:root{
  --bg:#060e0c;--panel:#0d1a16;--panel2:#111f1a;--line:rgba(255,255,255,.09);
  --ink:#e8f5f0;--dim:#5a7a6e;--accent:#2ee6c0;
  --off:#34d36b;--def:#ff4d4d;--tra:#ff9f1a;--cpa:#3b9dff;
  --num:'Teko',sans-serif;--font:'Chakra Petch',monospace;
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.6;overflow-x:hidden}

/* ── NAV ── */
nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 24px;height:56px;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(6,14,12,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:32px;width:auto}
.nav-lang-wrap{position:relative}
#lang-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;border-radius:9px;
  background:var(--panel);border:1px solid var(--line);color:var(--ink);
  font-size:11px;font-weight:700;letter-spacing:.08em;cursor:pointer;transition:border-color .15s;
  font-family:var(--font)}
#lang-btn:hover,#lang-btn:active{border-color:var(--accent)}
#lang-dd{position:absolute;top:calc(100% + 8px);right:0;z-index:200;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:8px;display:none;box-shadow:0 8px 32px -8px rgba(0,0,0,.6);min-width:160px}
#lang-dd.open{display:block}
.lang-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.lgbtn{display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;padding:8px 10px;border-radius:8px;border:1px solid var(--line);
  background:var(--panel2);cursor:pointer;transition:border-color .15s}
.lgbtn.on{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.lgbtn:active{border-color:var(--accent)}
.lf{width:36px;height:24px;border-radius:3px;object-fit:cover;display:block}
.lf-sm{width:22px;height:15px;border-radius:2px;object-fit:cover;display:block}
.lc{font-size:10px;font-weight:700;letter-spacing:.08em;color:var(--dim)}
.lgbtn.on .lc{color:var(--accent)}
.nav-cta{font-family:var(--font);font-size:12px;font-weight:600;letter-spacing:.08em;
  padding:8px 18px;border-radius:8px;background:var(--accent);color:#04130f;
  text-decoration:none;transition:opacity .15s}
.nav-cta:hover{opacity:.85}

/* ── HERO ── */
#hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:80px 24px 60px;text-align:center;position:relative;overflow:hidden}
.hero-glow{position:absolute;width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,230,192,.12) 0%,transparent 70%);
  top:50%;left:50%;transform:translate(-50%,-55%);pointer-events:none}
.hero-tag{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);
  font-weight:600;margin-bottom:20px;opacity:.8}
.hero-title{font-family:var(--num);font-size:clamp(52px,12vw,96px);font-weight:700;line-height:.9;
  letter-spacing:.01em;margin-bottom:24px}
.hero-title em{color:var(--accent);font-style:normal}
.hero-sub{font-size:clamp(14px,2.5vw,18px);color:var(--dim);max-width:520px;margin:0 auto 36px;line-height:1.7}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-primary{font-family:var(--font);font-size:13px;font-weight:700;letter-spacing:.08em;
  padding:14px 28px;border-radius:10px;background:var(--accent);color:#04130f;
  text-decoration:none;transition:opacity .15s;display:inline-block}
.btn-primary:hover{opacity:.85}
.btn-secondary{font-family:var(--font);font-size:13px;font-weight:600;letter-spacing:.08em;
  padding:14px 28px;border-radius:10px;background:transparent;color:var(--ink);
  border:1px solid var(--line);text-decoration:none;transition:all .15s;display:inline-block}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.hero-note{margin-top:20px;font-size:11px;color:var(--dim);letter-spacing:.06em}

/* ── LEVELS ── */
#levels{padding:80px 24px;max-width:900px;margin:0 auto}
.section-label{font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);
  font-weight:600;margin-bottom:12px}
.section-title{font-family:var(--num);font-size:clamp(32px,6vw,52px);font-weight:700;margin-bottom:16px;line-height:1}
.section-sub{color:var(--dim);max-width:520px;margin-bottom:48px;font-size:14px;line-height:1.7}
.level-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.level-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;position:relative;overflow:hidden}
.level-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px}
.level-card.grassroots::before{background:var(--off)}
.level-card.semi::before{background:var(--tra)}
.level-card.pro::before{background:var(--cpa)}
.level-icon{font-family:var(--num);font-size:40px;font-weight:700;margin-bottom:8px;line-height:1}
.level-card.grassroots .level-icon{color:var(--off)}
.level-card.semi .level-icon{color:var(--tra)}
.level-card.pro .level-icon{color:var(--cpa)}
.level-name{font-family:var(--num);font-size:20px;font-weight:700;margin-bottom:8px}
.level-desc{font-size:13px;color:var(--dim);line-height:1.6}

/* ── HOW IT WORKS ── */
#how{padding:80px 24px;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.how-inner{max-width:900px;margin:0 auto}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;margin-top:48px}
.step{padding:24px;background:var(--panel2);border-radius:var(--radius);border:1px solid var(--line)}
.step-num{font-family:var(--num);font-size:48px;font-weight:700;color:var(--accent);opacity:.25;line-height:1;margin-bottom:12px}
.step-title{font-family:var(--num);font-size:18px;font-weight:600;margin-bottom:8px}
.step-desc{font-size:13px;color:var(--dim);line-height:1.6}

/* ── FEATURES ── */
#features{padding:80px 24px;max-width:900px;margin:0 auto}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:48px}
.feat{padding:22px;border:1px solid var(--line);border-radius:var(--radius)}
.feat-icon{width:36px;height:36px;border-radius:9px;background:rgba(46,230,192,.1);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.feat-title{font-family:var(--num);font-size:17px;font-weight:600;margin-bottom:6px}
.feat-desc{font-size:13px;color:var(--dim);line-height:1.6}

/* ── CODE DEMO ── */
#demo{padding:80px 24px;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.demo-inner{max-width:900px;margin:0 auto}
.demo-codes{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px;justify-content:center}
.demo-code{padding:12px 20px;border-radius:10px;border:2px solid;display:flex;flex-direction:column;align-items:center;gap:4px;cursor:default}
.demo-code .dc-label{font-family:var(--num);font-size:42px;font-weight:700;line-height:1}
.demo-code .dc-name{font-size:10px;letter-spacing:.12em;text-transform:uppercase;opacity:.6;font-weight:600}
.demo-code.def{border-color:rgba(255,77,77,.4);background:rgba(255,77,77,.06)}
.demo-code.def .dc-label{color:var(--def)}
.demo-code.off{border-color:rgba(52,211,107,.4);background:rgba(52,211,107,.06)}
.demo-code.off .dc-label{color:var(--off)}
.demo-code.tra{border-color:rgba(255,159,26,.4);background:rgba(255,159,26,.06)}
.demo-code.tra .dc-label{color:var(--tra)}
.demo-code.cpa{border-color:rgba(59,157,255,.4);background:rgba(59,157,255,.06)}
.demo-code.cpa .dc-label{color:var(--cpa)}

/* ── SCIENCE ── */
#science{padding:80px 24px;max-width:900px;margin:0 auto}
.science-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:48px}
.sci-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.sci-num{font-family:var(--num);font-size:36px;font-weight:700;color:var(--accent);margin-bottom:6px}
.sci-title{font-size:13px;font-weight:600;margin-bottom:6px}
.sci-desc{font-size:12px;color:var(--dim);line-height:1.6}

/* ── QUOTE ── */
#quote{padding:80px 24px;text-align:center;background:var(--panel);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
blockquote{max-width:660px;margin:0 auto;font-family:var(--num);
  font-size:clamp(20px,4vw,30px);font-weight:400;line-height:1.35;color:var(--ink)}
blockquote span{color:var(--accent)}
cite{display:block;margin-top:20px;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--dim);font-style:normal}

/* ── CTA ── */
#cta{padding:100px 24px;text-align:center}
.cta-inner{max-width:560px;margin:0 auto}
.cta-title{font-family:var(--num);font-size:clamp(36px,8vw,64px);font-weight:700;line-height:.95;margin-bottom:20px}
.cta-sub{color:var(--dim);margin-bottom:36px;font-size:14px;line-height:1.7}

/* ── FOOTER ── */
footer{padding:24px;border-top:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;flex-wrap:wrap;gap:12px}
.foot-brand{font-family:var(--num);font-size:16px;font-weight:700;color:var(--dim)}
.foot-note{font-size:11px;color:var(--dim);letter-spacing:.06em}

/* ── I18N ── */
[data-i18n]{transition:opacity .15s}