:root{
  --blue:#2563eb;--blue2:#1d4ed8;--ink:#172033;--muted:#5b6474;
  --bg:#f5f8fc;--card:#fff;--line:#dbe2ea;--soft:#eff6ff;
  --green:#15803d;--greenbg:#f0fdf4;--danger:#b91c1c;--dangerbg:#fef2f2;
  --shadow:0 5px 18px rgba(15,23,42,.06)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.6}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
button,input,select{font:inherit}
.container{max-width:1100px;margin:auto;padding:0 14px}
header.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:9px;font-weight:900;color:var(--ink);font-size:18px}
.logo{width:32px;height:32px;border-radius:9px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.navlinks{display:flex;gap:14px;align-items:center;font-size:13px;font-weight:700}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 10px}
.hero{margin:20px 0 14px;background:linear-gradient(135deg,#1e40af,#2563eb);color:#fff;border-radius:18px;padding:30px 24px;box-shadow:var(--shadow)}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.15;margin:0 0 9px}
.hero p{margin:0;color:#eaf2ff;max-width:850px}
.notice{background:var(--greenbg);border:1px solid #bbf7d0;color:#166534;padding:12px 14px;border-radius:12px;margin:14px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin:14px 0;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.tool-card{display:flex;flex-direction:column;min-height:150px}
.tool-card h3{margin:5px 0 4px;font-size:16px}
.tool-card p{color:var(--muted);font-size:13px;margin:0 0 12px;flex:1}
.badge{display:inline-block;align-self:flex-start;background:#eff6ff;color:#1d4ed8;border-radius:999px;padding:3px 8px;font-size:10px;font-weight:900}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:10px;background:var(--blue);color:#fff;padding:11px 15px;font-weight:850;cursor:pointer}
.btn:hover{background:var(--blue2);text-decoration:none}
.btn.secondary{background:#e8eef7;color:#172033}.btn.secondary:hover{background:#dbe5f2}
.btn.danger{background:#b91c1c}
.btn:disabled{opacity:.55;cursor:not-allowed}
.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:14px}
.tool-hero{margin:20px 0 14px}.tool-hero h1{margin:0 0 5px;font-size:30px}.tool-hero p{margin:0;color:var(--muted)}
.drop{display:block;border:2px dashed #93c5fd;background:var(--soft);border-radius:14px;padding:28px 14px;text-align:center;cursor:pointer;margin:15px 0}
.drop:hover{background:#e0edff}.drop strong{display:block;font-size:18px}.drop span{color:var(--muted);font-size:13px}
input[type=file]{display:none}
label{display:block;font-weight:800;font-size:13px;margin:0 0 6px}
input[type=number],input[type=text],input[type=color],select,textarea{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 12px;background:#fff;color:var(--ink)}
input[type=color]{height:44px;padding:4px}
textarea{min-height:100px;resize:vertical}
.field{margin-bottom:12px}
.check{display:flex;align-items:center;gap:8px;font-weight:700;margin:12px 0}.check input{width:auto}
.preview{max-width:100%;max-height:430px;border-radius:10px;display:block;margin:12px auto}
.preview-wrap{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px;margin-top:14px}
.result{background:var(--greenbg);border:1px solid #bbf7d0;color:#166534;border-radius:12px;padding:13px;margin-top:14px}
.error{background:var(--dangerbg);border:1px solid #fecaca;color:var(--danger);border-radius:12px;padding:12px;margin-top:12px}
.small{font-size:12px;color:var(--muted)}
.progress{height:9px;background:#e2e8f0;border-radius:99px;overflow:hidden;margin-top:12px}.progress>i{display:block;height:100%;width:0;background:var(--blue);transition:width .2s}
.tool-tabs{display:flex;gap:6px;background:#fff;border:1px solid var(--line);padding:4px;border-radius:12px;margin:14px 0}.tool-tabs button{flex:1;border:0;background:transparent;padding:10px;border-radius:8px;font-weight:800}.tool-tabs button.active{background:var(--blue);color:#fff}
canvas{max-width:100%}
.table{width:100%;border-collapse:collapse;font-size:13px}.table th,.table td{border-bottom:1px solid var(--line);padding:9px;text-align:left}
footer{padding:30px 0 42px;text-align:center;color:var(--muted);font-size:13px}.footnav{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:9px}
.notice strong{font-weight:900}
.ad-slot{min-height:90px;display:grid;place-items:center;border:1px dashed #cbd5e1;color:#94a3b8;border-radius:10px;margin:14px 0;font-size:12px}
@media(max-width:800px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.navlinks{gap:9px}}
@media(max-width:600px){
 .nav{min-height:58px}.menu-btn{display:block}.navlinks{display:none;position:absolute;left:10px;right:10px;top:58px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.navlinks.open{display:flex}
 .hero{padding:24px 18px}.card{padding:16px}.grid,.grid2{grid-template-columns:1fr}.tool-hero h1{font-size:26px}
 .actions .btn{width:100%}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}