* {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  background: #f4f7fb;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.box {
  background: #fff;
  width: 100%;
  max-width: 380px;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.1);
}

.logo {
  text-align: center;
  font-size: 22px;
  font-weight: bold;
  color: #229ed9;
  margin-bottom: 20px;
}

.tabs {
  display: flex;
  margin-bottom: 20px;
}

.tabs button {
  flex: 1;
  border: none;
  padding: 10px;
  cursor: pointer;
  background: #e9eef3;
  font-size: 15px;
}

.tabs button.active {
  background: #229ed9;
  color: #fff;
}

form {
  display: none;
}

form.active {
  display: block;
}

input {
  width: 100%;
  padding: 12px;
  margin-bottom: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
}

button.submit {
  width: 100%;
  padding: 12px;
  background: #229ed9;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  cursor: pointer;
}

.msg {
  text-align: center;
  margin-top: 10px;
  color: red;
  font-size: 14px;
}