body {
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: #f0f2f5;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 600px;
  margin: 30px;
  padding: 20px;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  box-sizing: border-box;
}

h1, h2 {
  text-align: center;
  color: #333;
}

input, textarea {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
  box-sizing: border-box;
  font-size: 14px;
  resize: none;
}

textarea { height: 80px; }

button {
  padding: 10px 20px;
  margin: 5px 2px;
  border: none;
  border-radius: 8px;
  background-color: #3b82f6;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  transition: 0.2s;
}

button:hover { background-color: #2563eb; }

ul { list-style-type: none; padding: 0; margin: 10px 0; }

li {
  background-color: #f9fafb;
  margin: 6px 0;
  padding: 10px;
  border-radius: 8px;
  word-wrap: break-word;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.time { color: #999; font-size: 12px; margin-left: 10px; }

li button {
  background-color: #ef4444;
  padding: 4px 8px;
  font-size: 12px;
}

li button:hover { background-color: #b91c1c; }

#pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 12px;
}

#pagination button { margin: 0 5px; }

@media screen and (max-width: 640px) {
  .container { margin: 15px; padding: 15px; }
  button { width: 100%; margin: 5px 0; }
}