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

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

/* Animated background circles */
body::before,
body::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: float 8s infinite ease-in-out;
}

body::before {
  width: 400px;
  height: 400px;
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

body::after {
  width: 300px;
  height: 300px;
  bottom: -50px;
  right: -50px;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-30px) scale(1.05);
  }
}

.container {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 50px 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
  animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h2 {
  text-align: center;
  color: #333;
  font-size: 32px;
  margin-bottom: 40px;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.input-box input {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  font-size: 15px;
  transition: all 0.3s ease;
  background: #fff;
  color: #333;
  outline: none;
}

.input-box input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  transform: translateY(-2px);
}

.input-box input::placeholder {
  color: #999;
  font-weight: 400;
}

button[type="submit"] {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 10px;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  text-transform: uppercase;
  letter-spacing: 1px;
}

button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
}

button[type="submit"]:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

.login-text {
  text-align: center;
  color: #666;
  font-size: 14px;
  margin-top: 20px;
}

.login-text a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

.login-text a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transition: width 0.3s ease;
}

.login-text a:hover::after {
  width: 100%;
}

.login-text a:hover {
  color: #764ba2;
}

/* Responsive Design */
@media (max-width: 480px) {
  .container {
    padding: 40px 30px;
    margin: 20px;
  }

  h2 {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .input-box input {
    padding: 14px 18px;
    font-size: 14px;
  }

  button[type="submit"] {
    padding: 14px;
    font-size: 15px;
  }
}

/* Loading state for button (optional enhancement) */
button[type="submit"].loading {
  pointer-events: none;
  opacity: 0.7;
  position: relative;
}

button[type="submit"].loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid #fff;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

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