/*
  filename: fe-brain.css
  description: Styles for the FE Brain RAG page. Two-column answer + citations layout, numbered citation cards, [n] superscript references in the body.
  Author: Rodrigo Careaga
  Date: 03-05-2026
*/

.fe-brain-page .container { max-width: 1200px; }

/* ============================================================ Result layout */
.fb-result {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
  gap: 22px;
  margin: 8px 0 36px;
  align-items: start;
}
@media (max-width: 920px) {
  .fb-result { grid-template-columns: 1fr; }
}

.fb-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 28px 18px;
  color: var(--muted);
  font-size: 13.5px;
  border: 1px dashed var(--border);
  border-radius: 12px;
}

/* ============================================================ Answer column */
.fb-answer {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 14px;
  padding: 20px 22px;
  min-width: 0;
}
.fb-answer-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.fb-answer-role {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.fb-answer-q {
  font-size: 13.5px;
  color: var(--ink-2);
  background: var(--primary-soft);
  border: 1px solid rgba(0, 119, 204, 0.35);
  padding: 4px 10px;
  border-radius: 999px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.fb-answer-body {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}
.fb-answer-body p { margin: 0 0 12px; }
.fb-answer-body ul, .fb-answer-body ol { margin: 0 0 12px; padding-left: 22px; }
.fb-answer-body li { margin-bottom: 4px; }
.fb-answer-body code {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}
.fb-answer-body pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--code-border);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
}
.fb-answer-body strong { color: var(--ink); }

/* ============================================================ Citation pills inside the body */
.fb-cite-ref {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin: 0 2px;
  border-radius: 6px;
  font-size: 10.5px;
  font-weight: 700;
  background: rgba(0, 191, 179, 0.22);
  border: 1px solid rgba(0, 191, 179, 0.5);
  color: var(--teal);
  cursor: pointer;
  vertical-align: super;
  line-height: 1.2;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}
[data-theme="dark"] .fb-cite-ref { color: #b9f5ed; }
.fb-cite-ref:hover { background: rgba(0, 191, 179, 0.36); }
.fb-cite-ref.fb-cite-ref-flash {
  background: rgba(254, 197, 20, 0.4);
  border-color: rgba(254, 197, 20, 0.6);
  color: #b6890a;
}
[data-theme="dark"] .fb-cite-ref.fb-cite-ref-flash { color: #ffe18a; }

/* ============================================================ Citations column */
.fb-cites {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 14px;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}
.fb-cites-head {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 4px 4px;
  border-bottom: 1px dashed var(--border);
}
.fb-cite-card {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  padding: 12px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--panel-2);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  scroll-margin-top: 12px;
}
.fb-cite-card:hover {
  border-color: rgba(0, 119, 204, 0.45);
  background: rgba(0, 119, 204, 0.08);
}
.fb-cite-card.fb-cite-card-flash {
  border-color: rgba(254, 197, 20, 0.6);
  background: rgba(254, 197, 20, 0.12);
  animation: fb-flash 1.4s ease-out;
}
@keyframes fb-flash {
  0% { box-shadow: 0 0 0 0 rgba(254, 197, 20, 0.4); }
  60% { box-shadow: 0 0 0 6px rgba(254, 197, 20, 0); }
  100% { box-shadow: 0 0 0 0 rgba(254, 197, 20, 0); }
}
.fb-cite-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--teal-soft);
  color: var(--teal);
  font-weight: 700;
  font-size: 12.5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
[data-theme="dark"] .fb-cite-num { color: #b9f5ed; }
.fb-cite-body { min-width: 0; }
.fb-cite-title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin: 0 0 3px;
  word-break: break-word;
}
.fb-cite-section {
  font-size: 11.5px;
  color: var(--muted);
  margin-bottom: 5px;
  word-break: break-word;
}
.fb-cite-section::before {
  content: "section: ";
  color: var(--muted);
}
.fb-cite-snippet {
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-2);
  margin-bottom: 6px;
  word-break: break-word;
}
.fb-cite-url {
  font-size: 10.5px;
  color: var(--primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  word-break: break-all;
}

/* ============================================================ Loading + error states */
.fb-loading {
  grid-column: 1 / -1;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 12px;
  font-size: 13.5px;
  color: var(--muted);
}
.fb-loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border);
  border-top-color: var(--primary-hi);
  animation: ab-spin 0.7s linear infinite;
  flex: 0 0 14px;
}

.fb-error {
  grid-column: 1 / -1;
  padding: 16px 18px;
  border: 1px solid rgba(255, 102, 102, 0.4);
  background: rgba(255, 102, 102, 0.08);
  border-radius: 12px;
  color: #c2185b;
  font-size: 13.5px;
  line-height: 1.5;
}
[data-theme="dark"] .fb-error { color: #ffd0d0; }
.fb-error strong { color: #c2185b; }
[data-theme="dark"] .fb-error strong { color: #ffc1c1; }
.fb-error code {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
}

/* ============================================================ Raw hits expandable */
.fb-raw {
  grid-column: 1 / -1;
  margin-top: 4px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 12.5px;
}
.fb-raw summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.fb-raw summary:hover { color: var(--ink); }
.fb-raw pre {
  margin: 8px 0 0;
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--code-border);
  padding: 12px;
  border-radius: 8px;
  font-size: 11.5px;
  overflow-x: auto;
  max-height: 360px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ============================================================ Responsive: tablet (769-1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  /* Two-column stays, just shrink the citation column threshold. */
  .fb-result { grid-template-columns: minmax(0, 1.4fr) minmax(240px, 1fr); gap: 16px; }
}

/* ============================================================ Responsive: mobile (<= 768px) */
@media (max-width: 768px) {
  .fe-brain-page .container { max-width: 100%; }

  /* Single column: answer first, citations below; do not stick to viewport. */
  .fb-result { grid-template-columns: 1fr; gap: 14px; }
  .fb-cites {
    position: static;
    max-height: none;
    overflow-y: visible;
    padding: 14px 12px;
  }
  .fb-cite-card { padding: 10px; }
  .fb-cite-title { font-size: 13px; }
  .fb-cite-snippet { font-size: 11.5px; }

  /* Answer column: smaller padding, keep word-breaking for long URLs. */
  .fb-answer { padding: 16px 16px; }
  .fb-answer-body { font-size: 14px; }
  .fb-answer-q { white-space: normal; max-width: 100%; }

  /* Raw hits stays scrollable on small screens. */
  .fb-raw pre { max-height: 280px; }
}