:root {
  /* Default: Dark Mode Variables */
  --bg-color: oklch(0.15 0.02 260);
  --bg-gradient: radial-gradient(at 0% 0%, oklch(0.3 0.1 330 / 0.2) 0px, transparent 50%),
                 radial-gradient(at 100% 100%, oklch(0.3 0.1 260 / 0.2) 0px, transparent 50%);
  --text-primary: oklch(0.98 0.01 260);
  --text-secondary: oklch(0.8 0.02 260);
  --accent-color: oklch(0.7 0.25 330);
  --accent-glow: oklch(0.7 0.25 330 / 0.4);
  
  --card-bg: oklch(0.2 0.03 260 / 0.6);
  --card-border: oklch(0.98 0.01 260 / 0.1);
  
  --ball-white: oklch(0.98 0.01 260);
  --ball-gold: oklch(0.85 0.15 80);
  
  /* Layout */
  --container-width: 800px;
  --radius-lg: 24px;
  --radius-md: 12px;
}

[data-theme="light"] {
  --bg-color: oklch(0.98 0.01 260);
  --bg-gradient: radial-gradient(at 0% 0%, oklch(0.9 0.05 330 / 0.3) 0px, transparent 50%),
                 radial-gradient(at 100% 100%, oklch(0.9 0.05 260 / 0.3) 0px, transparent 50%);
  --text-primary: oklch(0.15 0.02 260);
  --text-secondary: oklch(0.4 0.02 260);
  --accent-color: oklch(0.6 0.25 330);
  --accent-glow: oklch(0.6 0.25 330 / 0.2);
  
  --card-bg: oklch(1 0 0 / 0.7);
  --card-border: oklch(0 0 0 / 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: var(--bg-gradient);
}

.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

header {
  padding: 3rem 0 2rem;
  text-align: center;
  position: relative;
}

.theme-toggle-container {
  position: absolute;
  top: 2rem;
  right: 1rem;
}

#theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

header h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

header h1 span {
  color: var(--accent-color);
  text-shadow: 0 0 20px var(--accent-glow);
}

header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

main {
  flex: 1;
  padding-bottom: 4rem;
}

footer {
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--card-border);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

lotto-generator {
  display: block;
  container-type: inline-size;
}

@media (max-width: 600px) {
  header h1 {
    font-size: 2.5rem;
  }
  .theme-toggle-container {
    position: static;
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
  }
}