/* Presentation-only refinements; no game layout or scoring changes. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
body[data-screen="classroom"] .topbar{border-bottom-color:#67b5e52e;background:linear-gradient(100deg,#081b2c,#123653)}
body[data-screen="classroom"] .brand{box-shadow:0 4px 22px #0003;border-radius:12px;overflow:hidden}
body[data-screen="classroom"] .welcome-stage{border-bottom:1px solid #89bbdc26;margin-bottom:26px;padding-bottom:32px}
.class-shell .role-card{border-color:#8cc9ed4a;box-shadow:0 12px 28px #0002,inset 0 1px 0 #ffffff12}
.class-shell .role-card:focus-visible{outline:3px solid #ffe09a;outline-offset:5px}
.student-safety{padding:14px 16px;border-inline-start:3px solid #f4b517;border-radius:0 10px 10px 0;background:#f4b5170b;color:#d8e7f3;font-size:.85rem;line-height:1.65;margin:18px 0;max-width:72ch}
body footer.site-footer{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px 30px;position:relative;max-width:1120px;margin:0 auto;padding:28px 32px 24px;border-top:1px solid #89bbdc33;background:transparent;color:#b8ccdd;text-align:start;font-size:.8rem;line-height:1.6}
.site-footer .footer-identity{display:flex;flex-direction:column;gap:4px}.site-footer .footer-identity strong{font-size:.96rem;font-weight:600;color:#edf6ff}.site-footer .footer-identity strong span{color:#f9d281}.site-footer .footer-identity>span{font-size:.78rem;color:#a9c2d5}
.site-footer nav{display:flex;flex-wrap:wrap;gap:8px 22px}.site-footer nav a{display:inline-flex;align-items:center;min-height:44px;font-weight:600;color:#dfedfa;text-decoration:underline;text-underline-offset:4px}.site-footer>p{flex-basis:100%;margin:0;color:#a9c2d5;font-size:.72rem}.site-footer p a{color:inherit}.site-footer a:hover{color:#ffde92}.site-footer a:focus-visible{outline:3px solid #ffde92;outline-offset:4px;border-radius:3px}
@media(max-width:600px){body footer.site-footer{padding:24px 20px;gap:12px}.site-footer .footer-identity,.site-footer nav{width:100%}.site-footer nav{gap:10px 24px}body[data-screen="classroom"] .welcome-stage{margin-bottom:20px;padding-bottom:24px}.student-safety{font-size:.82rem}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
@media print{body footer.site-footer{color:#163f6d;background:white;border-color:#aac;break-inside:avoid}.site-footer nav{display:none}.site-footer .footer-identity strong,.site-footer .footer-identity strong span,.site-footer>p{color:#163f6d}}