/* style.css - Ultra High-End Editorial Style */
:root {
  --color-dark: #111;
  --color-gray: #888;
  --color-border: #e6e6e6;
  --color-bg: #fff;
  --color-bg-alt: #fafafa;
  --font-serif: "Yu Mincho", "Hiragino Mincho ProN", "YuMincho", serif;
  --font-sans: "Helvetica Neue", "Arial", sans-serif;
  --easing: cubic-bezier(0.2, 0.8, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  color: var(--color-dark);
  background-color: var(--color-bg);
  line-height: 2.2;
  letter-spacing: 0.08em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* タイポグラフィ・ユーティリティ */
.en-label {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gray);
  display: block;
}

.section {
  padding: 180px 0; /* 大胆な余白 */
}

@media (max-width: 768px) {
  .section {
    padding: 100px 0;
  }
}

.container {
  max-width: 1400px; /* ワイドなコンテナで左右の余白をコントロール */
  margin: 0 auto;
  padding: 0 6vw;
}

/* ヘッダー: ミニマルで透明感のあるデザイン */
.header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 40px 6vw;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo a {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  color: #fff;
  mix-blend-mode: difference;
}

.header__nav ul {
  display: flex;
  gap: 40px;
}

.header__nav a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: #fff;
  mix-blend-mode: difference;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 30px 6vw;
  }
  .header__nav ul {
    gap: 24px;
    flex-wrap: wrap;
  }
  .header__nav a {
    font-size: 0.75rem;
  }
}

/* ヒーローセクション: 絵画のように見せる */
.hero {
  position: relative;
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: flex-end;
  padding-bottom: 10vh;
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('../images/hero_arch_bg.png');
  background-size: cover;
  background-position: center;
  z-index: 1;
}

.hero__bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.6) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: 0 6vw;
}

.hero__title {
  font-size: clamp(1.7rem, 6.5vw, 4.5rem);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

/* アバウト（Concept） - 非対称・ずらしのレイアウト */
.concept {
  background-color: var(--color-bg);
}

.concept__wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10vw;
}

.concept__left {
  flex: 1;
  position: relative;
}

.concept__left .en-label {
  margin-bottom: 40px;
}

.concept__title {
  font-size: clamp(1.6rem, 5vw, 3rem);
  line-height: 1.5;
  margin-bottom: 60px;
  font-weight: 400;
}

.concept__text {
  font-size: 1rem;
  color: #444;
  max-width: 500px;
}

.concept__right {
  flex: 1;
  /* 画像を少しオフセットして浮かす */
  transform: translateY(-80px);
}

.concept__image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  /* 角丸や影を排除し、シャープな切り抜きに */
}

@media (max-width: 900px) {
  .concept__wrapper {
    flex-direction: column-reverse;
  }
  .concept__right {
    transform: none;
    margin-bottom: 60px;
  }
}

/* サービス - 行単位のリストレイアウト（脱カード） */
.service {
  background-color: var(--color-bg-alt);
}

.service__header {
  margin-bottom: 100px;
}

.service__list {
  border-top: 1px solid var(--color-border);
}

.service__row {
  display: flex;
  align-items: flex-start;
  padding: 60px 0;
  border-bottom: 1px solid var(--color-border);
}

.service__num {
  width: 15%;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-gray);
}

.service__content {
  width: 35%;
  padding-right: 40px;
}

.service__title {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: 0.1em;
}

.service__desc {
  width: 50%;
  font-size: 1rem;
  color: #555;
  line-height: 2;
}

.service__link {
  display: inline-block;
  margin-top: 24px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--color-dark);
  padding-bottom: 4px;
  transition: opacity 0.3s;
}

.service__link:hover {
  opacity: 0.5;
}

@media (max-width: 900px) {
  .service__row {
    flex-direction: column;
    padding: 40px 0;
  }
  .service__num, .service__content, .service__desc {
    width: 100%;
    margin-bottom: 20px;
  }
}

/* コンタクト */
.contact {
  background-color: var(--color-dark);
  color: #fff;
  text-align: center;
  padding: 200px 0;
}

.contact__title {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 8vw, 6rem);
  font-weight: 300;
  margin-bottom: 60px;
}

.btn-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: background-color 0.4s var(--easing), color 0.4s var(--easing);
}

.btn-circle:hover {
  background-color: #fff;
  color: var(--color-dark);
}

/* フッター */
.footer {
  text-align: center;
  padding: 60px 0;
  background-color: var(--color-bg);
}

.footer__copy {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-gray);
}

/* コンサルティングページ独自レイアウト */
.page-header {
  height: 60vh;
  display: flex;
  align-items: flex-end;
  padding: 0 6vw 100px;
  background-color: var(--color-bg-alt);
}

.page-title {
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-content-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 120px 6vw;
}

.consult-hero-img {
  width: 100%;
  height: 60vh;
  object-fit: cover;
  margin-bottom: 120px;
}

.page-content-wrapper h2 {
  font-size: clamp(1.4rem, 5vw, 2.2rem);
  font-weight: 400;
  margin-bottom: 60px;
  line-height: 1.5;
}

.page-content-wrapper h3 {
  font-size: 1.4rem;
  font-weight: 400;
  margin: 80px 0 30px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 20px;
}

.page-content-wrapper p, .page-content-wrapper ul {
  color: #444;
}

.page-content-wrapper .btn-circle {
  border-color: var(--color-dark);
  color: var(--color-dark);
  margin-top: 100px;
}

.page-content-wrapper .btn-circle:hover {
  background-color: var(--color-dark);
  color: #fff;
}

/* 洗練されたフェードインアニメーション */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s var(--easing), transform 1.2s var(--easing);
}

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