.container-jwt-decoder {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: #f4f6f9;
  color: #333;
  /* message box */
}
.container-jwt-decoder .container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px;
}
.container-jwt-decoder .card {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  margin-bottom: 20px;
}
.container-jwt-decoder .card .jwt-decode-title {
  margin-top: 0;
  font-size: 26px;
  text-align: center;
  padding: 12px 0;
}
.container-jwt-decoder .card h2 {
  font-size: 20px;
  margin-top: 30px;
  color: #1b4d91;
}
.container-jwt-decoder .subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 20px;
}
.container-jwt-decoder textarea {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 6px;
  resize: vertical;
  font-family: monospace;
  background: #fdfdfd;
  margin-bottom: 20px;
}
.container-jwt-decoder button {
  background-color: #1b4d91;
  color: white;
  padding: 10px 20px;
  border: none;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.container-jwt-decoder button:hover {
  background-color: #1559c3;
}
.container-jwt-decoder .code-box {
  background: #f0f0f0;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 16px;
  font-size: 14px;
  overflow-x: auto;
  white-space: pre-wrap;
  font-family: Consolas, monospace;
}
.container-jwt-decoder .msg-box {
  margin-top: 15px;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  display: none;
}
.container-jwt-decoder .msg-success {
  background: #d1fae5;
  color: #065f46;
  border-left: 5px solid #10b981;
}
.container-jwt-decoder .msg-error {
  background: #fee2e2;
  color: #991b1b;
  border-left: 5px solid #ef4444;
}
.container-jwt-decoder .sample-note {
  margin: 10px 0 8px;
  font-size: 14px;
}
.container-jwt-decoder code#sampleJWT {
  display: block;
  background: #f5f5f5;
  padding: 10px;
  font-size: 13px;
  font-family: monospace;
  border-radius: 6px;
  margin-bottom: 20px;
  overflow-wrap: anywhere;
}
.container-jwt-decoder button#copySampleBtn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  margin-left: 6px;
  vertical-align: middle;
}
.container-jwt-decoder .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 30px;
}
.container-jwt-decoder .section-header h2 {
  margin: 0;
}
.container-jwt-decoder .section-header button {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  margin-left: 8px;
  color: #1b4d91;
}
.container-jwt-decoder textarea.code-box {
  width: 100%;
  font-family: monospace;
  font-size: 14px;
  padding: 14px;
  background: #f8f8f8;
  border-radius: 6px;
  border: 1px solid #ccc;
  resize: vertical;
}