body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f7f8fb 0%, #eef1f7 100%);
  color: #122033;
}

.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px 40px;
}

h1 {
  margin: 8px 0 16px;
}

.upload-box {
  display: flex;
  gap: 10px;
  align-items: center;
  background: #fff;
  border: 1px solid #d9deea;
  border-radius: 12px;
  padding: 14px;
}

button {
  background: #0b5ed7;
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 9px 14px;
  font-weight: 600;
  cursor: pointer;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #d9deea;
  border-radius: 10px;
  overflow: hidden;
}

th,
td {
  border-bottom: 1px solid #e9edf4;
  padding: 10px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  background: #f2f5fb;
}

.error {
  color: #b42318;
  font-weight: 600;
}

@media (max-width: 760px) {
  th,
  td {
    font-size: 12px;
    padding: 8px;
  }

  .upload-box {
    flex-direction: column;
    align-items: stretch;
  }
}