html, body {
  margin: 0;
  padding: 0;
  background: #fdfcf9;
  color: #1a1a1a;
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.65;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 50px 24px 60px;
}
.wrap.wide {
  max-width: 1080px;
}

/* Nav */
nav.tabs {
  margin-bottom: 44px;
  border-bottom: 1px solid #e2e0d8;
  padding-bottom: 16px;
}
nav.tabs ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}
nav.tabs a {
  color: #1a1a1a;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
nav.tabs a:hover,
nav.tabs a.active {
  border-bottom-color: #1a1a1a;
}

h1 {
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 6px 0;
}
h1.small-title {
  font-size: 1.6rem;
}
p.tagline {
  font-size: 1rem;
  color: #555;
  font-style: italic;
  margin: 0 0 34px 0;
}

p, li {
  font-size: 1.02rem;
}

h2 {
  font-size: 1.2rem;
  font-weight: 400;
  margin: 40px 0 14px 0;
  border-bottom: 1px solid #ddd;
  padding-bottom: 6px;
}

a {
  color: #6b5a3f;
}

.credit {
  color: #888;
  font-size: 0.85rem;
}

/* Video grid - damier / checkerboard layout */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 34px 24px;
  margin-top: 30px;
}
@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .video-grid { grid-template-columns: 1fr; }
}
.video-item {
  padding-bottom: 6px;
}
.video-item .video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #111;
  margin-bottom: 12px;
}
.video-item .video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}
.video-item h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 0 0 4px 0;
}
.video-item .duration {
  font-size: 0.8rem;
  color: #999;
  margin-bottom: 6px;
}
.video-item p {
  margin: 0;
  color: #333;
  font-size: 0.92rem;
}

/* Single-column variant, used for the Doc page (fewer, longer videos) */
.video-grid.single-col {
  grid-template-columns: 1fr;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.video-grid.single-col .video-item {
  border-bottom: 1px solid #eee;
  padding-bottom: 30px;
}
.video-grid.single-col h3 { font-size: 1.1rem; }
.video-grid.single-col p { font-size: 1.02rem; }

/* Blog list */
.post-list {
  list-style: none;
  padding: 0;
  margin: 30px 0 0 0;
}
.post-list li {
  border-bottom: 1px solid #eee;
  padding: 16px 0;
}
.post-list a.post-title {
  font-size: 1.08rem;
  text-decoration: none;
  color: #1a1a1a;
}
.post-list a.post-title:hover {
  text-decoration: underline;
}
.post-list .post-meta {
  font-size: 0.82rem;
  color: #999;
  margin-top: 3px;
}
.post-list .todo-tag {
  font-size: 0.75rem;
  color: #b08a4e;
  border: 1px solid #e6d7b8;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 8px;
}

/* Post categories */
.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 20px 0 10px 0;
  font-size: 0.85rem;
}
.categories a {
  color: #6b5a3f;
  text-decoration: none;
  border-bottom: 1px dotted #b8a97e;
}

/* Photo tab */
.photo-list {
  list-style: none;
  padding: 0;
  margin: 30px 0 0 0;
}
.photo-list li {
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}
.photo-list a {
  text-decoration: none;
  font-size: 1.05rem;
  color: #1a1a1a;
}
.photo-list a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid #eee;
  font-size: 0.8rem;
  color: #999;
}
footer a {
  color: #888;
}