@charset "UTF-8";

/* ==========================================================================
   基本設定・リセット
   ========================================================================== */
:root {
  --primary-color: #1e56a0;
  --primary-dark: #163e75;
  --primary-light: #eef4fc;
  --accent-color: #e65c00;
  --accent-hover: #c44d00;
  --accent-light: #fff4ec;
  --success-color: #2e7d32;
  --success-light: #eef7ee;
  --text-main: #222222;
  --text-sub: #555555;
  --border-color: #cccccc;
  --bg-page: #f5f7fa;
  --bg-card: #ffffff;
  --link-color: #0055cc;
  --link-hover: #003380;
  --max-width: 1000px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, "Yu Gothic", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

/* リンクはリンクとはっきりわかるデザイン（下線＋青色） */
a {
  color: var(--link-color);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
  transition: color 0.15s ease, background-color 0.15s ease;
}

a:hover, a:focus {
  color: var(--link-hover);
  background-color: rgba(0, 85, 204, 0.06);
}

/* ==========================================================================
   レイアウト容器（最大幅1000px）
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

/* ==========================================================================
   ヘッダー（全ページ共通）
   ========================================================================== */
.site-header {
  background-color: var(--bg-card);
  border-bottom: 4px solid var(--primary-color);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.header-top {
  padding: 16px 0 12px;
}

.site-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-subtitle {
  font-size: 0.85rem;
  color: var(--primary-color);
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.03em;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.35;
}

.site-title a {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 800;
}

.site-title a:hover {
  color: var(--primary-color);
  background-color: transparent;
}

/* グローバルナビゲーション（順序がひと目でわかるステップ型ボタンナビ） */
.global-nav {
  background-color: var(--primary-light);
  border-top: 1px solid #d6e4f5;
  padding: 10px 0;
}

.nav-guide-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 6px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.nav-item {
  display: flex;
}

.nav-link {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  padding: 8px 10px;
  background-color: #ffffff;
  border: 2px solid var(--primary-color);
  border-radius: 6px;
  color: var(--primary-dark);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.35;
  box-shadow: 0 2px 0 rgba(30, 86, 160, 0.2);
  transition: transform 0.1s ease, background-color 0.15s ease;
}

.nav-link .step-badge {
  display: inline-block;
  font-size: 0.72rem;
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 1px 6px;
  border-radius: 3px;
  margin-bottom: 3px;
  width: fit-content;
}

.nav-link:hover, .nav-link:focus {
  background-color: #dceaff;
  color: var(--primary-dark);
  transform: translateY(-1px);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-dark);
}

.nav-link.active .step-badge {
  background-color: #ffffff;
  color: var(--primary-dark);
}

/* ==========================================================================
   パンくずリスト＆現在のステップインジケーター
   ========================================================================== */
.breadcrumb-bar {
  background-color: #eaeff5;
  padding: 8px 0;
  font-size: 0.85rem;
  border-bottom: 1px solid #d5dde6;
}

.breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb-list li + li::before {
  content: "＞";
  margin-right: 6px;
  color: #777777;
}

/* ==========================================================================
   メインコンテンツ領域
   ========================================================================== */
.main-content {
  padding: 28px 0 48px;
}

.content-card {
  background-color: var(--bg-card);
  border: 1px solid #dce2ea;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* ページ見出し（H1） */
.page-header {
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.page-step-label {
  display: inline-block;
  background-color: var(--accent-color);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.page-title {
  margin: 0;
  font-size: 1.75rem;
  line-height: 1.4;
  color: var(--text-main);
}

.lead-box {
  background-color: var(--primary-light);
  border: 2px solid #b8d0f0;
  border-radius: 8px;
  padding: 18px 22px;
  margin-bottom: 28px;
}

.lead-box p {
  margin: 0 0 10px 0;
}

.lead-box p:last-child {
  margin-bottom: 0;
}

/* セクション見出し（H2, H3） */
h2 {
  font-size: 1.4rem;
  color: var(--primary-dark);
  background-color: #f0f5fc;
  border-left: 7px solid var(--primary-color);
  border-bottom: 2px solid #d0dff2;
  padding: 12px 16px;
  margin: 40px 0 20px;
  line-height: 1.4;
}

h3 {
  font-size: 1.18rem;
  color: var(--text-main);
  border-bottom: 2px dashed var(--primary-color);
  padding-bottom: 6px;
  margin: 28px 0 14px;
  line-height: 1.45;
}

p {
  margin: 0 0 16px 0;
}

/* ==========================================================================
   目次ボックス（「このページで学ぶこと」）
   ========================================================================== */
.toc-box {
  background-color: #fafafa;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 18px 24px;
  margin: 24px 0 32px;
}

.toc-title {
  font-weight: 800;
  font-size: 1.05rem;
  margin: 0 0 10px 0;
  color: var(--primary-dark);
}

.toc-list {
  margin: 0;
  padding-left: 22px;
}

.toc-list li {
  margin-bottom: 6px;
}

/* ==========================================================================
   図解・イラスト表示枠
   ========================================================================== */
.figure-box {
  margin: 26px 0;
  padding: 16px;
  background-color: #fcfcfc;
  border: 2px solid #dfe5ec;
  border-radius: 8px;
  text-align: center;
}

.figure-box img {
  border-radius: 4px;
  border: 1px solid #e0e0e0;
  max-height: 520px;
  width: auto;
}

.figure-caption {
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--text-sub);
  font-weight: 700;
  text-align: left;
  background-color: #f2f5f8;
  padding: 8px 12px;
  border-radius: 4px;
}

/* ==========================================================================
   順序ステップカード（「あっこんな順序で見ていったらいいのね」がわかるUI）
   ========================================================================== */
.roadmap-section {
  background-color: #fffdf9;
  border: 2px solid #f0c38e;
  border-radius: 8px;
  padding: 24px;
  margin: 28px 0;
}

.roadmap-heading {
  margin-top: 0;
  background-color: transparent;
  border: none;
  border-bottom: 2px solid var(--accent-color);
  padding: 0 0 10px 0;
  color: #b34700;
}

.step-card-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.step-card {
  position: relative;
  background-color: #ffffff;
  border: 2px solid var(--primary-color);
  border-radius: 8px;
  padding: 20px 22px;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.05);
}

.step-card-arrow {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-color);
  line-height: 1;
  margin: -6px 0;
}

.step-card-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.step-number {
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 4px 12px;
  border-radius: 4px;
}

.step-card-title {
  margin: 0;
  font-size: 1.25rem;
  color: var(--primary-dark);
  border: none;
  padding: 0;
}

.step-card p {
  margin-bottom: 14px;
}

/* ==========================================================================
   ボタンデザイン（ボタンはボタンとはっきりわかる立体ボタン）
   ========================================================================== */
.btn {
  display: inline-block;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.1s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
  border-color: #103566;
  box-shadow: 0 4px 0 #103566;
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--primary-dark);
  color: #ffffff;
  transform: translateY(1px);
  box-shadow: 0 3px 0 #103566;
}

.btn-accent {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: #9e3f00;
  box-shadow: 0 4px 0 #9e3f00;
}

.btn-accent:hover, .btn-accent:focus {
  background-color: var(--accent-hover);
  color: #ffffff;
  transform: translateY(1px);
  box-shadow: 0 3px 0 #9e3f00;
}

.btn-outline {
  background-color: #ffffff;
  color: var(--primary-dark);
  border-color: var(--primary-color);
  box-shadow: 0 3px 0 #b3c7e6;
}

.btn-outline:hover, .btn-outline:focus {
  background-color: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(1px);
}

/* ページ下部の「前の工程／次の工程へ進む」ナビゲーション */
.step-pager {
  margin-top: 44px;
  padding: 24px;
  background-color: var(--accent-light);
  border: 2px solid #f2b785;
  border-radius: 8px;
}

.step-pager-title {
  margin: 0 0 14px 0;
  font-size: 1.1rem;
  font-weight: 800;
  color: #9e3f00;
  text-align: center;
}

.step-pager-buttons {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 16px;
  flex-wrap: wrap;
}

.step-pager-buttons .btn {
  flex: 1 1 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 14px 18px;
}

.btn-subtext {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.92;
}

/* ==========================================================================
   表（テーブル）・ポイント解説ボックス・Q&A
   ========================================================================== */
.table-wrap {
  overflow-x: auto;
  margin: 20px 0 28px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid #c5d0de;
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 700;
  white-space: nowrap;
}

tr:nth-child(even) td {
  background-color: #f8fafd;
}

.point-box {
  background-color: var(--success-light);
  border: 2px solid #81c784;
  border-radius: 8px;
  padding: 18px 20px;
  margin: 24px 0;
}

.point-box-title {
  font-weight: 800;
  color: var(--success-color);
  margin: 0 0 8px 0;
  font-size: 1.05rem;
}

.qa-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 20px 0;
}

.qa-item {
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  overflow: hidden;
}

.qa-q {
  background-color: #eef4fc;
  padding: 12px 16px;
  font-weight: 700;
  color: var(--primary-dark);
  border-bottom: 1px solid #cbd5e1;
}

.qa-a {
  padding: 14px 16px;
  background-color: #ffffff;
}

/* ==========================================================================
   フッター（全ページ共通＋AI活用免責事項）
   ========================================================================== */
.site-footer {
  background-color: #1f2937;
  color: #f3f4f6;
  padding: 36px 0 28px;
  border-top: 4px solid var(--primary-color);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  margin-bottom: 24px;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px 0;
  border-bottom: 1px solid #4b5563;
  padding-bottom: 6px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #93c5fd;
  text-decoration: underline;
}

.footer-links a:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.footer-disclaimer {
  background-color: #111827;
  border: 1px solid #374151;
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: #d1d5db;
  line-height: 1.6;
}

.footer-copy {
  text-align: center;
  font-size: 0.82rem;
  color: #9ca3af;
  margin: 0;
}

/* ==========================================================================
   レスポンシブ対応（タブレット・スマートフォン）
   ========================================================================== */
@media (max-width: 820px) {
  .nav-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-item:first-child {
    grid-column: span 2;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .content-card {
    padding: 20px 16px;
  }
  .page-title {
    font-size: 1.4rem;
  }
  h2 {
    font-size: 1.22rem;
  }
}

@media (max-width: 480px) {
  .nav-list {
    grid-template-columns: 1fr;
  }
  .nav-item:first-child {
    grid-column: span 1;
  }
  .site-title {
    font-size: 1.25rem;
  }
}