* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(ellipse at 50% 0%, #17334a, #09141f 70%);
  color: #fff;
  font-family: Arial, sans-serif;
}

.auth-card {
  width: 100%;
  max-width: 410px;
  padding: 35px 28px;
  background: #102435;
  border: 1px solid #294256;
  border-radius: 18px;
  box-shadow: 0 20px 60px #0005;
}

.logo {
  text-align: center;
  font-size: 44px;
  font-weight: 800;
  letter-spacing: 3px;
}

.logo span {
  color: #69bce9;
}

.subtitle {
  margin: 8px 0 28px;
  color: #9ab2c3;
  text-align: center;
  font-size: 14px;
}

.tabs {
  display: flex;
  padding: 4px;
  background: #091925;
  border-radius: 10px;
  margin-bottom: 28px;
}

.tabs button {
  flex: 1;
  border: 0;
  padding: 12px;
  background: transparent;
  color: #91a8b8;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.tabs button.active {
  background: #263e64;
  color: #fff;
}

h1 {
  margin: 0 0 9px;
  font-size: 24px;
}

.description {
  color: #9ab2c3;
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 25px;
}

label {
  display: block;
  font-size: 13px;
  margin: 18px 0 8px;
  color: #d6e3ed;
}

input {
  display: block;
  width: 100%;
  padding: 14px;
  background: #091925;
  color: white;
  border: 1px solid #35516a;
  border-radius: 8px;
  outline: none;
  font-size: 15px;
}

input:focus {
  border-color: #69bce9;
}

input::placeholder {
  color: #728b9b;
}

#licenseKey {
  text-transform: uppercase;
  letter-spacing: .5px;
}

.hint {
  color: #8da7b9;
  font-size: 12px;
  line-height: 1.5;
}

#authError {
  color: #ff9b9b;
  font-size: 13px;
  min-height: 18px;
  margin-top: 20px;
}

.submit {
  width: 100%;
  padding: 15px;
  margin-top: 8px;
  background: #0077d2;
  border: 0;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

.submit:hover {
  background: #168de4;
}

.submit:disabled {
  opacity: .6;
  cursor: wait;
}

.footer {
  margin: 28px 0 0;
  text-align: center;
  font-size: 12px;
  color: #68859a;
}

[hidden] {
  display: none !important;
}