/* Base resets */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, 'Helvetica Neue', Arial, 'Noto Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  color: #e6e6e6;
  background: #0a0a0b;
  overflow: hidden;
}

/* Animated background grid with moving light lines */
.background {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(0, 170, 255, 0.15), rgba(0, 0, 0, 0)),
              radial-gradient(800px 400px at 10% 110%, rgba(255, 0, 170, 0.12), rgba(0, 0, 0, 0)),
              #050507;
}

/* Grid */
.background::before {
  content: "";
  position: absolute;
  inset: -200% -200%; /* large to allow rotation without edges showing */
  background-image: linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 60px 60px, 60px 60px;
  transform: rotate(12deg);
  animation: subtle-pan 60s linear infinite;
}

@keyframes subtle-pan {
  0% { transform: rotate(12deg) translate3d(0, 0, 0); }
  100% { transform: rotate(12deg) translate3d(-200px, -200px, 0); }
}

/* Moving light lines */
.background::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    /* diagonal sweeping beams */
    repeating-linear-gradient(120deg,
      rgba(255,255,255,0) 0px,
      rgba(255,255,255,0) 120px,
      rgba(0, 180, 255, 0.18) 160px,
      rgba(255,255,255,0) 220px
    ),
    repeating-linear-gradient(300deg,
      rgba(255,255,255,0) 0px,
      rgba(255,255,255,0) 140px,
      rgba(255, 0, 170, 0.14) 180px,
      rgba(255,255,255,0) 240px
    );
  filter: blur(0.3px) saturate(130%);
  mix-blend-mode: screen;
  animation: beams-move 18s linear infinite;
}

@keyframes beams-move {
  0% { background-position: 0 0, 0 0; }
  100% { background-position: 1200px 800px, -1600px -1000px; }
}

/* Mouse-reactive light blobs (Huly-style) */
.light {
  position: absolute;
  width: 65vmax;
  height: 65vmax;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.24;
  pointer-events: none;
  transform: translate3d(-50%, -50%, 0);
  transition: opacity 300ms ease;
}

.light--primary {
  background: radial-gradient(closest-side, rgba(0, 190, 255, 0.9), rgba(0, 190, 255, 0) 70%);
  mix-blend-mode: screen;
}

.light--accent {
  background: radial-gradient(closest-side, rgba(255, 0, 180, 0.7), rgba(255, 0, 180, 0) 70%);
  mix-blend-mode: screen;
}

@media (prefers-reduced-motion: reduce) {
  .light { display: none; }
}

/* Content */
.content {
  position: relative;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}

.content h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: -0.02em;
}

.content p {
  margin: 0;
  opacity: 0.85;
}

.actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* Huly-like Buttons */
.btn {
  --ring: 0 190 255;
  --bg: 12, 14, 18;
  --fg: 230, 235, 240;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  color: rgb(var(--fg));
  background: rgba(var(--bg), 0.6);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.2px;
  backdrop-filter: blur(6px);
  transition: transform 120ms ease, border-color 200ms ease, background 200ms ease, box-shadow 200ms ease;
}

.btn::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: radial-gradient(120px 60px at var(--mx,50%) var(--my,50%), rgba(var(--ring), 0.6), rgba(255,255,255,0) 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,0.18); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(180deg, rgba(0, 190, 255, 0.22), rgba(0, 0, 0, 0))
              ,rgba(var(--bg), 0.6);
  box-shadow: 0 10px 30px -10px rgba(0, 190, 255, 0.35), inset 0 0 0 1px rgba(255,255,255,0.06);
}

.btn--ghost { background: rgba(20,22,26,0.4); }