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

body {
  background: linear-gradient(to right, #e2e2e2, #c9d6ff);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background-color: #fff;
  border-radius: 30px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.35);
  position: relative;
  overflow: hidden;
  width: 768px;
  max-width: 100%;
  min-height: 480px;
}

.container form {
  background-color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 40px;
  height: 100%;
}

.container input {
  background-color: #eee;
  border: none;
  margin: 8px 0;
  padding: 10px 15px;
  font-size: 13px;
  border-radius: 8px;
  width: 100%;
  outline: none;
}

.container button {
  background-color: hsl(180, 98%, 31%); /* nút tím */
  color: #fff;
  font-size: 12px;
  padding: 10px 45px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-top: 10px;
  cursor: pointer;
}

.form-container {
  position: absolute;
  top: 0;
  height: 100%;
  transition: all 0.6s ease-in-out;
}

.sign-in {
  left: 0;
  width: 50%;
  z-index: 2;
}

.sign-up {
  left: 0;
  width: 50%;
  opacity: 0;
  z-index: 1;
}

.container.active .sign-in {
  transform: translateX(100%);
}

.container.active .sign-up {
  transform: translateX(100%);
  opacity: 1;
  z-index: 5;
  animation: move 0.6s;
}

@keyframes move {
  0%, 49.99% {
    opacity: 0;
    z-index: 1;
  }
  50%, 100% {
    opacity: 1;
    z-index: 5;
  }
}

.toggle-container {
  position: absolute;
  top: 0;
  left: 50%;
  width: 50%;
  height: 100%;
  overflow: hidden;
  transition: all 0.6s ease-in-out;
  border-radius: 150px 0 0 100px;
  z-index: 1000;
}

.container.active .toggle-container {
  transform: translateX(-100%);
  border-radius: 0 150px 100px 0;
}

.toggle {
  background: linear-gradient(to right, hsl(180, 98%, 31%), #49a09d); /* gradient tím-xanh */
  color: #fff;
  position: relative;
  left: -100%;
  height: 100%;
  width: 200%;
  transform: translateX(0);
  transition: all 0.6s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center; /* ✅ căn giữa nội dung trái/phải */
}

.container.active .toggle {
  transform: translateX(50%);
}

.toggle-panel {
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;       /* ✅ căn giữa ngang */
  justify-content: center;   /* ✅ căn giữa dọc */
  padding: 0 30px;
  text-align: center;        /* ✅ chữ giữa */
  transition: all 0.6s ease-in-out;
}

.toggle-left {
  transform: translateX(-100%);
}

.container.active .toggle-left {
  transform: translateX(0);
}

.toggle-right {
  right: 0;
  transform: translateX(0);
}

.container.active .toggle-right {
  transform: translateX(200%);
}

/* Nút Trải nghiệm ngay */
.skip-btn {
  margin-top: 10px;
  color: hsl(180, 98%, 31%);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid hsl(180, 98%, 31%);
  padding: 8px 20px;
  border-radius: 20px;
  transition: 0.3s;
}

.skip-btn:hover {
  background-color: hsl(180, 98%, 31%);
  color: #fff;
}