/* ===== 説明ハブ 共通スタイル ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
  background: #f8f9fa;
  color: #333;
  line-height: 1.7;
  padding: 20px;
}
.container { max-width: 800px; margin: 0 auto; }
h1 {
  text-align: center;
  font-size: 1.6em;
  margin: 20px 0 10px;
  color: #333;
}
.subtitle {
  text-align: center;
  color: #888;
  font-size: 0.9em;
  margin-bottom: 30px;
}
h2 {
  font-size: 1.3em;
  color: #333;
  margin: 30px 0 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid #7ecbff;
}
h3 { font-size: 1.1em; color: #555; margin: 20px 0 10px; }

/* 戻るリンク */
.back-link {
  display: inline-block;
  margin: 0 0 10px;
  padding: 8px 16px;
  background: #fff;
  border: 2px solid #7ecbff;
  border-radius: 20px;
  color: #4a9bd9;
  text-decoration: none;
  font-size: 0.9em;
  font-weight: bold;
}
.back-link:hover { background: #e8f4fd; }

/* 図解カード */
.diagram-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  margin: 20px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.diagram-title { font-weight: bold; font-size: 1.1em; margin-bottom: 15px; color: #4a9bd9; }

/* フロー図 */
.flow { display: flex; flex-direction: column; align-items: center; gap: 0; }
.flow-step {
  background: #e8f4fd; border: 2px solid #3498db; border-radius: 10px;
  padding: 12px 24px; text-align: center; font-weight: bold; min-width: 280px; position: relative;
}
.flow-step.green { background: #e8f8e8; border-color: #27ae60; }
.flow-step.orange { background: #fef3e2; border-color: #f39c12; }
.flow-step.red { background: #fde8e8; border-color: #e74c3c; }
.flow-step.purple { background: #f0e6f6; border-color: #8e44ad; }
.flow-step small { font-weight: normal; display: block; color: #666; font-size: 0.85em; }
.flow-arrow { font-size: 1.5em; color: #999; line-height: 1; padding: 4px 0; }

/* 比較テーブル */
.compare-table { width: 100%; border-collapse: collapse; margin: 15px 0; }
.compare-table th { background: #5bb8f5; color: #fff; padding: 10px 12px; text-align: left; font-size: 0.9em; }
.compare-table td { padding: 10px 12px; border-bottom: 1px solid #eee; font-size: 0.9em; vertical-align: top; }
.compare-table tr:nth-child(even) td { background: #f8f9fa; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.8em; font-weight: bold; }
.badge-blue { background: #d4e6f1; color: #3a9fd8; }
.badge-green { background: #d5f5e3; color: #1e8449; }
.badge-orange { background: #fdebd0; color: #ca6f1e; }
.badge-red { background: #fadbd8; color: #c0392b; }

/* 3層図 */
.layer-diagram { display: flex; flex-direction: column; gap: 8px; margin: 15px 0; }
.layer { border-radius: 10px; padding: 16px 20px; position: relative; }
.layer-label { font-weight: bold; font-size: 0.85em; opacity: 0.7; margin-bottom: 4px; }
.layer-content { font-size: 0.95em; }
.layer-1 { background: #fef3e2; border: 2px solid #f39c12; }
.layer-2 { background: #e8f4fd; border: 2px solid #3498db; }
.layer-3 { background: #e8f8e8; border: 2px solid #27ae60; }
.layer-connector { text-align: center; font-size: 1.2em; color: #999; }

/* ポイントボックス */
.point-box { background: #fff; border-left: 4px solid #27ae60; border-radius: 0 8px 8px 0; padding: 16px 20px; margin: 15px 0; }
.point-box.warn { border-left-color: #e74c3c; }
.point-box.info { border-left-color: #5bb8f5; }
.point-box strong { color: #4a9bd9; }

/* ひとこと解説 */
.explain { background: #fffbe6; border: 2px solid #dbc34a; border-radius: 8px; padding: 14px 18px; margin: 12px 0; font-size: 0.9em; color: #665500; }

/* 横並びカード */
.card-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 18px 0; }
.mini-card { background: #fff; border-radius: 10px; padding: 16px; border: 3px solid #3c9a4a; text-align: center; }
.mini-card .icon { font-size: 2em; margin-bottom: 8px; }
.mini-card .label { font-weight: bold; color: #4a9bd9; margin-bottom: 4px; }
.mini-card .desc { font-size: 0.85em; color: #777; }

/* ツール比較を一目で分ける図解 */
.tool-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 18px 0;
}
.tool-card {
  background: #fff;
  border: 3px solid #3c9a4a;
  border-radius: 12px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  align-items: center;
}
.tool-card .tool-icon { font-size: 2em; text-align: center; }
.tool-card .tool-name { font-weight: bold; font-size: 1.08em; color: #333; }
.tool-card .tool-role { color: #666; font-size: 0.9em; }
.tool-card .tool-cost { color: #c0392b; font-size: 0.85em; margin-top: 4px; }
.tool-card.base { border-color: #27ae60; background: #f4fbf5; }
.tool-card.pro { border-color: #8e44ad; background: #faf5ff; }
.tool-card.easy { border-color: #f39c12; background: #fff8ec; }
.vs-strip {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 8px;
  align-items: center;
  margin: 18px 0;
}
.vs-pill {
  background: #fff;
  border: 3px solid #3c9a4a;
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  font-weight: bold;
}
.vs-pill.base { border-color: #27ae60; background: #f4fbf5; }
.vs-pill.pro { border-color: #8e44ad; background: #faf5ff; }
.vs-pill.easy { border-color: #f39c12; background: #fff8ec; }
.vs-pill small {
  display: block;
  color: #777;
  font-weight: normal;
  font-size: 0.8em;
}
.vs-arrow { color: #999; font-weight: bold; }

/* Q&A */
.qa { background: #fff; border-radius: 10px; padding: 18px 20px; margin: 12px 0; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.qa .q { font-weight: bold; color: #c2185b; margin-bottom: 6px; }
.qa .a { font-size: 0.92em; color: #444; }

@media (max-width: 600px) {
  .card-row { grid-template-columns: 1fr; }
  .flow-step { min-width: auto; }
  .vs-strip { grid-template-columns: 1fr; }
  .vs-arrow { text-align: center; transform: rotate(90deg); }
}

/* ===== トップ画面（ハブ）専用 ===== */
.hub-intro { text-align: center; color: #666; font-size: 0.95em; margin-bottom: 24px; }
.genre { margin: 28px 0; }
.genre-head { display: flex; align-items: center; gap: 8px; font-size: 1.15em; font-weight: bold; color: #333; padding: 8px 0; border-bottom: 2px solid #7ecbff; margin-bottom: 14px; }
.genre-head .gicon { font-size: 1.3em; }
.title-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.title-card {
  display: block; background: #fff; border-radius: 12px; padding: 18px 20px;
  border: 2px solid #3c9a4a; text-decoration: none; color: #333;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05); transition: all .15s;
}
.title-card:hover { border-color: #5bb8f5; box-shadow: 0 4px 14px rgba(91,184,245,0.25); transform: translateY(-2px); }
.title-card .tc-icon { font-size: 1.6em; }
.title-card .tc-title { font-weight: bold; font-size: 1.02em; margin: 6px 0 4px; }
.title-card .tc-desc { font-size: 0.82em; color: #888; line-height: 1.5; }
.title-card .tc-new { display: inline-block; background: #ff6b6b; color: #fff; font-size: 0.68em; font-weight: bold; padding: 1px 7px; border-radius: 10px; margin-left: 6px; vertical-align: middle; }
@media (max-width: 600px) { .title-grid { grid-template-columns: 1fr; } }