/* ── PDF VAULT SHARED STYLES ── */
:root{
  --bg:#070711;--bg2:#0d0d1a;--surface:#111120;--surface2:#161628;--surface3:#1c1c32;
  --border:rgba(255,255,255,0.06);--border2:rgba(255,255,255,0.1);--border3:rgba(255,255,255,0.16);
  --accent:#6366f1;--accent2:#8b5cf6;--accent3:#06b6d4;
  --green:#10b981;--red:#ef4444;--yellow:#f59e0b;--orange:#f97316;
  --text:#f0f0fa;--text2:#b0b0cc;--text3:#7a7a9a;
  --radius:14px;--radius-sm:8px;--radius-lg:20px;
  --font:'Inter',sans-serif;--font2:'Space Grotesk',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;line-height:1.6;}
::-webkit-scrollbar{width:5px;} ::-webkit-scrollbar-track{background:var(--bg);} ::-webkit-scrollbar-thumb{background:var(--surface3);border-radius:3px;}

/* NAV */
.site-nav{position:sticky;top:0;z-index:200;height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 2rem;background:rgba(7,7,17,0.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);}
.nav-logo{font-family:var(--font2);font-weight:700;font-size:1.3rem;text-decoration:none;color:var(--text);display:flex;align-items:center;gap:.5rem;}
.nav-logo-icon{width:30px;height:30px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:.85rem;}
.nav-logo span{color:var(--accent);}
.nav-links{display:flex;align-items:center;gap:.15rem;list-style:none;}
.nav-links a{color:var(--text2);text-decoration:none;font-size:.85rem;font-weight:500;padding:.4rem .75rem;border-radius:var(--radius-sm);transition:all .2s;}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--surface2);}
.nav-mobile-btn{display:none;background:var(--surface2);border:1px solid var(--border2);color:var(--text);padding:.4rem .65rem;border-radius:var(--radius-sm);cursor:pointer;font-size:1rem;}
.mobile-menu{display:none;flex-direction:column;gap:.2rem;background:var(--surface);border-bottom:1px solid var(--border);padding:1rem 1.5rem;}
.mobile-menu a{display:block;padding:.55rem .75rem;color:var(--text2);text-decoration:none;border-radius:var(--radius-sm);font-size:.9rem;transition:all .15s;}
.mobile-menu a:hover{color:var(--text);background:var(--surface2);}
.mobile-menu.open{display:flex;}

/* FOOTER */
footer{border-top:1px solid var(--border);margin-top:4rem;}
.footer-top{max-width:1000px;margin:0 auto;padding:3rem 1.5rem 2rem;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2rem;}
.footer-brand .f-logo{font-family:var(--font2);font-size:1.1rem;font-weight:700;margin-bottom:.5rem;display:flex;align-items:center;gap:.4rem;}
.footer-brand .f-logo span{color:var(--accent);}
.footer-brand p{font-size:.77rem;color:var(--text3);line-height:1.65;}
.footer-col h4{font-family:var(--font2);font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text2);margin-bottom:.8rem;}
.footer-col a{display:block;font-size:.78rem;color:var(--text3);text-decoration:none;margin-bottom:.35rem;transition:color .2s;}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{max-width:1000px;margin:0 auto;padding:1.25rem 1.5rem;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.75rem;}
.footer-bottom p{font-size:.73rem;color:var(--text3);}
.footer-bottom-links{display:flex;gap:1.25rem;}
.footer-bottom-links a{font-size:.73rem;color:var(--text3);text-decoration:none;transition:color .2s;}
.footer-bottom-links a:hover{color:var(--accent);}

/* COMMON PAGE ELEMENTS */
.page-wrap{max-width:780px;margin:0 auto;padding:3rem 1.5rem 5rem;}
.page-wrap-wide{max-width:1000px;margin:0 auto;padding:3rem 1.5rem 5rem;}
.breadcrumb{display:flex;align-items:center;gap:.4rem;font-size:.75rem;color:var(--text3);margin-bottom:1.75rem;flex-wrap:wrap;}
.breadcrumb a{color:var(--text3);text-decoration:none;transition:color .2s;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span{color:var(--text3);}
.tag-pill{display:inline-flex;align-items:center;gap:.4rem;background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.2);color:var(--accent);font-size:.7rem;font-weight:600;padding:.28rem .75rem;border-radius:100px;text-transform:uppercase;letter-spacing:1px;margin-bottom:.75rem;}
.page-title{font-family:var(--font2);font-size:clamp(1.75rem,4vw,2.6rem);font-weight:700;letter-spacing:-.75px;line-height:1.12;margin-bottom:.75rem;}
.page-meta{display:flex;gap:1.25rem;font-size:.75rem;color:var(--text3);margin-bottom:2rem;flex-wrap:wrap;}
.intro-box{font-size:.975rem;color:var(--text2);line-height:1.85;margin-bottom:2.5rem;padding:1.35rem 1.6rem;background:var(--surface);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;}
.article-body{font-size:.9rem;color:var(--text2);line-height:1.9;}
.article-body h2{font-family:var(--font2);font-size:1.25rem;font-weight:700;color:var(--text);margin:2.5rem 0 .75rem;}
.article-body h3{font-family:var(--font2);font-size:1rem;font-weight:700;color:var(--text);margin:1.75rem 0 .5rem;}
.article-body p{margin-bottom:.9rem;}
.article-body strong{color:var(--text);}
.article-body a{color:var(--accent);text-decoration:none;}
.article-body a:hover{text-decoration:underline;}
.step-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1.35rem;margin:1.35rem 0;}
.step-box h3{margin:0 0 .45rem;font-family:var(--font2);font-size:.9rem;font-weight:700;color:var(--text);}
.step-box p{margin:0;font-size:.86rem;color:var(--text2);line-height:1.7;}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:50%;font-size:.7rem;font-weight:700;font-family:var(--font2);margin-right:.45rem;vertical-align:middle;}
.tip-box{background:rgba(245,158,11,.05);border:1px solid rgba(245,158,11,.18);border-radius:var(--radius-sm);padding:1rem 1.25rem;margin:1.4rem 0;font-size:.86rem;color:var(--text2);line-height:1.75;}
.tip-box strong{color:var(--yellow);}
.warn-box{background:rgba(239,68,68,.05);border:1px solid rgba(239,68,68,.18);border-radius:var(--radius-sm);padding:1rem 1.25rem;margin:1.4rem 0;font-size:.86rem;color:var(--text2);line-height:1.75;}
.warn-box strong{color:var(--red);}
.cta-box{background:var(--surface2);border:1px solid var(--border2);border-radius:var(--radius);padding:2rem;text-align:center;margin:2.5rem 0;}
.cta-box h3{font-family:var(--font2);font-size:1.1rem;font-weight:700;margin-bottom:.5rem;}
.cta-box p{font-size:.875rem;color:var(--text2);margin-bottom:1.25rem;}
.cta-btn{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:.75rem 2rem;border-radius:var(--radius);font-family:var(--font2);font-weight:600;font-size:.9rem;text-decoration:none;}
.cta-btn:hover{opacity:.9;}
.table-wrap{overflow-x:auto;margin:1.5rem 0;}
.table-wrap table{width:100%;border-collapse:collapse;font-size:.85rem;}
.table-wrap th{background:var(--surface2);color:var(--text);font-family:var(--font2);font-weight:700;padding:.75rem 1rem;text-align:left;border-bottom:2px solid var(--border2);}
.table-wrap td{padding:.7rem 1rem;color:var(--text2);border-bottom:1px solid var(--border);}
.table-wrap tr:hover td{background:var(--surface);}
.faq-section{margin:2.5rem 0;}
.faq-section h2{font-family:var(--font2);font-size:1.25rem;font-weight:700;color:var(--text);margin-bottom:1rem;}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:.6rem;overflow:hidden;}
.faq-item.open,.faq-item:hover{border-color:var(--border2);}
.faq-q{padding:1rem 1.25rem;font-weight:600;font-size:.875rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s;}
.faq-q:hover,.faq-item.open .faq-q{background:var(--surface);}
.faq-a{padding:0 1.25rem 1rem;font-size:.85rem;color:var(--text2);line-height:1.75;display:none;}
.faq-item.open .faq-a{display:block;}
.faq-icon{transition:transform .25s;color:var(--text3);font-size:.75rem;}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.ad-slot{background:var(--surface);border:1px dashed var(--border2);border-radius:var(--radius-sm);padding:1.5rem;text-align:center;color:var(--text3);font-size:.68rem;text-transform:uppercase;letter-spacing:1.2px;margin:2rem 0;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.85rem;margin:1.5rem 0;}
.related-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-decoration:none;display:flex;align-items:center;gap:.9rem;transition:all .2s;}
.related-card:hover{border-color:var(--accent);transform:translateY(-2px);}
.related-card-icon{font-size:1.5rem;flex-shrink:0;}
.related-card h4{font-family:var(--font2);font-size:.82rem;font-weight:700;color:var(--text);margin-bottom:.2rem;}
.related-card p{font-size:.68rem;color:var(--text3);}
.highlight-box{background:var(--surface);border:1px solid var(--border2);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;padding:1.25rem 1.5rem;margin-bottom:2rem;}
.highlight-box p{color:var(--text);margin:0;font-size:.9rem;line-height:1.75;}

@media(max-width:768px){
  .site-nav{padding:0 1rem;}
  .nav-links{display:none;}
  .nav-mobile-btn{display:block;}
  .footer-top{grid-template-columns:1fr 1fr;}
  .footer-bottom{flex-direction:column;text-align:center;}
}
@media(max-width:480px){
  .footer-top{grid-template-columns:1fr;}
}