/* ─── Reset & Base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --bg-2: #f0f4fb;
  --bg-3: #e4ecf7;
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --accent: #2563eb;
  --accent-dim: rgba(37, 99, 235, 0.1);
  --border: rgba(15, 23, 42, 0.1);
  --radius: 4px;
  --max-w: 1160px;
  --nav-h: 72px;
  --font-en: 'Inter', sans-serif;
  --font-ja: 'Noto Sans JP', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ja);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ─── Utilities ─── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

.label {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.heading {
  font-family: var(--font-ja);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 48px;
}

.section {
  padding: 120px 0;
}

.btn {
  display: inline-block;
  padding: 14px 36px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.25s, color 0.25s;
  background: transparent;
}

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

.btn--full { width: 100%; text-align: center; }

/* ─── Reveal Animation ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  transition: background 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav__logo {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: 40px;
}

.nav__link {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 40px 80px;
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero__eyebrow {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

.hero__title {
  font-size: clamp(52px, 8vw, 104px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}

.hero__line {
  display: block;
}

.hero__sub {
  font-size: 15px;
  line-height: 2;
  color: var(--text-muted);
  margin-bottom: 48px;
  max-width: 440px;
}

/* Dot grid */
.hero__dots {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(37, 99, 235, 0.1) 1px, transparent 1px);
  background-size: 36px 36px;
}

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

.hero__link {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  transition: color 0.2s;
}

.hero__link:hover { color: var(--accent); }

/* Orb decorations */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
}

.hero__orb--1 {
  width: 600px;
  height: 600px;
  background: var(--accent);
  right: -100px;
  top: -100px;
}

.hero__orb--2 {
  width: 400px;
  height: 400px;
  background: #60a5fa;
  right: 200px;
  bottom: 0;
}

.hero__scroll {
  position: absolute;
  bottom: 48px;
  left: 40px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 2;
}

.hero__scroll span {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.hero__scroll-line {
  width: 48px;
  height: 1px;
  background: var(--text-dim);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  animation: scrollLine 2s 1s infinite;
}

@keyframes scrollLine {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

/* ─── About ─── */
.about {
  border-top: 1px solid var(--border);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}

.about__left {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.about__image {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  margin-bottom: 40px;
  border: 1px solid var(--border);
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(15%) brightness(0.95);
  transition: transform 0.6s ease, filter 0.4s ease;
}

.about__image:hover img {
  transform: scale(1.03);
  filter: grayscale(0%) brightness(1);
}

.about__image-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 8px 16px;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.about__lead {
  font-size: 20px;
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: 28px;
  color: var(--text);
}

.about__body {
  font-size: 14px;
  line-height: 2;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.about__stats {
  display: flex;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.stat__num {
  display: block;
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat__label {
  font-size: 12px;
  color: var(--text-muted);
}

/* ─── Services ─── */
.services {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.service-card {
  background: var(--bg-2);
  padding: 48px 40px;
  transition: background 0.3s;
}

.service-card:hover {
  background: var(--bg-3);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 24px;
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__num {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 28px;
}

.service-card__title {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 300;
  margin-bottom: 4px;
}

.service-card__sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.service-card__body {
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.service-card__list li {
  font-size: 12px;
  color: var(--text-dim);
  padding-left: 16px;
  position: relative;
}

.service-card__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 10px;
}

/* ─── Process ─── */
.process__lead {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 64px;
  margin-top: -24px;
}

.process__steps {
  display: flex;
  flex-direction: column;
}

.process__step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.process__step:first-child {
  border-top: 1px solid var(--border);
}

.process__step-num {
  font-family: var(--font-en);
  font-size: 40px;
  font-weight: 300;
  color: var(--text-dim);
  line-height: 1;
  padding-top: 4px;
}

.process__step-content h3 {
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 12px;
}

.process__step-content p {
  font-size: 14px;
  line-height: 2;
  color: var(--text-muted);
}

/* ─── Philosophy ─── */
.philosophy {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 140px 0;
}

.philosophy__quote {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  border: none;
  position: relative;
}

.philosophy__quote::before {
  content: '\201C';
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 120px;
  font-family: Georgia, serif;
  color: var(--accent);
  opacity: 0.15;
  line-height: 1;
  pointer-events: none;
}

.philosophy__quote p {
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 300;
  line-height: 1.9;
  letter-spacing: 0.02em;
}

.philosophy__quote em {
  font-style: normal;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* ─── Contact ─── */
.contact__lead {
  font-size: 15px;
  line-height: 2;
  color: var(--text-muted);
  margin-bottom: 56px;
  margin-top: -24px;
}

.contact__form {
  max-width: 680px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.form-group label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.req { color: var(--accent); }

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 16px;
  font-family: var(--font-ja);
  font-size: 14px;
  outline: none;
  border-radius: var(--radius);
  transition: border-color 0.2s;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }

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

.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group textarea { resize: vertical; min-height: 140px; }

.form__note {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* ─── Footer ─── */
.footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 40px;
}

.footer__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 56px;
}

.footer__logo {
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.footer__tagline {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.footer__nav {
  display: flex;
  gap: 32px;
}

.footer__nav a {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer__nav a:hover { color: var(--text); }

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.footer__copy {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .nav { padding: 0 24px; }

  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav__links.open { max-height: 300px; }

  .nav__link {
    display: block;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
  }

  .nav__toggle { display: flex; }

  .hero { padding: calc(var(--nav-h) + 24px) 24px 80px; }

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

  .about__left { position: static; }

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

  .section { padding: 80px 0; }
  .container { padding: 0 24px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }

  .process__step {
    grid-template-columns: 56px 1fr;
    gap: 24px;
    padding: 36px 0;
  }

  .process__step-num { font-size: 28px; }

  .about__stats { gap: 32px; }

  .footer__inner { flex-direction: column; gap: 32px; }
}

@media (max-width: 600px) {
  .hero__actions { flex-direction: column; align-items: flex-start; gap: 20px; }
  .container { padding: 0 20px; }

  .section { padding: 64px 0; }
  .philosophy { padding: 80px 0; }

  .hero { padding: calc(var(--nav-h) + 16px) 20px 64px; }
  .hero__title { font-size: clamp(40px, 11vw, 52px); }
  .hero__sub { font-size: 14px; }
  .hero__scroll { display: none; }

  .heading { font-size: 28px; margin-bottom: 32px; }

  .about__stats {
    flex-wrap: wrap;
    gap: 24px;
  }

  .stat { min-width: calc(50% - 12px); }

  .service-card { padding: 36px 24px; }

  .process__step {
    grid-template-columns: 44px 1fr;
    gap: 16px;
    padding: 28px 0;
  }

  .process__step-num { font-size: 22px; }

  .contact__form { max-width: 100%; }

  .footer { padding: 48px 0 32px; }
  .footer__inner { gap: 24px; }
  .footer__nav { flex-wrap: wrap; gap: 16px 20px; }
}