* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #0b0f14;
  color: #e6edf3;
}
main {
  width: 100%;
  max-width: 380px;
  padding: 2rem;
}
h1 {
  font-size: 1.5rem;
  margin: 0 0 .25rem;
  text-align: center;
}
p.sub {
  color: #9aa7b2;
  text-align: center;
  margin: 0 0 1.5rem;
  font-size: .9rem;
}
form {
  display: flex;
  flex-direction: column;
  gap: .9rem;
}
label {
  font-size: .85rem;
  color: #9aa7b2;
  margin-bottom: .3rem;
  display: block;
}
input {
  width: 100%;
  padding: .65rem .75rem;
  border-radius: 8px;
  border: 1px solid #263241;
  background: #121821;
  color: #e6edf3;
  font-size: 1rem;
}
input:focus {
  outline: none;
  border-color: #4f8cff;
}
button {
  margin-top: .3rem;
  padding: .7rem;
  border-radius: 8px;
  border: none;
  background: #4f8cff;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: #3d78e6; }
button:disabled { opacity: .6; cursor: default; }
.error {
  background: #3a1414;
  border: 1px solid #5c2222;
  color: #ff9b9b;
  padding: .6rem .75rem;
  border-radius: 8px;
  font-size: .85rem;
  display: none;
}
.error.show { display: block; }
.foot {
  text-align: center;
  margin-top: 1.25rem;
  font-size: .85rem;
  color: #9aa7b2;
}
.foot a { color: #4f8cff; text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.card {
  background: #121821;
  border: 1px solid #263241;
  border-radius: 12px;
  padding: 2rem;
}