:root {
    --bg: #0b1220;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-2: #ffffff;
    --text: #122033;
    --muted: #6b7280;
    --primary: #5b6cff;
    --secondary: #20c997;
    --border: rgba(148, 163, 184, 0.25);
    --shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}
* { box-sizing: border-box; }
body {
    background:
        radial-gradient(circle at top left, rgba(91,108,255,.18), transparent 24%),
        radial-gradient(circle at top right, rgba(32,201,151,.16), transparent 20%),
        linear-gradient(135deg, #eff4ff 0%, #f8fafc 48%, #eef7f4 100%);
    color: var(--text);
    font-family: 'Inter', Arial, sans-serif;
    min-height: 100vh;
}
.app-wrapper { display:flex; min-height:100vh; }
.glass-panel {
    background: var(--surface);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,.55);
    box-shadow: var(--shadow);
}
.sidebar {
    width: 280px;
    padding: 24px 18px;
    position: fixed;
    inset: 14px auto 14px 14px;
    border-radius: 28px;
    overflow-y: auto;
}
.brand-box {
    padding: 16px 12px 12px;
    background: linear-gradient(135deg, rgba(91,108,255,.10), rgba(32,201,151,.10));
    border-radius: 22px;
}
.logo-placeholder {
    width: 78px;
    height: 78px;
    margin: auto;
    border-radius: 24px;
    background: linear-gradient(135deg, #5b6cff, #22c55e);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    box-shadow: 0 18px 34px rgba(91,108,255,.28);
}
.sidebar-nav .nav-link {
    color: #183153;
    border-radius: 16px;
    margin-bottom: 8px;
    padding: 12px 14px;
    font-weight: 600;
}
.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link:focus {
    background: linear-gradient(135deg, rgba(91,108,255,.12), rgba(32,201,151,.12));
    color: #0f172a;
}
.main-content {
    margin-left: 312px;
    width: calc(100% - 312px);
    padding: 18px 18px 18px 0;
}
.topbar {
    border-radius: 24px;
    padding: 18px 22px;
    margin-bottom: 22px;
}
.page-kicker {
    display:inline-block;
    margin-bottom:6px;
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: .72rem;
    color: var(--primary);
    font-weight: 800;
}
.dashboard-card, .content-card, .invoice-box {
    border: 0;
    border-radius: 24px;
    box-shadow: var(--shadow);
}
.dashboard-card {
    color:#fff;
    overflow:hidden;
}
.dashboard-card .card-body { padding: 22px; }
.card-blue { background: linear-gradient(135deg, #4f46e5, #3b82f6); }
.card-green { background: linear-gradient(135deg, #059669, #34d399); }
.card-orange { background: linear-gradient(135deg, #f97316, #fbbf24); }
.card-pink { background: linear-gradient(135deg, #db2777, #fb7185); }
.card-purple { background: linear-gradient(135deg, #7c3aed, #a855f7); }
.card-dark { background: linear-gradient(135deg, #0f172a, #334155); }
.content-card, .invoice-box {
    background: var(--surface-2);
}
.content-card .card-body { padding: 22px; }
.table > :not(caption) > * > * { padding: .9rem .9rem; }
.table thead th {
    background: #f3f7ff;
    color: #334155;
    border-bottom-width: 0;
    font-weight: 700;
}
.form-control, .form-select {
    border-radius: 14px;
    padding: 12px 14px;
    border: 1px solid #d8e1ee;
    box-shadow: none;
}
.form-control:focus, .form-select:focus {
    border-color: rgba(91,108,255,.55);
    box-shadow: 0 0 0 .25rem rgba(91,108,255,.15);
}
.btn {
    border-radius: 14px;
    padding: 10px 16px;
    font-weight: 600;
}
.badge { padding: .55rem .8rem; border-radius: 999px; }
.invoice-box { padding: 28px; }
.print-area {
    background: #fff;
    border-radius: 24px;
    padding: 26px;
    border: 1px solid #e7ecf3;
}
.invoice-head {
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    gap:20px;
}
.invoice-meta {
    padding: 14px 16px;
    border-radius: 18px;
    background: #f8fbff;
}
.summary-tile {
    background: linear-gradient(135deg, rgba(91,108,255,.08), rgba(32,201,151,.10));
    border-radius: 18px;
    padding: 14px 16px;
}
.search-strip {
    background: #f8fafc;
    border: 1px dashed #d8e1ee;
    border-radius: 18px;
    padding: 14px;
}
@media (max-width: 991px) {
    .sidebar {
        position: relative;
        inset: auto;
        width: auto;
        margin: 14px;
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 0 14px 14px;
    }
    .app-wrapper { display:block; }
}
@media print {
    .sidebar, .topbar, .no-print { display: none !important; }
    .main-content { margin: 0; width: 100%; padding: 0; }
    body { background: #fff; }
    .invoice-box, .print-area { box-shadow: none; border-radius: 0; border: 0; }
}