/* ============================================
   ONCHAINLONDON.COM — The City, On-Chain
   Palette: #080b14 near-black + #2563eb blue + #d97706 gold
   Fonts: Archivo + DM Serif Display
   ============================================ */
:root {
  --dark:       #080b14;
  --dark-md:    #0e1220;
  --dark-lt:    #141c38;
  --dark-panel: #1c2850;
  --blue:       #2563eb;
  --blue-lt:    #3b82f6;
  --blue-bright:#93c5fd;
  --blue-pale:  rgba(37,99,235,0.08);
  --gold:       #d97706;
  --gold-lt:    #f59e0b;
  --gold-bright:#fbbf24;
  --gold-pale:  rgba(217,119,6,0.08);
  --white:      #f0f6ff;
  --text:       #94a8c8;
  --muted:      #3a4a68;
  --dim:        #1a2438;
  --border:     rgba(37,99,235,0.2);
  --border-g:   rgba(217,119,6,0.15);
  --border-lt:  rgba(255,255,255,0.06);
  --avail:      #4ade80;
  --font-head:  'Archivo', sans-serif;
  --font-serif: 'DM Serif Display', Georgia, serif;
  --max-w:      1240px;
  --radius:     4px;
  --trans:      0.28s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-head);background:var(--dark);color:var(--text);line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit}
.container{max-width:var(--max-w);margin:0 auto;padding:0 2rem}
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(8,11,20,0.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 2rem;height:70px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-family:var(--font-head);font-size:1.15rem;font-weight:800;letter-spacing:-0.01em}
.nl-oc{color:var(--blue-bright)}
.nl-lon{color:var(--gold-bright)}
.nav-links{list-style:none;display:flex;gap:2.5rem;align-items:center}
.nav-links a{font-size:0.75rem;font-weight:600;color:var(--muted);letter-spacing:0.06em;text-transform:uppercase;transition:color var(--trans)}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-cta{background:var(--blue)!important;color:var(--white)!important;padding:0.45rem 1.35rem!important;border-radius:var(--radius)!important;font-weight:700!important}
.nav-cta:hover{background:var(--blue-lt)!important}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.hamburger span{display:block;width:22px;height:2px;background:var(--muted)}
.mobile-menu{display:none;flex-direction:column;background:var(--dark-md);padding:1rem 2rem 1.5rem;border-top:1px solid var(--border)}
.mobile-menu a{color:var(--muted);padding:0.75rem 0;font-size:0.875rem;border-bottom:1px solid var(--border-lt)}
.mobile-menu.open{display:flex}
.btn-blue{display:inline-block;background:var(--blue);color:var(--white);font-size:0.8rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;padding:0.9rem 2.25rem;border-radius:var(--radius);border:1px solid var(--blue);transition:var(--trans)}
.btn-blue:hover{background:var(--blue-lt);transform:translateY(-2px);box-shadow:0 8px 25px rgba(37,99,235,0.4)}
.btn-blue.btn-lg{padding:1.1rem 2.75rem;font-size:0.875rem}
.btn-ghost-b{display:inline-block;background:transparent;color:var(--muted);font-size:0.8rem;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;padding:0.9rem 2rem;border-radius:var(--radius);border:1px solid var(--border-lt);transition:var(--trans)}
.btn-ghost-b:hover{border-color:var(--gold);color:var(--gold-bright)}
.btn-text-b{display:inline-flex;align-items:center;gap:0.4rem;font-size:0.825rem;font-weight:600;color:var(--gold-bright);border-bottom:1px solid var(--border-g);padding-bottom:2px;transition:var(--trans)}
.sec-tag{font-size:0.65rem;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--gold);margin-bottom:0.75rem}
.hero{min-height:100vh;position:relative;display:flex;align-items:center;justify-content:center;padding:120px 2rem 80px;background:var(--dark);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 50% 35%,rgba(37,99,235,0.07) 0%,transparent 70%);pointer-events:none}
.hero-content{position:relative;z-index:2;text-align:center;max-width:880px}
.hero-tag{display:flex;align-items:center;gap:1.5rem;justify-content:center;margin-bottom:2rem;font-size:0.62rem;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--muted)}
.ht-pipe{width:40px;height:2px;background:var(--blue);opacity:0.6}
.hero-h1{font-family:var(--font-head);font-size:clamp(3.5rem,8.5vw,8rem);font-weight:900;line-height:0.9;color:var(--white);margin-bottom:1.75rem;letter-spacing:-0.03em}
.h1-oc{color:var(--blue-bright)}
.h1-lon{color:var(--gold-bright)}
.tld{color:var(--dim);font-size:0.25em;vertical-align:super;font-weight:400}
.hero-p{font-size:1rem;color:var(--muted);line-height:1.8;margin-bottom:2.25rem;max-width:620px;margin-left:auto;margin-right:auto;font-weight:300}
.hero-btns{display:flex;gap:1.25rem;justify-content:center;flex-wrap:wrap;margin-bottom:3.5rem}
.hero-chain{display:flex;justify-content:center;align-items:center;gap:0;flex-wrap:wrap;padding-top:2.5rem;border-top:1px solid var(--border-lt)}
.hc-node{text-align:center;padding:0.75rem 1.25rem;border:1px solid var(--border-lt);background:var(--dark-lt)}
.hc-node.active{border-color:var(--blue);background:var(--blue-pale)}
.hcn-v{display:block;font-size:1.1rem;font-weight:800;color:var(--blue-bright);line-height:1.1;letter-spacing:-0.01em}
.hcn-l{display:block;font-size:0.55rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin-top:0.2rem}
.hc-link{width:30px;height:2px;background:var(--blue);opacity:0.4}
.city-band{background:var(--blue);padding:0.8rem 2rem;display:flex;flex-wrap:wrap;justify-content:center;gap:1.75rem;font-size:0.65rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:rgba(255,255,255,0.9)}
.cbs{color:rgba(255,255,255,0.3);font-size:0.5rem}
.name-sec{padding:7rem 0;background:var(--dark)}
.ns-grid{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center}
.ns-left h2{font-family:var(--font-serif);font-size:clamp(1.8rem,3.5vw,2.6rem);color:var(--white);line-height:1.15;margin-bottom:1.25rem}
.ns-left h2 em{font-style:italic;color:var(--blue-bright)}
.ns-left p{font-size:0.875rem;color:var(--muted);line-height:1.85;margin-bottom:1rem;font-weight:300}
.london-card{background:var(--dark-lt);border:1px solid var(--border);border-top:2px solid var(--blue);overflow:hidden}
.lc-top{background:var(--dark-panel);padding:1.5rem;border-bottom:1px solid var(--border)}
.lct-chain{display:flex;flex-direction:column;align-items:center;gap:0.35rem}
.lctc-block{font-family:var(--font-head);font-size:0.68rem;font-weight:700;color:var(--text);background:var(--dark-lt);border:1px solid var(--border-lt);padding:0.5rem 1.25rem;letter-spacing:0.08em;text-transform:uppercase;width:100%;text-align:center}
.lctc-block.active{border-color:var(--blue);color:var(--blue-bright);background:var(--blue-pale)}
.lctc-arrow{color:var(--blue);font-size:0.75rem;opacity:0.5}
.lc-data{padding:0.5rem 1.5rem 1.5rem}
.lcd-row{display:flex;justify-content:space-between;align-items:center;padding:0.65rem 0;border-bottom:1px solid var(--border-lt);font-size:0.8rem}
.lcd-row:last-child{border-bottom:none}
.lcd-row>span:first-child{color:var(--muted)}
.lcd-row>span:last-child{color:var(--text);font-weight:600;text-align:right}
.b-val{color:var(--gold-bright)!important}
.avail-v{color:var(--avail)!important;font-weight:700!important}
.lc-btn{display:block;margin:0 1.5rem 1.5rem;background:var(--blue);color:var(--white);text-align:center;padding:0.875rem;font-size:0.775rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;transition:var(--trans)}
.lc-btn:hover{background:var(--blue-lt)}
.sectors-sec{padding:7rem 0;background:var(--dark-md)}
.st{font-family:var(--font-serif);font-size:clamp(2rem,3.5vw,2.8rem);color:var(--white);line-height:1.15;margin-bottom:3.5rem}
.sectors-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border)}
.sc-card{background:var(--dark-md);padding:2.5rem;transition:var(--trans)}
.sc-card:hover{background:var(--dark-lt)}
.sc-n{font-size:0.62rem;font-weight:700;letter-spacing:0.14em;color:var(--blue-bright);display:block;margin-bottom:1rem}
.sc-card h3{font-family:var(--font-head);font-size:1rem;font-weight:700;color:var(--white);margin-bottom:0.75rem}
.sc-card p{font-size:0.825rem;color:var(--muted);line-height:1.8;font-weight:300}
.blog-prev{padding:7rem 0;background:var(--dark)}
.bp-hdr{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:2.5rem}
.bp-hdr h2{font-family:var(--font-serif);font-size:2.4rem;color:var(--white)}
.bp-grid{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto auto;gap:1.25rem}
.bp-card{display:block;background:var(--dark-lt);border:1px solid var(--border-lt);padding:2rem;transition:var(--trans)}
.bp-card:hover{border-color:var(--border);transform:translateY(-2px)}
.bp-card.bp-feat{grid-row:1/3;display:flex;flex-direction:column;justify-content:flex-end;min-height:380px;background:linear-gradient(to top,var(--dark) 20%,var(--dark-panel) 100%);border-color:var(--border)}
.bp-tag{font-size:0.6rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:var(--gold-bright);background:var(--gold-pale);border:1px solid var(--border-g);display:inline-block;padding:0.25rem 0.7rem;border-radius:3px;margin-bottom:1rem}
.bp-card h3{font-family:var(--font-serif);color:var(--white);line-height:1.35;margin-bottom:0.75rem}
.bp-card.bp-feat h3{font-size:1.3rem}
.bp-card:not(.bp-feat) h3{font-size:1rem}
.bp-card p{font-size:0.825rem;color:var(--muted);line-height:1.75;margin-bottom:1.25rem;font-weight:300}
.bp-read{font-size:0.775rem;font-weight:700;color:var(--blue-bright)}
.cta-sec{padding:6rem 0;background:var(--dark-lt);border-top:1px solid var(--border)}
.cta-inner{text-align:center;max-width:640px;margin:0 auto}
.cta-chain{font-size:2rem;color:var(--blue-bright);margin-bottom:1rem}
.cta-inner h2{font-family:var(--font-head);font-size:clamp(2.5rem,5.5vw,5rem);font-weight:900;color:var(--white);margin-bottom:1rem;letter-spacing:-0.03em;line-height:1}
.cta-inner p{font-size:0.975rem;color:var(--muted);margin-bottom:2.5rem;line-height:1.75;font-weight:300}
.cta-btns{display:flex;gap:1.25rem;justify-content:center;flex-wrap:wrap}
.footer{background:var(--dark-md);border-top:1px solid var(--border-lt);padding:3rem 0 1.5rem}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:3rem;margin-bottom:2.5rem;flex-wrap:wrap}
.footer-brand .nav-logo{display:block;margin-bottom:0.75rem}
.footer-brand p{font-size:0.775rem;color:var(--muted);max-width:380px;line-height:1.75;font-weight:300}
.footer-links{display:flex;gap:2rem;flex-wrap:wrap;align-items:center}
.footer-links a{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--muted);transition:color var(--trans)}
.footer-links a:hover{color:var(--blue-bright)}
.footer-bottom{border-top:1px solid var(--border-lt);padding-top:1.5rem;font-size:0.7rem;color:var(--muted)}
.page-hero{background:var(--dark-md);padding:148px 2rem 80px;border-bottom:1px solid var(--border)}
.page-hero h1{font-family:var(--font-serif);font-size:clamp(2.5rem,5vw,4rem);color:var(--white);line-height:1.1;margin-bottom:1.25rem}
.page-hero p{color:var(--muted);font-size:1rem;max-width:620px;line-height:1.8;font-weight:300}
.why-s{padding:5rem 0;background:var(--dark)}
.why-s:nth-child(even){background:var(--dark-md)}
.why-block{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center}
.why-block.rev{direction:rtl}.why-block.rev>*{direction:ltr}
.why-text h2{font-family:var(--font-serif);font-size:2rem;color:var(--white);margin-bottom:1rem;line-height:1.15}
.why-text p{font-size:0.875rem;color:var(--muted);line-height:1.9;margin-bottom:1rem;font-weight:300}
.why-vis{background:var(--dark-lt);border:1px solid var(--border);border-top:2px solid var(--blue);padding:2.5rem}
.vis-q{font-family:var(--font-serif);font-size:1.15rem;font-style:italic;color:var(--white);line-height:1.55;margin-bottom:1rem}
.vis-a{font-size:0.62rem;font-weight:700;color:var(--gold-bright);letter-spacing:0.12em;text-transform:uppercase}
.sb{font-family:var(--font-head);font-size:3.5rem;font-weight:900;color:var(--blue-bright);display:block;line-height:1;letter-spacing:-0.02em}
.ss{font-size:0.78rem;color:var(--muted);display:block;margin-top:0.5rem;line-height:1.5;font-weight:300}
.data-row{display:flex;align-items:center;gap:1rem;margin-bottom:0.85rem}
.dr-l{font-size:0.68rem;color:var(--muted);min-width:120px}
.dr-t{flex:1;height:4px;background:rgba(255,255,255,0.05);border-radius:2px;overflow:hidden}
.dr-f{height:100%;background:linear-gradient(to right,var(--blue),var(--gold));border-radius:2px;transition:width 1.4s ease}
.dr-v{font-size:0.7rem;color:var(--gold-bright);min-width:38px;text-align:right;font-weight:700}
.check-list{list-style:none;margin-top:1.25rem}
.check-list li{display:flex;align-items:flex-start;gap:0.75rem;font-size:0.85rem;color:var(--text);padding:0.6rem 0;border-bottom:1px solid var(--border-lt);font-weight:300}
.check-list li:last-child{border-bottom:none}
.check-list li::before{content:'◆';color:var(--blue-bright);flex-shrink:0;font-size:0.4rem;margin-top:5px}
.blog-sec{padding:5rem 0;background:var(--dark-md)}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.blog-card{display:block;background:var(--dark-lt);border:1px solid var(--border-lt);overflow:hidden;transition:var(--trans)}
.blog-card:hover{transform:translateY(-3px);border-color:var(--border)}
.blog-card-top{background:var(--dark-panel);padding:2rem;min-height:120px;display:flex;flex-direction:column;justify-content:flex-end}
.blog-card-body{padding:1.5rem}
.blog-card-body h3{font-family:var(--font-serif);font-size:1rem;color:var(--white);line-height:1.4;margin-bottom:0.75rem}
.blog-card-body p{font-size:0.8rem;color:var(--muted);line-height:1.7;margin-bottom:1rem;font-weight:300}
.blog-meta{display:flex;justify-content:space-between;font-size:0.65rem;color:var(--muted)}
.post-hero{background:var(--dark-md);padding:148px 2rem 80px;border-bottom:1px solid var(--border)}
.post-tag-lg{font-size:0.62rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:var(--gold-bright);background:var(--gold-pale);border:1px solid var(--border-g);display:inline-block;padding:0.28rem 0.85rem;border-radius:3px;margin-bottom:1.5rem}
.post-title{font-family:var(--font-serif);font-size:clamp(2rem,4vw,3.2rem);color:var(--white);line-height:1.1;max-width:820px;margin-bottom:1.5rem}
.post-byline{display:flex;gap:2rem;font-size:0.65rem;color:var(--muted);letter-spacing:0.06em;text-transform:uppercase}
.post-body{max-width:780px;margin:0 auto;padding:5rem 2rem}
.post-body h2{font-family:var(--font-serif);font-size:1.75rem;color:var(--white);margin:2.75rem 0 1rem}
.post-body p{font-size:0.95rem;color:var(--muted);line-height:1.95;margin-bottom:1.25rem;font-weight:300}
.post-body blockquote{border-left:2px solid var(--blue);padding:1rem 1.5rem;margin:2rem 0;background:var(--dark-lt);font-family:var(--font-serif);font-style:italic;font-size:1.1rem;color:var(--white);line-height:1.55}
.post-cta-box{background:var(--dark-lt);border:1px solid var(--border);border-top:2px solid var(--blue);padding:2.5rem;text-align:center;margin:3rem 0}
.post-cta-box h3{font-family:var(--font-serif);color:var(--white);font-size:1.45rem;margin-bottom:0.75rem}
.post-cta-box p{font-size:0.875rem;color:var(--muted);margin-bottom:1.5rem;font-weight:300}
.offer-sec{padding:6rem 0;background:var(--dark)}
.offer-inner{display:grid;grid-template-columns:1fr 1.15fr;gap:5rem;align-items:start}
.offer-info h2{font-family:var(--font-serif);font-size:2.4rem;color:var(--white);margin-bottom:1rem;line-height:1.1}
.offer-info h2 span{color:var(--gold-bright)}
.offer-info p{font-size:0.875rem;color:var(--muted);line-height:1.9;margin-bottom:1rem;font-weight:300}
.offer-bullets{list-style:none;margin-top:1.5rem}
.offer-bullets li{display:flex;align-items:center;gap:0.75rem;font-size:0.825rem;color:var(--text);padding:0.65rem 0;border-bottom:1px solid var(--border-lt);font-weight:300}
.offer-bullets li::before{content:'◆';color:var(--blue-bright);font-size:0.4rem;flex-shrink:0}
.offer-form-wrap{background:var(--dark-lt);border:1px solid var(--border);border-top:2px solid var(--blue);padding:2.5rem}
.offer-form-wrap h3{font-family:var(--font-serif);font-size:1.6rem;color:var(--white);margin-bottom:0.25rem}
.form-sub{font-size:0.68rem;color:var(--muted);margin-bottom:2rem}
.form-group{margin-bottom:1.25rem}
.form-group label{display:block;font-size:0.62rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin-bottom:0.5rem}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:0.875rem 1rem;background:var(--dark);border:1px solid rgba(255,255,255,0.07);border-radius:var(--radius);font-family:var(--font-head);font-size:0.875rem;color:var(--text);outline:none;transition:border-color var(--trans)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--blue)}
.form-group select option{background:var(--dark-md)}
.form-group textarea{min-height:120px;resize:vertical}
.form-submit{width:100%;padding:1rem;background:var(--blue);color:var(--white);border:none;border-radius:var(--radius);font-family:var(--font-head);font-size:0.875rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;cursor:pointer;transition:var(--trans);margin-top:0.5rem}
.form-submit:hover{background:var(--blue-lt);transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,0.35)}
.form-note{font-size:0.65rem;color:var(--muted);text-align:center;margin-top:1rem;line-height:1.6}
.success-message{display:none;background:var(--blue-pale);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center;color:var(--blue-bright);font-weight:700;margin-top:1rem}
.trust-row{background:var(--dark-lt);padding:4rem 0;border-top:1px solid var(--border)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.trust-icon{font-size:1.5rem;margin-bottom:0.75rem}
.trust-title{font-size:0.9rem;font-weight:700;color:var(--white);margin-bottom:0.5rem}
.trust-desc{font-size:0.775rem;color:var(--muted);line-height:1.6;font-weight:300}
.animate-up{opacity:0;transform:translateY(26px);animation:fadeUp 0.65s ease forwards}
.animate-fade{opacity:0;transform:translateY(16px);transition:opacity 0.55s ease,transform 0.55s ease}
.animate-fade.visible{opacity:1;transform:translateY(0)}
.delay-1{animation-delay:.1s}.delay-2{animation-delay:.25s}.delay-3{animation-delay:.4s}.delay-4{animation-delay:.55s}.delay-5{animation-delay:.7s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
@media(max-width:1024px){
  .ns-grid,.why-block,.why-block.rev,.offer-inner{grid-template-columns:1fr;direction:ltr;gap:2.5rem}
  .sectors-grid,.blog-grid,.trust-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{display:none}.hamburger{display:flex}
  .sectors-grid,.blog-grid{grid-template-columns:1fr}
  .bp-grid{grid-template-columns:1fr}
  .bp-card.bp-feat{grid-row:auto;min-height:260px}
  .bp-hdr{flex-direction:column;align-items:flex-start;gap:1rem}
  .cta-btns{flex-direction:column;align-items:center}
  .footer-inner{flex-direction:column}.footer-links{gap:1.25rem}
  .hero-chain{gap:0.25rem}.hc-link{width:15px}
  .trust-grid{grid-template-columns:1fr 1fr}
}