* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f2f4f8;
  color: #17212b;
}

.container {
  max-width: 880px;
  margin: 32px auto;
  padding: 0 16px;
}

h1 {
  margin: 0 0 12px;
}

.hint {
  margin: 0 0 20px;
  color: #4b5b6c;
}

.card {
  background: #fff;
  border: 1px solid #d9e1ea;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}

h2 {
  margin-top: 0;
  font-size: 18px;
}

label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
}

input[type="text"],
input[type="file"] {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid #bcc8d6;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
}

.row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  background: #0f62fe;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}

button:hover {
  background: #0353e9;
}

pre {
  margin: 12px 0 0;
  padding: 12px;
  border-radius: 8px;
  background: #0b1020;
  color: #d7ebff;
  overflow-x: auto;
  min-height: 42px;
}

@media (max-width: 680px) {
  .row {
    grid-template-columns: 1fr;
  }
}