:root {
  --ink: #1f2a24;
  --muted: #5d6b62;
  --line: #d9e2d9;
  --surface: #ffffff;
  --soft: #f4f8f2;
  --green: #276a3b;
  --green-dark: #17462a;
  --gold: #d69b2b;
  --blue: #195da8;
  --shadow: 0 18px 45px rgba(28, 54, 36, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Sans Bengali", "Nirmala UI", "Segoe UI", Arial, sans-serif;
  background: var(--soft);
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(1160px, calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--line);
  object-fit: cover;
}

.brand-name {
  display: block;
  color: var(--green-dark);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.2;
}

.brand-subtitle {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 11px;
}

.nav-links a:hover,
.nav-links a.active {
  background: #e8f1e8;
  color: var(--green-dark);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--green-dark);
  font-size: 22px;
}

.container {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: end;
  background:
    linear-gradient(90deg, rgba(17, 48, 29, 0.86) 0%, rgba(17, 48, 29, 0.58) 48%, rgba(17, 48, 29, 0.1) 100%),
    url("../img/bulding.jpg") center / cover;
}

.hero-inner {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 54px;
}

.hero-content {
  max-width: 760px;
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 12px;
  color: #f4d179;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(34px, 6vw, 70px);
  letter-spacing: 0;
}

.hero p {
  max-width: 650px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  padding: 12px 18px;
}

.btn-primary {
  background: var(--gold);
  color: #211800;
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.55);
  color: #ffffff;
}

.quick-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(1160px, calc(100% - 32px));
  margin: -34px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.quick-info div {
  min-height: 108px;
  background: var(--surface);
  padding: 22px;
}

.quick-info span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.quick-info strong {
  display: block;
  margin-top: 6px;
  color: var(--green-dark);
  font-size: 20px;
  line-height: 1.25;
}

.section {
  padding: 82px 0;
}

.section-title {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-title p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

h2 {
  color: var(--green-dark);
  font-size: clamp(28px, 4vw, 44px);
}

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 34px;
  align-items: center;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-pad {
  padding: 30px;
}

.feature-list {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  border-left: 4px solid var(--gold);
  background: #fbfdf9;
  padding: 14px 16px;
}

.feature-list strong {
  display: block;
  color: var(--green-dark);
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.photo-grid img,
.feature-photo {
  width: 100%;
  height: 260px;
  border-radius: 8px;
  object-fit: cover;
}

.feature-photo {
  height: 420px;
}

.page-hero {
  background:
    linear-gradient(90deg, rgba(23, 70, 42, 0.9), rgba(25, 93, 168, 0.62)),
    url("../img/office-1.jpg") center / cover;
  color: #ffffff;
  padding: 86px 0;
}

.page-hero h1 {
  max-width: 850px;
}

.page-hero p {
  max-width: 720px;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

.services-hero {
  background:
    linear-gradient(90deg, rgba(23, 70, 42, 0.92), rgba(214, 155, 43, 0.54)),
    url("../img/office-3.jpg") center / cover;
}

.gallery-hero {
  background:
    linear-gradient(90deg, rgba(23, 70, 42, 0.9), rgba(25, 93, 168, 0.58)),
    url("../img/office-2.jpg") center / cover;
}

.gallery-status {
  min-height: 28px;
  margin: -12px 0 22px;
  color: var(--green);
  font-weight: 800;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.gallery-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 14px 30px rgba(28, 54, 36, 0.1);
  cursor: zoom-in;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.gallery-card:hover,
.gallery-card:focus {
  box-shadow: 0 18px 38px rgba(28, 54, 36, 0.16);
  outline: none;
  transform: translateY(-2px);
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.gallery-card div {
  padding: 18px 20px 20px;
}

.gallery-card h3 {
  color: var(--green-dark);
  font-size: 22px;
}

.gallery-card p {
  margin: 7px 0 0;
  color: var(--muted);
  font-weight: 700;
}

.gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 14, 9, 0.94);
  padding: 28px;
}

.gallery-lightbox.open {
  display: flex;
}

.gallery-lightbox img {
  max-width: min(1100px, 92vw);
  max-height: 82vh;
  border-radius: 8px;
  object-fit: contain;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.38);
}

.gallery-lightbox-close {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  font-family: Arial, sans-serif;
  font-weight: 800;
  transition: transform 150ms ease, background 150ms ease, color 150ms ease;
}

.gallery-lightbox-close {
  top: 18px;
  right: 18px;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.64);
  font-size: 0;
  padding: 0;
  box-shadow: none;
}

.gallery-lightbox-close::before,
.gallery-lightbox-close::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
}

.gallery-lightbox-close::before {
  transform: rotate(45deg);
}

.gallery-lightbox-close::after {
  transform: rotate(-45deg);
}

.gallery-lightbox-arrow {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  top: 50%;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.64);
  cursor: pointer;
  font-size: 0;
  padding: 0;
  box-shadow: none;
  transition: transform 150ms ease, background 150ms ease, color 150ms ease;
  transform: translateY(-50%);
}

.gallery-lightbox-arrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
}

.gallery-lightbox-prev {
  left: 18px;
}

.gallery-lightbox-prev::before {
  transform: translateX(2px) rotate(-135deg);
}

.gallery-lightbox-next {
  right: 18px;
}

.gallery-lightbox-next::before {
  transform: translateX(-2px) rotate(45deg);
}

.gallery-lightbox-arrow:hover,
.gallery-lightbox-arrow:focus,
.gallery-lightbox-close:hover,
.gallery-lightbox-close:focus {
  outline: none;
}

.gallery-lightbox-arrow:hover,
.gallery-lightbox-arrow:focus {
  background: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.86);
  border-color: rgba(255, 255, 255, 0.42);
  transform: translateY(-50%) scale(1.06);
}

.gallery-lightbox-close:hover,
.gallery-lightbox-close:focus {
  background: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.86);
  border-color: rgba(255, 255, 255, 0.42);
  transform: scale(1.06);
}

.gallery-lightbox-caption {
  position: absolute;
  right: 28px;
  bottom: 22px;
  left: 28px;
  color: #ffffff;
  font-weight: 800;
  text-align: center;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 210px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 24px;
  box-shadow: 0 12px 28px rgba(28, 54, 36, 0.08);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.service-card:hover {
  border-color: rgba(39, 106, 59, 0.32);
  box-shadow: 0 18px 40px rgba(28, 54, 36, 0.15);
  transform: translateY(-4px);
}

.service-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #e8f1e8;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
  transition: background 160ms ease, color 160ms ease;
}

.service-card:hover span {
  background: var(--gold);
  color: #211800;
}

.service-card h3 {
  margin-top: 18px;
  color: var(--green-dark);
  font-size: 21px;
}

.service-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.service-highlight {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
  border-radius: 8px;
  background: var(--green-dark);
  color: #ffffff;
  padding: 30px;
}

.service-highlight h2 {
  color: #ffffff;
  font-size: 30px;
}

.service-highlight p:last-child {
  max-width: 720px;
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.82);
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 28px;
}

.contact-list {
  display: grid;
  gap: 16px;
  margin: 0;
  margin-top: 18px;
}

.contact-list dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.contact-list dd {
  margin: 4px 0 0;
  color: var(--green-dark);
  font-size: 17px;
  font-weight: 800;
}

.contact-form {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 800;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  padding: 12px 14px;
}

.field textarea {
  min-height: 130px;
  resize: vertical;
}

.form-note {
  min-height: 24px;
  margin: 0;
  color: var(--green);
  font-weight: 700;
}

.map-section {
  margin: 34px 0 -82px;
}

.map-section iframe {
  display: block;
  width: 100%;
  height: 450px;
  border: 0;
}

.legal-content {
  max-width: 900px;
}

.legal-content h2 {
  margin-top: 34px;
  font-size: 26px;
}

.legal-content p,
.legal-content li {
  color: var(--muted);
}

.site-footer {
  background: var(--green-dark);
  color: #ffffff;
  padding: 40px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: start;
}

.footer-grid p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.footer-credit {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.footer-credit a {
  color: #f4d179;
  font-weight: 800;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  justify-content: flex-end;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

@media (max-width: 850px) {
  .nav-wrap {
    min-height: 68px;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 68px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    padding: 8px;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 13px 14px;
  }

  .hero {
    min-height: 680px;
  }

  .quick-info,
  .grid-2,
  .contact-layout,
  .service-grid,
  .gallery-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .quick-info {
    margin-top: 0;
    border-radius: 0;
    width: 100%;
  }

  .photo-grid {
    grid-template-columns: 1fr;
  }

  .feature-photo {
    height: 300px;
  }

  .service-highlight {
    align-items: flex-start;
    flex-direction: column;
  }

  .map-section iframe {
    height: 340px;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .brand-name {
    font-size: 14px;
  }

  .brand-subtitle {
    display: none;
  }

  .hero-inner,
  .section {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .hero p,
  .page-hero p {
    font-size: 16px;
  }

  .panel-pad {
    padding: 22px;
  }

  .gallery-lightbox-arrow {
    width: 24px;
    height: 24px;
  }

  .gallery-lightbox-prev {
    left: 10px;
  }

  .gallery-lightbox-next {
    right: 10px;
  }
}