:root{
  --bg:#eff6f3; --bg2:#f8fcfa; --card:rgba(255,255,255,.9); --line:#d7e0dc; --text:#213532; --muted:#5f726d;
  --accent:#377d72; --accent2:#69b6ab; --shadow:0 18px 50px rgba(33,53,50,.09); --wrap:min(1160px,calc(100% - 28px)); --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","Noto Sans JP",sans-serif;color:var(--text);background:radial-gradient(circle at 8% 10%,rgba(105,182,171,.12),transparent 18%),radial-gradient(circle at 90% 4%,rgba(85,170,115,.14),transparent 22%),linear-gradient(180deg,var(--bg),var(--bg2));}
a{text-decoration:none;color:inherit} img{display:block;max-width:100%}
.wrap{width:var(--wrap);margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.8);backdrop-filter:blur(14px);border-bottom:1px solid rgba(33,53,50,.08)}
.header-row{display:flex;justify-content:space-between;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px}.brand img{width:48px;height:48px;border-radius:12px}.brand span{display:flex;flex-direction:column}.brand small{color:var(--muted)}
.nav{display:flex;gap:16px;flex-wrap:wrap}.nav a{color:var(--muted);font-size:.95rem}
.hero{padding:40px 0 18px}.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:22px;align-items:center}
.eyebrow{margin:0 0 10px;color:#2f8c80;font-size:.8rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.hero-copy h1{margin:0 0 14px;font-size:clamp(2rem,4.2vw,3.5rem);line-height:1.16}
.lead{margin:0 0 18px;color:var(--muted);line-height:1.85;font-size:1.03rem}
.actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 20px;border-radius:999px;font-weight:800;border:1px solid transparent;box-shadow:0 10px 24px rgba(55,125,114,.12)}
.btn-primary{background:linear-gradient(135deg,#4da096,#71c8b7);color:#fff}.btn-secondary{background:#fff;border-color:#cfe0db;color:var(--text)}
.bullet-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;list-style:none;padding:0;margin:18px 0 0}.bullet-list li{padding:12px 14px;background:#fff;border:1px solid #e0e7e3;border-radius:16px;color:var(--muted);font-size:.93rem}
.shell,.screen-card,.point-card,.install-card,.download-box, .mini-features article{background:var(--card);border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);border-radius:var(--radius)}
.shell{overflow:hidden}.shell-head{display:flex;align-items:center;gap:7px;padding:12px 14px;border-bottom:1px solid #e5ece8;background:#fbfdfc}.shell-head span{width:10px;height:10px;border-radius:50%;background:#d9e3df}.shell-head span:first-child{background:#f0aa9d}.shell-head span:nth-child(2){background:#eed386}.shell-head span:nth-child(3){background:#99d1b0}.shell-head b{margin-left:6px;font-size:.95rem;color:#536561}
.hero-preview iframe,.featured-view iframe{display:block;width:100%;height:620px;border:0;background:#e6efed}
.intro,.actual-screens,.points,.install,.download{padding:28px 0}
.section-head{max-width:780px;margin:0 auto 20px;text-align:center}.section-head.align-left{text-align:left;margin-left:0}.section-head h2{margin:0 0 10px;font-size:clamp(1.75rem,3vw,2.6rem)}.section-head p{margin:0;color:var(--muted);line-height:1.8}
.mini-features{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.mini-features article{padding:20px}.mini-features img{width:56px;height:56px;image-rendering:pixelated;margin-bottom:10px}.mini-features h3{margin:0 0 8px}.mini-features p{margin:0;color:var(--muted);line-height:1.7;font-size:.95rem}
.viewer-tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-bottom:18px}.viewer-tab{border:1px solid #d4dfdb;background:#fff;color:var(--muted);border-radius:999px;min-height:46px;padding:0 16px;font:inherit;font-weight:800;cursor:pointer}.viewer-tab.is-active{background:linear-gradient(135deg,#4da096,#71c8b7);color:#fff;border-color:transparent}
.large-shell{margin-bottom:18px}
.screen-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.screen-card{padding:14px}.screen-card h3{margin:14px 0 8px}.screen-card p{margin:0;color:var(--muted);line-height:1.8}
.thumb-shell{overflow:hidden;border-radius:18px;border:1px solid #e2ebe7;background:#eef3f1}.thumb-shell iframe{display:block;width:100%;height:310px;border:0;background:#e6efed}
.point-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.point-card{padding:22px}.point-card h3{margin:0 0 10px}.point-card p{margin:0;color:var(--muted);line-height:1.8}
.install-grid{display:grid;grid-template-columns:1fr 360px;gap:18px;align-items:start}.steps{list-style:none;padding:0;margin:0;display:grid;gap:12px}.steps li{background:#fff;border:1px solid #e0e7e3;border-radius:20px;padding:16px 18px;display:grid;gap:6px;box-shadow:var(--shadow)}.steps span,.install-card li,.download-box p,.footer-row p{color:var(--muted);line-height:1.8}.install-card{padding:20px}.install-card ul{margin:0;padding-left:1.2em}
.download-box{padding:28px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.site-footer{padding:18px 0 42px}.footer-row{display:flex;justify-content:space-between;align-items:center;gap:18px;border-top:1px solid rgba(33,53,50,.08);padding-top:20px}.footer-links{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted)}
@media (max-width: 980px){.hero-grid,.install-grid,.download-box{grid-template-columns:1fr;display:grid}.mini-features,.point-grid,.screen-grid{grid-template-columns:repeat(2,1fr)}.hero-preview iframe,.featured-view iframe{height:560px}}
@media (max-width: 760px){.nav{display:none}.bullet-list,.mini-features,.point-grid,.screen-grid{grid-template-columns:1fr}.header-row,.footer-row{flex-direction:column;align-items:flex-start}.hero-preview iframe,.featured-view iframe{height:520px}.thumb-shell iframe{height:360px}}
@media (max-width: 480px){.hero{padding-top:24px}.actions{flex-direction:column}.btn{width:100%}.viewer-tab{width:calc(50% - 8px)}.hero-preview iframe,.featured-view iframe{height:470px}}