/* ===== VARIABLES ===== */
:root {
  --primary: #009688;
  --primary-light: #E0F2F1;
  --primary-dark: #00796B;
  --white: #FFFFFF;
  --bg: #FAFCFC;
  --gray-50: #F8FAFA;
  --gray-100: #F0F4F4;
  --gray-200: #E0E7E7;
  --gray-300: #C8D4D4;
  --gray-500: #7A8E8E;
  --gray-700: #3D4F4F;
  --gray-900: #1A2B2B;
  --font-en: 'Inter', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --transition: 0.3s ease;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 16px;
}

/* ===== RESET ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-jp);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul, ol { list-style: none; }

/* ===== CONTAINER ===== */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== SECTION ===== */
.section {
  padding: 100px 0;
}

.section-label {
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  display: block;
}

.section-label.center,
.section-title.center,
.section-desc.center {
  text-align: center;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 48px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: var(--font-jp);
  letter-spacing: 0.02em;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,150,136,0.3);
}

.btn-ghost {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: var(--white);
  color: var(--gray-900);
}

.btn-lg {
  padding: 18px 48px;
  font-size: 1rem;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  transition: var(--transition);
}

.logo-sub {
  font-family: var(--font-jp);
  font-size: 0.65rem;
  font-weight: 400;
  display: block;
  letter-spacing: 0.1em;
  margin-top: -2px;
}

.header.scrolled .logo-text {
  color: var(--gray-900);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  transition: var(--transition);
}

.header.scrolled .nav-link {
  color: var(--gray-700);
}

.nav-link:hover {
  color: var(--primary);
}

.nav-cta {
  background: var(--primary);
  color: var(--white) !important;
  padding: 8px 24px;
  border-radius: 50px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--primary-dark);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

.header.scrolled .hamburger span {
  background: var(--gray-900);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== 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;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,96,88,0.85) 0%, rgba(0,150,136,0.65) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: 0 24px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 8px 24px;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 50px;
  margin-bottom: 28px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1rem;
  line-height: 2;
  opacity: 0.9;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.about-desc {
  font-size: 0.95rem;
  color: var(--gray-700);
  margin-bottom: 16px;
  line-height: 2;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: 50px;
  font-weight: 500;
}

/* ===== SERVICES ===== */
.services {
  background: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--white);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--primary);
  transition: height 0.3s ease;
}

.service-card:hover::before {
  height: 100%;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-icon {
  margin-bottom: 20px;
}

.service-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 16px;
}

.service-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.service-link:hover {
  color: var(--primary-dark);
}

/* ===== STRENGTHS ===== */
.strengths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.strength-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.strength-card:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  transform: translateY(-4px);
}

.strength-number {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.3;
  margin-bottom: 12px;
}

.strength-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.strength-desc {
  font-size: 0.85rem;
  color: var(--gray-700);
  line-height: 1.8;
}

/* ===== NUMBERS ===== */
.numbers {
  background: var(--primary);
  padding: 80px 0;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.number-value {
  font-family: var(--font-en);
  font-size: 3rem;
  font-weight: 700;
  color: var(--white);
}

.number-suffix {
  font-family: var(--font-en);
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
}

.number-label {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-top: 8px;
}

/* ===== CASES ===== */
.cases {
  background: var(--gray-50);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.case-card {
  background: var(--white);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-industry {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.case-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.6;
}

.case-desc {
  font-size: 0.85rem;
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 16px;
}

.case-meta {
  display: flex;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-200);
}

.case-meta span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
}

/* ===== FLOW ===== */
.flow-timeline {
  max-width: 650px;
  margin: 48px auto 0;
  position: relative;
}

.flow-timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--gray-200);
}

.flow-step {
  display: flex;
  gap: 28px;
  margin-bottom: 32px;
  position: relative;
}

.flow-step:last-child {
  margin-bottom: 0;
}

.flow-dot {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--primary);
  position: relative;
  z-index: 1;
  margin-top: 4px;
}

.flow-card {
  background: var(--gray-50);
  padding: 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  flex: 1;
}

.flow-num {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
  display: block;
}

.flow-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.flow-desc {
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.8;
}

/* ===== FAQ ===== */
.faq {
  background: var(--gray-50);
}

.faq-list {
  max-width: 750px;
  margin: 48px auto 0;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-jp);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-900);
  text-align: left;
  gap: 16px;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--primary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.8;
}

/* ===== COMPANY ===== */
.company-table-wrap {
  max-width: 750px;
  margin: 48px auto 0;
}

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

.company-table th,
.company-table td {
  padding: 16px 20px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--gray-200);
  text-align: left;
}

.company-table th {
  width: 28%;
  color: var(--gray-700);
  font-weight: 500;
  background: var(--gray-50);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--gray-50);
}

.contact-wrap {
  max-width: 700px;
  margin: 0 auto;
}

.contact-form {
  background: var(--white);
  padding: 48px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
}

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

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.required {
  font-size: 0.7rem;
  color: var(--white);
  background: var(--primary);
  padding: 2px 8px;
  border-radius: 50px;
  margin-left: 4px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-jp);
  font-size: 0.9rem;
  transition: var(--transition);
  background: var(--white);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,150,136,0.1);
}

.form-textarea {
  resize: vertical;
}

.form-submit {
  text-align: center;
  margin-top: 32px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--gray-900);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer .logo-text {
  color: var(--white);
}

.footer-desc {
  font-size: 0.85rem;
  margin-top: 16px;
  line-height: 1.8;
}

.footer-links h4 {
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links a,
.footer-info {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 10px;
  color: rgba(255,255,255,0.5);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 40px;
    transition: right 0.3s ease;
    box-shadow: var(--shadow-lg);
  }

  .nav.active {
    right: 0;
  }

  .nav-link {
    color: var(--gray-900) !important;
    font-size: 1rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

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

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

  .strengths-grid {
    grid-template-columns: 1fr;
  }

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cases-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-form {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .number-value {
    font-size: 2rem;
  }

  .about-tags {
    gap: 6px;
  }
}

/* ===== ADDITIONAL STYLES ===== */
/* Hero enhanced animations */
.hero-badge {
  animation: fadeInDown 0.8s ease forwards;
}

.hero-title {
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-desc {
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-actions {
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Service card enhanced */
.service-card .service-icon svg {
  transition: var(--transition);
}

.service-card:hover .service-icon svg {
  transform: scale(1.1);
}

/* Strength card counter */
.strength-card:hover .strength-number {
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

/* Flow timeline animation */
.flow-step .flow-dot {
  transition: var(--transition);
}

.flow-step:hover .flow-dot {
  background: var(--primary);
  transform: scale(1.2);
}

.flow-step:hover .flow-card {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* Case card hover effect */
.case-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.case-card {
  position: relative;
  overflow: hidden;
}

.case-card:hover::after {
  width: 100%;
}

/* Company table hover */
.company-table tr:hover td {
  background: var(--primary-light);
  transition: background 0.3s ease;
}

/* Contact form textarea */
.form-group {
  margin-bottom: 0;
}

/* Button focus states */
.btn:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Nav link active state */
.nav-link.active {
  color: var(--primary) !important;
  font-weight: 600;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Selection color */
::selection {
  background: var(--primary-light);
  color: var(--gray-900);
}