:root {
  --paper: #ffffff;
  --code-bg: #fafaf8;
  --mono: "IBM Plex Mono", monospace;
  --sans: "Outfit", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

.notebook {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}
.embedded .notebook {
  width: auto;
  margin-top: 0;
  margin-right: 1.8rem;
  margin-bottom: 1.8rem;
  padding: 0;
}

/* ── Header ──────────────────────────────────────────────── */
.doc-header {
  margin-bottom: 1.8rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-black-bright);
}

.kicker {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-black-bright);
}

.doc-header h1 {
  margin: 0 0 10px;
  font-size: 30px;
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.subtitle {
  margin: 0;
  color: var(--color-black-bright);
  font-size: 15px;
  max-width: 56ch;
}

/* ── Toolbar ─────────────────────────────────────────────── */
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 8px;
}

.toolbar input {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--mono);
  font-size: 14px;
  padding: 10px 14px;
  border: var(--border-width) solid var(--border-color);
  border-radius: 0px;
  background: var(--paper);
  color: var(--color-black);
}

.toolbar input:focus {
  outline: none;
  border-color: var(--color-blue);
}

.run-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.toolbar-hint {
  margin: 0 0 28px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--color-black-bright);
}

/* ── Cells ───────────────────────────────────────────────── */
.cells {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cell {
  border: 1px solid var(--color-black-bright);
  background: var(--paper);
  overflow: hidden;
}

.cell-line {
  display: column;
  align-items: flex-start;
  padding: 12px 16px;
  p {
    color: var(--color-black);
    font-size: 80%;
  }
  pre {
    margin-bottom: 0.5rem;
  }
}

.cell-in {
  background: var(--code-bg);
}

.prompt {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--color-black-bright);
  user-select: none;
  padding-top: 1px;
}

.cell-body {
  flex: 1 1 auto;
  min-width: 0;
}

.in-code {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--color-black);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* The output area only appears once a cell has run, like Jupyter. */
.cell.idle .cell-out {
  display: none;
}

.out-status {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--color-black-bright);
  margin-bottom: 8px;
  min-height: 1em;
}

.cell.running {
  border-left-color: var(--color-blue);
}
.cell.running .prompt {
  color: var(--color-blue);
}
.cell.running .out-status {
  color: var(--color-blue);
  animation: breathe 1.2s ease-in-out infinite;
}

.cell.done .out-status {
  color: var(--color-black-bright);
}
.cell.error {
  border-left-color: var(--color-red);
}
.cell.error .out-status {
  color: var(--color-red);
}

@keyframes breathe {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.cell-out .out-content {
  animation: fade-in 0.25s ease;
}

/* Raw code / JSON / Turtle output */
.raw {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--color-black);
  white-space: pre;
  background: var(--code-bg);
  border: 1px solid var(--color-black-bright);
  padding: 12px 16px;
  max-height: 420px;
  overflow: auto;
}

.note {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--color-black-bright);
  line-height: 1.55;
}

.error-box {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--color-red);
  border: 1px solid var(--color-red);
  padding: 12px 16px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Footer ──────────────────────────────────────────────── */
.doc-footer {
  margin-top: 36px;
  padding-top: 18px;
  border-top: var(--border-width) solid var(--border-color);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--color-black-bright);
}

.run-btn {
  display: inline-block;
  background: var(--color-bg-primary);
  color: var(--color-blue);
  padding: 0.6rem;
  border: var(--border-width) solid var(--color-blue);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  &:hover {
    border-color: var(--color-cyan);
    text-decoration: none;
    color: var(--color-cyan);
  }
}
@media (max-width: 480px) {
  .notebook {
    padding: 28px 16px 48px;
  }
  .doc-header h1 {
    font-size: 25px;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .run-btn {
    width: 100%;
  }
}
h3.embedded {
  display: none;
}
.embedded {
  padding-right: 1.8rem;
  padding-left: 1.8rem;
  header,
  footer {
    display: none;
  }
  h3.embedded {
    display: block;
  }
}