:root{
  --bg:#080b09;
  --panel:#111713;
  --panel2:#182019;
  --lime:#b9ff00;
  --lime2:#8ad000;
  --text:#f7f8f5;
  --muted:#b8beb8;
  --dim:#747d76;
  --line:#2d372f;
  --danger:#ff675d;
  --ok:#b9ff00;
  --shadow:0 24px 80px rgba(0,0,0,.34);
  --radius:18px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.5}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block}
.wrap{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.topbar{position:sticky;top:0;z-index:20;background:rgba(8,11,9,.88);backdrop-filter:blur(16px);border-bottom:1px solid rgba(185,255,0,.11)}
.nav{height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand img{width:42px;height:42px}
.brand-lockup{display:flex;flex-direction:column;line-height:1}
.brand-lockup strong{font-size:14px;letter-spacing:.08em}
.brand-lockup span{font-size:12px;color:var(--lime);font-weight:800;letter-spacing:.17em;margin-top:6px}
.nav-actions{display:flex;align-items:center;gap:10px}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:8px 12px;border-radius:999px;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.04em;background:rgba(255,255,255,.02)}
.pill.lime{border-color:rgba(185,255,0,.35);color:var(--lime);background:rgba(185,255,0,.06)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 17px;font-weight:900;letter-spacing:.02em;transition:.18s transform,.18s background,.18s border-color;min-height:46px}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--lime);color:#091007}
.btn-primary:hover{background:#c9ff39}
.btn-secondary{background:#161d18;color:var(--text);border:1px solid var(--line)}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.hero{min-height:690px;position:relative;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--line);background:#080b09}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(5,8,6,.96) 0%,rgba(5,8,6,.86) 45%,rgba(5,8,6,.42) 74%,rgba(5,8,6,.62) 100%),url('images/hero.jpg');background-size:cover;background-position:center}
.hero::after{content:"";position:absolute;left:0;top:0;bottom:0;width:10px;background:var(--lime);opacity:.75}
.hero-inner{position:relative;z-index:2;padding:90px 0 96px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);gap:70px;align-items:center}
.kicker{color:var(--lime);font-size:12px;font-weight:900;letter-spacing:.18em;text-transform:uppercase;margin:0 0 16px}
h1,h2,h3{margin:0;line-height:.96;text-transform:uppercase;letter-spacing:-.025em}
h1{font-size:clamp(50px,7vw,92px);max-width:820px}
h1 .accent,h2 .accent{color:var(--lime)}
.lede{font-size:clamp(17px,2vw,21px);color:#dde3dd;max-width:720px;margin:24px 0 0}
.hero-seq{margin-top:34px;display:flex;flex-wrap:wrap;gap:8px;color:var(--lime);font-size:12px;font-weight:900;letter-spacing:.08em}
.hero-seq span{padding:8px 10px;border:1px solid rgba(185,255,0,.2);background:rgba(185,255,0,.04);border-radius:8px}
.login-card{background:rgba(12,17,13,.9);border:1px solid rgba(185,255,0,.23);border-radius:24px;box-shadow:var(--shadow);padding:26px;position:relative;overflow:hidden}
.login-card::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--lime)}
.login-card h3{font-size:26px;margin-top:4px}
.login-card .sub{color:var(--muted);font-size:14px;margin:12px 0 20px}
.form-row{display:grid;gap:7px;margin:13px 0}
label{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#dce2dc}
input{width:100%;background:#080b09;border:1px solid var(--line);color:var(--text);padding:13px 14px;border-radius:10px;outline:none}
input:focus{border-color:var(--lime);box-shadow:0 0 0 3px rgba(185,255,0,.08)}
.help{font-size:12px;color:var(--dim);margin-top:12px}
.demo-creds{margin-top:18px;background:#0a0f0b;border:1px dashed rgba(185,255,0,.28);border-radius:12px;padding:12px 14px;color:var(--muted);font-size:12px}
.demo-creds strong{color:var(--lime)}
.error{display:none;background:rgba(255,103,93,.08);border:1px solid rgba(255,103,93,.35);color:#ffb6b1;padding:10px 12px;border-radius:10px;margin-top:12px;font-size:13px}
.section{padding:86px 0}
.section.alt{background:#0d120e;border-top:1px solid #151d17;border-bottom:1px solid #151d17}
.section h2{font-size:clamp(36px,5vw,62px);max-width:820px}
.section-intro{color:var(--muted);font-size:17px;max-width:760px;margin:20px 0 0}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:38px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:190px}
.card .num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:rgba(185,255,0,.09);border:1px solid rgba(185,255,0,.24);color:var(--lime);font-weight:900;margin-bottom:22px}
.card h3{font-size:21px;line-height:1.05}
.card p{color:var(--muted);margin:12px 0 0;font-size:14px}
.flow{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:36px}
.flow div{border:1px solid var(--line);background:#101612;padding:14px 9px;text-align:center;border-radius:10px;font-size:11px;font-weight:900;color:#dce3dc;min-height:62px;display:grid;place-items:center}
.flow div:nth-child(odd){border-color:rgba(185,255,0,.25)}
.site-footer{padding:35px 0 50px;border-top:1px solid var(--line);color:var(--dim);font-size:12px}
.footer-row{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
.footer-link{color:#9fa79f}.footer-link:hover{color:var(--lime)}

/* App shell */
.app-body{min-height:100vh;background:radial-gradient(circle at 90% 10%,rgba(185,255,0,.05),transparent 30%),var(--bg)}
.app-header{border-bottom:1px solid var(--line);background:#0b0f0c}
.app-nav{height:72px;display:flex;align-items:center;justify-content:space-between}
.user-chip{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:10px}
.user-dot{width:9px;height:9px;background:var(--lime);border-radius:50%;box-shadow:0 0 0 4px rgba(185,255,0,.08)}
.app-main{padding:48px 0 80px}
.app-hero{display:grid;grid-template-columns:1.45fr .55fr;gap:24px;align-items:stretch}
.app-hero .intro{background:linear-gradient(125deg,#111713,#0c110d);border:1px solid var(--line);border-radius:22px;padding:32px}
.app-hero h1{font-size:clamp(38px,5vw,64px)}
.app-hero p{max-width:700px;color:var(--muted)}
.stat-stack{display:grid;gap:12px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:19px}
.stat .label{color:var(--dim);font-size:11px;text-transform:uppercase;letter-spacing:.11em;font-weight:800}
.stat .value{font-size:29px;font-weight:900;margin-top:3px}
.modules{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.module{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:18px;min-height:228px;position:relative;overflow:hidden}
.module.active{border-color:rgba(185,255,0,.34);background:linear-gradient(155deg,#131b14,#0f1510)}
.module.locked{opacity:.62}
.module-num{font-size:11px;color:var(--lime);font-weight:900;letter-spacing:.14em}
.module h3{font-size:24px}
.module p{color:var(--muted);font-size:13px;margin:0;flex:1}
.status{font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:var(--dim)}
.status.complete{color:var(--lime)}
.progress{height:8px;border-radius:999px;background:#090d0a;border:1px solid var(--line);overflow:hidden}
.progress span{display:block;height:100%;background:var(--lime);width:0}

/* lesson */
.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--dim);font-size:12px;margin-bottom:24px}
.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px}
.lesson-main{min-width:0}
.lesson-title{font-size:clamp(42px,6vw,72px);margin-bottom:16px}
.lesson-lede{color:var(--muted);font-size:18px;max-width:780px}
.notice{margin:25px 0;border:1px solid rgba(185,255,0,.26);background:rgba(185,255,0,.055);border-radius:14px;padding:16px;color:#e6ebE6}
.content-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px;margin-top:18px}
.content-card h3{font-size:23px;margin-bottom:12px}
.content-card p,.content-card li{color:var(--muted)}
.checklist{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:9px}
.checklist li{display:flex;gap:10px;align-items:flex-start}
.checklist li::before{content:"✓";color:var(--lime);font-weight:900;margin-top:1px}
.lesson-side{position:sticky;top:96px;align-self:start}
.side-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px;margin-bottom:14px}
.side-card .smallcap{color:var(--lime);font-size:10px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.side-card h3{font-size:18px;margin-top:8px}
.side-card p{font-size:12px;color:var(--muted)}

/* quiz */
.quiz-wrap{max-width:860px}
.quiz-question{background:var(--panel);border:1px solid var(--line);border-radius:17px;padding:22px;margin:16px 0}
.quiz-question h3{font-size:18px;line-height:1.25;text-transform:none;letter-spacing:0}
.options{display:grid;gap:9px;margin-top:14px}
.option{display:flex;gap:10px;align-items:flex-start;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#0b100c;cursor:pointer}
.option:hover{border-color:#455148}
.option input{width:auto;margin-top:3px}
.quiz-result{display:none;margin-top:22px;border-radius:18px;padding:24px;border:1px solid rgba(185,255,0,.31);background:linear-gradient(135deg,rgba(185,255,0,.08),rgba(185,255,0,.025))}
.score{font-size:54px;line-height:1;font-weight:950;color:var(--lime)}

/* admin */
.admin-banner{border:1px solid rgba(185,255,0,.26);background:rgba(185,255,0,.05);padding:12px 14px;border-radius:12px;color:var(--muted);font-size:12px;margin-bottom:22px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:16px;background:var(--panel)}
table{border-collapse:collapse;width:100%;min-width:780px}
th,td{text-align:left;padding:15px 14px;border-bottom:1px solid var(--line);font-size:13px}
th{font-size:10px;color:var(--dim);text-transform:uppercase;letter-spacing:.1em;background:#0d120e}
td{color:#dce2dc}
.badge{display:inline-block;padding:5px 8px;border-radius:999px;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.06em;border:1px solid var(--line);color:var(--muted)}
.badge.good{color:var(--lime);border-color:rgba(185,255,0,.25);background:rgba(185,255,0,.05)}
.admin-actions{display:flex;gap:10px;margin:20px 0;flex-wrap:wrap}

@media(max-width:900px){
  .hero-inner,.app-hero,.lesson-grid{grid-template-columns:1fr}
  .login-card{max-width:560px}
  .grid3,.modules{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .lesson-side{position:static}
}
@media(max-width:620px){
  .wrap{width:min(100% - 24px,var(--max))}
  .nav{height:64px}.brand img{width:36px;height:36px}.brand-lockup strong{font-size:12px}.brand-lockup span{font-size:10px}
  .nav-actions .pill{display:none}
  .hero{min-height:auto}.hero-inner{padding:58px 0 66px;gap:34px}.hero::before{background-position:68% center}
  h1{font-size:50px}.section{padding:62px 0}.section h2{font-size:42px}
  .grid3,.modules{grid-template-columns:1fr}
  .app-main{padding-top:28px}.app-hero .intro{padding:24px}
  .lesson-title{font-size:45px}.content-card{padding:20px}
  .footer-row{align-items:flex-start;flex-direction:column}
}