/* Reset */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, Arial;
  background: #0f172a;
  color: #e2e8f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Container */
.login-container {
  background: #111827;
  padding: 24px;
  border-radius: 12px;
  width: 320px;
  text-align: center;
  border: 1px solid #1f2937;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

h1 { margin-bottom: 20px; font-size: 20px; }

/* Fields */
.field { margin-bottom: 15px; text-align: left; }
label { display: block; margin-bottom: 6px; font-size: 14px; opacity: .85; }
input {
  width: 100%; padding: 10px;
  border: 1px solid #1e293b;
  border-radius: 8px;
  background: #0b1220; color: #e2e8f0;
}
input:focus { outline: 2px solid #2563eb; }

/* Button */
button {
  width: 100%;
  background: #2563eb;
  border: none;
  padding: 10px;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: background .2s;
}
button:hover { background: #1e40af; }

/* Error */
.error { color: #f87171; margin-top: 10px; font-size: 14px; }