body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: #f4f7fb;
  margin: 0;
  padding: 28px;
}

.app {
  width: 900px;
  max-width: 96%;
  margin: 0 auto;
}

h1 {
  text-align: center;
  margin-bottom: 18px;
}

.drop-zone {
  border: 2px dashed #2b7be4;
  background: #ffffff;
  padding: 22px;
  border-radius: 8px;
  text-align: center;
  color: #234a86;
  cursor: pointer;
  margin-bottom: 12px;
}

textarea {
  width: 100%;
  height: 220px;
  padding: 12px;
  font-size: 14px;
  border-radius: 8px;
  border: 1px solid #d0d7e6;
  box-sizing: border-box;
  resize: vertical;
  background: white;
}

.controls {
  display: flex;
  gap: 10px;
  margin: 10px 0 16px 0;
  flex-wrap: wrap;
}

button {
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: #2b7be4;
  color: white;
  font-weight: 600;
}

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

label {
  display: block;
  margin: 10px 0 6px;
  font-weight: 600;
}