:root{
  --bg1:#0d0b21;
  --bg2:#2a2359;
  --bg3:#1b1a35;
  --accent:#7f5af0;
  --accent2:#2cb67d;
  --danger:#ff4d6d;
  --warn:#ffb703;
  --card:#161029cc;
  --card-solid:#181233;
  --text:#f6f4ff;
  --muted:#a9a3c4;
  --radius:16px;
  --border:#ffffff14;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'Inter','Segoe UI',Roboto,Arial,sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, #7f5af022, transparent 60%),
    radial-gradient(900px 500px at 110% 10%, #2cb67d1a, transparent 55%),
    linear-gradient(135deg,var(--bg1),var(--bg2) 50%,var(--bg3));
  background-size:auto,auto,300% 300%;
  animation:bgmove 20s ease infinite;
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
@keyframes bgmove{
  0%{background-position:0 0,0 0,0% 50%}
  50%{background-position:0 0,0 0,100% 50%}
  100%{background-position:0 0,0 0,0% 50%}
}

/* ---------- ICON SYSTEM (SVG trắng vẽ bằng code, không dùng emoji) ---------- */
.icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;flex:none;
  background:
    radial-gradient(circle at 30% 20%, #ffffff14, transparent 60%),
    linear-gradient(160deg,#1c1533,#0a0714 65%);
  box-shadow:
    0 0 0 1px currentColor4d,
    0 0 0 1px #00000090 inset,
    0 2px 6px -2px #000000cc,
    0 0 14px -5px currentColor;
  transition:.25s transform,.25s box-shadow;
}
.icon:hover{
  transform:translateY(-3px) scale(1.07);
  box-shadow:
    0 0 0 1px currentColor80,
    0 0 0 1px #00000090 inset,
    0 4px 10px -3px #000000dd,
    0 0 22px -3px currentColor;
}
.icon svg{filter:drop-shadow(0 0 4px currentColor)}
.icon.i-key{color:var(--warn)}
.icon.i-admin{color:var(--accent)}
.icon.i-user{color:var(--accent2)}
.icon.i-danger{color:var(--danger)}
.icon.i-check{color:var(--accent2)}
.icon.i-clock{color:#5bc0ff}
.icon.i-fire{color:#ff7849}
.icon.i-crown{color:#ffd166}
.icon.i-lock{color:#ff6b9d}
.icon.i-api{color:#5bc0ff}
.icon.sm{width:27px;height:27px;border-radius:9px}
.icon.sm svg{width:13px;height:13px;stroke-width:2.4}

/* icon "trần" dùng inline trong nút / badge / text, không có khung */
.ic{display:inline-block;vertical-align:-3px;flex:none}
.btn .ic{vertical-align:-2px}
.badge .ic{vertical-align:-2px}

/* ---------- LAYOUT AUTH (login/register) ---------- */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px;position:relative;overflow:hidden;
}
.auth-wrap::before,.auth-wrap::after{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,var(--accent) 0%,transparent 70%);
  opacity:.25;filter:blur(10px);animation:float 12s ease-in-out infinite;
}
.auth-wrap::before{top:-150px;left:-150px}
.auth-wrap::after{bottom:-150px;right:-150px;background:radial-gradient(circle,var(--accent2) 0%,transparent 70%);animation-delay:3s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(30px)}}

.auth-card{
  width:100%;max-width:420px;background:var(--card);
  backdrop-filter:blur(18px);border:1px solid #ffffff1a;
  border-radius:var(--radius);padding:38px 34px;
  box-shadow:0 20px 60px -20px #000000aa;
  position:relative;z-index:2;
  animation:slideUp .55s cubic-bezier(.2,.8,.2,1);
}
@keyframes slideUp{from{opacity:0;transform:translateY(28px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}

.auth-logo{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.auth-logo .icon{width:48px;height:48px;border-radius:14px}
.auth-logo .icon svg{width:22px;height:22px}
.auth-title{font-size:22px;font-weight:800;letter-spacing:.3px}
.auth-sub{color:var(--muted);font-size:13px;margin:6px 0 26px}

.field{margin-bottom:16px}
.field label{font-size:12.5px;color:var(--muted);display:block;margin-bottom:6px;font-weight:600}
.field input,.field select{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid #ffffff1f;
  background:#0f0b23;color:var(--text);font-size:14px;outline:none;
  transition:.2s border-color,.2s box-shadow;
}
.field input[type="file"]{
  padding:10px 12px;cursor:pointer;
}
.field input[type="file"]::file-selector-button{
  padding:6px 12px;background:linear-gradient(135deg,var(--accent),#9b6bff);
  border:none;border-radius:6px;color:#fff;font-weight:600;cursor:pointer;
  margin-right:8px;transition:.2s background;
}
.field input[type="file"]::file-selector-button:hover{
  background:linear-gradient(135deg,#9b6bff,#b385ff);
}
.field select{
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  padding-right:38px;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a9a3c4' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 13px center;
  background-size:13px;
}
.field input:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7f5af033}
.field select:focus{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237f5af0' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
}
.field select::-ms-expand{display:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:13px 18px;border:none;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),#9b6bff);
  color:#fff;font-weight:700;font-size:14.5px;cursor:pointer;
  box-shadow:0 10px 24px -8px #7f5af088;
  transition:.2s transform,.2s box-shadow,.2s filter;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 28px -8px #7f5af0aa;filter:brightness(1.06)}
.btn:active{transform:translateY(0)}
.btn.btn-danger{background:linear-gradient(135deg,var(--danger),#ff7a90);box-shadow:0 10px 24px -8px #ff4d6d88}
.btn.btn-outline{background:#ffffff08;border:1px solid #ffffff2a;box-shadow:none}
.btn.btn-outline:hover{background:#ffffff14}
.btn.btn-sm{width:auto;padding:8px 14px;font-size:13px;border-radius:8px}
.btn .ic,.btn svg{flex:none}

.auth-foot{text-align:center;margin-top:18px;font-size:13px;color:var(--muted)}
.auth-foot a{color:var(--accent);text-decoration:none;font-weight:600}

.alert{padding:12px 14px;border-radius:10px;font-size:13.5px;margin-bottom:16px;display:flex;gap:8px;align-items:center}
.alert-error{background:#ff4d6d1f;border:1px solid #ff4d6d44;color:#ffb3c1}
.alert-ok{background:#2cb67d1f;border:1px solid #2cb67d44;color:#b7f5d8}

/* ---------- ADMIN SHELL ---------- */
.shell{display:flex;min-height:100vh}
.sidebar{
  width:250px;background:var(--card-solid);border-right:1px solid #ffffff12;
  padding:24px 18px;position:sticky;top:0;height:100vh;
  display:flex;flex-direction:column;gap:6px;
}
.sidebar .brand{display:flex;align-items:center;gap:10px;margin-bottom:26px;padding:0 6px}
.sidebar .brand b{font-size:16px;letter-spacing:.2px}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:10px;
  color:var(--muted);text-decoration:none;font-size:14px;font-weight:600;
  transition:.18s background,.18s color,.18s transform;
}
.nav-item:hover{background:#ffffff0c;color:var(--text);transform:translateX(2px)}
.nav-item.active{background:linear-gradient(135deg,#7f5af033,#2cb67d22);color:#fff;box-shadow:inset 0 0 0 1px #7f5af055}
.nav-item.active .icon{box-shadow:0 0 0 1px currentColor80,0 0 0 1px #00000090 inset,0 0 16px -2px currentColor}
.sidebar-foot{margin-top:auto;padding-top:14px;border-top:1px solid #ffffff12;font-size:12px;color:var(--muted)}
.sidebar-foot a{display:inline-flex;align-items:center;gap:7px;margin-top:8px}

.main{flex:1;padding:28px 34px;max-width:1400px}
.topbar{
  display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;
  flex-wrap:wrap;gap:12px;padding-bottom:18px;border-bottom:1px solid #ffffff0f;
}
.topbar h1{font-size:22px;font-weight:800;display:flex;align-items:center;gap:12px}
.topbar .who{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:8px}

.grid-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-bottom:26px}
.stat-card{
  background:var(--card);border:1px solid #ffffff14;border-radius:var(--radius);
  padding:18px;display:flex;align-items:center;gap:14px;
  animation:slideUp .5s ease both;
  transition:.2s transform,.2s border-color;
}
.stat-card:hover{transform:translateY(-3px);border-color:#ffffff2a}
.stat-card .num{font-size:23px;font-weight:800;line-height:1.1}
.stat-card .lbl{font-size:12.5px;color:var(--muted);margin-top:2px}

.card{
  background:var(--card);border:1px solid #ffffff14;border-radius:var(--radius);
  padding:22px;margin-bottom:22px;animation:slideUp .5s ease both;
  backdrop-filter:blur(10px);
}
.card h2{font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:10px;font-weight:700}

.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;align-items:end}
.form-row .btn{align-self:start}

table{width:100%;border-collapse:collapse;font-size:13.5px}
thead th{
  text-align:left;color:var(--muted);font-weight:700;font-size:12px;
  text-transform:uppercase;letter-spacing:.4px;padding:10px 12px;border-bottom:1px solid #ffffff1a;
}
tbody td{padding:12px;border-bottom:1px solid #ffffff0d;vertical-align:middle}
tbody tr{transition:.15s background}
tbody tr:hover{background:#ffffff08}
.key-code{font-family:'Consolas',monospace;font-weight:700;letter-spacing:.5px;background:#0000002e;padding:4px 8px;border-radius:6px;border:1px solid #ffffff0f}

.badge{padding:5px 11px;border-radius:20px;font-size:11.5px;font-weight:700;display:inline-flex;align-items:center;gap:6px;border:1px solid transparent}
.badge-active{background:#2cb67d1c;color:#5be3a4;border-color:#2cb67d3a}
.badge-banned{background:#ff4d6d1c;color:#ff8fa3;border-color:#ff4d6d3a}
.badge-expired{background:#ffb7031c;color:#ffd166;border-color:#ffb7033a}
.badge-lifetime{background:#7f5af01c;color:#c3a9ff;border-color:#7f5af03a}

.copy-btn{
  cursor:pointer;background:#ffffff0a;border:1px solid #ffffff14;color:var(--muted);
  width:28px;height:28px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;
  transition:.18s background,.18s color,.18s border-color;
}
.copy-btn:hover{color:var(--text);background:#ffffff16;border-color:#ffffff2a}

/* Slide tab switch hiệu ứng mượt (login/register) */
.tabs{display:flex;background:#0f0b23;border-radius:12px;padding:4px;margin-bottom:22px;position:relative}
.tabs button{
  flex:1;padding:10px;border:none;background:transparent;color:var(--muted);
  font-weight:700;font-size:13.5px;border-radius:9px;cursor:pointer;z-index:2;transition:.2s color;
}
.tabs button.active{color:#fff}
.tabs .slider{
  position:absolute;top:4px;bottom:4px;left:4px;width:calc(50% - 4px);
  background:linear-gradient(135deg,var(--accent),#9b6bff);border-radius:9px;
  transition:transform .32s cubic-bezier(.2,.8,.2,1);z-index:1;
}
.tab-panels{position:relative;overflow:hidden}
.tab-panel{animation:fadeSlide .35s ease}
@keyframes fadeSlide{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:translateX(0)}}

.toast{
  position:fixed;bottom:24px;right:24px;background:var(--card-solid);
  border:1px solid #ffffff22;padding:13px 18px;border-radius:12px;
  display:flex;align-items:center;gap:10px;box-shadow:0 12px 30px -10px #000a;
  animation:toastIn .35s ease, toastOut .35s ease 2.6s forwards;z-index:999;
  font-size:13.5px;font-weight:600;
}
.toast svg{color:var(--accent2);flex:none}
@keyframes toastIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes toastOut{to{opacity:0;transform:translateY(20px)}}

::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#ffffff22;border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:#ffffff38}
::-webkit-scrollbar-track{background:transparent}

/* Nút menu mobile: ẩn trên desktop, chỉ hiện khi màn hình nhỏ */
#burger{display:none}

/* Lớp phủ tối phía sau sidebar khi mở trên mobile, chạm ra ngoài để đóng lại */
.sidebar-overlay{
  display:none;position:fixed;inset:0;background:#00000070;
  z-index:45;opacity:0;transition:.25s opacity;
}

@media(max-width:900px){
  #burger{display:inline-flex}
  .sidebar{position:fixed;left:-270px;top:0;transition:.28s left;z-index:50;box-shadow:0 0 40px -10px #000000cc}
  .sidebar.open{left:0}
  .sidebar-overlay.show{display:block;opacity:1}
  .main{padding:20px 16px}
  .topbar h1{font-size:19px}
  .grid-stats{grid-template-columns:repeat(2,1fr)}
  .stat-card{padding:14px}
  .form-row{grid-template-columns:1fr}
  .field{margin-bottom:12px}
  table{font-size:12.5px}
  thead th,tbody td{padding:8px 6px}
  .btn{width:100%;padding:12px 14px;font-size:14px}
}

@media(max-width:600px){
  .main{padding:16px 12px}
  .card{padding:16px;border-radius:12px}
  .card h2{font-size:15px;margin-bottom:12px}
  .field input,.field select{padding:11px 12px;font-size:16px;border-radius:8px}
  .form-row{gap:10px}
  .btn{padding:11px 12px;font-size:13px}
  .btn.btn-sm{padding:8px 12px}
}

@media(max-width:480px){
  .auth-card{padding:28px 22px}
  .grid-stats{grid-template-columns:1fr 1fr}
  .topbar{gap:8px;flex-direction:column}
  .topbar h1{font-size:17px}
  .who{display:none}
  .main{padding:12px 10px}
  .card{padding:14px}
  .card h2{font-size:14px}
  .key-code{font-size:12px;padding:3px 6px}
  table{font-size:11.5px}
  thead th,tbody td{padding:6px 4px}
  .copy-btn{width:24px;height:24px}
}