:root{
  --bg:#f7fafc; --card:#fff; --muted:#5b6875; --text:#0f172a;
  --accent:#3b82f6; --accent2:#22d3ee; --border:#e5e7eb;
  --shadow:0 8px 24px rgba(16,24,40,.08);
}
:root[data-theme="dark"]{
  --bg:#0b1220; --card:#0f172a; --muted:#9aa4b2; --text:#e7ecf2;
  --accent:#60a5fa; --accent2:#22d3ee; --border:#1f2937;
  --shadow:0 10px 35px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0b1220; --card:#0f172a; --muted:#9aa4b2; --text:#e7ecf2;
    --accent:#60a5fa; --accent2:#22d3ee; --border:#1f2937;
    --shadow:0 10px 35px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);font:15px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial}
a{color:var(--accent);text-decoration:none}
.header{position:sticky;top:0;z-index:20;backdrop-filter:saturate(160%) blur(6px);
  background:linear-gradient(90deg,color-mix(in oklab,var(--accent) 15%,transparent),color-mix(in oklab,var(--accent2) 15%,transparent));
  border-bottom:1px solid var(--border)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 24px}
.brand{font-weight:800;font-size:18px;letter-spacing:.2px}
.nav a{margin-left:16px;color:var(--muted)}
.wrap{max-width:1120px;margin:0 auto;padding:24px}
.hero{padding:18px 0 8px}
.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:20px;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.tool{display:block;padding:16px;border:1px solid var(--border);border-radius:14px;background:radial-gradient(60% 80% at 20% 10%, color-mix(in oklab, var(--accent) 10%, transparent), transparent 40%), var(--card);transition:.2s transform,.2s box-shadow}
.tool:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(0,0,0,.12)}
.tool h3{margin:0 0 6px;font-size:16px;display:flex;align-items:center}
.tool p{margin:0;color:var(--muted);font-size:13px}
.footer{margin:24px 0;color:var(--muted);font-size:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;
  padding:10px 14px;border-radius:12px;font-weight:700;border:0;cursor:pointer;
  box-shadow:0 6px 18px color-mix(in oklab,var(--accent2) 25%,transparent);transition:.2s transform,.2s background}
.btn:hover{transform:translateY(-1px)}
.btn.sec{background:transparent;color:var(--text);border:1px solid var(--border);box-shadow:none}
.btn.sec:hover{background:color-mix(in oklab,var(--bg) 90%,var(--accent))}
.btn.icon{padding:8px 10px;border-radius:10px;background:transparent;border:1px solid var(--border)}
.btn.icon:hover{background:color-mix(in oklab,var(--bg) 90%,var(--accent))}
.input,select,textarea{width:100%;background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.0));color:var(--text);border:1px solid var(--border);border-radius:12px;padding:10px}
.input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in oklab,var(--accent) 50%,transparent)}
.row{display:flex;gap:12px;flex-wrap:wrap}
label{display:block;margin:8px 0 6px;color:var(--muted);font-weight:600;font-size:13px}
hr{border:0;border-top:1px solid var(--border);margin:18px 0}
.banner{min-height:90px;border:1px dashed color-mix(in oklab,var(--border) 80%,var(--bg));border-radius:14px;display:none;align-items:center;justify-content:center;color:var(--muted);margin:12px 0}
.banner:empty{display:none}
.notice{padding:12px 14px;border:1px solid color-mix(in oklab,var(--border) 85%,var(--bg));border-radius:12px;background:linear-gradient(180deg,color-mix(in oklab,var(--accent) 10%,var(--bg)),var(--bg));color:color-mix(in oklab,var(--text) 85%,var(--muted))}
.small{font-size:12px;color:var(--muted)}
table{width:100%;border-collapse:collapse}
td,th{border:1px solid var(--border);padding:8px}
.center{display:flex;align-items:center;justify-content:center}
canvas.preview{max-width:100%;border-radius:12px;border:1px solid var(--border)}
#consent{position:fixed;inset:auto 0 0 0;background:color-mix(in oklab,var(--accent) 12%,var(--bg));border-top:1px solid var(--border);padding:12px;display:none;z-index:9999}
#consent .btn{margin-left:8px}
kbd{background:color-mix(in oklab,var(--bg) 85%,black);padding:2px 6px;border-radius:6px;border:1px solid var(--border);font-size:12px}
.icon-wrap{display:inline-flex;align-items:center;gap:6px}
.icon-wrap svg{width:18px;height:18px;display:block}
#icon-sun{display:none}
:root[data-theme="light"] #icon-sun{display:block}
:root[data-theme="light"] #icon-moon{display:none}
:root[data-theme="dark"] #icon-sun{display:none}
:root[data-theme="dark"] #icon-moon{display:block}
/* SEO section */
.seo{margin-top:16px}
.seo h2{margin:18px 0 8px}
.seo h3{margin:14px 0 6px}
.seo p{color:var(--muted)}
.seo ul{margin:8px 0 12px}
.seo li{margin:4px 0}
.breadcrumbs{font-size:12px;color:var(--muted);margin-bottom:10px}
.breadcrumbs a{color:var(--muted)}
/* Icons */
.tool .ico{width:22px;height:22px;margin-right:8px;vertical-align:-4px;opacity:.9}
.ico-lg{width:28px;height:28px;margin-right:8px;vertical-align:-6px;opacity:.95}
.icon-title{display:flex;align-items:center;gap:8px}