body {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  color: #222;
  margin: 0;
  padding: 0;
  background-image: url('https://images.unsplash.com/photo-1529678407585-55ac0053aa47?q=80&w=1470&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  height: 100vh;
  overflow: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(213, 200, 228, 0.75); 
  z-index: -1;
}

form {
  max-width: 500px;
  margin: 4rem auto 2rem;
  padding: 2rem;
  background-color: rgba(197, 177, 206, 0.932); 
  border-radius: 12px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.1);
  box-sizing: border-box;
  color: #222;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, #description, .up {
  color: #222;
  text-align: center;
  margin-bottom: 1rem;
}

.group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

input, button {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.75rem;
  border-radius: 8px;
  border: 2px solid #d3c5ee; 
  background-color: #e4daf1;
  box-sizing: border-box;
  color: #222;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

input:focus {
  border-color: #a897e6;
  outline: none;
  background-color: #e8e4f9;
}

button {
  background-color: #a897e6; 
  color: #fff;
  cursor: pointer;
  border: none;
  transition: background-color 0.3s, transform 0.3s;
}

button:hover {
  background-color: #8a77d7;
  transform: translateY(-2px);
}

.password-wrapper {
  display: flex;
  gap: 8px;
}

.password-wrapper input {
  flex: 1;
}

.password-wrapper button {
  padding: 0 1rem;
  background-color: #a897e6; 
  color: white;
  border-radius: 8px;
}

.checkboxes label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.5rem;
  color: #333;
}

.error-msg {
  color: #e74c3c; 
  font-size: 0.8rem;
  margin-top: 0.25rem;
  height: 1rem;
}

.up {
  color: #222;
  text-align: center;
  font-size: 0.95rem;
}

body.dark {
  background-color: #121212;
  color: #ddd;
  background-image: url('https://images.unsplash.com/photo-1529678407585-55ac0053aa47?q=80&w=1470&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  position: relative;
}

body.dark::before {
  background: rgba(33, 20, 80, 0.7); 
  z-index: -1;
}

body.dark form {
  background-color: rgba(37, 33, 67, 0.85); 
  color: #ddd;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.8);
}

body.dark input {
  background-color: #444466;
  color: #ddd;
  border-color: #7f75b9;
}

body.dark input:focus {
  background-color: #5f5ac1;
  border-color: #b4adf7;
}
body.dark h1,
body.dark #description,
body.dark .up {
  color: #ddd; 
}
body.dark button,
body.dark .password-wrapper button {
  background-color: #8f88e6;
}

body.dark button:hover {
  background-color: #6d69c3;
}

body.dark .checkboxes label {
  color: #ddd;
}

body.dark #theme-toggle {
  background-color: #8f88e6;
  color: white;
}

body.dark #theme-toggle:hover {
  background-color: #6d69c3;
}


@media (max-width: 600px) {
  form {
    margin: 2rem 1rem;
    padding: 1.5rem;
  }

  .password-wrapper {
    flex-direction: column;
  }

  .checkboxes label {
    flex-direction: row;
  }
}

#theme-toggle {
  position: fixed;
  top: 10px;
  right: 10px;
  background-color: #a897e6; 
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  z-index: 10;
  transition: background-color 0.3s;
}

#theme-toggle:hover {
  background-color: #8a77d7;
}