/* ==========================================================================
   特徴紹介セクション (1/5〜5/5)

   対象: トップページの左右交互レイアウト、特徴番号バッジ、
         画像切り替えボタン、clip-path による斜めカット
   関連HTML: front-page.php / src/index.html
   ブレークポイント: 1024px以下 → 1カラム表示、640px以下 → さらに縮小
   ========================================================================== */

.feature-section {
  background: #ecece3;
  padding: 2rem 0;
  width: 100%;
  position: relative;
  z-index: 1;
}

.feature-top {
  padding-top: 6rem;
}

.feature-bottom {
  padding-bottom: 6rem;
}

/* Feature Container - 2カラムグリッドレイアウト */
.feature-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.feature-left .feature-container {
  grid-template-columns: 1.6fr 1fr;
  grid-template-areas: "image content";
}

.feature-right {
  padding-left: 2rem;
}

.feature-right .feature-container {
  grid-template-columns: 1fr 1.6fr;
  grid-template-areas: "content image";
  gap: 0;
}

.feature-left .feature-image {
  grid-area: image;
}

.feature-left .feature-content {
  grid-area: content;
}

.feature-right .feature-image {
  grid-area: image;
}

.feature-right .feature-content {
  grid-area: content;
  margin-left: auto;
}

/* Feature Image */
.feature-image {
  height: 600px;
}

.feature-left .feature-image {
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0% 100%);
}

.feature-right .feature-image {
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Feature Image Link */
.feature-image-link {
  display: block;
  transition: opacity 0.3s ease;
}

.feature-image-link img {
  transition: transform 0.3s ease;
}

@media (hover: hover) {
  .feature-image-link:hover {
    opacity: 0.9;
  }

  .feature-image-link:hover img {
    transform: scale(1.02);
  }
}

/* Feature Image Wrapper (for image toggle) */
.feature-image-wrapper {
  position: relative;
  width: 100%;
  grid-area: image;
}

.feature-image-wrapper .feature-image {
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.feature-image-wrapper .feature-image:hover {
  opacity: 0.95;
}

/* Feature Image Icons (画像切り替えボタン) */
.feature-image-icons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  padding: 1rem 0;
  margin: 0 auto;
}

.feature-image-button {
  padding: 0.5rem 1rem;
  border: 1px solid #e0e0e0;
  background-color: #f8f8f8;
  color: #555;
  font-size: 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.feature-image-button:hover {
  background-color: var(--color-primary);
  color: white;
}

.feature-image-button.active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Feature Number */
.feature-number {
  margin-bottom: 1.5rem;
}

.feature-number span {
  display: inline-block;
  font-size: 0.8rem;
  color: #fff;
  padding: 0.2rem 0.4rem;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* Feature Title */
.feature-title {
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.feature-title .blue_span {
  color: var(--color-primary);
}

/* Feature Text */
.feature-text p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  color: #555;
}

.feature-text p:last-child {
  margin-bottom: 0;
}

.feature-text .blue_span {
  color: var(--color-primary);
}

.feature-text .font2rem {
  font-size: 1.2rem;
}

/* Feature Button */
.feature-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 0.8rem 2rem;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: #555;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.feature-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.feature-btn .material-symbols-outlined {
  font-size: 1rem;
}

/* Feature Spacer */
.feature-spacer {
  height: 6em;
  background: #ecece3;
}

/* ==========================================================================
   Feature Fullwidth (フルワイド画像 + テキストオーバーレイ)
   ========================================================================== */

.feature-fullwidth {
  position: relative;
  width: 100%;
  height: 80vh;
  min-height: 500px;
  overflow: hidden;
}

.feature-fullwidth .feature-fullwidth-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-fullwidth .feature-fullwidth-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.feature-fullwidth .feature-fullwidth-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  padding: 2rem;
}

.feature-fullwidth .feature-title {
  font-size: 2rem;
  font-weight: 400;
  color: #fff;
  margin-bottom: 2rem;
  line-height: 1.6;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.7), 0 0 4px rgba(0, 0, 0, 0.4);
}

.feature-fullwidth .feature-title .blue_span,
.feature-fullwidth .feature-text .blue_span {
  color: #b4d4e7;
}

.feature-fullwidth .feature-text p {
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.7), 0 0 4px rgba(0, 0, 0, 0.4);
  font-size: 1rem;
  line-height: 1.8;
}

.feature-fullwidth .feature-btn {
  margin-top: 2.5rem;
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  backdrop-filter: blur(4px);
}

.feature-fullwidth .feature-btn:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

/* ==========================================================================
   Feature Pair (2カラム横並び)
   ========================================================================== */

.feature-pair {
  background: #ecece3;
  padding: 6rem 2rem;
}

.feature-pair-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-pair-item {
  display: flex;
  flex-direction: column;
}

.feature-pair-item .feature-pair-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
}

.feature-pair-item .feature-pair-content {
  padding: 2rem 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.feature-pair-item .feature-text {
  margin-bottom: 3rem;
}

.feature-pair-item .feature-btn {
  margin-top: auto;
  align-self: flex-start;
}

.feature-pair-item .feature-title {
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.feature-pair-item .feature-title .blue_span {
  color: var(--color-primary);
}

.feature-pair-item .feature-text p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #555;
}

/* Feature Section Responsive */
@media (max-width: 1024px) {
  .feature-section {
    padding: 2.5rem 1rem;
  }

  .feature-number {
    text-align: center;
  }

  .feature-container {
    display: block;
    max-width: 100%;
  }

  .feature-container > .feature-image,
  .feature-container > .feature-image-wrapper {
    margin-bottom: 1.5rem;
  }

  .feature-left .feature-container,
  .feature-right .feature-container {
    grid-template-areas:
      "image"
      "content";
  }

  .feature-image {
    height: 400px;
  }

  .feature-left .feature-image,
  .feature-right .feature-image {
    clip-path: none;
    border-radius: 8px;
    overflow: hidden;
  }

  .feature-content {
    padding: 1.5rem;
  }

  .feature-title {
    font-size: 1.4rem;
    line-height: 1.5;
    text-align: center;
  }

  .feature-text {
    font-size: 0.9rem;
    line-height: 1.3;
  }

  .feature-image-wrapper {
    margin-bottom: 0;
  }

  .feature-image-icons {
    gap: 0.8rem;
    padding: 1rem 0;
    flex-wrap: wrap;
    justify-content: center;
  }

  .feature-right {
    padding-left: 0;
  }

  .feature-btn {
    display: flex;
    margin-left: auto;
    width: fit-content;
  }

  /* Feature Fullwidth responsive (tablet) */
  .feature-fullwidth {
    height: 60vh;
    min-height: 400px;
  }

  .feature-fullwidth .feature-title {
    font-size: 1.6rem;
  }

  .feature-fullwidth .feature-text p {
    font-size: 0.9rem;
  }
}

@media (max-width: 768px) {
  /* Feature Pair responsive (mobile: 1 column) */
  .feature-pair {
    padding: 4rem 1.5rem;
  }

  .feature-pair-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .feature-pair-item .feature-title {
    font-size: 1.4rem;
    text-align: center;
  }

  .feature-pair-item .feature-btn {
    display: flex;
    margin-left: auto;
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .feature-section {
    padding: 2rem 0.8rem;
  }

  .feature-image {
    height: 300px;
  }

  .feature-content {
    padding: 1rem 0.5rem;
  }

  .feature-number span {
    font-size: 0.9rem;
    padding: 0.15rem 0.35rem;
  }

  .feature-title {
    font-size: 1.2rem;
  }

  .feature-text {
    font-size: 0.9rem;
  }

  .feature-text p {
    line-height: 1.4;
  }

  .feature-image-icons {
    flex-wrap: wrap;
    gap: 0.6rem;
    max-width: 300px;
  }

  .feature-image-button {
    flex: 1 1 40%;
    font-size: 0.8rem;
    padding: 0.4rem 0.6rem;
  }

  /* Feature Fullwidth responsive (small mobile) */
  .feature-fullwidth {
    height: 60vh;
    min-height: 350px;
  }

  .feature-fullwidth .feature-title {
    font-size: 1.3rem;
  }

  .feature-fullwidth .feature-text p {
    font-size: 0.85rem;
    line-height: 1.6;
  }

  /* Feature Pair responsive (small mobile) */
  .feature-pair {
    padding: 3rem 1rem;
  }

  .feature-pair-item .feature-title {
    font-size: 1.2rem;
  }

  .feature-pair-item .feature-text p {
    font-size: 0.9rem;
  }
}