:root {
  --bg-color: #121212;
  --card-bg: #1e1e1e;
  --primary-color: #bb86fc;
  --secondary-color: #03dac6;
  --error-color: #cf6679;
  --text-color: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #333333;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 600px;
  padding: 20px;
}

.login-box,
.backup-box,
.thank-you-box {
  background-color: var(--card-bg);
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.login-box {
  padding: 50px;
  display: flex;
  justify-content: center;
}

h1 {
  color: var(--primary-color);
  margin-bottom: 20px;
  text-align: center;
}

.instruction {
  text-align: center;
  margin-bottom: 30px;
  line-height: 1.6;
}

.sso-button {
  background-color: var(--primary-color);
  color: #000;
  border: none;
  padding: 12px 30px;
  font-size: 18px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  text-decoration: none;
  transition: background-color 0.3s, transform 0.2s;
}

.sso-button:hover {
  background-color: #cfb1fc;
  transform: translateY(-2px);
}

.form-group {
  width: 100%;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

input[type="password"] {
  width: 100%;
  padding: 12px;
  background-color: #2c2c2c;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-size: 16px;
}

input[type="file"] {
  width: 100%;
  padding: 10px;
  background-color: #2c2c2c;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-size: 16px;
  cursor: pointer;
}

.submit-button {
  background-color: var(--secondary-color);
  color: #000;
  border: none;
  padding: 12px 30px;
  font-size: 16px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  width: 100%;
  margin-top: 10px;
  transition: background-color 0.3s, transform 0.2s;
}

.submit-button:hover {
  background-color: #3af0dc;
  transform: translateY(-2px);
}

.error-message {
  background-color: rgba(207, 102, 121, 0.2);
  border: 1px solid var(--error-color);
  color: var(--error-color);
  padding: 12px;
  border-radius: 4px;
  margin-bottom: 20px;
  width: 100%;
  text-align: center;
}

.success-message {
  color: var(--secondary-color);
  margin-bottom: 15px;
  text-align: center;
  font-weight: bold;
}

.upload-success {
  background-color: rgba(3, 218, 198, 0.1);
  border: 1px solid var(--secondary-color);
  color: var(--text-color);
  padding: 15px;
  border-radius: 4px;
  margin: 15px 0;
  text-align: center;
}

.upload-success a {
  color: var(--secondary-color);
  text-decoration: underline;
  font-weight: bold;
}

.upload-success a:hover {
  color: #3af0dc;
}

.upload-error {
  background-color: rgba(207, 102, 121, 0.1);
  border: 1px solid var(--error-color);
  color: var(--error-color);
  padding: 15px;
  border-radius: 4px;
  margin: 15px 0;
  text-align: center;
}

.logout-link {
  margin-top: 30px;
}

.logout-link a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

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

/* Responsive adjustments */
@media (max-width: 480px) {
  .container {
    padding: 10px;
  }
  
  .login-box,
  .backup-box,
  .thank-you-box {
    padding: 20px;
  }
  
  .sso-button,
  .submit-button {
    padding: 10px 20px;
  }
}