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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.bg-video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -1;
}

.wrapper {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.sign-form {
  width: 420px;
  max-width: 90%;
  min-width: 250px;
  padding: 50px 35px;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(15px);
  border-radius: 25px;
  display: flex;
  flex-direction: column;
  gap: 25px;
  color: #fff;
  transition: 0.3s;
}

.heading {
  text-align: center;
  font-weight: 600;
  font-size: 1.8em;
}

.input-box {
  position: relative;
  width: 100%;
}

.input-box input {
  width: 100%;
  padding: 15px 40px 12px 0;
  font-size: 16px;
  color: #fff;
  background: transparent;
  border: none;
  outline: none;
}

.input-box label {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  pointer-events: none;
  transition: 0.3s;
}

.input-box input:focus ~ label,
.input-box input:not(:placeholder-shown) ~ label {
  top: -8px;
  font-size: 13px;
  color: #fff;
  transition: 0.3s;
}

.input-box .line {
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.4);
}

.input-box .line::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0%;
  height: 100%;
  background: #fff;
  transition: 0.3s;
}

.input-box input:focus ~ .line::after {
  width: 100%;
}

.input-box i {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px; /* Desktop icon bada */
  color: rgba(255, 255, 255, 0.85);
}

.login-btn,
.signup-btn {
  width: 100%;
  padding: 14px;
  border-radius: 30px;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

.account-text {
  margin-top: 10px;
  font-size: 16px;
  color: #ccc;
  text-align: center;
}

.account-text a {
  color: #22c55e;
  text-decoration: none;
  font-weight: 500;
}

.account-text a:hover {
  text-decoration: underline;
}

.signup-btn {
  background: #fff;
  font-weight: 900;
  border: none;
  color: #333;
}

.signup-btn:hover {
  transform: scale(1.05);
}

.link-btn {
  text-decoration: none;
  text-align: center;
  display: block;
}

@media (max-width: 1024px) {
  .sign-form {
    width: 380px;
    padding: 45px 30px;
  }
  .heading {
    font-size: 1.7em;
  }
}

@media (max-width: 768px) {
  .sign-form {
    width: 320px;
    padding: 40px 25px;
  }
  .heading {
    font-size: 1.6em;
  }
  .input-box input {
    font-size: 15px;
    padding: 12px 35px 10px 0;
  }
}

@media (max-width: 480px) {
  .sign-form {
    width: 90%;
    padding: 35px 20px;
    gap: 20px;
  }
  .heading {
    font-size: 1.4em;
  }
  .input-box input {
    font-size: 14px;
    padding: 10px 30px 8px 0;
  }
  .input-box i {
    font-size: 16px;
  }
  .login-btn,
  .signup-btn {
    font-size: 15px;
    padding: 12px;
  }
}

@media (max-width: 320px) {
  .sign-form {
    min-width: 250px;
    width: 95%;
    padding: 30px 15px;
    gap: 15px;
  }
  .heading {
    font-size: 1.3em;
  }
  .input-box input {
    font-size: 13px;
    padding: 8px 25px 6px 0;
  }
}

.success-popup {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 9999;
}

.success-popup.active {
  opacity: 1;
  pointer-events: all;
}

.popup-box {
  background: linear-gradient(135deg, #1f2933, #111827);
  padding: 35px 55px;
  border-radius: 18px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  animation: popupZoom 0.35s ease;
}

.checkmark {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.15);
  border: 4px solid #22c55e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: #22c55e;
  margin: 0 auto 15px;
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.6);
  animation: pulse 1.5s infinite;
}

.popup-box h2 {
  color: #fff;
  margin-bottom: 6px;
  font-size: 22px;
}

.popup-box p {
  color: #cbd5e1;
  font-size: 14px;
}

@keyframes popupZoom {
  from {
    transform: scale(0.7) translateY(20px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.5);
  }
  50% {
    box-shadow: 0 0 30px rgba(34, 197, 94, 0.9);
  }
  100% {
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.5);
  }
}