:root{
  --bg:#0b0b0d;--panel:#141418;--panel2:#1b1b21;--line:#2a2a33;--text:#ecebe6;--muted:#9a978e;
  --gold:#e3b34a;--gold2:#f6d78a;--gold3:#b9852a;--red:#ff5a4e;--green:#3ecf8e;--blue:#5aa9ff;--amber:#ffb547;
  --r:12px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--gold2)}
button,input,select,textarea{font:inherit;color:inherit}
.center{min-height:80vh;display:grid;place-items:center}
.muted{color:var(--muted)}
.small{font-size:13px}
.gold{background:linear-gradient(180deg,var(--gold2),var(--gold) 55%,var(--gold3));-webkit-background-clip:text;background-clip:text;color:transparent}

/* đăng nhập / cài đặt */
.auth{max-width:400px;margin:10vh auto;padding:0 16px}
.auth .card{padding:28px}
.auth h1{margin:0 0 4px;font-size:26px}
.auth p{margin:0 0 18px}
.brand-mark{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-weight:800;font-size:20px;color:#111;
  background:linear-gradient(135deg,var(--gold2),var(--gold3));margin-bottom:14px;letter-spacing:.5px}

/* khung chính */
.top{position:sticky;top:0;z-index:5;background:rgba(11,11,13,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .in{max-width:1200px;margin:auto;display:flex;align-items:center;gap:16px;padding:10px 16px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;white-space:nowrap}
.logo .brand-mark{width:34px;height:34px;font-size:13px;border-radius:9px;margin:0}
nav{display:flex;gap:4px;flex-wrap:wrap;flex:1}
nav a{padding:7px 12px;border-radius:9px;text-decoration:none;color:var(--muted);font-weight:600}
nav a:hover{color:var(--text);background:var(--panel2)}
nav a.on{color:#111;background:linear-gradient(180deg,var(--gold2),var(--gold))}
main{max-width:1200px;margin:auto;padding:20px 16px 60px}
h2{margin:4px 0 16px;font-size:22px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.end{justify-content:flex-end}
.grow{flex:1}

.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.tool-card{display:flex;flex-direction:column;gap:14px}
.tool-head{display:flex;align-items:center;gap:12px}
.tool-head img{width:48px;height:48px;border-radius:12px;object-fit:cover;background:#000;border:1px solid var(--line)}
.tool-head b{font-size:18px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{background:var(--panel2);border-radius:10px;padding:10px}
.stat b{display:block;font-size:22px}
.stat span{font-size:12px;color:var(--muted)}

/* nút, ô nhập */
.btn{border:1px solid var(--line);background:var(--panel2);padding:8px 14px;border-radius:9px;cursor:pointer;font-weight:600;white-space:nowrap}
.btn:hover{border-color:#444}
.btn.pri{background:linear-gradient(180deg,var(--gold2),var(--gold));color:#141006;border-color:var(--gold3)}
.btn.pri:hover{filter:brightness(1.06)}
.btn.red{color:var(--red)}
.btn.sm{padding:4px 9px;font-size:13px;border-radius:7px}
.btn:disabled{opacity:.5;cursor:default}
input,select,textarea{width:100%;background:#0f0f12;border:1px solid var(--line);border-radius:9px;padding:9px 11px;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--gold)}
textarea{min-height:70px;resize:vertical}
label.f{display:block;margin-bottom:12px}
label.f>span{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.err{color:var(--red);min-height:1.2em;font-size:14px;margin:6px 0}
.radio{display:flex;gap:8px;margin-bottom:12px}
.radio label{flex:1;border:1px solid var(--line);border-radius:9px;padding:9px;cursor:pointer;text-align:center}
.radio input{display:none}
.radio label:has(input:checked){border-color:var(--gold);color:var(--gold2)}

/* bảng */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;min-width:820px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:var(--panel);position:sticky;top:0}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#121216}
.mono{font-family:ui-monospace,Consolas,monospace;font-size:13.5px}
.key{cursor:pointer;color:var(--gold2)}
.key:hover{text-decoration:underline}
.badge{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:700;white-space:nowrap}
.b-new{background:#1d2a3d;color:var(--blue)}
.b-in_use{background:#123426;color:var(--green)}
.b-blocked{background:#3a1717;color:var(--red)}
.b-expired{background:#3a2a10;color:var(--amber)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#444;margin-right:6px}
.dot.on{background:var(--green);box-shadow:0 0 6px var(--green)}
.acts{display:flex;gap:4px;flex-wrap:wrap}
.empty{padding:40px;text-align:center;color:var(--muted)}

/* hộp thoại */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.65);display:grid;place-items:center;z-index:20;padding:16px}
.modal .card{width:100%;max-width:520px;max-height:92vh;overflow:auto}
.modal h3{margin:0 0 14px}
.keys-out{background:#0f0f12;border:1px dashed var(--gold3);border-radius:10px;padding:12px;font-family:ui-monospace,Consolas,monospace;white-space:pre-wrap;word-break:break-all;margin:10px 0}
.secret{filter:blur(5px);cursor:pointer}
.secret.show{filter:none}

#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--gold);color:#141006;font-weight:700;padding:10px 18px;border-radius:10px;z-index:30;box-shadow:0 6px 24px rgba(0,0,0,.5)}
#toast.bad{background:var(--red);color:#fff}

@media (max-width:640px){
  .top .in{gap:8px}
  nav{order:3;flex-basis:100%}
  nav a{padding:6px 9px;font-size:14px}
  .stats{grid-template-columns:repeat(2,1fr)}
}
#logout{margin-left:auto}