/* crypto.net.ng — Nigerian crypto guide
   Colors: Nigerian green + Bitcoin orange, mobile-first */

:root{
  --ng-green:#008751;
  --ng-green-dark:#006b40;
  --ng-green-light:#e8f5ef;
  --btc-orange:#f7931a;
  --btc-orange-dark:#d97706;
  --ink:#0f1720;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --bg-dark:#0b1220;
  --danger:#dc2626;
  --warn:#ca8a04;
  --ok:#16a34a;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,23,32,.04),0 8px 24px rgba(15,23,32,.06);
  --shadow-lg:0 10px 30px rgba(15,23,32,.10);
  --maxw:1180px;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--ng-green-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;color:var(--ink);margin:0 0 .6em}
h1{font-size:clamp(1.9rem,4.4vw,2.6rem);font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:800;letter-spacing:-.01em;margin-top:1.4em}
h3{font-size:clamp(1.2rem,2.2vw,1.4rem);font-weight:700;margin-top:1.2em}
h4{font-size:1.05rem;font-weight:700;margin-top:1em}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em;margin:0 0 1em}
li{margin:.35em 0}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}
blockquote{border-left:4px solid var(--btc-orange);background:#fff7ed;padding:1em 1.2em;margin:1.2em 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-2)}
code{background:#f1f5f9;padding:2px 6px;border-radius:6px;font-size:.92em}

.container{max-width:var(--maxw);margin:0 auto;padding:0 18px}
.section{padding:56px 0}
.section-sm{padding:36px 0}
.bg-soft{background:var(--bg-soft)}
.bg-green{background:linear-gradient(135deg,var(--ng-green) 0%,var(--ng-green-dark) 100%);color:#fff}
.bg-green h1,.bg-green h2,.bg-green h3{color:#fff}
.bg-green a{color:#fff;text-decoration:underline}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;max-width:var(--maxw);margin:0 auto;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:1.15rem}
.brand:hover{text-decoration:none}
.brand-mark{width:36px;height:36px;flex:0 0 36px}
.brand-name{display:flex;flex-direction:column;line-height:1}
.brand-name small{font-weight:500;color:var(--muted);font-size:.7rem;margin-top:3px;letter-spacing:.04em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:8px}
.nav a{color:var(--ink-2);font-weight:600;padding:8px 12px;border-radius:8px;font-size:.95rem}
.nav a:hover{background:var(--ng-green-light);color:var(--ng-green-dark);text-decoration:none}
.nav-cta{display:none}
.menu-toggle{display:none;background:transparent;border:1px solid var(--line);padding:8px;border-radius:8px;cursor:pointer}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{content:"";display:block;width:22px;height:2px;background:var(--ink);position:relative}
.menu-toggle span::before{position:absolute;top:-7px}
.menu-toggle span::after{position:absolute;top:7px}

@media (max-width:880px){
  .nav{position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 14px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none}
  .nav.open{display:flex}
  .nav a{padding:12px;font-size:1rem}
  .menu-toggle{display:inline-flex;align-items:center}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:700;text-decoration:none;transition:transform .08s ease,box-shadow .15s ease,background .15s ease;border:1px solid transparent;font-size:1rem;cursor:pointer;line-height:1.2}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-primary{background:var(--btc-orange);color:#fff}
.btn-primary:hover{background:var(--btc-orange-dark);color:#fff}
.btn-green{background:var(--ng-green);color:#fff}
.btn-green:hover{background:var(--ng-green-dark);color:#fff}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ng-green)}
.btn-outline-white{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline-white:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{padding:8px 14px;font-size:.9rem}
.btn-block{display:flex;width:100%}

.badge{display:inline-flex;align-items:center;gap:6px;background:var(--ng-green-light);color:var(--ng-green-dark);padding:5px 10px;border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.02em}
.badge-orange{background:#fff7ed;color:var(--btc-orange-dark)}
.badge-white{background:rgba(255,255,255,.18);color:#fff}

/* Hero */
.hero{position:relative;padding:64px 0 56px;background:radial-gradient(1200px 500px at 80% -10%,rgba(247,147,26,.18),transparent 60%),linear-gradient(135deg,#0b1220 0%,#0f2b1f 60%,#013820 100%);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:url('../img/nigeria-crypto-hero.jpg') center/cover no-repeat;opacity:.12;pointer-events:none}
.hero .container{position:relative;z-index:2}
.hero h1{color:#fff;margin-bottom:.5em}
.hero p.lede{font-size:1.1rem;color:#dbeadb;max-width:64ch;margin:0 0 1.4em}
.hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:36px;align-items:center}
.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:22px;backdrop-filter:blur(6px)}
.hero-card h3{color:#fff;margin-top:0}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.hero-mini{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px;color:#cfe8d7;font-size:.92rem}
.hero-mini span{display:inline-flex;align-items:center;gap:6px}
.hero-mini span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--btc-orange);display:inline-block}
@media (max-width:880px){.hero-grid{grid-template-columns:1fr;gap:22px}.hero{padding:42px 0 40px}}

/* Cards & grids */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:880px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}}
@media (max-width:560px){.grid-3,.grid-4{grid-template-columns:1fr}}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:border-color .15s ease,transform .08s ease,box-shadow .15s ease}
.card:hover{border-color:var(--ng-green);box-shadow:var(--shadow)}
.card h3{margin-top:0}
.card p:last-child{margin-bottom:0}
.card-link{display:block;color:inherit}
.card-link:hover{text-decoration:none}
.card-icon{width:42px;height:42px;border-radius:10px;background:var(--ng-green-light);color:var(--ng-green-dark);display:inline-flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:10px;font-weight:700}
.card-icon.orange{background:#fff7ed;color:var(--btc-orange-dark)}
.card-arrow{margin-top:10px;font-weight:700;color:var(--ng-green-dark);font-size:.92rem}

/* Compare table */
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;-webkit-overflow-scrolling:touch}
table.compare{width:100%;border-collapse:collapse;min-width:760px;font-size:.95rem}
table.compare thead{background:var(--bg-soft)}
table.compare th,table.compare td{text-align:left;padding:14px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.compare th{font-size:.82rem;font-weight:700;color:var(--ink-2);letter-spacing:.04em;text-transform:uppercase}
table.compare tr:last-child td{border-bottom:0}
table.compare .ex-logo{width:36px;height:36px;border-radius:8px;display:inline-block;vertical-align:middle;margin-right:10px;background:#f1f5f9}
.ex-cell{display:flex;align-items:center;gap:10px;min-width:160px}
.ex-name{font-weight:700;color:var(--ink)}
.ex-sub{font-size:.8rem;color:var(--muted);margin-top:2px}
.rating{color:var(--btc-orange);font-weight:700;letter-spacing:.05em}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.tag-licensed{background:#dcfce7;color:#166534;padding:3px 8px;border-radius:999px;font-size:.72rem;font-weight:700}
.tag-warn{background:#fef3c7;color:#92400e;padding:3px 8px;border-radius:999px;font-size:.72rem;font-weight:700}

/* Simple data table */
table.data{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:1.2em 0}
table.data th,table.data td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.95rem}
table.data th{background:var(--bg-soft);font-weight:700;font-size:.85rem;color:var(--ink-2);text-transform:uppercase;letter-spacing:.04em}
table.data tr:last-child td{border-bottom:0}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* Callouts */
.callout{padding:16px 18px;border-radius:var(--radius);margin:1.4em 0;border:1px solid var(--line);background:#fff}
.callout-warn{background:#fffbeb;border-color:#fde68a}
.callout-warn strong{color:#92400e}
.callout-tip{background:var(--ng-green-light);border-color:#bbf7d0}
.callout-tip strong{color:var(--ng-green-dark)}
.callout-danger{background:#fef2f2;border-color:#fecaca}
.callout-danger strong{color:var(--danger)}
.callout p:last-child{margin-bottom:0}

/* Step list */
ol.steps{counter-reset:step;list-style:none;padding:0}
ol.steps>li{counter-increment:step;position:relative;padding:18px 18px 18px 64px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin:0 0 12px}
ol.steps>li::before{content:counter(step);position:absolute;left:18px;top:18px;width:32px;height:32px;background:var(--ng-green);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem}
ol.steps>li h4{margin:0 0 6px}

/* Breadcrumbs */
.crumbs{font-size:.85rem;color:var(--muted);padding:14px 0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ng-green-dark)}
.crumbs span+span::before{content:"/";margin:0 8px;color:var(--line)}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin:0 0 10px}
.faq details[open]{border-color:var(--ng-green)}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--ng-green-dark);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details>p,.faq details>ul{margin-top:10px}

/* Stats strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:2em 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-align:center}
.stat-num{font-size:1.8rem;font-weight:800;color:var(--ng-green-dark);line-height:1}
.stat-lbl{font-size:.85rem;color:var(--muted);margin-top:6px}
@media (max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Hub list */
.hub-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.hub-list a{display:block;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:10px;color:var(--ink);font-weight:600;text-decoration:none;transition:all .12s ease}
.hub-list a:hover{border-color:var(--ng-green);background:var(--ng-green-light);color:var(--ng-green-dark);transform:translateY(-1px)}
.hub-list a small{display:block;color:var(--muted);font-weight:500;font-size:.78rem;margin-top:2px}
.hub-list a:hover small{color:var(--ng-green-dark)}
@media (max-width:880px){.hub-list{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.hub-list{grid-template-columns:1fr}}

/* Tag chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:1em 0}
.chip{background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px;font-size:.85rem;color:var(--ink-2);text-decoration:none}
.chip:hover{border-color:var(--ng-green);color:var(--ng-green-dark);text-decoration:none}

/* Sticky CTA bar (mobile) */
.cta-strip{background:linear-gradient(135deg,var(--btc-orange),var(--btc-orange-dark));color:#fff;padding:28px;border-radius:var(--radius);margin:2em 0;display:grid;grid-template-columns:1.4fr auto;gap:18px;align-items:center}
.cta-strip h3{color:#fff;margin:0 0 6px}
.cta-strip p{margin:0;color:#fff7ed}
.cta-strip .btn{background:#fff;color:var(--btc-orange-dark)}
.cta-strip .btn:hover{background:#fff7ed}
@media (max-width:720px){.cta-strip{grid-template-columns:1fr}}

/* Logo cards (exchange placeholder svg style) */
.ex-logo-svg{width:36px;height:36px;border-radius:8px;flex:0 0 36px;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:.9rem;letter-spacing:-.02em}

/* Footer */
.site-footer{background:#0b1220;color:#cbd5e1;padding:48px 0 24px;margin-top:64px}
.site-footer h4{color:#fff;font-size:.95rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 14px}
.site-footer a{color:#cbd5e1}
.site-footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin:.4em 0;font-size:.92rem}
.foot-brand{display:flex;gap:12px;align-items:center;margin-bottom:14px}
.foot-brand span{font-weight:800;color:#fff;font-size:1.1rem}
.foot-disclaimer{font-size:.82rem;color:#94a3b8;border-top:1px solid #1e293b;padding-top:20px;margin-top:30px;line-height:1.6}
@media (max-width:880px){.foot-grid{grid-template-columns:1fr 1fr;gap:24px}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* Article content layout */
.article-wrap{display:grid;grid-template-columns:1fr 280px;gap:42px;align-items:start;margin-top:24px}
.toc{position:sticky;top:90px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;font-size:.92rem}
.toc h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px;color:var(--muted)}
.toc ol{list-style:none;padding:0;margin:0;counter-reset:tocit}
.toc li{counter-increment:tocit;margin:.45em 0}
.toc li::before{content:counter(tocit) ".";color:var(--muted);margin-right:6px}
.toc a{color:var(--ink-2)}
.toc a:hover{color:var(--ng-green-dark)}
@media (max-width:980px){.article-wrap{grid-template-columns:1fr}.toc{position:static;display:none}}

/* Visual list */
.feat{display:flex;gap:14px;align-items:flex-start}
.feat-icon{flex:0 0 32px;width:32px;height:32px;border-radius:8px;background:var(--ng-green-light);color:var(--ng-green-dark);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;margin-top:2px}
.feat h4{margin:0 0 4px}
.feat p{margin:0;color:var(--ink-2)}

img.inline-img{border-radius:var(--radius);box-shadow:var(--shadow);margin:1em 0}
figure{margin:1.5em 0}
figcaption{font-size:.85rem;color:var(--muted);margin-top:8px;text-align:center}

/* Utility */
.text-center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.lead{font-size:1.08rem;color:var(--ink-2)}
.hidden{display:none}
.nowrap{white-space:nowrap}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}