:root {
  --colour-scheme: light;
  --background-color: #ffffff;
  --text-color: #333333;
  --subtitle-color: #444444;
  --border-color: #eeeeee;
  --button-background-color: #007bff;
  --button-hover-background-color: #0069d9;
  --button-disabled-background-color: #cccccc;
  --star-color: #ffcc00;
  --message-background-color: #f8f9fa;

  font-family: 'Roboto Variable', Roboto, Arial, sans-serif;
}

[data-theme='dark'] {
  --colour-scheme: dark;
  --background-color: #121212;
  --text-color: #ffffff;
  --subtitle-color: #bbbbbb;
  --border-color: #444444;
  --button-background-color: #1e88e5;
  --button-hover-background-color: #1565c0;
  --button-disabled-background-color: #555555;
  --star-color: #ffcc00;
  --message-background-color: #333333;
}

body {
  color-scheme: var(--colour-scheme, light);

  margin: 0;
  padding: 0;
  box-sizing: border-box;

  background-color: var(--background-color);

  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
}

.main-content {
  flex: 1;
  overflow: auto;
}

.navigation-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0.5rem 0;

  background-color: var(--background-color);
  border-top: 1px solid var(--border-color);
}

.navigation-bar__link {
  flex: 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text-color);
  padding: .25rem 0;
  border-radius: .5rem;
}

.navigation-bar__link svg {
  width: 1.75rem;
  height: 1.75rem;
  margin-bottom: 5px;
  fill: none;
  stroke-width: 2;
}

.navigation-bar__link span {
  font-size: 14px;
  line-height: 1;
}

.navigation-bar__link.active {
  color: var(--button-background-color);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.theme-toggle:hover {
  color: var(--button-hover-background-color);
}

.page-container {
  max-width: 100%;
  padding: 0 16px;
  background-color: var(--background-color);
  color: var(--text-color);
}

@media (min-width: 768px) {
  .page-container {
    width: 90%;
    max-width: 768px;
    margin: 0 auto;
  }

  .page-title {
    font-size: 2.2rem;
  }
}

@media (min-width: 1024px) {
  .page-container {
    max-width: 1024px;
  }
}