/* ==========================================
   common.css — 共通スタイル
   header / footer / nav / btn / section /
   loading / scroll / utilities 等
   ========================================== */


/* ==========================================
   ベース
   ========================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-base);
  background-color: var(--color-bg-base);
  /* テックグリッドオーバーレイ（corporateとの差別化） */
  background-image:
    linear-gradient(rgba(16, 185, 129, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 185, 129, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  overflow-x: hidden;
}

body.is-scroll-locked {
  overflow: hidden;
}

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

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}


/* ==========================================
   コンテナ
   ========================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-xl);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: clamp(1200px, 80vw, 1800px);
    padding-inline: var(--space-2xl);
  }
}


/* ==========================================
   ローディングスクリーン
   ========================================== */
.loading {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background-color: var(--color-bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading__bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent), var(--color-primary));
  width: 0%;
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.8), 0 0 20px rgba(16, 185, 129, 0.4);
  transition: width 0.4s ease;
}

.loading__spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-border-dark);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}


/* ==========================================
   スクロールプログレスバー
   ========================================== */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent), var(--color-primary));
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
  z-index: 1001;
  width: 0%;
  transition: width 0.1s linear;
}


/* ==========================================
   ヘッダー
   ========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(27, 58, 107, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
  transition:
    transform 0.4s ease;
}

.header--scrolled {
  background-color: rgba(27, 58, 107, 0.98);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: opacity var(--transition-base);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo img {
  height: 36px;
  width: auto;
}

.header__logo-text {
  font-size: var(--font-size-lg);
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--color-text-base);
}


/* ==========================================
   ナビゲーション
   ========================================== */
.nav__list {
  display: none;
  flex-direction: column;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-soft);
  padding: var(--space-2xl) var(--space-lg);
  gap: var(--space-xl);
  overflow-y: auto;
}

.nav--open .nav__list {
  display: flex;
}

.nav--open .nav__item {
  animation: navItemIn 0.4s ease both;
}

/* モバイルオーバーレイ展開時は明るい背景なのでテキストを暗色に */
.nav--open .nav__link {
  color: var(--color-text-base);
}

.nav--open .nav__item:nth-child(1) { animation-delay: 0.05s; }
.nav--open .nav__item:nth-child(2) { animation-delay: 0.10s; }
.nav--open .nav__item:nth-child(3) { animation-delay: 0.15s; }
.nav--open .nav__item:nth-child(4) { animation-delay: 0.20s; }
.nav--open .nav__item:nth-child(5) { animation-delay: 0.25s; }

@keyframes navItemIn {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.nav__link {
  display: inline-block;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text-on-dark);
  position: relative;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0%;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
  width: 100%;
}

.nav__link[aria-current="page"] {
  color: var(--color-primary);
}

.nav__link[aria-current="page"]::after {
  width: 100%;
}

.nav__link--cta {
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  box-shadow: 0 0 12px rgba(243, 144, 63, 0.15);
  transition:
    color var(--transition-base),
    background-color var(--transition-base),
    box-shadow var(--transition-base);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover,
.nav__link--cta:focus-visible {
  color: #ffffff;
  background-color: var(--color-primary);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: var(--space-sm);
  color: var(--color-text-on-dark);
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-on-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.nav--open .nav__toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav--open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav--open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .nav__list {
    display: flex;
    flex-direction: row;
    position: static;
    background: none;
    padding: 0;
    gap: var(--space-xl);
    align-items: center;
  }

  .nav__toggle {
    display: none;
  }

  .nav__link {
    font-size: var(--font-size-sm);
  }

  .nav--open .nav__item {
    animation: none;
  }

  /* PC幅ではダーク背景のヘッダー内に表示されるので明るい色を維持 */
  .nav--open .nav__link {
    color: var(--color-text-on-dark);
  }
}


/* ==========================================
   フッター
   ========================================== */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding-block: var(--space-lg) 0;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent-cyan) 0%, var(--color-accent) 30%, var(--color-primary) 60%, transparent 100%);
}

.footer__bottom {
  border-top: 1px solid var(--color-border-dark);
  padding-block: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }

  .footer__legal-links {
    justify-content: flex-start;
  }
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  justify-content: center;
}

.footer__legal-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

.footer__legal-link:hover {
  color: var(--color-primary);
}

.footer__sns {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.footer__sns-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-light);
  border: 1px solid var(--color-border-dark);
  transition:
    color var(--transition-base),
    border-color var(--transition-base),
    background-color var(--transition-base);
}

.footer__sns-link:hover,
.footer__sns-link:focus-visible {
  border-color: var(--color-primary);
  background-color: rgba(243, 144, 63, 0.1);
}

.footer__sns-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
}


/* ==========================================
   ボタン
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: var(--line-height-tight);
  min-height: 44px;
  position: relative;
  overflow: hidden;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    border-color var(--transition-base);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn--primary {
  padding: 14px 32px;
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(243, 144, 63, 0.3);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-primary-dark);
  box-shadow:
    0 0 30px rgba(243, 144, 63, 0.6),
    0 0 60px rgba(243, 144, 63, 0.25),
    0 0 90px rgba(16, 185, 129, 0.1);
  transform: translateY(-3px);
}

.btn--ghost {
  padding: 12px 30px;
  background-color: var(--color-bg-dark-2);
  color: var(--color-text-on-dark);
  border: 2px solid var(--color-border-dark);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.btn--outline {
  padding: 12px 30px;
  background-color: transparent;
  color: var(--color-text-on-dark);
  border: 2px solid rgba(240, 240, 240, 0.4);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--text {
  padding: var(--space-sm) 0;
  background-color: transparent;
  color: var(--color-primary);
  min-height: auto;
}

.btn--text:hover,
.btn--text:focus-visible {
  transform: translateX(4px);
  color: var(--color-primary-dark);
}

.btn--sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn--lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-lg);
  min-height: 56px;
}


/* ==========================================
   セクション共通
   ========================================== */
.section {
  padding-block: var(--space-3xl);
}

.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.section--dark-2 {
  background-color: var(--color-bg-dark-2);
  color: var(--color-text-on-dark);
}

.section--soft {
  background-color: var(--color-bg-soft);
}

.section__header {
  margin-bottom: var(--space-2xl);
}

.section__header--center {
  text-align: center;
}

.section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-text-base);
}

.section--dark .section__title,
.section--dark-2 .section__title {
  background: linear-gradient(135deg, var(--color-accent-cyan) 0%, #ffffff 50%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__title--dark {
  color: var(--color-text-on-dark);
}

@media (min-width: 1024px) {
  .section__title {
    font-size: clamp(48px, 3vw, 64px);
  }
}

.section__subtitle {
  font-size: clamp(var(--font-size-lg), 1.2vw, 22px);
  color: var(--color-text-muted);
  max-width: clamp(600px, 40vw, 800px);
  line-height: var(--line-height-base);
}

.section__header--center .section__subtitle {
  margin-inline: auto;
}

.section--dark .section__subtitle,
.section--dark-2 .section__subtitle {
  color: rgba(200, 210, 240, 0.85);
}

.section__divider {
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-cyan) 0%, var(--color-accent) 40%, var(--color-primary) 80%, transparent 100%);
  margin-bottom: var(--space-2xl);
  width: 120px;
}

.section__header--center .section__divider {
  margin-inline: auto;
}


/* ==========================================
   ページヒーロー（内部ページ共通）
   ========================================== */
.page-hero {
  padding-top: calc(var(--header-height) + var(--space-3xl));
  padding-bottom: var(--space-2xl);
  background-color: transparent;
  color: var(--color-text-on-dark);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(243, 144, 63, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__inner {
  position: relative;
  z-index: 1;
}

.page-hero__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  text-shadow: 0 0 40px rgba(243, 144, 63, 0.3);
}

.page-hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  line-height: var(--line-height-base);
}

@media (min-width: 1024px) {
  .page-hero__title {
    font-size: var(--font-size-3xl);
  }
}


/* ==========================================
   パンくずリスト
   ========================================== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: var(--color-border-dark);
  margin-right: var(--space-xs);
}

.breadcrumb__link {
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--color-primary);
}

.breadcrumb__current {
  color: var(--color-primary);
}


/* ==========================================
   スクロールアニメーション（JSと連携）
   ========================================== */
.js-loaded [data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.js-loaded [data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-loaded [data-animate="from-left"] {
  opacity: 0;
  transform: translateX(-48px);
}

.js-loaded [data-animate="from-left"].is-visible {
  opacity: 1;
  transform: translateX(0);
}

.js-loaded [data-animate="from-right"] {
  opacity: 0;
  transform: translateX(48px);
}

.js-loaded [data-animate="from-right"].is-visible {
  opacity: 1;
  transform: translateX(0);
}

.js-loaded [data-animate="scale"] {
  opacity: 0;
  transform: scale(0.9);
}

.js-loaded [data-animate="scale"].is-visible {
  opacity: 1;
  transform: scale(1);
}


/* ==========================================
   タイピングカーソル
   ========================================== */
.js-typing__cursor {
  color: var(--color-primary);
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  0%,
  100% { opacity: 1; }
  50% { opacity: 0; }
}


/* ==========================================
   ページトップボタン
   ========================================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 100;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.3s ease,
    visibility 0.3s ease,
    transform 0.3s ease;
  box-shadow:
    0 4px 20px var(--color-primary-glow),
    0 0 0 1px rgba(243, 144, 63, 0.2);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(243, 144, 63, 0.5);
}

.back-to-top__icon {
  width: 20px;
  height: 20px;
  border-top: 2px solid #ffffff;
  border-right: 2px solid #ffffff;
  transform: rotate(-45deg) translateY(2px);
}


/* ==========================================
   Glassmorphism ユーティリティ
   ========================================== */
.glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}


/* ==========================================
   グラデーションテキスト ユーティリティ
   ========================================== */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text--gradient {
  background: linear-gradient(90deg, #ffffff 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}


/* ==========================================
   フォーカスリング（アクセシビリティ）
   ========================================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}


/* ==========================================
   ユーティリティ
   ========================================== */
.u-hide-sp {
  display: none;
}

@media (min-width: 768px) {
  .u-hide-sp {
    display: revert;
  }
}

@media (min-width: 768px) {
  .u-hide-pc {
    display: none;
  }
}

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

.u-text-center {
  text-align: center;
}


/* ==========================================
   prefers-reduced-motion 対応
   ========================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js-loaded [data-animate] {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}