body {
  font-family: system-ui, sans-serif;
  background: #f5f5f5;
  padding: 20px;
}

.input-box {
  max-width: 600px;
  margin: 0 auto 20px auto;
  background: #fff;
  padding: 16px;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.input-box label {
  font-weight: 600;
  display: block;
  margin-top: 10px;
}

.input-box input,
.input-box select {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 1rem;
}

.input-box button {
  margin-top: 12px;
  padding: 10px 16px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}

#feed {
  max-width: 600px;
  margin: 20px auto;
}

.feed-item {
  background: #fff;
  padding: 12px;
  margin-bottom: 8px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}