:root{--bg:#0F172A;--bg2:#111827;--card:#1E293B;--card-h:#263548;--border:#334155;--border2:#475569;--text:#F1F5F9;--text2:#94A3B8;--muted:#64748B;--blue:#2563EB;--blue-h:#1D4ED8;--blue-bg:rgba(37,99,235,.12);--green:#22C55E;--green-bg:#064E3B;--red:#EF4444;--red-bg:#7F1D1D;--warn:#F59E0B;--warn-bg:#78350F;--r:12px;--r-sm:8px;--font:'Inter',system-ui,sans-serif}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}
main{flex:1}a{color:var(--blue);text-decoration:none}img{max-width:100%;display:block}
.container{max-width:1100px;margin:0 auto;padding:0 1.25rem}.container-sm{max-width:520px;margin:0 auto;padding:0 1.25rem}
.text-blue{color:var(--blue)}.text-green{color:var(--green)}.text-red{color:var(--red)}.text-muted{color:var(--muted)}

.navbar{position:sticky;top:0;z-index:1000;background:rgba(17,24,39,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 1.25rem;display:flex;align-items:center;justify-content:space-between;height:60px}
.nav-brand{font-size:1.2rem;font-weight:800;color:var(--text);text-decoration:none}
.nav-menu{display:flex;align-items:center;gap:1.25rem}.nav-link{color:var(--text2);font-weight:500;font-size:.9rem}.nav-link:hover{color:var(--text)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:.5rem}.nav-toggle span{display:block;width:22px;height:2px;background:var(--text2);border-radius:2px}
.nav-user-menu{position:relative}.nav-user-btn{display:flex;align-items:center;gap:.5rem;background:var(--card);border:1px solid var(--border);border-radius:100px;padding:.3rem .7rem .3rem .3rem;cursor:pointer;color:var(--text)}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem;color:#fff}.nav-uname{font-weight:600;font-size:.85rem}
.dropdown{position:absolute;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--border);border-radius:var(--r);min-width:200px;box-shadow:0 8px 24px rgba(0,0,0,.4);display:none;overflow:hidden}.dropdown.active{display:block}
.dropdown-head{padding:.75rem 1rem;background:var(--bg2);display:flex;justify-content:space-between;border-bottom:1px solid var(--border);font-size:.85rem}.xp-label{font-weight:700;color:var(--warn)}.lvl-label{color:var(--text2)}
.dd-item{display:block;padding:.6rem 1rem;color:var(--text2);font-size:.88rem}.dd-item:hover{background:var(--card-h);color:var(--text)}.dd-biz{color:var(--blue)}.dd-admin{color:var(--warn)}.dd-out{color:var(--red)}.dd-sep{border-top:1px solid var(--border)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.7rem 1.4rem;border:none;border-radius:var(--r-sm);font-family:var(--font);font-size:.92rem;font-weight:600;cursor:pointer;transition:.15s;text-decoration:none;line-height:1.4}.btn:active{transform:scale(.97)}
.btn-sm{padding:.45rem .9rem;font-size:.82rem}.btn-lg{padding:.9rem 1.8rem;font-size:1.05rem}.btn-xl{padding:1rem 2.2rem;font-size:1.1rem;border-radius:var(--r)}.btn-block{width:100%}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-h);color:#fff}.btn-green{background:var(--green);color:#fff}.btn-green:hover{background:#16A34A;color:#fff}.btn-red{background:var(--red);color:#fff}.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-ghost:hover{background:var(--card);color:var(--text)}.btn-outline{background:transparent;color:var(--blue);border:2px solid var(--blue)}.btn-outline:hover{background:var(--blue);color:#fff}.btn-group{display:flex;gap:.6rem;flex-wrap:wrap}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:1.5rem}.card+.card{margin-top:1rem}.card-title{font-size:1.15rem;font-weight:700;margin-bottom:.75rem}

.form-group{margin-bottom:1.1rem}.form-label{display:block;margin-bottom:.4rem;font-size:.88rem;font-weight:600;color:var(--text2)}
.form-control{width:100%;padding:.65rem .9rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text);font-family:var(--font);font-size:.95rem}.form-control:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-bg)}
textarea.form-control{min-height:100px;resize:vertical}select.form-control{appearance:none;padding-right:2rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .8rem center}
.form-hint{font-size:.78rem;color:var(--muted);margin-top:.3rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}

.alert{padding:.85rem 1.1rem;border-radius:var(--r-sm);margin:1rem 0;font-size:.92rem;display:flex;align-items:center;justify-content:space-between}
.alert-success{background:var(--green-bg);color:#6EE7B7;border:1px solid #065F46}.alert-error{background:var(--red-bg);color:#FCA5A5;border:1px solid #991B1B}.alert-warning{background:var(--warn-bg);color:#FCD34D;border:1px solid #92400E}.alert-info{background:var(--blue-bg);color:#93C5FD;border:1px solid #1E40AF}
.alert-x{background:none;border:none;color:inherit;font-size:1.2rem;cursor:pointer;opacity:.7}

.progress{height:8px;background:var(--bg2);border-radius:100px;overflow:hidden}.progress-fill{height:100%;border-radius:100px;transition:width .4s}.pf-blue{background:var(--blue)}.pf-green{background:var(--green)}.pf-warn{background:var(--warn)}

.badge{display:inline-flex;align-items:center;gap:.3rem;padding:.2rem .6rem;border-radius:100px;font-size:.78rem;font-weight:600}
.badge-blue{background:var(--blue-bg);color:var(--blue)}.badge-green{background:rgba(34,197,94,.15);color:var(--green)}.badge-red{background:rgba(239,68,68,.15);color:var(--red)}.badge-warn{background:rgba(245,158,11,.15);color:var(--warn)}.badge-gray{background:rgba(148,163,184,.12);color:var(--text2)}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:.75rem}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:1.25rem;text-align:center}.stat-icon{font-size:1.75rem;margin-bottom:.4rem}.stat-val{font-size:1.75rem;font-weight:800;line-height:1.2}.stat-label{font-size:.8rem;color:var(--muted);margin-top:.2rem}

.hero{padding:4.5rem 0 3.5rem;background:radial-gradient(ellipse at 30% 0%,rgba(37,99,235,.12) 0%,transparent 60%)}
.hero-inner{max-width:720px;margin:0 auto;text-align:center;padding:0 1.25rem}
.hero-badge{display:inline-flex;align-items:center;gap:.4rem;background:var(--blue-bg);color:var(--blue);padding:.4rem .9rem;border-radius:100px;font-size:.82rem;font-weight:600;margin-bottom:1.2rem}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:900;line-height:1.12;margin-bottom:1rem;background:linear-gradient(135deg,var(--text),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--text2);max-width:540px;margin:0 auto 2rem}.hero-cta{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;justify-content:center;gap:2.5rem;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}.hs-val{font-size:1.5rem;font-weight:800}.hs-lbl{font-size:.8rem;color:var(--muted)}

.section{padding:4rem 0}.section-alt{background:var(--bg2)}.section-head{text-align:center;max-width:600px;margin:0 auto 2.5rem}.section-head h2{font-size:1.75rem;font-weight:800;margin-bottom:.5rem}.section-head p{color:var(--text2)}.section-label{font-size:.82rem;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.04em;margin-bottom:.4rem;display:inline-block}

.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.25rem}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:1.5rem;transition:.2s}.feature-card:hover{border-color:var(--blue);transform:translateY(-3px)}.feature-icon{font-size:2rem;margin-bottom:.75rem}.feature-card h3{font-size:1.05rem;font-weight:700;margin-bottom:.35rem}.feature-card p{color:var(--text2);font-size:.9rem}

.quiz-wrap{max-width:720px;margin:0 auto}.quiz-prog-text{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);margin-bottom:.4rem}
.quiz-q{font-size:1.25rem;font-weight:700;margin-bottom:1.25rem;line-height:1.35;text-align:center}
.quiz-ctx{color:var(--text2);font-size:.9rem;padding:.8rem;background:var(--bg2);border-radius:var(--r-sm);margin-bottom:1.25rem}
.quiz-img{border-radius:var(--r);border:2px solid var(--border);margin-bottom:1.5rem}
.quiz-opts{display:flex;flex-direction:column;gap:.6rem}
.quiz-opt{display:flex;align-items:center;gap:.85rem;width:100%;text-align:left;padding:.85rem 1.1rem;background:var(--bg2);border:2px solid var(--border);border-radius:var(--r);color:var(--text);font-family:var(--font);font-size:.95rem;cursor:pointer;transition:.15s}
.quiz-opt:hover{border-color:var(--blue);background:var(--blue-bg)}.quiz-opt.correct{border-color:var(--green);background:var(--green-bg)}.quiz-opt.wrong{border-color:var(--red);background:var(--red-bg)}
.quiz-dot{width:22px;height:22px;border-radius:50%;border:2px solid var(--border2);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.75rem}
.quiz-opt.correct .quiz-dot{border-color:var(--green);background:var(--green)}.quiz-opt.wrong .quiz-dot{border-color:var(--red);background:var(--red)}
.quiz-explain{margin-top:1.25rem;padding:1rem;background:var(--bg2);border-radius:var(--r);border-left:4px solid var(--blue);text-align:left}.quiz-explain h4{color:var(--blue);margin-bottom:.35rem;font-size:.9rem}.quiz-explain p{color:var(--text2);font-size:.9rem;line-height:1.6}
.quiz-xp{display:inline-flex;align-items:center;gap:.4rem;background:rgba(245,158,11,.12);color:var(--warn);padding:.4rem .8rem;border-radius:100px;font-weight:700;margin-top:1rem}
.quiz-score{font-size:3.5rem;font-weight:900;background:linear-gradient(135deg,var(--blue),var(--green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}
.cat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:1.5rem;text-decoration:none;transition:.2s;display:block}.cat-card:hover{border-color:var(--blue);transform:translateY(-2px)}.cat-icon{font-size:2.25rem;margin-bottom:.75rem}.cat-card h3{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:.25rem}.cat-card p{font-size:.82rem;color:var(--muted)}

.tbl-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--border)}table{width:100%;border-collapse:collapse}th,td{padding:.7rem .85rem;text-align:left}
th{background:var(--bg2);color:var(--muted);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--border)}td{border-bottom:1px solid var(--border);font-size:.9rem}tr:last-child td{border-bottom:none}tr:hover td{background:var(--card-h)}

.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 180px);padding:2rem 1.25rem}.auth-card{width:100%;max-width:420px}
.auth-card h1{font-size:1.5rem;font-weight:800;text-align:center;margin-bottom:.4rem}.auth-sub{text-align:center;color:var(--muted);margin-bottom:1.5rem;font-size:.9rem}
.auth-link{text-align:center;margin-top:1rem;color:var(--muted);font-size:.88rem}.auth-link a{color:var(--blue);font-weight:600}

.dash-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:.75rem}.dash-head h1{font-size:1.5rem;font-weight:800}
.level-bar{display:flex;align-items:center;gap:.85rem;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:.85rem 1.25rem}

.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:.75rem}
.badge-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:1rem;text-align:center}.badge-card.earned{border-color:var(--warn)}.badge-card.locked{opacity:.35;filter:grayscale(1)}.badge-big{font-size:2rem;margin-bottom:.35rem}.badge-name{font-size:.82rem;font-weight:600}

.faq-list{max-width:700px;margin:0 auto}.faq-item{border-bottom:1px solid var(--border)}.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;padding:1rem 0;background:none;border:none;color:var(--text);font-family:var(--font);font-size:1rem;font-weight:600;text-align:left;cursor:pointer}.faq-q::after{content:'+';font-size:1.4rem;color:var(--muted)}.faq-item.active .faq-q::after{content:'−';color:var(--blue)}.faq-a{max-height:0;overflow:hidden;transition:max-height .3s}.faq-item.active .faq-a{max-height:400px}.faq-a p{color:var(--text2);padding-bottom:1rem;line-height:1.7}

.footer{border-top:1px solid var(--border);padding:3rem 0 1.5rem;margin-top:3rem}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2rem}.footer-brand{font-size:1.1rem;font-weight:800;margin-bottom:.5rem}.footer-desc{color:var(--muted);font-size:.85rem;line-height:1.6}.footer h4{font-size:.85rem;font-weight:700;margin-bottom:.6rem;color:var(--text2)}.footer a{display:block;color:var(--muted);font-size:.85rem;margin-bottom:.35rem}.footer a:hover{color:var(--text)}.footer-bottom{text-align:center;padding-top:1.5rem;border-top:1px solid var(--border);font-size:.8rem;color:var(--muted)}

.admin-layout{display:grid;grid-template-columns:240px 1fr;min-height:calc(100vh - 60px)}.admin-side{background:var(--bg2);border-right:1px solid var(--border);padding:1.25rem 0}
.admin-nav{display:block;padding:.6rem 1.25rem;color:var(--text2);font-size:.88rem;font-weight:500;text-decoration:none}.admin-nav:hover,.admin-nav.active{color:var(--text);background:var(--card)}.admin-nav.active{border-right:3px solid var(--blue)}
.admin-body{padding:1.5rem}.admin-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:.75rem}.admin-head h1{font-size:1.35rem;font-weight:800}

.pag{display:flex;justify-content:center;gap:.4rem;margin-top:1.5rem}.pag a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--r-sm);background:var(--card);border:1px solid var(--border);color:var(--text2);font-weight:600;font-size:.85rem;text-decoration:none}.pag a:hover{background:var(--card-h)}.pag a.active{background:var(--blue);color:#fff;border-color:var(--blue)}

.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem}
.pricing-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:2rem;text-align:center;position:relative}.pricing-card.featured{border-color:var(--blue);box-shadow:0 0 30px rgba(37,99,235,.15)}
.pricing-price{font-size:2.25rem;font-weight:900;margin:.5rem 0}.pricing-price span{font-size:.9rem;color:var(--muted);font-weight:400}
.pricing-features{list-style:none;text-align:left;margin:1.5rem 0}.pricing-features li{padding:.4rem 0;font-size:.9rem;color:var(--text2)}.pricing-features li::before{content:'✅ ';margin-right:.3rem}

.cookie-bar{position:fixed;bottom:0;left:0;right:0;z-index:9999;background:var(--card);border-top:1px solid var(--border);padding:1rem;display:none}.cookie-bar.active{display:block}
.cookie-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.cookie-txt{color:var(--text2);font-size:.88rem;flex:1}

@media(max-width:768px){.nav-toggle{display:flex}.nav-menu{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);flex-direction:column;padding:1rem 1.25rem;gap:.5rem}.nav-menu.active{display:flex}.hero{padding:3rem 0 2rem}.hero-stats{flex-direction:column;gap:1rem;align-items:center}.section{padding:2.5rem 0}.form-row{grid-template-columns:1fr}.admin-layout{grid-template-columns:1fr}.admin-side{display:none}.footer-grid{grid-template-columns:1fr 1fr;gap:1.5rem}.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.stats-grid{grid-template-columns:1fr}.hero-cta{flex-direction:column}.hero-cta .btn{width:100%}.pricing-grid{grid-template-columns:1fr}}