.student-session-warning[hidden]{display:none!important}
.student-session-warning{position:fixed;inset:0;z-index:10000;display:grid;place-items:center;padding:1rem;background:rgba(4,31,55,.62)}
.student-session-warning-card{width:min(520px,100%);padding:2rem;border:2px solid #c88b18;border-radius:16px;background:#fff;box-shadow:0 24px 70px rgba(3,30,52,.32);color:#082f52}
.student-session-warning-card h2{margin:.25rem 0 .75rem;font-size:clamp(1.65rem,4vw,2.25rem)}
.student-session-warning-card p{font-size:1.05rem;line-height:1.6}
.student-session-countdown{padding:.8rem 1rem;border-radius:9px;background:#fff4d8}
.student-session-countdown strong{font-size:1.3rem;color:#825600}
.student-session-warning-card button{min-width:150px}