:root{
  --bg:#050505;
  --panel:#101114;
  --panel-2:#15171c;
  --line:#252830;
  --text:#f5f7fb;
  --muted:#8f96a3;
  --blue:#0088ff;
  --green:#4bd17b;
  --red:#ff5d67;
  --amber:#f5b942;
  --radius:18px;
}

*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
button,input{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}

.login-shell{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
  background:
    radial-gradient(circle at 50% 0%,rgba(0,136,255,.13),transparent 30%),
    #050505;
}

.login-card{
  width:min(440px,100%);
  padding:32px;
  border:1px solid var(--line);
  background:rgba(16,17,20,.92);
  border-radius:24px;
  box-shadow:0 28px 80px rgba(0,0,0,.55);
}

.brand-mark{
  width:52px;height:52px;border-radius:16px;
  display:grid;place-items:center;
  background:var(--blue);color:white;font-weight:900;
  margin-bottom:24px;
}
.brand-mark.small{width:38px;height:38px;border-radius:12px;margin:0}

.eyebrow{font-size:11px;letter-spacing:.14em;color:#7faee0;font-weight:800}
h1,h2,p{margin-top:0}
.login-card h1{font-size:30px;margin:8px 0}
.login-card p,.panel p,.toolbar p{color:var(--muted);margin-bottom:20px}

.field-label{display:block;font-size:12px;color:var(--muted);margin:24px 0 8px}

.input{
  width:100%;height:44px;border-radius:12px;padding:0 14px;
  border:1px solid var(--line);background:#0b0c0f;color:white;outline:none;
}
.input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,136,255,.12)}
.login-card .btn{width:100%;margin-top:12px}

.btn{
  height:40px;padding:0 16px;border-radius:11px;border:1px solid transparent;
  font-weight:750;color:white;background:#1b1e24;
}
.btn.primary{background:var(--blue)}
.btn.ghost{border-color:var(--line);background:#121419}
.btn.danger{background:rgba(255,93,103,.12);border-color:rgba(255,93,103,.24);color:#ff7f87}
.btn:disabled{opacity:.5;cursor:not-allowed}

.message{min-height:20px;margin-top:12px;color:#ff7f87;font-size:13px}

.app-shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}

.sidebar{
  position:sticky;top:0;height:100vh;
  border-right:1px solid var(--line);
  background:#090a0c;padding:20px 14px;
  display:flex;flex-direction:column;
}
.brand{display:flex;gap:12px;align-items:center;padding:4px 8px 24px}
.brand strong{display:block;font-size:14px}
.brand span{font-size:12px;color:var(--muted)}

.nav{display:flex;flex-direction:column;gap:6px}
.nav-item{
  text-align:left;border:0;border-radius:11px;padding:11px 12px;
  background:transparent;color:var(--muted);font-weight:650;
}
.nav-item:hover,.nav-item.active{background:#15171b;color:white}
.nav-item.active{box-shadow:inset 3px 0 0 var(--blue)}
.nav-item.danger{color:#ff777f}
.sidebar-bottom{margin-top:auto}

.main{padding:28px 32px 48px;min-width:0}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.topbar h1{margin:5px 0 0;font-size:30px}

.page{display:none}
.page.active{display:block}

.stats-grid{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-bottom:18px;
}
.stat{
  padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
}
.stat span{display:block;color:var(--muted);font-size:12px;margin-bottom:12px}
.stat strong{font-size:28px}

.panel-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
.panel{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
  overflow:hidden;
}
.panel-head{padding:18px 18px 0}
.panel-head h2,.toolbar h2{margin-bottom:5px;font-size:17px}
.panel-head p{font-size:12px}

.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px}
.toolbar.between{justify-content:space-between}
.toolbar .search{max-width:420px}

.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:850px}
th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);font-size:12px;vertical-align:middle}
th{color:#7f8794;font-weight:700;background:#0c0d10;position:sticky;top:0}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#13151a}
.link-btn{background:none;border:0;color:#8fc8ff;padding:0;font-weight:700}

.badge{
  display:inline-flex;align-items:center;min-height:25px;padding:0 9px;
  border-radius:999px;font-size:10px;font-weight:850;letter-spacing:.03em;
}
.badge.preview{background:#1d2026;color:#aab0ba}
.badge.courses{background:rgba(0,136,255,.12);color:#4daaff}
.badge.full{background:rgba(75,209,123,.12);color:#69dc91}
.badge.suspended{background:rgba(255,93,103,.12);color:#ff777f}
.badge.unused{background:rgba(245,185,66,.12);color:#f5c35f}
.badge.used{background:rgba(75,209,123,.12);color:#69dc91}
.badge.expired{background:#202227;color:#9096a0}

.empty{padding:28px;text-align:center;color:var(--muted);font-size:13px}
.mini-list{padding:0 18px 14px}
.mini-row{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:12px}
.mini-row:last-child{border-bottom:0}
.mini-row span{color:var(--muted)}

.new-code{
  padding:16px 18px;margin-bottom:16px;border-radius:14px;
  border:1px solid rgba(0,136,255,.28);background:rgba(0,136,255,.09);
}
.new-code code{font-size:18px;color:#6bbaff;font-weight:850}

.modal{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:24px}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(5px)}
.modal-card{
  position:relative;width:min(620px,100%);max-height:86vh;overflow:auto;
  border:1px solid var(--line);border-radius:22px;background:#0d0f12;
  box-shadow:0 40px 100px rgba(0,0,0,.7);padding:22px;
}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:18px}
.modal-head h2{margin:5px 0 0}
.icon-btn{border:0;background:#17191e;color:white;width:36px;height:36px;border-radius:50%;font-size:22px}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.detail{
  padding:13px;border-radius:12px;background:#14161a;border:1px solid #202329;
}
.detail span{display:block;color:var(--muted);font-size:10px;margin-bottom:5px}
.detail strong{font-size:13px;word-break:break-word}
.modal-actions{display:flex;gap:10px;margin-top:18px}
.modal-actions .btn{flex:1}

@media(max-width:1100px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .panel-grid{grid-template-columns:1fr}
}
@media(max-width:760px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto}
  .nav{display:grid;grid-template-columns:repeat(2,1fr)}
  .sidebar-bottom{margin-top:10px}
  .main{padding:22px 16px}
  .stats-grid{grid-template-columns:1fr 1fr}
}


/* ================================
   Admin V2 — Banners
   ================================ */
.banner-form-panel{margin-bottom:16px}
.banner-form{padding:20px;display:flex;flex-direction:column;gap:14px}
.banner-form label>span{display:block;font-size:12px;color:var(--muted);margin-bottom:7px}
.banner-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.toggle-row{
  min-height:44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#0b0c0f;
}
.toggle-row span{margin:0!important}
.toggle-row input{width:18px;height:18px;accent-color:var(--blue)}
.banner-preview{
  border-radius:14px;
  border:1px solid var(--line);
  overflow:hidden;
  background:#08090b;
}
.banner-preview img{
  display:block;
  width:100%;
  max-height:260px;
  object-fit:contain;
}
.form-actions{display:flex;gap:10px;justify-content:flex-end}
.banner-thumb{
  width:120px;
  height:48px;
  border-radius:9px;
  object-fit:cover;
  border:1px solid var(--line);
  background:#07080a;
}
.row-actions{display:flex;gap:8px}
.small-btn{
  border:1px solid var(--line);
  background:#15171b;
  color:white;
  height:30px;
  padding:0 10px;
  border-radius:8px;
  font-size:11px;
  font-weight:700;
}
.small-btn.delete{color:#ff777f;border-color:rgba(255,93,103,.22);background:rgba(255,93,103,.08)}
.status-dot{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:11px;
  font-weight:700;
}
.status-dot:before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:#68707d;
}
.status-dot.active:before{background:var(--green)}
@media(max-width:760px){
  .banner-form-grid{grid-template-columns:1fr}
}


/* Admin V3 — direct banner image upload */
.upload-box{
  min-height:150px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:7px;
  padding:18px;
  border:1px dashed #343943;
  border-radius:14px;
  background:#0b0c0f;
  text-align:center;
  cursor:pointer;
  transition:border-color .18s ease, background .18s ease;
}
.upload-box:hover,
.upload-box.dragover{
  border-color:var(--blue);
  background:rgba(0,136,255,.06);
}
.upload-box.uploading{
  opacity:.65;
  pointer-events:none;
}
.upload-icon{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(0,136,255,.12);
  color:#55adff;
  font-size:22px;
  font-weight:900;
}
.upload-box strong{font-size:14px}
.upload-box small{font-size:11px;color:var(--muted)}
.upload-box .btn{margin-top:6px}
.upload-url{margin-top:9px;color:#79bbff}