:root{
  --bg:#0d0d0d;
  --bg-1:#070708;
  --bg-2:#0f1113;
  --card:rgba(18,18,18,.4);
  --card-border:rgba(255,255,255,.05);
  --card-border-hover:rgba(255,255,255,.1);
  --glass:rgba(255,255,255,.03);
  --text:#fff;
  --text-dim:rgba(255,255,255,.55);
  --text-faint:rgba(255,255,255,.35);
  --accent:#6366f1;
  --accent-hover:#5558e3;
  --accent-start:#7c7fff;
  --accent-end:#00d4ff;
  --accent-soft:rgba(99,102,241,.16);
  --danger:#f04747;
  --success:#22c55e;
  --radius:16px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:#0d0d0d;
  color:var(--text);
  font-family:'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  overflow-x:hidden;
  position:relative;
}
body::before{
  content:'';
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(circle at 20% 50%, rgba(120,119,198,.10) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(99,102,241,.10) 0%, transparent 50%);
}

a{color:inherit;text-decoration:none;}

@keyframes fadeInUp{
  from{opacity:0;transform:translateY(20px);}
  to{opacity:1;transform:translateY(0);}
}

.navbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 40px;
  border-bottom:1px solid rgba(255,255,255,.05);
  background:rgba(13,13,13,.45);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  position:sticky;
  top:0;
  z-index:120;
}
.brand{font-size:1.3rem;font-weight:700;letter-spacing:-.5px;}
.brand span{color:var(--accent);}
.nav-links{display:flex;align-items:center;gap:12px;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 18px;
  border-radius:10px;
  font-weight:600;
  font-size:.92rem;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .2s cubic-bezier(.4,0,.2,1);
  font-family:'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);transform:translateY(-1px);}
.btn-outline{background:transparent;border-color:rgba(255,255,255,.12);color:rgba(255,255,255,.7);}
.btn-outline:hover{border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;}
.btn-danger{background:transparent;border-color:rgba(240,71,71,.35);color:var(--danger);}
.btn-danger:hover{background:rgba(240,71,71,.1);}
.btn-block{width:100%;}
.btn:disabled{opacity:.4;cursor:not-allowed;}

.container{max-width:1100px;margin:0 auto;padding:0 24px;width:100%;position:relative;z-index:1;}
.center-page{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:90px 20px 50px;
  position:relative;
  z-index:1;
}

.hero h1{
  font-size:3.5rem;
  font-weight:700;
  letter-spacing:-2px;
  margin:0 0 16px;
  background:linear-gradient(135deg,#fff 0%, rgba(255,255,255,.65) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  animation:fadeInUp .6s ease-out;
}
.hero p{color:var(--text-dim);font-size:1.1rem;margin:0 0 40px;animation:fadeInUp .6s ease-out .1s backwards;}

.card{
  background:var(--card);
  backdrop-filter:blur(20px);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:32px;
  animation:fadeInUp .6s ease-out .2s backwards;
}
.panel{
  background:var(--card);
  backdrop-filter:blur(20px);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:28px;
}
.card-title{font-size:1.3rem;font-weight:700;margin:0 0 20px;}

label{display:block;font-size:.85rem;color:var(--text-dim);margin-bottom:6px;font-weight:600;}
input[type=text],input[type=email],input[type=password],input[type=file]{
  width:100%;
  background:rgba(0,0,0,.4);
  border:1.5px solid rgba(255,255,255,.08);
  color:var(--text);
  padding:12px 14px;
  border-radius:12px;
  font-size:.95rem;
  outline:none;
  transition:.2s;
  font-family:'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
}
input[type=text]:focus,input[type=email]:focus,input[type=password]:focus{
  border-color:rgba(99,102,241,.55);
  background:rgba(0,0,0,.5);
  box-shadow:0 0 0 3px var(--accent-soft);
}
.field{margin-bottom:18px;}
.input-group{
  display:flex;
  align-items:stretch;
  background:rgba(0,0,0,.4);
  border:1.5px solid rgba(255,255,255,.08);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .2s, box-shadow .2s, background .2s;
}
.input-group:focus-within{
  border-color:rgba(99,102,241,.55);
  background:rgba(0,0,0,.5);
  box-shadow:0 0 0 3px var(--accent-soft);
}
.input-group .prefix{
  padding:12px 14px;
  color:var(--text-faint);
  font-size:.95rem;
  border-right:1px solid rgba(255,255,255,.08);
  white-space:nowrap;
}
.input-group input{border:none;background:transparent;border-radius:0;box-shadow:none !important;}
.input-group input:focus{box-shadow:none;}

.auth-wrap{width:100%;max-width:400px;position:relative;z-index:1;}
.auth-wrap .card{text-align:left;}
.auth-switch{margin-top:18px;color:var(--text-dim);font-size:.9rem;}
.auth-switch a{color:var(--accent);font-weight:600;}
.error-text{color:var(--danger);font-size:.85rem;margin:-8px 0 16px;}

.flash{
  max-width:600px;
  margin:16px auto 0;
  padding:12px 18px;
  border-radius:10px;
  font-size:.9rem;
  text-align:center;
  position:relative;
  z-index:1;
}
.flash-success{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#4ade80;}
.flash-error{background:rgba(240,71,71,.1);border:1px solid rgba(240,71,71,.3);color:#f87171;}

.features{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));
  gap:24px;
  margin-top:60px;
  max-width:1100px;
  position:relative;
  z-index:1;
}
.feature-card{
  background:var(--card);
  backdrop-filter:blur(20px);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:32px 24px;
  text-align:center;
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.feature-card:hover{
  background:rgba(18,18,18,.6);
  border-color:var(--card-border-hover);
  transform:translateY(-4px);
}
.feature-icon{
  width:56px;height:56px;
  display:inline-grid;
  place-items:center;
  background:var(--accent-soft);
  border:1px solid rgba(255,255,255,.08);
  border-radius:12px;
  margin:0 auto 16px;
  font-size:1.4rem;
  opacity:.95;
}
.feature-card h3{margin:0 0 8px;font-size:1.05rem;font-weight:600;letter-spacing:-.3px;}
.feature-card p{color:var(--text-dim);font-size:.88rem;margin:0;line-height:1.5;}

.dash-wrap{flex:1;padding:36px 24px;position:relative;z-index:1;}
.dash-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;}
.dash-header h1{font-size:1.6rem;margin:0;font-weight:700;letter-spacing:-.5px;}
.dash-header p{color:var(--text-dim);margin:4px 0 0;font-size:.9rem;}

.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-bottom:28px;
}
.stat-card{
  background:var(--card);
  backdrop-filter:blur(20px);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:20px;
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.stat-card:hover{border-color:var(--card-border-hover);transform:translateY(-2px);}
.stat-card .label{color:var(--text-dim);font-size:.78rem;text-transform:uppercase;letter-spacing:.5px;}
.stat-card .value{font-size:1.7rem;font-weight:800;margin-top:6px;}
.stat-card .value.accent{
  background:linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.upload-panel{margin-bottom:28px;}
.dropzone{
  border:2px dashed rgba(255,255,255,.1);
  border-radius:var(--radius);
  padding:40px 20px;
  text-align:center;
  cursor:pointer;
  transition:.2s;
  background:rgba(255,255,255,.015);
}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:var(--accent-soft);}
.dropzone .dz-icon{font-size:2rem;margin-bottom:10px;}
.dropzone .dz-text{color:var(--text-dim);font-size:.9rem;}
.dropzone .dz-filename{margin-top:10px;font-weight:600;color:var(--accent);}
#fileInput{display:none;}
.progress-bar{
  width:100%;height:8px;background:rgba(255,255,255,.06);border-radius:6px;overflow:hidden;margin-top:16px;display:none;
}
.progress-bar > div{height:100%;width:0;background:linear-gradient(90deg, var(--accent-start), var(--accent-end));transition:width .2s;}

table.files-table{width:100%;border-collapse:collapse;font-size:.9rem;}
.files-table th{
  text-align:left;color:var(--text-faint);font-weight:600;font-size:.78rem;
  text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;border-bottom:1px solid var(--card-border);
}
.files-table td{padding:14px;border-bottom:1px solid var(--card-border);vertical-align:middle;}
.files-table tr:last-child td{border-bottom:none;}
.files-table tr:hover td{background:rgba(255,255,255,.02);}
.file-name{font-weight:600;}
.file-meta{color:var(--text-faint);font-size:.8rem;}
.short-link{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(0,0,0,.4);border:1px solid var(--card-border);
  padding:6px 10px;border-radius:8px;font-size:.82rem;color:var(--accent);
}
.copy-btn{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:.85rem;}
.copy-btn:hover{color:var(--text);}
.empty-state{text-align:center;padding:60px 20px;color:var(--text-dim);}

.download-card{max-width:460px;}
.file-icon-big{
  width:64px;height:64px;border-radius:16px;background:var(--accent-soft);
  border:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin:0 auto 18px;
}
.download-card h2{margin:0 0 6px;font-size:1.25rem;word-break:break-word;}
.download-card .file-info{color:var(--text-dim);font-size:.88rem;margin-bottom:24px;}
.download-card .btn-primary{padding:14px 30px;font-size:1rem;width:100%;}

.site-footer{
  background:rgba(10,10,10,.4);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  color:var(--text-dim);
  padding:44px 20px 22px;
  border-top:1px solid rgba(255,255,255,.05);
  position:relative;
  z-index:1;
}
.footer-inner{
  max-width:1100px;
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(220px,1fr));
  gap:28px;
  align-items:start;
}
.footer-col h4{color:#fff;font-size:15px;margin:0 0 12px;font-weight:600;}
.footer-col .brand{color:#fff;margin:0 0 8px;font-size:18px;font-weight:700;}
.footer-col .tagline{color:var(--text-dim);font-size:14px;line-height:1.5;max-width:320px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:8px;font-size:14px;}
.footer-col a{color:var(--text-dim);text-decoration:none;position:relative;transition:color .18s ease;}
.footer-col a:hover{color:#cfcfd6;}
.social-links{display:flex;gap:10px;align-items:center;}
.social-btn{
  display:inline-grid;place-items:center;width:40px;height:40px;border-radius:999px;
  background:var(--glass);color:#cfcfd6;border:1px solid rgba(255,255,255,.03);
  transition:transform .15s ease, background .15s ease, color .15s ease;
  font-size:16px;
}
.social-btn:hover{
  transform:translateY(-4px) scale(1.04);
  background:linear-gradient(135deg, rgba(124,127,255,.12), rgba(0,212,255,.06));
  color:#fff;
}
.footer-bottom{
  max-width:1100px;margin:22px auto 0;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.02);color:#9a9aa0;font-size:13px;text-align:center;
}

.back-to-top{
  position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:10px;
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.04);color:var(--text-dim);
  display:grid;place-items:center;font-size:14px;cursor:pointer;
  transition:transform .18s ease, opacity .18s ease;opacity:0;pointer-events:none;z-index:60;
}
.back-to-top.show{opacity:1;pointer-events:auto;}
.back-to-top:hover{transform:translateY(-4px);color:#cfcfd6;}

@media(max-width:800px){
  .features{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .hero h1{font-size:2.2rem;}
  .navbar{padding:12px 16px;}
  .files-table{display:block;overflow-x:auto;white-space:nowrap;}
}