:root{
  --bg:#0b1220;
  --text:#eaf0ff;
  --muted:#b8c3e6;
  --line:rgba(255,255,255,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --radius: 16px;
  --max: 1120px;
}
*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Arial, sans-serif;
  color:var(--text);
  background: var(--bg); /* ←単一色 */
}

a{color:inherit;text-decoration:none}
.container{max-width:var(--max); margin:0 auto; padding:0 20px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px; border-radius:12px; border:1px solid var(--line);
  background:rgba(255,255,255,.06);
  transition:.2s ease;
  gap:10px;
  cursor:pointer;
}
.btn:hover{transform:translateY(-1px); border-color:rgba(255,255,255,.18); background:rgba(255,255,255,.09)}
.btn.primary{
  background: linear-gradient(135deg, rgba(110,168,255,.95), rgba(126,240,213,.85));
  color:#07101f;
  border:0;
  font-weight:700;
}
.pill{
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 10px; border-radius:999px; border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--muted);
  font-size:13px;
}
header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(12px);
  background:rgba(7,12,22,.55);
  border-bottom:1px solid var(--line);
}
.nav{display:flex; align-items:center; justify-content:space-between; height:68px}
.brand{display:flex; align-items:center; gap:12px; font-weight:800; letter-spacing:.02em}
.logo{
  width:36px; height:36px; border-radius:12px;
  background: linear-gradient(135deg, rgba(110,168,255,1), rgba(126,240,213,1));
  box-shadow: var(--shadow);
}
nav ul{list-style:none; display:flex; gap:10px; padding:0; margin:0; color:var(--muted); font-size:14px}
nav a{padding:10px 10px; border-radius:10px}
nav a:hover{background:rgba(255,255,255,.06); color:var(--text)}
nav a.active{background:rgba(255,255,255,.10); color:var(--text); border:1px solid rgba(255,255,255,.14)}
main{padding:38px 0 12px}
.section-title{display:flex; align-items:flex-end; justify-content:space-between; gap:18px; margin:0 0 16px}
.section-title h1,.section-title h2{margin:0; font-size:22px; letter-spacing:.01em}
.section-title p{margin:0; color:var(--muted); font-size:14px}
.card{
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.grid3{display:grid; grid-template-columns: repeat(3, 1fr); gap:14px}
.grid2{display:grid; grid-template-columns: repeat(2, 1fr); gap:14px}
.service{padding:18px}
.service h3{margin:10px 0 8px; font-size:18px}
.service p{margin:0; color:var(--muted); line-height:1.75; font-size:14px}
.tagrow{display:flex; gap:8px; flex-wrap:wrap; margin-top:12px}
.tag{
  font-size:12px; color:var(--muted);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  padding:6px 10px; border-radius:999px;
}
.list{margin:0; padding:0; list-style:none; display:grid; gap:10px; color:var(--muted); line-height:1.7; font-size:14px}
.list li{padding:12px 12px; border:1px solid var(--line); border-radius:14px; background:rgba(0,0,0,.10)}
.flow{display:grid; grid-template-columns: repeat(5, 1fr); gap:10px}
.step{padding:14px; border:1px solid var(--line); border-radius:14px; background:rgba(0,0,0,.10)}
.step .n{
  display:inline-flex; align-items:center; justify-content:center;
  width:26px; height:26px; border-radius:10px;
  background:rgba(110,168,255,.20);
  border:1px solid rgba(110,168,255,.35);
  font-weight:800; font-size:13px; margin-bottom:10px;
}
.step .t{font-weight:800; margin:0 0 6px}
.step .d{margin:0; color:var(--muted); font-size:13px; line-height:1.65}
.dl{
  display:grid;
  grid-template-columns: 220px 1fr;
  gap:10px 14px;
  margin:0;
  color:var(--muted);
  font-size:14px;
  line-height:1.7;
}
.dl dt{
  color:var(--text);
  font-weight:700;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(255,255,255,.04);
}
.dl dd{
  margin:0;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(0,0,0,.10);
}
.contact{
  padding:18px;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:14px;
  align-items:start;
}
label{display:block; font-size:13px; color:var(--muted); margin:0 0 6px}
input, textarea{
  width:100%;
  border:1px solid var(--line);
  background:rgba(0,0,0,.18);
  color:var(--text);
  padding:12px 12px;
  border-radius:12px;
  outline:none;
  font-size:14px;
}
textarea{min-height:140px; resize:vertical}
.note{color:var(--muted); font-size:12px; line-height:1.7}
footer{padding:26px 0 36px; border-top:1px solid var(--line); color:var(--muted); font-size:13px}
.foot{display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap}
.hero{padding:18px 0 6px}
.hero-grid{display:grid; grid-template-columns: 1.2fr .8fr; gap:22px; align-items:stretch}
.hero h1{margin:14px 0 10px; font-size: clamp(28px, 4vw, 44px); line-height:1.12; letter-spacing:.01em}
.hero p{margin:0; color:var(--muted); font-size:16px; line-height:1.8}
.hero-actions{display:flex; gap:12px; margin-top:18px; flex-wrap:wrap}

@media (max-width: 920px){
  .hero-grid{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .dl{grid-template-columns:1fr}
  nav ul{flex-wrap:wrap}
}
/* =========================
   Mobile Hamburger Menu
   ========================= */
.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.06);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:.2s ease;
}
.menu-toggle:hover{
  transform:translateY(-1px);
  border-color:rgba(255,255,255,.18);
  background:rgba(255,255,255,.09);
}
.menu-toggle__icon{
  display:block;
  width:18px;
  height:2px;
  background:rgba(255,255,255,.85);
  border-radius:2px;
  position:relative;
}
.menu-toggle__icon::before,
.menu-toggle__icon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:rgba(255,255,255,.85);
  border-radius:2px;
}
.menu-toggle__icon::before{ top:-6px; }
.menu-toggle__icon::after{ top:6px; }

/* site-nav default (desktop) */
.site-nav{
  display:block;
}
.site-nav__panel{
  display:block;
}
.site-nav__cta{
  display:none; /* desktopでは隠す（header-ctaを使う） */
}

/* Mobile behavior */
@media (max-width: 920px){
  .menu-toggle{ display:inline-flex; }
  .header-cta{ display:none; } /* スマホはCTAをメニュー内に入れる */

  /* ヘッダーの横並び崩れ防止：brand + hamburger */
  .nav{ gap:10px; }
  header nav ul{ flex-wrap:nowrap; } /* 既存のwrapを抑制 */

  /* オーバーレイ土台（クリックで閉じる背景） */
  .site-nav{
    position:fixed;
    inset:0;
    z-index:100;
    pointer-events:none;
  }
  .site-nav::before{
    content:"";
    position:absolute;
    inset:0;
    background:rgba(0,0,0,.55);
    opacity:0;
    transition:opacity .18s ease;
  }

  /* パネル（メニュー本体） */
  .site-nav__panel{
    position:absolute;
    top:76px;
    left:12px;
    right:12px;
    border-radius:16px;
    border:1px solid rgba(255,255,255,.14);
    background:rgba(7,12,22,.92);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    padding:12px;
    transform: translateY(-10px);
    opacity:0;
    transition: transform .18s ease, opacity .18s ease;
    pointer-events:none;
  }
  .site-nav__panel ul{
    list-style:none;
    margin:0;
    padding:0;
    display:grid;
    gap:6px;
  }
  .site-nav__panel a{
    display:block;
    padding:12px 12px;
    border-radius:12px;
    color:var(--text);
  }
  .site-nav__panel a:hover{
    background:rgba(255,255,255,.08);
  }
  .site-nav__panel a.active{
    background:rgba(255,255,255,.10);
    border:1px solid rgba(255,255,255,.14);
  }

  .site-nav__cta{
    display:block;
    margin-top:10px;
    padding-top:10px;
    border-top:1px solid rgba(255,255,255,.12);
  }

  /* OPEN 状態 */
  body.nav-open{
    overflow:hidden; /* 背景スクロール抑止 */
  }
  body.nav-open .site-nav{
    pointer-events:auto;
  }
  body.nav-open .site-nav::before{
    opacity:1;
  }
  body.nav-open .site-nav__panel{
    transform: translateY(0);
    opacity:1;
    pointer-events:auto;
  }

  /* OPEN時にハンバーガーを×に変形 */
  body.nav-open .menu-toggle__icon{
    background:transparent;
  }
  body.nav-open .menu-toggle__icon::before{
    top:0;
    transform:rotate(45deg);
  }
  body.nav-open .menu-toggle__icon::after{
    top:0;
    transform:rotate(-45deg);
  }
}