* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  position: relative;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  overflow-y: auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("../img/kampus.jpg") no-repeat center center fixed;
  background-size: cover;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(6px);
  z-index: -1;
}

.overlay {
  width: 100%;
  max-width: 420px;
  border-radius: 20px;
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 0 25px rgba(0,0,0,.3);
  overflow: hidden;
  animation: fade .8s ease;
}

.form-header {
  padding: 20px;
  text-align: center;
}

.form-header h2 {
  color: #FFD700;
}

.form-body {
  padding: 25px;
}

label {
  display: block;
  margin-top: 12px;
  font-weight: bold;
}

input {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.08);
  color: #fff;
}

.button-group {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: rgba(255,215,0,.25);
  color: #FFD700;
}

.notif {
  background: rgba(255,0,0,.15);
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 10px;
}

@keyframes fade {
  from {opacity:0; transform:translateY(20px);}
  to {opacity:1;}
}