.classroom-main{max-width:1440px;padding:36px var(--gutter) 80px;margin:auto}.classroom-main .breadcrumb{margin-bottom:30px}.classroom-intro{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:34px}.classroom-intro .eyebrow{margin-bottom:12px}.classroom-intro h1{font-size:clamp(30px,3.6vw,46px);margin-bottom:16px}.classroom-subtitle{color:var(--muted);font-size:16px}.course-facts{display:flex;align-items:center;gap:22px;white-space:nowrap;font-size:30px;font-weight:600}.course-facts small{font-size:12px;color:var(--muted);font-weight:400}.course-facts i{height:30px;width:1px;background:var(--line)}.classroom-grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:30px}.screen{position:relative;background:#08090b;border-radius:18px 18px 0 0;overflow:hidden;aspect-ratio:16/10;display:flex;align-items:center;justify-content:center}.screen video{width:100%;height:100%;object-fit:contain;background:#08090b}.player-toolbar{background:#242830;color:#d0d4dc;min-height:52px;padding:10px 16px;border-radius:0 0 18px 18px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:11px}.player-settings{display:flex;gap:14px;flex-shrink:0}.player-settings label{display:flex;gap:7px;align-items:center}.player-settings select{background:#363d48;border:1px solid #596373;color:#f7f8fa;padding:5px;border-radius:6px;font-size:11px}.lesson-info{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:28px 0 24px;border-bottom:1px solid var(--line)}.lesson-info .eyebrow{font-size:11px;margin-bottom:8px}.lesson-info h2{font-size:25px;margin:0 0 10px}.lesson-info p:last-child{font-size:12px;color:var(--muted)}.share{border:1px solid var(--line-strong);background:var(--card);color:var(--ink);border-radius:100px;padding:10px 17px;font-size:12px;white-space:nowrap}.share:hover{background:var(--control)}.watch-note{padding-top:24px}.watch-note>span{font-size:13px;font-weight:600}.watch-note p{font-size:12px;line-height:1.9;color:var(--muted);margin-top:8px}.curriculum{border:1px solid var(--line);border-radius:18px;align-self:start;background:var(--surface);padding:22px 16px}.list-heading{display:flex;align-items:center;justify-content:space-between;margin:0 5px 22px}.list-heading h2{font-size:16px;letter-spacing:0}.list-heading span{font-size:11px;color:var(--muted)}.lesson{display:block;border:1px solid transparent;border-radius:12px;padding:12px;margin-bottom:10px}.lesson.active{background:var(--card);border-color:var(--accent)}.lesson:hover{background:var(--card)}.lesson-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;font-size:10px;color:var(--muted);letter-spacing:1px}.current-marker{color:var(--accent);letter-spacing:0}.lesson img{width:100%;aspect-ratio:16/9;object-fit:contain;background:#111;border-radius:6px;margin:0 0 12px}.lesson h3{font-size:14px;letter-spacing:0;margin:0 0 8px}.lesson-sub{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted)}.lesson-progress{margin-top:12px;height:2px;background:var(--line)}.lesson-progress span{display:block;height:2px;background:var(--accent);width:0}.course-access{border-top:1px solid var(--line);margin:20px 6px 0;padding-top:18px;display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted)}.text-button{background:none;border:0;color:var(--accent);padding:4px;font-size:12px}.resume{display:flex;align-items:center;gap:14px;background:var(--success-bg);color:var(--ink);border-radius:10px;margin-top:12px;padding:12px 16px;font-size:12px;flex-wrap:wrap}.resume>span{flex:1}.resume button:not(.text-button),#retry{background:var(--blue);border:0;color:var(--on-blue);padding:8px 14px;border-radius:100px}.error{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:white;background:#111d;text-align:center;padding:30px;line-height:1.8;gap:15px}.error p{max-width:420px}.copy-fallback{padding:15px 0;display:flex;gap:12px;align-items:center;font-size:12px}.copy-fallback input{flex:1;min-width:0;padding:10px;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--ink)}.unlock-layout{display:grid;grid-template-columns:1fr 410px;gap:80px;align-items:center;max-width:1100px;margin:38px auto 66px;min-height:350px}.unlock-intro h1{font-size:clamp(36px,4.5vw,60px);max-width:540px;margin:14px 0 22px}.unlock-intro>p:last-child{max-width:450px;color:var(--muted);font-size:17px;line-height:1.9}.unlock-card{padding:32px;border:1px solid var(--line);background:var(--card);border-radius:22px}.unlock-card h2{font-size:23px;margin-bottom:12px}.unlock-card>p{font-size:13px;color:var(--muted);margin-bottom:25px}.unlock-card label{display:block;font-size:13px;margin-bottom:9px;color:var(--body-ink)}.password-field{position:relative}.password-field input{width:100%;border:1px solid var(--line-strong);border-radius:12px;background:var(--paper);color:var(--ink);padding:13px 64px 13px 14px;outline-offset:3px;font-size:16px}.password-field button{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:12px;background:none;border:0;color:var(--accent);padding:7px}.unlock-card .button{width:100%;margin-top:6px}.unlock-card .button:disabled{opacity:.6;cursor:wait}#login-error{min-height:24px;margin:10px 0;font-size:12px;color:#c13939}.unlock-note{font-size:11px;color:var(--muted);margin-top:16px;text-align:center}.unlock-intro .eyebrow{color:var(--accent)}input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media(max-width:1050px){.classroom-grid{grid-template-columns:minmax(0,1fr) 240px;gap:22px}.course-facts{display:none}.unlock-layout{gap:36px;grid-template-columns:1fr 360px}.player-settings label{font-size:0}.player-settings select{font-size:11px}}@media(max-width:820px){.classroom-main{padding:26px 22px 56px}.classroom-intro{margin-bottom:26px}.classroom-subtitle{font-size:13px}.classroom-grid{display:flex;flex-direction:column;gap:27px}.curriculum{width:100%;padding:22px 14px 14px}.lesson{display:grid;grid-template-columns:112px 1fr;column-gap:14px}.lesson-top{grid-column:1/-1}.lesson img{grid-row:2/5;width:112px;margin:0}.lesson h3{grid-column:2;align-self:end}.lesson-sub{grid-column:2;line-height:1.5;gap:8px;flex-wrap:wrap}.lesson-progress{grid-column:2;margin-top:8px}.lesson-info h2{font-size:22px}.player-toolbar{padding:10px 12px;font-size:10px}.player-settings{gap:8px}.share{padding:9px 12px;font-size:11px}.unlock-layout{grid-template-columns:1fr;gap:32px;margin:0 auto 12px;max-width:540px}.unlock-intro h1{font-size:36px}.unlock-intro>p:last-child{font-size:15px}.unlock-card{padding:25px}.resume{font-size:11px}.resume>span{flex-basis:100%}}@media(prefers-reduced-motion:reduce){.classroom-main *{scroll-behavior:auto}}

/* Authentication redirects should not retain a snapshot of protected content. */
@view-transition{navigation:none}