/* =========================================================
   FDE Japan - トップページ専用スタイル
   白基調・黒文字・シンプルなデザイン
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f7;
  --color-text: #111111;
  --color-text-sub: #4a4a4a;
  --color-border: #e2e2e2;
  --color-accent: #111111;
  --color-accent-soft: #f0f0f0;
  --max-width: 1080px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

body.fde-front {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* :where() で詳細度を上げずにリセット（後続のコンポーネント定義が勝てるように） */
.fde-front :where(*) {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

.fde-front :where(a) {
  color: inherit;
  text-decoration: none;
}

.fde-front :where(ul, ol) {
  list-style: none;
}

.fde-front :where(img) {
  max-width: 100%;
  display: block;
}

.fde-front :where(button) {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===== ヘッダー ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

/* 管理バー表示時のずれ防止 */
body.admin-bar .site-header {
  top: 32px;
}

.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 {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.logo span {
  font-weight: 400;
  margin-left: 2px;
}

.menu-toggle {
  display: none;
  font-size: 1.4rem;
  color: var(--color-text);
  padding: 8px;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 10px 12px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-sub);
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.nav-link-cta {
  background: var(--color-text);
  color: #fff !important;
  padding: 10px 18px;
}

.nav-link-cta:hover {
  background: #333;
  color: #fff !important;
}

/* ===== ヒーロー ===== */
.hero {
  padding: calc(var(--header-height) + 100px) 24px 100px;
  text-align: center;
  background: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}

.hero-lead {
  font-size: 1rem;
  color: var(--color-text-sub);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== ボタン ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid var(--color-text);
  transition: background var(--transition), color var(--transition), opacity var(--transition);
}

.btn-primary {
  background: var(--color-text);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.82;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
}

.btn-outline:hover {
  background: var(--color-accent-soft);
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
  border: none;
}

/* ===== セクション共通 ===== */
.section {
  padding: 100px 24px;
  scroll-margin-top: var(--header-height);
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text-sub);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-text);
  display: inline-block;
}

.sub-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 40px 0 16px;
}

.lead-text {
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: 28px;
  max-width: 760px;
}

.body-text {
  font-size: 0.98rem;
  color: var(--color-text-sub);
  margin-bottom: 20px;
  max-width: 760px;
}

.body-text.small {
  font-size: 0.9rem;
}

.note-text {
  font-size: 0.85rem;
  color: #888;
  margin-top: 24px;
}

.roles-note {
  margin-top: 24px;
}

.flow-note {
  margin-top: 28px;
}

/* ===== 定義カード（FDEとは） ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.def-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 32px;
}

.def-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-text);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.def-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.def-card p {
  color: var(--color-text-sub);
  font-size: 0.92rem;
}

/* ===== 3カラムグリッド ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

/* ===== 役割リスト（FDE Japanとは） ===== */
.roles-list {
  list-style: none;
  counter-reset: role;
  margin-top: 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.roles-list li {
  counter-increment: role;
  position: relative;
  padding: 18px 24px 18px 64px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-sub);
  font-size: 0.95rem;
}

.roles-list li:last-child {
  border-bottom: none;
}

.roles-list li::before {
  content: counter(role, decimal-leading-zero);
  position: absolute;
  left: 22px;
  top: 18px;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ===== プレーンリスト（運営元など） ===== */
.plain-list {
  list-style: none;
  margin-top: 8px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.plain-list li {
  position: relative;
  padding: 16px 24px 16px 34px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-sub);
  font-size: 0.95rem;
}

.plain-list li:last-child {
  border-bottom: none;
}

.plain-list li::before {
  content: '—';
  position: absolute;
  left: 14px;
  color: var(--color-text-sub);
}

/* ===== ユースケース ===== */
.usecase-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.usecase-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 30px 32px;
}

.uc-who {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid var(--color-text);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.uc-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.usecase-item p {
  color: var(--color-text-sub);
  font-size: 0.95rem;
}

/* ===== Mission / Vision / Value ===== */
.vmv-list {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.vmv-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 32px;
}

.vmv-item p {
  color: var(--color-text-sub);
  font-size: 0.95rem;
}

.vmv-statement {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.6;
  color: var(--color-text) !important;
  margin: 14px 0 14px;
}

.values-list {
  margin-top: 8px;
}

.values-list dt {
  font-weight: 700;
  color: var(--color-text);
  margin-top: 20px;
  font-size: 0.98rem;
}

.values-list dt:first-child {
  margin-top: 0;
}

.values-list dd {
  color: var(--color-text-sub);
  font-size: 0.92rem;
  margin-top: 6px;
}

/* ===== 進め方 ===== */
.process-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-top: 24px;
}

.process-list li {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px 28px;
}

.process-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-text);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.process-list h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.process-list p {
  color: var(--color-text-sub);
  font-size: 0.9rem;
}

/* ===== 業務の置き換え先カード ===== */
.dest-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 26px;
}

.dest-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.dest-card p {
  color: var(--color-text-sub);
  font-size: 0.9rem;
}

/* ===== 料金ヘッダー ===== */
.price-head {
  border: 1px solid var(--color-text);
  border-radius: 8px;
  padding: 24px 28px;
  margin: 24px 0 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
}

.price-big {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.price-sub {
  color: var(--color-text-sub);
  font-size: 0.9rem;
}

/* ===== データテーブル（料金・対象地域） ===== */
.table-scroll {
  overflow-x: auto;
  margin-top: 12px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: #fff;
}

.data-table th,
.data-table td {
  border: 1px solid var(--color-border);
  padding: 14px 18px;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--color-bg-alt);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.data-table td {
  color: var(--color-text-sub);
}

/* ===== フォーム ===== */
.form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 10px;
}

.required {
  color: #c0392b;
  font-weight: 500;
  font-size: 0.75rem;
}

.form input,
.form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition);
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-text);
}

.form textarea {
  resize: vertical;
}

.form .btn {
  margin-top: 20px;
}

.form-message {
  font-size: 0.88rem;
  margin-top: 12px;
  min-height: 1.4em;
}

.form-message.success {
  color: #1e7e34;
}

.form-message.error {
  color: #c0392b;
}

.register-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 32px;
}

.register-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 40px;
  margin-top: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

/* ===== フッター ===== */
.site-footer {
  background: #111111;
  color: #f2f2f2;
  padding: 56px 24px 32px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 24px;
}

.footer-logo span {
  font-weight: 400;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  margin-bottom: 32px;
}

.footer-nav a {
  font-size: 0.85rem;
  color: #cccccc;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-copy {
  font-size: 0.8rem;
  color: #888;
}

/* ===== トップへ戻るボタン ===== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-text);
  color: #fff;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ===== レスポンシブ =====
   ナビ項目が多く約1210px以下でCTAが見切れるため、切替は1250pxに設定 */
@media (max-width: 1250px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .main-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    gap: 2px;
  }

  .nav-link {
    padding: 12px 14px;
    width: 100%;
  }

  .nav-link-cta {
    margin-top: 10px;
    text-align: center;
  }

  .pc-only {
    display: none;
  }
}

@media (max-width: 782px) {
  body.admin-bar .site-header {
    top: 46px;
  }
}

@media (max-width: 760px) {
  .grid-2,
  .grid-3,
  .form-row {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 20px;
  }

  .hero {
    padding: calc(var(--header-height) + 60px) 20px 72px;
  }

  .contact-form {
    padding: 28px;
  }
}