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

:root {
  --bg-primary: #0f0f1e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --accent-primary: #00d4ff;
  --accent-secondary: #ff006e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #2a2a3e;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
}

html {
  background: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
}

[data-theme="dark"] {
  --bg-primary: #0f0f1e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --accent-primary: #00d4ff;
  --accent-secondary: #ff006e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #2a2a3e;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f0f0;
  --accent-primary: #6366f1;
  --accent-secondary: #ec4899;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border-color: #e5e7eb;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.2);
}

body {
  font-family: 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans',
    'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  letter-spacing: -0.3px;
}

button {
  cursor: pointer;
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  background-color: #007bff;
  color: white;
  transition: background-color 0.2s;
}

button:hover:not(:disabled) {
  background-color: #0056b3;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

a {
  color: #007bff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}
