:root{
  --bg:#f4f6fb;--surface:#ffffff;--surface-2:#f0f2f8;--text:#1b2236;--muted:#6a738a;--border:#e3e7f0;
  --primary:#ff6b35;--primary-600:#e9581f;--primary-soft:#fff0e8;
  --success:#12a150;--success-soft:#e5f7ed;--danger:#dc3545;--danger-soft:#fdecee;--warning:#d98a0b;--warning-soft:#fff3dc;
  --side:#141a2e;--side-text:#a9b1c9;--radius:14px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px rgba(16,24,40,.06);
  --font:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali","Kalpurush",sans-serif;
}
[data-theme="dark"]{
  --bg:#0d111e;--surface:#161b2d;--surface-2:#1d2339;--text:#e8ebf5;--muted:#8f98b3;--border:#272e48;
  --primary-soft:#3a2417;--success-soft:#113021;--danger-soft:#3a1719;--warning-soft:#3a2a0f;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;line-height:1.25}
.muted{color:var(--muted)}
.i{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* Layout */
.app{display:flex;min-height:100vh}
.sidebar{width:268px;background:var(--side);color:var(--side-text);position:fixed;top:0;bottom:0;left:0;display:flex;flex-direction:column;z-index:40;transition:transform .25s ease}
.brand{display:flex;align-items:center;gap:12px;padding:22px 22px 18px;color:#fff}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#ffa13c);display:grid;place-items:center;font-weight:800;color:#fff;font-size:18px;flex:none}
.brand strong{display:block;font-size:15px;line-height:1.2}
.brand small{color:var(--side-text);font-size:12px}
.nav{padding:10px 14px;flex:1;overflow:auto}
.nav-title{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6d7794;padding:14px 14px 8px}
.nav a{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;color:var(--side-text);font-weight:500;margin-bottom:4px}
.nav a:hover{background:rgba(255,255,255,.07);color:#fff;text-decoration:none}
.nav a.active{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(255,107,53,.35)}
.sidebar-foot{padding:16px;border-top:1px solid rgba(255,255,255,.08)}
.user-chip{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#fff}
.avatar{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.12);display:grid;place-items:center;font-weight:700;flex:none}
.user-chip small{display:block;color:var(--side-text);font-size:12px;overflow:hidden;text-overflow:ellipsis;max-width:150px;white-space:nowrap}
.main{margin-left:268px;flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:68px;display:flex;align-items:center;gap:14px;padding:0 28px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}
.topbar h1{font-size:19px;flex:1}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{background:var(--surface-2)}
#menuBtn{display:none}
.content{padding:28px;max-width:1280px;width:100%}
.overlay{display:none;position:fixed;inset:0;background:rgba(10,14,28,.55);z-index:30}

/* Cards, stats */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:22px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 22px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.card-head h2{font-size:16px}
.card-body{padding:22px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-bottom:22px}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat-label{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}
.stat-value{font-size:30px;font-weight:800}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:10px;border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;background:var(--surface-2);color:var(--text);text-decoration:none}
.btn:hover{text-decoration:none;filter:brightness(.97)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);filter:none}
.btn-danger{background:var(--danger);color:#fff}
.btn-ghost{background:transparent;border-color:var(--border)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-block{width:100%}

/* Tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);padding:12px 22px;background:var(--surface-2);white-space:nowrap}
td{padding:14px 22px;border-top:1px solid var(--border);vertical-align:middle}
tr:hover td{background:color-mix(in srgb,var(--surface-2) 55%,transparent)}
td .sub{display:block;color:var(--muted);font-size:13px}
.actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.empty{padding:40px;text-align:center;color:var(--muted)}
.pager{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;border-top:1px solid var(--border)}

/* Badges, alerts */
.badge{display:inline-block;padding:3px 11px;border-radius:999px;font-size:12px;font-weight:700}
.badge-active{background:var(--success-soft);color:var(--success)}
.badge-suspended{background:var(--danger-soft);color:var(--danger)}
.badge-expired{background:var(--warning-soft);color:var(--warning)}
.badge-plan{background:var(--primary-soft);color:var(--primary-600)}
.alert{padding:13px 16px;border-radius:10px;margin-bottom:18px;font-weight:500}
.alert-success{background:var(--success-soft);color:var(--success)}
.alert-danger{background:var(--danger-soft);color:var(--danger)}
.alert ul{margin:0;padding-left:18px}

/* Forms */
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{margin-bottom:16px}
.form-grid .field{margin-bottom:0}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
.input{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);font:inherit}
.input:focus{outline:2px solid color-mix(in srgb,var(--primary) 45%,transparent);border-color:var(--primary)}
.input-group{display:flex}
.input-group .input{border-top-right-radius:0;border-bottom-right-radius:0}
.input-suffix{display:flex;align-items:center;padding:0 14px;background:var(--surface-2);border:1px solid var(--border);border-left:0;border-radius:0 10px 10px 0;color:var(--muted);white-space:nowrap;font-size:14px}
.hint{display:block;color:var(--muted);font-size:13px;margin-top:5px}
.check{display:flex;align-items:center;gap:8px;margin:6px 0 18px;color:var(--muted)}
.form-actions{margin-top:22px;display:flex;gap:10px}
.search{display:flex;gap:8px}
.search .input{min-width:220px}
.kv{display:grid;grid-template-columns:150px 1fr;gap:10px 16px;margin:0}
.kv dt{color:var(--muted)}
.kv dd{margin:0;font-weight:600;word-break:break-word}
.grid-2{display:grid;grid-template-columns:2fr 1fr;gap:22px;align-items:start}
.danger-zone{border-color:color-mix(in srgb,var(--danger) 40%,var(--border))}

/* Auth */
.auth{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.auth-hero{background:linear-gradient(145deg,#141a2e 0%,#232c52 55%,#ff6b35 160%);color:#fff;padding:48px;display:flex;flex-direction:column;justify-content:space-between}
.auth-hero h1{font-size:38px;max-width:440px;margin-bottom:14px}
.auth-hero p{color:#c4cbe2;max-width:420px;margin:0}
.auth-form{display:grid;place-items:center;padding:32px;background:var(--bg)}
.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:32px;box-shadow:var(--shadow)}
.auth-card h2{font-size:24px;margin-bottom:4px}
.auth-card .muted{margin:0 0 22px}
.center-page{min-height:100vh;display:grid;place-items:center;padding:24px;text-align:center}
.center-page .auth-card{max-width:460px}

@media (max-width:960px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:none}
  .overlay.show{display:block}
  .main{margin-left:0}
  #menuBtn{display:grid}
  .topbar{padding:0 16px}
  .content{padding:18px 14px}
  .grid-2,.form-grid{grid-template-columns:1fr}
  .auth{grid-template-columns:1fr}
  .auth-hero{display:none}
  .kv{grid-template-columns:120px 1fr}
}