:root {
  --bg: #F7F5EF; --bg-alt: #EDEAE2; --surface: #fff;
  --primary: #1A7A42; --primary-dark: #0E5A2E; --primary-light: #E6F4EC;
  --accent: #D4540E; --accent-light: #FEF0E7;
  --text: #1C1C1C; --text-sec: #4A4A4A; --text-muted: #8A8A8A;
  --border: #E5E2D9;
  --radius: 14px; --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.1);
  --bn-serif: "Noto Serif Bengali", serif;
  --bn: "Noto Sans Bengali", sans-serif;
  --en: "Inter", sans-serif;
  --wa-green: #25D366;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--bn); line-height: 1.7; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
input, select, button, textarea { font-family: inherit; }

/* NAV */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 14px 28px; display: flex; align-items: center; justify-content: space-between; background: rgba(247,245,239,.85); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); transition: box-shadow .3s; }
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.08); }
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand img { width: 36px; height: 36px; border-radius: 50%; }
.nav-brand-text { font-family: var(--en); font-weight: 700; font-size: 18px; color: var(--primary-dark); }
.nav-brand-sub { font-size: 10px; color: var(--text-muted); font-family: var(--en); display: block; letter-spacing: .05em; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-link { font-size: 13px; color: var(--text-sec); font-family: var(--en); transition: color .2s; }
.nav-link:hover { color: var(--primary); }
.btn-wa { display: inline-flex; align-items: center; gap: 8px; background: var(--wa-green); color: #fff; padding: 10px 20px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; border: none; cursor: pointer; transition: transform .15s, box-shadow .2s; font-family: var(--bn); }
.btn-wa:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(37,211,102,.3); }
.btn-wa svg { width: 18px; height: 18px; fill: #fff; }
.nav-burger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; margin: 5px 0; transition: .3s; }
.mobile-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; z-index: 99; background: rgba(247,245,239,.97); backdrop-filter: blur(16px); padding: 20px 28px; flex-direction: column; gap: 12px; border-bottom: 1px solid var(--border); }
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 15px; padding: 10px 0; border-bottom: 1px solid var(--border); color: var(--text-sec); }

/* HERO */
.hero { min-height: 100vh; padding: 100px 28px 60px; display: flex; align-items: center; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; top: -20%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(26,122,66,.08) 0%, transparent 70%); pointer-events: none; }
.hero::after { content: ""; position: absolute; bottom: -10%; left: -5%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(212,84,14,.05) 0%, transparent 70%); pointer-events: none; }
.hero-inner { max-width: 1140px; margin: 0 auto; width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 2; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; background: var(--primary-light); color: var(--primary-dark); font-size: 12px; font-weight: 600; padding: 6px 14px; border-radius: 20px; margin-bottom: 20px; font-family: var(--en); }
.hero-tag::before { content: ""; width: 6px; height: 6px; background: var(--primary); border-radius: 50%; }
.hero-h1 { font-family: var(--bn-serif); font-size: clamp(28px, 4vw, 48px); font-weight: 800; color: var(--text); line-height: 1.3; margin-bottom: 16px; }
.hero-h1 em { color: var(--primary); font-style: normal; }
.hero-sub { font-size: 16px; color: var(--text-sec); line-height: 1.8; margin-bottom: 8px; }
.hero-sub-en { font-family: var(--en); font-size: 13px; color: var(--text-muted); font-style: italic; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff; padding: 14px 28px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; border: none; cursor: pointer; transition: all .2s; font-family: var(--bn); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: var(--text-sec); padding: 14px 28px; border-radius: var(--radius-sm); font-size: 15px; border: 1.5px solid var(--border); cursor: pointer; transition: all .2s; font-family: var(--bn); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* PHONE MOCKUP */
.mockup-area { display: flex; justify-content: center; position: relative; }
.phone { width: 280px; background: #111; border-radius: 32px; padding: 12px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,.1); position: relative; }
.phone-inner { background: #0A1F12; border-radius: 22px; overflow: hidden; min-height: 500px; }
.phone-notch { width: 100px; height: 24px; background: #111; border-radius: 0 0 14px 14px; margin: 0 auto; position: relative; z-index: 2; }
.phone-screen { padding: 16px; }
.ph-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; padding-top: 4px; }
.ph-title { font-family: var(--bn-serif); font-size: 15px; color: #F0FFF4; font-weight: 700; }
.ph-badge { background: rgba(37,211,102,.15); color: #25D366; font-family: var(--en); font-size: 10px; font-weight: 600; padding: 3px 8px; border-radius: 5px; }
.ph-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.ph-stat { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); border-radius: 10px; padding: 12px; }
.ph-stat-val { font-family: var(--en); font-size: 22px; font-weight: 700; color: #4ADE80; }
.ph-stat-lbl { font-size: 11px; color: rgba(255,255,255,.5); margin-top: 2px; }
.ph-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.06); font-size: 13px; }
.ph-row:last-child { border: none; }
.ph-row-l { color: rgba(255,255,255,.6); }
.ph-row-r { font-family: var(--en); font-weight: 600; color: #F0FFF4; font-size: 12px; }
.ph-row-r.green { color: #4ADE80; }
.ph-row-r.red { color: #F87171; }
.ph-btn { display: block; width: 100%; padding: 12px; background: var(--primary); color: #fff; border: none; border-radius: 10px; font-size: 13px; font-weight: 600; text-align: center; margin-top: 14px; cursor: default; font-family: var(--bn); }
.mockup-float { position: absolute; background: #fff; border-radius: 10px; padding: 10px 14px; box-shadow: var(--shadow-lg); font-family: var(--en); font-size: 12px; font-weight: 600; color: var(--primary-dark); display: flex; align-items: center; gap: 8px; animation: bobble 4s ease-in-out infinite; }
.mockup-float.f1 { top: 40px; right: -20px; }
.mockup-float.f2 { bottom: 80px; left: -30px; animation-delay: 1.5s; }
.mockup-float .dot { width: 8px; height: 8px; border-radius: 50%; }
.mockup-float .dot.g { background: #4ADE80; }
.mockup-float .dot.o { background: #F59E0B; }
@keyframes bobble { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* SECTION SHARED */
.section { padding: 80px 28px; }
.section-alt { background: var(--bg-alt); }
.section-green { background: var(--primary-dark); color: #fff; }
.wrap { max-width: 1140px; margin: 0 auto; }
.sec-label { display: inline-flex; align-items: center; gap: 8px; font-family: var(--en); font-size: 11px; font-weight: 600; letter-spacing: .15em; text-transform: uppercase; color: var(--primary); margin-bottom: 12px; }
.sec-label::before { content: ""; width: 20px; height: 2px; background: var(--primary); border-radius: 1px; }
.sec-h2 { font-family: var(--bn-serif); font-size: clamp(24px, 3vw, 36px); font-weight: 800; line-height: 1.3; margin-bottom: 10px; }
.sec-p { font-size: 15px; color: var(--text-sec); max-width: 560px; line-height: 1.75; }
.sec-p-en { font-family: var(--en); font-size: 13px; color: var(--text-muted); font-style: italic; margin-top: 4px; }

/* FEATURES */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.feat-card { background: var(--surface); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); transition: transform .2s, box-shadow .2s; }
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.feat-icon.health { background: #DCFCE7; }
.feat-icon.growth { background: #DBEAFE; }
.feat-icon.death { background: #FEE2E2; }
.feat-icon.med { background: #F3E8FF; }
.feat-icon.sale { background: #FEF3C7; }
.feat-icon.cost { background: #E0F2FE; }
.feat-title { font-family: var(--bn-serif); font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.feat-title-en { font-family: var(--en); font-size: 11px; color: var(--text-muted); margin-bottom: 10px; }
.feat-desc { font-size: 14px; color: var(--text-sec); line-height: 1.7; }

/* SCREENS */
.screens-tabs { display: flex; gap: 8px; margin-bottom: 32px; margin-top: 40px; flex-wrap: wrap; }
.screen-tab { padding: 10px 20px; border-radius: var(--radius-sm); border: 1.5px solid var(--border); background: var(--surface); font-size: 13px; cursor: pointer; transition: all .2s; font-family: var(--bn); color: var(--text-sec); }
.screen-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.screen-container { display: flex; justify-content: center; }
.screen-phone { width: 320px; background: #0A1F12; border-radius: 28px; padding: 20px; box-shadow: var(--shadow-lg); }
.screen-content { display: none; }
.screen-content.active { display: block; }
.sc-title { font-family: var(--bn-serif); font-size: 16px; color: #F0FFF4; margin-bottom: 16px; font-weight: 700; }
.sc-input-group { margin-bottom: 12px; }
.sc-label { font-size: 12px; color: rgba(255,255,255,.5); margin-bottom: 4px; display: block; }
.sc-input { width: 100%; padding: 10px 12px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); border-radius: 8px; color: #F0FFF4; font-size: 14px; font-family: var(--bn); }
.sc-input::placeholder { color: rgba(255,255,255,.25); }
.sc-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; background: rgba(255,255,255,.04); border-radius: 8px; margin-bottom: 6px; font-size: 13px; }
.sc-row-l { color: rgba(255,255,255,.6); }
.sc-row-r { color: #4ADE80; font-family: var(--en); font-weight: 600; font-size: 12px; }
.sc-total { background: rgba(74,222,128,.1); border: 1px solid rgba(74,222,128,.2); border-radius: 10px; padding: 14px; margin-top: 12px; text-align: center; }
.sc-total-val { font-family: var(--en); font-size: 24px; font-weight: 700; color: #4ADE80; }
.sc-total-lbl { font-size: 12px; color: rgba(255,255,255,.5); }

/* STEPS */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 48px; position: relative; }
.steps-grid::before { content: ""; position: absolute; top: 36px; left: 15%; right: 15%; height: 2px; background: linear-gradient(90deg, transparent, var(--border), transparent); z-index: 0; }
.step { text-align: center; position: relative; z-index: 1; }
.step-num { width: 72px; height: 72px; border-radius: 50%; background: var(--surface); border: 2px solid var(--primary); display: flex; flex-direction: column; align-items: center; justify-content: center; margin: 0 auto 18px; box-shadow: 0 0 0 6px var(--primary-light); }
.step-num span { font-family: var(--en); font-size: 11px; color: var(--primary); font-weight: 600; }
.step-num em { font-size: 24px; font-style: normal; }
.step-title { font-family: var(--bn-serif); font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.step-desc { font-size: 13px; color: var(--text-sec); line-height: 1.6; }
.step-desc i { font-family: var(--en); font-size: 12px; color: var(--text-muted); display: block; margin-top: 3px; }

/* CTA */
.cta-box { background: var(--primary-dark); border-radius: 20px; padding: 52px 40px; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta-box::before { content: ""; position: absolute; top: -50%; right: -20%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,255,255,.06), transparent 70%); pointer-events: none; }
.cta-h2 { font-family: var(--bn-serif); font-size: clamp(22px, 3vw, 32px); font-weight: 800; margin-bottom: 12px; }
.cta-p { font-size: 15px; opacity: .8; max-width: 480px; margin: 0 auto 24px; line-height: 1.7; }
.btn-wa-lg { display: inline-flex; align-items: center; gap: 10px; background: var(--wa-green); color: #fff; padding: 16px 36px; border-radius: 12px; font-size: 17px; font-weight: 700; border: none; cursor: pointer; transition: all .2s; font-family: var(--bn); }
.btn-wa-lg:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,211,102,.35); }
.btn-wa-lg svg { width: 22px; height: 22px; fill: #fff; }

/* FOOTER */
.footer { background: #1C1C1C; color: rgba(255,255,255,.5); padding: 40px 28px 24px; }
.footer-inner { max-width: 1140px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-brand { font-family: var(--en); font-size: 16px; font-weight: 700; color: #fff; }
.footer-copy { font-family: var(--en); font-size: 12px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-family: var(--en); font-size: 12px; color: rgba(255,255,255,.5); transition: color .2s; }
.footer-links a:hover { color: #fff; }

/* FLOATING WA */
.wa-float { position: fixed; bottom: 24px; right: 24px; z-index: 90; width: 56px; height: 56px; background: var(--wa-green); border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(37,211,102,.4); cursor: pointer; transition: transform .2s; animation: pulse-wa 2s ease-in-out infinite; }
.wa-float:hover { transform: scale(1.1); }
.wa-float svg { width: 28px; height: 28px; fill: #fff; }
@keyframes pulse-wa { 0%,100% { box-shadow: 0 4px 16px rgba(37,211,102,.4); } 50% { box-shadow: 0 4px 24px rgba(37,211,102,.6), 0 0 0 8px rgba(37,211,102,.1); } }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-actions { justify-content: center; }
  .mockup-area { order: -1; }
  .mockup-float { display: none; }
  .feat-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; gap: 24px; }
  .steps-grid::before { display: none; }
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .sec-p { margin: 0 auto; }
}
@media (max-width: 640px) {
  .hero { padding: 90px 18px 40px; }
  .phone { width: 250px; }
  .screen-phone { width: 280px; }
  .cta-box { padding: 36px 24px; border-radius: 14px; }
  .feat-grid { grid-template-columns: 1fr; }
}