:root[data-theme="dark"] body { color: #e6edf5; background: #0d1724; }
:root[data-theme="dark"] main { background: #172333; border-color: #34465c; }
:root[data-theme="dark"] p, :root[data-theme="dark"] small { color: #acbdd0; }
:root[data-theme="dark"] .eyebrow { color: #7dd3fc; }
.auth-preferences { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 24px; }
.preference-toggle { display: inline-flex; gap: 2px; padding: 3px; border: 1px solid #dfe6ef; border-radius: 12px; }
.preference-toggle button { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; min-height: 34px; padding: 6px 8px; border: 1px solid transparent; border-radius: 8px; color: #64748b; background: transparent; font: inherit; font-size: 12px; font-weight: 700; line-height: 1; cursor: pointer; }
.preference-toggle button:hover { color: #111827; background: #f1f5f9; }
.preference-toggle button[aria-pressed="true"] { color: #075985; background: #e0f2fe; border-color: #bae6fd; }
.preference-toggle button:focus-visible { outline: 2px solid #0284c7; outline-offset: 2px; }
:root[data-theme="dark"] .preference-toggle { border-color: #34465c; }
:root[data-theme="dark"] .preference-toggle button { color: #acbdd0; }
:root[data-theme="dark"] .preference-toggle button:hover { color: #e6edf5; background: #101b2a; }
:root[data-theme="dark"] .preference-toggle button[aria-pressed="true"] { color: #7dd3fc; background: #173449; border-color: #38627b; }
:root[data-theme="dark"] .preference-toggle button:focus-visible { outline-color: #7dd3fc; }