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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #000;
  color: #fff;
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
  min-height: 100vh;
}

h1 { font-weight: 500; font-size: 1.5rem; margin-bottom: 0.5rem; }
.subtitle { color: #888; font-size: 0.875rem; margin-bottom: 2rem; }

.login-card {
    background: #111;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 2rem;
    max-width: 360px;
    margin: 4rem auto 0;
}
.login-card h2 { font-size: 1rem; font-weight: 500; margin-bottom: 1.5rem; }
.field { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 1rem; }
.field label { font-size: 0.8125rem; color: #888; }
.field input {
    background: #000;
    border: 1px solid #333;
    border-radius: 6px;
    color: #fff;
    font-size: 0.875rem;
    padding: 0.625rem 0.75rem;
    outline: none;
}
.field input:focus { border-color: #666; }
.btn-primary {
    width: 100%;
    background: #fff;
    color: #000;
    border: none;
    padding: 0.625rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    margin-top: 0.5rem;
}
.btn-primary:hover { background: #ccc; }
.btn-primary:disabled { background: #333; color: #666; cursor: not-allowed; }
.divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
    color: #555;
    font-size: 0.75rem;
}
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: #333; }
.btn-microsoft {
    width: 100%;
    background: #000;
    color: #fff;
    border: 1px solid #555;
    padding: 0.625rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.btn-microsoft:hover { border-color: #aaa; background: #111; }
.error-msg { color: #f87171; font-size: 0.8125rem; margin-top: 0.75rem; display: none; }