#portfolio {
  background-color: #eaeaea;
}

/* =========================
   Portfolio
========================= */

#portfolio-list {
  width: 100%;
  max-width: 1200px;
}

/* クラスごとのグループ */

.portfolio-group {
  width: 100%;
  margin-top: 50px;
}

/* CLASS */

.portfolio-group h3 {
  margin-bottom: 20px;
  margin-left: 70px;

  font-size: 28px;
  font-weight: bold;

  text-align: left;
}

/* スライダー */

.portfolio-slider {
  display: flex;
  align-items: center;

  gap: 20px;

  width: 100%;
}

/* ← → */

.portfolio-arrow {
  flex-shrink: 0;

  width: 50px;
  height: 50px;

  border: none;
  border-radius: 50%;

  background-color: #ffffff;

  font-size: 24px;

  cursor: pointer;

  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);

  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease;
}

.portfolio-arrow:hover {
  transform: scale(1.1);

  background-color: #222222;
  color: #ffffff;
}

/* 作品一覧 */

.portfolio-game-list {
  display: flex;

  gap: 20px;

  flex: 1;

  overflow: hidden;

  scroll-behavior: smooth;
}

/* 作品 */

.portfolio-item {
  flex: 0 0 calc((100% - 40px) / 3);

  padding: 10px;

  background-color: #ffffff;

  border-radius: 16px;

  text-decoration: none;

  color: #222222;

  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);

  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.portfolio-item:hover {
  transform: translateY(-5px);

  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* 作品画像 */

.portfolio-item img {
  display: block;

  width: 100%;

  aspect-ratio: 16 / 9;

  object-fit: cover;

  border-radius: 10px;
}

/* 作品タイトル */

.portfolio-item h4 {
  margin: 12px 5px 5px;

  font-size: 18px;

  text-align: left;
}

/* 説明 */

.portfolio-item p {
  margin: 0 5px 8px;

  font-size: 14px;

  line-height: 1.5;

  text-align: left;

  color: #666666;
}

/* =========================
   スマホ
========================= */

@media (max-width: 700px) {
  /* =========================
     Portfolio
  ========================= */

  .portfolio-group h3 {
    font-size: 24px;
    margin-left: 50px;
  }

  .portfolio-slider {
    gap: 10px;
  }

  .portfolio-arrow {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .portfolio-item {
    flex: 0 0 100%;
  }
}

.portfolio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 5px;
}

.portfolio-tag {
  display: inline-flex;
  align-items: center;

  padding: 4px 9px;

  border-radius: 20px;

  background-color: #eeeeee;
  color: #555555;

  font-size: 12px;
  font-weight: bold;

  line-height: 1;
}