/* ==========================================================================
   VTUFlex — app.css  (mobile-first, self-contained, no external deps)
   ========================================================================== */
:root{
  --brand:#6d28d9; --brand-600:#7c3aed; --brand-700:#5b21b6; --brand-50:#f5f3ff;
  --accent:#06b6d4;
  --ok:#16a34a; --ok-bg:#dcfce7; --warn:#d97706; --warn-bg:#fef3c7;
  --danger:#dc2626; --danger-bg:#fee2e2; --info:#0284c7; --info-bg:#e0f2fe;
  --ink:#0f172a; --muted:#64748b; --line:#e5e7eb; --bg:#f6f7fb; --card:#ffffff;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,23,42,.06), 0 8px 24px rgba(15,23,42,.06);
  --shadow-sm:0 1px 2px rgba(15,23,42,.08);
  --grad:linear-gradient(135deg,#7c3aed 0%,#6d28d9 45%,#4f46e5 100%);
  --maxw:1120px; --sidebar:248px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--brand-700);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
svg{vertical-align:middle}
/* Inline-SVG icon sizing — containers set the box, the svg fills sensibly */
svg.ic{width:22px;height:22px;flex:none}
.btn svg.ic{width:18px;height:18px}
.nav a svg.ic,.bottomnav a svg.ic{width:21px;height:21px}
.service .ic svg.ic,.feat .ic svg.ic,.tx .ic svg.ic{width:24px;height:24px}
.choice .logo svg.ic{width:24px;height:24px}
.receipt-ic svg.ic{width:38px;height:38px}
.empty svg.ic{width:44px;height:44px;color:var(--muted)}
h1,h2,h3,h4{margin:0 0 .4em;line-height:1.25;font-weight:700}
h1{font-size:1.6rem} h2{font-size:1.25rem} h3{font-size:1.05rem}
p{margin:0 0 1em}
small{color:var(--muted)}
.muted{color:var(--muted)}
.center{text-align:center}
.hide{display:none!important}
.nowrap{white-space:nowrap}

/* --- Layout primitives --- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}
.row{display:flex;gap:16px;flex-wrap:wrap}
.col{flex:1 1 0;min-width:0}
.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.stack>*+*{margin-top:14px}
.spread{display:flex;align-items:center;justify-content:space-between;gap:12px}
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}

/* --- Cards --- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:18px}
.card.pad-lg{padding:24px}
.card-title{font-size:1rem;font-weight:700;margin:0 0 12px}
.section-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700;margin:24px 0 10px}

/* --- Buttons --- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:inherit;font-weight:600;cursor:pointer;border:1px solid transparent;border-radius:12px;
  padding:12px 18px;background:#eef2ff;color:var(--brand-700);transition:.15s;text-decoration:none;line-height:1}
.btn:hover{filter:brightness(.98);text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn.is-loading{opacity:.65;cursor:not-allowed}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(109,40,217,.28)}
.btn-primary:hover{filter:brightness(1.04)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-danger{background:var(--danger);color:#fff}
.btn-success{background:var(--ok);color:#fff}
.btn-block{width:100%}
.btn-sm{padding:8px 12px;font-size:.85rem;border-radius:10px}
.btn-lg{padding:15px 22px;font-size:1.05rem}
.btn .spin{width:16px;height:16px;border:2px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* --- Forms --- */
.field{margin-bottom:16px}
.label{display:block;font-weight:600;font-size:.85rem;margin-bottom:6px;color:#334155}
.input,select.input,textarea.input{
  width:100%;font:inherit;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);transition:.15s}
.input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(124,58,237,.15)}
.input::placeholder{color:#9aa5b1}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%2364748b' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:38px}
.input-group{position:relative}
.input-affix{position:absolute;top:50%;transform:translateY(-50%);left:14px;color:var(--muted);font-weight:600}
.input-group .input.has-affix{padding-left:30px}
.hint{font-size:.8rem;color:var(--muted);margin-top:5px}
.err-text{color:var(--danger);font-size:.82rem;margin-top:5px}
.checkbox{display:flex;align-items:center;gap:9px;font-size:.9rem;color:#334155}
.checkbox input{width:18px;height:18px;accent-color:var(--brand-600)}

/* PIN inputs */
.pin-row{display:flex;gap:12px;justify-content:center}
.pin-row input{width:54px;height:60px;text-align:center;font-size:1.6rem;font-weight:700;border:1.5px solid var(--line);border-radius:12px}
.pin-row input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(124,58,237,.15)}

/* --- Badges --- */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:.75rem;font-weight:700;padding:4px 10px;border-radius:999px;white-space:nowrap}
.badge-success{background:var(--ok-bg);color:#166534}
.badge-warning{background:var(--warn-bg);color:#92400e}
.badge-danger{background:var(--danger-bg);color:#991b1b}
.badge-info{background:var(--info-bg);color:#075985}
.badge-muted{background:#f1f5f9;color:#475569}
.pill{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--brand-50);color:var(--brand-700)}

/* --- Alerts / flash --- */
.alert{border-radius:12px;padding:13px 16px;margin-bottom:16px;font-size:.9rem;border:1px solid transparent;display:flex;gap:10px;align-items:flex-start}
.alert-success{background:var(--ok-bg);color:#166534;border-color:#bbf7d0}
.alert-error,.alert-danger{background:var(--danger-bg);color:#991b1b;border-color:#fecaca}
.alert-warning{background:var(--warn-bg);color:#92400e;border-color:#fde68a}
.alert-info{background:var(--info-bg);color:#075985;border-color:#bae6fd}

/* --- Tables --- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
table.table{width:100%;border-collapse:collapse;font-size:.9rem}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.table th{font-size:.74rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:#fafbfd}
.table tr:last-child td{border-bottom:none}
.table tbody tr:hover{background:#fafafe}

/* --- Auth pages --- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;
  background:var(--grad)}
.auth-card{width:100%;max-width:440px;background:#fff;border-radius:22px;box-shadow:0 24px 60px rgba(15,23,42,.25);padding:30px 26px}
.auth-logo{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:6px}
.auth-card h1{font-size:1.4rem;text-align:center}
.auth-sub{text-align:center;color:var(--muted);margin-bottom:22px;font-size:.92rem}
.auth-foot{text-align:center;margin-top:18px;font-size:.9rem;color:var(--muted)}

/* Brand mark */
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:1.15rem;color:var(--ink)}
.brand .mark{width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:0 4px 12px rgba(109,40,217,.35)}
.brand.on-dark,.brand.on-dark .mark{color:#fff}

/* ==========================================================================
   App shell (authenticated area)
   ========================================================================== */
.app{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);background:#fff;border-right:1px solid var(--line);position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;padding:18px 14px;z-index:40}
.sidebar .brand{padding:6px 8px 18px}
.nav{display:flex;flex-direction:column;gap:3px;overflow-y:auto}
.nav a{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;color:#475569;font-weight:600;font-size:.92rem}
.nav a:hover{background:var(--brand-50);text-decoration:none;color:var(--brand-700)}
.nav a.active{background:var(--grad);color:#fff;box-shadow:0 6px 14px rgba(109,40,217,.3)}
.nav a .ic{width:20px;height:20px;flex:none}
.nav-sep{height:1px;background:var(--line);margin:10px 6px}
.content{flex:1;margin-left:var(--sidebar);min-width:0;display:flex;flex-direction:column}
.topbar{height:64px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 18px;position:sticky;top:0;z-index:30}
.topbar .menu-btn{display:none;background:none;border:none;cursor:pointer;padding:6px}
.page{padding:20px 18px 96px;width:100%;max-width:var(--maxw);margin:0 auto}
.page-head{margin-bottom:18px}
.page-head h1{font-size:1.4rem;margin:0}
.page-head p{margin:4px 0 0;color:var(--muted)}

.avatar{width:38px;height:38px;border-radius:50%;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-weight:700;border:1px solid var(--line)}
.user-chip{display:flex;align-items:center;gap:10px}
.user-chip .nm{font-weight:700;font-size:.9rem;line-height:1.1}
.user-chip .rl{font-size:.74rem;color:var(--muted)}

/* Wallet hero */
.wallet-hero{background:var(--grad);color:#fff;border-radius:20px;padding:22px;box-shadow:0 14px 30px rgba(109,40,217,.3);position:relative;overflow:hidden}
.wallet-hero::after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.12)}
.wallet-hero .lbl{opacity:.85;font-size:.82rem;font-weight:600;letter-spacing:.03em}
.wallet-hero .bal{font-size:2.1rem;font-weight:800;margin:6px 0 14px;letter-spacing:-.5px}
.wallet-hero .acts{display:flex;gap:10px;flex-wrap:wrap}
.wallet-hero .btn{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.25)}
.wallet-hero .btn.solid{background:#fff;color:var(--brand-700)}

/* Stat cards */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat .k{font-size:.78rem;color:var(--muted);font-weight:600}
.stat .v{font-size:1.4rem;font-weight:800;margin-top:4px}

/* Service quick-grid */
.services{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.service{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 10px;text-align:center;color:var(--ink);transition:.15s;display:block}
.service:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow)}
.service .ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin:0 auto 8px;font-size:1.4rem}
.service .nm{font-weight:700;font-size:.85rem}
.svc-air{background:#ecfeff;color:#0891b2}
.svc-data{background:#f5f3ff;color:#7c3aed}
.svc-power{background:#fff7ed;color:#ea580c}
.svc-tv{background:#eff6ff;color:#2563eb}
.svc-ref{background:#f0fdf4;color:#16a34a}
.svc-api{background:#fef2f2;color:#dc2626}

/* Network/biller chooser */
.choice-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.choice{border:1.5px solid var(--line);border-radius:14px;padding:12px 8px;text-align:center;cursor:pointer;background:#fff;transition:.12s;font-weight:700;font-size:.85rem}
.choice:hover{border-color:var(--brand-600)}
.choice.sel{border-color:var(--brand-600);background:var(--brand-50);box-shadow:0 0 0 3px rgba(124,58,237,.12)}
.choice .logo{width:42px;height:42px;border-radius:11px;margin:0 auto 7px;display:grid;place-items:center;font-weight:800;color:#fff}
.logo-mtn{background:#ffcc00;color:#111!important}
.logo-glo{background:#1aa14a}
.logo-airtel{background:#e40000}
.logo-9mobile{background:#006a4d}
.logo-gen{background:var(--grad)}

/* Plan list (radio cards) */
.plan-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.plan{border:1.5px solid var(--line);border-radius:13px;padding:13px;cursor:pointer;transition:.12s;background:#fff}
.plan:hover{border-color:var(--brand-600)}
.plan.sel{border-color:var(--brand-600);background:var(--brand-50);box-shadow:0 0 0 3px rgba(124,58,237,.12)}
.plan .nm{font-weight:700}
.plan .pr{color:var(--brand-700);font-weight:800;margin-top:3px}
.plan .vd{font-size:.78rem;color:var(--muted)}

/* Amount quick chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:9px 14px;cursor:pointer;font-weight:700;font-size:.88rem}
.chip:hover{border-color:var(--brand-600)}
.chip.sel{border-color:var(--brand-600);background:var(--brand-50);color:var(--brand-700)}

/* Transaction list */
.tx-list{display:flex;flex-direction:column}
.tx{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.tx:last-child{border-bottom:none}
.tx .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex:none;font-size:1.1rem}
.tx .meta{flex:1;min-width:0}
.tx .meta .t{font-weight:700;font-size:.92rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tx .meta .s{font-size:.78rem;color:var(--muted)}
.tx .amt{text-align:right;font-weight:800;white-space:nowrap}
.tx .amt.credit{color:var(--ok)}
.tx .amt.debit{color:var(--ink)}
.empty{text-align:center;color:var(--muted);padding:40px 16px}
.empty .ic{font-size:2.4rem;margin-bottom:8px}

/* Modal */
.modal-bg{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;align-items:center;justify-content:center;z-index:80;padding:16px}
.modal-bg.open{display:flex}
.modal{background:#fff;border-radius:20px;width:100%;max-width:420px;padding:24px;box-shadow:0 30px 70px rgba(0,0,0,.3)}
.modal h3{text-align:center}
.kv{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:.92rem}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.kv .v{font-weight:700;text-align:right;word-break:break-word}

/* Receipt */
.receipt-ic{width:74px;height:74px;border-radius:50%;display:grid;place-items:center;margin:0 auto 12px;font-size:2.2rem}

/* Bottom nav (mobile) */
.bottomnav{display:none;position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--line);
  z-index:50;padding:6px 4px env(safe-area-inset-bottom);justify-content:space-around}
.bottomnav a{flex:1;text-align:center;color:var(--muted);font-size:.68rem;font-weight:600;padding:6px 2px;display:flex;flex-direction:column;align-items:center;gap:3px}
.bottomnav a.active{color:var(--brand-700)}
.bottomnav a .ic{width:22px;height:22px}

/* Landing */
.lhero{background:var(--grad);color:#fff;padding:0 0 60px}
.lnav{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.lhero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center;padding-top:30px}
.lhero h1{font-size:2.6rem;line-height:1.1;letter-spacing:-1px}
.lhero p.lead{font-size:1.1rem;opacity:.92;max-width:520px}
.lhero .btn-primary{background:#fff;color:var(--brand-700)}
.phone-mock{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:26px;padding:18px;backdrop-filter:blur(6px)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:40px 0}
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.feat .ic{width:48px;height:48px;border-radius:13px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:1.4rem;margin-bottom:12px}
.lfoot{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:.9rem;margin-top:20px}
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:39;display:none}
.overlay.open{display:block}

/* Toast */
.toast-wrap{position:fixed;left:50%;transform:translateX(-50%);bottom:24px;z-index:100;display:flex;flex-direction:column;gap:8px}
.toast{background:#0f172a;color:#fff;padding:12px 18px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.3);font-size:.9rem;font-weight:600;animation:rise .25s ease}
.toast.ok{background:#166534}.toast.err{background:#991b1b}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:980px){
  .lhero-inner{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .sidebar{transform:translateX(-100%);transition:transform .25s;box-shadow:0 0 40px rgba(0,0,0,.2)}
  .sidebar.open{transform:none}
  .content{margin-left:0}
  .topbar .menu-btn{display:block}
  .bottomnav{display:flex}
  .page{padding-bottom:84px}
}
@media (max-width:640px){
  body{font-size:14.5px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .services{grid-template-columns:repeat(4,1fr);gap:8px}
  .service .nm{font-size:.74rem}
  .choice-grid{grid-template-columns:repeat(2,1fr)}
  .plan-list{grid-template-columns:1fr}
  .lhero h1{font-size:2rem}
  .feature-grid{grid-template-columns:1fr}
  .wallet-hero .bal{font-size:1.8rem}
  .page-head h1{font-size:1.25rem}
}