/* Makuhari-Tune LP v2 — claude.ai/design "Makuhari-Tune LP.dc.html" の実装 */
:root{
  --accent:#3FE0E0;
  --bg:#0A0C0F;
  --ink:#F2F5F7;
  --ink-dim:rgba(242,245,247,.74);
  --ink-muted:rgba(242,245,247,.55);
  --ink-faint:rgba(242,245,247,.5);
  --exp-bg:#F3F0E8;
  --exp-ink:#12151B;
  --exp-muted:rgba(18,21,27,.66);
  --exp-line:rgba(18,21,27,.14);
  --sp:120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:'Zen Kaku Gothic New','Space Grotesk',sans-serif;
  -webkit-font-smoothing:antialiased; min-height:100vh; overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent)}
.wrap{max-width:1160px;margin:0 auto;padding:0 32px}
@keyframes mtGlow{0%,100%{opacity:.5}50%{opacity:.85}}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .hero .glow{animation:none}
}

/* Header */
.top{position:sticky;top:0;z-index:40;backdrop-filter:blur(14px);background:rgba(10,12,15,.72);border-bottom:1px solid rgba(255,255,255,.07)}
.top .inner{display:flex;align-items:center;gap:40px;height:72px}
.top .brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:19px;letter-spacing:-.01em}
.top nav{display:flex;gap:32px;font-size:14px;font-weight:500;color:rgba(242,245,247,.78)}
.top .sp{flex:1}
.top .lang{font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:500;color:rgba(242,245,247,.6)}
.btn-cta{display:inline-flex;align-items:center;gap:9px;height:42px;padding:0 22px 0 20px;border-radius:999px;background:var(--accent);color:#06181A;font-size:14px;font-weight:700;box-shadow:0 6px 24px rgba(63,224,224,.22);transition:transform .18s ease,box-shadow .18s ease}
.btn-cta:hover{color:#06181A;transform:translateY(-1px);box-shadow:0 10px 30px rgba(63,224,224,.32)}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 90% at 78% 18%, #13171D 0%, #0E1116 42%, #0A0C0F 100%)}
.hero .bg{position:absolute;inset:0;opacity:.55;pointer-events:none}
.hero .notes{position:absolute;right:8px;top:0;bottom:0;width:52px;display:flex;flex-direction:column;justify-content:center;align-items:flex-end;gap:26px;font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.14em;color:rgba(242,245,247,.16);pointer-events:none}
.hero .grid{position:relative;max-width:1160px;margin:0 auto;padding:0 32px;display:grid;grid-template-columns:minmax(0,1.06fr) minmax(300px,.94fr);gap:48px;align-items:center;min-height:640px}
.hero .copy{padding:96px 0 104px}
.hero .eyebrow{font-family:'Space Grotesk',sans-serif;font-size:12.5px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin-bottom:26px}
.hero .eyebrow .sep{color:rgba(242,245,247,.4);margin:0 6px}
.hero .eyebrow .ja{letter-spacing:.06em;font-family:'Zen Kaku Gothic New',sans-serif;color:rgba(242,245,247,.62);text-transform:none}
.hero h1{margin:0 0 30px;font-weight:900;font-size:clamp(46px,5.4vw,76px);line-height:1.14;letter-spacing:-.02em;text-wrap:pretty}
.hero .lede{margin:0 0 38px;font-size:17px;line-height:2;color:var(--ink-dim);max-width:30em;text-wrap:pretty}
.btn-hero{display:inline-flex;align-items:center;gap:11px;height:60px;padding:0 32px;border-radius:999px;background:var(--accent);color:#06181A;font-size:17px;font-weight:700;box-shadow:0 14px 40px rgba(63,224,224,.26);transition:transform .18s ease,box-shadow .18s ease}
.btn-hero:hover{color:#06181A;transform:translateY(-2px);box-shadow:0 20px 52px rgba(63,224,224,.36)}
.hero .note{margin-top:18px;font-size:12.5px;letter-spacing:.02em;color:var(--ink-faint)}
.hero .pillars{margin-top:56px;display:flex;align-items:stretch}
.hero .pillar{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;padding:0 34px}
.hero .pillar:first-child{padding-left:0}
.hero .pillar:last-child{padding-right:0}
.hero .pillar .icon{width:46px;height:46px;border-radius:999px;border:1px solid rgba(63,224,224,.38);display:grid;place-items:center;color:var(--accent)}
.hero .pillar .k{font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:600;letter-spacing:.14em}
.hero .pillar .v{font-size:11.5px;color:var(--ink-faint);line-height:1.5}
.hero .divider{width:1px;background:rgba(255,255,255,.1)}
.hero .visual{position:relative;display:flex;justify-content:center;align-items:flex-end;padding:80px 0 0;align-self:end}
.hero .glow{position:absolute;bottom:60px;width:100%;max-width:380px;aspect-ratio:1;border-radius:999px;background:radial-gradient(circle, rgba(63,224,224,.22) 0%, rgba(63,224,224,0) 68%);filter:blur(6px);animation:mtGlow 7s ease-in-out infinite}
.hero .phone{position:relative;width:300px;border:10px solid #1A1D22;background:#1A1D22;border-radius:44px;box-shadow:0 40px 90px rgba(0,0,0,.6)}

/* Sections */
section.block{padding:var(--sp) 0 0}
#features{scroll-margin-top:88px}
#steps{scroll-margin-top:88px}
#faq{scroll-margin-top:88px}
#cta{scroll-margin-top:88px}

/* Explainer cards (cream) */
.explain{background:var(--exp-bg);color:var(--exp-ink);border-radius:26px;padding:64px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.explain h2{margin:0 0 22px;font-size:clamp(26px,2.9vw,34px);font-weight:700;line-height:1.45;letter-spacing:-.02em}
.explain h2.nowrap{white-space:nowrap;line-height:1.4}
.explain p{margin:0;font-size:15.5px;line-height:2;color:var(--exp-muted);text-wrap:pretty}
.explain .art{position:relative}
.explain .scribble{position:absolute;right:74px;bottom:26px;font-family:'Caveat',cursive;font-size:30px;color:var(--exp-ink)}

/* Features */
.features h2{margin:0 0 12px;font-size:40px;font-weight:900;letter-spacing:-.01em}
.features .lede{margin:0 0 44px;font-size:15px;color:var(--ink-muted)}
.features .grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.feature{background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.08);border-radius:22px;padding:22px 22px 26px;transition:border-color .2s ease,transform .2s ease}
.feature:hover{border-color:rgba(63,224,224,.34);transform:translateY(-3px)}
.feature img{width:100%;max-width:168px;margin:0 auto 22px;border-radius:18px}
.feature h3{margin:0 0 8px;font-size:15.5px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.feature h3.tight{letter-spacing:-.03em}
.feature p{margin:0;font-size:13px;line-height:1.85;color:var(--ink-muted)}

/* Steps */
.steps-card{border:1px solid rgba(255,255,255,.09);border-radius:26px;background:linear-gradient(180deg, #14171B 0%, #0F1216 100%);padding:54px 56px 58px}
.steps-card h2{margin:0 0 44px;text-align:center;font-size:32px;font-weight:900;letter-spacing:-.01em}
.steps-grid{display:grid;grid-template-columns:minmax(0,1fr) 24px minmax(0,1fr) 24px minmax(0,1fr);align-items:start}
.step{display:flex;flex-direction:column;align-items:flex-start;gap:18px;padding-right:12px}
.step .icon{flex:none;width:60px;height:60px;border-radius:999px;border:1px solid rgba(63,224,224,.4);background:rgba(63,224,224,.06);display:grid;place-items:center;color:var(--accent)}
.step .k{font-size:14.5px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;margin-bottom:7px}
.step .v{font-size:12.5px;line-height:1.8;color:var(--ink-muted)}
.step-arrow{display:grid;place-items:center;padding-top:20px;color:rgba(242,245,247,.28)}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:minmax(0,.42fr) minmax(0,.58fr);gap:56px;align-items:start}
.faq-grid h2{margin:0;font-size:34px;font-weight:900;letter-spacing:-.01em;line-height:1.45;text-wrap:balance}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid rgba(255,255,255,.1);border-radius:14px;background:rgba(255,255,255,.03);overflow:hidden}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 22px;font-size:15px;font-weight:500;cursor:pointer;transition:color .18s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-item summary svg{flex:none;transition:transform .22s ease}
.faq-item[open] summary svg{transform:rotate(45deg)}
.faq-item .a{padding:0 22px 21px;font-size:13.5px;line-height:2;color:rgba(242,245,247,.6)}

/* CTA */
.cta-band{position:relative;overflow:hidden;border-radius:26px;background:linear-gradient(100deg, #26C6D2 0%, #3FE0E0 46%, #62E2EB 100%);color:#06181A;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:40px;padding:44px 52px}
.cta-band .wave{position:absolute;left:0;right:0;bottom:0;height:34px;opacity:.26;pointer-events:none}
.cta-band h2{margin:0 0 10px;font-size:clamp(24px,2.4vw,31px);font-weight:900;letter-spacing:-.01em;white-space:nowrap;position:relative}
.cta-band .lede{margin:0;font-size:14px;color:rgba(6,24,26,.72);position:relative}
.cta-band .action{position:relative;display:flex;flex-direction:column;align-items:center;gap:14px}
.btn-dark{display:inline-flex;white-space:nowrap;align-items:center;gap:11px;height:58px;padding:0 28px;border-radius:999px;background:#06181A;color:var(--ink);font-size:16px;font-weight:700;transition:transform .18s ease}
.btn-dark:hover{color:var(--ink);transform:translateY(-2px)}
.cta-band .note{font-size:12px;white-space:nowrap;color:rgba(6,24,26,.66)}

/* Footer */
footer{margin-top:var(--sp);border-top:1px solid rgba(255,255,255,.08)}
footer .inner{display:flex;align-items:center;gap:32px;padding:34px 32px 20px;max-width:1160px;margin:0 auto;font-size:13px;color:var(--ink-faint)}
footer .brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:16px;color:rgba(242,245,247,.82)}
footer .sp{flex:1}
footer nav{display:flex;gap:28px}
footer .copy{font-family:'Space Grotesk',sans-serif;letter-spacing:.02em}
footer .fine{max-width:1160px;margin:0 auto;padding:0 32px 44px;font-size:11.5px;line-height:1.8;color:rgba(242,245,247,.55)}

/* Responsive */
@media (max-width: 1120px){
  .explain h2.nowrap{white-space:normal}
}
@media (max-width: 960px){
  :root{--sp:88px}
  .top .inner{gap:20px}
  .top nav{display:none}
  .hero .grid{grid-template-columns:1fr;min-height:0;gap:0}
  .hero .copy{padding:72px 0 0}
  .hero .visual{padding:56px 0 0;align-self:auto}
  .hero .notes{display:none}
  .features .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature h3{white-space:normal}
  .explain{grid-template-columns:1fr;padding:40px 28px;gap:32px}
  .explain h2.nowrap{white-space:normal}
  .steps-card{padding:40px 28px}
  .steps-grid{grid-template-columns:1fr;gap:28px}
  .step-arrow{display:none}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-grid h2 br{display:none}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;gap:28px}
  .cta-band h2{white-space:normal}
  .cta-band .note{white-space:normal}
  .cta-band .action{align-items:flex-start}
  footer .inner{flex-wrap:wrap;gap:16px}
}
@media (max-width: 560px){
  .wrap{padding:0 20px}
  .hero .grid{padding:0 20px}
  .top .inner{padding:0 20px;gap:12px}
  .top .brand{white-space:nowrap;font-size:16px}
  .top .btn-cta{padding:0 14px;font-size:12.5px;white-space:nowrap}
  .top .lang{display:none}
  .hero h1{font-size:clamp(38px,11vw,46px)}
  .hero .pillars{flex-wrap:wrap;gap:20px}
  .hero .divider{display:none}
  .hero .pillar{padding:0;flex:1 1 40%}
  .features .grid{grid-template-columns:1fr}
  .feature h3{white-space:normal}
  .step .k{white-space:normal}
  footer .inner{padding:28px 20px 12px}
  footer .fine{padding:0 20px 36px}
}