/* ===========================
   ベース変数 / Base variables
   =========================== */
:root {
  --color-pink: #d4a5a5;
  --color-pink-deep: #b87f7f;
  --color-pink-light: #ead6d6;
  --color-bg: #faf8f6;
  --color-bg-alt: #f3eeea;
  --color-text: #2b2422;
  --color-text-soft: #6b5e5b;
  --color-border: #e6dedb;
  --color-white: #ffffff;

  --font-jp: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-en: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-base: var(--font-jp), var(--font-en);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(43, 36, 34, 0.05);
  --shadow-md: 0 8px 24px rgba(43, 36, 34, 0.08);

  --container: 1120px;
  --gap: 24px;
}

/* ===========================
   リセット & ベース / Reset & Base
   =========================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-jp), var(--font-en);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.lang-en {
  font-family: var(--font-en), var(--font-jp);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-pink-deep);
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ===========================
   ボタン / Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-pink);
  color: var(--color-white);
  border-color: var(--color-pink);
}

.btn-primary:hover {
  background-color: var(--color-pink-deep);
  border-color: var(--color-pink-deep);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-text);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* ===========================
   ヘッダー / Header
   =========================== */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(250, 248, 246, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.site-header.is-scrolled {
  background-color: rgba(250, 248, 246, 0.95);
  border-bottom-color: var(--color-border);
  box-shadow: 0 2px 12px rgba(43, 36, 34, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-en);
  font-size: 1.05rem;
}

.nav ul {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background-color: var(--color-pink);
  transition: width 0.25s ease;
}

.nav a:hover::after {
  width: 100%;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background-color: transparent;
  border: 1.5px solid var(--color-pink);
  color: var(--color-pink-deep);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-en);
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}

.lang-toggle:hover {
  background-color: var(--color-pink);
  color: var(--color-white);
}

.lang-toggle .lang-jp,
.lang-toggle .lang-en {
  opacity: 0.45;
  transition: opacity 0.2s ease;
}

body:not(.lang-en) .lang-toggle .lang-jp,
body.lang-en .lang-toggle .lang-en {
  opacity: 1;
}

.lang-divider {
  opacity: 0.45;
}

/* ===========================
   ハンバーガーメニュー / Hamburger menu
   =========================== */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  position: relative;
  z-index: 110;
}

.menu-bar {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.35s ease, opacity 0.25s ease, top 0.35s ease, background-color 0.25s ease;
}

.menu-bar:nth-child(1) {
  top: 13px;
}

.menu-bar:nth-child(2) {
  top: 19px;
}

.menu-bar:nth-child(3) {
  top: 25px;
}

.menu-toggle.is-open .menu-bar:nth-child(1) {
  top: 19px;
  transform: rotate(45deg);
  background-color: var(--color-pink-deep);
}

.menu-toggle.is-open .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open .menu-bar:nth-child(3) {
  top: 19px;
  transform: rotate(-45deg);
  background-color: var(--color-pink-deep);
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(43, 36, 34, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 90;
}

.menu-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ===========================
   スクロール出現アニメーション / Scroll reveal
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  will-change: opacity, transform;
}

.reveal--left {
  transform: translateX(-40px);
}

.reveal--right {
  transform: translateX(40px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* ヒーロー入場アニメーション / Hero entrance
   表示順: 背景カード → うさぎ → テキスト群
   Order: card → rabbit → text group */
.hero-anim {
  opacity: 0;
  transform: translateY(20px);
  animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: var(--delay, 0s);
}

/* 背景カード：スケールしながらふわっと出現 / Card: scale-in fade */
.hero-anim--card {
  transform: scale(0.94);
  animation-name: heroInCard;
  animation-duration: 1.1s;
}

/* うさぎ：下から飛び込んでくる / Rabbit: rise from bottom */
.hero-anim--rabbit {
  transform: translateY(60px) scale(0.92);
  transform-origin: bottom right;
  animation-name: heroInRabbit;
  animation-duration: 1.05s;
}

@keyframes heroIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroInCard {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes heroInRabbit {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Workカードのスタッガー / Work cards stagger */
.work-card {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease, box-shadow 0.3s ease;
}

.work-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* リダクションモーション対応 / Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .hero-anim,
  .work-card,
  .hero-visual img {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ===========================
   ヒーロー / Hero
   =========================== */
.hero {
  /* ヘッダー(72px)を除いたビューポートの中央にヒーローを配置
     Center the hero in the viewport minus header height */
  min-height: calc(100svh - 72px);
  padding: 40px 0;
  display: flex;
  align-items: center;
  background-color: var(--color-bg);
}

/* ステージ：カード＋うさぎ＋テキストの重ね合わせ親
   Stage: positioning context for card + rabbit + text overlay */
.hero-stage {
  position: relative;
  width: min(82%, 1180px);
  margin: 0 auto;
  aspect-ratio: 16 / 8;
  /* うさぎが上にはみ出す分の余白を確保 / Reserve room for rabbit ears overflow */
  padding-top: clamp(40px, 8vw, 110px);
}

/* 背景カード（key_visual.jpg） / Background card */
.hero-card {
  position: absolute;
  inset: clamp(40px, 8vw, 110px) 0 0 0;
  border-radius: clamp(20px, 2.6vw, 32px);
  background-image: url("key_visual.jpg");
  background-size: cover;
  background-position: center;
  box-shadow: 0 24px 60px -20px rgba(184, 127, 127, 0.35);
  overflow: hidden;
}

/* うさぎ：右側、耳が背景からはみ出るように
   Rabbit wrapper: handles entrance animation
   Rabbit img: handles floaty (separated to avoid animation collision) */
.hero-rabbit {
  position: absolute;
  right: clamp(2%, 5%, 8%);
  bottom: 0;
  width: clamp(312px, 50%, 672px);
  z-index: 2;
  pointer-events: none;
  transform-origin: bottom right;
}

.hero-rabbit-img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 12px 24px rgba(43, 36, 34, 0.12));
  animation: floaty 6s ease-in-out infinite;
  animation-delay: 1.6s;
}

/* テキスト群：カード内左側に重ねる / Text overlay on the left of card */
.hero-text {
  position: absolute;
  left: clamp(28px, 6%, 80px);
  top: 50%;
  transform: translateY(-50%);
  max-width: 46%;
  z-index: 3;
}

.hero-title {
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin: 0 0 24px;
  color: var(--color-text);
}

.hero-sub {
  font-size: clamp(0.92rem, 1.15vw, 1.05rem);
  color: var(--color-text-soft);
  max-width: 440px;
  margin: 0 0 36px;
  line-height: 1.8;
}

/* ヒーロー専用ボタン：半透明の柔らかい質感 / Soft translucent CTA */
.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  background-color: rgba(255, 255, 255, 0.7);
  color: var(--color-text);
  border: 1.5px solid rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 6px 20px rgba(184, 127, 127, 0.18);
  transition: all 0.25s ease;
}

.btn-hero:hover {
  background-color: var(--color-pink);
  color: var(--color-white);
  border-color: var(--color-pink);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(184, 127, 127, 0.3);
}

/* ===========================
   セクション共通 / Sections
   =========================== */
.eyebrow {
  text-align: center;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--color-pink-deep);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  margin: 0 0 56px;
  letter-spacing: 0.02em;
}

/* ===========================
   制作実績 / Works
   =========================== */
.works {
  padding: 100px 0;
  background-color: var(--color-bg-alt);
}

.works-note {
  text-align: center;
  margin: -40px auto 48px;
  color: var(--color-text-soft);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.work-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.work-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.work-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-pink-light) 0%, var(--color-pink) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  overflow: hidden;
}

.work-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.work-card:hover .work-thumb img {
  transform: scale(1.04);
}

/* Concept Work バッジ / Concept Work badge */
.work-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background-color: rgba(255, 255, 255, 0.92);
  color: var(--color-pink-deep);
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 2px 6px rgba(43, 36, 34, 0.08);
  z-index: 1;
}

/* 言語タグ / Language tag */
.work-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  min-height: 22px;
}

.work-lang {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background-color: var(--color-bg-alt);
  color: var(--color-text-soft);
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

.work-body {
  padding: 24px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.work-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px;
}

.work-desc {
  font-size: 0.92rem;
  color: var(--color-text-soft);
  margin: 0 0 16px;
  flex: 1;
}

.work-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-pink-deep);
  align-self: flex-start;
}

.work-link:hover {
  gap: 10px;
}

/* ===========================
   About
   =========================== */
.about {
  padding: 100px 0;
}

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

.about-visual {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background-color: var(--color-pink-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.about-visual img {
  width: 70%;
  height: auto;
  object-fit: contain;
}

.about-text .eyebrow {
  text-align: left;
}

.about-text .section-title {
  text-align: left;
  margin-bottom: 24px;
}

.about-text p {
  color: var(--color-text-soft);
  margin: 0 0 28px;
  max-width: 480px;
}

/* ===========================
   お問い合わせ / Contact
   =========================== */
.contact {
  padding: 100px 0;
  background-color: var(--color-bg-alt);
}

.contact-lead {
  text-align: center;
  color: var(--color-text-soft);
  max-width: 520px;
  margin: -32px auto 56px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: block;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-pink);
  box-shadow: 0 0 0 3px rgba(212, 165, 165, 0.2);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: #b6a8a4;
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

.contact-form .btn {
  justify-self: start;
  margin-top: 8px;
}

.form-result {
  margin: 8px 0 0;
  font-size: 0.9rem;
  min-height: 1.4em;
}

.form-result.success {
  color: #2f7a4a;
}

.form-result.error {
  color: #b94a4a;
}

.contact-info {
  display: grid;
  gap: 20px;
  padding: 28px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.95rem;
}

.contact-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-pink-light);
  color: var(--color-pink-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* ===========================
   フッター / Footer
   =========================== */
.site-footer {
  padding: 28px 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-soft);
  font-size: 0.85rem;
}

/* ===========================
   レスポンシブ / Responsive
   =========================== */
@media (max-width: 880px) {
  .hero {
    padding: 56px 0 72px;
  }

  .hero-stage {
    width: 92%;
    aspect-ratio: 5 / 4;
    padding-top: clamp(50px, 11vw, 90px);
  }

  .hero-text {
    max-width: 52%;
    left: clamp(20px, 5%, 36px);
  }

  .hero-rabbit {
    width: clamp(216px, 58%, 384px);
    right: clamp(-10px, -2%, 0px);
  }

  .hero-sub {
    margin-bottom: 24px;
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .works,
  .about,
  .contact {
    padding: 72px 0;
  }

  .works-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .about-text .eyebrow,
  .about-text .section-title {
    text-align: center;
  }

  .about-text p {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .about-text .btn {
    display: flex;
    margin-left: auto;
    margin-right: auto;
  }

  .section-title {
    margin-bottom: 40px;
  }
}

/* タブレット以下：ハンバーガーメニューに切替 / Tablet & below: switch to hamburger */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(78%, 320px);
    height: 100dvh;
    background-color: var(--color-bg);
    box-shadow: -8px 0 24px rgba(43, 36, 34, 0.08);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 100;
    padding: 96px 32px 32px;
    overflow-y: auto;
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav ul {
    flex-direction: column;
    gap: 28px;
  }

  .nav a {
    font-size: 1.15rem;
    font-weight: 600;
  }

  /* メニュー展開中はスクロールロック / Lock body scroll when menu open */
  body.menu-open {
    overflow: hidden;
  }
}

@media (max-width: 600px) {
  .header-inner {
    height: 64px;
    gap: 12px;
  }

  .lang-toggle {
    padding: 6px 10px;
    font-size: 0.78rem;
  }

  .logo-text {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 18px;
  }

  /* 極小画面：縦積み — テキスト上、うさぎは下に小さめで配置
     Very small screens: stack — text on top, smaller rabbit at bottom */
  .hero-stage {
    aspect-ratio: 4 / 5;
    padding-top: 64px;
  }

  .hero-text {
    position: absolute;
    left: 22px;
    right: 22px;
    top: 90px;
    bottom: auto;
    transform: none;
    max-width: none;
    text-align: center;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-rabbit {
    width: 72%;
    right: 50%;
    transform: translateX(50%);
    transform-origin: bottom center;
  }

  .hero-anim--rabbit {
    transform: translateX(50%) translateY(50px) scale(0.92);
  }

  @keyframes heroInRabbit {
    to {
      opacity: 1;
      transform: translateX(50%) translateY(0) scale(1);
    }
  }
}