:root {
  --bg: #ffffff;
  --bg2: #f6f6f6;
  --ink: #161616;
  --grey: #6b6b6b;
  --line: #e3e3e3;
  --white: #161616;
  --accent: #3378bd;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; }
.logo-wordmark { height: 30px; width: auto; display: block; }
footer img.footer-wordmark { height: 20px; width: auto; vertical-align: middle; margin-right: 8px; opacity: .85; }
nav.links { display: flex; gap: 32px; }
nav.links a { color: #4a4a4a; font-size: 13px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; transition: color .2s; }
nav.links a:hover, nav.links a.active { color: var(--white); }

.section { padding: 90px 24px; }
.section-alt { background: var(--bg2); }
.container { max-width: 1240px; margin: 0 auto; }
.section-kicker { color: var(--accent); text-transform: uppercase; letter-spacing: 3px; font-size: 11.5px; font-weight: 700; margin-bottom: 14px; }
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 700; margin-bottom: 14px; }
.section-sub { color: var(--grey); max-width: 640px; font-size: 15.5px; margin-bottom: 48px; }

.subhead { display: flex; align-items: baseline; justify-content: space-between; margin: 56px 0 20px; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.subhead:first-of-type { margin-top: 0; }
.subhead h3 { font-size: 13px; letter-spacing: 3px; text-transform: uppercase; color: var(--white); }
.subhead span { color: var(--grey); font-size: 12px; }

.gallery { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-flow: dense; gap: 4px; }
.gallery .g-item { aspect-ratio: 1; overflow: hidden; background: #eeeeee; }
.gallery .g-item.span2 { grid-column: span 2; grid-row: span 2; }
.gallery .g-item.span2.col-a { grid-column: 1 / span 2; }
.gallery .g-item.span2.col-b { grid-column: 2 / span 2; }
.gallery .g-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.gallery .g-item:hover img { transform: scale(1.04); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.card { background: var(--bg2); border: 1px solid var(--line); padding: 32px; }
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card .price { color: var(--accent); font-weight: 700; font-size: 22px; margin: 14px 0; }
.card p { color: var(--grey); font-size: 14.5px; margin-bottom: 10px; }
.card ul { color: var(--grey); font-size: 14.5px; padding-left: 18px; margin-bottom: 18px; }
.card ul li { margin-bottom: 6px; }

.btn { display: inline-block; padding: 13px 26px; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; border: 1px solid var(--ink); transition: background .2s, color .2s; }
.btn-primary { background: var(--ink); color: #ffffff; }
.btn-primary:hover { background: transparent; color: var(--ink); }
.btn-outline { border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); }

.dl-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.dl-card { background: var(--bg2); border: 1px solid var(--line); padding: 28px; }
.dl-card h4 { font-size: 17px; margin-bottom: 8px; }
.dl-card p { color: var(--grey); font-size: 14px; margin-bottom: 16px; }
a.dl { color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .5px; }

.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 12px; }
.contact-item { border: 1px solid var(--line); padding: 24px; text-align: center; }
.contact-item .label { color: var(--grey); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 10px; }
.contact-item .value { font-size: 15px; }

footer { background: #fafafa; color: #6b6b6b; text-align: center; padding: 26px; font-size: 11.5px; border-top: 1px solid var(--line); letter-spacing: 0.3px; }
footer img { height: 14px; width: auto; vertical-align: middle; margin-right: 8px; opacity: .8; }
footer .foot-links { margin-bottom: 10px; }
footer .foot-links a { margin: 0 10px; color: #6b6b6b; }
footer .foot-links a:hover { color: var(--ink); }

/* Blog */
.blog-list { display: flex; flex-direction: column; gap: 0; }
.blog-item { display: grid; grid-template-columns: 220px 1fr; gap: 28px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.blog-item .thumb { aspect-ratio: 4/3; overflow: hidden; background: #eeeeee; }
.blog-item .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.blog-item:hover .thumb img { transform: scale(1.04); }
.blog-item .meta { color: var(--grey); font-size: 11.5px; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.blog-item h3 { font-size: 21px; margin-bottom: 10px; }
.blog-item p { color: var(--grey); font-size: 14.5px; margin-bottom: 10px; }
.blog-item .readmore { color: var(--accent); font-size: 12.5px; font-weight: 700; letter-spacing: .5px; }

article.post { max-width: 760px; margin: 0 auto; padding: 70px 24px; }
article.post .post-kicker { color: var(--accent); text-transform: uppercase; letter-spacing: 3px; font-size: 11.5px; font-weight: 700; margin-bottom: 16px; }
article.post h1 { font-size: clamp(28px, 4.2vw, 42px); font-weight: 700; margin-bottom: 18px; line-height: 1.2; }
article.post .post-meta { color: var(--grey); font-size: 13px; margin-bottom: 36px; }
article.post .post-hero { aspect-ratio: 16/9; overflow: hidden; margin-bottom: 40px; background: #eeeeee; }
article.post .post-hero img { width: 100%; height: 100%; object-fit: cover; }
article.post h2 { font-size: 22px; margin: 40px 0 14px; }
article.post p { color: #3a3a3a; font-size: 16px; margin-bottom: 18px; }
article.post ul, article.post ol { color: #3a3a3a; font-size: 16px; padding-left: 22px; margin-bottom: 18px; }
article.post li { margin-bottom: 8px; }
article.post .cta-box { background: var(--bg2); border: 1px solid var(--line); padding: 28px; margin: 44px 0; text-align: center; }
article.post .cta-box p { margin-bottom: 16px; }
article.post blockquote { border-left: 2px solid var(--accent); padding-left: 20px; color: var(--grey); font-style: italic; margin: 24px 0; }

.portfolio-filters { display: flex; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.filter-btn {
  padding: 9px 22px; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase;
  border: 1px solid var(--line); background: transparent; color: var(--grey);
  cursor: pointer; transition: all .2s;
}
.filter-btn:hover { border-color: var(--ink); color: var(--ink); }
.filter-btn.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.portfolio-category.hidden { display: none; }

.video-embed { position: relative; aspect-ratio: 16/9; margin: 40px 0; background: #000; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.udemy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.udemy-card { background: var(--bg2); border: 1px solid var(--line); padding: 22px; }
.udemy-level { color: var(--accent); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; font-weight: 700; margin-bottom: 8px; }
.udemy-card h4 { font-size: 16px; margin-bottom: 10px; line-height: 1.35; }
.udemy-meta { color: var(--grey); font-size: 12.5px; margin-bottom: 12px; }
.udemy-price { font-weight: 700; font-size: 15px; margin-bottom: 14px; }

/* Lightbox */
.gallery .g-item { cursor: zoom-in; }
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.94);
  z-index: 300; display: none; align-items: center; justify-content: center;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 90vw; max-height: 86vh; object-fit: contain; }
.lightbox .lb-close {
  position: absolute; top: 18px; right: 24px; color: #fff; font-size: 32px;
  line-height: 1; cursor: pointer; background: none; border: none; padding: 6px 10px;
}
.lightbox .lb-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.1); border: none; color: #fff; font-size: 30px;
  width: 48px; height: 48px; cursor: pointer; display: flex; align-items: center;
  justify-content: center; border-radius: 50%; transition: background .2s;
}
.lightbox .lb-nav:hover { background: rgba(255,255,255,.22); }
.lightbox .lb-prev { left: 16px; }
.lightbox .lb-next { right: 16px; }
.lightbox .lb-counter {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  color: #ccc; font-size: 12.5px; letter-spacing: 1px;
}

@media (max-width: 860px) {
  nav.links { display: none; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .gallery .g-item.span2 { grid-column: span 2; grid-row: span 1; aspect-ratio: 2/1; }
  .gallery .g-item.span2.col-a, .gallery .g-item.span2.col-b { grid-column: span 2; }
  .grid-2 { grid-template-columns: 1fr; }
  .dl-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .blog-item { grid-template-columns: 1fr; }
  .udemy-grid { grid-template-columns: 1fr; }
  .lightbox .lb-nav { width: 40px; height: 40px; font-size: 24px; }
  .lightbox .lb-prev { left: 6px; }
  .lightbox .lb-next { right: 6px; }
}