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(max-width:640px){.clc-teachers{grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:78%;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:6px;scrollbar-width:none}.clc-teacher{scroll-snap-align:start}}.clc-vspin{position:absolute;top:50%;left:50%;width:64px;height:64px;margin:-32px 0 0 -32px;border-radius:999px;border:4px solid rgba(241,245,249,.18);border-top:4px solid var(--green);animation:clc-spin .8s linear infinite;pointer-events:none;z-index:2;box-shadow:0 0 0 9999px rgba(5,5,5,0)}@media (prefers-reduced-motion:reduce){.clc-vspin{animation-duration:2.4s}}.clc-lesson-nav{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(241,245,249,.08);border-top:1px solid rgba(241,245,249,.08)}.clc-lesson-nav>*{background:var(--clc-stage)}.clc-lesson-nav-btn{display:flex;align-items:center;gap:10px;padding:12px 16px;min-height:56px;color:#f1f5f9;text-decoration:none;transition:background .15s}.clc-lesson-nav-btn.is-next{justify-content:flex-end}.clc-lesson-nav-btn:focus-visible,.clc-lesson-nav-btn:hover{background:#111!important;outline:none}.clc-lesson-nav-btn:focus-visible{box-shadow:inset 0 0 0 2px var(--green)}.clc-lesson-nav-btn.is-next svg{color:var(--green)}.clc-lesson-nav-k{display:block;font-family:var(--clc-mono);font-size:10px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:rgba(241,245,249,.55)}.clc-lesson-nav-t{display:block;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}@media (max-width:520px){.clc-lesson-nav-t{display:none}.clc-lesson-nav-k{font-size:11px;color:#f1f5f9}}.clc-cert-how summary::-webkit-details-marker{display:none}.clc-cert-how .clc-cert-how-chev{transition:transform .2s}.clc-cert-how[open] .clc-cert-how-chev{transform:rotate(180deg)}.clc-cert-sample{position:absolute;top:7%;inset-inline-end:-9%;z-index:3;transform:rotate(32deg);background:var(--green);color:#050505;font-family:var(--clc-display);font-weight:900;letter-spacing:.3em;text-transform:uppercase;font-size:clamp(9px,1.6cqw,15px);padding:.7em 5em;pointer-events:none}[dir=rtl] .clc-cert-sample{transform:rotate(-32deg)}.clc-cert-tape{position:absolute;z-index:3;top:7.5%;inset-inline-end:-11%;width:44%;transform:rotate(33deg);text-align:center;white-space:nowrap;overflow:hidden;padding:.55em 0;border-block:1px solid #050505;box-shadow:.3cqw .3cqw 0 rgba(5,5,5,.3);pointer-events:none}[dir=rtl] .clc-cert-tape{transform:rotate(-33deg)}.clc-cert-seal{animation:clc-spin 22s linear infinite}.clc-cert-mini{border-radius:10px;box-shadow:none;margin-top:12px}.clc-cert-mini .clc-cert-tape{top:9%;inset-inline-end:-16%;width:56%}@media print{.clc-cert-seal{animation:none}}.clc-teacher-featured{display:grid;grid-template-columns:minmax(0,1fr)}.clc-teacher-featured .clc-teacher-photo:after{display:none}.clc-teacher-featured .clc-teacher-photo{aspect-ratio:4/3}@media (min-width:720px){.clc-teacher-featured{grid-template-columns:minmax(220px,38%) minmax(0,1fr)}.clc-teacher-featured .clc-teacher-photo{aspect-ratio:auto;min-height:100%}}