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

:root {
  --bg: #FAFAF8;
  --bg-soft: #F1F2EE;
  --bg-dark: #111111;
  --text: #1A1A1A;
  --text-light: #666666;
  --border: #E0E0DC;
  --white: #FFFFFF;
  --sage: #DDE5D8;
  --clay: #E8DDD3;
  --mist: #DDE5E8;
  --accent: #1A1A1A;
  --font-en: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-jp: 'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --transition: 0.3s ease;
  --shadow: 0 2px 20px rgba(0,0,0,0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 15px;
}

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

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

ul {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 {
  font-family: var(--font-en);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.3;
}

.section-title {
  font-family: var(--font-en);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
  letter-spacing: 0.15em;
  margin-bottom: 3.5rem;
}

.section-head {
  max-width: 680px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-head .section-subtitle {
  margin-bottom: 0.7rem;
}

.section-lead {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 2;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
}

/* ===== HEADER / NAV ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.logo-link {
  display: flex;
  align-items: center;
}

.logo-link img {
  height: 38px;
  width: auto;
}

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

nav a {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  font-family: var(--font-en);
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding-bottom: 2px;
  transition: var(--transition);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--text);
  transition: width var(--transition);
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

.nav-contact {
  border: 1px solid var(--text);
  padding: 0.4rem 1.2rem !important;
  transition: all var(--transition) !important;
}

.nav-contact:hover {
  background: var(--text);
  color: var(--white) !important;
}

.nav-contact::after {
  display: none !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text);
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: 70px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0,0,0,0.03) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 2rem;
}

.hero-logo {
  width: 120px;
  margin: 0 auto 2rem;
  animation: fadeInDown 0.8s ease both;
}

.hero-catch {
  font-family: var(--font-en);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-catch span {
  display: block;
  font-size: 0.45em;
  letter-spacing: 0.3em;
  font-weight: 400;
  color: var(--text-light);
  margin-bottom: 0.8rem;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-light);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 2;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.btn-primary {
  display: inline-block;
  background: var(--text);
  color: var(--white);
  padding: 0.9rem 2.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  font-family: var(--font-en);
  border: 1px solid var(--text);
  transition: all var(--transition);
  cursor: pointer;
}

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

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text);
  padding: 0.9rem 2.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  font-family: var(--font-en);
  border: 1px solid var(--text);
  transition: all var(--transition);
  cursor: pointer;
}

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

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  animation: fadeIn 1s ease 1s both;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--text-light));
  animation: scrollLine 1.5s ease-in-out infinite;
}

/* ===== ABOUT (index only) ===== */
.about {
  background: var(--bg-dark);
  color: var(--white);
}

.about .section-subtitle {
  color: rgba(255,255,255,0.5);
}

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

.about-text p {
  color: rgba(255,255,255,0.75);
  margin-bottom: 1.2rem;
  line-height: 2;
}

.about-text .section-title {
  text-align: left;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.about-text .section-subtitle {
  text-align: left;
  margin-bottom: 2rem;
}

.about-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}

.about-logo img {
  width: 220px;
  filter: invert(1);
  opacity: 0.9;
}

/* ===== SERVICES PREVIEW (index) ===== */
.services-preview {
  background: var(--bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  background: var(--white);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--text);
  transition: height var(--transition);
}

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

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

.service-number {
  font-family: var(--font-en);
  font-size: 3rem;
  font-weight: 300;
  color: var(--border);
  line-height: 1;
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
  font-family: var(--font-jp);
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.9;
}

.services-cta {
  text-align: center;
  margin-top: 3rem;
}

/* ===== WORKS PREVIEW (index) ===== */
.works-preview {
  background: var(--bg-soft);
}

.works-grid-featured {
  margin-top: 0;
}

.works-grid-featured .work-card {
  background: var(--white);
}

/* ===== SKILLS/CERTIFICATIONS ===== */
.skills {
  background: #F5F5F3;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.cert-card,
.cert-card-text {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 2rem 1.2rem 1.6rem;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all var(--transition);
}

.cert-card:hover,
.cert-card-text:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.cert-img-wrap {
  width: 100%;
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
}

.cert-logo {
  max-width: 90px;
  max-height: 90px;
  object-fit: contain;
}

.cert-logo-wide {
  max-width: 150px;
  max-height: 60px;
  object-fit: contain;
}

.cert-name {
  font-size: 0.82rem;
  color: var(--text);
  line-height: 1.5;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.cert-issuer {
  font-size: 0.72rem;
  color: var(--text-light);
  font-family: var(--font-en);
  letter-spacing: 0.08em;
}

.cert-icon {
  width: 60px;
  height: 60px;
  flex: 0 0 60px;
  border: 1.5px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.05em;
  margin: 15px 0 calc(1.2rem + 15px);
}

@media (max-width: 900px) {
  .cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }

  .cert-card,
  .cert-card-text {
    padding: 1.5rem 0.75rem 1.25rem;
  }

  .cert-img-wrap {
    height: 80px;
    margin-bottom: 1rem;
  }

  .cert-logo {
    max-width: 80px;
    max-height: 80px;
  }

  .cert-logo-wide {
    max-width: 125px;
    max-height: 52px;
  }

  .cert-name {
    font-size: 0.76rem;
    overflow-wrap: anywhere;
  }

  .cert-issuer {
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    overflow-wrap: anywhere;
  }

  .cert-icon {
    margin: 10px 0 calc(1rem + 10px);
  }
}

/* ===== CTA SECTION ===== */
.cta-section {
  background: var(--text);
  color: var(--white);
  text-align: center;
  padding: 5rem 0;
}

.cta-section .section-title {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
}

.cta-section .btn-secondary {
  color: var(--white);
  border-color: rgba(255,255,255,0.6);
}

.cta-section .btn-secondary:hover {
  background: var(--white);
  color: var(--text);
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.5);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.footer-logo img {
  height: 32px;
  filter: invert(1);
  opacity: 0.8;
  margin-bottom: 0.8rem;
}

.footer-logo p {
  font-size: 0.78rem;
  line-height: 1.8;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-nav a {
  font-size: 0.82rem;
  font-family: var(--font-en);
  letter-spacing: 0.1em;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.75rem;
  font-family: var(--font-en);
  letter-spacing: 0.1em;
}

/* ===== PAGE HEADER (inner pages) ===== */
.page-header {
  padding: 9rem 0 4rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-header .section-title {
  margin-bottom: 0.5rem;
}

/* ===== SERVICES PAGE ===== */
.service-detail {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: start;
}

.service-detail-inner.reverse {
  grid-template-columns: 2fr 1fr;
}

.service-detail-inner.reverse .service-detail-label {
  order: 2;
}

.service-detail-label {
  position: sticky;
  top: 90px;
}

.service-detail-num {
  font-family: var(--font-en);
  font-size: 5rem;
  font-weight: 300;
  color: var(--border);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.service-detail-label h2 {
  font-family: var(--font-jp);
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.service-detail-label .en {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--text-light);
}

.service-detail-body p {
  color: var(--text-light);
  line-height: 2.1;
  margin-bottom: 1.5rem;
}

.service-detail-body h3 {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  letter-spacing: 0.15em;
  color: var(--text);
  border-left: 3px solid var(--text);
  padding-left: 0.8rem;
  margin-bottom: 1rem;
  margin-top: 2rem;
}

.service-feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.service-feature-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-light);
}

.service-feature-list li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--text);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== WORKS (実績カード) ===== */
.works-intro p {
  margin-bottom: 1.2rem;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.work-card {
  border: 1px solid var(--border);
  padding: 1.7rem 1.5rem;
  background: var(--bg);
  min-width: 0;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

.work-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: rgba(26, 26, 26, 0.22);
}

.work-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.7rem;
}

.work-card-label {
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--text-light);
  line-height: 1.5;
  text-transform: uppercase;
}

.work-card-icon {
  width: 2.4rem;
  height: 2.4rem;
  flex: 0 0 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-light);
  font-family: var(--font-en);
  font-size: 0.9rem;
  line-height: 1;
}

.work-card:nth-child(3n + 1) .work-card-icon {
  background: var(--sage);
}

.work-card:nth-child(3n + 2) .work-card-icon {
  background: var(--mist);
}

.work-card:nth-child(3n) .work-card-icon {
  background: var(--clay);
}

.work-card h3,
.work-card h4 {
  font-family: var(--font-jp);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.work-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 1.2rem;
  flex: 1;
}

.work-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.work-tag-list li {
  font-size: 0.75rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border);
  color: var(--text-light);
  background: var(--white);
}

/* ===== CONTACT PAGE ===== */
.contact-section {
  padding: 5rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 5rem;
  align-items: start;
}

.contact-info h3 {
  font-family: var(--font-en);
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.contact-info p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 2;
  margin-bottom: 2rem;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-detail-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-detail-item .label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--text-light);
  font-family: var(--font-en);
  margin-bottom: 0.3rem;
}

.contact-detail-item .value {
  font-size: 0.9rem;
  color: var(--text);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.form-group label {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--text);
  font-family: var(--font-en);
}

.form-group label .required {
  color: #c0392b;
  margin-left: 0.3rem;
  font-size: 0.75rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

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

.form-group textarea {
  resize: vertical;
  min-height: 160px;
  line-height: 1.8;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M6 8L0 0h12z' fill='%231A1A1A'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-note {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.8;
}

.form-submit {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

/* ===== ANIMATIONS ===== */
@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); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }

  .hamburger {
    display: flex;
  }

  nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
  }

  nav.open {
    display: block;
  }

  nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .nav-contact {
    margin-top: 0.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-logo {
    padding: 1.5rem;
  }

  .about-logo img {
    width: 160px;
  }

  .service-detail-inner,
  .service-detail-inner.reverse {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .service-detail-inner.reverse .service-detail-label {
    order: 0;
  }

  .service-detail-label {
    position: static;
  }

  .service-feature-list {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    flex-direction: column;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-catch {
    font-size: 2.2rem;
  }

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