* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #16141f;
  color: #f0f0f5;
  font-family: 'Segoe UI', sans-serif;
}

.box {
  width: 320px;
  max-width: calc(100vw - 40px);
  background: #1f1c2e;
  border: 1px solid #322e46;
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
}

h1 {
  font-size: 20px;
  margin: 0 0 4px;
}

.sub {
  color: #9d99b5;
  font-size: 14px;
  margin: 0 0 20px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input[type='password'] {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #423d5c;
  background: #0f0d18;
  color: #fff;
  font-size: 15px;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  background: #5d4fef;
  color: white;
}

button:hover {
  background: #6f61ff;
}

.error {
  color: #ff6b81;
  font-size: 13px;
  margin-top: 14px;
}