body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, #202833, #080b0f 60%);
  color: #e8edf2;
  font-family: Arial, sans-serif;
}
.panel {
  width: 420px;
  max-width: calc(100% - 40px);
  padding: 38px;
  background: rgba(12, 16, 21, 0.96);
  border: 1px solid #343c45;
  border-top: 3px solid #d33;
  box-shadow: 0 20px 70px rgba(0,0,0,.65);
}
h1 {
  margin: 0;
  font-size: 46px;
  letter-spacing: 5px;
}
h2 {
  margin-top: 5px;
  color: #e34b4b;
  font-size: 16px;
  letter-spacing: 3px;
}
label {
  font-size: 13px;
  color: #aeb8c2;
}
input {
  box-sizing: border-box;
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  color: white;
  background: #090c10;
  border: 1px solid #3a424b;
  outline: none;
}
input:focus {
  border-color: #e34b4b;
}
button {
  width: 100%;
  padding: 14px;
  border: 0;
  background: #c92f2f;
  color: white;
  font-weight: bold;
  letter-spacing: 2px;
  cursor: pointer;
}
button:hover {
  background: #e13b3b;
}
.error {
  padding: 10px;
  margin-bottom: 15px;
  background: #451919;
}
.success {
  padding: 10px;
  margin-bottom: 15px;
  background: #173d29;
}
.note {
  margin-top: 25px;
  color: #77818b;
  font-size: 12px;
}