* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0d2238 100%);
  background-attachment: fixed;
  min-height: 100vh;
  color: #e6e9f4;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-shell { width: 100%; max-width: 440px; }
.brand { text-align: center; margin-bottom: 36px; }
.brand h1 {
  margin: 0 0 8px;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, #6b87ff 0%, #b06bff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand .tagline { margin: 0; color: #94a3c4; font-size: 15px; }
.login-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.4);
}
.login-card h2 { margin: 0 0 6px; font-size: 20px; font-weight: 600; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #b6bedb; }
.login-card input {
  padding: 12px 14px;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: #e6e9f4;
  font-size: 15px;
  font-family: inherit;
}
.login-card input:focus { outline: 2px solid #5b6dde; outline-offset: 1px; }
.login-card button {
  margin-top: 8px;
  padding: 13px 16px;
  background: linear-gradient(90deg, #5b6dde 0%, #8c5bdf 100%);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
  transition: box-shadow 0.2s, transform 0.05s;
}
.login-card button:hover { box-shadow: 0 4px 16px rgba(91,109,222,0.45); }
.login-card button:active { transform: translateY(1px); }
.login-card button:disabled { opacity: 0.6; cursor: wait; }
.error {
  padding: 10px 12px;
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.4);
  border-radius: 8px;
  font-size: 13px;
  color: #fca5a5;
}
.hint { margin: 0; color: #6b7299; font-size: 12px; text-align: center; padding-top: 4px; }
.footer { margin-top: 36px; text-align: center; font-size: 12px; color: #6b7299; }
.footer p { margin: 2px 0; }
.footer .dim { color: #4a5072; }