```css
:root {
  --primary-green: #32ad5c;
  --secondary-green: #6dcb8d;
  --text-black: #000000;
  --text-white: #ffffff;
  --bg-white: #ffffff;
  --max-width: 1280px;
}

/* =========================================================
   GLOBAL / BASE STYLES
   ========================================================= */

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-white);
  color: var(--text-black);
  line-height: 1.5;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}


/* =========================================================
   HEADER / NAVIGATION
   ========================================================= */

#header-section {
  background-color: #ffffff;
  width: 100%;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 64px;
}

/* Logo */

.logo img {
  width: 176px;
  height: auto;
  display: block;
}

/* Main navigation */

.nav-menu {
  display: flex;
  gap: 40px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: #000000;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--primary-green);
  text-decoration: underline;
}

/* Dropdown */

.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  min-width: 220px;
  z-index: 40;
  padding: 8px 0;
}

/* Small invisible bridge between the nav item and dropdown.
   This makes it easier to move the mouse into the dropdown. */
.dropdown-menu::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  width: 100%;
  height: 8px;
}

.dropdown-menu a {
  display: block;
  padding: 8px 14px;
  color: #000000;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background-color: #f6fef4;
  color: var(--primary-green);
}

/* Show dropdown when hovering over the parent */

.dropdown:hover .dropdown-menu {
  display: block;
}


/* =========================================================
   HEADER RESPONSIVE STYLES
   ========================================================= */

@media (max-width: 1024px) {
  .header-container {
    padding: 20px;
    flex-direction: column;
    gap: 20px;
  }

  .nav-menu {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .header-container {
    padding: 16px;
  }

  .nav-menu {
    gap: 12px 16px;
  }

  .nav-link {
    font-size: 15px;
  }

  .dropdown-menu {
    min-width: 200px;
  }

  .dropdown-menu a {
    font-size: 15px;
  }
}


/* =========================================================
   OUR MISSION
   ========================================================= */

#section-mission {
  background-color: var(--primary-green);
  padding: 60px 0 120px 0;
  display: flex;
  justify-content: center;
}

.mission-container {
  max-width: var(--max-width);
  width: 100%;
  padding: 0 64px;
  box-sizing: border-box;
}

.mission-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.mission-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-black);
  margin-bottom: 30px;
  text-align: center;
  width: 100%;
}

.mission-text-box {
  position: relative;
  width: 100%;
  max-width: 1138px;
  min-height: 275px;
  margin-bottom: 40px;
}

.mission-bg-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  border-radius: 20px;
  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.25);
}

.mission-text {
  position: relative;
  z-index: 1;
  padding: 30px 40px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-black);
}

.mission-text p {
  margin-bottom: 16px;
}

.mission-text p:last-child {
  margin-bottom: 0;
}

.mission-image-wrapper {
  width: 100%;
  max-width: 1152px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.25);
}

.mission-image {
  width: 100%;
  height: auto;
  display: block;
}


/* =========================================================
   PROJECTS
   ========================================================= */

#section-projects {
  background-color: var(--bg-white);
  padding: 80px 0;
}

.projects-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 64px;
  box-sizing: border-box;
}

.projects-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.projects-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 40px;
  color: var(--text-black);
}

.projects-description {
  width: 100%;
  max-width: 1137px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-black);
  margin-bottom: 60px;
  text-align: left;
}

.projects-description p {
  margin-bottom: 16px;
}

.projects-description p:last-child {
  margin-bottom: 0;
}

.project-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 314px;
  min-height: 67px;
  padding: 12px 20px;
  background-color: #ffffff;
  border: 3px solid var(--secondary-green);
  border-radius: 12px;
  color: var(--secondary-green);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.25);
  transition: all 0.3s ease;
}

.project-button:hover {
  background-color: var(--secondary-green);
  color: #ffffff;
}


/* =========================================================
   FEATURES / CARDS
   ========================================================= */

#section-features {
  background-color: var(--primary-green);
  padding: 120px 0;
}

.features-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 64px;
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 32px;
  box-sizing: border-box;
}

.feature-card {
  background-color: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  width: 362px;
  display: flex;
  flex-direction: column;
  box-shadow:
    0 6px 12px 0 rgba(0, 0, 0, 0.03),
    0 4px 8px 0 rgba(0, 0, 0, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.card-image {
  width: 100%;
  height: 240px;
  flex-shrink: 0;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  flex-grow: 1;
}

.card-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-black);
  text-transform: uppercase;
}

.card-text {
  font-size: 14px;
  line-height: 1.5;
  color: rgba(0, 0, 0, 0.55);
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-black);
  margin-top: auto;
  transition: color 0.2s ease;
}

.card-link:hover {
  color: var(--primary-green);
}


/* =========================================================
   FOOTER
   ========================================================= */

#section-footer {
  width: 100%;
  background-color: var(--primary-green);
}

.footer-bg {
  background-image: url('images/16d9611da4d6484879e65df3d2a4715b3ef22eec.png');
  background-size: cover;
  background-position: center;
  width: 100%;
  padding: 80px 0;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 64px;
  box-sizing: border-box;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 80px;
  gap: 40px;
}

.footer-cta h2 {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.2;
}

.footer-info {
  color: var(--text-white);
  font-size: 16px;
  line-height: 1.6;
  text-align: right;
}

.footer-info p {
  margin-bottom: 8px;
}

.footer-info p:last-child {
  margin-bottom: 0;
}


/* =========================================================
   RESPONSIVE — OUR MISSION
   ========================================================= */

@media (max-width: 1024px) {
  .features-container {
    flex-wrap: wrap;
    padding: 60px 20px;
  }

  .feature-card {
    width: 100%;
    max-width: 400px;
  }
}

@media (max-width: 768px) {
  .mission-container {
    padding: 0 20px;
  }

  .mission-title {
    font-size: 28px;
  }

  .mission-text-box {
    height: auto;
    min-height: 0;
  }

  .mission-bg-svg {
    display: none;
  }

  .mission-text-box {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 20px;
  }

  .mission-text {
    padding: 25px 24px;
  }

  .projects-container {
    padding: 0 20px;
  }

  .projects-title {
    font-size: 30px;
  }

  .projects-description {
    text-align: left;
  }

  .project-button {
    width: 100%;
    max-width: 314px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 40px;
  }

  .footer-info {
    text-align: left;
  }

  .footer-container {
    padding: 0 20px;
  }

  .footer-cta h2 {
    font-size: 40px;
  }
}
```