:root{
  --navy:#0A2540; --navy-2:#11314F; --aqua:#00C2CC; --aqua-ink:#062033;
  --ink:#132C47; --muted:#5E7186; --line:#DFE8F1; --ground:#F6F9FC; --card:#FFFFFF;
}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit}
main{max-width:1080px;margin:0 auto;padding:0 16px}

.site-nav{display:flex;align-items:center;gap:22px;padding:14px 22px;background:var(--navy)}
.brand{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;font-size:19px;text-decoration:none}
.nav-links{display:flex;gap:18px}
.nav-links a{color:#B9C9DB;text-decoration:none;font-size:13.5px;font-weight:600}
.nav-links a:hover{color:#fff}
.nav-auth{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-auth a{color:#B9C9DB;text-decoration:none;font-size:13.5px;font-weight:600}
.linklike{background:none;border:0;color:#B9C9DB;font:600 13.5px system-ui,sans-serif;cursor:pointer;padding:0}

.btn-accent{background:var(--aqua);color:var(--aqua-ink);font-weight:700;text-decoration:none;
  border:0;border-radius:9px;padding:9px 16px;font-size:13.5px;cursor:pointer;display:inline-block}
.btn-primary{background:var(--navy);color:#fff;font-weight:700;border:0;border-radius:9px;
  padding:9px 16px;font-size:13.5px;cursor:pointer}
.btn-primary:disabled{opacity:.45;cursor:not-allowed}
.big{padding:13px 28px;font-size:15px;border-radius:11px}

.hero{background:var(--navy);color:#fff;text-align:center;padding:46px 18px 42px;
  margin:0 -16px}
.hero h1{font-size:clamp(26px,4vw,38px);line-height:1.15;margin:0 0 12px}
.hero p{color:#AFC2D6;max-width:56ch;margin:0 auto}

.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;padding:30px 0 40px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 16px;
  text-decoration:none;transition:border-color .15s}
.tool-card:hover{border-color:var(--aqua)}
.tool-card b{display:block;margin-bottom:4px}
.tool-card span{color:var(--muted);font-size:12.5px;line-height:1.4;display:block}

.tool-page{max-width:640px;margin:0 auto;padding:36px 0 60px;text-align:center}
.tool-page h1{font-size:clamp(24px,3.4vw,32px);margin:0 0 6px}
.tagline{color:var(--muted);margin:0 0 24px}
.drop{background:var(--card);border:2px dashed #9DB4CB;border-radius:16px;padding:34px 20px;margin-bottom:18px}
.drop.dragover{border-color:var(--aqua);background:#EDFBFC}
.drop small{display:block;margin-top:12px;color:var(--muted)}
#file-list{list-style:none;margin:12px 0 0;padding:0;font-size:13px;color:var(--ink)}
#file-list li{padding:2px 0}
.opt{display:block;text-align:left;font-weight:600;font-size:13.5px;margin:0 0 14px}
.opt input,.opt select{display:block;width:100%;margin-top:5px;padding:10px 12px;font-size:14px;
  border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink)}
.bar{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin:26px 0 10px}
.bar i{display:block;height:100%;width:0;background:var(--aqua);transition:width .2s}
.done-msg{font-weight:700;font-size:17px}
.limit-msg{font-weight:600}
.error-msg{color:#B3261E;font-size:13.5px}

.auth-card{max-width:400px;margin:40px auto;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:28px 26px}
.auth-card h1{margin:0 0 4px;font-size:24px}
.auth-card label{display:block;font-weight:600;font-size:13.5px;margin:14px 0}
.auth-card input{display:block;width:100%;margin-top:5px;padding:10px 12px;font-size:14px;
  border:1px solid var(--line);border-radius:9px}
.auth-card button{width:100%;margin-top:18px}

.files{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:12px}
.files th,.files td{padding:10px 12px;border-bottom:1px solid var(--line);font-size:13.5px;text-align:left}

.site-foot{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;
  background:var(--navy);color:#8FA9C2;font-size:12.5px;padding:16px 22px;margin-top:40px}
@media (max-width:680px){.nav-links{display:none}}