:root {
  /* Night Mode Colors (Default) */
  --bg-color: #0a0a0a;
  --surface-color: #1a1a1a;
  --text-color: #f5f5f5;
  --accent-gold: #d4af37;
  --gold-glow: rgba(212, 175, 55, 0.4);
  --shadow-color: rgba(0, 0, 0, 0.5);
  --transition-speed: 0.3s;
}

body.theme-day {
  /* Day Mode Colors */
  --bg-color: #fcfcfc;
  --surface-color: #f0f0f0;
  --text-color: #1a1a1a;
  --accent-gold: #b8860b;
  --gold-glow: rgba(184, 134, 11, 0.2);
  --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Quicksand', sans-serif;
  font-weight: 300;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  position: relative;
  overflow: hidden;
}

/* Subtle texture effect */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3%3Cfilter id='noiseFilter'%3%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3%3C/filter%3%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3%3C/svg%3");
  opacity: 0.03;
  pointer-events: none;
}

.container {
  text-align: center;
  z-index: 1;
  padding: 2rem;
  max-width: 600px;
  width: 100%;
}

h1 {
  font-family: 'Quicksand', sans-serif;
  font-weight: 300;
  font-size: 3rem;
  margin-bottom: 2.5rem;
  color: var(--accent-gold);
  text-shadow: 0 2px 4px var(--shadow-color);
  letter-spacing: 2px;
}

#toto-numbers {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  min-height: 80px;
}

.number-ball {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--surface-color);
  border: 2px solid var(--accent-gold);
  color: var(--accent-gold);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 500;
  box-shadow: 0 4px 15px var(--shadow-color), inset 0 0 10px var(--gold-glow);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
  animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) backwards;
}

@keyframes popIn {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.number-ball:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 8px 25px var(--gold-glow);
}

#generate-button {
  background: transparent;
  border: 2px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-family: 'Quicksand', sans-serif;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

#generate-button:hover {
  background-color: var(--accent-gold);
  color: var(--bg-color);
  box-shadow: 0 0 20px var(--gold-glow);
  transform: translateY(-2px);
}

#generate-button:active {
  transform: translateY(0);
}

#theme-toggle {
  position: absolute;
  top: 2rem;
  right: 2rem;
  background: var(--surface-color);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 0.5rem;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px var(--shadow-color);
  z-index: 10;
}

#theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
  box-shadow: 0 4px 15px var(--gold-glow);
}

.icon-sun { display: none; }
.icon-moon { display: block; }

body.theme-day .icon-sun { display: block; }
body.theme-day .icon-moon { display: none; }

/* Responsive adjustments */
@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  .number-ball { width: 50px; height: 50px; font-size: 1.2rem; }
}