/* ========================================
   GRANT株式会社 - 共通スタイルシート
   カラーテーマ: レッド × ライトグレー
   ======================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@400;700&display=swap');

/* --- リセット & ベース --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --red-primary:   #C0392B;
  --red-dark:      #922B21;
  --red-light:     #E74C3C;
  --gray-light:    #F4F4F4;
  --gray-mid:      #CCCCCC;
  --gray-dark:     #555555;
  --dark:          #222222;
  --white:         #FFFFFF;
  --nav-bg:        #1A1A1A;
  --font-sans:     'Noto Sans JP', sans-serif;
  --font-serif:    'Noto Serif JP', serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--dark);
  background-color: var(--white);
  line-height: 1.8;
  font-size: 15px;
}

a {
  text-decoration: none;
  color: inherit;
}

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

ul {
  list-style: none;
}

/* ========================================
   ナビゲーション
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--nav-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 68px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

.navbar-logo {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.navbar-logo span {
  color: var(--red-light);
}

.navbar-nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.navbar-nav a {
  color: #CCCCCC;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 2px;
  transition: color 0.25s, background 0.25s;
  white-space: nowrap;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--white);
  background-color: var(--red-primary);
}

/* ハンバーガーメニュー（スマホ） */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--white);
  transition: all 0.3s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* モバイルメニュー */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  width: 100%;
  background-color: var(--nav-bg);
  z-index: 999;
  padding: 16px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  color: #CCCCCC;
  padding: 14px 32px;
  font-size: 0.95rem;
  border-bottom: 1px solid #2E2E2E;
  transition: color 0.2s, background 0.2s;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--white);
  background-color: var(--red-primary);
}

/* ========================================
   固定背景ヒーローセクション
   ======================================== */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 500px;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--white);
  padding: 20px;
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.hero-content p {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  letter-spacing: 0.06em;
  margin-bottom: 32px;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: 12px 36px;
  background-color: var(--red-primary);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border: 2px solid var(--red-primary);
  transition: background 0.3s, color 0.3s;
  cursor: pointer;
}

.btn:hover {
  background-color: transparent;
  color: var(--white);
  border-color: var(--white);
}

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

.btn-outline:hover {
  background-color: var(--white);
  color: var(--dark);
}

/* ========================================
   ページ内ヒーロー（サブページ用）
   ======================================== */
.page-hero {
  position: relative;
  width: 100%;
  height: 320px;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-top: 68px;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
}

.page-hero-content {
  position: relative;
  z-index: 1;
  color: var(--white);
}

.page-hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
  margin-bottom: 8px;
}

.page-hero-content p {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  opacity: 0.8;
  color: var(--red-light);
}

/* パンくずリスト */
.breadcrumb {
  background-color: var(--gray-light);
  padding: 12px 40px;
  font-size: 0.8rem;
  color: var(--gray-dark);
  border-bottom: 1px solid var(--gray-mid);
}

.breadcrumb a {
  color: var(--red-primary);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  margin: 0 6px;
}

/* ========================================
   セクション共通
   ======================================== */
.section {
  padding: 80px 40px;
}

.section-lg {
  padding: 100px 40px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--red-primary);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--dark);
}

.section-title-white {
  color: var(--white);
}

.section-divider {
  width: 48px;
  height: 3px;
  background-color: var(--red-primary);
  margin-bottom: 32px;
}

.section-divider-center {
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  color: var(--gray-dark);
  font-size: 0.95rem;
  max-width: 640px;
  margin-bottom: 48px;
}

.text-center {
  text-align: center;
}

/* ========================================
   背景帯（固定背景）- 中間セクション用
   ======================================== */
.parallax-section {
  position: relative;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  padding: 100px 40px;
  text-align: center;
  color: var(--white);
}

.parallax-section .parallax-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.65);
}

.parallax-section .parallax-content {
  position: relative;
  z-index: 1;
}

/* ========================================
   カードグリッド
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.card {
  background-color: var(--white);
  border: 1px solid #E5E5E5;
  border-top: 4px solid var(--red-primary);
  padding: 36px 28px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.card-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--red-primary);
}

.card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--dark);
}

.card p {
  font-size: 0.9rem;
  color: var(--gray-dark);
  line-height: 1.9;
}

/* ========================================
   会社概要テーブル
   ======================================== */
.company-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 40px;
}

.company-table th,
.company-table td {
  padding: 18px 24px;
  border-bottom: 1px solid #E5E5E5;
  font-size: 0.92rem;
  text-align: left;
  vertical-align: top;
}

.company-table th {
  width: 180px;
  background-color: var(--gray-light);
  color: var(--dark);
  font-weight: 700;
  white-space: nowrap;
}

.company-table td {
  color: var(--gray-dark);
}

.company-table tr:first-child th,
.company-table tr:first-child td {
  border-top: 2px solid var(--red-primary);
}

/* ========================================
   代表挨拶
   ======================================== */
.greeting-block {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 60px;
  align-items: start;
  margin-top: 48px;
}

.greeting-photo {
  background: linear-gradient(135deg, #CCCCCC 0%, #AAAAAA 100%);
  width: 100%;
  aspect-ratio: 3/4;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #888;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-align: center;
}

.greeting-text h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.greeting-text .title {
  font-size: 0.82rem;
  color: var(--red-primary);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  font-weight: 700;
}

.greeting-text p {
  font-size: 0.92rem;
  color: var(--gray-dark);
  line-height: 2;
  margin-bottom: 16px;
}

.greeting-signature {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--dark);
  margin-top: 32px;
}

/* ========================================
   事業内容
   ======================================== */
.business-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 60px;
  border: 1px solid #E5E5E5;
  overflow: hidden;
}

.business-item {
  padding: 60px 48px;
}

.business-item:first-child {
  border-right: 1px solid #E5E5E5;
  background-color: var(--white);
}

.business-item:last-child {
  background-color: var(--gray-light);
}

.business-icon {
  font-size: 3rem;
  margin-bottom: 24px;
  color: var(--red-primary);
}

.business-item h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.business-item .en-title {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: var(--red-primary);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.business-item p {
  font-size: 0.92rem;
  color: var(--gray-dark);
  line-height: 2;
  margin-bottom: 24px;
}

.service-list {
  margin-top: 16px;
}

.service-list li {
  font-size: 0.88rem;
  color: var(--gray-dark);
  padding: 8px 0;
  border-bottom: 1px dashed #DDDDDD;
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-list li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--red-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ========================================
   社員紹介
   ======================================== */
.staff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 36px;
  margin-top: 48px;
}

.staff-card {
  text-align: center;
  background-color: var(--white);
  border: 1px solid #E5E5E5;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.staff-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.staff-photo {
  width: 100%;
  aspect-ratio: 1/1;
  background: linear-gradient(135deg, #CCCCCC 0%, #AAAAAA 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--white);
  overflow: hidden;
  position: relative;
}

.staff-photo-placeholder {
  font-size: 0.8rem;
  color: #999;
  text-align: center;
}

.staff-info {
  padding: 24px 20px;
}

.staff-info .dept {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--red-primary);
  font-weight: 700;
  margin-bottom: 8px;
}

.staff-info h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.staff-info .name-ruby {
  font-size: 0.75rem;
  color: var(--gray-dark);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.staff-info .role {
  font-size: 0.8rem;
  color: var(--gray-dark);
  font-weight: 500;
  margin-bottom: 12px;
  padding: 3px 12px;
  background-color: var(--gray-light);
  display: inline-block;
}

.staff-info p {
  font-size: 0.82rem;
  color: var(--gray-dark);
  line-height: 1.8;
  text-align: left;
}

/* ========================================
   フッター
   ======================================== */
footer {
  background-color: var(--nav-bg);
  color: #AAAAAA;
  padding: 60px 40px 30px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.footer-brand h3 span {
  color: var(--red-light);
}

.footer-brand p {
  font-size: 0.82rem;
  line-height: 1.9;
  color: #888;
}

.footer-nav h4 {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--white);
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #333;
}

.footer-nav ul li {
  margin-bottom: 10px;
}

.footer-nav ul li a {
  font-size: 0.83rem;
  color: #888;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-nav ul li a::before {
  content: '›';
  color: var(--red-primary);
}

.footer-nav ul li a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid #2E2E2E;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: #666;
}

/* ========================================
   グレー背景セクション
   ======================================== */
.bg-gray {
  background-color: var(--gray-light);
}

.bg-dark {
  background-color: var(--dark);
  color: var(--white);
}

.bg-red {
  background-color: var(--red-primary);
  color: var(--white);
}

/* ========================================
   スクロールアニメーション
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   レスポンシブ（スマホ対応）
   ======================================== */
@media (max-width: 768px) {
  .navbar {
    padding: 0 20px;
  }

  .navbar-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .section, .section-lg {
    padding: 56px 20px;
  }

  .parallax-section {
    padding: 72px 20px;
    /* iOSでは fixed background が効かないため scroll に */
    background-attachment: scroll;
  }

  .hero {
    background-attachment: scroll;
    height: 90vh;
  }

  .page-hero {
    background-attachment: scroll;
    height: 240px;
  }

  .breadcrumb {
    padding: 10px 20px;
  }

  .greeting-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .greeting-photo {
    max-width: 200px;
    margin: 0 auto;
  }

  .business-block {
    grid-template-columns: 1fr;
  }

  .business-item:first-child {
    border-right: none;
    border-bottom: 1px solid #E5E5E5;
  }

  .business-item {
    padding: 40px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .company-table th {
    width: 100px;
    padding: 14px 12px;
  }

  .company-table td {
    padding: 14px 12px;
  }
}

@media (max-width: 480px) {
  .staff-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

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