:root { color-scheme: light dark; }
body { margin: 0; min-height: 100vh; font-family: var(--x-document-font-family, Inter, ui-sans-serif, system-ui, sans-serif); background: var(--x-color-white, #fff); color: var(--x-color-gray-900, #172033); }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: clamp(1.25rem, 5vw, 3rem); box-sizing: border-box; }
.login-layout { width: min(100%, 32rem); display: grid; gap: 2rem; }
.login-card { width: 100%; --x-card-bg: var(--x-color-gray-50); --x-card-border: var(--x-color-gray-200); --x-card-padding: clamp(1.75rem, 5vw, 2.75rem); --x-card-border-radius: 0.75rem; --x-card-shadow: var(--x-shadow-lg); }
:root[data-theme="dark"] .login-card { --x-card-bg: var(--x-color-gray-100); --x-card-border: var(--x-color-gray-300); }
.login-brand { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.5rem; color: var(--x-color-primary-700, #1456a0); font-size: 1.25rem; font-weight: 750; text-align: center; }
.login-card h1 { margin: 0 0 0.5rem; font-size: 1.75rem; }
.login-intro { margin: 0 0 1.75rem; color: var(--x-color-gray-600, #596579); }
.login-error { margin: 0 0 1rem; padding: 0.75rem; border-radius: 0.4rem; color: var(--x-color-danger-700, #9d1c1c); background: var(--x-color-danger-50, #fff0f0); }
.login-form x-form-field { --x-input-max-width: 100%; display: block; width: 100%; }
.login-theme-toggle { position: fixed; top: 1rem; right: 1rem; display: grid; place-items: center; width: 2.5rem; height: 2.5rem; border: 1px solid var(--x-color-gray-300, #c9d0da); border-radius: 50%; color: inherit; background: var(--x-color-gray-50, #fff); cursor: pointer; }
.login-theme-toggle:hover { background: var(--x-color-gray-100, #eef1f5); }

@media (max-width: 30rem) {
  .login-card { --x-card-padding: 1.5rem; }
  .login-card h1 { margin-top: 1.5rem; }
}