.premium-welcome{margin:24px 0 36px;border:1px solid var(--ac-line);border-radius:18px;background:var(--ac-card);overflow:hidden;scroll-margin-top:100px}.premium-welcome>header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 30px}.premium-welcome h2{margin:12px 0!important;font-size:clamp(27px,3vw,38px)!important;color:var(--ac-ink)}.premium-welcome header p{max-width:640px;color:var(--ac-muted);line-height:1.6;margin:0}.premium-welcome header>a{padding:15px 20px;border:1px solid var(--ac-accent);border-radius:8px;color:var(--ac-ink);white-space:nowrap;font-weight:700}.premium-welcome header>a:hover{background:var(--ac-soft);transform:translateY(-2px)}.premium-welcome-screen{background:#0b1117}.premium-welcome video{display:block;width:100%;aspect-ratio:16/9;max-height:650px;object-fit:contain;background:#0b1117}.premium-welcome-controls{display:flex;align-items:center;gap:18px;padding:18px 24px;border-bottom:1px solid var(--ac-line)}.premium-welcome-controls nav{display:flex;flex:1;gap:7px;flex-wrap:wrap}.premium-welcome-controls button{border:1px solid var(--ac-line);background:transparent;color:var(--ac-ink);padding:10px 12px;border-radius:7px;cursor:pointer;font:600 13px Manrope,sans-serif;min-height:44px}.premium-welcome-controls small{display:block;font:10px 'DM Mono',monospace;color:var(--ac-muted);margin-bottom:5px}.premium-welcome-controls button:hover,.premium-welcome-controls button[aria-current]{background:var(--ac-soft);border-color:var(--ac-accent)}.premium-welcome-controls label{font-size:12px;color:var(--ac-muted)}.premium-welcome-controls select{display:block;margin-top:5px;padding:10px;min-height:44px;background:var(--ac-card);color:var(--ac-ink);border:1px solid var(--ac-line);border-radius:6px;font:14px Manrope,sans-serif}.premium-welcome-transcript{padding:0 24px}.premium-welcome-transcript summary{padding:18px 0;cursor:pointer;color:var(--ac-ink);font-weight:700}.premium-welcome-transcript p{line-height:1.8;color:var(--ac-muted);max-width:90ch}.premium-welcome-transcript b{color:var(--ac-ink)}.premium-welcome-note,.premium-film-error{margin:0;padding:0 24px 22px;font-size:13px;line-height:1.6;color:var(--ac-muted)}.premium-film-error{padding-top:16px;color:var(--ac-ink)}
.academy-deep-dive{border:1px solid var(--ac-line);border-radius:14px;background:var(--ac-soft);padding:26px;margin:28px 0}.academy-deep-dive h3{font-size:25px;line-height:1.3;color:var(--ac-ink);margin:13px 0}.academy-deep-dive>p{font-size:16px;line-height:1.85;color:var(--ac-muted)}.academy-deep-steps{display:grid;gap:10px;margin:22px 0}.academy-deep-steps details{border-top:1px solid var(--ac-line)}.academy-deep-steps summary{padding:17px 0;cursor:pointer;color:var(--ac-ink);font-weight:700;line-height:1.5}.academy-deep-steps details p{margin:0 0 18px;font-size:15px;line-height:1.8;color:var(--ac-muted)}.academy-deep-counter{border-left:3px solid var(--ac-accent);padding:0 0 0 18px!important;margin:24px 0 0!important}.academy-deep-counter b{display:block;color:var(--ac-ink);margin-bottom:7px}.academy-lab{overflow:hidden}.academy-lab-chart svg{display:block;width:100%;height:auto;max-height:340px}.academy-lab-controls{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.academy-lab-controls button{cursor:pointer;min-height:44px;border:1px solid var(--ac-line);color:var(--ac-ink);background:var(--ac-card);padding:10px 14px;border-radius:7px;font:600 13px Manrope,sans-serif}.academy-lab-controls button:hover:not(:disabled){border-color:var(--ac-accent);background:var(--ac-soft)}.academy-lab-controls button:disabled{opacity:.45;cursor:default}.academy-lab-reveal-status{font-size:13px;color:var(--ac-muted);line-height:1.7}.academy-lab-question{color:var(--ac-ink);font-weight:700;line-height:1.7;padding:14px 0;border-bottom:1px solid var(--ac-line)}.academy-lab .lab-axis{fill:var(--ac-muted);font-size:12px}.academy-lab .lab-up{fill:#b1d2c4;stroke:#b1d2c4}.academy-lab .lab-down{fill:#607d8f;stroke:#a8bdca}html[data-theme=light] .academy-lab .lab-up{fill:#2c7060;stroke:#2c7060}html[data-theme=light] .academy-lab .lab-down{fill:#edf0f4;stroke:#50687c}.academy-lab .lab-current{stroke:var(--ac-accent);stroke-dasharray:3 5;opacity:.55}
@media(max-width:760px){.premium-welcome>header{display:block;padding:22px 18px}.premium-welcome header>a{display:inline-block;margin-top:20px;white-space:normal}.premium-welcome-controls{display:block;padding:16px}.premium-welcome-controls nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.premium-welcome-controls button{padding:10px 6px;font-size:11px}.premium-welcome-controls label{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.premium-welcome-controls select{margin:0}.premium-welcome-transcript{padding:0 18px}.premium-welcome-note{padding:0 18px 20px}.academy-deep-dive{padding:20px 17px}.academy-deep-dive h3{font-size:22px}.academy-lab-chart{margin:0 -10px}.academy-lab-controls{gap:6px}.academy-lab-controls button{font-size:12px;padding:10px}.academy-lab-figure{margin-left:0;margin-right:0}}
@media(prefers-reduced-motion:reduce){.premium-welcome *{transition:none!important;transform:none!important}}
.academy-course .academy-lab,.academy-course .academy-lab-figure{background:var(--ac-card);color:var(--ac-ink)}.academy-course .academy-lab>header p,.academy-course .academy-lab-note{color:var(--ac-muted)}.academy-course .lab-grid{stroke:var(--ac-line)}.academy-course .lab-zone{fill:var(--ac-soft);stroke:var(--ac-accent);opacity:.7}.academy-course .academy-lab-legend span{border-color:var(--ac-line)}.academy-course .academy-lab-controls button{background:var(--ac-card);color:var(--ac-ink)}.academy-course .academy-lab-question{color:var(--ac-ink)}.academy-course .academy-lab-tabs button,.academy-course .academy-lab-quiz button{color:var(--ac-ink)}.academy-course .academy-lab-tabs button[aria-pressed=true]{background:var(--ac-accent);color:var(--ac-card)}.academy-course .academy-lab-quiz button[data-result=correct]{background:var(--ac-soft);color:var(--ac-ink)}
.premium-welcome-screen{position:relative}.premium-film-start{position:absolute;left:50%;bottom:16%;transform:translateX(-50%);padding:14px 22px;min-height:48px;max-width:90%;border:1px solid #b1d2c4;border-radius:9px;background:#eff5f1;color:#172c29;font:700 14px Manrope,sans-serif;cursor:pointer;box-shadow:0 8px 30px #0006}.premium-film-start:hover{background:#d9eae1}.premium-film-start:disabled{opacity:.8;cursor:wait}.premium-film-start[hidden]{display:none}@media(prefers-reduced-motion:reduce){.premium-welcome .premium-film-start{transform:translateX(-50%)!important}}