/* Polished UI stylesheet */
:root{
  --bg:#eef2ff;
  --card:#ffffff;
  --muted:#6b7280;
  --accent:#3b82f6;
  --accent-2:#06b6d4;
  --danger:#ef4444;
  --radius:14px;
  --glass: rgba(255,255,255,0.6);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg,#f8fbff 0%,var(--bg) 100%);
  color:#0f172a;
  -webkit-font-smoothing:antialiased;
}
.site{max-width:1100px;margin:28px auto;padding:18px}
.header{display:flex;align-items:center;gap:18px;margin-bottom:20px}
.brand{display:flex;flex-direction:column}
.brand h1{margin:0;font-size:20px;letter-spacing:-0.2px}
.brand p{margin:0;color:var(--muted);font-size:13px}
.controls{margin-left:auto;display:flex;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;border:1px solid transparent;cursor:pointer;font-size:14px;transition:all .14s ease}
.btn-primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 6px 18px rgba(59,130,246,0.12);border:none}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:transparent;border:1px solid rgba(15,23,42,0.06);color:var(--muted)}
.search{width:320px;padding:10px 12px;border-radius:10px;border:1px solid rgba(15,23,42,0.06);background:#fff}
.card{background:var(--card);box-shadow:0 8px 30px rgba(2,6,23,0.06);border-radius:var(--radius);padding:18px}
.grid-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-top:18px}
.file-box{background:linear-gradient(180deg,#ffffff,#fbfdff);padding:14px;border-radius:12px;text-align:center;display:flex;flex-direction:column;gap:10px;align-items:center}
.file-thumb{width:120px;height:92px;border-radius:8px;object-fit:cover;background:linear-gradient(180deg,#f3f7ff,#fff);display:flex;align-items:center;justify-content:center;color:var(--muted);font-weight:600}
.file-name{font-weight:600;font-size:14px;color:#0b1220;word-break:anywhere}
.file-meta{font-size:12px;color:var(--muted)}
.download-button{display:inline-block;padding:8px 12px;border-radius:10px;background:var(--accent);color:#fff;text-decoration:none;border:none}
.download-button:hover{opacity:0.95}
.delete-button{padding:8px 10px;border-radius:8px;background:var(--danger);color:#fff;border:none}
.login-card{max-width:420px;margin:36px auto;padding:20px;border-radius:14px;background:var(--card);box-shadow:0 12px 38px rgba(2,6,23,0.08)}
form input[type=file]{width:100%}
.drop-area{border:2px dashed rgba(15,23,42,0.06);padding:18px;border-radius:12px;background:linear-gradient(180deg,rgba(255,255,255,0.8),rgba(255,255,255,0.6));text-align:center;cursor:pointer}
.drop-area.dragover{border-color:var(--accent);box-shadow:0 8px 30px rgba(59,130,246,0.06)}
.file-list{margin-top:10px;font-size:13px;color:var(--muted)}
.toast{position:fixed;right:20px;top:20px;padding:10px 14px;background:#0f172a;color:#fff;border-radius:10px;box-shadow:0 10px 30px rgba(2,6,23,0.18);display:none}
.message{color:green}
.error{color:var(--danger)}
/* Form rows and inputs */
.form-row{display:block;margin:12px 0}
.form-row label{display:block;margin-bottom:6px;color:var(--muted);font-size:14px}
.login-card input[type="text"], .login-card input[type="password"], .search, .login-card input[type="email"]{
  width:100%;padding:10px 12px;border-radius:10px;border:1px solid rgba(15,23,42,0.06);background:#fff;font-size:14px;outline:none;transition:box-shadow .12s, border-color .12s
}
.login-card input[type="text"]:focus, .login-card input[type="password"]:focus{box-shadow:0 6px 18px rgba(59,130,246,0.08);border-color:var(--accent)}
.login-card .hint{margin-top:8px;font-size:13px;color:var(--muted)}
.login-card .btn{width:auto}
@media (max-width:720px){.search{width:160px}.site{padding:12px}} 
@media (max-width:420px){.controls{flex-direction:column;align-items:flex-end;gap:8px}.search{width:100%}}