:root{
  --bg:#f3f8fb;
  --surface:#ffffff;
  --ink:#1f2c3a;
  --brand:#0d6b9f;
  --brand2:#0fb98d;
  --line:#d7e3ea;
  --danger:#c33b4a;
  --ok:#1b8f53;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--ink);background:radial-gradient(1200px 600px at 100% -10%,#d4edf7,transparent),var(--bg)}
.topbar{padding:12px 16px;background:rgba(255,255,255,.9);backdrop-filter:blur(6px);position:sticky;top:0;border-bottom:1px solid var(--line);z-index:10}
.topbar-main{display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:8px;color:#0d415d;text-decoration:none;font-weight:800;font-size:1.1rem}
.brand img{width:34px;height:34px}
.desktop-nav-wrap{display:flex;flex:1 1 auto;justify-content:flex-end;min-width:0}
.desktop-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.mobile-nav{display:none;position:relative;margin-left:auto}
.mobile-nav summary{list-style:none}
.mobile-nav summary::-webkit-details-marker{display:none}
.nav-toggle{display:none;align-items:center;justify-content:center;width:52px;padding:12px 0;border-radius:16px;border:1px solid #c8d8e5;background:linear-gradient(180deg,#ffffff,#f1f8fc);box-shadow:0 10px 24px rgba(15,36,60,.10);cursor:pointer}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px}
.nav-toggle-bars span{display:block;width:18px;height:2px;border-radius:999px;background:#17435c;transition:transform .2s ease,opacity .2s ease}
.mobile-nav[open] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.mobile-nav[open] .nav-toggle-bars span:nth-child(2){opacity:0}
.mobile-nav[open] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.site-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.nav-link{display:inline-flex;align-items:center;gap:8px;color:#17435c;text-decoration:none;padding:8px 10px;border-radius:11px;font-size:.94rem;font-weight:700;white-space:nowrap;transition:background .2s ease,transform .2s ease,color .2s ease}
.nav-link:hover{background:#e9f4fb;transform:translateY(-1px)}
.nav-link.cta{background:#0f7fc4;color:#fff;box-shadow:0 10px 24px rgba(15,127,196,.22)}
.nav-text{line-height:1}
.nav-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;color:#2d6a86;flex:0 0 18px}
.nav-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nav-link.cta .nav-icon{color:#fff}
.container{max-width:980px;margin:18px auto;padding:0 14px 24px}
.hero{padding:20px 2px}
.hero h1{margin:0 0 8px;font-size:clamp(1.5rem,4vw,2.1rem)}
.hero p{margin:0;color:#476074}
.tool-links{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.tool-link{background:#eef7fd;border:1px solid #cae5f7;padding:10px 12px;border-radius:10px;color:#114360;text-decoration:none;font-weight:700;cursor:pointer}
.tool-link.strong{background:#daf6ec;border-color:#b6e8d6}
.eyebrow{display:inline-block;margin:0 0 10px;padding:6px 10px;border-radius:999px;background:#e8f3fb;color:#12506e;font-size:.78rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.mode-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.mode-tab{border:1px solid #b7d7ea;background:#f4fbff;color:#0f4764;padding:10px 12px;border-radius:10px;font-weight:800;cursor:pointer}
.mode-tab.active{background:linear-gradient(120deg,#0d6b9f,#0fb98d);color:#fff;border-color:transparent}
.active-mode{border:1px solid #d7e9f5}
.current-op{margin:0;font-size:.95rem}
.card{background:var(--surface);border-radius:16px;padding:16px;margin-bottom:16px;box-shadow:0 10px 28px rgba(15,36,60,.08)}
.category-hero{padding-bottom:8px}
.seo-section p{line-height:1.72}
.seo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.seo-card{padding:16px;border:1px solid #d7e6f0;border-radius:14px;background:linear-gradient(180deg,#fafdff,#eef7fd)}
.seo-card h3{margin-top:0}
.seo-card p{margin:0;color:#4c6678}
.seo-list{margin:0;padding-left:18px;line-height:1.8;color:#3f5b6f}
.faq-list{display:grid;gap:10px}
.faq-item{border:1px solid #d8e5ee;border-radius:14px;background:#fbfdff;padding:10px 12px}
.faq-item summary{cursor:pointer;font-weight:800;color:#194b66}
.faq-item p{margin:10px 0 2px;color:#476074}
h2,h3{margin:6px 0 12px}
.muted{color:#557083;font-size:.92rem}
.warn{background:#fff3cd;border:1px solid #efdca0;border-radius:10px;padding:10px}
.row{display:flex;gap:12px;align-items:end;flex-wrap:wrap}
.row > div{flex:1;min-width:180px}
label{font-weight:700;font-size:.92rem;display:block;margin-bottom:6px}
input,select,button{width:100%;padding:12px;border-radius:11px;border:1px solid #c9d9e3;font-size:1rem}
input:focus,select:focus{outline:none;border-color:#62a8d0;box-shadow:0 0 0 3px rgba(60,140,190,.16)}
.btn-primary{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;border:none;font-weight:800;cursor:pointer}
.btn-primary:hover{opacity:.95}
.dropzone{border:2px dashed #8ec4df;background:#f8fcff;padding:22px;border-radius:14px;text-align:center;cursor:pointer;margin-bottom:14px}
.dropzone.dragover{background:#e8f6ff;border-color:#2196d4}
.dropzone input{display:none}
.file-picked{font-size:.9rem;color:#244b63;margin-bottom:6px}
.file-list{margin:0 0 10px 16px;padding:0;color:#34586f;font-size:.9rem}
.file-list li{margin:3px 0}
.adv{margin-top:12px;background:#f9fcff;border:1px solid #e2eef7;border-radius:12px;padding:10px}
.adv summary{cursor:pointer;font-weight:700;margin-bottom:10px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:10px;border-bottom:1px solid var(--line);white-space:nowrap}
.flash{padding:11px;border-radius:10px;margin-bottom:10px}
.flash.success{background:#e8f8ef;color:var(--ok)}
.flash.error{background:#ffe8ed;color:var(--danger)}
.inline-form{display:flex;gap:6px;align-items:center}
.inline-form select,.inline-form button{padding:6px 8px}
.admin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}
.auth{max-width:560px;margin-inline:auto}
.footer{text-align:center;padding:20px;color:#5f7a8f;font-size:.86rem}
.footer-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}
.footer-links a{text-decoration:none;color:#2b5974}
.terms p{line-height:1.75}
.progress-wrap{width:100%;height:14px;background:#e8eff5;border-radius:999px;overflow:hidden;margin:8px 0 10px}
.progress-bar{width:0;height:100%;background:linear-gradient(90deg,#1099d6,#0fb98d);transition:width .25s ease}
#download-link{display:inline-block;padding:10px 14px;border-radius:10px;background:#0b7cc0;color:#fff;text-decoration:none;font-weight:700}
#download-link:hover{opacity:.92}
@media (max-width:760px){
  .topbar{padding:10px 14px}
  .topbar-main{gap:12px;justify-content:space-between}
  .brand{font-size:1.02rem}
  .brand img{width:30px;height:30px}
  .desktop-nav-wrap{display:none}
  .mobile-nav{display:block;flex:0 0 auto;margin-left:auto}
  .nav-toggle{display:inline-flex}
  .mobile-nav-panel{display:none;position:absolute;right:0;top:calc(100% + 10px);z-index:20;width:min(320px,calc(100vw - 28px));flex-direction:column;align-items:stretch;gap:6px;padding:12px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.98);box-shadow:0 18px 34px rgba(15,36,60,.14)}
  .mobile-nav[open] .mobile-nav-panel{display:flex}
  .mobile-nav-panel .nav-link{display:flex;font-size:.96rem;padding:12px 14px;border-radius:12px}
  .seo-grid{grid-template-columns:1fr}
  .container{padding:0 10px 22px}
  .card{border-radius:14px;padding:13px}
}