/* ===== premium-bg.css - ЯРКИЕ ЗВЕЗДЫ ===== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  background-color: #0a1024;

  /* 🌌 ОСНОВНОЙ ГРАДИЕНТ — ярче */
  background-image:
    radial-gradient(circle at 30% 40%, rgba(120, 105, 255, 0.55) 0%, transparent 38%),
    radial-gradient(circle at 80% 60%, rgba(0, 212, 255, 0.40) 0%, transparent 42%),
    radial-gradient(circle at 40% 80%, rgba(40, 60, 120, 0.50) 0%, transparent 52%),
    radial-gradient(circle at 20% 25%, rgba(140, 100, 255, 0.30) 0%, transparent 38%),
    radial-gradient(circle at 90% 70%, rgba(0, 190, 255, 0.28) 0%, transparent 48%),
    linear-gradient(145deg, #1a2748 0%, #101a36 50%, #0a1024 100%);

  background-blend-mode: screen, normal, normal;
  position: relative;
}

/* ===== ✨ ЯРКИЕ ЗВЁЗДЫ - СЛОЙ 1 ===== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  
  /* ЯРКИЕ звезды разного размера с увеличенной плотностью */
  background-image: 
    /* Крупные яркие звезды */
    radial-gradient(3px 3px at 12% 8%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(4px 4px at 28% 18%, #ffdd88, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 45% 12%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(5px 5px at 63% 22%, #aaddff, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 77% 7%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(4px 4px at 90% 28%, #ffccaa, rgba(0,0,0,0)),
    
    /* Средние звезды */
    radial-gradient(2px 2px at 5% 35%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 18% 48%, #88aaff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 33% 38%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 52% 55%, #ffddaa, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 68% 42%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 83% 58%, #aaccff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 95% 45%, #ffffff, rgba(0,0,0,0)),
    
    /* Мелкие звезды для густоты */
    radial-gradient(1px 1px at 9% 72%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 27% 82%, #bbddff, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 41% 68%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 58% 78%, #ffeedd, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 72% 90%, #88bbff, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 88% 75%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 97% 88%, #ddeeff, rgba(0,0,0,0)),
    
    radial-gradient(2px 2px at 15% 95%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(1px 1px at 38% 92%, #ccddff, rgba(0,0,0,0)),
    radial-gradient(2px 2px at 55% 97%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(3px 3px at 80% 96%, #aaccff, rgba(0,0,0,0));
  
  background-repeat: no-repeat;
  background-size: 400px 400px;
  
  /* ЯРКОСТЬ и СВЕЧЕНИЕ */
  opacity: 0.95;
  filter: drop-shadow(0 0 3px rgba(255, 255, 255, 0.6));
  
  animation: starTwinkle 4s ease-in-out infinite alternate;
}

/* ===== ✨ ЯРКИЕ ЗВЁЗДЫ - СЛОЙ 2 (крупные, с сильным свечением) ===== */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  
  background-image: 
    radial-gradient(5px 5px at 8% 15%, #ffddaa, rgba(0,0,0,0)),
    radial-gradient(6px 6px at 65% 25%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(4px 4px at 40% 60%, #aaddff, rgba(0,0,0,0)),
    radial-gradient(7px 7px at 85% 48%, #ffcc88, rgba(0,0,0,0)),
    radial-gradient(5px 5px at 22% 90%, #ffffff, rgba(0,0,0,0)),
    radial-gradient(6px 6px at 58% 8%, #bbddff, rgba(0,0,0,0)),
    radial-gradient(4px 4px at 92% 30%, #ffeedd, rgba(0,0,0,0));
  
  background-repeat: no-repeat;
  background-size: 600px 600px;
  
  /* Сильное свечение для крупных звезд */
  filter: drop-shadow(0 0 6px rgba(255, 200, 100, 0.8)) blur(1px);
  opacity: 1;
  
  animation: starTwinkleLarge 5s ease-in-out infinite alternate-reverse;
}

/* ===== АНИМАЦИЯ МЕРЦАНИЯ ===== */
@keyframes starTwinkle {
  0% {
    opacity: 0.7;
    filter: drop-shadow(0 0 2px rgba(255, 255, 255, 0.4));
  }
  100% {
    opacity: 1;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.8));
  }
}

@keyframes starTwinkleLarge {
  0% {
    opacity: 0.8;
    filter: drop-shadow(0 0 4px rgba(255, 200, 100, 0.6));
  }
  100% {
    opacity: 1;
    filter: drop-shadow(0 0 10px rgba(255, 200, 100, 1));
  }
}

/* ===== НЕБОЛЬШАЯ ГАРАНТИЯ АДАПТИВНОСТИ ===== */
@media (max-width: 768px) {
  body::before {
    background-size: 250px 250px;
    opacity: 0.9;
  }
  body::after {
    background-size: 400px 400px;
  } 
}
/* плавность — без рывков */
body, body::before, body::after {
  will-change: opacity, background-position;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* демо-контент (стилизация под темную тему) */
.demo-content {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  color: #fff;
  font-family: system-ui, -apple-system, 'Inter', 'Segoe UI', Roboto, sans-serif;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
  backdrop-filter: blur(0); /* оставляем фон чистым, контент сверху */
}

h1 {
  font-size: 2.8rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff, #b0d4ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
}

.sub {
  color: #a0b8d4;
  font-weight: 400;
  letter-spacing: 2px;
  font-size: 0.9rem;
  text-transform: uppercase;
}

.glass-panel {
  margin: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  text-align: inherit;
}

.glass-panel p {
  font-size: 1.1rem;
  font-weight: 400;
  color: #e2ecff;
}