@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #8e24aa;
  --primary-dark: #6a1b9a;
  --secondary: #3f51b5;
  --dark: #232342;
  --darker: #121212;
  --light: #f9fafb;
  --gray: #64748b;
  --light-gray: #f1f5f9;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  --dark-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  --primary-gradient: linear-gradient(135deg, #673ab7 0%, #9c27b0 100%);
  --hover-gradient: linear-gradient(135deg, #5e35b1 0%, #8e24aa 100%);
  --teal-gradient: linear-gradient(120deg, #35a79c, #209cb3, #1e4a69);
}

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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: var(--light);
  transition: all 0.3s ease;
  position: relative;
}

/* Background pattern with subtle purple tint */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(45deg, rgba(142, 36, 170, 0.02) 25%, transparent 25%), 
    linear-gradient(-45deg, rgba(142, 36, 170, 0.02) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(142, 36, 170, 0.02) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(142, 36, 170, 0.02) 75%);
  background-size: 20px 20px;
  z-index: -1;
}

/* Dark mode */
body.dark {
  background-color: var(--darker);
  color: var(--light);
}

body.dark::after {
  background-image: 
    linear-gradient(45deg, rgba(156, 39, 176, 0.03) 25%, transparent 25%), 
    linear-gradient(-45deg, rgba(156, 39, 176, 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(156, 39, 176, 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(156, 39, 176, 0.03) 75%);
}

/* Login container */
.login-wrapper {
  width: 450px;
  background: white;
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transition: all 0.3s ease;
}

body.dark .login-wrapper {
  background: var(--dark);
  box-shadow: var(--dark-shadow);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Decorative header with animated gradient */
.login-header {
  background: var(--primary-gradient);
  height: 8px;
  width: 100%;
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
}

body.dark .login-header {
  background: var(--teal-gradient);
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
}

/* Form styling */
.login-form {
  padding: 40px;
}

.login-form h1 {
  font-size: 28px;
  font-weight: 600;
  color: #333;
  margin-bottom: 30px;
  text-align: center;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.login-form h1::after {
  content: '';
  position: absolute;
  width: 40%;
  height: 3px;
  background: var(--primary-gradient);
  bottom: -8px;
  left: 30%;
  border-radius: 10px;
}

body.dark .login-form h1 {
  background: linear-gradient(90deg, #ffd700, #e6c200, #b8860b, #ffd700);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent; /* Standard alternative to text-fill-color */
  animation: waveShift 6s ease-in-out infinite;
  text-shadow: 0 0 5px rgba(255, 215, 0, 0.1);
}

@keyframes waveShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  25% {
    background-position: 100% 50%;
  }
  50% {
    background-position: 50% 0%;
  }
  75% {
    background-position: 0% 100%;
  }
}

body.dark .login-form h1::after {
  background: var(--teal-gradient);
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
}

/* Input groups */
.input-group {
  position: relative;
  margin-bottom: 30px;
}

.input-group label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 15px;
  pointer-events: none;
  color: var(--gray);
  font-size: 14px;
  transition: all 0.3s ease;
}

.input-group input {
  width: 100%;
  height: 55px;
  padding: 0 15px 0 15px;
  font-size: 15px;
  border-radius: 12px;
  border: 2px solid var(--light-gray);
  background: transparent;
  color: #333;
  transition: all 0.3s ease;
}

/* Password visibility toggle icon */
.input-group #eyeicon {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--gray);
  font-size: 18px;
  transition: all 0.3s ease;
}

.input-group #eyeicon:hover {
  color: var(--primary);
}

body.dark .input-group #eyeicon {
  color: #a0aec0;
}

body.dark .input-group #eyeicon:hover {
  color: #35a79c;
}

.input-group input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(142, 36, 170, 0.1);
}

/* Active/filled input styling */
.input-group input:not(:placeholder-shown) + label,
.input-group input:focus + label {
  top: 0;
  left: 10px;
  font-size: 12px;
  padding: 0 5px;
  background: white;
  color: var(--primary);
}

body.dark .input-group input:not(:placeholder-shown) + label,
body.dark .input-group input:focus + label {
  background: var(--dark);
  color: #35a79c;
}

body.dark .input-group input {
  border-color: #3d3d6b;
  color: var(--light);
}

body.dark .input-group input:focus {
  border-color: #35a79c;
  box-shadow: 0 0 0 3px rgba(53, 167, 156, 0.2);
}

/* Login button */
.login-btn {
  width: 100%;
  height: 55px;
  background: var(--primary-gradient);
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
  color: white;
  font-size: 16px;
  font-weight: 500;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(142, 36, 170, 0.3);
}

.login-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(142, 36, 170, 0.4);
}

body.dark .login-btn {
  background: var(--teal-gradient);
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
  box-shadow: 0 4px 15px rgba(53, 167, 156, 0.2);
}

body.dark .login-btn:hover {
  box-shadow: 0 8px 25px rgba(53, 167, 156, 0.3);
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  margin: 30px 0;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--light-gray);
}

.divider span {
  padding: 0 15px;
  font-size: 14px;
  color: var(--gray);
}

body.dark .divider::before,
body.dark .divider::after {
  background: #3d3d6b;
}

body.dark .divider span {
  color: #a0aec0;
}

/* Social login */
.social-login {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 30px;
}

.social-btn {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  border: 2px solid var(--light-gray);
  background: white;
  transition: all 0.3s ease;
  cursor: pointer;
}

.social-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(142, 36, 170, 0.15);
  border-color: var(--primary);
}

.social-btn i {
  font-size: 20px;
}

.social-btn.google {
  color: #DB4437;
}

.social-btn.facebook {
  color: #4267B2;
}

.social-btn.twitter {
  color: #1DA1F2;
}

.social-btn.apple {
  color: #000000;
}

body.dark .social-btn {
  background: var(--dark);
  border-color: #3d3d6b;
}

body.dark .social-btn.apple i {
  color: #ffffff;
}

body.dark .social-btn:hover {
  box-shadow: 0 5px 15px rgba(53, 167, 156, 0.25);
  border-color: #35a79c;
}

/* Register link */
.register-link {
  text-align: center;
  margin-top: 25px;
}

.register-link span {
  font-size: 14px;
  color: var(--gray);
}

.register-link a {
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.register-link a:hover {
  text-decoration: underline;
}

body.dark .register-link span {
  color: #a0aec0;
}

body.dark .register-link a {
  color: #35a79c;
}

/* Loading spinner */
.spinner {
  display: none;
  margin: 20px auto;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(142, 36, 170, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Error message */
.error-message {
  text-align: center;
  color: #e53e3e;
  margin-top: 15px;
  font-size: 14px;
}

/* Responsive design */
@media (max-width: 480px) {
  .login-wrapper {
    width: 90%;
    max-width: 400px;
  }
  
  .login-form {
    padding: 30px 20px;
  }
  
  .login-form h1 {
    font-size: 24px;
  }
  
  .input-group {
    margin-bottom: 20px;
  }
  
  .input-group input {
    height: 50px;
  }
  
  .login-btn {
    height: 50px;
  }
  
  .social-btn {
    width: 50px;
    height: 50px;
  }
}