:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  background: linear-gradient(135deg, #1e1e2e 0%, #2d2d44 100%);
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

/* Mobile-specific fixes */
@media (max-width: 768px) {
  body {
    min-width: auto;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
  }

  h1 {
    font-size: 2.5em;
  }
}

/* Fix for iOS Safari */
@supports (-webkit-touch-callout: none) {
  body {
    min-height: -webkit-fill-available;
  }
}

/* Fix for mobile browsers when opened from external apps */
@media (max-width: 480px) {
  body {
    position: relative;
    overflow-x: hidden;
  }

  #root {
    width: 100%;
    min-height: 100vh;
  }
}
