/* =========================================================
   株式会社 伊七郎 コーポレートサイト
   デザイントークン
   - 藍鉄   #212932  … 基調色（コーポレートカラー）
   - 深藍   #181E25  … より暗い帯・フッター
   - 生成り #F3EEE3  … 紙のような明るい面
   - 金     #B79A5B  … アクセント（熟成の金）
   - 朱     #A3372E  … 落款の朱（ごく小さな点でのみ使用）
   ========================================================= */

:root {
  --navy: #212932;
  --navy-deep: #181e25;
  --kinari: #f3eee3;
  --kinari-dim: #e8e1d2;
  --gold: #b79a5b;
  --gold-soft: #cdb47c;
  --shu: #a3372e;
  --sumi: #26221d;
  --line-on-dark: rgba(243, 238, 227, 0.18);
  --line-on-light: rgba(38, 34, 29, 0.16);

  --font-display: "Shippori Mincho B1", "Noto Serif JP", serif;
  --font-body: "Noto Serif JP", serif;
  --font-utility: "Zen Kaku Gothic New", sans-serif;

  --max-width: 1120px;
  --pad-x: clamp(20px, 5vw, 48px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--kinari);
  background: var(--navy);
  line-height: 1.9;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ---------- ユーティリティ ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

.eyebrow {
  font-family: var(--font-utility);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}

/* 落款風の朱色の小さな四角。セクション見出しの印。 */
.eyebrow::before {
  content: "";
  width: 0.62em;
  height: 0.62em;
  background: var(--shu);
  flex: none;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.5;
  letter-spacing: 0.08em;
  margin-top: 0.8em;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-utility);
  font-size: 0.92rem;
  letter-spacing: 0.22em;
  padding: 1em 2.6em;
  border: 1px solid var(--gold);
  color: var(--gold-soft);
  background: transparent;
  transition: background-color 0.35s ease, color 0.35s ease;
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  background: var(--gold);
  color: var(--navy-deep);
}

.btn--solid {
  background: var(--gold);
  color: var(--navy-deep);
}

.btn--solid:hover,
.btn--solid:focus-visible {
  background: var(--gold-soft);
}

/* 明るい面（生成り）で使うボタン */
.btn--on-light {
  border-color: var(--sumi);
  color: var(--sumi);
}

.btn--on-light:hover,
.btn--on-light:focus-visible {
  background: var(--sumi);
  color: var(--kinari);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(24, 30, 37, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-on-dark);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.24em;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.site-logo__mark {
  height: 48px;
  width: auto;
}

.site-logo small {
  font-family: var(--font-utility);
  font-weight: 400;
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--gold-soft);
  display: block;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 36px);
}

.site-nav a {
  font-family: var(--font-utility);
  font-size: 0.88rem;
  letter-spacing: 0.18em;
  padding: 0.4em 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

.site-nav .nav-cta {
  border: 1px solid var(--gold);
  padding: 0.55em 1.4em;
  color: var(--gold-soft);
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  background: var(--gold);
  color: var(--navy-deep);
  border-bottom-color: var(--gold);
}

/* ハンバーガー（モバイル） */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-on-dark);
  color: var(--kinari);
  font-family: var(--font-utility);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  padding: 0.5em 1em;
  cursor: pointer;
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    right: 0;
    left: 0;
    background: var(--navy-deep);
    border-bottom: 1px solid var(--line-on-dark);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px var(--pad-x) 24px;
    display: none;
  }

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

  .site-nav a {
    padding: 1em 0;
    border-bottom: 1px solid var(--line-on-dark);
  }

  .site-nav .nav-cta {
    margin-top: 16px;
    text-align: center;
    border-bottom: 1px solid var(--gold);
  }
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("../images/hero-bg.jpg") center 40% / cover no-repeat;
}

/* 紺のオーバーレイ。写真の温かみを残しつつ文字を立たせる */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    100deg,
    rgba(24, 30, 37, 0.92) 0%,
    rgba(24, 30, 37, 0.72) 45%,
    rgba(33, 41, 50, 0.42) 100%
  );
}

.hero__inner {
  width: 100%;
  padding: 140px var(--pad-x) 96px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 48px;
}

/* 縦書きの主見出し —— このサイトの「顔」 */
.hero__title {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  letter-spacing: 0.34em;
  line-height: 1.9;
  height: min(58svh, 520px);
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.4);
}

.hero__body {
  max-width: 34em;
}

.hero__lead {
  font-size: clamp(0.98rem, 1.8vw, 1.12rem);
  margin-bottom: 2.2em;
}

.hero__lead strong {
  color: var(--gold-soft);
  font-weight: 600;
  white-space: nowrap; /* 「伊七郎（いひちろう）」を途中で改行させない */
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  font-family: var(--font-utility);
  font-size: 0.68rem;
  letter-spacing: 0.34em;
  color: rgba(243, 238, 227, 0.6);
}

@media (max-width: 760px) {
  .hero__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
    padding-top: 120px;
  }

  .hero__title {
    height: auto;
    writing-mode: horizontal-tb;
    letter-spacing: 0.14em;
    line-height: 1.6;
  }
}

/* ---------- セクション共通 ---------- */
.section {
  padding: clamp(72px, 11vw, 130px) 0;
}

.section--paper {
  background: var(--kinari);
  color: var(--sumi);
}

.section--deep {
  background: var(--navy-deep);
}

/* ---------- 商品ライン ---------- */
.lineup-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.lineup-card {
  background: #fdfbf6;
  border: 1px solid var(--line-on-light);
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.lineup-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(38, 34, 29, 0.12);
}

.lineup-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-bottom: 1px solid var(--line-on-light);
}

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

/* 写真のない商品ライン用：文字によるプレート */
.lineup-card__plate {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: var(--kinari);
  border-bottom: 1px solid var(--line-on-light);
}

.lineup-card__plate span {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.7rem;
  letter-spacing: 0.2em;
  border: 1px solid var(--gold);
  padding: 0.6em 1em;
}

.lineup-card__body {
  padding: 26px 26px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.lineup-card__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: 0.12em;
}

.lineup-card__desc {
  font-size: 0.92rem;
  line-height: 1.9;
  flex: 1;
}

.lineup-card__link {
  font-family: var(--font-utility);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--shu);
  align-self: flex-start;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

@media (max-width: 900px) {
  .lineup-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------- 物語（ストーリー帯） ---------- */
.story {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

.story__media {
  border: 1px solid var(--line-on-dark);
  padding: 14px;
}

.story__media img {
  width: 100%;
}

.story__text p + p {
  margin-top: 1.4em;
}

.story__text .btn {
  margin-top: 2.4em;
}

@media (max-width: 860px) {
  .story {
    grid-template-columns: 1fr;
  }
}

/* ---------- 数字で語る熟成 ---------- */
.aging {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-on-light);
  border: 1px solid var(--line-on-light);
}

.aging__item {
  background: var(--kinari);
  padding: 36px 28px;
  text-align: center;
}

.aging__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--navy);
  line-height: 1.2;
}

.aging__num small {
  font-size: 0.45em;
  letter-spacing: 0.2em;
}

.aging__label {
  font-family: var(--font-utility);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  margin-top: 10px;
  color: rgba(38, 34, 29, 0.72);
}

@media (max-width: 760px) {
  .aging {
    grid-template-columns: 1fr;
  }
}

/* ---------- 伊七郎 豊 ---------- */
.yutaka {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

.yutaka__media img {
  width: 100%;
}

.yutaka__text p + p {
  margin-top: 1.4em;
}

@media (max-width: 860px) {
  .yutaka {
    grid-template-columns: 1fr;
  }
}

/* ---------- CTA帯 ---------- */
.cta-band {
  text-align: center;
  padding: clamp(72px, 10vw, 110px) var(--pad-x);
  background:
    linear-gradient(rgba(24, 30, 37, 0.88), rgba(24, 30, 37, 0.88)),
    url("../images/lineup-studio.jpg") center / cover no-repeat;
}

.cta-band .section-title {
  margin-top: 0;
}

.cta-band .btn {
  margin-top: 2.4em;
}

/* ---------- ページヒーロー（下層ページ用） ---------- */
.page-hero {
  padding: 170px var(--pad-x) 80px;
  border-bottom: 1px solid var(--line-on-dark);
  text-align: center;
}

.page-hero .section-title {
  margin-top: 0.6em;
}

/* ---------- 沿革タイムライン ---------- */
.timeline {
  margin-top: 56px;
  border-left: 1px solid var(--line-on-light);
  padding-left: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 44px;
  max-width: 720px;
}

.timeline__item {
  position: relative;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(24px, 4vw, 44px) - 5px);
  top: 0.75em;
  width: 9px;
  height: 9px;
  background: var(--shu);
}

.timeline__year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  color: var(--navy);
}

.timeline__body {
  margin-top: 6px;
  font-size: 0.95rem;
}

/* ---------- 会社概要テーブル ---------- */
.company-table {
  margin-top: 48px;
  width: 100%;
  max-width: 760px;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.company-table th,
.company-table td {
  border-bottom: 1px solid var(--line-on-light);
  padding: 18px 8px;
  text-align: left;
  vertical-align: top;
}

.company-table th {
  font-family: var(--font-utility);
  font-weight: 500;
  letter-spacing: 0.18em;
  width: 10em;
  color: rgba(38, 34, 29, 0.72);
}

@media (max-width: 560px) {
  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
  }

  .company-table th {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .company-table td {
    padding-top: 0;
  }
}

/* ---------- お問い合わせフォーム ---------- */
.contact-lead {
  max-width: 640px;
}

.contact-form {
  margin-top: 56px;
  max-width: 640px;
  display: grid;
  gap: 28px;
}

.form-field label {
  display: block;
  font-family: var(--font-utility);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  margin-bottom: 10px;
  color: rgba(38, 34, 29, 0.75);
}

.form-field .required {
  color: var(--shu);
  margin-left: 0.5em;
  font-size: 0.75rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.9em 1em;
  border: 1px solid var(--line-on-light);
  background: #fdfbf6;
  color: var(--sumi);
}

.form-field textarea {
  min-height: 190px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--gold);
  outline-offset: 0;
}

/* ---------- フッター ---------- */
.site-footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--line-on-dark);
  padding: 64px var(--pad-x) 40px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  align-items: flex-start;
}

.site-footer__nav {
  display: flex;
  gap: 28px;
  font-family: var(--font-utility);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
  color: var(--gold-soft);
}

.site-footer__copy {
  width: 100%;
  margin-top: 40px;
  font-family: var(--font-utility);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: rgba(243, 238, 227, 0.5);
  text-align: center;
}

/* ---------- スクロール時のフェード表示 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .lineup-card,
  .btn,
  .site-nav a {
    transition: none;
  }
}


/* ---------- フォーム送信完了の表示 ---------- */
.form-success {
  display: none;
  max-width: 640px;
  margin-top: 56px;
  border: 1px solid var(--gold);
  background: #fdfbf6;
  padding: 48px 36px;
  text-align: center;
}

.form-success.is-shown {
  display: block;
}

.form-success__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: 0.14em;
  color: var(--navy);
}

.form-success__body {
  margin-top: 1.2em;
  font-size: 0.95rem;
}

.form-error {
  display: none;
  color: var(--shu);
  font-size: 0.9rem;
}

.form-error.is-shown {
  display: block;
}