/* kamuturu - handcrafted landing site
   Design: dark glass + neon gradient, accessible + responsive.
   Motion respects prefers-reduced-motion.
*/

:root{
  --bg:#070A12;
  --bg2:#0B1022;
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.68);
  --muted2:rgba(255,255,255,.55);
  --surface:rgba(255,255,255,.06);
  --surface2:rgba(255,255,255,.10);
  --border:rgba(255,255,255,.12);
  --shadow: 0 14px 48px rgba(0,0,0,.45);
  --accentA:#22D3EE;
  --accentB:#A78BFA;
  --accentC:#34D399;
  --danger:#fb7185;
  --radius: 18px;
  --radius2: 28px;
  --container: 1120px;
  --navH: 76px;
  --focus: 0 0 0 3px rgba(34,211,238,.35), 0 0 0 6px rgba(167,139,250,.22);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(34,211,238,.16), transparent 60%),
              radial-gradient(1000px 700px at 70% 0%, rgba(167,139,250,.14), transparent 55%),
              radial-gradient(900px 600px at 60% 120%, rgba(52,211,153,.11), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  overflow-x:hidden;
}

img{max-width:100%; height:auto}
a{color:inherit}
p{line-height:1.8; margin: 0}
small{color:var(--muted2)}

::selection{background: rgba(34,211,238,.24)}

.skip-link{
  position:absolute;
  left:-999px;
  top: 8px;
  background: #fff;
  color:#000;
  padding: 10px 12px;
  border-radius: 10px;
  z-index: 9999;
}
.skip-link:focus{left:12px; box-shadow: var(--focus)}

.container{
  width:min(var(--container), calc(100% - 48px));
  margin-inline:auto;
}

/* Generic content (pages / posts) */
.content{
  color: var(--muted);
  line-height: 1.9;
  font-size: 14px;
}
.content > *{max-width: 78ch}
.content > * + *{margin-top: 14px}
.content h1,.content h2,.content h3,.content h4{color: var(--text); margin: 0 0 6px}
.content a{color: var(--text); text-decoration: underline; text-decoration-color: rgba(34,211,238,.45); text-underline-offset: 3px}
.content ul,.content ol{padding-left: 18px; color: var(--muted)}
.content li{margin: 6px 0}
.content blockquote{
  margin: 0;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
}
.content code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  padding: 2px 6px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.22);
  color: var(--text);
}

.site-header{
  position:sticky;
  top:0;
  z-index: 200;
  height: var(--navH);
  display:flex;
  align-items:center;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(7,10,18,.55);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-header.scrolled{
  background: rgba(7,10,18,.78);
  border-bottom-color: rgba(255,255,255,.12);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  text-decoration:none;
}
.brand img{
  width: 38px;
  height: 38px;
  border-radius: 12px;
}
.brand .wordmark{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand strong{
  font-size: 15px;
  letter-spacing: .2px;
}
.brand span{
  font-size: 12px;
  color: var(--muted);
}

.nav-links{
  display:flex;
  gap: 18px;
  align-items:center;
}
.nav-links a{
  text-decoration:none;
  color: var(--muted);
  font-size: 14px;
  padding: 10px 10px;
  border-radius: 12px;
  transition: background .2s ease, color .2s ease;
}
.nav-links a:hover{
  background: rgba(255,255,255,.06);
  color: var(--text);
}
.nav-links a[aria-current="page"]{
  color: var(--text);
  background: rgba(255,255,255,.08);
}

.nav-cta{
  display:flex;
  gap: 10px;
  align-items:center;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
  text-decoration:none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .2px;
  box-shadow: 0 0 0 rgba(0,0,0,0);
  transform: translateZ(0);
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.09);
  border-color: rgba(255,255,255,.18);
}
.btn:focus-visible{
  outline:none;
  box-shadow: var(--focus);
}

.btn-primary{
  border: none;
  background: linear-gradient(120deg, rgba(34,211,238,.95), rgba(167,139,250,.95), rgba(52,211,153,.95));
  color: #06101a;
}
.btn-primary:hover{
  transform: translateY(-1px) scale(1.01);
}
.btn-ghost{
  background: transparent;
  border-color: rgba(255,255,255,.16);
}

.icon{
  width: 18px;
  height: 18px;
  display:inline-block;
}

.hamburger{
  display:none;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
}
.hamburger:focus-visible{outline:none; box-shadow: var(--focus)}
.hamburger svg{width: 22px; height:22px}

.progress{
  position:absolute;
  left:0;
  bottom:0;
  height: 2px;
  background: linear-gradient(90deg, var(--accentA), var(--accentB), var(--accentC));
  width: 0%;
  opacity: .9;
}

.hero{
  position:relative;
  padding: 70px 0 36px;
  min-height: calc(100vh - var(--navH));
  min-height: calc(100svh - var(--navH));
  min-height: calc(100dvh - var(--navH));
  display:flex;
  align-items:center;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:-1;
  overflow:hidden;
}
.hero-bg canvas{
  width:100%;
  height:100%;
  display:block;
}
.grain{
  position:absolute;
  inset:0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  opacity: .35;
  pointer-events:none;
}
.glow{
  position:absolute;
  width: 900px;
  height: 900px;
  left: 50%;
  top: 52%;
  transform: translate(-50%,-50%);
  background: radial-gradient(circle at 30% 30%, rgba(34,211,238,.22), transparent 45%),
              radial-gradient(circle at 70% 25%, rgba(167,139,250,.18), transparent 42%),
              radial-gradient(circle at 60% 70%, rgba(52,211,153,.14), transparent 46%);
  filter: blur(30px);
  opacity: .95;
  pointer-events:none;
}

.hero-inner{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 28px;
  align-items:center;
}

.badge{
  display:inline-flex;
  gap:10px;
  align-items:center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.05);
  color: var(--muted);
  font-size: 13px;
  width: fit-content;
  margin-bottom: 14px;
}

.hero-title{
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: -1.1px;
  margin: 0 0 12px;
}
.grad{
  background: linear-gradient(120deg, var(--accentA), var(--accentB), var(--accentC));
  -webkit-background-clip:text;
  background-clip:text;
  color: transparent;
}

.hero-sub{
  font-size: clamp(14px, 1.25vw, 18px);
  color: var(--muted);
  margin-bottom: 18px;
}

.hero-cta{
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
  margin-bottom: 26px;
}

.hero-points{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.pill{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: 16px;
  padding: 12px;
  display:flex;
  flex-direction:column;
  gap: 6px;
}
.pill strong{font-size: 14px}
.pill span{font-size: 12px; color: var(--muted2)}

.hero-card{
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  box-shadow: var(--shadow);
  padding: 18px;
  position:relative;
  overflow:hidden;
}
.hero-card::before{
  content:"";
  position:absolute;
  inset:-2px;
  background: radial-gradient(800px 250px at 15% 20%, rgba(34,211,238,.22), transparent 60%),
              radial-gradient(700px 220px at 80% 35%, rgba(167,139,250,.18), transparent 60%),
              radial-gradient(700px 220px at 55% 80%, rgba(52,211,153,.14), transparent 60%);
  opacity: .9;
  z-index:-1;
}
.hero-card .k{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.hero-card .k img{width: 46px; height:46px; border-radius: 16px}
.hero-card h2{
  margin: 0;
  font-size: 16px;
}
.hero-card p{
  color: var(--muted);
  font-size: 13px;
}
.hero-card ul{
  padding-left: 18px;
  margin: 12px 0 0;
  color: var(--muted2);
  font-size: 13px;
}
.hero-card li{margin: 6px 0}

.section{
  padding: 72px 0;
}
.section-header{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.section-header h2{
  margin:0;
  font-size: clamp(24px, 3.1vw, 36px);
  letter-spacing: -0.6px;
}
.section-header p{
  margin:0;
  color: var(--muted);
  max-width: 58ch;
}

.grid{
  display:grid;
  gap: 14px;
}

.cards-3{
  grid-template-columns: repeat(3, 1fr);
}
.cards-2{
  grid-template-columns: repeat(2, 1fr);
}

.card{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 18px;
  position:relative;
  overflow:hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.card:hover{
  transform: translateY(-2px);
  border-color: rgba(255,255,255,.18);
  background: rgba(255,255,255,.07);
}

.card .top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.tag{
  font-size: 12px;
  color: var(--muted);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: 999px;
  padding: 6px 10px;
}
.card h3{
  margin: 2px 0 8px;
  font-size: 16px;
}
.card p{
  color: var(--muted);
  font-size: 13px;
}
.list{
  margin-top: 12px;
  display:grid;
  gap: 8px;
}
.list .li{
  display:flex;
  gap: 10px;
  align-items:flex-start;
  color: var(--muted2);
  font-size: 13px;
}
.bullet{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accentA), var(--accentB), var(--accentC));
  margin-top: 5px;
  flex: 0 0 auto;
}

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items:stretch;
}
.panel{
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 22px;
  position:relative;
  z-index:0;
  isolation:isolate;
  overflow:hidden;
}
.panel::before{
  content:"";
  position:absolute;
  inset:-2px;
  background: radial-gradient(760px 300px at 10% 15%, rgba(34,211,238,.18), transparent 65%),
              radial-gradient(700px 260px at 80% 30%, rgba(167,139,250,.16), transparent 65%);
  opacity: .9;
  z-index:-1;
}
.panel h3{margin:0 0 8px; font-size: 18px}
.panel p{color: var(--muted)}
.kpi{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}
.kpi .k{
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  padding: 14px;
}
.kpi strong{display:block; font-size: 20px}
.kpi span{color: var(--muted2); font-size: 12px}

.timeline{
  display:grid;
  gap: 12px;
}
.step{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 16px;
  display:flex;
  gap: 14px;
  align-items:flex-start;
}
.step .n{
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: linear-gradient(120deg, rgba(34,211,238,.24), rgba(167,139,250,.22), rgba(52,211,153,.18));
  border: 1px solid rgba(255,255,255,.12);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 900;
  letter-spacing: .2px;
}
.step h4{margin:0 0 2px; font-size: 15px}
.step p{color: var(--muted); font-size: 13px}

.faq{
  display:grid;
  gap: 10px;
}
details{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 14px 16px;
}
details summary{
  cursor:pointer;
  font-weight: 800;
  list-style:none;
}
details summary::-webkit-details-marker{display:none}
details summary .q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}
details summary .q span{
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
}
details p{
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}
details[open]{
  background: rgba(255,255,255,.06);
}

.contact{
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 22px;
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 16px;
  overflow:hidden;
  position:relative;
}
.contact::before{
  content:"";
  position:absolute;
  inset:-2px;
  background: radial-gradient(900px 260px at 15% 15%, rgba(34,211,238,.18), transparent 62%),
              radial-gradient(900px 260px at 85% 40%, rgba(167,139,250,.16), transparent 62%),
              radial-gradient(900px 260px at 65% 85%, rgba(52,211,153,.12), transparent 62%);
  opacity: .95;
  z-index:-1;
}
.contact h3{margin:0 0 8px; font-size: 20px}
.contact p{color: var(--muted)}
.contact .actions{
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
  margin-top: 14px;
}
.contact .box{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(7,10,18,.35);
  padding: 14px;
  display:grid;
  gap: 10px;
}
.contact .line{
  display:flex;
  align-items:center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}
.copy{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.05);
  cursor:pointer;
  color: var(--text);
  font-weight: 800;
  justify-content:space-between;
  max-width: 100%;
}
.copy span:first-child{
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy span:last-child{flex: 0 0 auto}

.site-footer{
  padding: 36px 0 44px;
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 36px;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr .6fr .6fr;
  gap: 16px;
  align-items:flex-start;
}
.footer-grid a{
  text-decoration:none;
  color: var(--muted);
}
.footer-grid a:hover{color: var(--text)}
.footer-grid h4{margin:0 0 8px; font-size: 13px; color: var(--text)}
.footer-grid p{color: var(--muted); font-size: 13px}

.chip{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.05);
  color: var(--muted);
  font-size: 12px;
  margin-top: 10px;
  width: fit-content;
}

.to-top{
  position: fixed;
  right: calc(18px + env(safe-area-inset-right));
  bottom: calc(18px + env(safe-area-inset-bottom));
  z-index: 220;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(7,10,18,.6);
  color: var(--text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}
.to-top.show{
  opacity:1;
  transform: translateY(0);
  pointer-events:auto;
}
.to-top:focus-visible{outline:none; box-shadow: var(--focus)}

.reveal{
  opacity:0;
  transform: translateY(10px);
  filter: blur(3px);
  transition: opacity .7s cubic-bezier(.2,.9,.2,1), transform .7s cubic-bezier(.2,.9,.2,1), filter .7s ease;
}
.reveal.in{
  opacity:1;
  transform: translateY(0);
  filter: blur(0);
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn, .card, .reveal{transition:none !important}
  .reveal{opacity:1 !important; transform:none !important; filter:none !important}
}

/* Responsive */
@media (max-width: 980px){
  :root{--navH: 68px;}
  .hero-inner{grid-template-columns: 1fr; gap: 16px}
  .hero-points{grid-template-columns: 1fr; }
  .cards-3{grid-template-columns: 1fr; }
  .cards-2{grid-template-columns: 1fr; }
  .split{grid-template-columns: 1fr}
  .contact{grid-template-columns: 1fr}
  .footer-grid{grid-template-columns: 1fr; }
  .section-header{flex-direction:column; align-items:flex-start;}
  .section-header p{max-width: 70ch}
  .chip{max-width: 100%; white-space: normal}
  .brand .wordmark span{display:none}
  .nav-links{display:none}
  .nav-cta a.btn-ghost{display:none}
  .hamburger{display:inline-flex; align-items:center; justify-content:center}
  .kpi{grid-template-columns: repeat(2, 1fr)}
}

@media (max-width: 680px){
  .kpi{grid-template-columns: 1fr}
  .step{flex-direction:column}
  .badge{flex-wrap:wrap}
}

@media (max-width: 520px){
  .container{width:min(var(--container), calc(100% - 32px));}
  .brand img{width:34px; height:34px}
  .nav-cta .btn-primary{padding: 10px 12px; border-radius: 12px; font-size: 13px}
  .hero{padding: 54px 0 26px;}
  .section{padding: 56px 0;}
  .panel{padding: 18px;}
  .card{padding: 16px;}
  .contact{padding: 18px;}
  .hero-card{padding: 16px;}
  .mobile-menu .panel .cta .btn{width:100%;}
}

/* Mobile menu panel */
.mobile-menu{
  position: fixed;
  inset: 0;
  z-index: 260;
  display:none;
}
.mobile-menu.open{display:block}
.mobile-menu .backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,.52);
  backdrop-filter: blur(6px);
}
.mobile-menu .panel{
  position:absolute;
  top: calc(14px + env(safe-area-inset-top));
  right: calc(14px + env(safe-area-inset-right));
  left: calc(14px + env(safe-area-inset-left));
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(7,10,18,.92);
  padding: 14px;
  box-shadow: var(--shadow);
  max-height: calc(100vh - 28px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  max-height: calc(100dvh - 28px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  overflow:auto;
}
.mobile-menu .panel .row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.mobile-menu .panel nav{
  display:grid;
  gap: 10px;
  margin: 12px 0;
}
.mobile-menu .panel nav a{
  text-decoration:none;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  padding: 12px 12px;
  border-radius: 16px;
}
.mobile-menu .panel nav a:focus-visible{outline:none; box-shadow: var(--focus)}
.mobile-menu .panel .cta{
  display:flex;
  gap: 10px;
  flex-wrap:wrap;
}