/* ==============================================
   北海調味 / 炭火焼香油 - メインスタイルシート
   ============================================== */

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

:root {
  --color-black:   #1a1a1a;
  --color-dark:    #2c2c2c;
  --color-charcoal:#3d3d3d;
  --color-ember:   #c0392b;
  --color-amber:   #e8a020;
  --color-cream:   #faf8f3;
  --color-offwhite:#f2ede4;
  --color-smoke:   #7a7068;
  --color-white:   #ffffff;

  --font-jp:   'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  --font-en:   'Cormorant Garamond', 'Garamond', serif;
  --font-body: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;

  --nav-h: 64px;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-black);
  background: var(--color-cream);
  -webkit-font-smoothing: antialiased;
}

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

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

/* --- ナビゲーション --- */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(26,26,26,0.96);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  border-bottom: 1px solid rgba(200,160,80,0.25);
}

#nav .nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

#nav .nav-logo img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

#nav .nav-logo-text {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--color-amber);
  text-transform: uppercase;
}

#nav ul {
  list-style: none;
  display: flex;
  gap: 0;
  align-items: center;
}

#nav ul li a {
  display: block;
  padding: 8px 16px;
  font-family: var(--font-jp);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.82);
  transition: color 0.2s;
  white-space: nowrap;
}

#nav ul li a:hover,
#nav ul li a.active {
  color: var(--color-amber);
}

#nav ul li.rakuten a {
  margin-left: 8px;
  padding: 6px 14px;
  border: 1px solid var(--color-ember);
  border-radius: 2px;
  color: var(--color-white);
  font-size: 12px;
  transition: background 0.2s;
}

#nav ul li.rakuten a:hover {
  background: var(--color-ember);
}

/* ハンバーガーボタン */
#hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
#hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all 0.3s;
}
#hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
#hamburger.open span:nth-child(2) { opacity: 0; }
#hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* モバイルメニュー */
#mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(20,20,20,0.98);
  z-index: 999;
  padding: 16px 0;
  border-bottom: 1px solid rgba(200,160,80,0.2);
}
#mobile-menu.open { display: block; }
#mobile-menu ul { list-style: none; }
#mobile-menu ul li a {
  display: block;
  padding: 14px 32px;
  font-family: var(--font-jp);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.85);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color 0.2s, padding-left 0.2s;
}
#mobile-menu ul li a:hover { color: var(--color-amber); padding-left: 40px; }

/* --- ページ共通レイアウト --- */
.page-wrapper { padding-top: var(--nav-h); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

/* --- セクション共通 --- */
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }

.eyebrow {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-jp);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0.06em;
  color: var(--color-dark);
}

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

/* --- ヒーローセクション (ホーム) --- */
#hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  background: var(--color-black);
  display: flex;
  align-items: center;
  overflow: hidden;
}

#hero .hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../img/hero_main.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.45;
  transform: scale(1.04);
  transition: transform 8s ease;
}

#hero .hero-bg.loaded { transform: scale(1.0); }

#hero .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10,8,5,0.72) 0%,
    rgba(20,12,4,0.4) 60%,
    rgba(40,20,5,0.55) 100%
  );
}

#hero .hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 80px 32px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
}

#hero .hero-en {
  font-family: var(--font-en);
  font-size: clamp(44px, 7vw, 88px);
  font-weight: 300;
  letter-spacing: 0.14em;
  color: var(--color-white);
  line-height: 1.1;
  text-transform: uppercase;
}

#hero .hero-en span {
  color: var(--color-amber);
}

#hero .hero-jp {
  margin-top: 20px;
  font-family: var(--font-jp);
  font-size: clamp(14px, 2vw, 17px);
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.2em;
  line-height: 2;
}

#hero .hero-sub {
  margin-top: 8px;
  font-family: var(--font-jp);
  font-size: clamp(13px, 1.5vw, 15px);
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.15em;
}

#hero .hero-cta {
  margin-top: 48px;
  display: inline-block;
  padding: 14px 40px;
  border: 1px solid var(--color-amber);
  font-family: var(--font-jp);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--color-amber);
  transition: background 0.25s, color 0.25s;
}
#hero .hero-cta:hover {
  background: var(--color-amber);
  color: var(--color-black);
}

/* --- アバウトセクション (ホーム) --- */
#home-about {
  background: var(--color-cream);
}

#home-about .about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

#home-about .about-text {}

#home-about .about-text p {
  margin-top: 20px;
  font-size: 15px;
  line-height: 2;
  color: var(--color-charcoal);
}

#home-about .about-text .read-more {
  display: inline-block;
  margin-top: 28px;
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-ember);
  border-bottom: 1px solid var(--color-ember);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}
#home-about .about-text .read-more:hover { opacity: 0.65; }

#home-about .about-img {
  position: relative;
}
#home-about .about-img img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 8px 16px 48px rgba(0,0,0,0.18);
}

#home-about .about-img::before {
  content: '';
  position: absolute;
  top: -16px; right: -16px;
  bottom: 16px; left: 16px;
  border: 1px solid rgba(200,160,80,0.3);
  border-radius: 2px;
  pointer-events: none;
}

/* --- ページヒーロー (サブページ共通) --- */
.page-hero {
  position: relative;
  height: 340px;
  background: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-hero .page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.38;
}

.page-hero .page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.35), rgba(0,0,0,0.6));
}

.page-hero .page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-hero .page-hero-content .eyebrow {
  margin-bottom: 10px;
}

.page-hero .page-hero-content h1 {
  font-family: var(--font-jp);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-white);
}

/* --- 炭火焼香油とはページ --- */
#about-intro .about-intro-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

#about-intro .about-intro-inner p {
  font-size: 16px;
  line-height: 2.1;
  color: var(--color-charcoal);
  margin-top: 24px;
}

#about-usage {
  background: var(--color-offwhite);
}

#about-usage .usage-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

#about-usage .usage-text p {
  margin-top: 20px;
  font-size: 15px;
  line-height: 2;
  color: var(--color-charcoal);
}

#about-usage .usage-text .usage-note {
  margin-top: 24px;
  padding: 20px 24px;
  border-left: 3px solid var(--color-amber);
  background: rgba(232,160,32,0.06);
  font-size: 13px;
  line-height: 2;
  color: var(--color-smoke);
}

#about-usage .usage-img img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 8px 16px 48px rgba(0,0,0,0.14);
}

/* --- 商品一覧ページ --- */
#product-list {
  background: var(--color-cream);
}

.product-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 64px;
  align-items: start;
  max-width: 860px;
  margin: 0 auto;
  background: var(--color-white);
  padding: 48px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.08);
  border-radius: 2px;
}

.product-card-img {
  width: 280px;
  flex-shrink: 0;
}

.product-card-img img {
  width: 100%;
  border-radius: 2px;
}

.product-card-info {}

.product-card-info h2 {
  font-family: var(--font-jp);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-dark);
  margin-bottom: 28px;
}

.product-spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.product-spec-table tr {
  border-bottom: 1px solid var(--color-offwhite);
}

.product-spec-table th {
  text-align: left;
  padding: 12px 16px 12px 0;
  color: var(--color-smoke);
  font-weight: 400;
  white-space: nowrap;
  width: 130px;
  font-size: 13px;
}

.product-spec-table td {
  padding: 12px 0;
  color: var(--color-dark);
  font-weight: 500;
}

.product-price {
  margin-top: 28px;
  font-family: var(--font-en);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-dark);
  letter-spacing: 0.05em;
}

.product-price .tax {
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--color-smoke);
  margin-left: 6px;
  font-weight: 400;
}

.product-card-info .rakuten-link {
  display: inline-block;
  margin-top: 28px;
  padding: 14px 36px;
  background: var(--color-ember);
  color: var(--color-white);
  font-family: var(--font-jp);
  font-size: 14px;
  letter-spacing: 0.15em;
  border-radius: 2px;
  transition: opacity 0.2s;
}
.product-card-info .rakuten-link:hover { opacity: 0.82; }

/* --- 会社概要ページ --- */
#company-info {
  background: var(--color-cream);
}

.company-table-wrap {
  max-width: 680px;
  margin: 40px auto 0;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.company-table tr {
  border-bottom: 1px solid rgba(0,0,0,0.07);
}

.company-table th {
  text-align: left;
  padding: 20px 24px 20px 0;
  color: var(--color-smoke);
  font-weight: 400;
  white-space: nowrap;
  width: 160px;
  font-size: 14px;
}

.company-table td {
  padding: 20px 0;
  color: var(--color-dark);
  line-height: 1.7;
}

.company-table td a {
  color: var(--color-ember);
  text-decoration: underline;
}

/* --- お問い合わせページ --- */
#contact-section {
  background: var(--color-cream);
}

#contact-section .contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-form-wrap {}

.contact-form-wrap h2 {
  font-family: var(--font-jp);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-dark);
  margin-bottom: 32px;
}

.contact-form .form-group {
  margin-bottom: 20px;
}

.contact-form label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-smoke);
  margin-bottom: 6px;
}

.contact-form label .required {
  color: var(--color-ember);
  margin-left: 4px;
  font-size: 11px;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-dark);
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.14);
  border-radius: 2px;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-amber);
  box-shadow: 0 0 0 3px rgba(232,160,32,0.12);
}

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

.contact-form .submit-btn {
  display: inline-block;
  width: 100%;
  padding: 15px;
  background: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-jp);
  font-size: 15px;
  letter-spacing: 0.2em;
  border: none;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s;
  margin-top: 8px;
}
.contact-form .submit-btn:hover { background: var(--color-charcoal); }

.form-success {
  display: none;
  padding: 16px 20px;
  background: rgba(80,160,80,0.1);
  border: 1px solid rgba(80,160,80,0.3);
  border-radius: 2px;
  color: #2d7a2d;
  font-size: 14px;
  margin-top: 12px;
}

.contact-img-wrap img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 8px 16px 48px rgba(0,0,0,0.14);
}

/* 区切りライン */
.divider {
  width: 48px;
  height: 2px;
  background: linear-gradient(to right, var(--color-amber), var(--color-ember));
  margin: 20px 0;
}

.divider--center { margin: 20px auto; }

/* --- フッター --- */
#footer {
  background: var(--color-black);
  border-top: 1px solid rgba(200,160,80,0.2);
  padding: 56px 32px 32px;
}

#footer .footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}

#footer .footer-brand img {
  height: 100px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.1);
}

#footer .footer-brand .brand-name {
  margin-top: 12px;
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--color-amber);
  text-transform: uppercase;
}

#footer .footer-links h4 {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: 16px;
}

#footer .footer-links ul {
  list-style: none;
}

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

#footer .footer-links ul li a {
  font-family: var(--font-jp);
  font-size: 13px;
  color: rgba(255,255,255,0.58);
  transition: color 0.2s;
}

#footer .footer-links ul li a:hover { color: var(--color-amber); }

#footer .footer-contact h4 {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: 16px;
}

#footer .footer-contact p {
  font-size: 13px;
  color: rgba(255,255,255,0.58);
  line-height: 2;
}

#footer .footer-contact a {
  color: rgba(255,255,255,0.75);
  transition: color 0.2s;
}
#footer .footer-contact a:hover { color: var(--color-amber); }

#footer .footer-bottom {
  max-width: var(--max-w);
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-en);
}

/* --- 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);
}

/* --- レスポンシブ --- */
@media (max-width: 900px) {
  #nav ul { display: none; }
  #hamburger { display: flex; }

  #home-about .about-inner,
  #about-usage .usage-inner,
  #contact-section .contact-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  #home-about .about-img img,
  #about-usage .usage-img img {
    height: 300px;
  }

  .product-card {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .product-card-img { width: 100%; max-width: 280px; margin: 0 auto; }

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

@media (max-width: 600px) {
  .container { padding: 0 20px; }
  #nav { padding: 0 20px; }
  .section { padding: 56px 0; }
  #hero .hero-content { padding: 60px 20px; }
  .page-hero { height: 240px; }
  .contact-img-wrap { display: none; }
}

/* --- プレースホルダー (画像が読み込めない場合) --- */
.img-placeholder {
  background: linear-gradient(135deg, #2a2018 0%, #3d2e1a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(200,160,80,0.4);
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.error{
  color: red;
}