:root {
    --navy: #20334d;
    --teal: #0f766e;
    --line: #dbe3ef;
    --soft: #f5f7fb;
    --ink: #1d2733;
}
body { margin: 0; background: var(--soft); color: var(--ink); font-size: 14px; }
.app-shell { min-height: 100vh; display: flex; }
.sidebar { width: 260px; background: var(--navy); color: #fff; position: fixed; inset: 0 auto 0 0; padding: 18px 14px; transition: transform .2s ease; z-index: 20; }
.brand { font-size: 22px; font-weight: 700; padding: 10px 12px 22px; }
.sidebar a { display: block; color: #dce7f7; text-decoration: none; padding: 11px 12px; border-radius: 6px; margin-bottom: 4px; }
.sidebar a:hover, .sidebar a.active { background: var(--teal); color: #fff; }
.main-content { margin-left: 260px; width: calc(100% - 260px); min-height: 100vh; }
.topbar { height: 64px; background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 14px; padding: 0 22px; position: sticky; top: 0; z-index: 10; }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.content-wrap { padding: 22px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px; margin-bottom: 18px; box-shadow: 0 8px 24px rgba(27,43,65,.05); }
.page-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 16px; min-height: 102px; }
.stat .label { color: #66758a; font-size: 13px; }
.stat .value { font-size: 26px; font-weight: 800; margin-top: 8px; }
.stat-link { display: block; color: var(--ink); text-decoration: none; }
.stat-link:hover { border-color: var(--teal); box-shadow: 0 10px 26px rgba(15,118,110,.12); }
.stat-link .label, .stat-link .value { display: block; }
.mini-card { display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; color: var(--ink); text-decoration: none; background: #fff; }
.mini-card span { font-size: 22px; font-weight: 800; color: var(--teal); }
.mini-card:hover { border-color: var(--teal); }
.table th { white-space: nowrap; }
.form-label { font-weight: 600; }
.sidebar-toggle { display: none; }
.invoice-table td { vertical-align: middle; }
.invoice-totals { display: grid; gap: 8px; justify-content: end; text-align: right; padding-top: 12px; border-top: 1px solid var(--line); }
.invoice-totals strong { display: inline-block; min-width: 110px; font-size: 16px; }
.settings-logo { max-height: 86px; max-width: 180px; object-fit: contain; border: 1px solid var(--line); border-radius: 8px; padding: 8px; background: #fff; }
.invoice-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 26px; box-shadow: 0 12px 30px rgba(27,43,65,.06); }
.invoice-brand-row { display: flex; justify-content: space-between; gap: 24px; border-bottom: 2px solid var(--navy); padding-bottom: 18px; margin-bottom: 18px; }
.invoice-brand-left { display: flex; gap: 16px; align-items: flex-start; }
.invoice-logo { width: 84px; height: 84px; object-fit: contain; border: 1px solid var(--line); border-radius: 8px; padding: 6px; }
.invoice-brand-left h2 { margin: 0 0 6px; font-size: 26px; color: var(--navy); }
.invoice-brand-left p { margin: 2px 0; color: #536173; }
.invoice-meta { min-width: 220px; text-align: right; }
.invoice-label { color: var(--teal); font-weight: 800; letter-spacing: 0; }
.invoice-meta h3 { color: var(--navy); margin: 4px 0; }
.invoice-billto { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.invoice-billto div { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.invoice-billto span { display: block; color: #66758a; font-size: 12px; }
.invoice-items-table thead th { background: var(--navy); color: #fff; }
.invoice-summary { margin-left: auto; max-width: 360px; display: grid; gap: 7px; }
.invoice-summary div { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 5px 0; }
.invoice-summary .grand { background: #eef8f6; border: 1px solid #bfe5df; border-radius: 8px; padding: 10px 12px; font-size: 18px; color: var(--navy); }
.invoice-footer-note { margin-top: 28px; padding-top: 12px; border-top: 1px solid var(--line); color: #66758a; text-align: center; }
.print-body { background: #fff; padding: 24px; }
.invoice-print-card { box-shadow: none; border: none; }
.login-body { min-height: 100vh; display: grid; place-items: center; background: var(--soft); padding: 20px; }
.login-card { width: min(420px, 100%); background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 26px; box-shadow: 0 12px 30px rgba(27,43,65,.08); }
@media print {
    .print-body { padding: 0; }
    .invoice-card { box-shadow: none; border: none; }
}
@media (max-width: 900px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; width: 100%; }
    .sidebar-toggle { display: inline-flex; }
    .invoice-brand-row, .invoice-brand-left { display: block; }
    .invoice-meta { text-align: left; margin-top: 16px; }
    .invoice-billto { grid-template-columns: 1fr; }
}