:root{
  --bg:#ffffff; --text:#111827; --muted:#6b7280; --card:#f8fafc; --border:#e5e7eb;
  --accent:#4f46e5; --accent2:#7c3aed; --shadow:0 10px 30px rgba(0,0,0,.08);
}
body.dark{
  --bg:#0f172a; --text:#f8fafc; --muted:#cbd5e1; --card:#111827; --border:#334155;
  --accent:#818cf8; --accent2:#a78bfa; --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.58}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.header-inner{min-height:90px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:14px;font-weight:800;color:var(--text)}
.brand img{width:86px;height:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{font-size:1.35rem}
.brand-text small{font-size:12px;color:var(--muted);font-weight:600}
.nav{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.nav a{color:var(--text);font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:12px;padding:10px 14px;cursor:pointer;font-weight:700;box-shadow:var(--shadow)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none}
.hero{padding:56px 0 34px;background:radial-gradient(circle at top right, rgba(79,70,229,.12), transparent 28%),radial-gradient(circle at top left, rgba(124,58,237,.10), transparent 24%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:start}
h1,h2,h3{line-height:1.15;margin:0 0 12px}
h1{font-size:clamp(2.1rem,5vw,4rem)}
h2{font-size:clamp(1.45rem,3vw,2.15rem)}
.lead{font-size:1.08rem;color:var(--muted);max-width:760px}
.hero-card,.card,.category-card,.mini-card{background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow)}
.hero-card,.card{border-radius:22px}
.hero-card,.card{padding:20px}
.category-card,.tool-link{display:block;padding:18px;border-radius:16px;color:var(--text)}
.category-card{background:var(--card);border:1px solid var(--border)}
.category-card:hover,.tool-link:hover{text-decoration:none;transform:translateY(-1px)}
.section{padding:30px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.tool-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.tool-link{border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow)}
.search-box{display:flex;gap:10px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:12px 14px;box-shadow:var(--shadow)}
.search-box input{width:100%;padding:0;border:0;background:transparent;color:var(--text);font-size:1rem;outline:none}
textarea,input[type="date"],input[type="text"],input[type="number"],select{
  width:100%;padding:12px 14px;margin:10px 0;border-radius:14px;border:1px solid var(--border);background:var(--bg);color:var(--text)
}
textarea{min-height:180px;resize:vertical}
.result{padding:16px;border-radius:16px;background:var(--card);border:1px solid var(--border);min-height:60px;white-space:pre-wrap;word-break:break-word}
.mini-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.mini-card{padding:14px;border-radius:16px}
.footer{margin-top:40px;padding:34px 0;border-top:1px solid var(--border);color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:start}
.footer-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}
.muted{color:var(--muted)}
.breadcrumbs{margin:20px 0 12px;font-size:.95rem;color:var(--muted)}
.badge{display:inline-block;padding:7px 10px;border-radius:999px;background:rgba(79,70,229,.10);color:var(--accent);font-weight:800;font-size:.85rem;margin-bottom:10px;}
.tool-copy h2{margin-top:20px}
.tool-copy p{margin:0 0 14px;color:var(--text)}
@media (max-width: 840px){
  .hero-grid{grid-template-columns:1fr}
  .header-inner{align-items:flex-start;padding:16px 0}
  .footer-grid{grid-template-columns:1fr}
}