:root {
  color-scheme: light;
  --ink: #143b35;
  --ink-soft: #385b54;
  --muted: #6c817c;
  --green: #176d59;
  --green-deep: #104e43;
  --mint: #dceddf;
  --paper: #f7f9f7;
  --white: #fff;
  --line: #e4ece7;
  --gold: #e3b766;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans Bengali', 'Hind Siliguri', sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; border-radius: 5px; }

.container { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.topline { background: var(--green-deep); color: #e9f2ed; font: 500 12px/1.4 sans-serif; letter-spacing: .02em; }
.topline-inner { min-height: 38px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topline a { display: inline-flex; align-items: center; gap: 8px; }
.topline svg, .button svg { width: 16px; height: 16px; fill: currentColor; }

.site-header { position: relative; z-index: 2; background: rgba(247, 249, 247, .9); border-bottom: 1px solid rgba(20, 59, 53, .06); }
.header-inner { min-height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 15px; background: var(--green); box-shadow: 0 8px 20px rgba(23, 109, 89, .17); }
.brand-mark svg { width: 26px; height: 26px; fill: var(--white); }
.brand-copy { display: grid; line-height: 1.35; }
.brand-copy strong { font-size: 18px; font-weight: 700; }
.brand-copy small { color: var(--muted); font-size: 13px; }
nav { display: flex; align-items: center; gap: 34px; color: var(--ink-soft); font-size: 15px; font-weight: 600; }
nav a:hover { color: var(--green); }

.hero { position: relative; overflow: hidden; padding: 84px 0 96px; background: linear-gradient(112deg, #f7f9f7 0%, #f1f6f0 58%, #eaf3ed 100%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(330px, .8fr); gap: 72px; align-items: center; }
.hero-copy { max-width: 640px; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 22px; color: var(--green); font: 800 11px/1.3 sans-serif; letter-spacing: .16em; }
.eyebrow span { width: 24px; height: 2px; display: inline-block; background: var(--gold); }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-size: clamp(38px, 5.3vw, 66px); font-weight: 700; line-height: 1.21; letter-spacing: -.04em; }
h1 em { color: var(--green); font-style: normal; }
.english-name { max-width: 570px; margin-bottom: 18px; color: #618077; font: 600 15px/1.6 sans-serif; }
.hero-text { max-width: 480px; margin-bottom: 29px; color: var(--ink-soft); font-size: 19px; }
.hero-actions, .banner-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 13px; }
.button { min-height: 48px; display: inline-flex; justify-content: center; align-items: center; gap: 9px; padding: 0 21px; border: 1px solid transparent; border-radius: 10px; font-size: 15px; font-weight: 700; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--green); color: var(--white); box-shadow: 0 8px 20px rgba(23, 109, 89, .16); }
.button-primary:hover { background: var(--green-deep); }
.button-secondary { border-color: #d7e4dc; background: rgba(255,255,255,.62); color: var(--ink); }
.button-secondary:hover { background: var(--white); }

.contact-card { position: relative; padding: 30px 30px 23px; border: 1px solid rgba(23, 109, 89, .09); border-radius: 20px; background: rgba(255, 255, 255, .91); box-shadow: 0 22px 65px rgba(28, 70, 59, .1); }
.card-heading { display: flex; align-items: center; gap: 14px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.card-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; background: #edf5ef; }
.card-icon svg { width: 24px; height: 24px; fill: var(--green); }
.card-kicker { margin: 0 0 1px; color: #7a938b; font: 800 9px/1.4 'Manrope', sans-serif; letter-spacing: .16em; }
.card-heading h2 { margin: 0; font-size: 23px; line-height: 1.3; }
.contact-row { display: grid; grid-template-columns: 72px 1fr; gap: 10px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.contact-label { color: var(--muted); font-size: 14px; }
.contact-row a, .contact-row > span:last-child { color: var(--ink); font: 600 14px/1.65 'Noto Sans Bengali', 'Hind Siliguri', sans-serif; overflow-wrap: anywhere; }
.contact-row a:hover { color: var(--green); }
.contact-row .email-link { font-size: 12px; }
.contact-row-last { border-bottom: 0; padding-bottom: 12px; }
.card-note { margin: 4px 0 0; padding: 13px 15px; border-radius: 9px; background: #f3f7f3; color: #627a72; font-size: 13px; line-height: 1.55; }
.hero-orb { position: absolute; border: 1px solid rgba(23,109,89,.07); border-radius: 50%; pointer-events: none; }
.orb-one { width: 430px; height: 430px; right: -165px; top: -210px; }
.orb-two { width: 580px; height: 580px; right: -240px; top: -286px; }

.about-section { padding: 76px 0 80px; background: var(--white); }
.about-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 64px; align-items: start; }
.eyebrow-muted { margin-bottom: 14px; color: #7c918b; }
.about-grid h2, .contact-banner h2 { margin-bottom: 0; font-size: 34px; line-height: 1.3; }
.about-copy { max-width: 650px; padding-top: 6px; }
.about-copy > p:first-child { margin-bottom: 19px; color: #405e57; font-size: 19px; line-height: 1.8; }
.about-copy strong { color: var(--green-deep); }
.about-footnote { margin-bottom: 0; padding-left: 15px; border-left: 2px solid var(--gold); color: #71827d; font-size: 14px; }

.contact-section { padding: 72px 0; background: var(--white); }
.contact-banner { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 38px 44px; border-radius: 20px; background: var(--green-deep); color: var(--white); }
.eyebrow-light { margin-bottom: 10px; color: #c5dfd2; }
.contact-banner h2 { font-size: 30px; }
.contact-banner > div:first-child > p:last-child { margin: 8px 0 0; color: #d2e4dc; font-size: 15px; }
.banner-actions { justify-content: flex-end; }
.button-light { background: var(--white); color: var(--green-deep); }
.button-light:hover { box-shadow: 0 6px 18px rgba(0,0,0,.15); }
.banner-email { padding: 9px 4px; color: #eef6f1; font-size: 14px; font-weight: 600; }
.banner-email span { margin-left: 5px; color: var(--gold); }
.site-footer { padding: 24px 0; background: #0d4037; color: #eaf2ed; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-inner strong { font-size: 14px; }
.footer-inner p { margin: 2px 0 0; color: #a9c3b8; font: 500 11px/1.6 sans-serif; }
.footer-inner > span { color: #a9c3b8; font-size: 12px; }

@media (max-width: 800px) {
  .hero { padding: 64px 0 70px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-copy { max-width: 700px; }
  .contact-card { max-width: 540px; }
  .about-grid { grid-template-columns: 1fr; gap: 19px; }
  .about-section, .contact-section { padding: 58px 0; }
  .contact-banner { align-items: flex-start; flex-direction: column; padding: 32px; }
  .banner-actions { justify-content: flex-start; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .container { width: min(100% - 32px, 1120px); }
  .topline-inner { min-height: 36px; font-size: 10px; }
  .topline a { gap: 5px; }
  .topline svg { width: 13px; height: 13px; }
  .header-inner { min-height: 72px; }
  .brand { gap: 9px; }
  .brand-mark { width: 39px; height: 39px; border-radius: 12px; }
  .brand-mark svg { width: 22px; height: 22px; }
  .brand-copy strong { font-size: 15px; }
  .brand-copy small { font-size: 11px; }
  nav { gap: 16px; font-size: 13px; }
  .hero { padding: 48px 0 55px; }
  .eyebrow { margin-bottom: 17px; font-size: 9px; }
  h1 { font-size: clamp(34px, 10vw, 46px); }
  .english-name { font-size: 12px; }
  .hero-text { font-size: 16px; }
  .button { min-height: 45px; padding-inline: 16px; font-size: 14px; }
  .contact-card { padding: 23px 20px 18px; border-radius: 16px; }
  .contact-row { grid-template-columns: 58px 1fr; gap: 8px; padding: 14px 0; }
  .contact-row a, .contact-row > span:last-child { font-size: 12px; }
  .contact-row .email-link { font-size: 10px; }
  .about-grid h2, .contact-banner h2 { font-size: 27px; }
  .about-copy > p:first-child { font-size: 16px; }
  .contact-banner { padding: 27px 22px; border-radius: 16px; }
  .banner-actions { align-items: flex-start; flex-direction: column; gap: 7px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}