body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
}
.container {
  padding: 20px;
}
.login-box, .panel {
  max-width: 400px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
}
input, button, select, textarea {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  box-sizing: border-box;
}
.hidden {
  display: none;
}
.tile {
  background: #e0e0e0;
  padding: 15px;
  margin: 10px 0;
  border-radius: 5px;
  position: relative;
}
.arrow {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
}
.section-title {
  font-weight: bold;
  margin-top: 20px;
}