* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Animated Background Particles */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

.particle {
  position: absolute;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: float 15s infinite ease-in-out;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) translateX(100px) rotate(360deg);
    opacity: 0;
  }
}

/* Animated Background Gradients */
.bg-animation {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.bg-animation::before,
.bg-animation::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.5;
  animation: pulse 8s infinite ease-in-out;
}

.bg-animation::before {
  width: 500px;
  height: 500px;
  background: #f093fb;
  top: -250px;
  right: -250px;
  animation-delay: 0s;
}

.bg-animation::after {
  width: 600px;
  height: 600px;
  background: #4facfe;
  bottom: -300px;
  left: -300px;
  animation-delay: 4s;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.3);
    opacity: 0.8;
  }
}

/* Login Container */
.login-container {
  position: relative;
  z-index: 10;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

/* Glassmorphism Card */
.login-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 50px 40px;
  min-width: 420px;
  max-width: 450px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  animation: slideIn 0.6s ease-out;
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(45deg);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(45deg);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Logo/Icon */
.login-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 30px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
  animation: bounce 2s infinite;
}

.login-icon i {
  font-size: 40px;
  color: white;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Title */
.login-title {
  text-align: center;
  color: white;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  letter-spacing: 1px;
}

.login-subtitle {
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin-bottom: 40px;
}

/* Form Elements */
.form-group {
  position: relative;
  margin-bottom: 30px;
}

.form-label {
  color: white;
  font-weight: 600;
  margin-bottom: 10px;
  display: block;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.input-wrapper {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(102, 126, 234, 0.6);
  font-size: 18px;
  transition: all 0.3s ease;
  z-index: 1;
}

.form-control {
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  padding: 15px 20px 15px 50px;
  color: #333;
  font-size: 15px;
  transition: all 0.3s ease;
  width: 100%;
}

.form-control:focus {
  background: white;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
  outline: none;
  transform: translateY(-2px);
}

.form-control:focus + .input-icon {
  color: #667eea;
  transform: translateY(-50%) scale(1.1);
}

.form-control::placeholder {
  color: rgba(0, 0, 0, 0.4);
}

/* Button */
.btn-login {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
  position: relative;
  overflow: hidden;
  margin-top: 10px;
}

.btn-login::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-login:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

.btn-login:hover::before {
  width: 300px;
  height: 300px;
}

.btn-login:active {
  transform: translateY(-1px);
}

.btn-login span {
  position: relative;
  z-index: 1;
}

/* Alert */
.alert {
  background: rgba(220, 53, 69, 0.9);
  border: none;
  border-radius: 12px;
  color: white;
  padding: 15px;
  margin-bottom: 25px;
  animation: shake 0.5s;
  backdrop-filter: blur(10px);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Loading Animation */
.btn-login.loading {
  pointer-events: none;
}

.btn-login.loading span {
  opacity: 0;
}

.btn-login.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 480px) {
  .login-card {
    min-width: 100%;
    padding: 40px 30px;
  }
  .login-title {
    font-size: 26px;
  }
}

/* Input Animation */
@keyframes inputFocus {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.form-control:focus {
  animation: inputFocus 0.3s ease;
}