:root{--bg: #022c22;--surface: #034435;--text: #eaedf3;--heading: #f8fafc;--muted: #a3adbe;--primary: #22c55e;--on-primary: #000000;--accent: #92400e;--border: rgba(255,255,255,0.12)}
*, *::before, *::after{box-sizing: border-box;margin: 0;padding: 0}
body{background: var(--bg);color: var(--text);font-family:system-ui,-apple-system,"Segoe UI","Noto Sans Bengali",sans-serif;font-size: 1rem;line-height: 1.7}
.navbar{background: var(--surface);border-bottom: 1px solid var(--border);padding: .75rem 0}
.navbar-brand img{height: 40px}
.navbar-toggler{border-color: var(--border)}
.navbar-toggler-icon{filter: invert(1)}
.nav-link{color: var(--text) !important;font-size: .92rem;padding: .4rem .8rem !important;border-radius: 6px;transition: color .2s, background .2s}
.nav-link:hover, .nav-link.active{color: var(--primary) !important;background: rgba(34,197,94,.08)}
.breadcrumb-wrap{background: var(--surface);border-bottom: 1px solid var(--border);padding: .6rem 0}
.breadcrumb{margin: 0;background: transparent;font-size: .85rem}
.breadcrumb-item a{color: var(--primary);text-decoration: none}
.breadcrumb-item.active{color: var(--muted)}
.breadcrumb-item + .breadcrumb-item::before{color: var(--muted)}
.page-hero{background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);border-bottom: 1px solid var(--border);padding: 4rem 0 3rem}
.page-hero h1{color: var(--heading);font-size: clamp(1.6rem, 4vw, 2.6rem);font-weight: 700;line-height: 1.3}
.page-hero p{color: var(--muted);font-size: 1.05rem;max-width: 600px;margin: .9rem 0 0}
.hero-badge{display: inline-block;background: var(--primary);color: var(--on-primary);font-size: .72rem;font-weight: 700;padding: .2rem .6rem;border-radius: 4px;vertical-align: middle;margin-left: .4rem;letter-spacing: .04em}
.platform-card{background: var(--surface);border: 1px solid var(--border);border-radius: 18px;padding: 2rem 1.8rem;text-align: center;height: 100%;transition: transform .22s, box-shadow .22s;position: relative;overflow: hidden}
.platform-card::before{content: "";position: absolute;top: 0;left: 0;right: 0;height: 3px;background: var(--primary);border-radius: 18px 18px 0 0}
.platform-card:hover{transform: translateY(-5px);box-shadow: 0 14px 36px rgba(0,0,0,.35)}
.platform-icon{font-size: 3.2rem;margin-bottom: 1rem;display: block}
.platform-card h3{color: var(--heading);font-size: 1.2rem;font-weight: 700;margin-bottom: .5rem}
.platform-card p{color: var(--muted);font-size: .88rem;margin-bottom: 1.2rem}
.platform-meta{display: flex;justify-content: center;gap: 1.2rem;margin-bottom: 1.4rem;flex-wrap: wrap}
.platform-meta span{color: var(--muted);font-size: .78rem;display: flex;align-items: center;gap: .3rem}
.platform-meta span i{color: var(--primary)}
.btn-download{display: inline-flex;align-items: center;gap: .5rem;background: var(--primary);color: var(--on-primary);font-weight: 700;font-size: .92rem;padding: .6rem 1.6rem;border-radius: 10px;text-decoration: none;transition: opacity .2s;border: none;cursor: pointer;width: 100%;justify-content: center}
.btn-download:hover{opacity: .88;color: var(--on-primary)}
.btn-download-outline{display: inline-flex;align-items: center;gap: .5rem;background: transparent;color: var(--primary);font-weight: 600;font-size: .92rem;padding: .6rem 1.6rem;border-radius: 10px;text-decoration: none;border: 1px solid var(--primary);transition: background .2s, color .2s;width: 100%;justify-content: center;margin-top: .6rem}
.btn-download-outline:hover{background: rgba(34,197,94,.1);color: var(--primary)}
.step-card{background: var(--surface);border: 1px solid var(--border);border-radius: 14px;padding: 1.4rem;height: 100%;position: relative}
.step-num{width: 40px;height: 40px;background: var(--primary);color: var(--on-primary);border-radius: 50%;display: flex;align-items: center;justify-content: center;font-size: 1rem;font-weight: 700;margin-bottom: 1rem;flex-shrink: 0}
.step-card h5{color: var(--heading);font-size: .95rem;font-weight: 700;margin-bottom: .4rem}
.step-card p{color: var(--muted);font-size: .85rem;margin: 0}
.feature-item{display: flex;gap: 1rem;align-items: flex-start;padding: 1rem;background: var(--surface);border: 1px solid var(--border);border-radius: 12px}
.feature-icon{width: 44px;height: 44px;background: rgba(34,197,94,.12);border-radius: 10px;display: flex;align-items: center;justify-content: center;font-size: 1.3rem;flex-shrink: 0}
.feature-item h6{color: var(--heading);font-weight: 700;font-size: .92rem;margin-bottom: .2rem}
.feature-item p{color: var(--muted);font-size: .82rem;margin: 0}
.content-img{width: 100%;border-radius: 14px;display: block;object-fit: cover;max-height: 420px}
.article-body h2{color: var(--heading);font-size: 1.3rem;font-weight: 700;margin: 1.8rem 0 .6rem}
.article-body h3{color: var(--heading);font-size: 1.1rem;font-weight: 600;margin: 1.4rem 0 .5rem}
.article-body p{color: var(--text);margin-bottom: 1rem;line-height: 1.8}
.article-body ul{color: var(--text);padding-left: 1.3rem;margin-bottom: 1rem}
.article-body ul li{margin-bottom: .4rem}
.req-table{width: 100%;border-collapse: collapse;font-size: .88rem}
.req-table th{background: var(--surface);color: var(--primary);font-weight: 700;padding: .7rem 1rem;text-align: left;border-bottom: 1px solid var(--border)}
.req-table td{color: var(--text);padding: .65rem 1rem;border-bottom: 1px solid var(--border);vertical-align: top}
.req-table tr:last-child td{border-bottom: none}
.req-table tr:nth-child(even) td{background: rgba(3,68,53,.4)}
.stat-pill{background: var(--surface);border: 1px solid var(--border);border-radius: 12px;padding: 1rem 1.2rem;text-align: center}
.stat-pill .num{color: var(--primary);font-size: 1.6rem;font-weight: 700}
.stat-pill .lbl{color: var(--muted);font-size: .78rem;margin-top: .1rem}
.promo-strip{background: linear-gradient(90deg, var(--accent) 0%, #b45309 100%);border-radius: 14px;padding: 1.4rem 2rem;display: flex;align-items: center;justify-content: space-between;flex-wrap: wrap;gap: 1rem}
.promo-strip h3{color: var(--heading);font-size: 1.1rem;font-weight: 700;margin: 0}
.promo-strip p{color: rgba(255,255,255,.85);font-size: .88rem;margin: .2rem 0 0}
.btn-promo{display: inline-block;background: var(--heading);color: var(--accent);font-weight: 700;font-size: .9rem;padding: .55rem 1.4rem;border-radius: 8px;text-decoration: none;white-space: nowrap;transition: opacity .2s}
.btn-promo:hover{opacity: .9;color: var(--accent)}
.section-title{color: var(--heading);font-size: 1.5rem;font-weight: 700;margin-bottom: .4rem}
.section-sub{color: var(--muted);font-size: .95rem;margin-bottom: 1.5rem}
.highlight-box{background: var(--surface);border: 1px solid var(--border);border-radius: 14px;padding: 1.4rem 1.6rem}
.highlight-box h4{color: var(--heading);font-size: 1rem;font-weight: 700;margin-bottom: .8rem}
.accordion-button{background: var(--bg) !important;color: var(--heading) !important;font-size: .95rem;font-weight: 600;box-shadow: none !important}
.accordion-button::after{filter: invert(1) brightness(2)}
.accordion-button:not(.collapsed){color: var(--primary) !important}
.accordion-item{background: var(--bg);border: 1px solid var(--border) !important;border-radius: 10px !important;margin-bottom: .6rem;overflow: hidden}
.accordion-body{background: var(--bg);color: var(--text);font-size: .9rem}
footer{background: var(--surface);border-top: 1px solid var(--border);padding: 3rem 0 1.5rem}
.footer-link{color: var(--muted);font-size: .87rem;text-decoration: none;transition: color .2s}
.footer-link:hover{color: var(--primary)}
@media  (max-width: 576px) {.page-hero{padding: 2.2rem 0 1.8rem}
.promo-strip{flex-direction: column;text-align: center}}