@import url("https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Sarabun", "Poppins", sans-serif;
  text-decoration: none;
  list-style: none;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(90deg, #e2e2e2, #c9d6ff);
}

.back-to-home {
  margin-top: 20px;
  text-align: center;
  width: 100%;
}

.back-to-home a {
  color: #0f83e2;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.3s;
}

.back-to-home a:hover {
  color: #5a7de0;
  text-decoration: underline;
}

.container {
  position: relative;
  width: 850px;
  max-width: calc(100% - 40px);

  /* ✅ FIX: สูงตามจอ ไม่บังคับ 550 ตายตัว */
  height: min(550px, calc(100vh - 40px));

  background: #fff;
  margin: 20px;
  border-radius: 30px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.container h1 {
  font-size: 36px;
  margin: -10px 0;
}

.container p {
  font-size: 14.5px;
  margin: 15px 0;
}

form {
  width: 100%;
}

/* ✅ ฟอร์มชิดบน */
.form-box {
  position: absolute;
  right: 0;
  width: 50%;
  height: 100%;
  background: #fff;

  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
  text-align: center;

  padding: 40px;
  z-index: 1;

  /* ✅ เป้าหมายคือ “ไม่ต้องเลื่อน” */
  overflow: hidden;

  transition: 0.6s ease-in-out 1.2s, visibility 0s 1s;
}

.form-box form {
  width: 100%;
  max-width: 360px;
  padding: 6px 0;
}

.container.active .form-box {
  right: 50%;
}

.form-box.register {
  visibility: hidden;
}
.container.active .form-box.register {
  visibility: visible;
}

.input-box {
  position: relative;
  margin: 22px 0;
}

.input-box input {
  width: 100%;
  padding: 13px 50px 13px 20px;
  background: #eee;
  border-radius: 8px;
  border: none;
  outline: none;
  font-size: 16px;
  color: #333;
  font-weight: 500;

  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Style browser's date input */
.input-box input[type="date"] {
  position: relative;
  color-scheme: light;
  cursor: pointer;
}

.input-box input[type="date"]::-webkit-calendar-picker-indicator {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  color: transparent;
  background: transparent;
  cursor: pointer;
  opacity: 0;
}

.input-box input[type="date"]::-webkit-inner-spin-button,
.input-box input[type="date"]::-webkit-clear-button {
  display: none;
}

.input-box input::placeholder {
  color: #888;
  font-weight: 400;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.input-box i {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  pointer-events: none; /* Allow clicks to pass through icon to input */
}

.forgot-link {
  margin: -15px 0 15px;
  text-align: right;
}
.forgot-link a {
  font-size: 14.5px;
  color: #333;
}

.btn {
  width: 100%;
  height: 48px;
  background: #0f83e2;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: #fff;
  font-weight: 600;
}

.social-icons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.social-icons a {
  display: inline-flex;
  padding: 10px;
  border: 2px solid #ccc;
  border-radius: 8px;
  font-size: 24px;
  color: #333;
  margin: 0;
}

/* ✅ (คงไว้) ซ่อน social ตอน Register ให้พอดีจอง่ายขึ้น */
.form-box.register .social-icons {
  display: none;
}

/* ✅ FIX สำคัญ: ตอนเป็น Register ให้ “บีบ” ทุกอย่างให้พอดีจอ */
.container.active .form-box.register h1 {
  font-size: 30px;
  margin: 0 0 16px;
}
.container.active .form-box.register p {
  display: none; /* ซ่อน "or register with..." ให้มีพื้นที่ */
}
.container.active .form-box.register .input-box {
  margin: 20px 0;
}
.container.active .form-box.register .input-box input {
  padding: 12px 46px 12px 16px;
  font-size: 15px;
}
.container.active .form-box.register .btn {
  height: 44px;
  margin-top: 8px;
}

/* ✅ ถ้าจอเตี้ยมาก (โน้ตบุ๊ค/มือถือบางรุ่น) บีบเพิ่มอีกนิด */
@media screen and (max-height: 700px) {
  .container.active .form-box.register h1 { font-size: 28px; }
  .container.active .form-box.register .input-box { margin: 10px 0; }
  .container.active .form-box.register .input-box input { font-size: 14.5px; }
  .container.active .form-box.register .btn { height: 42px; }
}

.toggle-box {
  position: absolute;
  width: 100%;
  height: 100%;
}

.toggle-box::before {
  content: "";
  position: absolute;
  left: -250%;
  width: 300%;
  height: 100%;
  background: #0f83e2;
  border-radius: 150px;
  z-index: 2;
  transition: 1.8s ease-in-out;
}

.container.active .toggle-box::before {
  left: 50%;
}

.toggle-panel {
  position: absolute;
  width: 50%;
  height: 100%;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2;
  transition: 0.6s ease-in-out;
}

.toggle-panel.toggle-left {
  left: 0;
  transition-delay: 1.2s;
}
.container.active .toggle-panel.toggle-left {
  left: -50%;
  transition-delay: 0.6s;
}

.toggle-panel.toggle-right {
  right: -50%;
  transition-delay: 0.6s;
}
.container.active .toggle-panel.toggle-right {
  right: 0;
  transition-delay: 1.2s;
}

.toggle-panel p {
  margin-bottom: 20px;
}

.toggle-panel .btn {
  width: 160px;
  height: 46px;
  background: transparent;
  border: 2px solid #fff;
  box-shadow: none;
}

@media screen and (max-width: 650px) {
  .container {
    height: calc(100vh - 40px);
  }

  .form-box {
    bottom: 0;
    width: 100%;
    height: 72%;
    padding: 26px;
  }

  .container.active .form-box {
    right: 0;
    bottom: 28%;
  }

  .toggle-box::before {
    left: 0;
    top: -270%;
    width: 100%;
    height: 300%;
    border-radius: 20vw;
  }

  .container.active .toggle-box::before {
    left: 0;
    top: 70%;
  }

  .container.active .toggle-panel.toggle-left {
    left: 0;
    top: -30%;
  }

  .toggle-panel {
    width: 100%;
    height: 28%;
  }
  .toggle-panel.toggle-left {
    top: 0;
  }
  .toggle-panel.toggle-right {
    right: 0;
    bottom: -30%;
  }

  .container.active .toggle-panel.toggle-right {
    bottom: 0;
  }
}

@media screen and (max-width: 400px) {
  .form-box {
    padding: 18px;
  }

  .toggle-panel h1 {
    font-size: 30px;
  }
}

/* Inline error styles for register form */
.error-text {
  color: #d93025;
  font-size: 13.5px;
  text-align: left;
  margin-top: -10px; /* tuck under the input above */
  margin-bottom: 10px;
}
.input-invalid {
  outline: 2px solid #e57373;
}