/* ============================================
   READ JAPAN - main stylesheet
   inspired by minimalist editorial design
============================================ */

:root {
  --bg: #0a0a0a;
  --bg-soft: #111111;
  --fg: #f4f4f4;
  --fg-mute: #888888;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #ffffff;

  --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-jp: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-serif: 'Cormorant Garamond', 'Times New Roman', serif;

  --max: 1440px;
  --pad: clamp(20px, 4vw, 60px);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-jp);
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
em { font-style: italic; font-family: var(--font-serif); font-weight: 500; }


/* ============ image placeholder ============ */
.image-placeholder {
  width: 100%;
  aspect-ratio: 4 / 5;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 12px, transparent 12px 24px);
  border: 1px solid var(--border);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-mute);
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
}
.image-placeholder::before {
  content: attr(data-label);
}
.image-placeholder.hero-image { aspect-ratio: 16 / 9; height: 100%; }


/* ============ real images ============ */
.hero-bg img.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.service-image img,
.company-image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
  display: block;
  border: 1px solid var(--border);
}


/* ============ HEADER ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 24px var(--pad);
  display: flex;
  align-items: center;
  background: linear-gradient(to bottom, rgba(10,10,10,0.85), rgba(10,10,10,0));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.logo-text {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.25em;
}

.global-nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
}
.global-nav a {
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  position: relative;
  padding: 4px 0;
  transition: opacity .3s;
}
.global-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  height: 1px; width: 0;
  background: var(--fg);
  transition: width .4s ease;
}
.global-nav a:hover::after { width: 100%; }

.world-clock {
  display: flex;
  gap: 18px;
}
.clock {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  font-family: var(--font-en);
  line-height: 1.1;
}
.clock .city {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--fg-mute);
}
.clock .time {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 28px;
  height: 22px;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 1px;
  background: var(--fg);
}


/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 var(--pad);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg .image-placeholder {
  width: 100%;
  height: 100%;
  border: none;
  aspect-ratio: auto;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(10,10,10,0.85) 0%, rgba(10,10,10,0.45) 45%, rgba(10,10,10,0.1) 100%),
    linear-gradient(to bottom, rgba(10,10,10,0) 60%, rgba(10,10,10,0.6) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}
.hero-tag {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--fg-mute);
  margin-bottom: 32px;
}
.hero-title {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(2.4rem, 7vw, 6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}
.hero-title .line {
  display: block;
  overflow: hidden;
}
.hero-title em {
  font-size: 1.05em;
  letter-spacing: 0;
}
.hero-sub {
  font-family: var(--font-jp);
  font-size: clamp(0.95rem, 1.4vw, 1.2rem);
  letter-spacing: 0.15em;
  color: var(--fg-mute);
  font-weight: 400;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: var(--pad);
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--fg-mute);
  z-index: 1;
}
.scroll-line {
  width: 60px;
  height: 1px;
  background: var(--fg-mute);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  left: -60px; top: 0;
  width: 60px; height: 100%;
  background: var(--fg);
  animation: scrollLine 2.4s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: translateX(0); }
  100% { transform: translateX(120px); }
}


/* ============ SECTION ============ */
.section {
  padding: clamp(80px, 12vw, 160px) var(--pad);
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
}
.section-head {
  margin-bottom: clamp(48px, 6vw, 80px);
}
.section-head.center { text-align: center; }
.section-num {
  font-family: var(--font-en);
  font-size: 0.78rem;
  letter-spacing: 0.3em;
  color: var(--fg-mute);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(2rem, 5vw, 3.6rem);
  letter-spacing: 0.05em;
  line-height: 1.1;
}
.section-jp {
  margin-top: 16px;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--fg-mute);
}


/* ============ PHILOSOPHY ============ */
.philosophy-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
.philosophy .lead {
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: clamp(1.4rem, 2.8vw, 2.4rem);
  line-height: 1.7;
  letter-spacing: 0.08em;
}
.philosophy-text p {
  margin-bottom: 1.6em;
  color: rgba(244,244,244,0.85);
}
.philosophy-text strong {
  font-weight: 500;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
}


/* ============ SERVICE ============ */
.service-list {
  display: flex;
  flex-direction: column;
  gap: clamp(80px, 10vw, 140px);
}
.service-item {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: center;
}
.service-item.reverse { grid-template-columns: 6fr 5fr; }
.service-item.reverse .service-image { order: 2; }
.service-item.reverse .service-text { order: 1; }

.service-tag {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--fg-mute);
  margin-bottom: 20px;
}
.service-title {
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 28px;
}
.service-title span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-jp);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--fg-mute);
}
.service-text p {
  margin-bottom: 1.4em;
  color: rgba(244,244,244,0.85);
}
.service-text strong {
  font-weight: 500;
  color: var(--fg);
}


/* ============ VISION ============ */
.vision { background: var(--bg-soft); max-width: none; margin: 0; }
.vision .section-head, .vision .vision-grid, .vision .vision-statement {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.vision-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(40px, 5vw, 72px) clamp(40px, 6vw, 100px);
}
.vision-block {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}
.vision-block h3 {
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.vision-block p {
  color: rgba(244,244,244,0.78);
  font-size: 0.95rem;
}
.vision-block strong { font-weight: 500; color: var(--fg); }

.vision-statement {
  margin-top: clamp(60px, 8vw, 120px);
  text-align: center;
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  letter-spacing: 0.15em;
  line-height: 2;
  color: var(--fg-mute);
}
.vision-statement em {
  display: inline-block;
  margin-top: 12px;
  color: var(--fg);
  font-size: 1.3em;
}


/* ============ COMPANY ============ */
.company-wrap {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
.company-info {
  display: flex;
  flex-direction: column;
}
.company-info .row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.company-info .row:first-child { border-top: 1px solid var(--border); }
.company-info dt {
  font-family: var(--font-en);
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  color: var(--fg-mute);
  padding-top: 4px;
}
.company-info dd { font-size: 0.95rem; line-height: 1.9; }
.company-info .muted { color: var(--fg-mute); font-size: 0.82rem; }


/* ============ CONTACT ============ */
.contact-body { text-align: center; }
.contact-lead {
  margin-bottom: 48px;
  color: rgba(244,244,244,0.8);
  font-size: 0.95rem;
}
.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 20px 48px;
  border: 1px solid var(--fg);
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  font-weight: 500;
  position: relative;
  overflow: hidden;
  transition: color .35s;
  z-index: 1;
}
.contact-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--fg);
  transform: translateX(-101%);
  transition: transform .4s ease;
  z-index: -1;
}
.contact-button:hover { color: var(--bg); }
.contact-button:hover::before { transform: translateX(0); }
.contact-button svg { transition: transform .35s; }
.contact-button:hover svg { transform: translateX(6px); }


/* ============ FOOTER ============ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 60px var(--pad) 32px;
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: start;
}
.footer-brand .logo-text { font-size: 1.2rem; margin-bottom: 12px; }
.footer-copy { color: var(--fg-mute); font-size: 0.85rem; letter-spacing: 0.1em; }
.footer-nav ul { list-style: none; display: flex; gap: 24px; }
.footer-nav a {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--fg-mute);
  transition: color .3s;
}
.footer-nav a:hover { color: var(--fg); }
.copyright {
  grid-column: 1 / -1;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--fg-mute);
}


/* ============ FADE-IN ANIMATION ============ */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s ease, transform 1s ease;
}
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .global-nav, .world-clock { display: none; }
  .menu-toggle { display: flex; }

  .philosophy-body,
  .company-wrap { grid-template-columns: 1fr; }

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

  .service-item,
  .service-item.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .service-item.reverse .service-image { order: 0; }
  .service-item.reverse .service-text { order: 0; }

  .company-info .row { grid-template-columns: 1fr; gap: 8px; }

  .footer-inner { grid-template-columns: 1fr; }

  .hero-title { font-size: clamp(2rem, 9vw, 3.6rem); }
}

@media (max-width: 560px) {
  .header-inner { gap: 16px; }
  .hero-scroll { display: none; }
}


/* ============ MOBILE NAV (overlay) ============ */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s;
}
.mobile-nav-overlay.is-open { opacity: 1; pointer-events: auto; }
.mobile-nav-overlay ul { list-style: none; text-align: center; }
.mobile-nav-overlay li { margin: 24px 0; }
.mobile-nav-overlay a {
  font-family: var(--font-en);
  font-size: 1.6rem;
  letter-spacing: 0.2em;
}