/* SLMS - Premium Fintech UI */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(15,23,42,.05);
    --shadow: 0 4px 6px -1px rgba(15,23,42,.08), 0 2px 4px -2px rgba(15,23,42,.05);
    --shadow-lg: 0 20px 40px -10px rgba(15,23,42,.15);
    --radius: 14px;
    --radius-sm: 8px;
    --sidebar-w: 260px;
    --header-h: 64px;
    --transition: all .2s ease;
}

[data-theme="dark"] {
    --bg: #0b1120;
    --surface: #111827;
    --surface-2: #1f2937;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #1f2937;
    --shadow: 0 4px 6px -1px rgba(0,0,0,.4);
    --shadow-lg: 0 20px 40px -10px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
    transition: background .3s, color .3s;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* Layout */
.app { min-height: 100vh; display: grid; grid-template-columns: var(--sidebar-w) 1fr; grid-template-rows: var(--header-h) 1fr; }
.sidebar { grid-row: 1 / span 2; background: linear-gradient(180deg, #111827, #1f2937); color: #cbd5e1; overflow-y: auto; }
.header { background: var(--surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-shadow: var(--shadow-sm); }
.main { padding: 24px; overflow-y: auto; }

/* Sidebar */
.brand { padding: 18px 22px; font-size: 1.2rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand .logo { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: grid; place-items: center; font-size: 1.2rem; }
.nav { padding: 12px 8px; }
.nav-section { padding: 10px 14px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #64748b; }
.nav a { display: flex; align-items: center; gap: 12px; padding: 10px 14px; color: #cbd5e1; border-radius: var(--radius-sm); margin-bottom: 2px; transition: var(--transition); font-weight: 500; }
.nav a:hover { background: rgba(255,255,255,.05); color: #fff; }
.nav a.active { background: linear-gradient(90deg, var(--primary), var(--primary-light)); color: #fff; box-shadow: 0 6px 14px rgba(99,102,241,.4); }
.nav a .icon { width: 18px; text-align: center; }

/* Header */
.header-title { font-weight: 600; font-size: 1.05rem; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.theme-toggle, .icon-btn { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); width: 38px; height: 38px; border-radius: 10px; cursor: pointer; transition: var(--transition); display: grid; place-items: center; }
.theme-toggle:hover, .icon-btn:hover { background: var(--border); }
.user-pill { display: flex; align-items: center; gap: 10px; padding: 4px 14px 4px 4px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; }
.user-pill .avatar { width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; display: grid; place-items: center; font-weight: 700; }
.user-pill .meta { font-size: 12px; line-height: 1.2; }
.user-pill .meta b { display: block; }
.user-pill .meta span { color: var(--text-muted); text-transform: capitalize; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 20px; transition: var(--transition); }
.card:hover { box-shadow: var(--shadow); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.card-title { font-size: 1rem; font-weight: 600; margin: 0; }

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: relative; overflow: hidden; transition: var(--transition); }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-card::before { content: ''; position: absolute; top: 0; right: 0; width: 80px; height: 80px; border-radius: 50%; opacity: .08; }
.stat-card.primary::before { background: var(--primary); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before  { background: var(--danger); }
.stat-card.info::before    { background: var(--info); }
.stat-card .stat-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 1.3rem; margin-bottom: 12px; color: #fff; }
.stat-card.primary .stat-icon { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.stat-card.success .stat-icon { background: linear-gradient(135deg, var(--success), #059669); }
.stat-card.warning .stat-icon { background: linear-gradient(135deg, var(--warning), #d97706); }
.stat-card.danger .stat-icon  { background: linear-gradient(135deg, var(--danger), #dc2626); }
.stat-card.info .stat-icon    { background: linear-gradient(135deg, var(--info), #2563eb); }
.stat-label { color: var(--text-muted); font-size: 13px; font-weight: 500; }
.stat-value { font-size: 1.8rem; font-weight: 700; margin-top: 4px; letter-spacing: -.02em; }
.stat-foot { color: var(--text-muted); font-size: 12px; margin-top: 6px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); font-weight: 600; font-size: 14px; cursor: pointer; transition: var(--transition); }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-color: transparent; }
.btn-success { background: linear-gradient(135deg, var(--success), #059669); color: #fff; border-color: transparent; }
.btn-danger  { background: linear-gradient(135deg, var(--danger), #dc2626);   color: #fff; border-color: transparent; }
.btn-warning { background: linear-gradient(135deg, var(--warning), #d97706);  color: #fff; border-color: transparent; }
.btn-secondary { background: var(--surface-2); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { background: var(--surface-2); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-control, .form-select, textarea.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text); font-size: 14px; transition: var(--transition); }
.form-control:focus, .form-select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99,102,241,.12); }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.form-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.invalid-feedback { color: var(--danger); font-size: 12px; margin-top: 4px; display: block; }

/* Tables */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { background: var(--surface-2); font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.table tbody tr:hover { background: var(--surface-2); }
.table tbody tr:last-child td { border-bottom: 0; }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; }
.badge-success { background: rgba(16,185,129,.12); color: var(--success); }
.badge-warning { background: rgba(245,158,11,.12); color: var(--warning); }
.badge-danger  { background: rgba(239,68,68,.12);  color: var(--danger); }
.badge-info    { background: rgba(59,130,246,.12); color: var(--info); }
.badge-secondary { background: var(--surface-2); color: var(--text-muted); }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-weight: 500; border-left: 4px solid; display: flex; align-items: center; gap: 10px; }
.alert-success { background: rgba(16,185,129,.1);  color: #047857; border-color: var(--success); }
.alert-error   { background: rgba(239,68,68,.1);   color: #b91c1c; border-color: var(--danger); }
.alert-warning { background: rgba(245,158,11,.1);  color: #92400e; border-color: var(--warning); }
.alert-info    { background: rgba(59,130,246,.1);  color: #1e40af; border-color: var(--info); }

/* Glass auth */
.auth-bg { min-height: 100vh; display: grid; place-items: center; padding: 20px; background:
    radial-gradient(circle at 20% 30%, #818cf8 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, #22d3ee 0%, transparent 40%),
    linear-gradient(135deg, #0f172a, #1e293b); }
.auth-card { backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 20px; padding: 40px; width: 100%; max-width: 420px; color: #fff; box-shadow: var(--shadow-lg); }
.auth-card h1 { margin: 0 0 8px; font-size: 1.6rem; }
.auth-card p.lead { color: rgba(255,255,255,.7); margin-top: 0; margin-bottom: 28px; }
.auth-card .form-control { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); color: #fff; }
.auth-card .form-control::placeholder { color: rgba(255,255,255,.5); }
.auth-card .form-label { color: rgba(255,255,255,.85); }
.auth-card .auth-logo { width: 56px; height: 56px; border-radius: 16px; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: grid; place-items: center; color:#fff; font-size: 1.6rem; font-weight: 800; margin-bottom: 20px; }

/* Pagination */
.pagination { display: flex; gap: 4px; align-items: center; }
.pagination a, .pagination span { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border); color: var(--text); background: var(--surface); font-weight: 600; font-size: 13px; }
.pagination a:hover { background: var(--surface-2); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.page-header h2 { margin: 0; font-size: 1.4rem; }
.page-header .actions { display: flex; gap: 10px; }

/* Skeleton */
.skeleton { background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%); background-size: 200% 100%; animation: skel 1.4s infinite; border-radius: 6px; }
@keyframes skel { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--surface); border: 1px solid var(--border); padding: 12px 18px; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); min-width: 280px; animation: toastIn .3s ease; border-left: 4px solid var(--primary); }
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* Responsive */
@media (max-width: 900px) {
    .app { grid-template-columns: 1fr; }
    .sidebar { position: fixed; left: -100%; top: 0; bottom: 0; width: var(--sidebar-w); z-index: 100; transition: left .3s; }
    .sidebar.open { left: 0; }
    .header { padding: 0 16px; }
    .main { padding: 16px; }
    .menu-toggle { display: grid !important; }
}
.menu-toggle { display: none; }

/* Receipt / Print */
.receipt { background: #fff; color: #000; max-width: 600px; margin: 0 auto; padding: 40px; border: 1px solid var(--border); border-radius: var(--radius); }
.receipt h1 { margin: 0 0 4px; font-size: 1.6rem; }
.receipt .inst { text-align: center; margin-bottom: 24px; }
.receipt .inst p { margin: 2px 0; font-size: 13px; color: #555; }
.receipt .ref { text-align: center; margin: 14px 0 22px; padding: 10px; background: #f1f5f9; border-radius: 8px; font-family: monospace; font-weight: 700; }
.receipt table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.receipt table th, .receipt table td { padding: 8px 12px; border-bottom: 1px solid #e2e8f0; text-align: left; font-size: 14px; }
.receipt .amount-row { background: #f1f5f9; font-size: 1.2rem; font-weight: 700; }
.receipt .footer { text-align: center; margin-top: 30px; color: #94a3b8; font-size: 11px; }
.print-actions { text-align: center; margin: 20px 0; }
@media print {
    body { background: #fff !important; }
    .sidebar, .header, .print-actions, .app { display: block; }
    .sidebar, .header, .main > *:not(.receipt), .print-actions { display: none !important; }
    .main { padding: 0 !important; }
    .receipt { border: none; box-shadow: none; }
}

/* Utilities */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-right { text-align: right; }
.text-center{ text-align: center; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.d-flex { display: flex; } .gap-2 { gap: 12px; } .justify-between { justify-content: space-between; } .align-center { align-items: center; }
.row-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .row-2 { grid-template-columns: 1fr; } }