:root{--bg-deep:#050b08;--bg-panel:#08140d;--bg-panel-soft:#07120c;--bg-hover:#0b1810;--emerald:#34d399;--emerald-bright:#6ee7b7;--emerald-deep:#059669;--emerald-muted:#10b9811f;--emerald-border:#34d39947;--emerald-border-soft:#065f4673;--text:#f1f5f9;--text-muted:#94a3b8;--text-dim:#64748b;--danger:#fb7185;--danger-bg:#f43f5e1f;--danger-border:#f43f5e59;--max-width:900px;--radius:16px;--font-sans:"Space Grotesk", "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, monospace}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--bg-deep);color:var(--text);-webkit-font-smoothing:antialiased;background-image:radial-gradient(circle at 15% 10%,#10b9812e,#0000 28%),radial-gradient(circle at 85% 0,#22d3ee1a,#0000 24%),linear-gradient(#ffffff09 1px,#0000 1px),linear-gradient(90deg,#ffffff09 1px,#0000 1px);background-size:auto,auto,72px 72px,72px 72px;background-attachment:fixed;min-height:100vh;line-height:1.6;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font-family:inherit}::selection{background:var(--emerald);color:var(--bg-deep)}.navbar{z-index:100;border-bottom:1px solid var(--emerald-border-soft);background:color-mix(in srgb, var(--bg-panel-soft) 72%, transparent);-webkit-backdrop-filter:blur(16px)saturate(140%);padding:1rem 1.5rem;position:sticky;top:0}.nav-content{justify-content:space-between;align-items:center;gap:1rem;max-width:1200px;margin:0 auto;display:flex}.logo-btn{cursor:pointer;color:var(--text);background:0 0;border:none;align-items:center;gap:.75rem;padding:.35rem 0;text-decoration:none;display:flex}.logo-mark{border:1px solid var(--emerald-border);background:var(--emerald-muted);border-radius:.75rem;place-items:center;width:2.25rem;height:2.25rem;display:grid;box-shadow:0 0 28px #34d39929}.logo-mark img{width:1.5rem;height:1.5rem}.logo-wordmark{font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;font-size:.85rem;font-weight:700}.logo-wordmark .accent{color:var(--emerald)}.nav-menu{display:inline-block;position:relative}.hamburger-btn{border:1px solid var(--emerald-border-soft);background:color-mix(in srgb, var(--bg-panel) 70%, transparent);width:2.75rem;height:2.75rem;color:var(--text);cursor:pointer;border-radius:.75rem;place-items:center;padding:0;transition:border-color .18s,background-color .18s,color .18s;display:grid}.hamburger-btn:hover,.nav-menu.open .hamburger-btn{border-color:var(--emerald-border);background:var(--emerald-muted);color:var(--emerald-bright)}.hamburger-icon{flex-direction:column;justify-content:center;gap:5px;width:1.15rem;display:flex}.hamburger-icon span{transform-origin:50%;background:currentColor;border-radius:999px;width:100%;height:2px;transition:transform .28s cubic-bezier(.16,1,.3,1),opacity .2s;display:block}.nav-menu.open .hamburger-icon span:first-child{transform:translateY(7px)rotate(45deg)}.nav-menu.open .hamburger-icon span:nth-child(2){opacity:0}.nav-menu.open .hamburger-icon span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.dropdown-content{opacity:0;visibility:hidden;transform-origin:100% 0;background:color-mix(in srgb, var(--bg-panel) 92%, transparent);-webkit-backdrop-filter:blur(20px)saturate(160%);border:1px solid var(--emerald-border-soft);border-radius:var(--radius);z-index:101;min-width:260px;transition:opacity .28s cubic-bezier(.16,1,.3,1),transform .32s cubic-bezier(.16,1,.3,1),visibility .28s step-end;position:absolute;top:100%;right:0;overflow:hidden;transform:scale(.94)translateY(-8px);box-shadow:0 24px 48px #00000059}.nav-menu.open .dropdown-content{opacity:1;visibility:visible;transition:opacity .28s cubic-bezier(.16,1,.3,1),transform .28s cubic-bezier(.16,1,.3,1),visibility step-start;transform:scale(1)translateY(8px)}.dropdown-content a{color:var(--text);padding:.95rem 1.15rem;font-size:.92rem;font-weight:600;transition:background-color .18s,color .18s;display:block}.dropdown-content a:hover{background:var(--emerald-muted);color:var(--emerald-bright)}.hero{text-align:center;max-width:800px;margin:0 auto;padding:clamp(4rem,12vw,6.5rem) 1.5rem 2.5rem;animation:.7s cubic-bezier(.16,1,.3,1) both rise-in;position:relative}.hero-eyebrow{border:1px solid var(--emerald-border);background:var(--emerald-muted);font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;color:#a7f3d0;border-radius:999px;align-items:center;gap:.5rem;margin-bottom:1.25rem;padding:.4rem .85rem;font-size:.68rem;font-weight:600;display:inline-flex}.hero-eyebrow .dot{background:var(--emerald);border-radius:999px;width:.4rem;height:.4rem;animation:1.8s infinite pulse-dot}.hero h1{letter-spacing:-.05em;margin-bottom:1rem;font-size:clamp(2.6rem,9vw,4.4rem);font-weight:700;line-height:.98}.hero h1 span{color:var(--emerald)}.hero p{max-width:34rem;color:var(--text-muted);margin:0 auto;font-size:clamp(1.05rem,3vw,1.25rem);line-height:1.7}.container{max-width:var(--max-width);flex-direction:column;gap:clamp(1.75rem,5vw,2.75rem);margin:0 auto;padding:clamp(1rem,4vw,2rem);display:flex}.panel{border:1px solid var(--emerald-border-soft);background:color-mix(in srgb, var(--bg-panel) 88%, transparent);-webkit-backdrop-filter:blur(12px);border-radius:1.25rem;padding:clamp(1.35rem,4vw,2.25rem);animation:.65s cubic-bezier(.16,1,.3,1) both rise-in;position:relative;overflow:hidden;box-shadow:0 18px 40px #00000038}.panel:first-child{animation-delay:50ms}.panel:nth-child(2){animation-delay:.1s}.panel:nth-child(3){animation-delay:.15s}.panel:nth-child(4){animation-delay:.2s}.panel:nth-child(5){animation-delay:.25s}.panel:nth-child(6){animation-delay:.3s}.panel:nth-child(7){animation-delay:.35s}.panel:nth-child(8){animation-delay:.4s}.panel:hover{border-color:var(--emerald-border);transition:transform .25s,border-color .25s,box-shadow .25s;transform:translateY(-3px);box-shadow:0 24px 48px #10b98114}.panel:after{content:"";pointer-events:none;background:linear-gradient(105deg,#0000 35%,#34d39914 50%,#0000 65%);position:absolute;inset:0;transform:translate(-120%)}.panel:hover:after{animation:1.1s ease-out forwards sheen}.badge{border:1px solid var(--emerald-border);background:var(--emerald-muted);color:var(--emerald-bright);font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;border-radius:999px;margin-bottom:.9rem;padding:.28rem .75rem;font-size:.72rem;font-weight:700;display:inline-block}.panel h2,.panel h3{letter-spacing:-.03em;margin-bottom:.4rem;font-weight:700}.panel h2{font-size:clamp(1.55rem,4vw,1.9rem)}.panel h3{font-size:clamp(1.25rem,3vw,1.45rem)}.panel>p,.quiz-question{color:var(--text-muted);margin-bottom:1.35rem;font-size:1.02rem}.video-wrapper{border:1px solid var(--emerald-border-soft);background:#03110b;border-radius:12px;height:0;padding-bottom:56.25%;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #34d3990f}.video-wrapper iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.quiz{border-left:4px solid var(--emerald)}.options-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.9rem;margin-bottom:.75rem;display:grid}.option-btn{background:color-mix(in srgb, var(--bg-deep) 70%, transparent);border:1px solid var(--emerald-border-soft);text-align:left;color:var(--text);cursor:pointer;border-radius:12px;padding:1rem 1.1rem;font-size:.95rem;font-weight:600;transition:transform .2s cubic-bezier(.34,1.56,.64,1),background-color .2s,border-color .2s,box-shadow .2s}.option-btn:hover{background:var(--bg-hover);border-color:var(--emerald-border);transform:translateY(-2px);box-shadow:0 8px 18px #10b98114}.option-btn:focus-visible{outline:2px solid var(--emerald);outline-offset:2px}.option-btn.correct{color:#d1fae5;box-shadow:0 0 0 1px #34d39940;border-color:var(--emerald)!important;background:#10b98129!important}.option-btn.incorrect{color:#fecdd3;background:var(--danger-bg)!important;border-color:var(--danger-border)!important}.feedback{text-align:center;min-height:1.6rem;margin-top:1rem;font-size:1.02rem;font-weight:700}.feedback.ok{color:var(--emerald-bright)}.feedback.no{color:var(--danger)}footer{border-top:1px solid var(--emerald-border-soft);background:color-mix(in srgb, var(--bg-panel-soft) 80%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);text-align:center;color:var(--text-dim);margin-top:4rem;padding:2.5rem 1.5rem;font-size:.9rem}footer p{animation:.6s both rise-in}@keyframes rise-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes sheen{to{transform:translate(120%)}}@keyframes pulse-dot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.85)}}@media (width<=640px){.options-grid{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}