* {
  box-sizing: border-box;
}
body {
  background: #0e0e0e;
  color: #fff;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}
.login-box {
  background: #1b1b1b;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px #444;
  width: 320px;
  max-width: 90%;
  text-align: center;
}
h1 {
  margin: 0;
  font-size: 28px;
}
h2 {
  margin: 10px 0 20px;
  font-size: 16px;
  font-weight: normal;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #aaa;
}
input,
button {
  display: block;
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  border: none;
  border-radius: 5px;
  font-size: 14px;
}
input {
  background: #2a2a2a;
  color: #fff;
}
button {
  background: #3b82f6;
  color: white;
  cursor: pointer;
}
.error {
  margin-top: 15px;
  color: #f87171;
  display: none;
}
.meta {
  margin-top: 10px;
  font-size: 13px;
  color: #888;
}