@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&display=swap');

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

:root {
  --bg: #faf9f7;
  --bg-alt: #f0eee9;
  --white: #ffffff;
  --text: #1a1a1a;
  --text-mid: #444444;
  --text-muted: #888888;
  --accent: #26499d;
  --border: #e0ddd7;
  --border-light: #eeece7;
  --serif: 'DM Sans', 'Zen Kaku Gothic New', sans-serif;
  --sans: 'Zen Kaku Gothic New', 'Helvetica Neue', Arial, sans-serif;
  --ease: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.9;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ========== HEADER ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1100;
  padding: 1.5rem 4vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(250, 249, 247, 0.4);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: background var(--ease), box-shadow var(--ease);
}

.site-header.scrolled {
  background: rgba(250, 249, 247, 0.55);
}

.site-logo {
  font-family: var(--sans);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
  text-transform: lowercase;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo .logo-mark {
  height: 20px;
  width: auto;
}

.site-logo .logo-text {
  height: 18px;
  width: auto;
}

.nav-desktop {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-desktop a {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  transition: color var(--ease);
}

.nav-desktop a:hover {
  color: var(--accent);
}

.nav-desktop a.active {
  color: var(--accent);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 7px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1200;
  position: relative;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 1.5px;
  background: var(--text);
  transition: transform var(--ease), opacity var(--ease);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}

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

.hamburger.open span:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

/* Mobile Nav */
.nav-mobile {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.nav-mobile.open {
  opacity: 1;
  visibility: visible;
}

.nav-mobile a {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-mid);
  transition: color var(--ease), transform 0.4s ease, opacity 0.4s ease;
  opacity: 0;
  transform: translateY(12px);
}

.nav-mobile.open a {
  opacity: 1;
  transform: translateY(0);
}

.nav-mobile.open a:nth-child(1) { transition-delay: 0.08s; }
.nav-mobile.open a:nth-child(2) { transition-delay: 0.16s; }
.nav-mobile.open a:nth-child(3) { transition-delay: 0.24s; }
.nav-mobile.open a:nth-child(4) { transition-delay: 0.32s; }

.nav-mobile a:hover {
  color: var(--accent);
}

/* ========== HERO ========== */
.hero {
  min-height: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 7.5rem 8vw 0;
  position: relative;
}

.hero-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 2.5rem;
  color: var(--text);
}

.hero-title em {
  font-style: normal;
  display: inline;
}

.hero-desc {
  font-size: 0.92rem;
  color: var(--text-mid);
  max-width: 520px;
  line-height: 2.1;
  margin-bottom: 2.5rem;
}

.btn-about {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.8rem 2rem;
  transition: background var(--ease), color var(--ease);
}

.btn-about:hover {
  background: var(--accent);
  color: #fff;
}

.btn-about .arrow {
  transition: transform var(--ease);
  font-size: 0.85rem;
}

.btn-about:hover .arrow {
  transform: translateX(3px);
}

.hero-scroll {
  position: fixed;
  bottom: 3rem;
  right: 4vw;
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-muted);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  z-index: 50;
  transition: opacity 0.4s ease;
}

.hero-scroll.hidden {
  opacity: 0;
  pointer-events: none;
}

.hero-scroll::after {
  content: '';
  width: 1px;
  height: 50px;
  background: var(--text);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ========== SECTIONS ========== */
.section {
  padding: 3.75rem 8vw;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.2rem;
}

.section-desc {
  color: var(--text-mid);
  max-width: 560px;
  font-size: 0.88rem;
  line-height: 2.1;
}

/* ========== SERVICES CARDS ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.service-card {
  padding: 3.5rem 2.5rem;
  border-top: 2px solid var(--accent);
  position: relative;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: background var(--ease);
}

.service-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.service-card:hover {
  background: linear-gradient(180deg, rgba(38,73,157,0.035) 0%, rgba(38,73,157,0.01) 60%, rgba(250,249,247,0) 100%);
  box-shadow: 0 12px 40px rgba(38,73,157,0.05);
}

.service-card .card-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 2rem;
}

.service-card h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 1.2rem;
  letter-spacing: 0.03em;
  color: var(--text);
}

.service-card p {
  color: var(--text-mid);
  font-size: 0.84rem;
  line-height: 2;
}

.card-more {
  display: block;
  margin-top: auto;
  padding-top: 1.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.service-card:hover .card-more {
  opacity: 1;
  transform: translateX(0);
}

/* ========== PAGE HERO ========== */
.page-hero {
  padding: 7.5rem 8vw 1rem;
}

.page-hero .section-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 0.8rem;
}

.page-hero .section-desc {
  margin-bottom: 0;
}

/* ========== SERVICE DETAIL ========== */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 3.75rem 8vw;
  scroll-margin-top: 5rem;
}

.service-detail .detail-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.service-detail .detail-content .detail-label {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.service-detail .detail-content .detail-label::before {
  content: '';
  width: 16px;
  height: 1px;
  background: var(--accent);
}

.service-detail .detail-content h2 {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.service-detail .detail-content p {
  color: var(--text-mid);
  font-size: 0.88rem;
  line-height: 2.1;
  margin-bottom: 2rem;
}

.service-detail .detail-content ul {
  list-style: none;
  padding: 0;
}

.service-detail .detail-content ul li {
  font-size: 0.84rem;
  color: var(--text-mid);
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-light);
  padding-left: 1rem;
  position: relative;
}

.service-detail .detail-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateY(-50%);
}

/* ========== PORTFOLIO GRID ========== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.portfolio-item .portfolio-image {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  transition: transform var(--ease);
}

.portfolio-item:hover .portfolio-image {
  transform: scale(1.02);
}

.portfolio-item .portfolio-info {
  padding: 1rem 0;
}

.portfolio-item .portfolio-info h3 {
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 0.2rem;
}

.portfolio-item .portfolio-info span {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.portfolio-filter {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.portfolio-filter button {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 1.2rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all var(--ease);
  font-family: var(--sans);
  border-radius: 100px;
}

.portfolio-filter button:hover {
  color: var(--text);
}

.portfolio-filter button.active {
  background: var(--accent);
  color: #fff;
}

/* ========== COMPANY ========== */
.company-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.company-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

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

.company-info-table tr {
  border-bottom: 1px solid var(--border-light);
}

.company-info-table th,
.company-info-table td {
  padding: 1.3rem 0;
  font-weight: 400;
  font-size: 0.88rem;
  text-align: left;
  vertical-align: top;
}

.company-info-table th {
  color: var(--text);
  width: 130px;
  font-size: 0.82rem;
  font-weight: 500;
}

.company-info-table td {
  color: var(--text-mid);
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.about-intro-ja p {
  color: var(--text-mid);
  font-size: 0.92rem;
  line-height: 2.2;
  margin-bottom: 1.5rem;
}

.about-intro-ja p:last-child {
  margin-bottom: 0;
}

.about-intro-en p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 2;
  margin-bottom: 1.5rem;
}

.about-intro-en p:last-child {
  margin-bottom: 0;
}

/* ========== CONTACT FORM ========== */
.contact-layout {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 6rem;
}

.contact-info h3 {
  font-family: var(--serif);
  font-size: 0.92rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--text);
}

.contact-info p {
  color: var(--text-mid);
  font-size: 0.84rem;
  line-height: 2.1;
  margin-bottom: 1.5rem;
}

.contact-info ul {
  list-style: none;
  padding: 0;
}

.contact-info ul li {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.4rem 0;
  padding-left: 1rem;
  position: relative;
  line-height: 1.9;
}

.contact-info ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

.contact-info a {
  color: var(--accent);
}

.contact-info-item {
  margin-bottom: 1.8rem;
}

.contact-info-item .label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.contact-info-item .value {
  color: var(--text);
  font-size: 0.92rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  font-weight: 500;
}

.form-group label .required {
  color: var(--accent);
  font-size: 0.65rem;
  margin-left: 0.3rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.9rem 1rem;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 400;
  outline: none;
  transition: border-color var(--ease);
  border-radius: 0;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-agree {
  margin-top: 0.5rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.84rem;
  color: var(--text-mid);
  cursor: pointer;
}

.checkbox-label span a {
  color: var(--accent);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 1px solid var(--border);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
  background-color: var(--white);
  background-image: none;
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked {
  background-color: var(--white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8l4 4 6-7' fill='none' stroke='%231a1a1a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 14px;
  background-position: center;
  background-repeat: no-repeat;
  border-color: var(--text);
}

.form-note {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 2;
  text-align: center;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 1rem 3rem;
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: opacity var(--ease);
  font-family: var(--sans);
  align-self: flex-start;
}

.btn-submit:hover {
  opacity: 0.7;
}

/* ========== PRIVACY ========== */
.privacy-content {
  max-width: 720px;
}

.privacy-content p {
  color: var(--text-mid);
  font-size: 0.88rem;
  line-height: 2.1;
  margin-bottom: 1.5rem;
}

.privacy-content h3 {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin-top: 2.5rem;
  margin-bottom: 0.8rem;
}

.privacy-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.privacy-content ul li {
  font-size: 0.84rem;
  color: var(--text-mid);
  padding: 0.5rem 0;
  padding-left: 1rem;
  position: relative;
}

.privacy-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateY(-50%);
}

.privacy-content a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.privacy-content a:hover {
  border-bottom-color: var(--accent);
}

.privacy-date {
  margin-top: 3rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ========== CTA SECTION ========== */
.cta-section {
  padding: 2.5rem 8vw;
}


.cta-section .section-title {
  margin-bottom: 1rem;
}

.cta-section .section-desc {
  margin: 0 auto 3rem;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.8rem 2rem;
  transition: background var(--ease), color var(--ease);
}

.btn-cta:hover {
  background: var(--accent);
  color: #fff;
}

.btn-cta .arrow {
  transition: transform var(--ease);
  font-size: 0.85rem;
}

.btn-cta:hover .arrow {
  transform: translateX(3px);
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 1.5rem 8vw 2.5rem;
  background: var(--bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-left .copyright {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.footer-nav {
  display: flex;
  gap: 2.5rem;
}

.footer-nav a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--ease);
}

.footer-nav a:hover {
  color: var(--accent);
}

/* ========== ANIMATIONS ========== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }


  .service-detail {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .service-detail .detail-content {
    order: 1;
  }

  .service-detail .detail-image {
    order: 2;
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .company-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

@media (max-width: 768px) {
  .site-header {
    padding: 1.2rem 5vw;
  }

  .nav-desktop {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 5.5rem 6vw 0;
  }

  .section {
    padding: 4rem 6vw;
  }

  .page-hero {
    padding: 6rem 6vw 2rem;
  }

  .service-detail {
    padding: 3rem 6vw;
  }

  .portfolio-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .site-footer {
    flex-direction: column;
    gap: 1.2rem;
    align-items: flex-start;
    padding: 2rem 6vw 2.5rem;
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .hero-scroll {
    right: 5vw;
  }
}

@media (max-width: 480px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}