/* ============================================
   common.css — 共通レイアウト / ヘッダー / フッター / コンポーネント
   ============================================ */

/* ---- Container ---- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header.is-scrolled {
  background-color: rgba(250, 248, 245, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-md);
  max-width: none;
  padding-inline: clamp(24px, 3vw, 48px);
}

.header__logo {
  flex-shrink: 0;
  z-index: 101;
}

.header__logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-dark);
  /* TODO: ロゴ画像に差し替えたら削除 */
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-list a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-dark);
  letter-spacing: 0.03em;
  transition: color var(--transition-base);
}

.header__nav-list a:hover {
  color: var(--color-accent-dark);
}

.header__nav-cta {
  padding: 8px 22px;
  border: 1.5px solid var(--color-dark);
  border-radius: 6px;
  transition:
    background-color var(--transition-base),
    color var(--transition-base) !important;
}

.header__nav-cta:hover {
  background-color: var(--color-dark) !important;
  color: var(--color-surface) !important;
}

/* Hamburger */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 36px;
  height: 36px;
  padding: 4px;
  z-index: 101;
}

.header__hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__hamburger.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   ドロワーヘッダー（全ページ共通）
   ============================================ */

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

.header__nav {
  transition: opacity 0.3s ease, visibility 0s linear 0s;
  margin-right: clamp(28px, 3.5vw, 52px);
}

.header__nav-list a {
  font-weight: 400;
  letter-spacing: 0.1em;
  font-size: 0.82rem;
}

.header.is-scrolled .header__nav {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}

.header__cta-btn {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 22px;
  background-color: var(--color-green-dark);
  color: var(--color-surface);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color var(--transition-base);
}

.header__cta-btn:hover {
  background-color: var(--color-green-deep);
}

.header__menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 18px;
  border: 1px solid rgba(26, 26, 26, 0.3);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  color: var(--color-dark);
  flex-shrink: 0;
  transition: border-color var(--transition-base);
}

.header__menu-btn:hover {
  border-color: rgba(26, 26, 26, 0.6);
}

.header__menu-btn__icon {
  position: relative;
  width: 16px;
  height: 9px;
  flex-shrink: 0;
}

.header__menu-btn__icon::before,
.header__menu-btn__icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
}

.header__menu-btn__icon::before { top: 0; }
.header__menu-btn__icon::after  { bottom: 0; }

.header__menu-btn__label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1;
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0s linear 0.4s;
  z-index: 200;
  cursor: pointer;
}

.drawer-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.4s ease, visibility 0s linear 0s;
}

.header__drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(400px, 85vw);
  height: 100vh;
  background: var(--color-surface);
  padding: calc(var(--header-height) + var(--space-lg)) clamp(var(--space-lg), 5vw, var(--space-xl)) var(--space-xl);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 210;
  overflow-y: auto;
  border-left: 1px solid rgba(232, 226, 217, 0.5);
}

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

.drawer__nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.drawer__link {
  display: block;
  padding: clamp(10px, 1.5vw, 16px) 0;
  font-size: clamp(0.875rem, 1.4vw, 1.05rem);
  font-weight: 400;
  color: var(--color-dark);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 226, 217, 0.28);
  letter-spacing: 0.08em;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.drawer__link:first-child {
  border-top: 1px solid rgba(232, 226, 217, 0.28);
}

.drawer__link:hover {
  color: var(--color-green-dark);
  padding-left: 8px;
}

body.is-drawer-open {
  overflow: hidden;
}

.drawer__brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  text-decoration: none;
  color: var(--color-dark);
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.drawer__brand-link:hover {
  opacity: 1;
}

.drawer__brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.drawer__brand-name {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-dark);
}

/* ---- Section base ---- */
.section {
  padding-block: var(--section-padding);
}

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

/* ---- Section Heading ---- */
.section-heading {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-heading--left {
  text-align: left;
}

.section-heading__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.section-heading__title {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-3xl));
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: var(--leading-tight);
  display: inline-block;
  padding-bottom: var(--space-sm);
  position: relative;
}

.section-heading__title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transition: width 0.6s ease 0.3s;
}

.section-heading--left .section-heading__title::after {
  left: 0;
  transform: none;
}

/* is-visible は .js-reveal 要素に付与される（scroll-reveal.js 参照） */
.is-visible .section-heading__title::after {
  width: 48px;
}

.section-heading__sub {
  display: block;
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---- Section CTA ---- */
.section-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* ---- Button ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: 8px;
  letter-spacing: 0.02em;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-base);
  cursor: pointer;
  border: 1.5px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-dark);
  color: var(--color-surface);
  border-color: var(--color-dark);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

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

.btn--outline:hover {
  background-color: var(--color-dark);
  color: var(--color-surface);
}

.btn--green {
  background-color: var(--color-green);
  color: var(--color-surface);
  border-color: var(--color-green);
}

.btn--green:hover {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

.btn--sm {
  padding: 10px 22px;
  font-size: var(--text-sm);
}

.btn--lg {
  padding: 18px 40px;
  font-size: var(--text-lg);
}

.btn__arrow {
  display: inline-block;
  transition: transform var(--transition-base);
}

.btn:hover .btn__arrow {
  transform: translateX(5px);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---- Badge ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  background-color: var(--color-border);
  color: var(--color-text-muted);
}

.badge--news {
  background-color: #EEF1F8;
  color: #4A6EA8;
}

/* ---- お知らせカテゴリバッジ ---- */
.badge--notice {          /* お知らせ：ウォームベージュ */
  background-color: #F4EDDF;
  color: var(--color-accent-dark);
}

.badge--service {         /* サービス情報：ゴールド系 */
  background-color: rgba(200, 169, 110, 0.16);
  color: var(--color-accent-dark);
  border: 1px solid rgba(200, 169, 110, 0.28);
}

.badge--achievement {     /* 施工実績：薄いウォームグレー */
  background-color: #EEEBE6;
  color: #5C564E;
}

.badge--important {       /* 重要なお知らせ：ダーク反転 */
  background-color: var(--color-dark);
  color: var(--color-surface);
}

.badge--works {
  background-color: #F4EDDF;
  color: var(--color-accent-dark);
}

/* ---- Card ---- */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xs);
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 6px rgba(44, 44, 44, 0.05);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(44, 44, 44, 0.10);
}

.card__img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-border);
}

.card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.card:hover .card__img img {
  transform: scale(1.04);
}

.card__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-tight);
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-dark);
  transition: color var(--transition-base);
}

.card__link:hover {
  color: var(--color-accent-dark);
}

.card__link svg {
  transition: transform var(--transition-base);
}

.card__link:hover svg {
  transform: translateX(4px);
}

/* ---- Card Grid ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.card-grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* ---- Image Placeholder (画像追加まで使用) ---- */
.img-placeholder {
  width: 100%;
  height: 100%;
  min-height: 220px;
  background:
    linear-gradient(175deg, rgba(255,255,255,0.1) 0%, transparent 40%, rgba(0,0,0,0.04) 100%),
    linear-gradient(145deg, #E2D9CE 0%, #D5CCC0 50%, #CBBFB3 100%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 14px;
  position: relative;
}

.img-placeholder::after {
  content: 'PHOTO';
  font-size: 0.52rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: rgba(91, 155, 112, 0.15);
}

.img-placeholder--tall {
  min-height: 400px;
}

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(135deg, #F5EFE4 0%, #EDE5D6 100%);
  border-radius: var(--radius-xs);
  padding: var(--space-xl) var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.cta-banner__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin-bottom: 8px;
}

.cta-banner__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 460px;
  line-height: var(--leading-normal);
}

/* ---- News List ---- */
.news-list {
  border-top: 1px solid var(--color-border);
}

.news-item {
  border-bottom: 1px solid var(--color-border);
}

.news-item__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xs);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.news-item__link:hover {
  background-color: var(--color-surface);
  transform: translateX(var(--space-sm));
}

.news-item__date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.news-item__title {
  font-size: var(--text-base);
  font-weight: 500;
  line-height: var(--leading-tight);
}

/* ---- Footer ---- */
.footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.75);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(200, 169, 110, 0.3);
}

.footer__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo-mark {
  display: inline-block;
  width: clamp(28px, 2.5vw, 34px);
  height: clamp(28px, 2.5vw, 34px);
  object-fit: contain;
  margin-right: 8px;
  vertical-align: middle;
  flex-shrink: 0;
}

.footer__logo {
  display: inline-block;
  font-size: var(--text-xl);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  vertical-align: middle;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.45);
  line-height: var(--leading-normal);
  max-width: 260px;
}

.footer__nav {
  align-self: flex-start;
}

.footer__nav-list {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  gap: 14px 48px;
}

.footer__nav-list a {
  display: flex;
  flex-direction: column;
  gap: 3px;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-base);
}

.footer__nav-ja {
  font-size: var(--text-sm);
  font-weight: 500;
}

.footer__nav-en {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: rgba(200, 169, 110, 0.55);
  font-weight: 600;
  transition: color var(--transition-base);
}

.footer__nav-list a:hover {
  color: #FFFFFF;
}

.footer__nav-list a:hover .footer__nav-en {
  color: var(--color-accent);
}

.footer__bottom {
  padding-block: var(--space-md);
}

.footer__copy {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.3);
  text-align: left;
  letter-spacing: 0.08em;
}

/* フッター下部：ダーク帯 */
.footer__bottom {
  background-color: var(--color-dark);
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__totop-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--transition-base);
}

.footer__totop-wrap:hover {
  color: rgba(255, 255, 255, 0.75);
}

.footer__totop-text {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.footer__totop-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  background-color: var(--color-green-dark);
  color: var(--color-surface);
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.footer__totop-wrap:hover .footer__totop-icon {
  background-color: var(--color-green-deep);
  transform: translateY(-2px);
}

/* フッター下部：著作権＋プライバシーポリシーのグループ */
.footer__legal {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer__privacy-link {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.3);
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color var(--transition-base);
  white-space: nowrap;
}

.footer__privacy-link:hover {
  color: rgba(255, 255, 255, 0.65);
}

.footer__info {
  text-align: left;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  padding-left: var(--space-xl);
}

.footer__info-label {
  font-size: 0.6rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.footer__info-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.footer__info-line {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.75;
  letter-spacing: 0.02em;
}

.footer__info-line a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
  overflow-wrap: break-word;
}

.footer__info-line a:hover {
  color: rgba(255, 255, 255, 0.75);
}

.footer__info-tel {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.04em;
}

/* スクロールアニメーション：下からフェードイン */
.js-reveal.reveal-up {
  transform: translateY(20px);
  transition: opacity 0.85s ease-out, transform 0.85s ease-out;
}

.js-reveal.reveal-up.is-visible {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .js-reveal.reveal-up {
    transform: none;
    transition: none;
  }
}

/* ---- Mobile CTA (固定ボタン) ---- */
.mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 98;
  padding: 10px var(--container-padding) calc(10px + env(safe-area-inset-bottom));
  background-color: rgba(250, 248, 245, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
}

.mobile-cta__btn {
  display: block;
  text-align: center;
  padding: 14px;
  background-color: var(--color-dark);
  color: var(--color-surface);
  border-radius: 6px;
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: background-color var(--transition-base);
}

.mobile-cta__btn:hover {
  background-color: var(--color-accent-dark);
}


/* ============================================
   固定ブランドレール（PC Only）全ページ共通
   ============================================ */

/* デフォルト：モバイルでは非表示 */
.site-brand-rail {
  display: none;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.site-brand-rail:hover {
  opacity: 0.72;
}

/* ---- ロゴマーク ---- */
.brand-rail__logo-mark {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
}

/* ---- 日本語社名（縦書き） ---- */
.brand-rail__name {
  writing-mode: vertical-rl;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.2vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-dark);
  line-height: 1.4;
}

/* ---- 縦ライン ---- */
.brand-rail__line {
  display: block;
  width: 1px;
  height: 40px;
  background: var(--color-border);
  flex-shrink: 0;
}

/* ---- 英字社名（縦書き補助） ---- */
.brand-rail__en {
  writing-mode: vertical-rl;
  font-family: var(--font-en);
  font-size: 0.58rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  opacity: 0.7;
}

/* ---- PC 表示：ブランドレール固定配置 ---- */
@media (min-width: 1025px) {
  /* コンテナ左余白をブランドレール幅以上に確保（1025-1150px で重なりが出るため） */
  .container {
    padding-left: max(var(--container-padding), var(--brand-rail-width));
  }

  .site-brand-rail {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--brand-rail-width);
    z-index: 60;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: clamp(20px, 2.5vw, 36px);
    padding-bottom: 24px;
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    user-select: none;
  }

  .brand-rail__main {
    margin-top: auto;
    margin-bottom: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
}