/* ==========================
   GLOBAL STYLES
   ========================== */
body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #222;
  background-color: #f9fafb;
}

/* Container */
.container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* ==========================
   HERO SECTION
   ========================== */
.hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #fff;
  padding: 5rem 1rem 3rem 1rem;
  text-align: center;
  animation: fadeIn 1s ease-in;
  border-bottom: 3px solid #0ea5e9;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.hero nav ul {
  list-style: none;
  padding: 0;
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.hero nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 9999px;
  transition: background 0.3s ease;
}

.hero nav a:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* ==========================
   SECTIONS
   ========================== */
section {
  padding: 3rem 0;
}

.overview-section {
  background: #f8fafc; /* very light grey/blue background */
  color: #0f172a;
  text-align: center;
  border-top: 2px solid #e2e8f0;
  border-bottom: 2px solid #e2e8f0;
}

.overview-section h2 {
  font-size: 2.4rem;
  margin-bottom: 1rem;
  color: #0ea5e9; /* accent blue */
}

.overview-section p {
  font-size: 1.3rem;
  max-width: 850px;
  margin: 1rem auto;
  line-height: 1.9;
}

.content-section h2 {
  font-size: 1.8rem;
  margin-bottom: 0.1rem;
  color: #0f172a;
  border-left: 5px solid #0ea5e9;
  padding-left: 0.5rem;
}

.project-details {
  list-style: none;
  padding: 0;
  margin-bottom: 2rem;
}

.project-details li {
  margin-bottom: 0.6rem;
}

/* ==========================
   IMAGES
   ========================== */
img {
  max-width: 800px;   /* standard size for single visuals */
  width: 100%;
  height: auto;
  display: block;
  margin: 2.5rem auto;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
  transition: transform 0.3s ease;
}

img:hover {
  transform: scale(1.02);
}

.image-caption {
  text-align: center;
  font-size: 1.15rem;
  font-weight: 500;
  color: #334155;
  margin-top: -0.5rem;
  margin-bottom: 3rem;
  line-height: 1.6;
}


/* ==========================
   SIDE-BY-SIDE VISUALS
   ========================== */
.side-by-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem; /* more gap between visuals */
  align-items: start;
  margin-top: 3rem;
}

.side-by-side img {
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.side-by-side p {
  text-align: center;
  font-size: 1.1rem;  /* bigger caption */
  font-weight: 500;
  margin-top: 0.8rem;
  color: #334155;
}

/* Responsive for small screens */
@media (max-width: 768px) {
  .side-by-side {
    grid-template-columns: 1fr; /* stack vertically */
  }
}

/* ==========================
   FOOTER
   ========================== */
footer {
  background: #0f172a;
  color: #cbd5e1;
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.9rem;
  margin-top: 3rem;
}

/* ==========================
   ANIMATIONS
   ========================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-15px); }
  to { opacity: 1; transform: translateY(0); }
}