/* =========================
   Shared Components for CS280A
   ========================= */

/* =========================
   Discussion Card
   ========================= */
.discussion-card {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--discussion-bg);
  border: 1px solid var(--discussion-border);
  border-left: 4px solid var(--discussion-accent);
  border-radius: 10px;
  box-shadow: none;
  font-family: "Times New Roman", Times, serif;
}

.discussion-card h3 {
  margin: 0 0 8px 0;
  font-weight: 700;
  color: var(--discussion-accent);
  font-family: "Times New Roman", Times, serif;
}

.discussion-card p {
  margin: 0;
  line-height: 1.7;
  font-size: 1rem;
}

/* =========================
   Gallery Variants
   ========================= */
.gallery.gallery-large img {
  max-width: 360px;
}

.gallery.gallery-wide img {
  max-width: 420px;
}

@media (max-width: 640px) {
  .gallery.gallery-wide img {
    max-width: 45vw;
  }
}

/* Hover zoom container */
.gallery > div,
.gallery figure {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
}

/* Zoomable images */
.gallery img.zoomable {
  transition: transform 0.45s cubic-bezier(0.22, 0.78, 0.23, 0.99), filter 0.45s ease;
  will-change: transform;
  cursor: zoom-in;
  display: block;
  backface-visibility: hidden;
}

.gallery img.zoomable:hover,
.gallery img.zoomable:focus {
  transform: scale(1.075);
  z-index: 2;
  filter: saturate(1.05);
}

.gallery img.zoomable:focus {
  outline: 2px solid var(--discussion-accent);
  outline-offset: 2px;
}

/* =========================
   Trip Gallery (3x2 grid)
   ========================= */
.trip-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.trip-gallery figure {
  margin: 0;
}

.trip-gallery img.responsive {
  width: 100%;
  height: auto;
}

@media (max-width: 820px) {
  .trip-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .trip-gallery {
    grid-template-columns: 1fr;
  }
}

/* =========================
   Change Explainer (Arrow)
   ========================= */
.change-explainer {
  margin: 14px auto 4px;
  max-width: 920px;
}

.change-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 0px;
}

.arrow-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
}

.arrow-row .label-left,
.arrow-row .label-right {
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}

.arrow-row .arrow {
  position: relative;
  height: 0;
  border-top: 2px solid var(--text-muted);
}

.arrow-row .arrow::after {
  content: "";
  position: absolute;
  right: -2px;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid var(--text-muted);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

@media (max-width: 640px) {
  .change-caption {
    font-size: 0.9rem;
  }
  .arrow-row {
    gap: 8px;
  }
}

/* =========================
   Dolly Zoom Image
   ========================= */
img.dollyzoom {
  max-width: 450px;
  width: 100%;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* =========================
   Lightbox
   ========================= */
.lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1600;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

.lightbox.open {
  display: flex;
}

.lightbox .lb-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.74);
  backdrop-filter: blur(2px);
  animation: lbFade 0.25s ease;
}

@keyframes lbFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox .lb-inner {
  position: relative;
  max-width: 92vw;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: lbPop 0.28s cubic-bezier(0.22, 0.78, 0.23, 0.99);
}

@keyframes lbPop {
  0% { transform: scale(0.94); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.lightbox img {
  max-width: 92vw;
  max-height: 82vh;
  border-radius: 8px;
  box-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.12);
  object-fit: contain;
  background: #111;
}

.lb-caption {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 80vw;
  line-height: 1.35;
}

.lb-close {
  position: absolute;
  top: -42px;
  right: -10px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-size: 24px;
  width: 40px;
  height: 40px;
  line-height: 36px;
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background 0.25s;
}

.lb-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* =========================
   Multi-Align Grid
   ========================= */
.multi-align-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  margin-top: 10px;
}

.multi-align-grid .card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 4px 0 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.multi-align-grid .img-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: none;
  position: relative;
}

.multi-align-grid .img-frame img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
  background: transparent;
  transition: transform 0.42s cubic-bezier(0.22, 0.78, 0.23, 0.99), filter 0.42s ease;
  cursor: zoom-in;
  will-change: transform;
  transform-origin: center center;
}

.multi-align-grid .img-frame:hover img.zoomable,
.multi-align-grid .img-frame:focus-within img.zoomable {
  transform: scale(1.08);
  filter: saturate(1.05);
}

.multi-align-grid p {
  margin-top: 4px;
  font-size: 0.66rem;
  line-height: 1.1;
  text-align: center;
  color: var(--text-muted);
  word-break: break-word;
}

.multi-align-grid img.responsive {
  max-width: 100%;
}

.multi-align-grid .img-frame button.lb-open-btn {
  position: absolute;
  inset: 0;
  background: transparent;
  border: none;
  padding: 0;
  cursor: zoom-in;
  font-size: 0;
}

/* =========================
   BW Grid (Bells & Whistles)
   ========================= */
.bw-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin-top: 10px;
}

.bw-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 6px 8px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bw-frame {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: transparent;
  border: none;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bw-frame img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
  background: transparent;
  transition: transform 0.45s cubic-bezier(0.22, 0.78, 0.23, 0.99), filter 0.45s ease;
  cursor: zoom-in;
  will-change: transform;
}

.bw-frame:hover img.zoomable,
.bw-frame:focus-within img.zoomable {
  transform: scale(1.06);
  filter: saturate(1.05);
}

.bw-cap {
  margin: 6px 0 0;
  font-size: 0.7rem;
  line-height: 1.15;
  text-align: center;
  color: var(--text-muted);
  word-break: break-word;
}

@media (max-width: 560px) {
  .bw-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
}

/* =========================
   Figure Center
   ========================= */
.figure-center {
  max-width: 980px;
  margin: 2rem auto;
  text-align: center;
}

.figure-center img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--card-line);
  background: var(--content-bg);
  box-shadow: none;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] .figure-center img {
  background: #0d1117;
  border-color: #30363d;
}

.figure-center img:hover {
  transform: scale(1.02);
}

.figure-center figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.6rem;
  line-height: 1.4;
}

.figure-center img.max-h-560 {
  max-height: 560px;
  object-fit: contain;
}

.figure-center.narrow {
  max-width: 640px;
}

.figure-center img.zoomable {
  cursor: zoom-in;
}

/* Size modifiers */
.figure-center.shrink-80 img { width: 80%; }
.figure-center.shrink-70 img { width: 70%; }
.figure-center.shrink-60 img { width: 60%; }
.figure-center.shrink-50 img { width: 50%; }

@media (max-width: 680px) {
  .figure-center.shrink-80 img,
  .figure-center.shrink-70 img,
  .figure-center.shrink-60 img,
  .figure-center.shrink-50 img {
    width: 100%;
  }
}

/* =========================
   Intro Flex Layout
   ========================= */
.intro-flex {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  margin: 24px 0;
}

.intro-img {
  flex: 0 0 140px;
  text-align: center;
}

.intro-img img {
  width: 120px;
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.img-cap {
  font-size: 0.95em;
  color: var(--text-muted);
  margin-top: 6px;
}

.intro-text {
  flex: 1 1 0;
  min-width: 0;
  align-self: center;
}

@media (max-width: 700px) {
  .intro-flex {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .intro-img {
    text-align: center;
    margin-bottom: 0;
  }
  .intro-img img {
    width: 80vw;
    max-width: 220px;
  }
}

/* Intro image row - base */
.intro-image-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  margin: 12px 0 12px 0;
  max-width: 100%;
}

.intro-img-pair {
  display: block;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Variant: side-by-side with equal height */
.intro-image-row.side-by-side {
  align-items: stretch;
}

.intro-image-row.side-by-side .intro-img-pair {
  height: 500px;
  width: auto;
  object-fit: cover;
}

/* Variant: full-width single image (for panoramas) */
.intro-image-row.full-width .intro-img-pair {
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* Variant: centered single image */
.intro-image-row.centered .intro-img-pair {
  max-width: 100%;
  height: auto;
}

@media (max-width: 700px) {
  .intro-image-row {
    flex-direction: column;
    align-items: center;
    gap: 18px;
  }
  .intro-image-row.side-by-side .intro-img-pair {
    height: auto;
    width: 90vw;
    max-width: 98vw;
    object-fit: contain;
  }
}

/* =========================
   Code Card (highlight.js)
   ========================= */
.code-card {
  background: transparent;
  border: none;
  padding: 0;
  margin: 1.5rem 0;
}

.code-card figcaption {
  font-size: 0.85rem;
  font-weight: 600;
  color: #57606a;
  margin: 0 0 0.5rem;
}

.code-card pre {
  background: #f6f8fa;
  border: 1px solid var(--card-line);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.45;
}

[data-theme="dark"] .code-card pre {
  background: #0d1117;
  border-color: #30363d;
}

.code-card pre code {
  background: transparent;
  padding: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
}

pre code.hljs,
code.hljs {
  background: transparent;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #24292e;
  -webkit-font-smoothing: auto;
}

/* Code token colors - Light theme */
.hljs-comment,
.hljs-quote { color: #6a737d; font-style: italic; }

.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-name { color: #d73a49; }

.hljs-string,
.hljs-meta .hljs-string,
.hljs-doctag { color: #032f62; }

.hljs-number,
.hljs-type,
.hljs-attr,
.hljs-template-variable,
.hljs-variable { color: #005cc5; }

.hljs-function .hljs-title,
.hljs-title { color: #6f42c1; }

.hljs-attribute { color: #e36209; }

.hljs-built_in,
.hljs-symbol { color: #e36209; }

.hljs-params { color: #24292e; }

.hljs-addition { background: #e6ffed; color: #22863a; }
.hljs-deletion { background: #ffeef0; color: #b31d28; }

/* Code token colors - Dark theme */
[data-theme="dark"] pre code.hljs { color: #e6edf3; }
[data-theme="dark"] .code-card pre { background: #1f2430; }
[data-theme="dark"] .hljs-comment,
[data-theme="dark"] .hljs-quote { color: #8b949e; }
[data-theme="dark"] .hljs-keyword,
[data-theme="dark"] .hljs-selector-tag { color: #ff7b72; }
[data-theme="dark"] .hljs-string { color: #a5d6ff; }
[data-theme="dark"] .hljs-number,
[data-theme="dark"] .hljs-attr { color: #79c0ff; }
[data-theme="dark"] .hljs-title,
[data-theme="dark"] .hljs-function .hljs-title { color: #d2a8ff; }
[data-theme="dark"] .hljs-built_in { color: #ffa657; }
[data-theme="dark"] .hljs-attribute { color: #ffa657; }
[data-theme="dark"] .hljs-params { color: #e6edf3; }

/* =========================
   Hyperparam Table
   ========================= */
.hyperparam-table-wrapper {
  margin: 20px auto 28px;
  display: flex;
  justify-content: center;
  padding: 0 12px;
}

.hyperparam-table-card {
  width: 100%;
  max-width: 980px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  box-shadow: 0 8px 24px -14px var(--shadow);
  padding: 16px 18px 12px;
}

.hyperparam-table-card .table-title {
  font-weight: 700;
  letter-spacing: 0.2px;
  margin: 0 0 6px;
  text-align: center;
}

.hyperparam-table-card .table-note {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hyperparam-table-scroll {
  overflow-x: auto;
  border-radius: 10px;
}

.hyperparam-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  min-width: 620px;
}

.hyperparam-table thead th {
  background: linear-gradient(135deg, var(--card-soft), var(--card));
  color: var(--heading);
  text-align: left;
  padding: 10px 12px;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid var(--card-line);
  position: sticky;
  top: 0;
}

.hyperparam-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--card-line);
  color: var(--text);
  font-size: 0.96rem;
}

.hyperparam-table tbody tr:last-child td {
  border-bottom: none;
}

.hyperparam-table tbody tr:hover {
  background: var(--card-soft);
}

.hyperparam-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--card-line);
  background: var(--content-bg);
}

.hyperparam-pill small {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.8rem;
}

.hyperparam-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--discussion-bg);
  color: var(--discussion-accent);
  border: 1px solid var(--discussion-border);
}

.hyperparam-table .notes {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

@media (max-width: 820px) {
  .hyperparam-table {
    min-width: 0;
  }
}

@media (max-width: 720px) {
  .hyperparam-table thead {
    display: none;
  }

  .hyperparam-table tbody tr {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 8px 14px;
    padding: 10px 0;
    border-bottom: 1px solid var(--card-line);
  }

  .hyperparam-table tbody td {
    display: flex;
    align-items: baseline;
    gap: 10px;
    border: none;
    padding: 0;
  }

  .hyperparam-table tbody td::before {
    content: attr(data-label);
    min-width: 120px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
  }

  .hyperparam-table-card {
    padding: 14px 14px 10px;
  }
}

/* =========================
   MathJax
   ========================= */
.math-block {
  margin: 10px 0 14px;
}

mjx-container[jax="CHTML"][display="true"] {
  margin: 0.75rem auto;
}

mjx-container[jax="CHTML"] {
  line-height: 1.3;
}

/* =========================
   Print Styles
   ========================= */
@media print {
  html,
  body {
    height: auto;
    overflow: visible;
  }

  body {
    padding-top: 0;
    background: #fff;
    color: #000;
  }

  main.with-sidebar {
    height: auto;
    overflow: visible;
  }

  .top-navbar,
  #sidebar,
  .sidebar,
  #sidebar-overlay,
  .overlay,
  .lightbox {
    display: none;
  }

  .main-center {
    max-width: none;
    width: auto;
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0;
  }

  a,
  a:link,
  a:visited {
    color: #000;
    text-decoration: underline;
  }

  figure,
  pre,
  table {
    break-inside: avoid;
  }

  h1, h2, h3 {
    break-after: avoid;
  }
}