*,*::before,*::after{box-sizing:border-box}

html{
  height:100%;
}

body{
  margin:0;
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
  background:linear-gradient(135deg,#1a2332 0%,#0f172a 50%,#0b1120 100%);
  padding:20px;
}

.login-card{
  background:#fff;
  border-radius:20px;
  box-shadow:0 20px 60px rgba(0,0,0,0.4),0 4px 16px rgba(0,0,0,0.2);
  width:100%;
  max-width:400px;
  overflow:hidden;
  animation:fadeIn 0.5s ease-out;
}

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

.login-header{
  background:linear-gradient(135deg,#0d6efd,#0a58ca);
  padding:32px 24px 24px;
  text-align:center;
  position:relative;
}

.login-header img{
  width:56px;
  height:56px;
  display:block;
  margin:0 auto 12px;
  filter:brightness(0) invert(1);
}

.login-header h1{
  margin:0;
  color:#fff;
  font-size:20px;
  font-weight:700;
  letter-spacing:-0.3px;
}

.login-header p{
  margin:4px 0 0;
  color:rgba(255,255,255,0.7);
  font-size:13px;
  font-weight:400;
}

.login-body{
  padding:28px 28px 0;
}

.form-group{
  margin-bottom:18px;
}

.form-group label{
  display:block;
  font-size:13px;
  font-weight:600;
  color:#475569;
  margin-bottom:6px;
  letter-spacing:0.2px;
  text-transform:uppercase;
}

.form-group input[type="text"],
.form-group input[type="password"]{
  width:100%;
  padding:12px 14px;
  border:1.5px solid #e2e8f0;
  border-radius:10px;
  font-size:14px;
  font-family:inherit;
  color:#1e293b;
  background:#f8fafc;
  transition:all 0.2s ease;
  outline:none;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus{
  border-color:#0d6efd;
  background:#fff;
  box-shadow:0 0 0 3px rgba(13,110,253,0.15);
}

.form-group input[type="text"]::placeholder,
.form-group input[type="password"]::placeholder{
  color:#94a3b8;
}

.login-footer{
  padding:4px 28px 28px;
}

.btn-login{
  display:block;
  width:100%;
  padding:13px 24px;
  background:linear-gradient(135deg,#0d6efd,#0a58ca);
  color:#fff;
  border:none;
  border-radius:10px;
  font-size:15px;
  font-weight:600;
  font-family:inherit;
  cursor:pointer;
  transition:all 0.2s ease;
  letter-spacing:0.5px;
  text-transform:uppercase;
}

.btn-login:hover{
  transform:translateY(-1px);
  box-shadow:0 8px 24px rgba(13,110,253,0.35);
}

.btn-login:active{
  transform:translateY(0);
  box-shadow:0 4px 12px rgba(13,110,253,0.25);
}

.login-error{
  background:#fef2f2;
  border:1px solid #fecaca;
  color:#b91c1c;
  border-radius:10px;
  padding:10px 14px;
  font-size:13px;
  margin-bottom:18px;
  text-align:center;
}

@media (max-width:480px){
  body{padding:12px}
  .login-card{border-radius:16px}
  .login-header{padding:24px 20px 20px}
  .login-header img{width:44px;height:44px}
  .login-header h1{font-size:18px}
  .login-body{padding:20px 20px 0}
  .login-footer{padding:4px 20px 20px}
}