* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, sans-serif;
}
body {
  background: #f0f2f5;
  direction: rtl;
}
.container {
  max-width: 600px;
  margin: auto;
  background: #fff;
  min-height: 100vh;
  padding: 10px;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #ddd;
  margin-bottom: 15px;
}
header nav a {
  margin-left: 10px;
  text-decoration: none;
  color: #1a73e8;
}
#new-post textarea {
  width: 100%;
  height: 60px;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 8px;
  resize: vertical;
}
#new-post input[type="file"] {
  margin: 5px 0;
}
button {
  background: #1a73e8;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  margin: 5px 0;
}
.post {
  background: #fff;
  padding: 12px;
  margin: 10px 0;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.post img {
  max-width: 100%;
  border-radius: 8px;
  margin-top: 8px;
}
.login-container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  text-align: center;
}
.login-container input {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
}