*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#07100d;--panel:#0b1713;--panel2:#0e1d18;--text:#e8f4ef;--muted:#9ab0a7;--accent:#52f59b;--line:#183128;--danger:#ff6b6b}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
body:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(82,245,155,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(82,245,155,.025) 1px,transparent 1px);background-size:40px 40px}
a{color:inherit;text-decoration:none}.nav{height:72px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 7%;position:sticky;top:0;background:rgba(7,16,13,.88);backdrop-filter:blur(15px);z-index:10}
.logo{font-weight:800;font-size:1.1rem;letter-spacing:-.4px}.logo span{color:var(--accent);font-size:1.5rem;margin-right:7px}
nav{display:flex;gap:28px}nav a{color:var(--muted);font-size:.9rem;font-weight:600}nav a:hover{color:var(--accent)}
.menu{display:none;background:none;border:0;color:var(--text);font-size:1.5rem}
.hero{min-height:calc(100vh - 72px);padding:90px 7%;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:70px}
.eyebrow{font-family:"JetBrains Mono",monospace;color:var(--accent);font-size:.72rem;font-weight:700;letter-spacing:1.6px;margin-bottom:14px}
h1{font-size:clamp(3.2rem,7vw,6.2rem);line-height:.98;letter-spacing:-5px;max-width:850px}h1 span{color:var(--accent)}.hero-text{max-width:650px;color:var(--muted);font-size:1.08rem;margin:25px 0 30px}
.hero-buttons{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-block;padding:12px 20px;border-radius:9px;font-weight:700;font-size:.9rem;border:1px solid var(--line);cursor:pointer}.primary{background:var(--accent);color:#06110c;border-color:var(--accent)}.secondary{background:transparent;color:var(--text)}.btn:hover{transform:translateY(-2px)}
.stats{display:flex;gap:35px;margin-top:55px}.stats div{display:flex;flex-direction:column}.stats strong{font-size:1.5rem}.stats span{font-size:.75rem;color:var(--muted)}
.terminal-card{border:1px solid var(--line);border-radius:15px;background:#050b09;box-shadow:0 20px 70px rgba(0,0,0,.35);overflow:hidden}.terminal-top{height:44px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 16px;gap:7px;color:var(--muted);font-family:"JetBrains Mono";font-size:.65rem}.terminal-top span{width:8px;height:8px;border-radius:50%;background:#31423b}.terminal-top b{margin-left:10px;font-weight:500}.terminal-body{padding:30px;font-family:"JetBrains Mono",monospace;font-size:.78rem;line-height:2.3}.green{color:var(--accent)}.muted{color:#5d756b}.cursor{animation:blink 1s infinite}@keyframes blink{50%{opacity:0}}
.section{padding:105px 7%;max-width:1500px;margin:auto}.section.alt{max-width:none;background:rgba(255,255,255,.018);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-heading{max-width:750px;margin-bottom:45px}.section-heading h2{font-size:clamp(2rem,4vw,3.4rem);letter-spacing:-2px;margin-bottom:12px}.section-heading p:not(.eyebrow){color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.card{padding:26px;border:1px solid var(--line);border-radius:13px;background:rgba(10,23,18,.7);transition:.25s}.card:hover,.concept:hover{border-color:#2a5945;transform:translateY(-3px)}.icon{font-size:1.8rem;margin-bottom:18px}.card h3,.safety-item h3,.concept h3{margin-bottom:8px}.card p,.safety-item p,.concept p{color:var(--muted);font-size:.88rem}.tag{display:inline-block;margin-top:20px;padding:4px 8px;border:1px solid var(--line);border-radius:5px;color:#6e887c;font-size:.6rem;font-family:"JetBrains Mono"}
.safety-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.safety-item{display:flex;gap:20px;padding:28px;border:1px solid var(--line);border-radius:13px;background:rgba(10,23,18,.5)}.safety-item>b{font-family:"JetBrains Mono";color:var(--accent);font-size:1.1rem}
.learn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.concept{padding:27px;border:1px solid var(--line);border-radius:13px;background:rgba(10,23,18,.55);transition:.25s}.concept span{font-family:"JetBrains Mono";display:inline-grid;place-items:center;width:42px;height:42px;border:1px solid #28503e;border-radius:8px;color:var(--accent);margin-bottom:18px}
.lab{background:linear-gradient(180deg,rgba(82,245,155,.035),transparent)}.password-box,.quiz-box{max-width:850px;border:1px solid var(--line);background:var(--panel);padding:30px;border-radius:14px}.input-row{display:flex;gap:8px}.input-row input{flex:1;background:#050b09;border:1px solid var(--line);color:var(--text);padding:14px;border-radius:8px;outline:none}.input-row input:focus{border-color:var(--accent)}.input-row button{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:0 17px;border-radius:8px;cursor:pointer}.meter{height:8px;background:#17231f;border-radius:20px;margin-top:22px;overflow:hidden}.meter div{height:100%;width:0%;background:var(--accent);transition:.3s}.meter-info{display:flex;justify-content:space-between;margin-top:10px;font-size:.8rem}.meter-info span{color:var(--muted)}.tips{padding-left:20px;color:var(--muted);font-size:.82rem;margin-top:20px}
.quiz-box{max-width:900px}.quiz-question{font-size:1.25rem;font-weight:700;margin-bottom:20px}.option{display:block;width:100%;text-align:left;padding:14px;margin:9px 0;border:1px solid var(--line);background:#09130f;color:var(--text);border-radius:8px;cursor:pointer}.option:hover{border-color:#376c53}.option.correct{border-color:var(--accent);background:rgba(82,245,155,.08)}.option.wrong{border-color:var(--danger);background:rgba(255,107,107,.06)}.quiz-footer{display:flex;justify-content:space-between;color:var(--muted);font-size:.75rem;margin:22px 0}.quiz-box .btn:disabled{opacity:.4;cursor:not-allowed}
.cta{text-align:center;padding:120px 7%;border-top:1px solid var(--line)}.cta h2{font-size:clamp(2rem,4vw,3.5rem);letter-spacing:-2px;margin-bottom:12px}.cta p:not(.eyebrow){color:var(--muted);max-width:650px;margin:0 auto 28px}
footer{border-top:1px solid var(--line);padding:25px 7%;display:flex;justify-content:space-between;color:#647b71;font-size:.72rem}
@media(max-width:850px){.nav{padding:0 5%}.menu{display:block}nav{display:none;position:absolute;top:72px;left:0;right:0;background:#07100d;padding:20px 7%;flex-direction:column;gap:16px;border-bottom:1px solid var(--line)}nav.open{display:flex}.hero{grid-template-columns:1fr;padding:70px 5%;gap:50px}.section{padding:75px 5%}.cards,.learn-grid{grid-template-columns:1fr 1fr}.safety-grid{grid-template-columns:1fr}h1{letter-spacing:-3px}}
@media(max-width:560px){.cards,.learn-grid{grid-template-columns:1fr}.stats{gap:20px}.terminal-body{padding:20px;font-size:.68rem}.input-row{flex-direction:column}.input-row button{padding:10px}footer{flex-direction:column;gap:7px}}