:root {
  --primary-color: #00b464;
  --secondary-color: #008a4c;
  --background-color: #ffffff;
  --card-background: #f5fff9;
  --text-color: #333333;
  --shadow-color: rgba(0, 255, 150, 0.2);
  --error-color: #ff4444;
  --success-color: #00cc88;
}

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

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--background-color), #e0ffe9);
  font-family: Arial, sans-serif;
  color: var(--text-color);
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
  position: relative;
}

.back-link {
  position: absolute;
  top: -40px;
  left: 20px;
  color: var(--text-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.3s ease;
}

.back-link:hover {
  color: var(--primary-color);
}

.login-card {
  background: linear-gradient(145deg, var(--card-background), #ffffff);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 
    0 10px 30px rgba(0,0,0,0.5),
    0 0 20px var(--shadow-color);
  text-align: center;
}

.logo {
  margin-bottom: 20px;
}

.diamond-icon {
  filter: drop-shadow(0 0 10px var(--shadow-color));
}

h1 {
  color: var(--text-color);
  font-size: 24px;
  margin-bottom: 10px;
  text-shadow: 0 0 10px var(--shadow-color);
}

h2 {
  color: var(--text-color);
  font-size: 18px;
  margin-bottom: 30px;
}

.login-form {
  text-align: left;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-color);
  font-weight: bold;
}

.form-group input {
  width: 100%;
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(0, 255, 150, 0.3);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 10px var(--shadow-color);
}

.password-container {
  position: relative;
}

.toggle-password {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
}

.toggle-password:hover {
  color: var(--primary-color);
}

.password-hint {
  position: absolute;
  top: calc(100% + 5px);
  left: 0;
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  opacity: 0;
  transition: opacity 0.3s ease;
  background: rgba(0,0,0,0.8);
  padding: 8px 12px;
  border-radius: 4px;
  pointer-events: none;
  z-index: 10;
  width: 100%;
}

.password-container input:focus + .password-hint {
  opacity: 1;
}

.login-button {
  width: 100%;
  padding: 12px;
  background: var(--primary-color);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 10px;
}

.login-button:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 180, 100, 0.3);
}

.join-family {
  color: var(--primary-color) !important;
  font-weight: bold;
  border: 1px solid var(--primary-color);
  padding: 8px 16px;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
}

.join-family:hover {
  background: var(--primary-color);
  color: white !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,255,150,0.2);
}

.help-links {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 25px;
}

.help-links a {
  text-align: center;
  color: #ccc;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.help-links a:hover {
  color: var(--primary-color);
}

.error {
  border-color: var(--error-color) !important;
}

.error-message {
  color: var(--error-color);
  font-size: 14px;
  margin-top: 5px;
}

@media (max-width: 480px) {
  .login-container {
    padding: 10px;
  }
  
  .login-card {
    padding: 20px;
  }
}