.level2-back-link{color:var(--text-muted);margin-bottom:20px}.level2-list{line-height:1.8}.level2-divider{border:0;border-top:1px solid #333;margin:40px 0}.level2-lab-container{background:#111;border:1px solid #333;border-radius:12px;padding:25px}.level2-lab-title{color:var(--btc-orange);margin-top:0}.level2-lab-intro{color:#ccc;font-size:.9rem}.level2-input-section{margin:20px 0}.level2-input-label{margin-bottom:10px;font-weight:700;display:block}.level2-input-field{color:#fff;background:#2a2a2a;border:none;border-radius:8px;outline:none;width:100%;padding:15px;font-size:1.1rem}.level2-input-field::placeholder{color:#666}.level2-output-section{margin:20px 0}.level2-output-label{margin-bottom:10px;font-weight:700;display:block}.level2-hash-output{color:#00d1b2;word-break:break-all;background:#0a0a0a;border:1px solid #333;border-radius:8px;padding:15px;font-family:monospace}.level2-mission-box{border-left:4px solid var(--btc-orange);background:#f7931a1a;border-radius:8px;padding:15px}.level2-mission-list{color:#ddd;margin:10px 0 0 20px;font-size:.9rem}.level2-section-title{margin-top:40px}