.hero {
  position: relative;
  color: #fff;
  padding: 48px 20px 38px;
  text-align: center;
  background: url("../assets/images/banner.png") center/cover no-repeat;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(13, 43, 69, 0.85);
}

.hero > * {
  position: relative;
  z-index: 2;
}

.hero-logo {
  height: 64px;
  margin-bottom: 8px;
}

.hero-title {
  margin: 2px 0 0;
  font-size: 2.8rem;
  font-weight: 700;
  font-family: "Sora", sans-serif;
  letter-spacing: 0.05em;
}

.hero-subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-top: 8px;
}

.buttons {
  margin-top: 12px;
}

.buttons a {
  display: inline-block;
  margin: 4px;
  padding: 12px 22px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  border: 2px solid #fff;
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
}

.abstract {
  background: var(--light);
  padding: 25px;
  border-radius: 8px;
}

.abstract-preprint-wrap {
  margin: 22px 0 0;
  text-align: center;
}

.abstract-preprint {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s ease;
  background: var(--accent);
  color: #fff;
}

.preprint-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.abstract-preprint:hover {
  opacity: 0.9;
}

.architecture-block {
  text-align: center;
  margin: 30px 0;
}

.architecture-image {
  width: 100%;
  border: 0 solid #ddd;
  border-radius: 8px;
}

.architecture-caption {
  font-size: 0.9rem;
  color: #555;
  margin-top: 10px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 25px;
}

.feature-box {
  background: var(--light);
  padding: 20px;
  border-radius: 8px;
}

.demo-video-section {
  text-align: left;
}

.demo-video {
  position: relative;
  display: block;
  width: 100%;
  max-width: 960px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
  background: #000;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
}

.demo-video-embed {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.site-footer {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 30px 20px;
  font-size: 0.9rem;
}

.site-footer a {
  color: #fff;
}

.footer-layout {
  max-width: 1300px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.footer-text {
  text-align: center;
}

.footer-logos {
  justify-self: end;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-logo {
  height: 88px;
  width: auto;
  max-width: min(320px, 80vw);
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  padding: 8px 12px;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .buttons a {
    width: min(280px, 100%);
  }

  .features {
    grid-template-columns: 1fr;
  }

  .footer-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-spacer {
    display: none;
  }

  .footer-logos {
    justify-self: center;
  }

  .footer-logo {
    height: 64px;
  }

}