/* ==============================
   BASE & CSS VARIABLES
   ============================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --main:       #1A3A8F;
  --accent:     #7C3AED;
  --green:      #10B981;
  --dark:       #0D0D12;
  --white:      #ffffff;
  --gray-50:    #F8FAFC;
  --gray-100:   #F1F5F9;
  --gray-200:   #E2E8F0;
  --gray-600:   #475569;
  --gray-800:   #1E293B;
  --font:       'Noto Sans JP', sans-serif;
  --radius:     12px;
  --shadow:     0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg:  0 12px 48px rgba(0, 0, 0, 0.15);
  --transition: 0.3s ease;
  --max-w:      1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ==============================
   NAVIGATION
   ============================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 32px;
  height: 72px;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  color: white;
  transition: color var(--transition);
}

#navbar.scrolled .nav-logo { color: var(--dark); }

.nav-logo svg { display: block; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

#navbar.scrolled .nav-link { color: var(--gray-800); }

.nav-link:hover { background: rgba(255, 255, 255, 0.15); }

#navbar.scrolled .nav-link:hover {
  background: var(--gray-100);
  color: var(--main);
}


/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

#navbar.scrolled .nav-hamburger span { background: var(--dark); }

.nav-hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--white) !important; }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--white) !important; }

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

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    #040b1e 0%,
    #0D1B4B 20%,
    #1A3A8F 42%,
    #5b21b6 65%,
    #7C3AED 80%,
    #059669 92%,
    #10B981 100%
  );
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1639762681485-074b7f938ba0?auto=format&fit=crop&w=1920&q=50') center / cover no-repeat;
  opacity: 0.06;
  mix-blend-mode: overlay;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, transparent 40%, rgba(4, 11, 30, 0.5) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 860px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 28px;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.12;
  color: var(--white);
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 52px;
  line-height: 2;
}

.btn-hero {
  display: inline-block;
  padding: 18px 56px;
  background: var(--green);
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50px;
  letter-spacing: 0.08em;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.45);
}

.btn-hero:hover {
  background: #059669;
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(16, 185, 129, 0.55);
}

.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero-scroll span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.hero-scroll span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 2px;
  animation: scrollDot 1.8s ease infinite;
}

@keyframes scrollDot {
  0%, 100% { opacity: 1; top: 6px; }
  50%       { opacity: 0.2; top: 20px; }
}

/* ==============================
   SHARED SECTION STYLES
   ============================== */
.section { padding: 100px 24px; }

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  color: var(--dark);
  letter-spacing: -0.02em;
}

.section-header--light .section-title { color: var(--white); }
.section-header--light .section-label { color: rgba(255, 255, 255, 0.6); }

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ==============================
   ABOUT
   ============================== */
.about { background: var(--gray-50); }

.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 64px;
  align-items: center;
}

.about-table table {
  width: 100%;
  border-collapse: collapse;
}

.about-table th,
.about-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.875rem;
  line-height: 1.7;
  vertical-align: top;
}

.about-table th {
  width: 130px;
  color: var(--main);
  font-weight: 700;
  white-space: nowrap;
}

.about-table td a { color: var(--accent); transition: opacity var(--transition); }
.about-table td a:hover { opacity: 0.75; text-decoration: underline; }

.about-table td ul {
  padding-left: 18px;
  list-style: disc;
}

.about-table td ul li { margin-bottom: 4px; }

.about-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  width: 100%;
  height: 460px;
}

/* ==============================
   CEO MESSAGE
   ============================== */
.ceo { padding: 0; }

.ceo-inner {
  background: linear-gradient(135deg, #080f2b 0%, #0D1B4B 30%, #1A3A8F 55%, #7C3AED 100%);
  padding: 100px 24px;
}

.ceo-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  align-items: start;
}

.ceo-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  width: 100%;
  height: 380px;
  filter: grayscale(15%) brightness(0.95);
}

.ceo-text p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.925rem;
  margin-bottom: 22px;
  line-height: 1.95;
}

.ceo-signature {
  color: var(--white) !important;
  font-weight: 700 !important;
  margin-top: 32px !important;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.95rem !important;
}

/* ==============================
   SERVICES
   ============================== */
.services { background: var(--white); }

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.service-card {
  border-radius: 16px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-image {
  overflow: hidden;
  height: 220px;
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-card:hover .service-image img { transform: scale(1.06); }

.service-body { padding: 32px; }

.service-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--main), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-icon svg { width: 22px; height: 22px; stroke: white; }
.service-icon--green { background: linear-gradient(135deg, #059669, var(--green)); }

.service-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.service-text {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.85;
}

/* ==============================
   CAREERS
   ============================== */
.careers { background: var(--gray-50); }

.careers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.career-card {
  background: var(--white);
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}

.career-card--inactive { opacity: 0.55; }

.career-badge {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.career-badge--open   { background: #d1fae5; color: #065f46; }
.career-badge--closed { background: var(--gray-100); color: var(--gray-600); }

.career-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
}

.career-requirements {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 28px;
  color: var(--gray-600);
}

.career-requirements li { margin-bottom: 8px; font-size: 0.875rem; }

.career-apply-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--main);
  margin-bottom: 6px;
}

.career-apply-desc {
  font-size: 0.85rem;
  color: var(--gray-600);
  margin-bottom: 20px;
}

.btn-career {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--main), var(--accent));
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 32px;
  letter-spacing: 0.05em;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(26, 58, 143, 0.3);
}

.btn-career:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 58, 143, 0.4);
}

.career-inactive-text {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ==============================
   CONTACT
   ============================== */
.contact { background: var(--white); }

.contact-form-outer {
  max-width: 720px;
  margin: 0 auto;
}

/* Form */
.contact-form-wrap { position: relative; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 8px;
}

.required { color: #ef4444; margin-left: 2px; }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.875rem;
  color: var(--gray-800);
  background: var(--gray-50);
  outline: none;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
  background: var(--white);
}

.form-error {
  display: block;
  color: #ef4444;
  font-size: 0.8rem;
  margin-bottom: 12px;
  min-height: 20px;
}

.btn-submit {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--main), var(--accent));
  color: var(--white);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(26, 58, 143, 0.3);
}

.btn-submit:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(26, 58, 143, 0.4);
}

.btn-submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.form-success {
  display: none;
  text-align: center;
  padding: 52px 24px;
  background: #ecfdf5;
  border-radius: var(--radius);
  border: 1.5px solid #a7f3d0;
  color: #065f46;
  font-weight: 700;
  line-height: 1.9;
  font-size: 0.95rem;
}

.form-success.visible { display: block; }

/* ==============================
   FOOTER
   ============================== */
.footer {
  background: var(--dark);
  padding: 48px 24px;
  text-align: center;
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.footer-logo svg { display: block; }

.footer-copy {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.08em;
}

/* ==============================
   RESPONSIVE — tablet
   ============================== */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-image img { height: 340px; }

  .ceo-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ceo-image img {
    height: 280px;
    max-width: 480px;
  }

}

/* ==============================
   RESPONSIVE — mobile
   ============================== */
@media (max-width: 768px) {
  .section { padding: 72px 20px; }

  .nav-hamburger { display: flex; }

  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    background: #040b1e;
    transform: translateY(-100%);
    transition: transform 0.4s ease;
    z-index: 1050;
    isolation: isolate;
    overflow-y: auto;
  }

  .nav-menu.open { transform: none; }

  /* force white text in mobile menu regardless of scroll state */
  .nav-menu .nav-link,
  #navbar.scrolled .nav-menu .nav-link {
    font-size: 1.2rem;
    color: var(--white) !important;
    padding: 14px 32px;
    border-radius: 8px;
  }

  .nav-menu .nav-link:hover,
  #navbar.scrolled .nav-menu .nav-link:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--white) !important;
  }

  .services-grid,
  .careers-grid {
    grid-template-columns: 1fr;
  }

  .form-row { grid-template-columns: 1fr; }

  .hero-sub br { display: none; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.4rem; }
  .about-image img { height: 260px; }
}