/* Import shared stylesheets */
@import url('colors.css');
@import url('fonts.css');

body {
  font-family: var(--fs-main-font);
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  background: var(--fs-background-color);
  color: var(--fs-text-color);
  transition: background-color 0.3s, color 0.3s;
}

h1 {
  color: var(--fs-heading-color);
  font-family: var(--fs-heading-font);
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--fs-text-muted-color);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.presentations {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.presentation-card {
  background: var(--fs-surface);
  border: 1px solid var(--fs-border);
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.presentation-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px var(--fs-shadow-color);
}

.presentation-card h2 {
  margin: 0 0 0.5rem 0;
  color: var(--fs-heading-color);
  font-family: var(--fs-heading-font);
  font-size: 1.3rem;
}

.presentation-card .filename {
  color: var(--fs-text-muted-color);
  font-size: 0.9rem;
  font-family: var(--fs-code-font);
}

.theme-toggle {
  position: fixed;
  top: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border: none;
  background: var(--fs-surface);
  border: 1px solid var(--fs-border);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s;
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.theme-toggle img {
  width: 30px;
  height: 30px;
}