/* Portfolio book — matches Minimal Mistakes / academicpages default_light theme.
   Uses :root variables from main.css (--global-*). All rules scoped under .portfolio-book-wrap. */

.portfolio-book-main#main {
  margin-top: 2em;
  padding-left: 1em;
  padding-right: 1em;
  animation: intro 0.3s both;
  animation-delay: 0.35s;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 1280px) {
  .portfolio-book-main#main {
    max-width: 1280px;
  }
}

.portfolio-book-wrap {
  box-sizing: border-box;
  /* Same typeface as the rest of the site (body / $global-font-family in main.scss) */
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: var(--global-text-color);
  background: transparent;
  width: 100%;
  padding: 0 0 2em;
  -webkit-font-smoothing: antialiased;
  /* Local tokens derived from theme */
  --pb-accent: var(--global-base-color);
  --pb-accent-hover: var(--global-link-color-hover);
  --pb-muted: var(--global-text-color-light);
  --pb-bg: var(--global-bg-color);
  --pb-bg-subtle: var(--global-thead-color);
  --pb-border: var(--global-border-color);
  --pb-border-strong: var(--global-dark-border-color);
  --pb-code-bg: var(--global-code-background-color);
  --pb-code-fg: var(--global-code-text-color);
  --pb-shadow: 0 1px 1px rgba(0, 0, 0, 0.125);
}

.portfolio-book-wrap *,
.portfolio-book-wrap *::before,
.portfolio-book-wrap *::after {
  box-sizing: border-box;
}

.portfolio-book-wrap .portfolio-container {
  width: 100%;
  max-width: 100%;
  background: var(--pb-bg);
  border: 1px solid var(--pb-border);
  border-radius: 4px;
  box-shadow: var(--pb-shadow);
  margin: 0;
  overflow: hidden;
}


/* Page variants + small spacing helpers */
.portfolio-book-wrap .p-book-page--cover {
  padding-top: 4rem;
  padding-bottom: 3rem;
}
@media (min-width: 768px) {
  .portfolio-book-wrap .p-book-page--cover {
    padding-top: 5rem;
    padding-bottom: 3.5rem;
  }
}
.portfolio-book-wrap .pb-mb-xs { margin-bottom: 0.5rem; }
.portfolio-book-wrap .pb-mb-sm { margin-bottom: 0.6rem; }
.portfolio-book-wrap .pb-mb-md { margin-bottom: 1rem; }
.portfolio-book-wrap .p-book-page {
  width: 100%;
  padding: 2.25rem 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  border: none;
}

@media (min-width: 768px) {
  .portfolio-book-wrap .p-book-page {
    padding: 2.75rem 3rem;
  }
}

.portfolio-book-wrap .p-book-page:not(:last-child) {
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--pb-border);
  position: relative;
}

.portfolio-book-wrap .p-book-page:not(:last-child)::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--pb-accent), transparent);
  opacity: 0.35;
}

.portfolio-book-wrap .page-gap {
  display: none;
}

/* Typography */
.portfolio-book-wrap .proj-num {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--pb-accent);
  letter-spacing: 0.06em;
  text-transform: none;
  margin-bottom: 0.5rem;
  border: none;
}

.portfolio-book-wrap .proj-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--global-text-color);
  line-height: 1.15;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  border: none;
}

.portfolio-book-wrap .proj-sub {
  font-size: 0.9375rem;
  color: var(--pb-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
  font-weight: 500;
  border: none;
}

.portfolio-book-wrap .body-text {
  font-size: 1rem;
  color: var(--global-text-color);
  line-height: 1.65;
  margin-bottom: 0.6rem;
  font-weight: 400;
  border: none;
}

.portfolio-book-wrap .section-head {
  font-size: 1rem;
  font-weight: 700;
  color: var(--pb-accent);
  margin-bottom: 0.5rem;
  margin-top: 1.25rem;
  letter-spacing: 0.02em;
  text-transform: none;
  border: none;
}

.portfolio-book-wrap .bullet,
.portfolio-book-wrap p.bullet {
  font-size: 0.9375rem;
  color: var(--global-text-color);
  line-height: 1.65;
  padding-left: 1rem;
  text-indent: -1rem;
  margin-bottom: 0.35rem;
  border: none;
}

.portfolio-book-wrap .bullet::before,
.portfolio-book-wrap p.bullet::before {
  content: "• ";
  color: var(--pb-accent);
  font-weight: 600;
}

.portfolio-book-wrap .caption {
  font-size: 0.8125rem;
  color: var(--pb-muted);
  text-align: center;
  margin-top: 0.35rem;
  margin-bottom: 0.6rem;
  font-style: italic;
  border: none;
}

.portfolio-book-wrap .small-grey {
  font-size: 0.8125rem;
  color: var(--pb-muted);
  border: none;
}

.portfolio-book-wrap .gold-rule {
  border: none;
  border-top: 2px solid var(--pb-accent);
  margin: 0.75rem 0 1rem;
  opacity: 0.85;
}

.portfolio-book-wrap .rule-thin {
  border: none;
  border-top: 1px solid var(--pb-border-strong);
  margin: 0.5rem 0 0.75rem;
}

/* Tags */
.portfolio-book-wrap .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.25rem;
}

.portfolio-book-wrap .tag {
  background: var(--pb-bg-subtle);
  border: 1px solid var(--pb-border-strong);
  border-radius: 4px;
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  color: var(--global-text-color);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.portfolio-book-wrap .tag:hover {
  border-color: var(--pb-accent);
  background: color-mix(in srgb, var(--pb-accent) 8%, var(--pb-bg));
}

/* Placeholders */
.portfolio-book-wrap .img-placeholder {
  background: linear-gradient(135deg, var(--pb-bg-subtle) 0%, var(--pb-bg) 100%);
  border: 1px solid var(--pb-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pb-muted);
  font-size: 0.8125rem;
  font-style: italic;
  border-radius: 4px;
  min-height: 4rem;
}

.portfolio-book-wrap .img-placeholder:hover {
  border-color: var(--pb-accent);
}

/* Natural aspect ratio — avoids cropping from fixed height + object-fit: cover */
.portfolio-book-wrap .portfolio-hero-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid var(--pb-border);
  margin: 0 0 1rem;
  display: block;
  background: var(--pb-bg-subtle);
}

.portfolio-book-wrap .portfolio-thumb-img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  object-position: center;
  border-radius: 4px;
  border: 1px solid var(--pb-border);
  display: block;
  background: var(--pb-bg-subtle);
}

.portfolio-book-wrap .portfolio-thumb-img--sm {
  height: 70px;
}

/* Project page two-up photos (e.g. BeagleBone hardware + terminal) */
.portfolio-book-wrap .portfolio-dual-img {
  width: 100%;
  height: 180px;
  object-fit: contain;
  object-position: center;
  border-radius: 4px;
  border: 1px solid var(--pb-border);
  display: block;
  background: var(--pb-bg-subtle);
}

/* Full-width diagram — natural height (no max-height) so labels stay readable */
.portfolio-book-wrap .portfolio-arch-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-bottom: 0.25rem;
  border-radius: 4px;
  border: 1px solid var(--pb-border);
  display: block;
  background: var(--pb-bg-subtle);
}

/* Data tables */
.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin: 1rem 0;
  border: 1px solid var(--pb-border);
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) th {
  background: var(--pb-accent);
  color: #fff;
  font-weight: 700;
  padding: 0.65rem 0.85rem;
  text-align: left;
  letter-spacing: 0.03em;
  text-transform: none;
  font-size: 0.75rem;
  border: 1px solid var(--pb-border-strong);
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) td {
  color: var(--global-text-color);
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--pb-border);
  font-weight: 400;
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) tr:nth-child(odd) td {
  background: var(--pb-bg);
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) tr:nth-child(even) td {
  background: var(--pb-bg-subtle);
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table).plain-table td:first-child {
  color: var(--pb-accent);
  font-weight: 700;
  background: var(--pb-bg-subtle);
  font-size: 0.8125rem;
}

.portfolio-book-wrap table:not(.cover-idx):not(.arch-table) tr.highlight td {
  background: color-mix(in srgb, var(--pb-accent) 14%, var(--pb-bg));
  color: var(--global-text-color);
  font-weight: 500;
}

/* Arch table */
.portfolio-book-wrap .arch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin: 1rem 0;
  border: 1px solid var(--pb-border);
}

.portfolio-book-wrap .arch-table th {
  background: var(--pb-accent);
  color: #fff;
  font-weight: 700;
  padding: 0.65rem 0.85rem;
  text-align: left;
  text-transform: none;
  font-size: 0.75rem;
  border-bottom: 1px solid var(--pb-border-strong);
}

.portfolio-book-wrap .arch-table td {
  color: var(--global-text-color);
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--pb-border);
}

.portfolio-book-wrap .arch-table tr:nth-child(odd) td {
  background: var(--pb-bg);
}

.portfolio-book-wrap .arch-table tr:nth-child(even) td {
  background: var(--pb-bg-subtle);
}

/* Stat boxes */
.portfolio-book-wrap .stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.portfolio-book-wrap .stat-box {
  flex: 1 1 120px;
  background: var(--pb-bg-subtle);
  border: 1px solid var(--pb-border);
  padding: 1rem 0.65rem;
  text-align: center;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.portfolio-book-wrap .stat-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--pb-accent), transparent);
  opacity: 0.5;
}

.portfolio-book-wrap .stat-box:hover {
  border-color: var(--pb-accent);
  box-shadow: var(--pb-shadow);
}

.portfolio-book-wrap .stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--pb-accent);
  line-height: 1.2;
  letter-spacing: -0.02em;
  border: none;
}

.portfolio-book-wrap .stat-label {
  font-size: 0.6875rem;
  color: var(--pb-muted);
  margin-top: 0.35rem;
  white-space: pre-line;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0.04em;
  border: none;
}

/* Code */
.portfolio-book-wrap .code-block {
  background: var(--pb-code-bg);
  border: 1px solid var(--pb-border);
  border-left: 3px solid var(--pb-accent);
  padding: 1rem 1.1rem;
  margin: 1rem 0;
  border-radius: 4px;
}

.portfolio-book-wrap .code-block pre {
  /* Match main.scss: code, kbd, samp, pre { font-family: $monospace } */
  font-family: Monaco, Consolas, "Lucida Console", monospace;
  font-size: 0.8125rem;
  color: var(--pb-code-fg);
  line-height: 1.6;
  white-space: pre;
  margin: 0;
  font-weight: 500;
  border: none;
  overflow-x: auto;
}

/* Grid & cards */
.portfolio-book-wrap .two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

@media (min-width: 600px) {
  .portfolio-book-wrap .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

.portfolio-book-wrap .two-col-3 {
  display: grid;
  grid-template-columns: 40px 1fr 1fr;
  gap: 0;
}

.portfolio-book-wrap .card {
  background: var(--pb-bg-subtle);
  border: 1px solid var(--pb-border);
  padding: 1rem 1.1rem;
  border-radius: 4px;
  transition: border-color 0.2s ease;
}

.portfolio-book-wrap .card:hover {
  border-color: var(--pb-accent);
}

.portfolio-book-wrap .card-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--pb-accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
  border: none;
}

.portfolio-book-wrap .step-table {
  width: 100%;
  border: 1px solid var(--pb-border);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 4px;
  overflow: hidden;
}

.portfolio-book-wrap .step-table td {
  padding: 0.5rem 0.75rem;
  border: none;
  border-bottom: 1px solid var(--pb-border);
  font-size: 0.8125rem;
  vertical-align: top;
}

.portfolio-book-wrap .step-table td:first-child {
  width: 120px;
  color: var(--pb-accent);
  font-weight: 700;
  background: var(--pb-bg-subtle);
  font-size: 0.75rem;
}

.portfolio-book-wrap .step-table td:last-child {
  color: var(--global-text-color);
  background: var(--pb-bg);
}

.portfolio-book-wrap .step-table tr:nth-child(even) td {
  background: var(--pb-bg-subtle);
}

.portfolio-book-wrap .step-table tr:last-child td {
  border-bottom: none;
}

/* Callouts & inline layout helpers (replace dark-theme inline styles in HTML) */
.portfolio-book-wrap .pb-callout {
  border: 1px solid var(--pb-border);
  background: var(--pb-bg-subtle);
  padding: 0.625rem 0.75rem;
  border-radius: 4px;
}
.portfolio-book-wrap .pb-callout__title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--global-text-color);
  margin-bottom: 0.35rem;
}
.portfolio-book-wrap .pb-step-label {
  color: var(--pb-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.portfolio-book-wrap .pb-subsection-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--global-text-color);
  margin-bottom: 0.5rem;
}
.portfolio-book-wrap .pb-stack-sm {
  margin-bottom: 0.6rem;
}
.portfolio-book-wrap .pb-stack-sm--loose {
  margin-bottom: 1rem;
}
.portfolio-book-wrap .section-head--in-flow {
  font-size: 1rem;
  margin-top: 1.25rem;
}
.portfolio-book-wrap .pb-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.375rem;
  margin-bottom: 0.625rem;
}
.portfolio-book-wrap .pb-block-spaced {
  margin-top: 1.25rem;
}

/* Cover */
.portfolio-book-wrap .cover-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--global-text-color) 0%, var(--pb-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border: none;
}

.portfolio-book-wrap .cover-sub {
  font-size: 1.25rem;
  color: var(--pb-muted);
  text-align: center;
  margin-top: 0.35rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: none;
}

.portfolio-book-wrap .cover-meta {
  font-size: 0.875rem;
  color: var(--pb-muted);
  text-align: center;
  margin-top: 1rem;
  border: none;
}

.portfolio-book-wrap .cover-footer {
  font-size: 0.8125rem;
  color: var(--pb-muted);
  text-align: center;
  margin-top: auto;
  padding-top: 2.5rem;
  border: none;
}

.portfolio-book-wrap .cover-hr {
  border: none;
  border-top: 2px solid var(--pb-accent);
  width: 70%;
  margin: 1rem auto 1rem;
  opacity: 0.85;
}

.portfolio-book-wrap .cover-idx {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 2rem;
  border: 1px solid var(--pb-border-strong);
  border-radius: 4px;
  overflow: hidden;
}

.portfolio-book-wrap .cover-idx td {
  padding: 0.85rem 1rem;
  border: none;
  border-bottom: 1px solid var(--pb-border);
  font-size: 0.9375rem;
  vertical-align: middle;
  color: var(--global-text-color);
}

.portfolio-book-wrap .cover-idx tr:last-child td {
  border-bottom: none;
}

.portfolio-book-wrap .cover-idx tr:nth-child(even) td {
  background: var(--pb-bg-subtle);
}

.portfolio-book-wrap .cover-idx tr:nth-child(odd) td {
  background: var(--pb-bg);
}

.portfolio-book-wrap .cover-idx tr:hover td {
  background: color-mix(in srgb, var(--pb-accent) 6%, var(--pb-bg));
}

.portfolio-book-wrap .cover-idx .idx-num {
  color: var(--pb-accent);
  font-weight: 800;
  font-size: 1.125rem;
  width: 50px;
}

.portfolio-book-wrap .cover-idx .idx-title {
  color: var(--global-text-color);
  font-weight: 600;
  width: auto;
  max-width: 340px;
  letter-spacing: 0.02em;
}

.portfolio-book-wrap .cover-idx .idx-dom {
  color: var(--pb-muted);
  font-size: 0.8125rem;
  font-weight: 500;
}