/* ---------- Base ---------- */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #111;
  background: #fff;
}

/* ---------- Header ---------- */

.site-header {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.15em;
}

nav a {
  margin-left: 24px;
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
  color: #666;
}

nav a:hover {
  color: #000;
}

/* ---------- Layout ---------- */

.container {
  max-width: 1200px;
  margin: 100px auto;
  padding: 0 20px;
}

.page-title {
  font-size: 18px;
  font-weight: 300;
  margin-bottom: 80px;
}

/* ---------- Portfolio Grid ---------- */

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

/* ---------- Portfolio Item ---------- */

.portfolio-item {
  position: relative;
  overflow: hidden;
}

.portfolio-item img {
  width: 100%;
  display: block;
  transition: opacity 0.4s ease;
}

/* Overlay text */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.6);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.overlay span {
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Hover effect */
.portfolio-item:hover img {
  opacity: 0.6;
}

.portfolio-item:hover .overlay {
  opacity: 1;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .container {
    margin: 60px auto;
  }
}