/* RESET & BASE */
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body{
  min-height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  background:#f2f2f2;
}

/* CARD PRINCIPALE */
.card{
  width:1000px;
  height:550px;
  border-radius:25px;
  display:flex;
  overflow:hidden;
  box-shadow:0 25px 50px rgba(0,0,0,0.25);
  transition: all 0.6s ease;
}

/* LEFT & RIGHT */
.left, .right{
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  position: relative;
  transition: all 0.6s ease;
}

/* LEFT SIDE */
.left{
  background: linear-gradient(390deg,#f79030de,#449ab0);
}

.left img{
  width:65%;
  animation: float 4s ease-in-out infinite;
  position: relative; /* Ajouter position relative */
  will-change: transform; /* Optimise les animations */
}

@keyframes float{
  0% { transform: translateY(0px); }
  25% { transform: translateY(-10px); }
  50% { transform: translateY(0px); }
  75% { transform: translateY(10px); }
  100% { transform: translateY(0px); }
}

/* RIGHT SIDE */
.right{
  background:#fff;
  position:relative;
  overflow:hidden;
}

/* FORMULAIRES DANS RIGHT */
.form{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:40px;
  background:#fff;
  opacity:0;
  pointer-events:none;
  transition: all 0.6s ease;
  z-index:2;
}

.form h1{
  text-align:center;
  margin-bottom:30px;
  font-size:28px;
  color:#333;
}

.input-group{
  margin-bottom:20px;
}

.input-group input{
  width:100%;
  border:none;
  border-bottom:2px solid #ddd;
  padding:10px 0;
  font-size:16px;
  outline:none;
  transition:0.3s;
}

.input-group input:focus{
  border-bottom:2px solid #449ab0;
}

button{
  width:100%;
  padding:15px;
  border:none;
  border-radius:30px;
  background: linear-gradient(135deg,#f78f30,#449ab0);
  color:white;
  font-size:15px;
  cursor:pointer;
  font-weight:bold;
  letter-spacing:1px;
  margin-top:10px;
  transition:0.3s;
}

button:hover{
  transform:scale(1.05);
  box-shadow:0 10px 25px rgba(0,0,0,0.2);
}

.register{
  text-align:center;
  margin-top:20px;
  font-size:14px;
}

.register a{
  color:#f78f30;
  font-weight:bold;
  text-decoration:none;
}

.register a:hover{
  color:#449ab0;
}

/* LOGIN DANS RIGHT */
.login-form.active{
  opacity:1;
  pointer-events:auto;
  transform: translateX(0);
}

/* REGISTER DANS RIGHT (CONTENU LEFT) */
.register-form.active{
  opacity:1;
  pointer-events:auto;
  transform: translateX(0);
}

/* SWITCH - inverser visual LEFT et RIGHT */
.card.swap .left img {
  animation: float 4s ease-in-out infinite;
}

.card.swap .right{
  order:1; /* right passe à gauche */
}
.left, .right{
  transition: all 0.6s ease, transform 0.6s ease;
}
/* RESPONSIVE */
@media(max-width:900px){
  .card{
    flex-direction:column;
    width:90%;
    height:auto;
  }
  .left, .right{
    width:100%;
    height:250px;
  }
  .form{
    position:relative;
    width:100%;
    height:auto;
    padding:20px;
  }
}