/* ==========================================================================
   Components — BEM naming, mobile-first
   ========================================================================== */

/* ==========================================================================
   Site Header
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.875rem var(--container-padding-mobile);
}

@media (min-width: 1280px) {
  .site-header {
    padding: 1.875rem 2.625rem;
  }
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
}

.site-header__logo {
  display: block;
  width: 10.6rem;
}

.site-header__logo img {
  width: 100%;
  height: auto;
}

.site-header__nav {
  display: none;
}

@media (min-width: 1280px) {
  .site-header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
  }
}

.site-header__nav-item {
  position: relative;
  font-family: var(--font-family-heading);
  font-size: var(--text-size-body);
  font-weight: var(--text-weight-medium);
  color: var(--color-text);
  padding-top: 1.0625rem;
  transition: color var(--transition-base);
}

.site-header__nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 3.125rem;
  height: 2px;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.site-header__nav-item:hover::before,
.site-header__nav-item--active::before {
  opacity: 1;
}

/* Mobile menu toggle */
.site-header__menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

@media (min-width: 1280px) {
  .site-header__menu-toggle {
    display: none;
  }
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-text);
  color: var(--color-text-inverse);
  padding: 2rem var(--container-padding-mobile);
}

@media (min-width: 1280px) {
  .site-footer {
    padding: 2rem 2.5rem;
  }
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-width: var(--container-max);
  margin: 0 auto;
}

@media (min-width: 1280px) {
  .site-footer__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.site-footer__logo {
  width: 10.6rem;
}

.site-footer__logo img {
  width: 100%;
  height: auto;
}

.site-footer__info {
  font-size: var(--text-size-sm);
  line-height: 1.5;
}

.site-footer__info-tel {
  font-family: var(--font-family-heading);
  letter-spacing: 0.04em;
}

.site-footer__map-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 7.5rem;
  height: 2.125rem;
  border: var(--border-width) solid var(--color-text-inverse);
  border-radius: var(--radius-lg);
  font-family: var(--font-family-heading);
  font-size: var(--text-size-sm);
  letter-spacing: 0.04em;
  transition: opacity var(--transition-base);
}

.site-footer__map-link:hover {
  opacity: 0.7;
}

.site-footer__copyright {
  font-family: var(--font-family-heading);
  font-size: var(--text-size-xs);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 53.125rem;
  overflow: hidden;
  background-color: var(--color-surface);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero__bg-shape {
  position: absolute;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 0 var(--container-padding-mobile);
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

@media (min-width: 1280px) {
  .hero__content {
    padding-left: 7.5rem;
  }
}

.hero__title-en {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-bold);
  font-size: clamp(3rem, 8vw, var(--text-size-hero));
  line-height: 1.17;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.hero__title-ja {
  font-family: var(--font-family-base);
  font-weight: var(--text-weight-medium);
  font-size: clamp(1rem, 2vw, var(--text-size-xl));
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--color-text);
  margin-top: var(--space-md);
}

/* ==========================================================================
   Scroll Indicator
   ========================================================================== */

.scroll-indicator {
  position: absolute;
  right: 3.125rem;
  bottom: 0;
  z-index: 2;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

@media (min-width: 1280px) {
  .scroll-indicator {
    display: flex;
  }
}

.scroll-indicator__text {
  font-family: var(--font-family-heading);
  font-size: 0.875rem;
  writing-mode: vertical-rl;
  color: var(--color-text);
}

.scroll-indicator__line {
  width: 1px;
  height: 4.375rem;
  background-color: var(--color-text);
}

/* ==========================================================================
   Section Heading
   ========================================================================== */

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.section-heading__icon {
  flex-shrink: 0;
  width: 6.78rem;
  height: 7.34rem;
  margin-top: -0.5rem;
}

.section-heading__title {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-bold);
  font-size: clamp(1.75rem, 3vw, var(--text-size-3xl));
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

/* ==========================================================================
   Our Message
   ========================================================================== */

.our-message {
  position: relative;
  padding: var(--space-2xl) var(--container-padding-mobile);
}

@media (min-width: 1280px) {
  .our-message {
    padding: var(--space-2xl) var(--container-padding);
  }
}

.our-message__heading {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-bold);
  font-size: clamp(2rem, 3.5vw, 2.8125rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.our-message__bg-shape {
  position: absolute;
  z-index: -1;
}

.our-message__text {
  font-weight: var(--text-weight-medium);
  font-size: var(--text-size-lg);
  line-height: 3.1;
  color: var(--color-text);
  margin-top: var(--space-lg);
}

@media (min-width: 1280px) {
  .our-message__body {
    display: flex;
    gap: var(--space-2xl);
  }

  .our-message__text {
    margin-top: 0;
  }
}

/* ==========================================================================
   Service Circle
   ========================================================================== */

.service-circles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  justify-items: center;
}

@media (min-width: 1280px) {
  .service-circles {
    grid-template-columns: repeat(4, 1fr);
  }
}

.service-circle {
  position: relative;
  width: clamp(10rem, 25vw, 22.5rem);
  aspect-ratio: 1;
  border-radius: var(--radius-full);
  overflow: hidden;
  cursor: pointer;
}

.service-circle__bg {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 188, 134, 0.15);
}

.service-circle__icon {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translateX(-50%);
}

.service-circle__title-en {
  position: absolute;
  bottom: 30%;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-medium);
  font-size: clamp(1rem, 2vw, 1.75rem);
  line-height: 1.86;
  text-align: center;
  white-space: nowrap;
  color: var(--color-text);
}

.service-circle__title-ja {
  position: absolute;
  bottom: 22%;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-size-sm);
  text-align: center;
  white-space: nowrap;
  color: var(--color-text);
}

.service-circle__overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: rgba(0, 188, 134, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-circle:hover .service-circle__overlay {
  opacity: 1;
}

.service-circle__overlay-text {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-medium);
  font-size: 1.375rem;
  letter-spacing: 0.06em;
  color: var(--color-text-inverse);
}

/* ==========================================================================
   Solution Card
   ========================================================================== */

.solution-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.solution-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

@media (min-width: 1280px) {
  .solution-card {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-lg);
  }

  .solution-card--reverse {
    flex-direction: row-reverse;
  }
}

.solution-card__image-wrap {
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
}

.solution-card__image-wrap img {
  width: 100%;
  height: auto;
}

.solution-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.solution-card__label {
  font-family: var(--font-family-heading);
  font-size: 0.875rem;
  line-height: 2;
  color: var(--color-secondary);
}

.solution-card__title {
  font-weight: var(--text-weight-medium);
  font-size: var(--text-size-xl);
  line-height: 1.15;
  color: var(--color-text);
}

.solution-card__description {
  font-size: var(--text-size-sm);
  line-height: 1.75;
  color: var(--color-text);
}

/* ==========================================================================
   Works Card
   ========================================================================== */

.works-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .works-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.works-card {
  cursor: pointer;
}

.works-card__image-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 460 / 300;
}

.works-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.works-card:hover .works-card__image-wrap img {
  transform: scale(1.03);
}

.works-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(235, 235, 235, 0.7);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.works-card:hover .works-card__overlay {
  opacity: 1;
}

.works-card__overlay-text {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-medium);
  font-size: 1.375rem;
  letter-spacing: 0.06em;
  color: var(--color-text-inverse);
}

.works-card__category {
  font-family: var(--font-family-heading);
  font-size: 0.875rem;
  line-height: 2.43;
  color: var(--color-primary);
  margin-top: var(--space-xs);
}

.works-card__title {
  font-weight: var(--text-weight-medium);
  font-size: var(--text-size-lg);
  line-height: 1.83;
  color: var(--color-text);
}

/* ==========================================================================
   Case Study Card
   ========================================================================== */

.case-study {
  position: relative;
}

.case-study__bg-image {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.case-study__bg-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-study-card {
  background-color: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  max-width: 33.75rem;
}

.case-study-card__category {
  font-size: 0.875rem;
  line-height: 3.29;
  color: var(--color-primary);
}

.case-study-card__title {
  font-weight: var(--text-weight-medium);
  font-size: var(--text-size-xl);
  line-height: 1.88;
  color: var(--color-text);
}

.case-study-card__description {
  font-size: var(--text-size-body);
  line-height: var(--text-line-height-base);
  color: var(--color-text);
  margin-top: var(--space-sm);
}

.case-study-card__action {
  margin-top: var(--space-lg);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

/* Primary Button (More) */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  max-width: 23.75rem;
  height: 3.75rem;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-medium);
  font-size: 1.25rem;
  letter-spacing: 0.07em;
  cursor: pointer;
  overflow: hidden;
  transition: opacity var(--transition-base);
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-primary__arrow {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0.667rem;
  height: 1.155rem;
}

/* Secondary Button (View) */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 15rem;
  height: 3.125rem;
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: var(--border-width) solid var(--color-primary);
  border-radius: var(--radius-lg);
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-medium);
  font-size: 1rem;
  letter-spacing: 0.07em;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-secondary__arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0.5rem;
  height: 1rem;
}

/* ==========================================================================
   News List
   ========================================================================== */

.news-list {
  display: flex;
  flex-direction: column;
}

.news-list__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 var(--space-lg);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-base);
  cursor: pointer;
}

.news-list__item:hover {
  color: var(--color-primary);
}

.news-list__item:hover .news-list__title {
  text-decoration: underline;
  color: var(--color-primary);
}

.news-list__date {
  font-family: var(--font-family-heading);
  font-size: 0.875rem;
  line-height: 2.14;
  flex-shrink: 0;
}

.news-list__title {
  font-size: var(--text-size-body);
  line-height: 1.67;
  transition: color var(--transition-base);
}

/* ==========================================================================
   Partnership
   ========================================================================== */

.partnership {
  text-align: center;
}

.partnership__title {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-bold);
  font-size: var(--text-size-2xl);
  line-height: 0.94;
  color: var(--color-text);
}

.partnership__logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg) var(--space-2xl);
  margin-top: var(--space-xl);
}

.partnership__logo {
  max-height: 4.5rem;
  mix-blend-mode: multiply;
}

/* ==========================================================================
   Contact CTA
   ========================================================================== */

.contact-cta {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl) var(--container-padding-mobile);
  min-height: 25rem;
}

@media (min-width: 1280px) {
  .contact-cta {
    min-height: 43.75rem;
  }
}

.contact-cta__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.contact-cta__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-cta__icon {
  width: 4.9rem;
  height: 3.18rem;
  margin-bottom: var(--space-md);
}

.contact-cta__title {
  font-family: var(--font-family-heading);
  font-weight: var(--text-weight-bold);
  font-size: var(--text-size-2xl);
  line-height: 0.56;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.contact-cta__subtitle {
  font-weight: var(--text-weight-medium);
  font-size: var(--text-size-lg);
  line-height: 3.39;
  color: var(--color-text);
}

/* ==========================================================================
   Back to Top
   ========================================================================== */

.back-to-top {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  width: 3.8125rem;
  height: 3.8125rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 50;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

/* ==========================================================================
   Page Hero (sub pages)
   ========================================================================== */

.page-hero {
  padding: 10rem var(--container-padding-mobile) 4rem;
  background-color: var(--color-background);
}

.page-hero__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.page-hero__title-en {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
}

.page-hero__title-ja {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: 0.5rem;
}

@media (min-width: 1280px) {
  .page-hero {
    padding: 12rem 2.625rem 5rem;
  }

  .page-hero__title-en {
    font-size: 4.5rem;
  }

  .page-hero__title-ja {
    font-size: 1rem;
  }
}

/* ==========================================================================
   Company Table (about page)
   ========================================================================== */

.company-table__list {
  max-width: 800px;
  margin: 0 auto;
}

.company-table__row {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.company-table__label {
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.company-table__value {
  font-size: 0.9375rem;
  line-height: 1.8;
}

@media (min-width: 768px) {
  .company-table__row {
    flex-direction: row;
    gap: 2rem;
  }

  .company-table__label {
    min-width: 120px;
    margin-bottom: 0;
  }
}

/* ==========================================================================
   About Message
   ========================================================================== */

.about-message {
  max-width: 700px;
  margin: 0 auto;
}

.about-message__text {
  font-size: 0.9375rem;
  line-height: 2.2;
  white-space: pre-line;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-lead {
  text-align: center;
  font-size: 0.9375rem;
  line-height: 2;
  white-space: pre-line;
  margin-bottom: 3rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.contact-method {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.contact-method__title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.contact-method__tel {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.contact-method__note {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.contact-method__address {
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .contact-methods {
    flex-direction: row;
    max-width: 900px;
  }

  .contact-method {
    flex: 1;
  }
}

/* ==========================================================================
   Decorative Elements
   ========================================================================== */

.deco-shape {
  position: absolute;
  pointer-events: none;
  z-index: -1;
}

.deco-shape img {
  width: 100%;
  height: 100%;
}