body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 30px;
  background: #fff;
  color: #333;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

h1 {
  font-size: 28px;
  margin-bottom: 25px;
}

form {
  width: 100%;
}

.form-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  align-items: center;
  margin-bottom: 14px;
}

label {
  text-align: right;
  font-weight: 600;
  color: #444;
  margin-right: 10px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 8px 10px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

input:focus {
  border-color: #5cb85c;
  outline: none;
}

.invalid {
  color: #d9534f;
  font-size: 13px;
  margin-left: 170px;
  margin-top: -6px;
  margin-bottom: 10px;
}

.remember-row {
  margin-top: 10px;
}

.remember {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #555;
}

.btn {
  background: #5cb85c;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 6px 20px;
  font-size: 15px;
  max-width: 90px;
  height: 36px;
  line-height: 1.4;
}

.btn:hover {
  background: #4cae4c;
}

.input-error {
  border-color: #d9534f;
  box-shadow: 0 0 2px rgba(217, 83, 79, 0.4);
}