:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --text: #1f2328;
  --text-muted: #59636e;
  --border: #d0d7de;
  --primary: #0969da;
  --primary-hover: #0550ae;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--primary-hover);
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(180deg, #eef5ff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 0 2.5rem;
}

.eyebrow {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

h1 {
  margin: 0.3rem 0 0.8rem;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
}

.lede {
  margin: 0;
  max-width: 55ch;
  font-size: 1.1rem;
}

.cta-row {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.button {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.58rem 0.9rem;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
  background: #fff;
}

.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.button.primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #fff;
}

.section {
  padding: 2.2rem 0;
}

.section.alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

h2 {
  margin-top: 0;
}

pre {
  margin: 0.5rem 0 0.9rem;
  background: #f3f4f6;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
  overflow: auto;
}

.feature-list {
  margin: 0;
  padding-left: 1.2rem;
}

.feature-list li + li {
  margin-top: 0.45rem;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
}

figure a {
  display: block;
}

[data-lightbox] img {
  cursor: zoom-in;
}

figcaption {
  padding: 0.6rem 0.8rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0 1.7rem;
  font-size: 0.95rem;
}

body.lightbox-open {
  overflow: hidden;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  display: grid;
  place-items: center;
  z-index: 999;
  padding: 1rem;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-close {
  position: fixed;
  top: 0.9rem;
  right: 1rem;
  border: 0;
  border-radius: 6px;
  width: 2rem;
  height: 2rem;
  background: rgba(255, 255, 255, 0.92);
  color: #111827;
  cursor: pointer;
  font-size: 1.45rem;
  line-height: 1;
}

.lightbox-figure {
  margin: 0;
  max-width: min(1200px, 94vw);
  max-height: 92vh;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: #111827;
}

#lightbox-image {
  display: block;
  width: auto;
  height: auto;
  max-width: min(1200px, 94vw);
  max-height: calc(92vh - 3rem);
}

#lightbox-caption {
  margin: 0;
  padding: 0.6rem 0.85rem;
  font-size: 0.95rem;
  color: #e5e7eb;
}

@media (max-width: 640px) {
  .hero {
    padding-top: 2.8rem;
  }
}