* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #17253d;
  color: #fff;
  font-family: Arial, sans-serif;
}

.menu-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: #0f1a2c;
}

.menu-bar a, .link-button {
  color: #cbd5e1;
  text-decoration: none;
  font: inherit;
}

.menu-bar a:hover, .link-button:hover { color: #fff; }
.menu-bar nav { display: flex; gap: 20px; align-items: center; }
.brand { font-weight: bold; color: #fff !important; }

.center {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 24px 16px;
}

h1 { font-size: 42px; margin-bottom: 16px; }
p { color: #cbd5e1; }

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 340px;
  text-align: left;
}

.card h1 { font-size: 32px; text-align: center; }

input[type="password"], input[type="text"] {
  padding: 12px;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0f1a2c;
  color: #fff;
  font-size: 16px;
}

.button {
  padding: 12px;
  background: #3b82f6;
  color: #fff;
  border: 0;
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
}

.button:hover { background: #2563eb; }
.button:disabled { opacity: 0.6; cursor: default; }
.error { color: #f87171; }
.inline { display: inline; }
.link-button { background: none; border: 0; cursor: pointer; }
.demo { margin-top: 32px; }