/* ===============================
   Portfolio Section
================================= */
.portfolio-preview {
  padding: 60px 20px;
  background-color: inherit; /* از body رنگ می‌گیرد */
  transition: background 0.3s ease;
}

.portfolio-preview h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 40px;
  font-weight: 600;
  color: inherit; /* رنگ متن با حالت روز/شب تغییر می‌کند */
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
}

/* Portfolio Item */
.portfolio-item {
  position: relative;
  overflow: hidden;
  border-radius: 0px;
  cursor: pointer;
  background-color: var(--card-bg-night);
  box-shadow: 0 10px 20px var(--card-shadow-night);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

body.day-mode .portfolio-item {
  background-color: var(--card-bg-day);
  box-shadow: 0 10px 20px var(--card-shadow-day);
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

.portfolio-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, background 0.3s ease;
}

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

.portfolio-card-overlay h3 {
  color: #fff;
  font-size: 1.5rem;
  text-align: center;
  padding: 0 15px;
}

/* Button */
.portfolio-preview .btn {
  display: inline-block;
  text-align: center;
  padding: 12px 30px;
  background: var(--primary-color-night);
  color: #fff;
  border-radius: 8px;
  font-weight: 500;
  transition: background 0.3s ease, transform 0.3s ease;
  margin-top: 30px;
}

body.day-mode .portfolio-preview .btn {
  background: var(--primary-color-day);
}

.portfolio-preview .btn:hover {
  background: var(--secondary-color-night);
  transform: translateY(-3px);
}

body.day-mode .portfolio-preview .btn:hover {
  background: var(--secondary-color-day);
}

/* Responsive Text Size */
@media (max-width: 768px) {
  .portfolio-preview h2 {
    font-size: 2rem;
  }

  .portfolio-card-overlay h3 {
    font-size: 1.2rem;
  }
}