/* ========================================
   Solutions Page Styles
   ======================================== */

/* Tabs Container */
.solutions-page .page-header {
  background-image: url('../images/solutions/solutions-header-self_kv.webp');
  background-size: cover;
  background-position: center 60%;
  background-repeat: no-repeat;
  color: var(--color-black);
}

.solutions-page .page-header .page-title,
.solutions-page .page-header .page-subtitle {
  color: var(--color-black);
  text-shadow: none;
}

.solutions-page .tabs-container {
  margin-bottom: var(--spacing-2xl);
  margin-top: var(--spacing-lg);
}

.solutions-page .tabs-nav {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
  border-bottom: none;
  gap: var(--spacing-md);
}

/* タブが <button> と <a> 混在しても同色（a は UA の :visited 青を防ぐため明示） */
.solutions-page .tabs-nav a.tab-btn {
  text-decoration: none;
  display: inline-flex;
  box-sizing: border-box;
}

.solutions-page .tabs-nav a.tab-btn:link,
.solutions-page .tabs-nav a.tab-btn:visited {
  color: var(--color-white);
}

.solutions-page .tabs-nav a.tab-btn:hover {
  color: var(--color-black);
}

.solutions-page .tab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-100);
  color: var(--color-white);
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
  line-height: 1.35;
  border-radius: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  min-height: 3.2em;
  text-align: center;
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.solutions-page .tab-btn:hover {
  background-color: var(--color-gray-800);
  color: var(--color-black);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.solutions-page .tab-btn.active {
  background-color: var(--color-white);
  color: var(--color-black);
  border: none;
}

/* タブコンテンツの表示制御 */
.solutions-page .tab-content {
  display: none;
}

.solutions-page .tab-content.active {
  display: block;
}

.solutions-page .main-content {
  margin-bottom: 60px;
}

@media (min-width: 769px) {
  .solutions-page .section > .container {
    margin-bottom: 60px;
  }
}

@media (max-width: 768px) {
  .solutions-page .page-header .page-title,
  .solutions-page .page-header .page-subtitle {
    text-shadow:
      0 0 12px rgba(255, 255, 255, 0.98),
      0 0 24px rgba(255, 255, 255, 0.88),
      0 1px 3px rgba(255, 255, 255, 1),
      0 2px 8px rgba(255, 255, 255, 0.75);
  }

  .solutions-page .main-content {
    margin-bottom: var(--spacing-xs);
  }

  .solutions-page .section > .container {
    margin-bottom: var(--spacing-lg);
  }
}

/* 白背景時の文字色調整 */
.solutions-page .tab-btn.active {
  color: var(--color-black);
}

.solutions-page .solution-title {
  font-size: var(--font-size-xl);
  color: var(--color-white);
  margin: var(--spacing-lg) var(--spacing-md) var(--spacing-md) var(--spacing-md);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  /* 1行タイトルでも2行分の高さを確保し、下の説明文の開始位置を揃える */
  min-height: 2.8em;
}

.solutions-page .solution-desc {
  font-size: var(--font-size-sm);
  color: var(--color-white);
  line-height: var(--line-height-relaxed);
  padding: 0 var(--spacing-md) var(--spacing-xl) var(--spacing-md);
  margin-bottom: 0;
  text-align: left;
}

/* 重複定義を削除 - solutions-page .tab-content を使用 */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Solution Intro（content-box内は白文字に統一） */
.solution-intro {
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
  text-align: center;
  margin: var(--spacing-lg) 0 var(--spacing-2xl);
  max-width: 100%;
}

.solutions-page .content-box .solution-intro {
  color: var(--color-white);
}

/* タブ共通：見出しと導入文の余白・配色 */
.solutions-page .content-box .section-title {
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
}

.solutions-page .content-box .section-subtitle {
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
}

.solutions-page .content-box .solution-intro {
  margin-top: 0;
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-base);
}

/* Solutions Grid */
.solutions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: var(--spacing-2xl);
  justify-items: stretch;
}

@media (min-width: 992px) {
  .solutions-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    gap: 0;
  }

  .solutions-grid .solution-card {
    width: 100%;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .solutions-grid .solution-card:only-child {
    grid-column: 2;
  }

  .solutions-grid:has(.solution-card:nth-child(2):last-child) {
    grid-template-columns: minmax(48px, 0.5fr) repeat(2, minmax(0, 1fr)) minmax(48px, 0.5fr);
  }

  .solutions-grid:has(.solution-card:nth-child(2):last-child) .solution-card:nth-child(1) {
    grid-column: 2;
  }

  .solutions-grid:has(.solution-card:nth-child(2):last-child) .solution-card:nth-child(2) {
    grid-column: 3;
  }

  .solutions-grid .solution-card:last-child:nth-child(3n + 1) {
    grid-column: 2;
  }
}

/* 高圧ソリューション：下段（4〜6枚目）を非表示。ラッパー無し・子の並びはそのまま。
   display:none の要素はグリッドに参画しないため、見えるのは上段3枚だけの1行。 */
#high-voltage .solutions-grid > .solution-card:nth-child(n + 4) {
  display: none;
}

.solutions-performance-link {
  margin-top: var(--spacing-2xl);
  text-align: center;
  background-color: var(--color-gray-300);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-none);
  color: var(--color-white);
}

.solutions-performance-link .btn,
.solutions-performance-link .btn-primary {
  min-width: 220px;
  color: var(--color-white);
  background-color: transparent;
  border-color: var(--color-white);
}

.solutions-performance-link .btn:hover,
.solutions-performance-link .btn-primary:hover {
  color: var(--color-gray-300);
  background-color: var(--color-white);
  border-color: var(--color-white);
}

/* 主要取引先セクション（変圧器タブのみ） */
.solutions-partners-section {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--color-white);
}

.solutions-partners-section .section-title {
  margin-top: 0;
  margin-bottom: var(--spacing-xl);
}

.solutions-partners-section .company-partners-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12rem;
  align-items: start;
  justify-items: start;
  max-width: 800px;
  margin: 0 auto;
}

.solutions-partners-section .company-partners-column {
  margin-top: 0;
}

.solutions-partners-section .company-partners-column:nth-child(2) {
  margin-left: var(--spacing-xl);
}

.solutions-partners-section .company-partners-list {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left !important;
}

.solutions-partners-section .company-partners-list li {
  padding: 0.5rem 0;
  border-bottom: none;
  font-size: 0.95rem;
  text-align: left !important;
}

/* Solution Card */
.solution-card {
  display: block;
  background-color: var(--color-gray-300);
  border: none;
  border-radius: var(--radius-none);
  overflow: hidden;
  transition: all 1s ease;
  text-decoration: none;
  color: inherit;
  min-height: 500px;
  height: 100%;
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: inherit;
  background-color: var(--color-gray-400);
}

.solution-card:hover .solution-image {
  background-color: var(--color-gray-400);
  transition: background-color 1s ease;
}

.solution-card:hover .solution-title,
.solution-card:hover .solution-desc {
  color: var(--color-white);
  transition: color 1s ease;
}

a.solution-card {
  cursor: pointer;
}

a.solution-card:visited {
  color: inherit;
}

a.solution-card:active {
  color: inherit;
}

.solution-image {
  width: 100%;
  aspect-ratio: 6 / 4;
  overflow: hidden;
  background-color: var(--color-gray-300);
  transition: background-color 1s ease;
}

.solution-card .solution-title,
.solution-card .solution-desc {
  color: var(--color-white);
}

.solution-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-sm);
  padding-top: calc(var(--spacing-sm) + 20px);
  background-color: transparent;
  transition: transform var(--transition-slow);
}


.solution-card.topmold-card .solution-image img {
  object-fit: contain;
  padding: var(--spacing-sm);
  padding-top: calc(var(--spacing-sm) + 20px);
}


.solution-card.toprunner-card .solution-image img {
  object-fit: contain;
  padding: var(--spacing-sm);
  padding-top: calc(var(--spacing-sm) + 20px);
}


.solution-card.solution-tx5000-card .solution-image img,
.solution-card.solution-tx50000-card .solution-image img,
.solution-card.storage-stand-card .solution-image img,
.solution-card.cubicle-card .solution-image img,
.solution-card.container-card .solution-image img {
  object-fit: contain;
  padding: var(--spacing-sm);
  padding-top: calc(var(--spacing-sm) + 20px);
}


.solution-card.solution-ehps-card .solution-image img {
  object-fit: contain;
  object-position: center;
  padding: var(--spacing-sm);
  padding-top: calc(var(--spacing-sm) + 20px);
}

.solution-card:hover .solution-image img {
  transform: scale(1.05);
}

/* 重複定義を削除 - solutions-page .solution-title と .solution-desc を使用 */

/* Responsive */
@media (max-width: 991px) {
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (max-width: 768px) {
  .solutions-page .tabs-container {
    margin-top: var(--spacing-md);
  }
  
  .solutions-page .tabs-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    justify-content: center;
  }
  
  .solutions-page .tab-btn {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 2.8em;
    width: 100%;
    text-align: center;
  }
  
  .solution-intro {
    font-size: var(--font-size-base);
  }
  
  .solutions-page .content-box .section-title {
    margin-bottom: var(--spacing-md);
  }

  .solutions-page .content-box .section-subtitle {
    margin-bottom: var(--spacing-sm);
  }

  .solutions-page .content-box .solution-intro {
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-snug);
  }

  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: var(--spacing-lg);
  }
  
  .solutions-page .solution-title {
    font-size: var(--font-size-lg);
    margin: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
  }
  
  .solutions-page .solution-desc {
    font-size: var(--font-size-sm);
    padding: 0 var(--spacing-lg) var(--spacing-lg);
  }

  /* 各項目の下の間延びを防止 */
  .solutions-page .solution-card {
    min-height: 0;
    height: auto;
  }

  /* コンテンツ横幅を広げる（白背景との余白縮小） */
  .section .container {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }
  .content-box {
    padding: var(--spacing-md);
  }
  .solutions-grid {
    gap: 0;
  }
  
  .solutions-partners-section .company-partners-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 100%;
    margin-left: -96px;
    margin-right: -96px;
    padding-left: 96px;
    padding-right: 96px;
  }
  
  .solutions-partners-section .company-partners-column {
    margin-top: -20px;
    margin-left: 0;
    padding-left: 0;
  }
  
  .solutions-partners-section .company-partners-column:nth-child(2) {
    margin-left: 0 !important;
  }
  
  .solutions-partners-section .company-partners-list {
    padding: 0 !important;
    padding-left: 0 !important;
    margin: 0 !important;
    margin-left: 0 !important;
  }
  
  .solutions-partners-section .company-partners-list li {
    padding: 0.5rem 0 !important;
    padding-left: 0 !important;
    margin: 0 !important;
    margin-left: 0 !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (max-width: 576px) {
  .solutions-page .tabs-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
  }
  
  .solutions-page .tab-btn {
    width: 100%;
    min-width: auto;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm);
  }
  
  .solutions-page .solution-title {
    font-size: var(--font-size-base);
    margin: var(--spacing-sm) var(--spacing-md) var(--spacing-xs);
  }
  
  .solutions-page .solution-desc {
    font-size: var(--font-size-xs);
    padding: 0 var(--spacing-md) var(--spacing-md);
  }
  
  .solutions-grid {
    gap: 0;
  }
}

/* 実績一覧タブ用スタイル */
.performance-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: var(--spacing-2xl);
}

@media (min-width: 992px) {
  .performance-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.performance-card {
  background: #fff;
  border: none;
}

.performance-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-base);
}

.performance-image-wrapper:hover {
  transform: scale(1.02);
}

.performance-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 低圧ブロックの画像は下を基準にレイアウト */
.performance-block:nth-child(2) .performance-image {
  object-position: bottom;
}

.performance-caption {
  font-size: 14px;
  color: var(--color-gray-200);
  padding: 8px 0;
  text-align: center;
}

/* モーダルスタイル */
.performance-modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  animation: fadeIn 0.3s ease;
}

.performance-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.performance-modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  margin: auto;
  animation: zoomIn 0.3s ease;
}

.performance-modal-image {
  width: 100%;
  height: auto;
  max-height: 90vh;
  object-fit: contain;
}

.performance-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
  transition: opacity var(--transition-base);
}

.performance-modal-close:hover {
  opacity: 0.7;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.solutions-page .section-header {
  margin-bottom: 32px;
  text-align: center;
}

.solutions-page .section-kicker {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-black);
  display: block;
  margin-bottom: 8px;
}

.solutions-page .section-header .section-title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-normal);
  color: #6b7a90;
  margin-top: 4px;
  margin-bottom: 0;
}

/* 実績一覧ブロック間の間隔 */
.performance-block {
  margin-bottom: var(--spacing-2xl);
}

.performance-block:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .performance-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}