* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: #0b141a;
  color: #e9edef;
  display: flex; align-items: center; justify-content: center;
}
.card {
  background: #111b21;
  border-radius: 12px;
  padding: 32px;
  width: min(420px, 92vw);
  box-shadow: 0 10px 40px rgba(0,0,0,.4);
}
h1 { margin: 0 0 12px; font-size: 22px; }
.muted { color: #8696a0; }
.small { font-size: 12px; }
label { display: block; margin: 14px 0 6px; font-size: 14px; }
input[type=password] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #2a3942;
  background: #202c33;
  color: #e9edef;
  font-size: 16px;
}
input[type=password]:focus { outline: 2px solid #00a884; }
button {
  margin-top: 18px;
  width: 100%;
  background: #00a884;
  color: white;
  border: 0;
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 15px;
}
button:hover { filter: brightness(1.1); }
.error {
  background: #401820;
  color: #f5b5be;
  border: 1px solid #6e2532;
  padding: 10px;
  border-radius: 8px;
  margin: 8px 0;
  font-size: 14px;
}