:root {
  --ink: #2a2033;
  --plum: #5d2c6a;
  --berry: #8c3d77;
  --pink: #d24f97;
  --lilac: #e8dcf1;
  --leaf: #3b7651;
  --leaf-bright: #7ec46a;
  --paper: #fffdf8;
  --ground: #f7f0e6;
  --card: #ffffff;
  --muted: #6d6175;
  --line: #ebe2d7;
  --font-body: "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* 固定ヘッダーに隠れないよう、アンカー着地位置を下げる（JS無効時の保険）。 */
  scroll-padding-top: 80px;
}

body {
  background-color: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.8;
  margin: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--plum);
  outline-offset: 2px;
}

/* 再利用するロゴマークのスプライト。 */
.svg-sprite {
  height: 0;
  position: absolute;
  width: 0;
}

.skip-link {
  background-color: var(--plum);
  color: #fff;
  left: 1rem;
  padding: 0.6rem 1rem;
  position: fixed;
  text-decoration: none;
  top: -100px;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

/* スキップ先とアンカー移動先をフォーカス時に明確に示す。 */
#main-content:focus,
.anchor-target:focus {
  outline: 3px solid var(--plum);
  outline-offset: 4px;
}

/* 暗い背景のセクションでは枠を明色にして視認性を確保する。 */
.contact-section.anchor-target:focus {
  outline-color: var(--paper);
}

/* すべての見出し・ロゴタイプはゴシック体。 */
h1,
h2,
h3 {
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0;
}

/* 一部の語だけブランドカラーのグラデーションで見せる。 */
.grad {
  background: linear-gradient(100deg, var(--plum), var(--berry) 45%, var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 文節単位で改行させ、語の途中や不自然な位置での折り返しを防ぐ。 */
.phrase {
  white-space: nowrap;
}

.eyebrow {
  color: var(--leaf);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin: 0 0 0.7rem;
  text-transform: uppercase;
}

/* ---------- ヘッダー ---------- */
.site-header {
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-navigation {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 1.05rem;
  font-weight: 700;
  gap: 0.55rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  display: inline-block;
  height: 2rem;
  width: 2rem;
}

.navigation-links {
  align-items: center;
  display: flex;
  font-size: 0.9rem;
  gap: 1.4rem;
}

.navigation-links a {
  padding: 0.2rem 0;
  position: relative;
  text-decoration: none;
}

.navigation-links a::after {
  background: linear-gradient(90deg, var(--berry), var(--pink));
  border-radius: 2px;
  bottom: -2px;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left;
  width: 100%;
}

.navigation-links a:hover::after,
.navigation-links a:focus-visible::after {
  transform: scaleX(1);
}

.navigation-links a.contact-link {
  border: 1.5px solid color-mix(in srgb, var(--plum) 55%, transparent);
  border-radius: 999px;
  color: var(--plum);
  font-weight: 600;
  padding: 0.4rem 1rem;
}

.contact-link::after {
  display: none;
}

.contact-link:hover,
.contact-link:focus-visible {
  background: linear-gradient(120deg, var(--berry), var(--pink));
  border-color: transparent;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--pink) 40%, transparent);
  color: #fff;
  transform: translateY(-1px);
}

.nav-toggle {
  align-items: center;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  cursor: pointer;
  display: none;
  height: 46px;
  justify-content: center;
  padding: 0;
  width: 46px;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  background-color: currentColor;
  display: block;
  height: 2px;
  width: 20px;
}

.nav-toggle-bars {
  position: relative;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  left: 0;
  position: absolute;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.nav-toggle-label {
  display: none;
}

/* ---------- ヒーロー ---------- */
.hero-section {
  align-items: center;
  background:
    radial-gradient(120% 90% at 80% -10%, color-mix(in srgb, var(--lilac) 75%, transparent), transparent 60%),
    linear-gradient(180deg, color-mix(in srgb, var(--lilac) 55%, var(--paper)), var(--paper));
  display: flex;
  min-height: 88vh;
  overflow: hidden;
  padding: 3.5rem 0;
  position: relative;
}

.hero-fx {
  display: block;
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
  z-index: 0;
}

.hero-content {
  max-width: 860px;
  position: relative;
  z-index: 1;
}

.badge {
  background: color-mix(in srgb, var(--leaf-bright) 22%, var(--card));
  border: 1px solid color-mix(in srgb, var(--leaf) 35%, transparent);
  border-radius: 999px;
  color: var(--leaf);
  display: block;
  letter-spacing: 0.14em;
  margin: 0 0 1.2rem;
  padding: 0.45rem 0.9rem;
  width: fit-content;
}

h1 {
  /* 最小値は最長文節「小さなわくわくを。」が 320px 幅でも収まるサイズ。 */
  font-size: clamp(2rem, 7vw, 5.4rem);
  line-height: 1.14;
  margin-bottom: 1.6rem;
}

h2 {
  font-size: clamp(1.8rem, 4.4vw, 3rem);
  margin-bottom: 1.4rem;
}

h3 {
  font-size: 1.3rem;
}

.hero-copy {
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  margin: 0 0 2rem;
  max-width: 36ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-hint {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 1.3rem 0 0;
}

/* ---------- ボタン ---------- */
.button {
  align-items: center;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 700;
  justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1.6rem;
  text-decoration: none;
}

.button-primary {
  background: linear-gradient(120deg, var(--plum), var(--berry));
  box-shadow: 0 8px 20px color-mix(in srgb, var(--plum) 40%, transparent);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 14px 30px color-mix(in srgb, var(--berry) 45%, transparent);
  color: #fff;
}

.button-secondary {
  background: transparent;
  border: 1.5px solid color-mix(in srgb, var(--plum) 45%, transparent);
  color: var(--plum);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: color-mix(in srgb, var(--plum) 8%, transparent);
  color: var(--plum);
}

/* ---------- 共通セクション ---------- */
.content-section {
  padding: clamp(3.5rem, 8vw, 6.5rem) 0;
  position: relative;
}

.split-layout {
  align-items: start;
  display: grid;
  gap: 2.5rem;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
}

.body-copy {
  color: var(--muted);
  font-size: 1.05rem;
}

.body-copy p {
  margin: 0 0 1rem;
}

/* ---------- 私たちについて ---------- */
.about-section {
  background: var(--paper);
  overflow: hidden;
}

.about-section > .container {
  position: relative;
  z-index: 1;
}

.about-section::before,
.about-section::after {
  border-radius: 50%;
  content: "";
  filter: blur(34px);
  pointer-events: none;
  position: absolute;
  z-index: 0;
}

.about-section::before {
  background: color-mix(in srgb, var(--lilac) 80%, transparent);
  height: 220px;
  left: -60px;
  top: 12%;
  width: 220px;
}

.about-section::after {
  background: color-mix(in srgb, var(--leaf-bright) 32%, transparent);
  bottom: 8%;
  height: 180px;
  right: -40px;
  width: 180px;
}

/* ---------- 取り組み ---------- */
.services-section {
  background: var(--ground);
}

.service-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 0.5rem;
}

.service-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 4px 16px color-mix(in srgb, var(--plum) 7%, transparent);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 1.8rem;
  position: relative;
}

.service-item::before {
  background: radial-gradient(80% 60% at 100% 0%, color-mix(in srgb, var(--pink) 16%, transparent), transparent 70%);
  content: "";
  inset: 0;
  opacity: 0;
  position: absolute;
}

.service-item > * {
  position: relative;
}

.service-icon {
  height: 40px;
  width: 40px;
}

.service-number {
  color: var(--berry);
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 0.7rem;
}

.service-item h3 {
  margin: 0.5rem 0;
}

.service-item p {
  color: var(--muted);
  font-size: 0.93rem;
  margin: 0 0 1.1rem;
}

.service-status {
  align-self: flex-start;
  background: color-mix(in srgb, var(--leaf-bright) 22%, transparent);
  border-radius: 999px;
  color: var(--leaf);
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: auto;
  padding: 0.25rem 0.7rem;
}

/* ---------- 会社概要 ---------- */
.company-section {
  background: var(--paper);
}

.company-details {
  margin: 0;
}

.company-details > div {
  border-radius: 8px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  grid-template-columns: 8rem 1fr;
  padding: 1rem 0;
}

.company-details > div:hover {
  background-color: color-mix(in srgb, var(--lilac) 45%, transparent);
  padding-left: 0.6rem;
}

.company-details dt {
  color: var(--berry);
  font-weight: 700;
  margin: 0;
}

.company-details dd {
  margin: 0;
}

/* ---------- お問い合わせ ---------- */
.contact-section {
  background: linear-gradient(160deg, var(--plum), #43214d);
  color: #fff;
}

.contact-section .eyebrow {
  color: color-mix(in srgb, var(--leaf-bright) 80%, #fff);
}

.contact-section h2 {
  /* 短い一文なので途中で割れないよう常に1行に収める。 */
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  white-space: nowrap;
}

.contact-section > .container > div > p {
  color: color-mix(in srgb, #fff 80%, transparent);
}

.contact-layout {
  align-items: start;
  display: grid;
  gap: 2.5rem;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
}

.contact-form {
  background: var(--card);
  border-radius: 20px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
  color: var(--ink);
  padding: 1.8rem;
}

.form-field {
  margin-bottom: 1.1rem;
}

.honeypot {
  height: 1px;
  left: -10000px;
  overflow: hidden;
  position: absolute;
  width: 1px;
}

.form-field label,
.consent-field label {
  font-weight: 700;
}

.form-field label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.form-field input,
.form-field textarea {
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--plum) 25%, var(--line));
  border-radius: 12px;
  color: var(--ink);
  display: block;
  font: inherit;
  padding: 0.7rem 0.8rem;
  width: 100%;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--berry);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--berry) 25%, transparent);
  outline: none;
}

.consent-field {
  align-items: center;
  display: flex;
  font-size: 0.9rem;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.consent-field input {
  flex: none;
  height: 1.25rem;
  width: 1.25rem;
}

.form-notice {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 1rem;
}

.submit-button {
  margin-top: 0.25rem;
  width: 100%;
}

/* ---------- プライバシーポリシー ---------- */
.privacy-section {
  background: var(--ground);
}

.policy-content {
  max-width: 72ch;
}

.policy-content p {
  color: var(--muted);
}

.policy-date {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- フッター ---------- */
.site-footer {
  background: #1d1526;
  color: #efe8f2;
  font-size: 0.9rem;
  padding: 2.5rem 0;
}

.footer-content {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  font-weight: 700;
  gap: 0.2rem;
}

.footer-links {
  display: flex;
  gap: 1.3rem;
}

.footer-links a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--leaf-bright);
}

.site-footer a:focus-visible {
  outline-color: var(--paper);
}

@media (max-width: 767px) {
  .site-navigation {
    flex-wrap: wrap;
    padding-bottom: 0.4rem;
    padding-top: 0.4rem;
    row-gap: 0.5rem;
  }

  .site-navigation.nav-enhanced .nav-toggle {
    display: inline-flex;
  }

  .navigation-links {
    align-items: flex-start;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0.2rem;
    padding-bottom: 0.6rem;
  }

  .navigation-links a {
    padding: 0.5rem 0;
    width: 100%;
  }

  .navigation-links a::after {
    display: none;
  }

  /* desktop 側の .navigation-links a.contact-link と詳細度を揃え、確実に上書きする。 */
  .navigation-links a.contact-link {
    border: 0;
    padding: 0.5rem 0;
  }

  .site-navigation.nav-enhanced .navigation-links {
    display: none;
  }

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

  .hero-section {
    min-height: auto;
    padding: 4.5rem 0;
  }

  .content-section {
    padding: 3.5rem 0;
  }

  .split-layout,
  .contact-layout {
    gap: 1.2rem;
    grid-template-columns: 1fr;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .company-details > div {
    gap: 0.2rem;
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 1.3rem;
  }

  .footer-content {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* ---------- 動き・アニメーション ---------- */
.button,
.contact-link,
.brand-mark,
.footer-links a,
.service-status {
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.navigation-links a::after {
  transition: transform 0.25s ease;
}

.service-item {
  transition: transform 0.3s cubic-bezier(0.34, 1.4, 0.5, 1), box-shadow 0.45s ease;
}

.service-item::before {
  transition: opacity 0.4s ease;
}

.company-details > div {
  transition: background-color 0.5s ease, padding-left 0.35s ease;
}

.form-field input,
.form-field textarea {
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* 動きを抑制する設定の利用者には、装飾的な動きを与えない。 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .service-item,
  .service-item::before,
  .company-details > div,
  .brand-mark,
  .navigation-links a::after,
  .footer-links a {
    transition: none !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .button:hover {
    transform: translateY(-2px);
  }

  .button-primary:hover {
    transform: translateY(-3px) scale(1.02);
  }

  .brand:hover .brand-mark {
    transform: rotate(-8deg) scale(1.08);
  }

  .service-item:hover {
    box-shadow: 0 28px 50px color-mix(in srgb, var(--plum) 26%, transparent);
    transform: translateY(-8px);
  }

  .service-item:hover::before {
    opacity: 1;
  }

  .service-icon {
    animation: breathe 3.6s ease-in-out infinite;
    transform-origin: center;
  }

  .about-section::before {
    animation: float 12s ease-in-out infinite;
  }

  .about-section::after {
    animation: float 12s ease-in-out infinite;
    animation-delay: -4s;
  }

  /* ファーストビューは読み込み時に段階的に立ち上げる。 */
  .hero-content > * {
    animation: rise-in 0.8s ease both;
  }

  .hero-content > *:nth-child(2) {
    animation-delay: 0.08s;
  }

  .hero-content > *:nth-child(3) {
    animation-delay: 0.16s;
  }

  .hero-content > *:nth-child(4) {
    animation-delay: 0.24s;
  }

  .hero-content > *:nth-child(5) {
    animation-delay: 0.32s;
  }

  /*
   * スクロールで視界に入った要素をフェードインさせる。
   * JavaScript 有効時（html.js）のみ初期状態を隠し、無効時は常時表示にする。
   */
  .js [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes breathe {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.07);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0);
  }

  50% {
    transform: translate(12px, -24px);
  }
}