* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  background: #f5f6f8;
  color: #222;
}

.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: #fff;
  border-radius: 10px;
  border: 1px solid #e6e6e6;
  padding: 16px;
  margin-bottom: 16px;
}

h1, h2, h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  border-bottom: 1px solid #eee;
  padding: 8px 6px;
  vertical-align: top;
}

input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  background: #0a6;
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.95);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.message-meta {
  color: #666;
  font-size: 12px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

@media (max-width: 840px) {
  .grid {
    grid-template-columns: 1fr;
  }
}