:root { color-scheme: light; }
.theme-switch { display:flex; gap:4px; padding:3px; border:1px solid #dedede; border-radius:8px; flex-shrink:0; }
.theme-switch button { display:grid; place-items:center; width:44px; min-width:44px; height:44px; min-height:44px; padding:0; border:2px solid transparent; border-radius:5px; background:transparent; color:#22409a; cursor:pointer; font-size:21px; line-height:1; transition:background-color .15s,transform .1s; }
.theme-switch button[aria-pressed="true"] { background:#e7edff; border-color:#22409a; }
.theme-switch button:hover { background:#eef2fb; }
.theme-switch button:active { transform:scale(.9); }
.theme-switch button:focus-visible { outline:3px solid #22409a; outline-offset:3px; }
.payment-header { max-width:900px; margin:auto; display:flex; align-items:center; justify-content:space-between; gap:20px; }
.payment-header > a { display:flex; align-items:center; gap:16px; margin:0; text-decoration:none; font-weight:600; min-width:0; }
.payment-header > a > img { flex-shrink:0; object-fit:contain; }
html[data-theme="dark"] { color-scheme:dark; --navy:#b7ccff; --blue:#aac6ff; --ink:#e5eaf2; --muted:#b5c0d0; --line:#445064; --bg:#121923; }
html[data-theme="dark"] body { background:var(--bg); color:var(--ink); }
html[data-theme="dark"] header,
html[data-theme="dark"] .card,
html[data-theme="dark"] body > main:not(.wrap),
html[data-theme="dark"] .cookie-banner { background:#1d2735; color:var(--ink); border-color:var(--line); }
html[data-theme="dark"] a,
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] .brand strong,
html[data-theme="dark"] .privacy summary,
html[data-theme="dark"] .section-label { color:var(--blue); }
html[data-theme="dark"] .sub,
html[data-theme="dark"] .muted,
html[data-theme="dark"] dt,
html[data-theme="dark"] .service-note p,
html[data-theme="dark"] .tuition-announcement p { color:var(--muted); }
html[data-theme="dark"] .seal,
html[data-theme="dark"] .payment-header > a > img { background:#fff; padding:5px; border-radius:6px; }
html[data-theme="dark"] .processor-logo { background:#fff; padding:8px; border-radius:6px; }
html[data-theme="dark"] input:not([type="checkbox"]):not([type="hidden"]),
html[data-theme="dark"] select { background:#121c29; color:var(--ink); border-color:#697a93; }
html[data-theme="dark"] input:read-only:not([type="checkbox"]),
html[data-theme="dark"] input:disabled:not([type="checkbox"]),
html[data-theme="dark"] select:disabled { background:#283344; color:#bbc5d4; border-color:#526178; }
html[data-theme="dark"] input::placeholder { color:#aebcd0; opacity:1; }
html[data-theme="dark"] input:focus,
html[data-theme="dark"] select:focus,
html[data-theme="dark"] .privacy-document:focus { outline-color:#aac6ff; }
html[data-theme="dark"] .privacy-document { background:#141e2b; border-color:var(--line); }
html[data-theme="dark"] .notice,
html[data-theme="dark"] .privacy-status { background:#25344c; color:#e5eaf2; border-color:#aac6ff; }
html[data-theme="dark"] .privacy-error { color:#ffb2b2; }
html[data-theme="dark"] hr { border-color:var(--line); }
html[data-theme="dark"] .num { border-color:#697a93; }
html[data-theme="dark"] .active .num { background:#a8c2ff; color:#112044; border-color:#a8c2ff; }
html[data-theme="dark"] .language-switch,
html[data-theme="dark"] .theme-switch { border-color:#697a93; }
html[data-theme="dark"] button,
html[data-theme="dark"] .button { background:#a8c2ff; color:#112044; }
html[data-theme="dark"] button:disabled { background:#344154; color:#c2ccdb; }
html[data-theme="dark"] #pay-button:not(:disabled),
html[data-theme="dark"] .identity .lookup > button:not(:disabled),
html[data-theme="dark"] .privacy button,
html[data-theme="dark"] .cookie-actions button,
html[data-theme="dark"] .language-switch a[aria-current="page"] { background:#a8c2ff; color:#112044; border-color:#a8c2ff; }
html[data-theme="dark"] .cookie-actions button + button { background:#25344c; color:#dbe6ff; }
html[data-theme="dark"] .theme-switch button { background:transparent; color:var(--ink); }
html[data-theme="dark"] .theme-switch button:hover { background:#344154; }
html[data-theme="dark"] .theme-switch button[aria-pressed="true"] { background:#34476c; border-color:#aac6ff; }
html[data-theme="dark"] .theme-switch button:focus-visible,
html[data-theme="dark"] .language-switch a:focus-visible,
html[data-theme="dark"] .cookie-actions button:focus-visible { outline-color:#aac6ff; }
html[data-theme="dark"] .banner h1,
html[data-theme="dark"] .banner .eyebrow { color:#fff; }
html[data-theme="dark"] .start-link { background:#fff; color:#22409a; }
html[data-theme="dark"] .footer-blue,
html[data-theme="dark"] .footer-blue a { color:#fff; }
@media(max-width:600px) {
  .payment-header { gap:12px; flex-wrap:wrap; }
  .payment-header > a { gap:12px; font-size:14px; flex:1 1 230px; }
  .payment-header .theme-switch { margin-left:auto; }
}
@media(prefers-reduced-motion:reduce) { .theme-switch button { transition:none; } }