/* ============================================================
 * sections.css — 各セクション固有のスタイル
 * ============================================================ */

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
  gap: var(--space-5);
}
.site-header__logo {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}
.site-header__logo img {
  height: 38px;
  width: auto;
  display: block;
}
.site-header__nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: flex-end;
}
.site-header__menu {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-header__menu li {
  list-style: none;
}
.site-header__menu a {
  display: inline-block;
  font-size: var(--fs-sm);
  color: var(--color-text-primary);
  font-weight: 500;
  transition: color var(--transition-base);
  white-space: nowrap;
}
.site-header__menu a:hover {
  color: var(--color-brand-primary);
}
.site-header__cta-link {
  padding: 8px 18px;
  border: 1px solid var(--color-brand-deep);
  border-radius: var(--radius-sm);
  transition: background var(--transition-base), color var(--transition-base);
}
.site-header__cta-link:hover {
  background: var(--color-brand-deep);
  color: #fff !important;
}

/* Mobile menu button (hidden on desktop) */
.site-header__mobile-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.site-header__mobile-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-brand-deep);
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.site-header__mobile-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header__mobile-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.site-header__mobile-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile drawer */
.site-header__drawer {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.site-header__drawer[hidden] {
  display: none;
}
.site-header__drawer-menu {
  display: flex;
  flex-direction: column;
  padding: var(--space-3) 0;
}
.site-header__drawer-menu a {
  display: block;
  padding: var(--space-3) var(--container-pad);
  color: var(--color-text-primary);
  font-size: var(--fs-sm);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}
.site-header__drawer-menu li:last-child a {
  border-bottom: none;
}

@media (max-width: 860px) {
  .site-header__nav { display: none; }
  .site-header__mobile-btn { display: flex; }
}

/* ---- PAGE TOP button ---- */
.page-top-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  padding: 10px 14px;
  background: var(--color-brand-deep);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), background var(--transition-base);
}
.page-top-btn.is-visible {
  opacity: 1;
  pointer-events: auto;
}
.page-top-btn:hover {
  background: var(--color-brand-deep-2);
}

/* ---- Hero ---- */
.hero {
  background: var(--color-brand-deep);
  color: var(--color-text-on-dark);
  padding-block: var(--space-10) var(--space-9);
  position: relative;
  overflow: hidden;
}
.hero__inner {
  max-width: 780px;
}
.hero__eyebrow {
  color: var(--color-brand-primary);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.hero__title {
  font-size: var(--fs-hero);
  line-height: 1.2;
  letter-spacing: 0.02em;
}
.hero__subtitle {
  margin-top: var(--space-5);
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.82);
  line-height: var(--lh-base);
  max-width: 620px;
}
.hero__cta {
  margin-top: var(--space-7);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero__title { font-size: var(--fs-2xl); }
}

/* ---- Pain Points ---- */
.painpoints__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}
.painpoints__item {
  padding: var(--space-5);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.painpoints__item::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-brand-primary);
}
.painpoints__text {
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: var(--lh-heading);
}

/* ---- Services (横スクロールカルーセル) ---- */
.services {
  background: var(--color-brand-deep);
  color: var(--color-text-on-dark);
  overflow: hidden;
}
.services .section-header__title {
  color: #fff;
}
.services__viewport {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
  margin-inline: calc(-1 * var(--container-pad));
  padding-inline: var(--container-pad);
  padding-bottom: var(--space-5);
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.25) transparent;
}
.services__viewport::-webkit-scrollbar {
  height: 6px;
}
.services__viewport::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.25);
  border-radius: 3px;
}
.services__track {
  display: flex;
  gap: var(--space-5);
  will-change: transform;
}
.service-card {
  flex: 0 0 340px;
  scroll-snap-align: start;
  background: var(--color-brand-deep-2);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  color: var(--color-text-on-dark);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}
.service-card__number {
  font-family: var(--font-sans-en);
  color: var(--color-brand-primary);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: var(--space-4);
}
.service-card__title {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
  color: #fff;
}
.service-card__body {
  color: rgba(255,255,255,0.75);
  font-size: var(--fs-sm);
  flex: 1;
}
.service-card__link {
  margin-top: var(--space-5);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-brand-primary);
}
.service-card__link::after { content: " →"; }

/* ---- Why Us ---- */
.whyus__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}
.whyus__item {
  padding: var(--space-6);
  border-left: 3px solid var(--color-brand-primary);
}
.whyus__item__title {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
  color: var(--color-brand-deep);
}
.whyus__item__body {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
}

/* ---- Case Studies ---- */
.cases__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.case-card {
  background: var(--color-brand-deep);
  color: var(--color-text-on-dark);
  padding: var(--space-6);
  border-radius: var(--radius-md);
}
.case-card__number {
  font-family: var(--font-sans-en);
  color: var(--color-brand-primary);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: var(--space-4);
}
.case-card__industry {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}
.case-card__title {
  font-size: var(--fs-md);
  color: #fff;
  margin-bottom: var(--space-3);
}
.case-card__result {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.75);
}

/* ---- CTA ---- */
.cta-section {
  background: var(--color-bg-alt);
  text-align: center;
}
.cta-section__title {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-4);
}
.cta-section__subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-7);
  font-size: var(--fs-md);
}
.cta-section__actions {
  display: inline-flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-brand-deep);
  color: rgba(255,255,255,0.55);
  padding-block: var(--space-6);
  font-size: var(--fs-xs);
  text-align: center;
}
.site-footer__copy {
  letter-spacing: 0.04em;
}