/* CSS Variables for theming */
:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  color-scheme: light dark;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Light theme (default) */
:root,
[data-theme='light'] {
  /* Background */
  --background-color: #ECDFD2;
  --surface-color: #FFFFFF;

  /* Text */
  --text-color: #1F2937;
  --heading-color: #111827;

  /* Primary brand color */
  --primary-color: #213885;
  --link-color: #213885;

  /* Borders / subtle lines */
  --border-color: #D8D2CA;
  --border-subtle: #C9C3BC;

  /* Code blocks */
  --code-background: #F3EEE8;

  /* Button colors */
  --danger-color: #d32f2f;
  --danger-hover: #ffebee;
  --border-radius: 8px;
  --transition-speed: 0.2s;
}

/* Dark mode */
[data-theme='dark'] {
  --background-color: #262B40;
  --surface-color: #2F364B;
  --text-color: #ECECEC;
  --heading-color: #F2F2F2;
  --primary-color: #A8C4EC;
  --link-color: #A8C4EC;
  --border-color: #3A4158;
  --border-subtle: #49526B;
  --code-background: #1D2230;
  --danger-color: #f44336;
  --danger-hover: #1a1a1a;
}

[data-theme='dark'] button {
  background-color: #5379AE;
}

[data-theme='dark'] .nova-textarea::placeholder {
  color: #9CA3AF;
}

/* Apply theme colors to html and body */
html {
  background-color: var(--background-color);
  color: var(--text-color);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 20px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading-color);
  font-weight: 700;
  letter-spacing: -0.01em;
}

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

a {
  font-weight: 500;
  color: var(--link-color);
  text-decoration: inherit;
}
a:hover {
  color: var(--link-color);
  text-decoration: underline;
}

/* General button styles */
button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: var(--primary-color);
  color: #FFFFFF;
  cursor: pointer;
  transition: all 0.25s;
}

button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

[data-theme='light'] button {
  background-color: #213885;
}

[data-theme='light'] button:hover {
  background-color: #1a2d6b;
}

button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

/* Fallback for system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --background-color: #262B40;
    --surface-color: #2F364B;
    --text-color: #ECECEC;
    --heading-color: #FFFFFF;
    --primary-color: #A8C4EC;
    --link-color: #A8C4EC;
    --border-color: #3A4158;
    --border-subtle: #49526B;
    --code-background: #1D2230;
  }
  
  :root:not([data-theme]) button {
    background-color: #5379AE;
  }
}

/* React App specific styles */
#root {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

.logo {
  height: 6em;
  padding: 1.5em;
  will-change: filter;
  transition: filter 300ms;
}
.logo:hover {
  filter: drop-shadow(0 0 2em #646cffaa);
}
.logo.react:hover {
  filter: drop-shadow(0 0 2em #61dafbaa);
}

@keyframes logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: no-preference) {
  a:nth-of-type(2) .logo {
    animation: logo-spin infinite 20s linear;
  }
}

.card {
  padding: 2em;
  background-color: var(--surface-color);
  border-radius: 10px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--border-color);
}

[data-theme='dark'] .card {
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
}

.read-the-docs {
  color: var(--text-color);
  opacity: 0.7;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 18px;
  transition: all 0.3s ease;
  z-index: 1000;
  color: var(--text-color);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}