@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --text-color: #333;
  --container-bg: rgba(255, 255, 255, 0.8);
  --container-border: rgba(0, 0, 0, 0.1);
  --container-shadow: rgba(0, 0, 0, 0.1);
  --number-bg: #fff;
  --number-color: #333;
  --number-shadow: rgba(0, 0, 0, 0.1);
  --btn-gradient: linear-gradient(135deg, #667eea, #764ba2);
  --btn-shadow: rgba(118, 75, 162, 0.4);
}

body.dark-mode {
  --bg-gradient: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  --text-color: #f0f0f0;
  --container-bg: rgba(0, 0, 0, 0.4);
  --container-border: rgba(255, 255, 255, 0.1);
  --container-shadow: rgba(0, 0, 0, 0.5);
  --number-bg: rgba(255, 255, 255, 0.1);
  --number-color: #fff;
  --number-shadow: rgba(0, 0, 0, 0.3);
  --btn-gradient: linear-gradient(135deg, #ff6b6b, #f06595);
  --btn-shadow: rgba(240, 101, 149, 0.4);
}

body {
  font-family: 'Poppins', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background: var(--bg-gradient);
  color: var(--text-color);
  position: relative;
  overflow: hidden;
  transition: background 0.5s ease, color 0.5s ease;
}

body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.05;
  pointer-events: none;
}

.container {
  text-align: center;
  background: var(--container-bg);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 15px 35px var(--container-shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--container-border);
  transition: all 0.5s ease;
  position: relative;
}

#theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  transition: transform 0.3s ease;
}

#theme-toggle:hover {
  transform: scale(1.2);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 30px;
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.lotto-numbers {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.lotto-number {
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  background: var(--number-bg);
  color: var(--number-color);
  font-size: 1.5rem;
  font-weight: 600;
  box-shadow: 0 8px 15px var(--number-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.5s ease, color 0.5s ease;
}

.lotto-number:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.2);
}

#generator-btn {
  background: var(--btn-gradient);
  color: white;
  border: none;
  padding: 15px 30px;
  font-size: 1.2rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 5px 15px var(--btn-shadow);
  transition: all 0.3s ease;
  outline: none;
}

#generator-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--btn-shadow);
}

#generator-btn:active {
  transform: translateY(1px);
  box-shadow: 0 3px 10px var(--btn-shadow);
}

@media (max-width: 600px) {
  .container {
    padding: 25px;
  }
  h1 {
    font-size: 2rem;
  }
  .lotto-number {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    gap: 10px;
  }
  #generator-btn {
    padding: 12px 25px;
    font-size: 1rem;
  }
  #theme-toggle {
    top: 10px;
    right: 10px;
  }
}