:root{
  --brand:#e63946; --brand-dark:#c1121f; --ink:#1d1d1f; --muted:#6b7280;
  --bg:#ffffff; --bg-soft:#f8fafc; --card:#ffffff; --border:#e5e7eb;
  --radius:14px; --shadow:0 2px 12px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:22px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo:hover{text-decoration:none}
.logo-icon{font-size:26px}
.main-nav{display:flex;gap:22px}
.main-nav a{color:var(--ink);font-weight:500}
.main-nav a:hover{color:var(--brand)}

/* hero */
.hero{text-align:center;padding:56px 20px 30px;background:linear-gradient(180deg,#fff5f5,#ffffff)}
.hero h1{font-size:clamp(28px,5vw,44px);margin:0 0 10px;letter-spacing:-.5px}
.hero h1 span{color:var(--brand)}
.hero p{color:var(--muted);font-size:18px;max-width:640px;margin:0 auto}
.hero-badges{display:flex;gap:10px;justify-content:center;margin-top:18px;flex-wrap:wrap}
.badge{background:#eef2ff;color:#3730a3;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px}

/* tools grid */
.tools-section{padding:30px 0 10px}
.tools-section h2{text-align:center;margin-bottom:6px}
.tools-sub{text-align:center;color:var(--muted);margin-top:0;margin-bottom:26px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;color:var(--ink);display:block}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,.1);text-decoration:none}
.tool-card .t-icon{font-size:34px}
.tool-card h3{margin:10px 0 6px;font-size:17px}
.tool-card p{margin:0;color:var(--muted);font-size:14px}

/* tool page */
.crumbs{font-size:14px;color:var(--muted);margin:26px 0 6px}
.tool-head h1{margin:4px 0 8px;font-size:30px}
.tool-desc{color:var(--muted);max-width:720px;margin:0 0 18px}
.dropzone{border:2px dashed #cbd5e1;border-radius:var(--radius);background:var(--bg-soft);padding:44px 20px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.dropzone:hover,.dropzone.dragover{border-color:var(--brand);background:#fff5f5}
.dropzone .dz-icon{font-size:44px}
.dropzone p{margin:8px 0}
.dz-hint{font-size:13px;color:var(--muted)}
.file-list{margin:14px 0;display:flex;flex-direction:column;gap:8px}
.file-item{display:flex;align-items:center;justify-content:space-between;background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-size:14px}
.file-item .fname{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:70%}
.file-item .fsize{color:var(--muted);font-size:12px;margin-left:8px}
.file-item button{background:none;border:none;color:var(--brand);cursor:pointer;font-size:16px}
.file-item .mv{background:#eef2ff;border-radius:6px;padding:2px 8px;font-size:12px;color:#3730a3;margin-left:6px;cursor:pointer}
.tool-options{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;margin:16px 0;display:grid;gap:12px}
.opt-row{display:flex;flex-direction:column;gap:6px}
.opt-row label{font-weight:600;font-size:14px}
.opt-row input[type=text],.opt-row input[type=password],.opt-row input[type=number],.opt-row select,.opt-row textarea{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:15px;max-width:420px}
.opt-row textarea{min-height:140px;max-width:100%;font-family:inherit}
.opt-row .hint{font-size:13px;color:var(--muted)}
.btn-primary{background:var(--brand);color:#fff;border:none;border-radius:10px;padding:14px 34px;font-size:16px;font-weight:700;cursor:pointer;margin:6px 0 20px}
.btn-primary:hover:not(:disabled){background:var(--brand-dark)}
.btn-primary:disabled{opacity:.45;cursor:not-allowed}
.progress{margin:10px 0 20px;background:#eef2ff;border-radius:10px;padding:14px}
.progress-bar{height:8px;background:#c7d2fe;border-radius:99px;width:0%;transition:width .2s;margin-bottom:8px}
.result{margin:0 0 24px}
.result .dl-card{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:var(--radius);padding:20px;text-align:center}
.result .dl-card h3{margin:0 0 10px;color:#166534}
.btn-download{display:inline-block;background:#16a34a;color:#fff;font-weight:700;padding:12px 30px;border-radius:10px}
.btn-download:hover{background:#15803d;text-decoration:none;color:#fff}
.error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;border-radius:10px;padding:12px 16px;margin:12px 0}
.tool-note{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 16px;font-size:14px;color:#92400e;margin:0 0 26px}

/* ads */
.ad-slot{margin:26px auto;text-align:center;max-width:1100px;padding:0 20px}
.ad-placeholder{background:var(--bg-soft);border:1px dashed #cbd5e1;border-radius:8px;color:#94a3b8;font-size:12px;letter-spacing:1px;padding:26px 10px;text-transform:uppercase}
.ad-leaderboard .ad-placeholder{min-height:90px}
.ad-incontent .ad-placeholder{min-height:120px}

/* features / faq */
.features{padding:40px 0}
.features h2,.faq h2{text-align:center;margin-bottom:22px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.feature{background:var(--bg-soft);border-radius:var(--radius);padding:20px}
.feature h3{margin:6px 0;font-size:16px}
.feature p{margin:0;font-size:14px;color:var(--muted)}
.faq{padding:20px 0 50px;max-width:760px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--border);border-radius:10px;padding:14px 18px;margin-bottom:10px}
.faq summary{font-weight:600;cursor:pointer}

/* static pages */
.page{max-width:780px;margin:0 auto;padding:30px 20px 60px}
.page h1{font-size:32px}
.page h2{font-size:20px;margin-top:28px}
.page p,.page li{color:#374151}

/* contact form */
.contact-form{display:grid;gap:12px;max-width:520px;margin-top:16px}
.contact-form input,.contact-form textarea{padding:12px;border:1px solid var(--border);border-radius:8px;font-size:15px;font-family:inherit}
.contact-form textarea{min-height:120px}

/* footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg-soft);margin-top:30px}
.footer-inner{display:flex;justify-content:space-between;gap:24px;padding:34px 20px;flex-wrap:wrap}
.footer-brand p{color:var(--muted);font-size:14px;max-width:320px}
.footer-nav{display:flex;gap:20px;flex-wrap:wrap;align-items:flex-start}
.footer-nav a{color:var(--muted);font-size:14px}
.footer-bottom{text-align:center;color:#9ca3af;font-size:13px;padding:0 20px 22px}

@media(max-width:640px){
  .main-nav{gap:14px;font-size:14px}
  .header-inner{height:56px}
  .hero{padding:36px 16px 20px}
}