* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", Arial, sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;

  background:
    linear-gradient(rgba(13, 13, 13, 0.8), rgba(13, 13, 13, 0.85)),
    url("img/banner.jpg");

  background-size: cover;
  background-position: center;
}

.form-dangnhap {
  width: 380px;
  background: #121212;
  padding: 40px 35px;
  border-radius: 8px;
  border: 1px solid #222;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
}

.form-dangnhap h2 {
  text-align: center;
  margin-bottom: 30px;
  color: #ffffff;
  font-size: 26px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.form-dangnhap input {
  width: 100%;
  padding: 14px 15px;
  margin: 12px 0;
  border: 1px solid #252525;
  background: #1a1a1a;
  color: #fff;
  border-radius: 4px;
  outline: none;
  font-size: 14px;
  transition: 0.3s ease;
}

.form-dangnhap input:focus {
  border-color: #d4af37;
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.2);
}

.form-dangnhap button {
  width: 100%;
  padding: 14px;
  margin-top: 20px;
  border: none;
  border-radius: 4px;
  background: #d4af37;
  color: #000;
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  transition: 0.3s ease;
}

.form-dangnhap button:hover {
  background: #ffffff;
  color: #000000;
  transform: translateY(-2px);
}

.form-dangnhap p {
  text-align: center;
  margin-top: 25px;
  color: #888;
  font-size: 14px;
}

.form-dangnhap a {
  color: #d4af37;
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s;
}

.form-dangnhap a:hover {
  color: #fff;
  text-decoration: underline;
}