:root {
  --bg: #0a0a0b;
  --surface: #111113;
  --border: #1e1e22;
  --border-hover: #2a2a30;
  --text: #e8e8ec;
  --text-muted: #b0b0bc;
  --accent: #00d4aa;
  --accent-dim: rgb(0 212 170 / 8%);
  --accent-glow: rgb(0 212 170 / 15%);
  --mono: 'DM Mono', monospace;
  --sans: 'Sora', 'Noto Sans JP', sans-serif;
  --jp: 'Noto Sans JP', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--border) var(--bg);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* --- Grain overlay --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px;
}

/* --- Nav --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgb(10 10 11 / 80%);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.3s;
}

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

.lang-toggle {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
  letter-spacing: 0.05em;
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.hero-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero h1 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 780px;
  line-height: 1.8;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-line {
  position: absolute;
  bottom: 4rem;
  left: 2rem;
  width: 40px;
  height: 1px;
  background: var(--accent);
  opacity: 0;
  animation: expandLine 1s ease forwards 1s;
}

/* --- Sections --- */
section {
  padding: 6rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

/* --- Services --- */
.services-grid {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.service-card {
  background: var(--surface);
  padding: 2.5rem 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 2rem;
  transition: background 0.4s;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.service-card:hover {
  background: var(--accent-dim);
}

.service-name {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
}

.service-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.service-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.service-arrow {
  font-family: var(--mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: all 0.3s;
  padding-top: 0.2rem;
}

.service-card:hover .service-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* --- About --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 2;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 1rem;
}

.stat {
  background: var(--surface);
  padding: 1.8rem 1.5rem;
  text-align: center;
}

.stat-value {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.stat-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.contact-link {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.3s;
}

.contact-link:hover {
  opacity: 0.7;
}

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

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.form-field input,
.form-field textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 300;
  outline: none;
  transition: border-color 0.3s;
  resize: vertical;
}

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

.form-field textarea {
  min-height: 120px;
}

.submit-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.85rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
  align-self: flex-start;
}

.submit-btn:hover {
  background: var(--accent);
  color: var(--bg);
}

/* --- Footer --- */
footer {
  padding: 3rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.3s;
}

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

/* --- Animations --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes expandLine {
  from {
    opacity: 0;
    width: 0;
  }

  to {
    opacity: 0.4;
    width: 40px;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  nav {
    padding: 1rem 1.25rem;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 7rem 1.25rem 3rem;
  }

  section {
    padding: 4rem 1.25rem;
  }

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

  .service-arrow {
    display: none;
  }

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

  .about-stats {
    grid-template-columns: 1fr;
  }

  footer {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}