:root {
  --bg: #0e0d0c;
  --surface: #161412;
  --text: #ece7df;
  --muted: #5e5850;
  --subdued: #2e2b28;
  --accent: #c8a96a;
  --border: rgba(236, 231, 223, 0.08);
  --border-strong: rgba(236, 231, 223, 0.14);
  --content: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
p { margin: 0; }

/* ─── Layout ──────────────────────────── */

.page {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 40px;
}

main { padding-top: 64px; }

/* ─── Header ──────────────────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 40px;
  background: rgba(14, 13, 12, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text);
}

.brand-role {
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  transition: color 0.2s;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.header-contact {
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  white-space: nowrap;
  transition: opacity 0.2s;
}

.header-contact:hover {
  opacity: 0.65;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border-strong);
  background: transparent;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: 3px;
}

.nav-toggle span {
  width: 16px;
  height: 1px;
  background: var(--text);
  transition: transform 0.25s ease;
}

body.is-nav-open .nav-toggle span:first-child {
  transform: translateY(3px) rotate(45deg);
}

body.is-nav-open .nav-toggle span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* ─── Hero ────────────────────────────── */

.hero {
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--border-strong);
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-headline {
  margin-bottom: 52px;
  animation: fadeUp 0.7s 0.08s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-kicker {
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

h1 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(3.2rem, 7vw, 6.4rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0;
}

.hero-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  animation: fadeUp 0.7s 0.16s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-lead {
  font-size: 0.97rem;
  line-height: 2;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.primary-link {
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--accent);
  transition: opacity 0.2s;
}

.primary-link:hover {
  opacity: 0.65;
}

.secondary-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.2s;
}

.secondary-link::after {
  content: "↓";
  font-size: 0.85em;
  transition: transform 0.2s;
}

.secondary-link:hover {
  color: var(--text);
}

.secondary-link:hover::after {
  transform: translateY(2px);
}

.hero-aside {
  display: grid;
  gap: 0;
}

.hero-note {
  padding: 22px 0;
  border-top: 1px solid var(--border);
}

.hero-note:last-child {
  border-bottom: 1px solid var(--border);
}

.note-label {
  display: block;
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.note-text {
  font-size: 0.88rem;
  line-height: 1.88;
  color: var(--muted);
}

/* ─── Section base ────────────────────── */

.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

h2 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(2.1rem, 4.5vw, 3.8rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0;
}

h3 {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.45;
  margin: 0;
}

.section-label {
  display: block;
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 0.67rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.section-intro {
  margin-bottom: 52px;
}

/* ─── Statement ───────────────────────── */

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

.statement-body p {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--muted);
}

/* ─── Services ────────────────────────── */

.services-list {
  border-top: 1px solid var(--border);
}

.service-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  padding-left: 0;
  transition: padding-left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-item:hover {
  padding-left: 10px;
}

.service-index {
  font-family: "Space Grotesk", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--subdued);
  padding-top: 3px;
  transition: color 0.3s;
}

.service-item:hover .service-index {
  color: var(--accent);
}

.service-body {
  display: grid;
  gap: 10px;
}

.service-body p {
  font-size: 0.9rem;
  line-height: 1.88;
  color: var(--muted);
}

/* ─── Working Style ───────────────────── */

.style-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
}

.style-card {
  padding: 32px;
  display: grid;
  gap: 14px;
  border-right: 1px solid var(--border);
  transition: background 0.25s;
}

.style-card:last-child {
  border-right: none;
}

.style-card:hover {
  background: var(--surface);
}

.style-card p {
  font-size: 0.88rem;
  line-height: 1.92;
  color: var(--muted);
}

/* ─── Contact ─────────────────────────── */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

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

.contact-block {
  display: grid;
  gap: 16px;
}

.contact-mail {
  display: inline-flex;
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  transition: opacity 0.2s;
}

.contact-mail:hover {
  opacity: 0.65;
}

.contact-note {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ─── Scroll reveal ───────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }

/* ─── Hero entrance ───────────────────── */

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

/* ─── Reduced motion ──────────────────── */

@media (prefers-reduced-motion: reduce) {
  .hero-eyebrow,
  .hero-headline,
  .hero-body {
    animation: none;
  }

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

/* ─── Responsive: 960px ───────────────── */

@media (max-width: 960px) {
  .page { padding: 0 28px; }
  .site-header { padding: 0 28px; }

  .hero-body,
  .statement-body,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .style-card {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .style-card:last-child {
    border-bottom: none;
  }

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

  .hero-note:nth-child(2) {
    padding-left: 24px;
    border-left: 1px solid var(--border);
  }
}

/* ─── Responsive: 760px ───────────────── */

@media (max-width: 760px) {
  .page { padding: 0 20px; }
  .site-header { padding: 0 20px; }

  body.is-nav-open { overflow: hidden; }

  .nav-toggle { display: inline-flex; }

  .nav-panel {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 24px 20px;
    background: var(--bg);
    border-top: 1px solid var(--border-strong);
    opacity: 0;
    visibility: hidden;
    transform: translateX(12px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  body.is-nav-open .nav-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .site-nav a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    width: 100%;
    font-size: 1rem;
    color: var(--text);
  }

  .site-nav a::after { display: none; }

  .header-contact {
    margin-top: 20px;
    font-size: 0.88rem;
  }

  .hero {
    padding: 48px 0 60px;
  }

  .hero-eyebrow {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 40px;
  }

  .hero-aside {
    grid-template-columns: 1fr;
  }

  .hero-note:nth-child(2) {
    padding-left: 0;
    border-left: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .service-item {
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }
}

/* ─── Responsive: 480px ───────────────── */

@media (max-width: 480px) {
  h1 { font-size: clamp(2.7rem, 12vw, 3.6rem); }
  h2 { font-size: clamp(2rem, 9vw, 2.6rem); }

  .hero { padding: 36px 0 52px; }
  .section { padding: 60px 0; }

  .style-card { padding: 24px 20px; }

  .service-item { grid-template-columns: 1fr; gap: 8px; }
}