body {
  font-family: 'Open Sans', sans-serif;
  background-color: #D5F1E4;
  color: #0B3C2E;
  margin: 0;
  padding: 0;
  line-height: 1.8;
  scroll-behavior: smooth;
}

/* Header */
header {
  background-color: #0B3C2E;
  color: white;
  padding: 2rem 1.5rem 1rem;
  text-align: center;
  border-bottom: 4px solid #6ECF96;
}

header h1 {
  font-size: 2.5rem;
  margin: 0.5rem 0;
  line-height: 1.2;
  letter-spacing: 0.5px;
}

header p {
  font-size: 1.2rem;
  margin: 0.5rem 0 1rem;
  opacity: 0.9;
  line-height: 1.2;
}

/* Navigation */
nav {
  margin-top: 1rem;
}

nav a {
  margin: 0 1rem;
  color: #6ECF96;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

nav a:hover,
nav a:focus {
  color: #3A8D5A;
  text-decoration: underline;
  outline: none;
}

/* Banner */
.banner-container {
  width: 100%;
  overflow: hidden;
  position: relative;
}

.banner-img {
  width: 100%;
  height: 330px;
  object-fit: cover;
  display: block;
  border-bottom: 5px solid #3A8D5A;
}

.banner-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  text-align: center;
  padding: 0 1rem;
  max-width: 90%;
}

.banner-text h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.banner-text .subtitle {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.banner-text .branding-statement {
  font-size: 1rem;
  line-height: 1.4;
}

/* Section Layout */
.section {
  max-width: 900px;
  margin: 2rem auto 4rem;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

h2 {
  color: #1A603B;
  border-bottom: 2px solid #3A8D5A;
  padding-bottom: 0.3rem;
  margin-bottom: 1rem;
  line-height: 1.8;
  letter-spacing: 0.5px;
  font-size: 2rem;
}

ul {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Cards */
.card {
  background-color: #fff;
  border: 2px solid #6ECF96;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 10px rgba(11, 60, 46, 0.08);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
  box-shadow: 0 6px 14px rgba(11, 60, 46, 0.15);
  transform: translateY(-4px);
}

.card h3 {
  color: #0B3C2E;
  margin-bottom: 0.5rem;
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.card p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.card p.tags {
  font-size: 0.9rem;
  color: #3A8D5A;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #6ECF96;
  color: #0B3C2E;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.2s ease;
  cursor: pointer;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.btn:hover,
.btn:focus {
  background-color: #3A8D5A;
  transform: translateY(-2px);
  outline: none;
  box-shadow: 0 0 0 3px #6ECF96;
}

/* Footer */
footer {
  background-color: #3A8D5A;
  color: white;
  text-align: center;
  padding: 1.25rem;
  font-size: 0.95rem;
  border-top: 4px solid #0B3C2E;
  margin-top: 3rem;
}

footer a {
  color: #e0f2e9;
  margin-right: 1rem;
  transition: color 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

footer a:last-child {
  margin-right: 0;
}

footer a:hover,
footer a:focus {
  color: #a1d6b6;
  outline: none;
}

/* Profile Image */
.profile-img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto 1rem auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Forms */
form input,
form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  margin-bottom: 1rem;
}

form label {
  font-weight: bold;
  color: #0B3C2E;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Infographic and Graph */
.project-media {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.project-media img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-media img:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.project-media .caption {
  font-size: 0.9rem;
  color: #4a4a4a;
  text-align: center;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Project Media Buttons */
.project-media a.btn {
  display: inline-block;
}

/* Responsive layout for media */
@media (min-width: 768px) {
  .project-media {
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .project-media > div {
    flex: 1;
    max-width: 48%;
    margin-right: 1rem;
  }
}

/* Responsive Tweaks */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .banner-text h1 {
    font-size: 1.8rem;
  }

  .banner-text .subtitle {
    font-size: 1rem;
  }

  .banner-text .branding-statement {
    font-size: 0.95rem;
  }

  nav a {
    display: inline-block;
    margin: 0.5rem;
  }

  .section {
    padding: 0 1rem;
  }

  .banner-img {
    height: 220px;
  }

  .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    margin-right: 0.3rem;
  }
}

@media (max-width: 480px) {
  .card {
    margin-bottom: 1.2rem;
    padding: 1rem;
  }

  .banner-text h1 {
    font-size: 1.5rem;
  }

  .banner-text .subtitle,
  .banner-text .branding-statement {
    font-size: 0.9rem;
  }

  .banner-img {
    height: 160px;
  }
}