/* ===========================================================
   Recharge Billing — UI system
   Palette encodes financial status; money uses tabular numerals.
   =========================================================== */
:root{
  --bg:#f4f6fb;
  --surface:#ffffff;
  --ink:#141a2e;
  --ink-soft:#5a6483;
  --line:#e6e9f2;

  --nav:#141a2e;          /* deep slate navigation */
  --nav-soft:#1f2740;
  --nav-ink:#aeb7d4;
  --nav-ink-strong:#ffffff;

  --brand:#4f46e5;        /* indigo — single accent */
  --brand-soft:#eef0fe;

  --ok:#10b981;  --ok-bg:#e7f8f1;      /* success = mint */
  --pending:#f59e0b; --pending-bg:#fef3e2; /* pending = amber */
  --fail:#ef4444; --fail-bg:#fdecec;    /* failed = rose */
  --refund:#8b5cf6; --refund-bg:#f1ecfe;
  --review:#0ea5e9; --review-bg:#e6f5fe;

  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(20,26,46,.04), 0 8px 24px rgba(20,26,46,.06);
  --font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* money figures — the signature: aligned tabular numerals */
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.money::before{content:"৳ ";color:var(--ink-soft);font-family:var(--font)}

/* ---------- App shell ---------- */
.shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.sidebar{
  background:var(--nav);color:var(--nav-ink);
  padding:22px 16px;position:sticky;top:0;height:100vh;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 22px;color:#fff}
.brand-mark{
  width:34px;height:34px;border-radius:9px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--brand),#7c74ff);
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:16px;
}
.brand b{font-size:16px;font-weight:800;letter-spacing:-.02em}
.brand span{display:block;font-size:11px;color:var(--nav-ink);font-weight:500}

.nav-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#67719a;margin:18px 10px 6px}
.nav a{
  display:flex;align-items:center;gap:11px;
  padding:9px 11px;border-radius:9px;color:var(--nav-ink);
  font-weight:600;font-size:14px;margin-bottom:2px;transition:.15s;
}
.nav a:hover{background:var(--nav-soft);color:#fff;text-decoration:none}
.nav a.active{background:var(--brand);color:#fff}
.nav a svg{width:18px;height:18px;flex:0 0 18px;stroke-width:2}

.main{min-width:0}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 28px;background:var(--surface);border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20;
}
.topbar h1{font-size:18px;font-weight:800;letter-spacing:-.02em;margin:0}
.wallet-chip{
  display:flex;align-items:center;gap:14px;background:var(--brand-soft);
  border:1px solid #dfe1fb;border-radius:11px;padding:7px 14px;
}
.wallet-chip .lbl{font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}
.wallet-chip .val{font-weight:800;font-size:15px}
.user-menu{display:flex;align-items:center;gap:10px}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--nav);color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px}
.content{padding:26px 28px;max-width:1200px}

/* ---------- Cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-head{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.card-head h2{font-size:15px;font-weight:800;margin:0;letter-spacing:-.01em}
.card-body{padding:20px}

.grid{display:grid;gap:18px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}

/* stat tiles */
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.stat .k{font-size:12px;color:var(--ink-soft);font-weight:600;text-transform:uppercase;letter-spacing:.05em;display:flex;align-items:center;gap:8px}
.stat .v{font-size:26px;font-weight:800;margin-top:8px;letter-spacing:-.02em}
.stat .dot{width:9px;height:9px;border-radius:50%}
.dot.ok{background:var(--ok)} .dot.pending{background:var(--pending)}
.dot.fail{background:var(--fail)} .dot.brand{background:var(--brand)}

/* ---------- Pills ---------- */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;white-space:nowrap}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.pill.ok{color:#0a8a63;background:var(--ok-bg)}
.pill.pending{color:#b5730a;background:var(--pending-bg)}
.pill.fail{color:#c0322f;background:var(--fail-bg)}
.pill.refund{color:#6b41c9;background:var(--refund-bg)}
.pill.review{color:#0774a8;background:var(--review-bg)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th{
  text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.06em;
  color:var(--ink-soft);font-weight:700;padding:11px 16px;border-bottom:1px solid var(--line);
}
td{padding:13px 16px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:middle}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fafbff}
td.right,th.right{text-align:right}

/* ---------- Forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--ink)}
.field .hint{font-size:12px;color:var(--ink-soft);margin-top:5px}
input,select,textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:inherit;font-size:14px;background:#fff;color:var(--ink);transition:.15s;
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);
}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-family:inherit;font-weight:700;font-size:14px;cursor:pointer;transition:.15s;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#4238d6;text-decoration:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{background:#f6f7fb;text-decoration:none}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* ---------- Alerts ---------- */
.alert{padding:12px 16px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;margin-bottom:18px;border:1px solid transparent}
.alert-success{background:var(--ok-bg);color:#0a7a58;border-color:#bfead9}
.alert-error{background:var(--fail-bg);color:#b52d2a;border-color:#f6cfce}

/* ---------- Auth ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}
.auth-brand{
  background:linear-gradient(160deg,#141a2e,#242e52);color:#fff;
  padding:56px;display:flex;flex-direction:column;justify-content:space-between;
}
.auth-brand .big{font-size:34px;font-weight:800;letter-spacing:-.03em;line-height:1.15;margin-top:auto}
.auth-brand .sub{color:#aeb7d4;margin-top:14px;font-size:15px;max-width:34ch}
.auth-brand .mono-strip{font-family:var(--mono);font-size:12px;color:#67719a;margin-top:40px}
.auth-form{display:grid;place-items:center;padding:40px}
.auth-card{width:100%;max-width:380px}
.auth-card h2{font-size:24px;font-weight:800;letter-spacing:-.02em;margin:0 0 4px}
.auth-card p.lead{color:var(--ink-soft);margin:0 0 26px}

.timeline{list-style:none;margin:0;padding:0}
.timeline li{position:relative;padding:0 0 18px 26px;border-left:2px solid var(--line);margin-left:6px}
.timeline li:last-child{border-color:transparent}
.timeline li::before{content:"";position:absolute;left:-7px;top:2px;width:12px;height:12px;border-radius:50%;background:var(--brand);border:2px solid #fff}
.timeline .t{font-weight:700;font-size:14px}
.timeline .m{font-size:12px;color:var(--ink-soft)}

.empty{text-align:center;padding:46px 20px;color:var(--ink-soft)}
.empty svg{width:40px;height:40px;opacity:.4;margin-bottom:10px}

.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head p{margin:4px 0 0;color:var(--ink-soft);font-size:14px}
.mb{margin-bottom:18px}

/* mobile menu toggle (hidden on desktop) */
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:8px;cursor:pointer}
.menu-btn svg{width:20px;height:20px}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .shell{grid-template-columns:1fr}
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;width:250px;z-index:60;
    transform:translateX(-100%);transition:transform .22s ease;
  }
  .sidebar.open{transform:translateX(0)}
  .backdrop{display:none;position:fixed;inset:0;background:rgba(10,14,28,.5);z-index:55}
  .backdrop.show{display:block}
  .menu-btn{display:inline-flex}
  .auth-wrap{grid-template-columns:1fr}
  .auth-brand{display:none}
}
@media (max-width:560px){
  .grid-4,.grid-3,.grid-2,.row-2{grid-template-columns:1fr}
  .content{padding:18px 16px}
  .topbar{padding:12px 16px}
  .wallet-chip .lbl{display:none}
}

/* keyboard focus + reduced motion (quality floor) */
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}