*,:before,:after{box-sizing:border-box}html{background:#0a0a1a;min-height:100%}body{color:#fff;background:linear-gradient(#0a0a1a 0%,#0d0d2b 50%,#0a0a1a 100%);min-height:100vh;margin:0;font-family:Space Grotesk,system-ui,sans-serif;overflow-x:hidden}a{color:inherit}button{font:inherit}.bg-canvas{pointer-events:none;z-index:0;width:100%;height:100%;position:fixed;inset:0}#app{z-index:1;min-height:100vh;position:relative}::selection{background:#ff4d0059}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}:root{--accent:#ff4d00;--accent-2:#ffd600;--panel:#ffffff08;--panel-strong:#0000006b;--border:#ffffff12;--muted:#ffffff73;--faint:#ffffff3d;--font-display:"Orbitron"}.topnav{z-index:50;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#0a0a1adb;border-bottom:1px solid #ffffff0f;justify-content:space-between;align-items:center;padding:12px 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0;line-height:1.7}.concepts{flex-wrap:wrap;gap:8px;margin-top:16px;display:flex}.interactive-lab-card{border-color:color-mix(in srgb,var(--accent) 28%,transparent);box-shadow:0 0 34px color-mix(in srgb,var(--accent) 10%,transparent);padding:24px}.sim-header{justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:16px;display:flex}.sim-header h2{font-family:var(--font-display), "Space Grotesk", sans-serif;color:var(--accent);letter-spacing:1px;margin:4px 0;font-size:20px}.sim-header p{color:var(--muted);margin:0;font-size:13px;line-height:1.5}.sim-badge{border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);background:color-mix(in srgb,var(--accent) 13%,transparent);color:var(--accent);letter-spacing:1px;border-radius:999px;padding:6px 10px;font-family:JetBrains Mono,monospace;font-size:10px}.sim-canvas{background:#00000059;border:1px solid #ffffff12;border-radius:12px;width:100%;height:auto;display:block}.control-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:16px;display:grid}.control{color:var(--muted);font-family:JetBrains Mono,monospace;font-size:11px}.control span{margin-bottom:7px;display:block}.control strong{color:var(--accent);font-weight:800}.control input{width:100%;accent-color:var(--accent)}.result-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:16px;display:grid}.result-box{background:#ffffff06;border:1px solid #ffffff0f;border-radius:10px;padding:10px 12px}.result-label{color:var(--faint);letter-spacing:1px;text-transform:uppercase;font-family:JetBrains Mono,monospace;font-size:9px}.result-value{color:var(--accent-2);overflow-wrap:anywhere;margin-top:4px;font-family:JetBrains Mono,monospace;font-size:15px;font-weight:800}.lesson-list{gap:12px;display:grid}.lesson-card-large{grid-template-columns:42px 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10%,transparent)}.legacy-note{color:var(--muted);margin-top:18px;font-size:12px;line-height:1.6}.legacy-note code{color:var(--accent-2)}.footer{color:var(--faint);text-align:center;border-top:1px solid #ffffff0f;margin-top:48px;padding-top:24px;font-family:JetBrains Mono,monospace;font-size:11px}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@media (width<=560px){.topnav{padding:10px 14px}.nav-right{gap:8px}.xp-wrap{display:none}.module-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:1fr 1fr 1fr}.stat-card{padding:12px 8px}.stat-card .value{font-size:15px}.control-grid,.result-grid,.auth-row{flex-direction:column;grid-template-columns:1fr}.interactive-lab-card{padding:18px}.sim-header,.auth-panel{flex-direction:column;align-items:stretch}}