/* EOMSBD buyer-guide pages (ecommerce requirements series) */
:root{--brand:#0E7490;--brand-d:#155E75;--accent:#F59E0B;--ink:#0F172A;--body:#334155;--muted:#64748B;--line:#E2E8F0;--soft:#F1F5F9;--ok:#16A34A;--wa:#25D366}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Hind Siliguri','Inter',system-ui,sans-serif;color:var(--body);background:#fff;font-size:17px;line-height:1.85;overflow-x:hidden}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.container{max-width:1160px;margin:0 auto;padding:0 20px}

/* Nav */
.navbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;max-width:1160px;margin:0 auto}
.nav-logo{display:flex;align-items:center;gap:10px;font-family:'Plus Jakarta Sans',sans-serif;font-size:20px;color:var(--ink);font-weight:700}
.nav-logo:hover{text-decoration:none}
.logo-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#0E7490,#06B6D4);display:grid;place-items:center;color:#fff;font-size:16px}
.nav-links{display:flex;list-style:none;gap:22px}
.nav-links a{color:var(--body);font-size:15px;font-weight:500}
.btn-nav-cta{background:var(--wa);color:#fff!important;padding:9px 18px;border-radius:9px;font-weight:700;font-size:15px;white-space:nowrap}
.btn-nav-cta:hover{text-decoration:none;filter:brightness(.95)}
@media(max-width:760px){.nav-links{display:none}}

.crumbs{background:var(--soft);border-bottom:1px solid var(--line);font-size:14px;padding:9px 0;color:var(--muted)}
.crumbs a{color:var(--brand)}
.crumbs span.sep{margin:0 8px}

/* Hero */
.g-hero{background:linear-gradient(135deg,#083344 0%,#0E7490 60%,#0891B2 100%);color:#fff;padding:64px 0 56px;position:relative;overflow:hidden}
.g-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.35),transparent 70%);animation:gFloat 14s ease-in-out infinite}
@keyframes gFloat{0%,100%{transform:translate(0,0)}50%{transform:translate(-60px,50px)}}
.g-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:5px 14px;border-radius:100px;font-size:14px;margin-bottom:16px}
.g-hero h1{font-size:clamp(28px,4.4vw,44px);line-height:1.3;color:#fff;max-width:860px;margin-bottom:14px}
.g-hero .lead{font-size:18.5px;color:rgba(255,255,255,.88);max-width:780px;margin-bottom:24px}
.g-meta{font-size:14px;color:rgba(255,255,255,.75);display:flex;gap:18px;flex-wrap:wrap;margin-bottom:24px}
.g-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:11px;font-weight:700;font-size:16px;border:none;cursor:pointer;font-family:inherit;transition:transform .2s,box-shadow .2s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-wa{background:var(--wa);color:#fff;box-shadow:0 8px 22px rgba(37,211,102,.35)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}

/* Layout */
.g-main{padding:48px 0 30px}
.g-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start}
@media(max-width:960px){.g-grid{grid-template-columns:minmax(0,1fr)}.g-side{display:none}}
.g-side{position:sticky;top:84px}
.toc{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:18px}
.toc h4{font-size:15px;color:var(--ink);margin-bottom:8px}
.toc ol{padding-left:18px;font-size:14.5px;line-height:1.7}
.side-cta{background:linear-gradient(135deg,#083344,#0E7490);color:#fff;border-radius:14px;padding:20px}
.side-cta h4{color:#fff;font-size:17px;margin-bottom:6px}
.side-cta p{font-size:14.5px;color:rgba(255,255,255,.85);margin-bottom:14px;line-height:1.6}
.side-cta .btn{width:100%;justify-content:center;font-size:15px;padding:11px}

/* Article typography */
.article h2{font-size:clamp(23px,3vw,29px);color:var(--ink);line-height:1.4;margin:42px 0 14px;scroll-margin-top:84px}
.article h2:first-child{margin-top:0}
.article h3{font-size:20px;color:var(--ink);margin:26px 0 10px}
.article p{margin-bottom:16px}
.article ul,.article ol{margin:0 0 18px 22px}
.article li{margin-bottom:7px}
.article strong{color:var(--ink)}

/* Answer-first summary box */
.tldr{background:#ECFEFF;border:1px solid #A5F3FC;border-left:5px solid var(--brand);border-radius:12px;padding:20px 22px;margin-bottom:30px}
.tldr .tl-h{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--brand-d);margin-bottom:6px;font-size:16px}
.tldr p{margin-bottom:8px}
.tldr ul{margin:6px 0 0 20px}

/* Tables */
.tbl-wrap{overflow-x:auto;margin:6px 0 22px;border:1px solid var(--line);border-radius:12px}
table.cmp{width:100%;border-collapse:collapse;font-size:15.5px;min-width:520px}
table.cmp th{background:var(--ink);color:#fff;text-align:left;padding:11px 14px;font-weight:600}
table.cmp td{padding:11px 14px;border-top:1px solid var(--line);vertical-align:top}
table.cmp tr:nth-child(even) td{background:#F8FAFC}
table.cmp tr.total td{background:#FEF3C7;font-weight:700;color:var(--ink)}

/* Callouts */
.callout{border-radius:12px;padding:16px 20px;margin:4px 0 22px;display:flex;gap:14px;align-items:flex-start}
.callout i{font-size:20px;margin-top:5px}
.callout.tip{background:#F0FDF4;border:1px solid #BBF7D0}.callout.tip i{color:var(--ok)}
.callout.warn{background:#FFFBEB;border:1px solid #FDE68A}.callout.warn i{color:#D97706}
.callout.eoms{background:#EFF6FF;border:1px solid #BFDBFE}.callout.eoms i{color:#2563EB}
.callout p:last-child{margin-bottom:0}

/* Checklist */
ul.checklist{list-style:none;margin-left:0}
ul.checklist li{position:relative;padding-left:32px}
ul.checklist li::before{content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;left:0;top:3px;width:22px;height:22px;border-radius:50%;background:#DCFCE7;color:var(--ok);font-size:11px;display:grid;place-items:center}

/* Steps */
ol.steps{list-style:none;margin-left:0;counter-reset:st}
ol.steps li{counter-increment:st;position:relative;padding:2px 0 14px 50px}
ol.steps li::before{content:counter(st);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;display:grid;place-items:center;font-size:15px}

/* FAQ */
.faq{margin-top:10px}
.faq details{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--brand)}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 18px 16px;margin:0}

/* Related */
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin-top:12px}
.related a{display:block;border:1px solid var(--line);border-radius:12px;padding:14px 16px;color:var(--ink);font-weight:600;font-size:15.5px;line-height:1.5;transition:border-color .2s,transform .2s}
.related a:hover{border-color:var(--brand);transform:translateY(-2px);text-decoration:none}
.related a small{display:block;color:var(--muted);font-weight:400;font-size:13.5px;margin-top:3px}

/* Lead form */
.g-cta{background:linear-gradient(135deg,#083344,#0E7490);color:#fff;padding:56px 0;margin-top:40px}
.g-cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
@media(max-width:860px){.g-cta-inner{grid-template-columns:1fr}}
.g-cta h2{color:#fff;font-size:clamp(24px,3.4vw,32px);margin-bottom:10px;line-height:1.4}
.g-cta p{color:rgba(255,255,255,.85)}
.g-cta ul{list-style:none;margin-top:16px}
.g-cta li{margin-bottom:8px}
.g-cta li i{color:var(--accent);margin-right:8px}
.g-form{background:#fff;border-radius:16px;padding:26px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.g-form h3{color:var(--ink);font-size:19px;margin-bottom:14px}
.g-form input,.g-form textarea{width:100%;border:1px solid #CBD5E1;border-radius:10px;padding:12px 14px;font-size:16px;font-family:inherit;margin-bottom:12px;color:var(--ink)}
.g-form input:focus,.g-form textarea:focus{outline:2px solid var(--brand);border-color:transparent}
.g-form button{width:100%;background:var(--wa);color:#fff;border:none;border-radius:10px;padding:14px;font-size:17px;font-weight:700;cursor:pointer;font-family:inherit}
.g-form small{display:block;color:var(--muted);text-align:center;margin-top:8px;font-size:13px}

/* Footer */
.footer{background:#0B1220;color:#94A3B8;padding:44px 0 90px;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr}}
.footer h4{color:#fff;font-size:16px;margin-bottom:10px}
.footer ul{list-style:none}
.footer li{margin-bottom:6px}
.footer a{color:#CBD5E1}
.footer-bottom{border-top:1px solid #1E293B;margin-top:30px;padding-top:18px;font-size:14px}
.footer .nav-logo{color:#fff;margin-bottom:10px}

.whatsapp-float{position:fixed;right:18px;bottom:18px;z-index:60;width:58px;height:58px;border-radius:50%;background:var(--wa);color:#fff;display:grid;place-items:center;font-size:30px;box-shadow:0 10px 26px rgba(37,211,102,.45)}
.whatsapp-float:hover{text-decoration:none}

/* Reveal */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-up.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.fade-up{opacity:1;transform:none;transition:none}.g-hero::after{animation:none}}