:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: radial-gradient(120% 80% at 50% 0%, #1b2436, #0d1015 60%);
  color: #eef1f5; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: calc(16px + env(safe-area-inset-top)) 16px calc(16px + env(safe-area-inset-bottom));
}
.card { width: min(26rem, 100%); background: #151a21; border: 1px solid #262d38; border-radius: 1.4rem; padding: 1.8rem 1.5rem; box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.5); }
.logo { font-size: 2.6rem; text-align: center; }
h1 { text-align: center; font-size: 1.5rem; margin: 0.4rem 0 0.3rem; }
.lead { text-align: center; color: #8f99a8; margin: 0 0 1.3rem; line-height: 1.4; }
form { display: flex; flex-direction: column; gap: 0.9rem; }
label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.9rem; font-weight: 650; color: #c4cad4; }
label[hidden] { display: none; }
input {
  font: inherit; font-size: 17px; color: #eef1f5; background: #1c222b;
  border: 1px solid #262d38; border-radius: 0.8rem; padding: 0.8rem 0.9rem; outline: none;
}
input:focus { border-color: #6cb2ff; box-shadow: 0 0 0 3px rgba(108, 178, 255, 0.2); }
button {
  margin-top: 0.4rem; font: inherit; font-size: 1.05rem; font-weight: 750; color: #0d1015; background: #eef1f5;
  border: 0; border-radius: 0.8rem; padding: 0.9rem; cursor: pointer;
}
button:disabled { opacity: 0.6; }
.error { color: #ff6b6b; min-height: 1.2rem; margin: 0; font-weight: 650; text-align: center; }