:root {
  --bg-gradient-start: #f7fbff;
  --bg-gradient-end: #dff1ff;
  --text-color: #0a2540;
  --muted-text: #4f6f8f;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(126, 208, 255, 0.4);
  --accent: #48a9f8;
  --accent-strong: #1f7ae0;
  --accent-green: #20d3b0;
  --shadow-soft: 0 18px 40px rgba(15, 70, 120, 0.12);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --transition-base: 0.3s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  background: linear-gradient(160deg, var(--bg-gradient-start), var(--bg-gradient-end));
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

/* 太字タグの共通スタイル: 太字で濃い水色 (プロジェクトの --accent-strong を使用) */
b,
strong {
  font-weight: 800;
  color: var(--accent-strong);
}

.page {
  padding-top: var(--header-height);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  backdrop-filter: blur(12px);
  background-color: rgba(247, 251, 255, 0.92);
  border-bottom: 1px solid rgba(126, 208, 255, 0.3);
  z-index: 10;
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-color);
}

.logo__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

/* 長いロゴ画像はアスペクト比を維持して表示（高さを揃え、幅は自動） */
.logo__text {
  display: block;
  height: 40px; /* ヘッダー内に収まる適切な高さ。必要なら調整してください */
  width: auto;
  max-width: 240px; /* 横幅が極端に広くならないよう制限 */
  object-fit: contain;
  border-radius: 0; /* テキストロゴに角丸は不要なことが多い */
}

.logo__text {
  font-weight: 700;
  font-size: 1.2rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-nav__link {
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link:focus {
  background-color: rgba(72, 169, 248, 0.15);
  transform: translateY(-2px);
}

.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 28px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 22px 50px rgba(15, 70, 120, 0.18);
}

.section-title {
  font-size: 3.2rem;
  margin: 0 0 16px;
}

/* Summary / KAIZEN / Thanks 見出しを中央寄せにし、上に絵文字を表示してセクション見出し風にする */
.report-summary .section-title,
.report-kaizen .section-title,
.report-thanks .section-title {
  text-align: center;
  margin-left: 0;
  margin-right: 0;
  /* 太字にしてグラデーションテキストを適用 */
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent-green));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: headingGradient 8s ease-in-out infinite;
}

.report-summary .section-title::before,
.report-kaizen .section-title::before,
.report-thanks .section-title::before {
  display: block;
  font-size: 1.8rem;
  margin-bottom: 8px;
  line-height: 1;
}

.report-summary .section-title::before { content: "📊"; }
.report-kaizen .section-title::before { content: "🛠️"; }
.report-thanks .section-title::before { content: "✉"; }

@keyframes headingGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* セクションのフロートインアニメーション */
@keyframes floatIn {
  0% {
    opacity: 0;
    transform: translateY(18px) scale(0.995);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 初期状態: JS が有効な場合のみセクションを一旦隠す（JS 無効時は通常表示） */
.site-main.js-enabled section {
  opacity: 0;
  transform: translateY(18px);
  will-change: transform, opacity;
}

/* 表示時にアニメーション。--delay で遅延を指定可能（ms） */
.site-main.js-enabled section.is-visible {
  animation: floatIn 700ms cubic-bezier(.2,.9,.2,1) both;
  animation-delay: var(--delay, 0ms);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: none;
  cursor: pointer;
}

.button--primary {
  color: #fff;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  box-shadow: 0 10px 24px rgba(33, 126, 224, 0.25);
}

.button--primary:hover,
.button--primary:focus {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px rgba(33, 126, 224, 0.35);
}

.button--ghost {
  background-color: rgba(255, 255, 255, 0.6);
  color: var(--text-color);
  border: 1px solid rgba(72, 169, 248, 0.4);
}

.button--ghost:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.next-test__content {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

/* 次のテストが準備中の時のスタイル */
.next-test.is-coming-soon {
  opacity: 1; /* ensure visible even with section animation */
}
.next-test.is-coming-soon .next-test__content {
  filter: grayscale(10%);
  opacity: 0.95;
}
.next-test.is-coming-soon .next-test__date {
  color: var(--muted-text);
  font-weight: 700;
}
.next-test.is-coming-soon .next-test__summary {
  color: var(--muted-text);
}
.next-test.is-coming-soon .next-test__visual img {
  opacity: 0.6;
  transform: scale(0.98);
}
.next-test.is-coming-soon .button--primary {
  display: none;
}

.next-test__title {
  font-size: 2.1rem;
  margin: 0 0 12px;
}

.next-test__date {
  font-weight: 700;
  color: var(--accent-strong);
  margin: 0 0 12px;
}

.next-test__summary {
  margin: 0 0 24px;
  color: var(--muted-text);
}

.filters__list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-button {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.75);
  color: var(--text-color);
  box-shadow: 0 10px 20px rgba(15, 70, 120, 0.12);
  transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
}

.tag-button:hover,
.tag-button:focus {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(15, 70, 120, 0.18);
}

.tag-button.is-active {
  filter: saturate(1.4);
  box-shadow: 0 18px 36px rgba(33, 126, 224, 0.25);
}

.reports__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.reports__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.report-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 24px;
}

.report-card__title {
  font-size: 1.4rem;
  margin: 0 0 12px;
}

.report-card__product {
  margin: 0;
  font-weight: 700;
  color: var(--accent-strong);
}

.report-card__meta {
  margin: 8px 0 16px;
  color: var(--muted-text);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.report-card__summary {
  margin: 0 0 16px;
  color: var(--muted-text);
}

.report-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.tag-pill {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
}

.report-card__link {
  margin-top: 20px;
  align-self: flex-start;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pagination__status {
  font-weight: 600;
}

.site-footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--muted-text);
}

.page--report .report-hero {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.report-hero__title {
  margin: 0;
  font-size: 2.2rem;
}

.report-hero__meta {
  margin: 0;
  color: var(--muted-text);
  font-weight: 500;
}

.report-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.report-summary .summary__media {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.summary__media img,
.summary__media video {
  width: 100%;
  max-width: 900px; /* 大きすぎる画像の最大幅を制限 */
  margin: 0 auto; /* 中央寄せ */
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 28px rgba(15, 70, 120, 0.12);
}

.report-kaizen {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kaizen-item {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  background-color: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow-soft);
}

.kaizen-item + .kaizen-item {
  margin-top: 16px;
}

.kaizen-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  background: rgba(72, 169, 248, 0.12);
}

.kaizen-item__title {
  margin: 0;
  font-size: 1.2rem;
}

.kaizen-item__toggle {
  font-size: 1.4rem;
  transition: transform var(--transition-base);
}

.kaizen-item.is-open .kaizen-item__toggle {
  transform: rotate(90deg);
}

.kaizen-item__body {
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.4s ease;
  padding: 0 24px;
}

.kaizen-item.is-open .kaizen-item__body {
  max-height: 800px;
  opacity: 1;
  padding-bottom: 24px;
}

.kaizen-item__description {
  color: var(--muted-text);
}

.media-gallery {
  display: grid;
  gap: 12px;
  margin-top: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.media-gallery img,
.media-gallery video {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 20px rgba(15, 70, 120, 0.12);
}

.thanks__content {
  line-height: 1.7;
  color: var(--text-color);
  background-color: rgba(255, 255, 255, 0.92);
}

.thanks__content h3,
.thanks__content h4 {
  margin-top: 1.6em;
}

.thanks__content a {
  color: var(--accent-strong);
}

@media (max-width: 768px) {
  .site-main {
    padding: 24px 16px 64px;
    gap: 40px;
  }

  .site-header__inner {
    padding: 0 16px;
  }

  .site-nav {
    gap: 8px;
  }

  .site-nav__link {
    padding: 8px 12px;
    font-size: 0.9rem;
  }

  .next-test__title {
    font-size: 1.8rem;
  }

  .button {
    width: 100%;
  }

  .reports__grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

@media (max-width: 480px) {
  .site-nav {
    display: none;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .report-hero__title {
    font-size: 1.8rem;
  }
}