/* ========================================
   Modern CSS for merge corporation
   Inspired by array-venture.com
   ======================================== */

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #00BFA5;
  --color-primary-dark: #00a08a;
  --color-dark: #1a1a2e;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-gray: #f7f8fa;
  --color-border: #e8e8e8;
  --font-en: 'Inter', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --header-height: 72px;
  --container-width: 1100px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-jp);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
  overflow: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Section Titles */
.section-title {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: center;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.section-title--white {
  color: #fff;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: 0.05em;
}

.section-subtitle--white {
  color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s, box-shadow 0.3s;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

.header--scrolled .header__logo svg {
  color: var(--color-dark);
}

.header--scrolled .header__nav-list a {
  color: var(--color-text);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.header__logo svg {
  color: #fff;
  transition: color 0.3s;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__nav-list {
  display: flex;
  gap: 32px;
}

.header__nav-list a {
  font-family: var(--font-jp);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: #fff;
  transition: color 0.3s;
  position: relative;
}

.header__nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s;
}

.header__nav-list a:hover::after {
  width: 100%;
}

.header__cta {
  font-family: var(--font-jp);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--color-primary);
  padding: 10px 24px;
  border-radius: 4px;
  transition: background 0.3s, transform 0.2s;
}

.header__cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Hamburger */
.header__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
  z-index: 1001;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  position: absolute;
  left: 0;
  transition: all 0.3s;
}

.header--scrolled .header__hamburger span {
  background: var(--color-dark);
}

.header__hamburger span:nth-child(1) { top: 0; }
.header__hamburger span:nth-child(2) { top: 9px; }
.header__hamburger span:nth-child(3) { top: 18px; }

.header__hamburger.active span:nth-child(1) {
  top: 9px;
  transform: rotate(45deg);
  background: var(--color-dark);
}
.header__hamburger.active span:nth-child(2) {
  opacity: 0;
}
.header__hamburger.active span:nth-child(3) {
  top: 9px;
  transform: rotate(-45deg);
  background: var(--color-dark);
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.mobile-nav.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav__list {
  text-align: center;
}

.mobile-nav__list li {
  margin-bottom: 24px;
}

.mobile-nav__list a {
  font-family: var(--font-jp);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-dark);
}

.mobile-nav__cta {
  display: inline-block;
  background: var(--color-primary);
  color: #fff !important;
  padding: 12px 40px;
  border-radius: 4px;
  margin-top: 8px;
}

/* ========================================
   Hero
   ======================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 40, 60, 0.85) 0%, rgba(0, 80, 100, 0.7) 50%, rgba(0, 60, 80, 0.8) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  padding: 0 24px;
}

.hero__title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s ease-out;
}

.hero__subtitle {
  font-size: 1.1rem;
  font-weight: 300;
  opacity: 0.9;
  letter-spacing: 0.05em;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  opacity: 0.7;
  animation: bounce 2s infinite;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   Mission
   ======================================== */
.mission {
  padding: 100px 0;
  background: var(--color-bg);
}

.mission__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.mission__item {
  text-align: center;
  padding: 32px 20px;
  transition: opacity 0.6s, transform 0.6s;
}

.js-animate .mission__item {
  opacity: 0;
  transform: translateY(30px);
}

.mission__item.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.mission__item:nth-child(2) { transition-delay: 0.15s; }
.mission__item:nth-child(3) { transition-delay: 0.3s; }

.mission__icon {
  color: var(--color-primary);
  margin-bottom: 20px;
}

.mission__item h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-dark);
}

.mission__item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* ========================================
   Service
   ======================================== */
.service {
  padding: 100px 0;
  background: var(--color-bg-gray);
}

.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service__card {
  background: #fff;
  border-radius: 12px;
  padding: 40px 28px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s, box-shadow 0.3s;
}

.js-animate .service__card {
  opacity: 0;
  transform: translateY(30px);
}

.service__card.animate-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s, transform 0.6s, box-shadow 0.3s;
}

.service__card:nth-child(2) { transition-delay: 0.15s; }
.service__card:nth-child(3) { transition-delay: 0.3s; }

.service__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.service__card-icon {
  color: var(--color-primary);
  margin-bottom: 24px;
}

.service__card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.service__card-text {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}

.service__card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service__card-tags li {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(0, 191, 165, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
}

/* ========================================
   Works
   ======================================== */
.works {
  padding: 100px 0;
  background: var(--color-bg);
}

.works__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.works__card {
  display: block;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s, box-shadow 0.3s;
}

.js-animate .works__card {
  opacity: 0;
  transform: translateY(30px);
}

.works__card.animate-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s, transform 0.6s, box-shadow 0.3s;
}

.works__card:nth-child(2) { transition-delay: 0.1s; }
.works__card:nth-child(3) { transition-delay: 0.2s; }
.works__card:nth-child(4) { transition-delay: 0.3s; }

.works__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.works__card-img {
  height: 200px;
  overflow: hidden;
  background: var(--color-bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.works__card:hover .works__card-img img {
  transform: scale(1.05);
}

.works__card-body {
  padding: 24px;
}

.works__card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-dark);
}

.works__card-client {
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 10px;
}

.works__card-text {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 14px;
}

.works__card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.works__card-tags li {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg-gray);
  padding: 3px 10px;
  border-radius: 20px;
}

/* ========================================
   Recruit
   ======================================== */
.recruit {
  position: relative;
  padding: 120px 0;
  text-align: center;
  overflow: hidden;
}

.recruit__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.recruit__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 46, 0.8);
}

.recruit__content {
  position: relative;
  z-index: 1;
}

.recruit__text {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 36px;
}

/* ========================================
   Company
   ======================================== */
.company {
  padding: 100px 0;
  background: var(--color-bg-gray);
}

.company__content {
  max-width: 900px;
  margin: 0 auto;
}

.company__info {
  margin-bottom: 60px;
  transition: opacity 0.6s, transform 0.6s;
}

.js-animate .company__info {
  opacity: 0;
  transform: translateY(30px);
}

.company__info.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.company__table {
  width: 100%;
  border-collapse: collapse;
}

.company__table tr {
  border-bottom: 1px solid var(--color-border);
}

.company__table th,
.company__table td {
  padding: 20px 16px;
  text-align: left;
  font-size: 0.95rem;
}

.company__table th {
  width: 160px;
  font-weight: 600;
  color: var(--color-dark);
  white-space: nowrap;
}

.company__table td {
  color: var(--color-text-light);
}

.company__ceo {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  transition: opacity 0.6s, transform 0.6s;
}

.js-animate .company__ceo {
  opacity: 0;
  transform: translateY(30px);
}

.company__ceo.animate-in {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.15s;
}

.company__ceo-photo {
  flex-shrink: 0;
  width: 160px;
  height: 160px;
  border-radius: 12px;
  overflow: hidden;
}

.company__ceo-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.company__ceo-role {
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.company__ceo-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.company__ceo-bio {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}

.company__ceo-skills {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.03em;
}

/* ========================================
   Contact
   ======================================== */
.contact {
  padding: 100px 0;
  background: var(--color-bg);
  text-align: center;
}

.contact__text {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 2;
  margin-bottom: 36px;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 14px 48px;
  border-radius: 4px;
  transition: all 0.3s;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 191, 165, 0.3);
}

.btn--white {
  background: #fff;
  color: var(--color-dark);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.3);
}

.btn--large {
  padding: 16px 56px;
  font-size: 1rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-dark);
  padding: 48px 0;
}

.footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer__logo {
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
}

.footer__copy {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

/* ========================================
   Side CTA (StockSun style)
   ======================================== */
.side-cta {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%) translateX(100%);
  z-index: 100;
  background: #e53935;
  color: #fff;
  padding: 32px 20px;
  border-radius: 10px 0 0 10px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-decoration: none;
  box-shadow: -4px 4px 20px rgba(229, 57, 53, 0.45);
  opacity: 0;
  transition: transform 0.4s, opacity 0.4s, background 0.3s, box-shadow 0.3s;
}

.side-cta.visible {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.side-cta:hover {
  background: #c62828;
  box-shadow: -4px 4px 24px rgba(229, 57, 53, 0.65);
}

.side-cta__text {
  display: block;
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.3s, transform 0.3s, background 0.3s;
  box-shadow: 0 2px 12px rgba(0, 191, 165, 0.3);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary-dark);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header__nav {
    display: none;
  }

  .header__hamburger {
    display: block;
  }

  .section-title {
    font-size: 2rem;
  }

  .section-subtitle {
    margin-bottom: 36px;
  }

  .hero__title {
    font-size: 1.8rem;
  }

  .hero__subtitle {
    font-size: 0.9rem;
  }

  .mission__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .mission__item {
    padding: 24px 16px;
  }

  .service__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service__card {
    padding: 32px 24px;
  }

  .works__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .recruit {
    padding: 80px 24px;
  }

  .recruit__bg {
    background-attachment: scroll;
  }

  .recruit__text br {
    display: none;
  }

  .company__table th {
    width: 100px;
    font-size: 0.85rem;
  }

  .company__table td {
    font-size: 0.85rem;
  }

  .company__ceo {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px 24px;
  }

  .company__ceo-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
  }

  .contact__text br {
    display: none;
  }

  .btn {
    padding: 12px 36px;
  }

  .btn--large {
    padding: 14px 44px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.7rem;
  }
}