------------------------------------- */
.app-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}
.brand h1 {
  margin: 0;
  font-size: 1.35rem;
}
.brand .dot {
  color: var(--accent);
}
.tagline {
  margin: 0.25rem 0 0;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.chip {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--fg-muted);
  text-decoration: none;
}
.chip-link {
  color: var(--accent);
}
.chip-link:hover,
.chip-link:focus {
  text-decoration: underline;
}

/* Banners -------------------------------------------------------------- */
.banner {
  margin: 0.75rem 1.25rem 0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.banner-error {
  background: var(--error-bg);
  color: var(--error-fg);
  border: 1px solid var(--error-border);
}
.banner-status {
  background: var(--status-bg);
  color: var(--status-fg);
  border: 1px solid var(--border);
}

.jsonld-note {
  margin: 0.75rem 1.25rem 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* Tabs ----------------------------------------------------------------- */
.tabs {
  padding: 0.75rem 1.25rem 0;
}
[role="tablist"] {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
}
.tab {
  font-family: var(--sans);
  font-size: 0.92rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
}
.tab:hover {
  color: var(--fg);
}
.tab[aria-selected="true"] {
  background: var(--bg-elev);
  color: var(--fg);
  border-color: var(--border);
  font-weight: 600;
}

/* Panes ---------------------------------------------------------------- */
main {
  padding: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}
.pane h2 {
  margin-top: 0;
}
.muted {
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.note {
  background: var(--info-bg);
  color: var(--info-fg);
  border-radius: var(--radius);
  padding: 0.6rem 0.85rem;
  font-size: 0.88rem;
}

.field {
  margin: 0.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.field label {
  font-weight: 600;
  font-size: 0.85rem;
}

.code,
.select {
  font-family: var(--mono);
  font-size: 0.88rem;
  background: var(--bg-code);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.7rem;
  width: 100%;
}
textarea.code {
  resize: vertical;
  min-height: 8rem;
  tab-size: 2;
}
.select {
  max-width: 16rem;
  font-family: var(--sans);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.btn {
  font-family: var(--sans);
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  color: var(--fg);
  cursor: pointer;
}
.btn:hover {
  border-color: var(--accent);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  font-weight: 600;
}
.btn-mini {
  font-family: var(--sans);
  font-size: 0.78rem;
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
}
.btn-mini:hover {
  border-color: var(--accent);
}

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

/* Code output ---------------------------------------------------------- */
.code-out {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--bg-code);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.8rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 22rem;
}

.code-out.ser-error {
  color: var(--warn-fg);
  background: var(--warn-bg);
  border-color: var(--warn-fg);
}

/* Round-trip grid ------------------------------------------------------ */
.ser-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.ser-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 0.6rem;
}
.ser-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.ser-title {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.spacer {
  flex: 1;
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
}
.badge-ok {
  background: var(--ok-bg);
  color: var(--ok-fg);
}
.badge-warn {
  background: var(--warn-bg);
  color: var(--warn-fg);
}
.badge-info {
  background: var(--info-bg);
  color: var(--info-fg);
}

/* Tables --------------------------------------------------------------- */
.results {
  margin-top: 1rem;
  overflow-x: auto;
}
.data-table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.data-table th,
.data-table td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.55rem;
  text-align: left;
  vertical-align: top;
  word-break: break-word;
}
.data-table th {
  background: var(--bg-elev);
}
.data-table td.mono,
.mono {
  font-family: var(--mono);
}
.term-link {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
  text-align: left;
  text-decoration: underline dotted;
  word-break: break-word;
}
.term-link:hover {
  text-decoration: underline;
}

.ask-result {
  font-family: var(--mono);
  font-weight: 600;
}

/* Identity ------------------------------------------------------------- */
.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
}
.identity-verdict {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
}
.verdict-yes {
  color: var(--ok-fg);
}
.verdict-no {
  color: var(--del-fg);
}
.diff {
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-code);
  padding: 0.5rem 0.7rem;
  overflow-x: auto;
}
.diff-line {
  white-space: pre-wrap;
  word-break: break-word;
}
.diff-add {
  color: var(--add-fg);
}
.diff-del {
  color: var(--del-fg);
}

/* Gallery -------------------------------------------------------------- */
.gallery {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
}
.gallery-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 0.9rem;
}
.gallery-item h3 {
  margin-top: 0;
}
.gallery-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* Footer --------------------------------------------------------------- */
.app-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.25rem;
  color: var(--fg-muted);
  font-size: 0.85rem;
  max-width: 1200px;
  margin: 1rem auto 0;
}

@media (max-width: 640px) {
  .app-header {
    flex-direction: column;
  }
  main {
    padding: 1rem 0.85rem;
  }
}