:root{--bg:#0b1020;--bg2:#0e1430;--card:#141c3d;--card2:#182144;--line:#26315c;--txt:#eef1fb;--mut:#9aa6c9;--acc:#6366f1;--acc2:#22d3ee;--ok:#34d399;--warn:#fbbf24;--err:#f87171}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--txt);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;line-height:1.6;-webkit-text-size-adjust:100%}img{max-width:100%;height:auto}a{color:var(--acc2)}.container{max-width:1160px;margin:0 auto;padding:0 20px}.skip-link{position:absolute;left:-9999px;top:0;background:var(--acc);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 8px 0}.skip-link:focus{left:0}.site-header{position:sticky;top:0;z-index:50;background:rgb(11 16 32 / .88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid 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b{color:var(--txt);font-variant-numeric:tabular-nums}.gpt-track{position:relative;height:12px;background:#0a0f24;border:1px solid var(--line);border-radius:8px;overflow:hidden}.gpt-track .mid{position:absolute;left:50%;top:0;bottom:0;width:1px;background:#33406f}.gpt-fill{position:absolute;top:0;bottom:0;background:linear-gradient(90deg,var(--acc),var(--acc2));border-radius:8px}.gpt-controls{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.gpt-btn-main{background:linear-gradient(92deg,var(--acc),#4f46e5);border:none;color:#fff;font-weight:700;font-size:15px;padding:13px 26px;border-radius:12px;cursor:pointer;box-shadow:0 8px 22px rgb(99 102 241 / .35);transition:transform .1s}.gpt-btn-main:hover{transform:translateY(-2px)}.gpt-btn-main:disabled{opacity:.45;cursor:not-allowed;transform:none}.gpt-range{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--mut)}.gpt-range 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summary::after{content:"+";font-size:22px;color:var(--acc2);font-weight:400;flex:none}.gpt-faq[open] summary::after{content:"–"}.gpt-faq .a{padding:0 20px 18px;font-size:15.5px;color:#c2cdea}.gpt-note{background:rgb(99 102 241 / .12);border:1px solid rgb(99 102 241 / .4);border-radius:14px;padding:18px 20px;font-size:15px;color:#c2cdea;margin:22px 0}.gpt-note b{color:var(--txt)}.site-footer{border-top:1px solid var(--line);background:#080d1c}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px;padding:46px 0 32px}.f-brand p{color:var(--mut);font-size:14.5px;max-width:300px}.f-col h4{margin:0 0 14px;font-size:13px;text-transform:uppercase;letter-spacing:1.2px;color:var(--mut)}.f-col ul{list-style:none;margin:0;padding:0}.f-col li{margin-bottom:9px}.f-col a{color:#c2cdea;text-decoration:none;font-size:15px}.f-col a:hover{color:var(--acc2)}.footer-bar{border-top:1px solid var(--line);padding:18px 0;color:var(--mut);font-size:14px}.footer-bar .container{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between}.footer-bar a{color:var(--mut);text-decoration:none;margin-left:16px}.footer-bar a:hover{color:var(--acc2)}.page-wrap{padding:44px 0 64px}.page-article{max-width:840px;margin:0 auto;background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:20px;padding:44px 38px}.page-article h1{font-size:clamp(26px,4vw,38px);letter-spacing:-.5px;margin:0 0 18px}.page-content p,.page-content li{font-size:16px;line-height:1.75;color:#c2cdea}.page-content h2,.page-content h3{color:var(--txt)}.page-content a{color:var(--acc2)}.err-wrap{text-align:center;padding:90px 0}.err-wrap h1{font-size:clamp(60px,12vw,120px);margin:0;background:linear-gradient(92deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:#fff0}.err-wrap p{color:var(--mut);font-size:18px;margin:8px 0 26px}@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}@media(max-width:720px){.site-nav{position:absolute;top:100%;left:0;right:0;background:#0b1020;border-bottom:1px solid var(--line);display:none;margin:0}.site-nav.open{display:block}.nav-list{flex-direction:column;padding:10px 20px 18px}.nav-toggle{display:flex}.btn-cta{display:none}.header-inner{gap:12px}.article{padding:30px 20px}.page-article{padding:30px 20px}}@media(max-width:560px){.hero{padding:44px 0 36px}.gpt-card{padding:16px}.gpt-pad{transform:scale(.86);transform-origin:top center;margin-bottom:-34px}.footer-grid{grid-template-columns:1fr}.footer-bar .container{justify-content:center;text-align:center}}