/* ============================================
   QR Meiro - Design System
   ============================================ */

:root {
  /* ── Color ── */
  --bg:        #0a0a0a;
  --bg-soft:   #111111;
  --bg-card:   #161616;
  --line:      rgba(255,255,255,0.08);
  --line-2:    rgba(255,255,255,0.16);
  --fg:        #ffffff;
  --fg-2:      rgba(255,255,255,0.86);
  --fg-3:      rgba(255,255,255,0.66);
  --fg-4:      rgba(255,255,255,0.44);
  --accent:    #3B82F6;       /* QR迷路のpathカラーをイメージしたブルー */
  --accent-2:  #22C55E;       /* 補助アクセント (グリーン) */
  --grad:      linear-gradient(135deg, #3B82F6 0%, #22C55E 100%);

  /* ── Type ── */
  --ff-display: 'Fraunces', 'Shippori Mincho B1', serif;
  --ff-jp:      'Shippori Mincho B1', 'Noto Serif JP', serif;
  --ff-sans:    'Manrope', 'Noto Sans JP', sans-serif;
  --ff-mono:    'JetBrains Mono', 'Roboto Mono', monospace;

  /* ── Layout ── */
  --max-w:     1440px;
  --gutter:    clamp(20px, 4vw, 56px);
  --section-y: clamp(80px, 12vw, 160px);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  font-feature-settings: "palt" 1;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

/* ============================================
   Typography Utility
   ============================================ */

.display { font-family: var(--ff-display); font-weight: 300; letter-spacing: -0.02em; }
.display-jp { font-family: var(--ff-jp); font-weight: 500; letter-spacing: 0.02em; }
.mono { font-family: var(--ff-mono); letter-spacing: 0.04em; }
.eyebrow {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

/* ============================================
   Container
   ============================================ */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  position: relative;
}

/* ============================================
   Header / Navigation
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 0;
  background: rgba(10,10,10,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  transition: padding 0.3s ease;
}

.site-header.scrolled { padding: 16px 0; }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--ff-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.logo-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><rect x="0" y="0" width="18" height="18" fill="%233B82F6"/><rect x="22" y="0" width="18" height="18" fill="%2322C55E"/><rect x="0" y="22" width="18" height="18" fill="%23FFFFFF"/><rect x="22" y="22" width="18" height="18" fill="%233B82F6"/></svg>');
  background-size: contain;
  background-repeat: no-repeat;
  transform: translateY(3px);
}
.logo-text { letter-spacing: -0.01em; }
.logo em { font-style: italic; color: var(--fg-3); font-weight: 300; font-size: 14px; margin-left: 4px; }

.nav-menu {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-menu a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-2);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s;
}
.nav-menu a:hover,
.nav-menu a.active { color: var(--fg); }
.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
}

.nav-cta {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
  border-radius: 999px;
  transition: all 0.2s;
}
.nav-cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--fg);
}

/* Mobile hamburger */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
}
.menu-toggle span {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--fg);
  transition: 0.3s;
}
.menu-toggle span:nth-child(1) { top: 14px; }
.menu-toggle span:nth-child(2) { top: 20px; }
.menu-toggle span:nth-child(3) { top: 26px; }
.menu-toggle.open span:nth-child(1) { transform: rotate(45deg); top: 20px; }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg); top: 20px; }

@media (max-width: 880px) {
  .nav-menu, .nav-cta { display: none; }
  .menu-toggle { display: block; }
  .site-header.menu-open {
    height: 100vh;
    background: var(--bg);
    backdrop-filter: none;
  }
  .site-header.menu-open .nav-menu {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    padding: 40px var(--gutter);
    gap: 24px;
    background: var(--bg);
  }
  .site-header.menu-open .nav-menu a {
    font-family: var(--ff-display);
    font-size: 32px;
    color: var(--fg);
  }
  .site-header.menu-open .nav-cta {
    display: inline-block;
    position: absolute;
    bottom: 60px;
    left: var(--gutter);
    right: var(--gutter);
    text-align: center;
    padding: 18px;
  }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--fg);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line-2);
}
.btn-ghost:hover {
  border-color: var(--fg);
  background: rgba(255,255,255,0.04);
}
.btn .arrow {
  width: 18px;
  height: 1px;
  background: currentColor;
  position: relative;
  transition: width 0.3s;
}
.btn .arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .arrow { width: 26px; }

/* ============================================
   Footer
   ============================================ */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 80px 0 40px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}
.footer-col h4 {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--fg-2);
  padding: 6px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }

.footer-brand p {
  margin-top: 16px;
  font-size: 13px;
  color: var(--fg-3);
  line-height: 1.7;
  max-width: 360px;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11px;
  color: var(--fg-4);
  letter-spacing: 0.06em;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 0.62fr 1.38fr;
    gap: 32px 24px;
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col a {
    font-size: 13.5px;
    font-feature-settings: "palt" 1;
  }
}

/* ============================================
   Reveal animation
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.3,1),
              transform 0.9s cubic-bezier(.2,.7,.3,1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="100"] { transition-delay: 0.10s; }
.reveal[data-delay="200"] { transition-delay: 0.20s; }
.reveal[data-delay="300"] { transition-delay: 0.30s; }
.reveal[data-delay="400"] { transition-delay: 0.40s; }
.reveal[data-delay="500"] { transition-delay: 0.50s; }

/* split chars typed reveal */
.split .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em);
  transition: opacity 0.7s cubic-bezier(.2,.7,.3,1),
              transform 0.7s cubic-bezier(.2,.7,.3,1);
}
.split.in .char { opacity: 1; transform: translateY(0); }

/* ============================================
   Page transition (page intro)
   ============================================ */

.page-intro {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 999;
  pointer-events: none;
  transition: opacity 0.9s ease, visibility 0.9s ease;
}
body.loaded .page-intro {
  opacity: 0;
  visibility: hidden;
}
.page-intro::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--accent) 100%);
  opacity: 0;
  animation: scan 1.2s ease-out;
}
@keyframes scan {
  0% { opacity: 0; transform: translateY(-100%); }
  40% { opacity: 0.04; }
  100% { opacity: 0; transform: translateY(100%); }
}

/* ============================================
   CTA Big
   ============================================ */

.cta-big {
  border-top: 1px solid var(--line);
  text-align: center;
  padding: 140px var(--gutter);
  position: relative;
  overflow: hidden;
}
.cta-big::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255,61,110,0.10), transparent 60%);
  pointer-events: none;
}
.cta-big h2 {
  font-family: var(--ff-display);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(48px, 9vw, 128px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  position: relative;
}
.cta-big p {
  font-family: var(--ff-jp);
  color: var(--fg-2);
  max-width: 560px;
  margin: 0 auto 40px;
  font-size: 16px;
  line-height: 2;
  position: relative;
}
.cta-big .btn { position: relative; }