:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --border: #1f2630;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --accent: #58a6ff;
  --radius: 10px;
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "SF Pro Text",
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--bg-elev);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-size: 0.92em;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  margin-bottom: 20px;
  padding: 96px 0 56px;
  text-align: center;
  background:
    radial-gradient(circle at 50% -10%, rgba(88, 166, 255, 0.15), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.hero .tagline {
  font-size: clamp(1.05rem, 1.4vw, 1.3rem);
  margin: 0 auto 12px;
  max-width: 680px;
  color: var(--fg);
}

.hero .meta {
  font-size: 0.95rem;
  color: var(--fg-muted);
  margin: 0 auto;
  max-width: 720px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  background: var(--accent);
  color: #0e1116;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.btn-secondary:hover {
  background: var(--bg-elev);
  border-color: #2a3442;
  transform: translateY(-1px);
  text-decoration: none;
}

.sticky-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(14, 17, 22, 0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  opacity: 0;
  transform: translateY(-52px);
  transition: opacity 0.22s ease, transform 0.28s ease;
  pointer-events: none;
}

.sticky-bar.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

main {
  padding: 64px 0 96px;
}

.showcase {
  margin: 0 0 72px;
}

.showcase h2 {
  font-size: 1.5rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.showcase p {
  color: var(--fg-muted);
  margin: 0 0 20px;
}

figure {
  margin: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition:
    border-color 0.15s ease,
    transform 0.15s ease;
}

figure:hover {
  border-color: #2a3442;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
  cursor: zoom-in;
  transition: opacity 0.15s ease;
}

figure img:hover {
  opacity: 0.92;
}

figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.also-available {
  margin: 0 0 8px;
  padding-top: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.resource-list {
  list-style: disc;
  margin: 12px 0 0;
  padding-left: 22px;
  color: var(--fg);
}

.resource-list li {
  margin: 4px 0;
  font-size: 0.95rem;
}

.resource-list li::marker {
  color: var(--fg-muted);
}

.top-bar {
  position: fixed;
  top: 16px;
  right: 20px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.22s ease;
}

.top-bar.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.top-bar a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--fg);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    border-color 0.15s ease,
    background 0.15s ease;
}

.top-bar a:hover {
  background: #1f2630;
  border-color: #2a3442;
  text-decoration: none;
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 64px;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: rgba(8, 10, 14, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: zoom-out;
  animation: lightbox-fade 0.15s ease;
}

.lightbox[hidden] {
  display: none;
}

@keyframes lightbox-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.16);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
  user-select: none;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.18);
}

.lightbox-prev {
  left: 24px;
}

.lightbox-next {
  right: 24px;
}