body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background-color: #fff;
  -webkit-user-select:none;
  -moz-user-select:none;
  -ms-user-select:none;
  user-select:none
}

.container {
  max-width: 400px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo-box, .image-upload, .image-display, .image-preview {
  width: 100%;
  height: 150px;
  background-color: #e7f0ff;
  margin-bottom: 1rem;
}

input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.btn {
  width: 100%;
  padding: 0.75rem;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: #0056b3;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  width: 100%;
}

.card {
  background-color: #f0f0f0;
  padding: 1rem;
  border-radius: 10px;
  text-align: center;
}

.tabs button {
  margin: 0 0.5rem;
}

.event-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.leaderboard {
  width: 100%;
  margin-bottom: 2rem;
}

.rank-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.bar {
  background-color: #e0e0e0;
  width: 100%;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
}

.bar div {
  height: 100%;
  background-color: #4da8ff;
}

.post-list {
  width: 100%;
}

.post-card {
  display: flex;
  align-items: center;
  background-color: #e7f0ff;
  padding: 1rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.post-card .image-preview {
  width: 60px;
  height: 60px;
  background-color: #cfe0ff;
  margin-right: 1rem;
  border-radius: 8px;
}

.post-card .info p {
  margin: 0.2rem 0;
}