* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, sans-serif;
  background: #0f0f20;
  color: #fff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.auth-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  width: 100%;
  max-width: 360px;
}
.auth-logo {
  font-size: 13px;
  letter-spacing: 3px;
  color: #ccc;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}
.auth-btn {
  width: 100%;
  max-width: 340px;
  padding: 1.2rem;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  outline: none;
  cursor: pointer;
  background: #16c784;
  color: #000;
  letter-spacing: 1px;
  margin-top: 1rem;
  text-decoration: none;
  display: block;
  text-align: center;
}
.auth-btn:active { opacity: 0.85; }
.auth-msg {
  font-size: 13px;
  color: #ea3943;
  margin-top: 1rem;
  text-align: center;
  min-height: 1.5rem;
}