/* ============================================================
   スマート電卓 ～Math Solver～ — 詳細ページスタイル
   ============================================================ */

/* ── ヒーロー ── */
.hero {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}

.hero-inner {
  max-width: 1060px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 4rem;
  align-items: center;
}

/* アプリアイコン */
.app-icon-area {
  margin-bottom: 1.4rem;
}

.app-icon-img {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  display: block;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.app-icon-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  background: var(--bg);
  border: 2px dashed var(--border2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.app-icon-placeholder span {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--muted2);
  letter-spacing: 0.06em;
}

/* メタ（バッジ） */
.app-meta {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.platform-badge {
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid #c8efd8;
  border-radius: 3px;
  padding: 0.2rem 0.55rem;
}

.app-status-badge {
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #d97706;
  background: #fef3c7;
  border: 1px solid #fde68a;
  border-radius: 3px;
  padding: 0.2rem 0.55rem;
}

/* タイトル */
.app-title {
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 0.2rem;
}

.app-subtitle {
  font-size: 1rem;
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 1.1rem;
}

.app-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1.8rem;
}

/* Google Play ボタン */
.play-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--text);
  border-radius: 10px;
  padding: 0.8rem 1.4rem;
  cursor: default;
  user-select: none;
}

.play-icon {
  width: 22px;
  height: 22px;
  color: var(--green-l);
  flex-shrink: 0;
}

.play-label {
  display: block;
  font-size: 0.65rem;
  color: #aaa;
  letter-spacing: 0.05em;
  line-height: 1;
  margin-bottom: 0.2rem;
}

.play-store {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

/* ── スクリーンショット（ヒーロー右側） ── */
.hero-screenshots {
  overflow: hidden;
}

.screenshot-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}

.screenshot-scroll::-webkit-scrollbar { display: none; }

.ss-img {
  height: 480px;
  width: auto;
  border-radius: 18px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  flex-shrink: 0;
  border: 1px solid var(--border);
}

.ss-placeholder {
  height: 480px;
  width: 220px;
  border-radius: 18px;
  background: var(--bg);
  border: 2px dashed var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ss-placeholder span {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted2);
  letter-spacing: 0.06em;
}

/* ── 機能グリッド ── */
.features-section {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.feature-item {
  padding: 2rem;
  border-right: 1px solid var(--border);
}

.feature-item:last-child { border-right: none; }

.feature-num {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--muted2);
  letter-spacing: 0.1em;
  margin-bottom: 0.8rem;
}

.feature-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.feature-item p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.feature-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.feature-tags li {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.15rem 0.45rem;
}

/* ── 機能詳細（画像 + テキスト） ── */
.detail-section {
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

.detail-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.detail-item.reverse {
  direction: rtl;
}

.detail-item.reverse > * {
  direction: ltr;
}

.detail-text h3 {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.8rem;
}

.detail-text p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.85;
}

.detail-img-area img {
  width: 100%;
  max-width: 320px;
  border-radius: 18px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}

.detail-img-placeholder {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 9/16;
  background: var(--bg);
  border: 2px dashed var(--border2);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.detail-img-placeholder span {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted2);
  letter-spacing: 0.06em;
}

/* ── ツール一覧 ── */
.toollist-section {
  background: var(--bg);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.tool-cell {
  padding: 0.85rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tool-cell.more {
  color: var(--muted2);
  font-weight: 400;
  font-style: italic;
}

/* ── レスポンシブ ── */
@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero { padding: 3rem 1.5rem; }

  .ss-placeholder, .ss-img { height: 360px; width: 165px; }

  .feature-grid { grid-template-columns: 1fr; }

  .feature-item {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .feature-item:last-child { border-bottom: none; }

  .detail-item,
  .detail-item.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .app-title { font-size: 1.9rem; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .ss-placeholder, .ss-img { height: 300px; width: 138px; }
}