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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.login-box {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
  width: 90%;
  max-width: 360px;
  text-align: center;
}

.login-box h1 { color: #333; margin-bottom: 5px; }
.login-box h2 { color: #667eea; font-size: 16px; margin-bottom: 25px; font-weight: normal; }

.login-box input {
  width: 100%;
  padding: 12px;
  margin-bottom: 15px;
  border: 2px solid #eee;
  border-radius: 8px;
  font-size: 15px;
  outline: none;
}

.login-box input:focus { border-color: #667eea; }

.login-box button {
  width: 100%;
  padding: 12px;
  background: #667eea;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

.login-box button:hover { background: #5568d3; }

.login-box .link { margin-top: 15px; font-size: 14px; color: #666; }
.login-box .link a { color: #667eea; text-decoration: none; font-weight: bold; }
#mensagem { margin-top: 15px; font-size: 14px; }