:root{
 --ink:#14213d;
 --ink2:#4a5672;
 --muted:#7b8499;
 --line:#e3e7ee;
 --bg:#ffffff;
 --bg-light:#f5f7fa;
 --green:#14213d;
 --green-dark:#0a1328;
 --green-soft:#e9edf5;
 --label:#3b5998;
 --term-bg:#0c1427;
 --term-line:#1f2b48;
 --term-ink:#c9d5ec;
 --term-green:#7cc4ff;
 --term-muted:#8d9bba;
 --term-amber:#f2c66d;
 --mono:"JetBrains Mono",ui-monospace,monospace;
 --jp:"Noto Sans JP",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--jp);font-size:16px;line-height:1.9;overflow-x:hidden}
a{color:inherit}
h1,h2,h3{line-height:1.4}
.inner{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:860px}

/* ヘッダー */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(20,33,61,.08)}
.site-header .inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;text-decoration:none}
.logo img{display:block;height:30px;width:auto}
.nav{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:500;letter-spacing:.04em}
.nav a{text-decoration:none;color:var(--ink2)}
.nav a:hover,.nav a[aria-current="page"]{color:var(--green)}
.nav a[aria-current="page"]{font-weight:700}
.nav .nav-cta{padding:9px 20px;border-radius:999px;background:var(--green);color:#fff;letter-spacing:0}
.nav .nav-cta:hover{background:var(--green-dark);color:#fff}
.menu-toggle{display:none;width:40px;height:40px;border:0;background:none;padding:10px;cursor:pointer}
.menu-toggle span{display:block;height:2px;background:var(--ink);margin:6px 0;transition:transform .2s}
.menu-toggle[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* hero：枠なしで、紺地にコードが溶け込んで流れる */
.hero{position:relative;height:min(86vh,760px);min-height:540px;background:var(--term-bg);overflow:hidden;color:#fff;isolation:isolate}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(420px circle at var(--mx,70%) var(--my,40%),rgba(124,196,255,.10),transparent 70%);opacity:var(--glow,0);transition:opacity .4s;z-index:1}
.hero-code{position:absolute;inset:0;margin:0;padding:24px;overflow:hidden;font-family:var(--mono);font-size:13px;line-height:1.75;color:var(--term-ink);white-space:pre-wrap;word-break:break-all;display:flex;flex-direction:column;justify-content:flex-end;-webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 25%);mask-image:linear-gradient(180deg,transparent 0%,#000 25%)}
.hero-code>div{min-width:0}
.hero-code .p{color:#e6ecf8}.hero-code .ps{color:var(--term-green)}
.hero-code .m{color:var(--term-muted)}.hero-code .y{color:var(--term-amber)}.hero-code .ok{color:#7ee2a8}
.hero-over{position:absolute;inset:0;display:flex;align-items:center;z-index:2;background:linear-gradient(90deg,rgba(12,20,39,.9) 0%,rgba(12,20,39,.75) 40%,rgba(12,20,39,0) 55%)}
@media(min-width:981px){.hero-code{padding:24px 24px 28px 52%;font-size:14px}}
.hero-over .inner{width:100%}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;color:#9cc2ff;margin:0 0 16px}
.hero h1{font-size:clamp(34px,5vw,60px);margin:0 0 22px;font-weight:700;line-height:1.3}
.lead{color:#c9d5ec;margin:0 0 34px;font-size:16px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-size:14px;font-weight:500;text-decoration:none;transition:background .2s,color .2s,border-color .2s}
.btn-white{background:#fff;color:var(--green)}
.btn-white:hover{background:#dfe7f6}
.btn-line{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-line:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark)}
.cursor{display:inline-block;width:8px;height:1.05em;margin-left:2px;vertical-align:-2px;background:#e6ecf8;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* セクション共通 */
.section{padding:96px 0}
.bg-light{background:var(--bg-light)}
.sec-head{text-align:center;margin-bottom:48px}
.sec-en{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--label);margin:0 0 6px}
.sec-head h2,.contact h2{font-size:clamp(24px,3vw,30px);margin:0;font-weight:700}

.about-sub{text-align:center;font-size:20px;margin:0 0 20px}
.about-text{text-align:center;color:var(--ink2);margin:0}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px 24px 28px;transition:box-shadow .2s,transform .2s}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(20,33,61,.08)}
.card-tag{display:inline-block;font-family:var(--mono);font-size:11.5px;color:var(--green-dark);background:var(--green-soft);padding:2px 10px;border-radius:4px;margin:0 0 14px}
.card h3{font-size:17px;margin:0 0 10px}
.card p:last-child{margin:0;font-size:14px;color:var(--ink2);line-height:1.85}

.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.flow li{padding:28px 22px;border:1px solid var(--line);border-top:3px solid var(--green);border-radius:0 0 10px 10px;background:#fff}
.step{font-family:var(--mono);font-size:13px;color:var(--label);font-weight:600}
.flow h3{font-size:17px;margin:6px 0 8px}
.flow p{margin:0;font-size:14px;color:var(--ink2);line-height:1.85}

.works{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.work{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px}
.work-cat{font-size:12px;color:var(--green-dark);font-weight:500;margin:0 0 6px}
.work h3{font-size:16.5px;margin:0 0 8px}
.work p:last-child{margin:0;font-size:14px;color:var(--ink2);line-height:1.85}

.stack{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.stack li{font-family:var(--mono);font-size:13px;padding:7px 16px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink2)}

.company{margin:0;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 32px}
.company div{display:grid;grid-template-columns:160px 1fr;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.company div:last-child{border-bottom:0}
.company dt{font-weight:700;font-size:14.5px}
.company dd{margin:0;color:var(--ink2);font-size:14.5px}

.contact{padding:88px 0;background:var(--green);color:#fff;text-align:center}
.contact h2{margin-bottom:18px}
.contact p:last-child{margin:0;color:#c9d5ec}
.contact .sec-en{color:#9cc2ff}

/* フッター */
.site-footer{padding:40px 0;background:var(--green-dark);color:#c9d5ec}
.site-footer .inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.logo-sm img{height:26px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:12.5px}
.site-footer nav a{text-decoration:none;color:#aab6d0}
.site-footer nav a:hover{color:#fff}
.copy{margin:0;font-size:12px;color:#8592b0}

/* 下層ページの見出し */
.page-hero{position:relative;padding:84px 0 72px;background:var(--term-bg);color:#fff;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 0%,rgba(124,196,255,.14),transparent 70%)}
.page-hero .inner{position:relative}
.page-hero .sec-en{color:#9cc2ff}
.page-hero h1{font-size:clamp(28px,4vw,40px);margin:0;font-weight:700}
.page-lead{margin:14px 0 0;color:#c9d5ec}
.post-hero h1{font-size:clamp(22px,3vw,30px);line-height:1.5}
.post-hero .post-meta{color:#9cc2ff}
.post-hero .post-meta span{border-color:rgba(156,194,255,.4)}

.more{text-align:center;margin:40px 0 0}
.more-link{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:500;text-decoration:none;color:var(--green);border-bottom:1px solid currentColor;padding-bottom:4px}
.more-link span{transition:transform .2s}
.more-link:hover span{transform:translateX(4px)}
.back{margin:48px 0 0}
.back .more-link:hover span{transform:translateX(-4px)}
.contact-btn{margin-top:28px!important}

.card-list{list-style:none;margin:16px 0 0;padding:14px 0 0;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink2)}
.card-list li{position:relative;padding-left:14px;line-height:1.8;margin:4px 0}
.card-list li::before{content:"";position:absolute;left:0;top:.75em;width:6px;height:1px;background:var(--label)}
.values{grid-template-columns:repeat(3,1fr)}

/* ブログ */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post-card{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;text-decoration:none;transition:box-shadow .2s,transform .2s,border-color .2s}
.post-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(20,33,61,.08);border-color:#c9d2e3}
.post-meta{display:flex;align-items:center;gap:10px;margin:0 0 10px;font-size:12px;color:var(--muted);font-family:var(--mono)}
.post-meta span{font-family:var(--jp);border:1px solid var(--line);border-radius:4px;padding:0 8px}
.post-card h3{font-size:16px;margin:0 0 8px;line-height:1.6}
.post-card p:last-child{margin:0;font-size:13.5px;color:var(--ink2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.prose{font-size:16px;line-height:2}
.prose h2{font-size:21px;margin:56px 0 16px;padding-left:14px;border-left:4px solid var(--green)}
.prose p{margin:0 0 20px}
.prose ul,.prose ol{margin:0 0 24px;padding:18px 20px 18px 40px;background:var(--bg-light);border-radius:8px}
.prose li{margin:4px 0}
.notice{text-align:center;padding:48px 24px;border:1px solid var(--line);border-radius:10px}
.notice h2{font-size:20px;margin:0 0 12px}
.notice p{margin:0;color:var(--ink2)}

/* 動き：JS が html に .anim を付けたときだけ隠す（JS なしでも見える） */
.anim .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease;transition-delay:var(--d,0s)}
.anim .reveal.is-in{opacity:1;transform:none}
.card,.work,.post-card{position:relative}
.card::after,.work::after,.post-card::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(240px circle at var(--mx,50%) var(--my,50%),rgba(59,89,152,.07),transparent 70%);opacity:0;transition:opacity .3s}
.card:hover::after,.work:hover::after,.post-card:hover::after{opacity:1}

/* 404 */
.notfound{min-height:60vh;display:grid;place-content:center;text-align:center;padding:40px 16px}
.notfound h1{font-size:26px;margin:0 0 10px}
.notfound p{color:var(--ink2);margin:0 0 24px}

@media(max-width:980px){
 .hero-over{background:linear-gradient(180deg,rgba(12,20,39,.55) 0%,rgba(12,20,39,.78) 60%)}
 .about-text br{display:none}
 .cards,.flow{grid-template-columns:repeat(2,1fr)}
 .works,.posts{grid-template-columns:repeat(2,1fr)}
 .values{grid-template-columns:1fr}
}
@media(max-width:760px){
 .menu-toggle{display:block}
 .nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px 24px 20px;background:#fff;border-bottom:1px solid var(--line);display:none}
 .nav.is-open{display:flex}
 .nav a{padding:14px 0;border-bottom:1px solid var(--line)}
 .nav .nav-cta{margin-top:14px;text-align:center;border-bottom:0}
}
@media(max-width:600px){
 body{font-size:15px}
 .inner{padding:0 16px}
 .hero{height:auto;min-height:600px}
 .hero-code{font-size:11px;padding:14px}
 .lead br{display:none}
 .section{padding:68px 0}
 .sec-head{margin-bottom:34px}
 .about-text br{display:none}
 .about-text{text-align:left}
 .cards,.flow,.works,.posts{grid-template-columns:1fr}
 .page-hero{padding:56px 0 48px}
 .prose{font-size:15px}
 .prose h2{font-size:19px;margin-top:44px}
 .company{padding:4px 20px}
 .company div{grid-template-columns:1fr;gap:4px}
 .site-footer .inner{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){
 *{animation:none!important;transition:none!important}
 html{scroll-behavior:auto}
}