@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800&display=swap');

body {
  font-family: 'Manrope', sans-serif;
}

h1, h2, h3, h4, h5, h6,
.navbar-brand, .nav-link,
.sidebar-title {
  font-family: 'Manrope', sans-serif;
}

.desmos-container {
  width: 100%;
  height: 500px;
  margin: 1.5em 0;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  margin: 1.5em 0;
  border-radius: 8px;
}

.video-container iframe,
.video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.key-formula {
  background: #f8f9fa;
  border-left: 4px solid #0d6efd;
  padding: 1em 1.5em;
  margin: 1em 0;
  border-radius: 0 8px 8px 0;
}