body {
  font-family: Arial, Helvetica, sans-serif;
  background: #e6ecf0;
  margin: 0;
  padding: 0;
}

header {
  background: #00bfff;
  color: white;
  padding: 20px 15px;
  font-size: 40px;
  text-align: center;
  font-family: 'Danfo', Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
}

#container {
  max-width: 600px;
  margin: auto;
  background: white;
  min-height: 100vh;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

form {
  border-bottom: 1px solid #ccc;
  padding: 10px;
}

textarea {
  width: 100%;
  height: 60px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 5px;
  font-size: 14px;
  margin-bottom: 8px;
  box-sizing: border-box;
}

input[type="file"] {
  margin-bottom: 10px;
}

button {
  background: #00bfff;
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 20px;
  font-size: 14px;
  cursor: pointer;
}

.post {
  border-bottom: 1px solid #eee;
  padding: 10px;
  display: flex;
}

img {
  pointer-events: none;  
  user-select: none;    
}

.post img.avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  margin-right: 10px;
}

.post-content img {
  max-width: 100%;
  border-radius: 8px;
  margin-top: 5px;
  display: block;
}

.post-content {
  flex: 1;
}

.post-content p {
  margin: 0;
  font-size: 15px;
}

.post-content small {
  color: gray;
  font-size: 12px;
  display: inline-block;
  margin-right: 10px;
}

.deleteBtn {
  color: red;
  cursor: pointer;
  font-size: 12px;
  margin-left: 10px;
}

#auth {
  padding: 10px;
  border-bottom: 1px solid #ccc;
}

#auth input {
  margin-bottom: 8px;
  padding: 6px;
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
}

#auth button {
  margin-top: 8px;
  width: 100%;
}

:root{
  --avatar-size: 40px;  /* .post img.avatar の幅/高さと合わせる */
  --avatar-gap: 10px;   /* アイコンと本文の間隔ぶん */
}

/* PCだけアイコンぶんの余白を右側に確保 */
@media (min-width: 768px) {
  .post{
    padding-right: calc(var(--avatar-size) + var(--avatar-gap));
  }
}