/* ===================================
   こぎん刺し工房 - 共通スタイル
   =================================== */

/* カラー変数 */
:root {
  --ai: #1a3a5c;           /* 藍色 */
  --ai-light: #2e5f8a;     /* 淡藍 */
  --ai-pale: #d4e4f0;      /* 水色 */
  --kinari: #f5f0e8;       /* 生成り */
  --kinari-dark: #e8dfc8;  /* 濃い生成り */
  --akane: #9b2335;        /* 茜色 */
  --akane-light: #c44d5e;  /* 淡茜 */
  --text: #2c2c2c;         /* 本文色 */
  --text-sub: #666;        /* サブテキスト */
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.18);
  --radius: 4px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  background-color: var(--kinari);
  color: var(--text);
  line-height: 1.8;
}

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

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

ul, ol {
  list-style: none;
}

/* ===================================
   ヘッダー / ナビゲーション
   =================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 58, 92, 0.95);
  backdrop-filter: blur(8px);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}

.site-logo {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.site-logo .name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.15em;
}

.site-logo .en {
  font-size: 0.65rem;
  color: var(--ai-pale);
  letter-spacing: 0.2em;
  font-weight: 400;
}

.site-nav ul {
  display: flex;
  gap: 0.2rem;
}

.site-nav a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--ai-pale);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  position: relative;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background: var(--akane-light);
  transition: width var(--transition);
}

.site-nav a:hover {
  color: var(--white);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  width: 60%;
}

.site-nav a.active {
  color: var(--white);
}

/* ハンバーガー（モバイル） */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
  transform-origin: center;
}

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

/* ===================================
   ページ共通コンテナ
   =================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.page-main {
  padding-top: 68px;
}

/* ===================================
   フッター
   =================================== */
.site-footer {
  background: var(--ai);
  color: var(--ai-pale);
  text-align: center;
  padding: 2.5rem 2rem;
  margin-top: 5rem;
}

.site-footer .footer-logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.site-footer .footer-copy {
  font-size: 0.75rem;
  color: var(--ai-pale);
  letter-spacing: 0.1em;
}

/* ===================================
   フェードインアニメーション
   =================================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ===================================
   セクション共通
   =================================== */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--ai);
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 0.8rem;
  color: var(--text-sub);
  letter-spacing: 0.25em;
  font-weight: 400;
}

.section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 1rem auto 0;
}

.section-divider::before,
.section-divider::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: var(--akane);
  opacity: 0.5;
}

.section-divider .motif {
  width: 8px;
  height: 8px;
  background: var(--akane);
  transform: rotate(45deg);
}

/* ===================================
   ボタン
   =================================== */
.btn {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--ai);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(26,58,92,0.3);
}

.btn-primary:hover {
  background: var(--ai-light);
  box-shadow: 0 6px 24px rgba(26,58,92,0.4);
}

.btn-outline {
  background: transparent;
  color: var(--ai);
  border: 1.5px solid var(--ai);
}

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

.btn-akane {
  background: var(--akane);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(155,35,53,0.25);
}

.btn-akane:hover {
  background: var(--akane-light);
  box-shadow: 0 6px 24px rgba(155,35,53,0.35);
}

/* ===================================
   ページヒーロー（gallery/history/about共通）
   =================================== */
.page-hero {
  background: linear-gradient(135deg, var(--ai) 0%, var(--ai-light) 100%);
  color: var(--white);
  text-align: center;
  padding: 5rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 20px,
      rgba(255,255,255,0.015) 20px,
      rgba(255,255,255,0.015) 21px
    );
}

.page-hero-title {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
  position: relative;
}

.page-hero-subtitle {
  font-size: 0.85rem;
  color: var(--ai-pale);
  letter-spacing: 0.3em;
  font-weight: 400;
  position: relative;
}

/* ===================================
   お問い合わせフォーム（共通）
   =================================== */
.contact-section {
  background: var(--ai);
  color: var(--white);
  padding: 5rem 2rem;
}

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

.contact-section .section-subtitle {
  color: var(--ai-pale);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  color: var(--ai-pale);
}

.form-group label .required {
  color: var(--akane-light);
  margin-left: 0.25rem;
  font-size: 0.75rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  color: var(--white);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color var(--transition), background var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.35);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--ai-pale);
  background: rgba(255,255,255,0.12);
}

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

.form-submit {
  text-align: center;
  margin-top: 2rem;
}

/* ===================================
   モーダル（ギャラリー共通）
   =================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--kinari);
  border-radius: 6px;
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  transform: scale(0.92);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-content {
  transform: scale(1);
}

.modal-image-wrap {
  overflow: hidden;
  border-radius: 6px 0 0 6px;
}

.modal-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-body {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-category {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--akane);
  font-weight: 400;
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ai);
  line-height: 1.4;
}

.modal-meta {
  display: grid;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-sub);
}

.modal-meta dt {
  font-weight: 700;
  color: var(--ai);
  display: inline;
}

.modal-meta dd {
  display: inline;
  margin-left: 0.25rem;
}

.modal-desc {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.9;
  border-top: 1px solid var(--kinari-dark);
  padding-top: 1rem;
  flex: 1;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0,0,0,0.6);
  border: none;
  color: var(--white);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  line-height: 1;
}

.modal-close:hover {
  background: var(--akane);
}

/* ===================================
   パンくずリスト
   =================================== */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.78rem;
  color: var(--text-sub);
  letter-spacing: 0.05em;
}

.breadcrumb a {
  color: var(--ai-light);
}

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

.breadcrumb span {
  margin: 0 0.4rem;
}

/* ===================================
   スクロールトップボタン
   =================================== */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  background: var(--ai);
  color: var(--white);
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  pointer-events: none;
}

.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--ai-light);
}

/* ===================================
   レスポンシブ
   =================================== */
@media (max-width: 768px) {
  .site-header {
    padding: 0 1.2rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--ai);
    padding: 1.5rem;
    transform: translateY(-110%);
    transition: transform var(--transition);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  }

  .site-nav.open {
    transform: translateY(0);
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.25rem;
  }

  .site-nav a {
    font-size: 1rem;
    padding: 0.75rem 1rem;
  }

  .modal-content {
    grid-template-columns: 1fr;
    max-height: 85vh;
  }

  .modal-image-wrap {
    height: 240px;
    border-radius: 6px 6px 0 0;
  }

  .modal-close {
    top: 0.5rem;
    right: 0.5rem;
  }

  .container {
    padding: 0 1.2rem;
  }
}

@media (max-width: 480px) {
  .page-hero {
    padding: 4rem 1.2rem 3rem;
  }
}