:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --card: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 40px -10px rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', 'Noto Sans Bengali', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.header {
  background: white; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 20px; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon { display: flex; align-items: center; }
.logo-icon img { width: 42px; height: 42px; border-radius: 10px; object-fit: cover; display: block; }
.logo strong { display: block; font-size: 18px; }
.logo small { color: var(--muted); font-size: 12px; }
.nav { display: flex; gap: 24px; }
.nav a { text-decoration: none; color: var(--text); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.lang-toggle {
  display: flex;
  background: #f1f5f9;
  border-radius: 30px;
  padding: 3px;
  gap: 2px;
}
.lang-btn {
  background: transparent;
  border: none;
  color: #64748b;
  padding: 6px 14px;
  border-radius: 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.2s;
}
.lang-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
}
.lang-btn:hover:not(.active) {
  color: var(--text);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 22px; border-radius: 10px; font-weight: 600; text-decoration: none;
  transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* Floating WhatsApp Button (bottom-right) */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background: #25d366;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
  z-index: 999;
  transition: all 0.25s ease;
  text-decoration: none;
}
.floating-whatsapp:hover {
  background: #1da851;
  transform: scale(1.08);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.55);
}

.hero { 
  padding: 60px 0 80px; 
  background: linear-gradient(165deg, #f0fdfa 0%, #ecfdf5 40%, #f8fafc 100%);
}
.hero-grid { 
  display: grid; 
  grid-template-columns: 1fr 1.15fr; 
  gap: 48px; 
  align-items: center; 
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ccfbf1; 
  color: #0f766e;
  padding: 7px 16px; 
  border-radius: 30px; 
  font-size: 13px; 
  font-weight: 600; 
  margin-bottom: 20px;
  border: 1px solid #99f6e4;
}
.hero h1 { 
  font-size: 40px; 
  line-height: 1.18; 
  margin-bottom: 16px; 
  font-weight: 800; 
  letter-spacing: -0.6px;
  color: #0f172a;
}
.hero-sub { 
  font-size: 16.5px; 
  color: #64748b; 
  margin-bottom: 28px; 
  max-width: 480px; 
  line-height: 1.7; 
}
.hero-cta { 
  display: flex; 
  flex-wrap: nowrap; 
  gap: 12px; 
  margin-bottom: 40px; 
  align-items: center; 
}
.hero-cta .btn {
  white-space: nowrap;
  height: 50px;
  padding: 0 24px;
  font-size: 15px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
}
.download-note {
  font-size: 13px;
  color: #64748b;
  margin-bottom: 24px;
  margin-top: -8px;
}
.hero-stats { 
  display: flex; 
  gap: 36px; 
}
.hero-stats strong { 
  display: block; 
  font-size: 20px; 
  color: var(--primary); 
  font-weight: 700;
}
.hero-stats span { 
  font-size: 13px; 
  color: #94a3b8; 
}
.hero-image {
  position: relative;
}
.main-shot {
  width: 100%; 
  border-radius: 20px; 
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0,0,0,0.04);
  border: none;
  transition: transform 0.4s ease;
}
.main-shot:hover {
  transform: translateY(-4px);
}

.section { padding: 80px 0; }
.section-title { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--muted); max-width: 600px; margin: 0 auto 48px; }

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px;
}
.feature-card {
  background: white; padding: 28px; border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid #f1f5f9;
}
.feature-card .icon { font-size: 32px; margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 15px; }

.shop-types {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}
.shop-types span {
  background: white; padding: 10px 18px; border-radius: 30px;
  font-weight: 500; border: 1px solid #e2e8f0; font-size: 14px;
}

.screenshot-group { margin-bottom: 48px; }
.screenshot-group h3 { font-size: 20px; margin-bottom: 16px; color: var(--primary-dark); }
.shots {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px;
}
.shots img {
  width: 100%; border-radius: 12px; box-shadow: var(--shadow);
  border: 1px solid #e2e8f0; transition: transform 0.3s;
}
.shots img:hover { transform: scale(1.02); }

.pricing { background: #f0fdfa; }
.price-card {
  max-width: 440px; margin: 0 auto; background: white;
  padding: 40px; border-radius: 20px; text-align: center;
  box-shadow: var(--shadow); position: relative;
}
.price-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: #f59e0b; color: white; padding: 4px 16px; border-radius: 20px; font-size: 13px; font-weight: 600;
}
.price-card h3 { font-size: 26px; margin: 16px 0 8px; }
.price { color: var(--muted); margin-bottom: 24px; }
.price-card ul { list-style: none; text-align: left; margin-bottom: 28px; }
.price-card li { padding: 8px 0; font-size: 15px; }

.contact-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px;
}
.contact-card {
  background: white; padding: 28px; border-radius: var(--radius);
  text-align: center; text-decoration: none; color: inherit;
  box-shadow: var(--shadow); transition: transform 0.2s;
}
.contact-card:hover { transform: translateY(-4px); }
.contact-card.whatsapp { border: 2px solid #25d366; }
.c-icon { font-size: 36px; margin-bottom: 12px; }
.contact-card h3 { margin-bottom: 6px; }
.contact-card p { font-weight: 600; color: var(--primary); }

.footer { background: #0f172a; color: #94a3b8; padding: 50px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer strong { color: white; font-size: 18px; display: block; margin-bottom: 10px; }
.footer h4 { color: white; margin-bottom: 12px; }
.copyright { text-align: center; padding-top: 20px; border-top: 1px solid #1e293b; font-size: 14px; }


/* ========== Animations ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.feature-card {
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -12px rgba(0,0,0,0.12);
}

.shop-types span {
  transition: opacity 0.5s ease, transform 0.5s ease, background 0.2s, border-color 0.2s, color 0.2s;
}
.shop-types span:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.contact-card {
  transition: opacity 0.7s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.contact-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px -8px rgba(0,0,0,0.12);
}

.price-card {
  transition: opacity 0.7s ease, transform 0.3s ease;
}
.price-card:hover {
  transform: translateY(-4px);
}

.shots img {
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease;
}
.shots img:hover {
  transform: scale(1.03);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.15);
}

.btn {
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.btn:hover {
  transform: translateY(-2px);
}

.floating-whatsapp {
  animation: pulse-wa 2.5s infinite;
}
@keyframes pulse-wa {
  0%, 100% { box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45); }
  50% { box-shadow: 0 6px 28px rgba(37, 211, 102, 0.7); }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav { display: none; }
  .hero h1 { font-size: 28px; }
  .hero-cta { flex-wrap: wrap; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .header-right .btn-primary { display: none; }
  .lang-toggle { margin-left: auto; }
  .floating-whatsapp { width: 54px; height: 54px; bottom: 18px; right: 18px; }
  .main-shot { transform: none !important; }
}