/* =========================================================
   Y3デザイン研究所（Y3 Design Lab）自社HP 共通スタイル
   ---------------------------------------------------------
   構成：
   1. テーマ変数定義（A / B の2パターン）
   2. ベース・タイポ
   3. ヘッダー／フッター／テーマ切替
   4. セクション共通（ヒーロー・カード等）
   5. サービス詳細・料金表
   6. ポートフォリオ（works）
   7. 4種別タブ切替フォーム
   8. ボタン・フォーム
   9. フッター／下部固定CTA
   10. ユーティリティ
   11. レスポンシブ調整

   ▼ 色を変えたい場合は :root[data-theme="A"] の中のHEXを書き換えれば
     全ページに即反映されます。
========================================================= */


/* =========================================================
   1. テーマ変数（A：ネイビー×オフホワイト×マスタード / B：ディープグリーン×ベージュ×ウッドブラウン）
========================================================= */

/* 🅰 テーマA（初期値）：モダン・プロフェッショナル */
:root[data-theme="A"] {
  --color-bg:        #F7F5F0;  /* オフホワイト */
  --color-bg-dark:   #0F1E33;  /* ディープネイビー */
  --color-text:      #0F1E33;  /* 基本テキスト色 */
  --color-text-inv:  #F7F5F0;  /* 濃色背景上の文字 */
  --color-accent:    #D4A017;  /* マスタード */
  --color-sub:       #5E6876;  /* サブテキスト */
  --color-border:    rgba(15,30,51,0.12);
  --color-card:      #FFFFFF;
  --shadow-soft:     0 6px 24px rgba(15,30,51,0.08);
}

/* 🅱 テーマB：地元密着・温かみ（ディープグリーン×ベージュ×ウッドブラウン） */
:root[data-theme="B"] {
  --color-bg:        #F7F5F0;  /* オフホワイト */
  --color-bg-dark:   #2F4F3E;  /* ディープグリーン（唐津の松） */
  --color-text:      #2F4F3E;
  --color-text-inv:  #F7F5F0;
  --color-accent:    #8B5A3C;  /* ウッドブラウン */
  --color-sub:       #6B6B63;
  --color-border:    rgba(47,79,62,0.15);
  --color-card:      #FFFFFF;
  --shadow-soft:     0 6px 24px rgba(47,79,62,0.10);
}


/* =========================================================
   2. ベース・タイポグラフィ
========================================================= */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s ease, color .3s ease;
  padding-bottom: 84px; /* 下部固定CTAと被らないように */
}

h1, h2, h3, h4 {
  font-family: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.en-heading {
  font-family: "Playfair Display", "Noto Serif JP", serif;
  font-style: italic;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.5rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, opacity .2s ease;
}

a:hover {
  opacity: 0.75;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* コンテナ */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 1.8rem;
}


/* =========================================================
   3. ヘッダー（全ページ共通）
========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 12px;
}

.site-logo {
  display: inline-flex;
  flex-direction: column;
  font-family: "Playfair Display", "Noto Serif JP", serif;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
  line-height: 1.1;
}

.site-logo small {
  display: block;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--color-sub);
  margin-top: 3px;
}

/* PC用ナビ */
.nav-desktop {
  display: none;
  gap: 22px;
  align-items: center;
}

.nav-desktop a {
  font-size: 0.88rem;
  color: var(--color-text);
  position: relative;
  padding-bottom: 4px;
}

.nav-desktop a.is-current::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
}

/* 電話番号（ヘッダー右側） */
.header-tel {
  display: none;
  font-family: "Playfair Display", "Noto Serif JP", serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 4px 12px;
  border-left: 1px solid var(--color-border);
  line-height: 1.2;
}

.header-tel small {
  display: block;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 0.68rem;
  color: var(--color-sub);
  font-weight: 400;
  margin-top: 2px;
}

/* ハンバーガー（モバイル） */
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform .25s ease, opacity .25s ease;
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* モバイル・メニュー */
.nav-mobile {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 20px 24px;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow-soft);
  z-index: 49;
}

.nav-mobile.is-open {
  display: flex;
}

.nav-mobile a {
  font-size: 1rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.nav-mobile .mobile-tel {
  margin-top: 4px;
  font-family: "Playfair Display", serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* ===== テーマ切替UI ===== */
.theme-switcher {
  position: relative;
}

.theme-switcher-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  font-family: inherit;
  font-size: 0.8rem;
  color: var(--color-text);
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease;
}

.theme-switcher-btn:hover {
  border-color: var(--color-accent);
}

.theme-switcher-btn .theme-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-bg-dark) 100%);
  border: 1px solid var(--color-border);
}

.theme-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 260px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
  padding: 8px;
  display: none;
  z-index: 60;
}

.theme-menu.is-open {
  display: block;
}

.theme-menu button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  transition: background-color .15s ease;
}

.theme-menu button:hover {
  background-color: var(--color-bg);
}

.theme-menu button.is-active {
  background-color: var(--color-bg);
  font-weight: 600;
}

.theme-menu .swatch {
  display: inline-flex;
  gap: 2px;
  flex-shrink: 0;
}

.theme-menu .swatch span {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

/* 各テーマのスウォッチ色（固定） */
.swatch-A span:nth-child(1) { background: #0F1E33; }
.swatch-A span:nth-child(2) { background: #F7F5F0; }
.swatch-A span:nth-child(3) { background: #D4A017; }

.swatch-B span:nth-child(1) { background: #2F4F3E; }
.swatch-B span:nth-child(2) { background: #F7F5F0; }
.swatch-B span:nth-child(3) { background: #8B5A3C; }

.theme-menu small {
  display: block;
  color: var(--color-sub);
  font-size: 0.7rem;
  line-height: 1.4;
}

.theme-menu strong {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 2px;
}


/* =========================================================
   4. セクション共通
========================================================= */

/* ヒーロー（トップ／サブページ共通） */
.hero {
  position: relative;
  min-height: 72vh;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  color: var(--color-text-inv);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(15,30,51,0.70) 0%,
    rgba(15,30,51,0.45) 60%,
    rgba(15,30,51,0.25) 100%
  );
  z-index: 1;
}

.hero-img {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 40px 24px;
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}

.hero-inner h1 {
  font-size: 2rem;
  line-height: 1.4;
  margin-bottom: 1rem;
  color: var(--color-text-inv);
}

.hero-inner p {
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: 28px;
  color: var(--color-text-inv);
}

.hero-inner .hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* サブページ用の薄めヒーロー */
.hero--sub {
  min-height: 38vh;
}
.hero--sub h1 {
  font-size: 1.7rem;
}

/* カードグリッド */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform .25s ease, box-shadow .25s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.10);
}

.card-body {
  padding: 22px;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

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

/* ダーク・アクセントセクション */
.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
}

.section--dark h2,
.section--dark h3 {
  color: var(--color-text-inv);
}

.section--dark p {
  color: var(--color-text-inv);
  opacity: 0.92;
}

.section--dark .en-heading {
  color: var(--color-accent);
}

.section--muted {
  background-color: var(--color-card);
}


/* ===== 3つの約束（index） ===== */
.promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.promise-item {
  text-align: center;
  padding: 28px 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}

.promise-item .promise-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
  color: var(--color-accent);
  display: block;
  line-height: 1;
}

.promise-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.promise-item p {
  font-size: 0.9rem;
  color: var(--color-sub);
  line-height: 1.8;
}


/* ===== 価格帯のアピール（トップ用） ===== */
.price-hero {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-accent) 300%);
  color: var(--color-text-inv);
  padding: 48px 24px;
  border-radius: 12px;
  text-align: center;
}

.price-hero .price-main {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  margin: 12px 0;
  line-height: 1;
}

.price-hero .price-num {
  font-family: "Playfair Display", serif;
  font-size: 3.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.price-hero .price-unit {
  font-size: 1.4rem;
  color: var(--color-text-inv);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.price-hero .price-caption {
  font-size: 0.95rem;
  opacity: 0.9;
}


/* =========================================================
   5. サービス詳細・料金表
========================================================= */

.service-block {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow-soft);
}

.service-block__img img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.service-block__body {
  padding: 28px 24px;
}

.service-block__body h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--color-text);
}

.service-block__body .price {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 12px;
  display: block;
}

.service-block__body ul {
  list-style: none;
  padding-left: 0;
  margin-top: 14px;
}

.service-block__body ul li {
  font-size: 0.9rem;
  color: var(--color-sub);
  padding: 8px 0 8px 22px;
  position: relative;
  border-bottom: 1px dashed var(--color-border);
}

.service-block__body ul li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 8px;
  color: var(--color-accent);
  font-size: 0.7rem;
}


/* ステップ（制作の流れ） */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  counter-reset: step;
}

.step {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 20px 22px 24px;
  box-shadow: var(--shadow-soft);
  position: relative;
}

.step::before {
  counter-increment: step;
  content: "STEP " counter(step);
  display: inline-block;
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--color-sub);
  line-height: 1.9;
}


/* 料金表 */
.price-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-card);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  margin-bottom: 32px;
}

.price-table th,
.price-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}

.price-table thead th {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.price-table tbody th {
  background-color: var(--color-bg);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.price-table tbody tr:last-child th,
.price-table tbody tr:last-child td {
  border-bottom: none;
}

.price-table .price-cell {
  color: var(--color-accent);
  font-weight: 700;
  font-family: "Playfair Display", serif;
  font-size: 1.05rem;
}

/* FAQ（アコーディオン風の見た目だけ） */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px 20px;
  box-shadow: var(--shadow-soft);
}

.faq-item summary {
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-left: 28px;
}

.faq-item summary::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Playfair Display", serif;
  font-style: italic;
  color: var(--color-accent);
  font-weight: 700;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item[open] summary {
  margin-bottom: 12px;
}

.faq-item .faq-body {
  font-size: 0.9rem;
  color: var(--color-sub);
  line-height: 1.9;
  padding-left: 28px;
  position: relative;
}

.faq-item .faq-body::before {
  content: "A";
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Playfair Display", serif;
  font-style: italic;
  color: var(--color-accent);
  font-weight: 700;
}


/* =========================================================
   6. ポートフォリオ（works）
========================================================= */

.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.work-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex;
  flex-direction: column;
}

.work-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.work-card__img {
  position: relative;
  overflow: hidden;
}

.work-card__img img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .4s ease;
}

.work-card:hover .work-card__img img {
  transform: scale(1.04);
}

.work-card__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.work-card__body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.work-card__body h3 {
  font-size: 1.15rem;
  margin-bottom: 2px;
}

.work-card__meta {
  font-size: 0.78rem;
  color: var(--color-sub);
  letter-spacing: 0.03em;
}

.work-card__body p {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.8;
  flex: 1;
}

.work-card__cta {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  align-self: flex-start;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.work-card__cta:hover {
  opacity: 1;
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

/* 制作中プレースホルダ */
.work-card--placeholder {
  border: 1px dashed var(--color-border);
  background-color: transparent;
  box-shadow: none;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  text-align: center;
  min-height: 300px;
}

.work-card--placeholder h3 {
  font-size: 1.05rem;
  color: var(--color-sub);
  margin-bottom: 6px;
}

.work-card--placeholder p {
  font-size: 0.85rem;
  color: var(--color-sub);
}


/* =========================================================
   7. 4種別タブ切替フォーム
========================================================= */

.form-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 32px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 8px;
}

@media (min-width: 640px) {
  .form-tabs {
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
  }
}

.form-tab-btn {
  padding: 14px 12px;
  background-color: transparent;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-sub);
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease;
  text-align: center;
  line-height: 1.35;
}

.form-tab-btn:hover {
  color: var(--color-text);
}

.form-tab-btn.is-active {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  font-weight: 600;
}

.form-tab-btn .tab-icon {
  display: block;
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.form-tab-btn small {
  display: block;
  font-size: 0.68rem;
  opacity: 0.85;
  margin-top: 2px;
  font-weight: 400;
}

/* タブの中身 */
.form-tab-content {
  display: none;
}

.form-tab-content.is-active {
  display: block;
}

.tab-intro {
  background-color: var(--color-card);
  border-left: 4px solid var(--color-accent);
  padding: 16px 20px;
  margin-bottom: 28px;
  border-radius: 4px;
  box-shadow: var(--shadow-soft);
}

.tab-intro h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--color-text);
}

.tab-intro p {
  font-size: 0.9rem;
  color: var(--color-sub);
  line-height: 1.75;
}

/* チェックボックス＆ラジオグループ */
.checkbox-group,
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox-group label,
.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 400;
  cursor: pointer;
  margin: 0;
  transition: border-color .2s ease, background-color .2s ease;
}

.checkbox-group label:hover,
.radio-group label:hover {
  border-color: var(--color-accent);
}

.checkbox-group input[type="checkbox"],
.radio-group input[type="radio"] {
  margin: 0;
  width: auto;
  accent-color: var(--color-accent);
}


/* =========================================================
   8. ボタン・フォーム
========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .15s ease;
  text-align: center;
}

.btn:hover {
  transform: translateY(-1px);
  opacity: 1;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg-dark);
  border-color: var(--color-accent);
  font-weight: 700;
}

.btn--primary:hover {
  background-color: transparent;
  color: var(--color-accent);
}

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

.btn--outline:hover {
  background-color: var(--color-text-inv);
  color: var(--color-bg-dark);
}

.btn--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  border-color: var(--color-bg-dark);
}

.btn--dark:hover {
  background-color: transparent;
  color: var(--color-bg-dark);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

/* フォーム */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group label .required {
  color: var(--color-accent);
  margin-left: 4px;
  font-size: 0.75rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-card);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color .2s ease;
}

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

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.78rem;
  color: var(--color-sub);
  margin-top: 6px;
  display: block;
}


/* =========================================================
   9. フッター／下部固定CTA
========================================================= */

.site-footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  padding: 56px 0 24px;
  margin-top: 80px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--color-accent);
}

.footer-col p,
.footer-col a,
.footer-col li {
  font-size: 0.85rem;
  color: var(--color-text-inv);
  opacity: 0.9;
  line-height: 1.9;
  list-style: none;
}

.footer-col a:hover {
  opacity: 1;
}

.footer-brand-lead {
  font-family: "Playfair Display", "Noto Serif JP", serif;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.15);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-inv);
  opacity: 0.65;
  line-height: 1.7;
}

/* 下部固定CTA（全ページ表示） */
.fixed-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background-color: var(--color-bg-dark);
  color: var(--color-text-inv);
  padding: 12px 16px;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.15);
}

.fixed-cta-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.fixed-cta p {
  font-size: 0.85rem;
  line-height: 1.3;
  color: var(--color-text-inv);
  flex: 1;
}

.fixed-cta p strong {
  color: var(--color-accent);
}

.fixed-cta .btn {
  padding: 10px 18px;
  font-size: 0.82rem;
  white-space: nowrap;
}


/* =========================================================
   10. 2列レイアウト／ユーティリティ
========================================================= */

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }

.accent { color: var(--color-accent); }


/* =========================================================
   11. レスポンシブ調整
========================================================= */

@media (min-width: 768px) {
  .section { padding: 96px 0; }
  .section-title h2 { font-size: 2.2rem; }

  .hero-inner h1 { font-size: 2.8rem; }
  .hero-inner p { font-size: 1.1rem; }
  .hero--sub h1 { font-size: 2.1rem; }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .promise-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .service-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
  }

  .service-block__img img {
    height: 100%;
    min-height: 280px;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

  .two-col {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
  }

  .fixed-cta p {
    font-size: 1rem;
  }

  .price-hero .price-num { font-size: 4.5rem; }
  .price-hero .price-unit { font-size: 1.6rem; }
}

@media (min-width: 1024px) {
  .nav-desktop { display: flex; }
  .header-tel { display: inline-flex; flex-direction: column; }
  .hamburger { display: none; }
  .nav-mobile { display: none !important; }

  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .works-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps {
    grid-template-columns: repeat(5, 1fr);
  }

  .hero-inner h1 { font-size: 3.2rem; }
}

/* ==========================================================
   スマホ（〜767px）用の微調整：価格ヒーロー＆料金表（2026-04-25追加）
========================================================== */
@media (max-width: 767px) {
  /* 価格ヒーロー（index.html トップの大きな料金表示） */
  .price-hero { padding: 32px 20px; }
  .price-hero .price-num { font-size: 2.8rem; }
  .price-hero .price-unit { font-size: 1.05rem; }
  .price-hero .price-caption { font-size: 0.88rem; line-height: 1.85; }

  /* 料金表：スマホではカード型に変換 */
  .price-table,
  .price-table tbody,
  .price-table tr,
  .price-table th,
  .price-table td {
    display: block;
    width: 100%;
  }
  .price-table {
    border: none;
    background: transparent;
    box-shadow: none;
    margin-bottom: 24px;
  }
  .price-table thead { display: none; }
  .price-table tbody tr {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    margin-bottom: 14px;
    padding: 18px 20px;
  }
  .price-table tbody th {
    background: transparent;
    padding: 0 0 12px 0;
    font-size: 1.08rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 12px;
    white-space: normal;
    color: var(--color-text);
  }
  .price-table tbody td {
    padding: 6px 0;
    border: none;
    font-size: 0.95rem;
  }
  .price-table tbody td::before {
    content: attr(data-label) "：";
    font-weight: 600;
    color: var(--color-sub);
    margin-right: 6px;
  }
  .price-table tbody td.price-cell {
    padding: 8px 0;
    font-size: 1.35rem;
    margin-top: 4px;
  }
}