:root {
  color-scheme: dark;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: #0b0d16;
  background-image:
    radial-gradient(circle at 12% 12%, rgba(114, 209, 209, 0.14), transparent 52%),
    radial-gradient(circle at 88% 8%, rgba(244, 184, 96, 0.16), transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(24, 27, 42, 0.6), transparent 55%);
  background-attachment: fixed;
  text-rendering: optimizeLegibility;
}

.site-header {
  background-color: transparent;
  backdrop-filter: none;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.is-scrolled {
  background-color: #0b0d16;
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

::selection {
  background: rgba(244, 184, 96, 0.45);
  color: #0b0d16;
}

.card-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.card-reveal.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

.accordion-panel {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.35s ease;
}

.accordion-panel.is-open {
  opacity: 1;
}

@media (max-width: 768px) {
  body {
    background-attachment: scroll;
  }
}