/* ============================================================
   W ASSETS — Monochrome Elegant Style
   ============================================================ */

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

:root {
  --black:   #0a0a0a;
  --dark:    #111111;
  --mid:     #1c1c1c;
  --border:  #2a2a2a;
  --muted:   #555555;
  --silver:  #888888;
  --light:   #cccccc;
  --white:   #f5f5f5;
  --accent:  #d4d4d4;

  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-ja: 'Noto Serif JP', serif;
  --font-sans:     'Noto Sans JP', sans-serif;

  --header-h: 72px;
  --section-gap: 120px;
  --container: 1120px;
  --radius: 2px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background: var(--black);
  color: var(--light);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--border); }

/* ---------- Container ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

/* ---------- Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Section Common ---------- */
.section {
  padding: var(--section-gap) 0;
}

.section-label {
  font-family: var(--font-serif-en);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-serif-ja);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 64px;
  position: relative;
  padding-bottom: 24px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 1px;
  background: var(--silver);
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-block;
  padding: 14px 40px;
  border: 1px solid var(--light);
  color: var(--white);
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  transition: background var(--transition), color var(--transition);
  border-radius: var(--radius);
}
.btn-primary:hover {
  background: var(--white);
  color: var(--black);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background var(--transition), border-bottom var(--transition);
}
.site-header.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.logo-en {
  font-family: var(--font-serif-en);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--white);
  line-height: 1;
}
.logo-ja {
  font-family: var(--font-serif-ja);
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--silver);
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-family: var(--font-serif-en);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--white);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }
.nav-links .nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--border);
  color: var(--light);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.nav-links .nav-cta::after { display: none; }
.nav-links .nav-cta:hover {
  border-color: var(--white);
  color: var(--black);
  background: var(--white);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--light);
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: rgba(10,10,10,0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 40px;
  gap: 20px;
  z-index: 99;
  transform: translateY(-110%);
  transition: transform var(--transition);
}
.mobile-nav.open { transform: translateY(0); }
.mob-link {
  font-family: var(--font-serif-en);
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--light);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 50%, #111 100%);
}

/* Geometric pattern overlay */
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 79px,
      rgba(255,255,255,0.025) 80px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 79px,
      rgba(255,255,255,0.025) 80px
    );
}

/* Large decorative letter */
.hero-bg::after {
  content: 'W';
  position: absolute;
  right: -2%;
  bottom: -10%;
  font-family: var(--font-serif-en);
  font-size: clamp(300px, 40vw, 600px);
  font-weight: 500;
  color: rgba(255,255,255,0.025);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10,10,10,0.9) 40%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  padding-top: var(--header-h);
  width: 100%;
}

.hero-sub {
  font-family: var(--font-serif-en);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 24px;
  transition-delay: 0.1s;
}

.hero-title {
  font-family: var(--font-serif-ja);
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 28px;
  transition-delay: 0.2s;
}
.hero-title em {
  font-style: normal;
  color: var(--accent);
  display: block;
}

.hero-desc {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 2;
  color: var(--silver);
  margin-bottom: 48px;
  transition-delay: 0.3s;
}

.hero-content .btn-primary {
  transition-delay: 0.4s;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  right: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 2;
}
.hero-scroll span {
  font-family: var(--font-serif-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(0.6); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  background: var(--dark);
}

.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--light);
  margin-bottom: 20px;
}
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--white); font-weight: 400; }

.about-numbers {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  padding: 48px 40px;
}

.num-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 28px 0;
}

.num-divider {
  height: 1px;
  background: var(--border);
}

.num {
  font-family: var(--font-serif-en);
  font-size: 3rem;
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.05em;
  line-height: 1;
}
.num-unit {
  font-size: 1.8rem;
}
.num-label {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
}

/* ============================================================
   BUSINESS
   ============================================================ */
.business {
  background: var(--black);
}

.biz-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  max-width: 860px;
  margin: 0 auto;
}

.biz-card {
  background: var(--mid);
  padding: 48px 36px;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}
.biz-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--white);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.biz-card:hover { background: #202020; }
.biz-card:hover::before { transform: scaleX(1); }

.biz-num {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-bottom: 28px;
}

.biz-icon {
  width: 48px;
  height: 48px;
  color: var(--silver);
  margin-bottom: 24px;
  transition: color var(--transition);
}
.biz-card:hover .biz-icon { color: var(--white); }

.biz-title {
  font-family: var(--font-serif-ja);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 16px;
}

.biz-desc {
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--silver);
}

/* ============================================================
   STRENGTH
   ============================================================ */
.strength {
  background: var(--dark);
}

.str-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.str-item {
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: 40px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.str-item:first-child { border-top: 1px solid var(--border); }

.str-line {
  width: 4px;
  height: 100%;
  min-height: 60px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.str-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0;
  background: var(--white);
  transition: height 0.6s ease;
}
.str-item.visible .str-line::after { height: 100%; }

.str-content h3 {
  font-family: var(--font-serif-ja);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--white);
  margin-bottom: 12px;
}

.str-content p {
  font-size: 0.9rem;
  line-height: 2;
  color: var(--silver);
}

/* ============================================================
   COMPANY
   ============================================================ */
.company {
  background: var(--black);
}

.company-table-wrap {
  overflow-x: auto;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.company-table th,
.company-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  line-height: 1.8;
}

.company-table th {
  width: 180px;
  font-family: var(--font-serif-en);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
  white-space: nowrap;
}

.company-table td {
  color: var(--light);
}

.company-table tr:first-child th,
.company-table tr:first-child td {
  border-top: 1px solid var(--border);
}

.td-en {
  font-family: var(--font-serif-en);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--silver);
}

.company-table a {
  color: var(--light);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition);
}
.company-table a:hover {
  color: var(--white);
  border-color: var(--white);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  background: var(--dark);
}

.contact-lead {
  font-size: 0.95rem;
  color: var(--silver);
  margin-bottom: 40px;
  line-height: 2;
}

/* ============================================================
   PROPERTIES
   ============================================================ */
.properties {
  background: var(--dark);
}

.prop-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.prop-card {
  background: var(--mid);
  overflow: hidden;
  transition: background var(--transition);
}
.prop-card:hover { background: #202020; }

.prop-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #1a1a1a;
}

.prop-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(30%);
  transition: transform 0.6s ease, filter 0.6s ease;
}
.prop-card:hover .prop-img {
  transform: scale(1.04);
  filter: grayscale(0%);
}

.prop-img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #161616;
}
.prop-img-inner {
  color: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.prop-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(10,10,10,0.8);
  border: 1px solid var(--border);
  color: var(--silver);
  font-family: var(--font-serif-en);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 4px 10px;
  backdrop-filter: blur(4px);
}

.prop-body {
  padding: 32px 36px 36px;
}

.prop-location {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

.prop-name {
  font-family: var(--font-serif-ja);
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--white);
  margin-bottom: 14px;
  line-height: 1.4;
}
.prop-name-sub {
  font-size: 0.85rem;
  color: var(--silver);
  font-weight: 300;
}

.prop-desc {
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--silver);
  margin-bottom: 20px;
}

.prop-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag {
  font-family: var(--font-serif-en);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 3px 10px;
}

.prop-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}
.prop-link:hover {
  color: var(--white);
  border-color: var(--white);
}

/* Contact email */
.contact-email {
  margin-top: 8px;
}
.email-link {
  font-family: var(--font-serif-en);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--white);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  transition: color var(--transition), border-color var(--transition);
}
.email-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--black);
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-nav {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  align-items: center;
}
.footer-nav a {
  font-family: var(--font-serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--light); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  gap: 20px;
  flex-wrap: wrap;
}

.copyright {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.footer-domain {
  font-family: var(--font-serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  :root { --section-gap: 80px; }

  .container { padding: 0 24px; }
  .header-inner { padding: 0 24px; }
  .hero-content { padding: 0 24px; padding-top: var(--header-h); }

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .biz-grid { grid-template-columns: 1fr; gap: 2px; }
  .prop-grid { grid-template-columns: 1fr; gap: 2px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }

  .hero-title { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero-scroll { right: 24px; bottom: 24px; }

  .company-table th { width: 120px; }

  .footer-inner { flex-direction: column; gap: 24px; }
  .footer-nav { gap: 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 600px) {
  :root { --section-gap: 64px; }
  .container { padding: 0 20px; }
  .hero-content { padding: 0 20px; padding-top: var(--header-h); }
  .mobile-nav { padding: 24px 20px; }

  .about-numbers { padding: 32px 24px; }
  .biz-card { padding: 36px 24px; }
  .str-item { gap: 24px; padding: 36px 0; }
  .company-table th, .company-table td { padding: 16px; }

  .br-pc { display: none; }
}