:root{
  --bg:#eef1f6; --card:#ffffff; --ink:#1a2233; --muted:#667085;
  --side:#121a2b; --side2:#1b2740; --acc:#22c55e; --acc2:#16a34a;
  --blue:#3b82f6; --danger:#ef4444; --line:#e4e9f2; --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font:16px/1.5 -apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif;min-height:100vh}

/* sidebar */
.sc-side{position:fixed;inset:0 auto 0 0;width:248px;background:linear-gradient(180deg,var(--side),var(--side2));color:#cbd5e1;display:flex;flex-direction:column;z-index:40}
.sc-brand{display:flex;align-items:center;gap:10px;padding:20px 18px;color:#fff;text-decoration:none;font-weight:800;font-size:20px;letter-spacing:.5px}
.sc-logo{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--acc),var(--blue));display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.sc-group{padding:14px 20px 6px;font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:#7d8aa5}
.sc-nav{display:flex;flex-direction:column;gap:2px;padding:0 10px}
.nav-link{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:10px;color:#cbd5e1;text-decoration:none;font-weight:600}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-link.active{background:rgba(34,197,94,.18);color:#fff;box-shadow:inset 2px 0 0 var(--acc)}
.nav-ico svg{width:20px;height:20px;display:block}
.sc-foot{margin-top:auto;padding:16px 20px;font-size:12px;color:#7d8aa5;border-top:1px solid rgba(255,255,255,.08)}

/* topbar (mobile) */
.sc-top{display:none;position:sticky;top:0;z-index:30;background:var(--side);color:#fff;padding:12px 14px;align-items:center;gap:12px}
.sc-burger{background:none;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:8px;font-size:18px;padding:4px 12px;cursor:pointer}
.sc-title{font-weight:700}
.sc-overlay{display:none}

/* main */
.sc-main{margin-left:248px;padding:32px 24px;max-width:860px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 6px 24px rgba(18,26,43,.07);overflow:hidden}
.card-h{padding:20px 22px 0}
.card-h h1{margin:0;font-size:22px}
.card-h p{margin:6px 0 0;color:var(--muted);font-size:14px}
.card-b{padding:20px 22px 22px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label.fl{display:block;font-size:13px;font-weight:700;margin:0 0 6px;color:#33415c}
input[type=text],input[type=url],input[type=password],textarea,select{width:100%;padding:12px;border:1.5px solid var(--line);border-radius:10px;font:inherit;background:#f8fafc}
input:focus,textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(59,130,246,.15)}
textarea.content{min-height:150px;resize:vertical}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:10px;padding:12px 20px;font:inherit;font-weight:700;cursor:pointer;text-decoration:none}
.btn-pri{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff}
.btn-pri:hover{filter:brightness(1.07)}
.btn-blue{background:var(--blue);color:#fff}
.btn-ghost{background:#eef2f7;color:var(--ink)}
.btn-block{width:100%}
.row-flex{display:flex;gap:10px}
.row-flex>*{flex:1}
.hint{color:var(--muted);font-size:13px;margin-top:12px}
.alert{border-radius:10px;padding:12px 14px;margin-top:14px;font-size:14px}
.alert-err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.alert-ok{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}
.result{margin-top:16px;border:1px dashed #b6c2d8;border-radius:10px;padding:14px;background:#f8fafc}
.qrbox{margin-top:12px;display:inline-block;padding:10px;background:#fff;border:1px solid var(--line);border-radius:10px}
.qrbox img{display:block}
.progress{height:12px;background:#e5eaf3;border-radius:99px;overflow:hidden;margin-top:12px}
.progress>div{height:100%;width:0%;border-radius:99px;background:linear-gradient(90deg,var(--acc),var(--blue));transition:width .15s;display:flex;align-items:center;justify-content:center;font-size:9px;font-weight:800;color:#fff}
.dropzone{border:2px dashed #b6c2d8;border-radius:var(--radius);background:#f8fafc;padding:36px 16px;text-align:center;color:var(--muted);font-weight:600;cursor:pointer}
.dropzone.over{border-color:var(--acc);background:#f0fdf4;color:var(--ink)}
.filerow{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;margin-top:8px;text-decoration:none;color:var(--ink);background:#f8fafc}
.filerow:hover{border-color:var(--blue);background:#fff}
.filerow-name{flex:1;font-weight:600;word-break:break-all}
.filerow-size{color:var(--muted);font-size:13px;white-space:nowrap}
.picklist{margin:8px 0 0;padding-left:20px;font-size:13px;color:#33415c}
.share-row{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.btn-wa{background:#25D366;color:#fff;flex:1}
.btn-mail{background:#64748b;color:#fff;flex:1}
pre.preview{background:#0f172a;color:#dbe7ff;border-radius:10px;padding:12px;font-size:12px;max-height:220px;overflow:auto;white-space:pre-wrap;word-break:break-all;margin-top:8px}
.count{font-size:64px;font-weight:800;text-align:center;margin:8px 0}
.center{text-align:center}
.big-emoji{font-size:44px}
.stat{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.stat span{background:#eef2f7;border-radius:99px;padding:4px 12px;font-size:12px;font-weight:700}

@media (max-width:900px){
  .sc-side{transform:translateX(-100%);transition:transform .2s}
  .sc-side.open{transform:none}
  .sc-top{display:flex}
  .sc-main{margin-left:0;padding:18px 14px}
  .sc-overlay.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:35}
  .grid2{grid-template-columns:1fr}
}