/* ──────────────────────────────────────────────────────────────
   Notebook Viewer — styled to match the site's dark theme
   Mirrors JupyterLab's layout: gutter + cell body side by side
   ────────────────────────────────────────────────────────────── */

:root {
  --nb-bg:          #0d0d12;
  --nb-cell-bg:     #131320;
  --nb-border:      rgba(108, 63, 255, 0.15);
  --nb-code-bg:     #0a0a15;
  --nb-out-bg:      #0e0e1a;
  --nb-gutter-w:    52px;
  --nb-max-w:       900px;
  --nb-purple:      #6C3FFF;
  --nb-purple-soft: rgba(108, 63, 255, 0.25);
  --nb-text:        #e2e2ee;
  --nb-muted:       #8A8A9A;
  --nb-green:       #3DDC97;
  --nb-red:         #FF6B6B;
  --nb-mono:        'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Page shell ── */
.nb-body { background: var(--nb-bg); min-height: 100vh; }

.nb-main {
  max-width: var(--nb-max-w);
  margin: 0 auto;
  padding: 6rem 1rem 4rem;
}

/* ── Breadcrumb in nav ── */
.nb-breadcrumb {
  font-size: 0.78rem;
  color: var(--nb-muted);
  margin-left: 1rem;
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nb-breadcrumb .fas { font-size: 0.65rem; opacity: 0.5; }

/* ── Error state ── */
.nb-error {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--nb-muted);
}
.nb-error .fas { font-size: 2.5rem; color: var(--nb-red); margin-bottom: 1rem; }
.nb-error p { font-size: 1rem; margin-bottom: 1.5rem; }
.nb-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 999px;
  background: var(--nb-purple-soft);
  color: var(--nb-purple);
  text-decoration: none;
  font-size: 0.88rem;
  transition: background .2s;
}
.nb-back-btn:hover { background: rgba(108, 63, 255, 0.4); }

/* ── Top toolbar ── */
.nb-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--nb-cell-bg);
  border: 1px solid var(--nb-border);
  border-radius: 10px 10px 0 0;
  margin-bottom: 0;
  gap: 12px;
  flex-wrap: wrap;
}

.nb-topbar-left, .nb-topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nb-kernel-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8rem;
  color: var(--nb-text);
  background: rgba(61, 220, 151, 0.1);
  border: 1px solid rgba(61, 220, 151, 0.25);
  border-radius: 999px;
  padding: 4px 12px;
}
.nb-kernel-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--nb-green);
  box-shadow: 0 0 6px var(--nb-green);
  flex-shrink: 0;
}
.nb-kernel-ver {
  font-family: var(--nb-mono);
  font-size: 0.72rem;
  color: var(--nb-muted);
}

.nb-raw-link, .nb-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background .2s;
  text-decoration: none;
  color: var(--nb-muted);
  background: transparent;
  border: 1px solid rgba(255,255,255,.08);
  font-family: inherit;
}
.nb-raw-link:hover, .nb-copy-btn:hover {
  background: rgba(255,255,255,.05);
  color: var(--nb-text);
}

/* ── Cell list ── */
.nb-cells {
  border: 1px solid var(--nb-border);
  border-top: none;
  border-radius: 0 0 10px 10px;
  overflow: hidden;
}

/* ── Individual cell ── */
.nb-cell {
  display: flex;
  border-bottom: 1px solid var(--nb-border);
  position: relative;
  transition: background .15s;
}
.nb-cell:last-child { border-bottom: none; }
.nb-cell:hover { background: rgba(108, 63, 255, 0.03); }

/* ── Gutter (left column with [n]) ── */
.nb-cell-gutter {
  width: var(--nb-gutter-w);
  flex-shrink: 0;
  padding: 14px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 16px;
  border-right: 1px solid var(--nb-border);
  background: var(--nb-code-bg);
}

.nb-exec-count {
  font-family: var(--nb-mono);
  font-size: 0.72rem;
  color: var(--nb-muted);
  white-space: nowrap;
  user-select: none;
}
.nb-out-count { color: rgba(108, 63, 255, 0.6); }

/* ── Cell body ── */
.nb-cell-body {
  flex: 1;
  min-width: 0;
}

/* ── Code cell ── */
.nb-cell-code { background: var(--nb-code-bg); }

.nb-code-wrap pre {
  margin: 0;
  padding: 14px 18px;
  background: transparent !important;
  font-family: var(--nb-mono);
  font-size: 0.84rem;
  line-height: 1.65;
  overflow-x: auto;
}
.nb-code-wrap pre code {
  background: transparent !important;
  padding: 0 !important;
}

/* ── Outputs ── */
.nb-outputs {
  border-top: 1px solid var(--nb-border);
}

.nb-out-gutter {
  display: none; /* hide duplicate gutter inside outputs for cleanliness */
}

/* Stream / plain text output */
pre.nb-stream {
  margin: 0;
  padding: 10px 18px;
  font-family: var(--nb-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--nb-text);
  background: var(--nb-out-bg);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
pre.nb-stream-err { color: var(--nb-red); background: rgba(255, 107, 107, 0.05); }

/* Rich output (images, tables, html) */
.nb-rich-out {
  padding: 12px 18px;
  background: var(--nb-out-bg);
}
.nb-img-out {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--nb-border);
}

/* DataFrame tables from pandas */
.nb-html-out { overflow-x: auto; }
.nb-html-out table {
  border-collapse: collapse;
  font-family: var(--nb-mono);
  font-size: 0.78rem;
  color: var(--nb-text);
  width: auto;
}
.nb-html-out th {
  background: rgba(108, 63, 255, 0.15);
  color: var(--nb-purple);
  padding: 6px 12px;
  text-align: left;
  border: 1px solid var(--nb-border);
  font-weight: 600;
}
.nb-html-out td {
  padding: 5px 12px;
  border: 1px solid var(--nb-border);
}
.nb-html-out tr:nth-child(even) td { background: rgba(255,255,255,.02); }
.nb-html-out tr:hover td { background: rgba(108, 63, 255, 0.06); }

/* ── Markdown cell ── */
.nb-cell-markdown {
  background: var(--nb-cell-bg);
}
.nb-cell-markdown .nb-md-content {
  padding: 18px 22px;
  flex: 1;
  color: var(--nb-text);
  line-height: 1.75;
  font-size: 0.95rem;
  overflow-x: auto;
  width: 100%;
}

/* Markdown typography */
.nb-md-content h1 { font-size: 1.6rem; font-weight: 700; margin: 0.4em 0 0.6em; color: #fff; border-bottom: 1px solid var(--nb-border); padding-bottom: 0.4em; }
.nb-md-content h2 { font-size: 1.25rem; font-weight: 600; margin: 1.2em 0 0.5em; color: #fff; }
.nb-md-content h3 { font-size: 1.05rem; font-weight: 600; margin: 1em 0 0.4em; color: var(--nb-text); }
.nb-md-content h4, .nb-md-content h5 { font-size: 0.95rem; font-weight: 600; margin: 0.8em 0 0.3em; }
.nb-md-content p  { margin: 0.5em 0; }
.nb-md-content ul, .nb-md-content ol { padding-left: 1.5em; margin: 0.5em 0; }
.nb-md-content li { margin: 0.25em 0; }
.nb-md-content a  { color: var(--nb-purple); text-decoration: none; }
.nb-md-content a:hover { text-decoration: underline; }
.nb-md-content strong { color: #fff; font-weight: 600; }
.nb-md-content em { color: rgba(226,226,238,.75); font-style: italic; }
.nb-md-content code {
  font-family: var(--nb-mono);
  font-size: 0.82em;
  background: rgba(108, 63, 255, 0.12);
  color: #c9b7ff;
  padding: 1px 6px;
  border-radius: 4px;
}
.nb-md-content pre {
  background: var(--nb-code-bg);
  border: 1px solid var(--nb-border);
  border-radius: 7px;
  padding: 12px 16px;
  overflow-x: auto;
  margin: 0.8em 0;
}
.nb-md-content pre code {
  background: transparent;
  padding: 0;
  font-size: 0.83rem;
  color: var(--nb-text);
}
.nb-md-content blockquote {
  border-left: 3px solid var(--nb-purple);
  margin: 0.8em 0;
  padding: 6px 16px;
  background: var(--nb-purple-soft);
  border-radius: 0 6px 6px 0;
}
.nb-md-content blockquote p { margin: 0; color: var(--nb-muted); }
.nb-md-content hr {
  border: none;
  border-top: 1px solid var(--nb-border);
  margin: 1.2em 0;
}
.nb-md-content img { max-width: 100%; border-radius: 6px; }
.nb-md-content table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
  margin: 0.8em 0;
}
.nb-md-content th {
  background: rgba(108, 63, 255, 0.15);
  color: var(--nb-purple);
  padding: 7px 12px;
  text-align: left;
  border: 1px solid var(--nb-border);
}
.nb-md-content td {
  padding: 6px 12px;
  border: 1px solid var(--nb-border);
}

/* ── Raw cell ── */
.nb-cell-raw { background: var(--nb-code-bg); opacity: 0.7; }

/* ── Mobile ── */
@media (max-width: 600px) {
  :root { --nb-gutter-w: 36px; }
  .nb-topbar { flex-direction: column; align-items: flex-start; }
  .nb-breadcrumb { display: none; }
  .nb-code-wrap pre { font-size: 0.76rem; }
  pre.nb-stream { font-size: 0.74rem; }
}