/* ==========================================================================
   Project: Case Study
   ========================================================================== */

.p-case-study {
  position: relative;
  padding: var(--section-padding-sp) 0;
  background-color: var(--color-white);
  overflow: hidden;
}

.p-case-study::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(#d5f9f7 0%, #fff6d3 100%);
  opacity: 0.29;
  pointer-events: none;
}

.p-case-study__inner {
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .p-case-study {
    padding: var(--section-padding-pc) 0;
  }
}

.p-case-study__head {
  margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
  .p-case-study__head {
    margin-bottom: var(--space-xl);
  }
}

.p-case-study__control {
  width: 100%;
}

/* SP: 最新3件リスト（カルーセルは非表示） */
.p-case-study__carousel {
  display: none;
}

.p-case-study__list-sp {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.p-case-study__list-sp-item {
  padding: clamp(20px, 4vw, 32px);
  border-radius: 2px;
  background-color: var(--color-white);
  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
  .p-case-study__carousel {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    column-gap: clamp(10px, 2vw, 20px);
    row-gap: var(--space-sm);
    align-items: center;
  }

  .p-case-study__list-sp {
    display: none;
  }
}

.p-case-study__frame {
  grid-column: 2;
  grid-row: 1;
  padding: clamp(20px, 4vw, 32px);
  border-radius: 2px;
  background-color: var(--color-white);
  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.1);
}

.p-case-study__slider {
  overflow: hidden;
}

.p-case-study__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.p-case-study__col--visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}
@media (max-width: 767px) {
  .p-case-study__col--visual {
    gap: var(--space-md);
  }
}
.p-case-study__body {
  display: grid;
  gap: var(--space-md);
  align-items: start;
}

@media (min-width: 768px) {
  .p-case-study__body {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.85fr);
    gap: clamp(24px, 4vw, 48px);
  }
}

/* Header */
.p-case-study__client {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(20px, 3.2vw, 26px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--color-primary-dark);
}

.p-case-study__client a {
  transition: opacity var(--transition-base);
}

@media (hover: hover) {
  .p-case-study__client a:hover {
    opacity: 0.7;
  }
}

.p-case-study__header .p-cs-hero__title {
  margin: var(--space-xs) 0 0;
  font-family: var(--font-serif);
  font-size: clamp(14px, 2.4vw, 18px);
  font-weight: 500;
  line-height: 1.75;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.p-case-study__header .p-cs-hero__scope {
  margin: 6px 0 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* Blocks */
.p-case-study__block {
  margin-top: var(--space-md);
}
.p-case-study__block:first-child {
  margin-top: 0;
}

/* SP: detail アコーディオン（トグルはプレビューパネルの下） */
.p-case-study__more-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  margin: var(--space-sm) 0 0;
  padding: 0;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  color: var(--color-primary-dark);
  cursor: pointer;
  transition: opacity var(--transition-base);
}

.p-case-study__more-toggle::after {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  margin-top: 2px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-base);
}

.p-case-study__card.is-more-open .p-case-study__more-toggle::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

@media (hover: hover) {
  .p-case-study__more-toggle:hover {
    opacity: 0.7;
  }
}

.p-case-study__more-panel {
  margin: 0;
}

.p-case-study__more-panel .p-case-study__block:first-child {
  margin-top: 0;
}

@media (max-width: 767px) {
  .p-case-study__more-toggle {
    display: inline-flex;
  }

  /* 閉じたとき：ご依頼前の状態が少し見える＋下端グラデーション */
  .p-case-study__more-panel {
    position: relative;
    display: block;
    max-height: 5.5rem;
    overflow: hidden;
    transition: max-height 0.45s ease;
  }

  .p-case-study__more-panel::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    height: 3rem;
    background: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0.85) 45%,
      var(--color-white) 100%
    );
    pointer-events: none;
    transition: opacity 0.35s ease;
  }

  .p-case-study__card.is-more-open .p-case-study__more-panel {
    max-height: 3000px;
    overflow: visible;
  }

  .p-case-study__card.is-more-open .p-case-study__more-panel::after {
    opacity: 0;
  }
}

@media (min-width: 768px) {
  .p-case-study__more-toggle {
    display: none;
  }

  .p-case-study__more-panel {
    display: block;
    max-height: none;
    overflow: visible;
  }

  .p-case-study__more-panel::after {
    content: none;
  }
}

.p-case-study__block-label {
  display: inline-block;
  margin: 0 0 var(--space-sm);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.p-case-study__block--before .p-case-study__block-label {
  background-color: #efefef;
  color: var(--color-text);
}

.p-case-study__block--approach .p-case-study__block-label {
  background-color: rgba(118, 199, 192, 0.14);
  color: var(--color-primary-dark);
}

.p-case-study__block--after .p-case-study__block-label {
  background-color: rgba(226, 190, 51, 0.22);
  color: #8a7340;
}

/* Lists */
.p-case-study__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.p-case-study__list-item {
  position: relative;
  padding-left: calc(18px + 0.55em);
  font-size: 14px;
  line-height: 1.85;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .p-case-study__list-item {
    font-size: 15px;
  }
}

.p-case-study__list-item + .p-case-study__list-item {
  margin-top: 8px;
}

.p-case-study__list--teal .p-case-study__list-item::before {
  content: '';
  position: absolute;
  top: 0.45em;
  left: 0;
  width: 16px;
  height: 15px;
  background: url('../image/check2-circle.svg') no-repeat center / contain;
}

.p-case-study__list--gold .p-case-study__list-item::before {
  content: '';
  position: absolute;
  top: 0.45em;
  left: 0;
  width: 16px;
  height: 15px;
  background-color: #e2be33;
  mask: url('../image/check2-circle.svg') no-repeat center / contain;
  -webkit-mask: url('../image/check2-circle.svg') no-repeat center / contain;
}

/* Approach */
.p-case-study__approach {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.p-case-study__approach-item {
  text-align: center;
}

.p-case-study__approach-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  border: 1px solid rgba(118, 199, 192);
  border-radius: var(--radius-circle);
}

.p-case-study__approach-icon .p-cs-approach__icon-img {
  width: 90px;
}

.p-case-study__approach-title {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-primary-dark);
}

/* Visual column */
.p-case-study__visual-link {
  display: block;
}

.p-case-study__visual {
  margin: 0;
  aspect-ratio: 16 / 10;
  border-radius: 2px;
  overflow: hidden;
}

.p-case-study__visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
}

.p-case-study__visual-placeholder {
  width: 100%;
  height: 100%;
  min-height: 200px;
  background: linear-gradient(160deg, #eef6f4 0%, #dceeea 100%);
}

.p-case-study__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
}

.p-case-study__tag span {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(68, 68, 68, 0.35);
  border-radius: 2px;
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.p-case-study__intro {
  margin-top: var(--space-sm);
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .p-case-study__intro {
    font-size: 15px;
  }
}

/* Navigation */
.p-case-study__nav {
  position: relative;
  z-index: 2;
  grid-row: 1;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  transition: opacity var(--transition-base);
}

.p-case-study__nav--prev {
  grid-column: 1;
}

.p-case-study__nav--next {
  grid-column: 3;
}

@media (hover: hover) {
  .p-case-study__nav:hover {
    opacity: 0.65;
  }
}

.p-case-study__nav::after {
  content: '';
  display: block;
  width: 11px;
  height: 11px;
  margin: auto;
  border-top: 2px solid var(--color-accent);
  border-right: 2px solid var(--color-accent);
}

.p-case-study__nav--prev::after {
  transform: rotate(-135deg) translate(1px, -1px);
}

.p-case-study__nav--next::after {
  transform: rotate(45deg) translate(-1px, 1px);
}

/* Pagination */
.p-case-study__pagination {
  position: static !important;
  grid-column: 2;
  grid-row: 2;
  justify-self: end;
  width: auto !important;
  text-align: right;
}

.p-case-study__pagination .swiper-pagination-bullet {
  position: relative;
  width: 6px;
  height: 6px;
  margin: 0 10px !important;
  border-radius: var(--radius-circle);
  background: #d4d4d4;
  opacity: 1;
  transition:
    width var(--transition-base),
    height var(--transition-base),
    background-color var(--transition-base);
}

.p-case-study__pagination .swiper-pagination-bullet::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
}

.p-case-study__pagination .swiper-pagination-bullet-active {
  width: 10px;
  height: 10px;
  background: var(--color-primary);
}

.p-case-study__more {
  margin-top: var(--space-md);
  text-align: center;
}

.p-case-study__more .c-btn--fv-outline {
  border-color: var(--color-border);
  background-color: var(--color-white);
}

@media (hover: hover) {
  .p-case-study__more .c-btn--fv-outline:hover {
    border-color: var(--color-primary);
    background-color: rgba(118, 199, 192, 0.06);
  }
}