:root {
    --bg: #100007;
    --sidebar: #200116;
    --surface: #2D0605;
    --surface-2: #200116;
    --surface-hover: #4C0827;
    --glass: rgba(255,255,255,0.04);
    --text: #FFFFFF;
    --text-secondary: #D9D9D9;
    --muted: #A8A8A8;
    --disabled: #6F6F6F;
    --line: rgba(255,255,255,0.08);
    --primary: #80D39B;
    --primary-dark: #6AC788;
    --secondary: #4C0827;
    --success: #80D39B;
    --warning: #F6C453;
    --danger: #E85D75;
    --info: #59A7FF;
    --radius: 18px;
    --radius-sm: 8px;
    --shadow: 0 24px 80px rgba(0,0,0,.35);
    --primary-gradient: linear-gradient(135deg, #100007 0%, #200116 40%, #4C0827 100%);
    --accent-gradient: linear-gradient(135deg, #80D39B 0%, #4C0827 100%);
    --card-gradient: linear-gradient(180deg, #2D0605 0%, #200116 100%);
    --logo-tone: #ffffff;
}

[data-theme="light"] {
    --bg: #fbf7fa;
    --sidebar: #ffffff;
    --surface: #ffffff;
    --surface-2: #f4edf2;
    --surface-hover: #f0dbe7;
    --glass: rgba(255,255,255,0.72);
    --text: #180811;
    --text-secondary: #4e3440;
    --muted: #765c68;
    --disabled: #9f8e96;
    --line: rgba(45,6,5,0.12);
    --primary: #19784c;
    --primary-dark: #12643e;
    --secondary: #4C0827;
    --success: #80D39B;
    --warning: #9a6600;
    --danger: #b51f3d;
    --info: #1266b3;
    --shadow: 0 24px 70px rgba(76,8,39,.12);
    --primary-gradient: linear-gradient(135deg, #fff 0%, #fbf7fa 46%, #f0dbe7 100%);
    --accent-gradient: linear-gradient(135deg, #80D39B 0%, #4C0827 100%);
    --card-gradient: linear-gradient(180deg, #ffffff 0%, #f8f1f5 100%);
    --logo-tone: #111111;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--primary-gradient); color: var(--text); font-family: Inter, system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
.app-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { background: var(--sidebar); border-right: 1px solid var(--line); padding: 20px; position: sticky; top: 0; height: 100vh; box-shadow: 18px 0 50px rgba(0,0,0,.18); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; margin-bottom: 28px; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: var(--radius-sm); background: var(--accent-gradient); color: #100007; }
.nav-logo { width: 36px; height: 36px; border-radius: var(--radius-sm); object-fit: contain; padding: 4px; }
.inline-logo { color: var(--logo-tone); fill: currentColor; transition: color .18s ease, opacity .18s ease; }
.inline-logo [fill="none"] { fill: none; }
.sidebar nav { display: grid; gap: 6px; }
.sidebar nav a { display: flex; align-items: center; gap: 10px; padding: 11px 12px; border-radius: var(--radius-sm); color: var(--muted); font-weight: 600; }
.sidebar nav a.active, .sidebar nav a:hover { background: var(--surface-hover); color: var(--text); }
.sidebar svg, .topbar svg, .btn svg { width: 18px; height: 18px; }
.main { min-width: 0; padding: 18px 24px 36px; }
.topbar { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.global-search { flex: 1; position: relative; }
.global-search svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.global-search input, .form-control, .form-select { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-2); color: var(--text); min-height: 42px; }
.global-search input::placeholder, .form-control::placeholder { color: var(--disabled); opacity: 1; }
.global-search input:focus, .form-control:focus, .form-select:focus { background: var(--surface-2); color: var(--text); border-color: rgba(128,211,155,.55); box-shadow: 0 0 0 .2rem rgba(128,211,155,.14); }
.form-select option { background: var(--surface-2); color: var(--text); }
.global-search input { width: 100%; padding: 10px 14px 10px 42px; }
.icon-btn { border: 1px solid var(--line); background: var(--glass); color: var(--text); border-radius: var(--radius-sm); width: 42px; height: 42px; display: grid; place-items: center; backdrop-filter: blur(18px); }
.icon-btn:hover { background: var(--surface-hover); }
.icon-btn.small { width: 34px; height: 34px; }
.icon-btn.danger { color: var(--danger); }
.user-pill { border: 1px solid var(--line); background: var(--glass); border-radius: var(--radius-sm); padding: 9px 12px; font-weight: 700; backdrop-filter: blur(18px); }
.page-heading { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin-bottom: 20px; }
.page-heading h1 { margin: 0; font-size: 32px; font-weight: 800; letter-spacing: 0; }
.eyebrow { margin: 0 0 4px; color: var(--primary); font-weight: 800; text-transform: uppercase; font-size: 12px; }
.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { border-radius: var(--radius-sm); font-weight: 700; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #100007; }
.btn-primary:hover, .btn-primary:focus { background: var(--primary-dark); border-color: var(--primary-dark); color: #100007; }
.btn-outline-primary { border-color: var(--secondary); color: var(--text); background: rgba(76,8,39,.35); }
.btn-outline-primary:hover, .btn-outline-primary:focus { border-color: var(--primary); background: var(--surface-hover); color: var(--text); }
.metric-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; margin-bottom: 18px; }
.metric-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.metric, .panel { background: var(--card-gradient); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.metric { padding: 16px; display: grid; gap: 8px; min-height: 124px; }
.metric svg { color: var(--primary); }
.metric span { color: var(--muted); font-size: 13px; font-weight: 700; }
.metric strong { font-size: 22px; line-height: 1.1; overflow-wrap: anywhere; }
.content-grid { display: grid; grid-template-columns: 1.7fr .9fr; gap: 16px; }
.panel { padding: 18px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.panel h2, .panel-head h2 { margin: 0; font-size: 18px; font-weight: 800; }
.timeline { display: grid; gap: 12px; }
.timeline div { border-left: 3px solid var(--primary); padding-left: 12px; display: grid; }
.timeline span, .timeline small, td small { color: var(--muted); display: block; }
.module-layout { display: grid; grid-template-columns: 420px 1fr; gap: 16px; align-items: start; }
.module-form { display: grid; gap: 12px; }
.table { --bs-table-color: var(--text); --bs-table-bg: transparent; --bs-table-border-color: var(--line); --bs-table-striped-bg: rgba(255,255,255,.03); color: var(--text); margin-bottom: 0; }
.table th { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.table td, .table th { border-color: var(--line); vertical-align: middle; }
.status { border-radius: 999px; padding: 5px 9px; font-weight: 800; font-size: 12px; background: rgba(255,255,255,.05); }
.status.paid, .status.received { color: var(--success); }
.status.pending, .status.partially_paid, .status.partially_received { color: var(--warning); }
.status.overdue, .status.cancelled { color: var(--danger); }
.badge.text-bg-success { background: rgba(128,211,155,.16) !important; color: var(--success) !important; border: 1px solid rgba(128,211,155,.28); }
.action-row { display: flex; align-items: center; gap: 6px; }
.action-row form { margin: 0; }
.detail-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.detail-grid div { background: rgba(255,255,255,.035); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px; min-height: 76px; }
.detail-grid .wide { grid-column: 1 / -1; }
.detail-grid span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; margin-bottom: 6px; }
.detail-grid strong { display: block; color: var(--text); font-size: 14px; font-weight: 700; overflow-wrap: anywhere; }
.permission-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.permission-grid label { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 10px; color: var(--text-secondary); }
.segmented { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.segmented label { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 10px 12px; color: var(--text-secondary); background: var(--glass); cursor: pointer; }
.segmented label:has(input:checked) { border-color: var(--primary); color: var(--text); background: rgba(128,211,155,.12); }
.settings-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.setting p { margin: 8px 0 0; color: var(--muted); }
.settings-form { margin-bottom: 16px; }
.upload-label { display: grid; gap: 8px; color: var(--muted); font-weight: 800; }
.settings-preview { max-width: 180px; max-height: 72px; object-fit: contain; border-radius: var(--radius-sm); padding: 8px; margin-top: 10px; }
.favicon-preview { width: 48px; height: 48px; }
.signature-preview { max-width: 260px; max-height: 96px; background: #fff; }
.muted-note { color: var(--muted); display: block; margin-top: 8px; }
.invoice-sheet { max-width: 980px; margin: 0 auto; background: #fff; color: #111; border-radius: 4px; padding: 34px; box-shadow: 0 24px 90px rgba(0,0,0,.28); }
.invoice-sheet * { color: #111; }
.invoice-top { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: start; }
.invoice-logo-block { display: flex; align-items: center; min-height: 100px; }
.invoice-logo-block img, .invoice-logo-block svg { width: 220px; height: 92px; object-fit: contain; object-position: left center; }
.invoice-logo-block h2 { margin: 0; color: var(--primary); font-size: 42px; letter-spacing: 0; text-transform: uppercase; }
.invoice-logo-block p { margin: 2px 0 0; color: #8a8a8a; font-size: 14px; }
.invoice-fallback-logo { display: grid; place-items: center; width: 92px; height: 92px; border-radius: 18px; background: var(--primary); color: #fff; font-size: 46px; font-weight: 800; }
.invoice-title-block { text-align: right; min-width: 270px; }
.invoice-title-block p { margin: 0 0 4px; font-size: 20px; }
.invoice-title-block h1 { color: var(--primary); font-size: 34px; margin: 0 0 8px; font-weight: 800; letter-spacing: 0; }
.invoice-title-block dl { display: grid; grid-template-columns: auto 1fr; gap: 5px 8px; margin: 0; font-size: 15px; }
.invoice-title-block dt { font-weight: 800; text-align: right; }
.invoice-title-block dd { margin: 0; text-align: left; }
.invoice-blue-rule { height: 3px; background: var(--primary); margin: 18px 0 0; }
.invoice-address-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; padding: 10px 0 28px; border-bottom: 3px solid var(--primary); }
.invoice-address-grid h3 { color: var(--primary); font-size: 17px; font-style: italic; margin: 0 0 8px; }
.invoice-address-grid p { margin: 4px 0; line-height: 1.28; }
.invoice-lines { width: 100%; border-collapse: collapse; margin-top: 0; font-size: 15px; }
.invoice-lines th { color: var(--primary); text-transform: uppercase; text-align: right; border-bottom: 2px solid var(--primary); padding: 9px 8px; }
.invoice-lines th:nth-child(2), .invoice-lines td:nth-child(2) { text-align: left; }
.invoice-lines td { text-align: right; vertical-align: top; padding: 12px 8px; border-bottom: 2px solid color-mix(in srgb, var(--primary) 78%, white); font-weight: 700; }
.invoice-lines tbody tr td:nth-child(odd) { background: #f2f2f2; }
.invoice-lines td span { display: block; font-weight: 400; margin-top: 5px; }
.invoice-lines .invoice-spacer td { height: 250px; border-bottom: 3px solid var(--primary); background: linear-gradient(90deg, #f7f7f7 0 8%, #fff 8% 34%, #f1f1f1 34% 46%, #fff 46% 56%, #f1f1f1 56% 68%, #fff 68% 78%, #f1f1f1 78% 88%, #fff 88%); }
.invoice-lines tfoot td { color: var(--primary); font-weight: 800; border-bottom: 3px solid var(--primary); }
.invoice-bottom { display: grid; grid-template-columns: 1fr 330px; gap: 30px; padding-top: 18px; }
.invoice-bottom a { color: #0000cc; text-decoration: underline; font-size: 22px; }
.invoice-bottom h4 { color: var(--primary); margin: 10px 0 0; font-size: 15px; }
.signature-line { width: 250px; height: 80px; border-bottom: 3px solid #111; transform: skew(-18deg); margin-top: 8px; }
.digital-signature { display: block; width: 260px; max-height: 92px; object-fit: contain; object-position: left center; margin-top: 8px; }
.invoice-summary { display: grid; gap: 7px; }
.invoice-summary div { display: grid; grid-template-columns: 1fr auto; gap: 14px; }
.invoice-summary span, .invoice-summary strong { color: var(--primary); font-weight: 800; text-transform: uppercase; }
.invoice-note { margin-top: 16px; border-top: 1px solid #eee; padding-top: 12px; }
.invoice-note strong { color: var(--primary); }
.invoice-note p { margin: 2px 0 0; }
.auth-body { min-height: 100vh; display: grid; place-items: center; background: var(--primary-gradient); color: var(--text); }
.auth-panel { width: min(980px, calc(100% - 32px)); display: grid; grid-template-columns: 1.1fr 420px; gap: 22px; align-items: center; }
.auth-copy h1 { font-size: 44px; font-weight: 800; letter-spacing: 0; line-height: 1.05; }
.auth-copy p { color: var(--text-secondary); font-size: 18px; max-width: 560px; }
.login-box { background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; backdrop-filter: blur(18px); display: grid; gap: 10px; box-shadow: var(--shadow); }
.login-box h2 { margin: 0 0 6px; font-weight: 800; }
.alert-danger { background: rgba(232,93,117,.14); border-color: rgba(232,93,117,.28); color: #ffd9df; }

@media (max-width: 1100px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { position: static; height: auto; }
    .sidebar nav { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .module-layout, .content-grid, .auth-panel { grid-template-columns: 1fr; }
    .settings-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
    .main { padding: 14px; }
    .topbar, .page-heading { align-items: stretch; flex-direction: column; }
    .sidebar nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .metric-grid, .metric-grid.three, .settings-grid { grid-template-columns: 1fr; }
    .detail-grid, .permission-grid { grid-template-columns: 1fr; }
    .auth-copy h1 { font-size: 32px; }
    .quick-actions .btn { width: 100%; }
    .invoice-top, .invoice-address-grid, .invoice-bottom, .segmented { grid-template-columns: 1fr; }
    .invoice-title-block { text-align: left; }
    .invoice-lines { font-size: 13px; }
    .invoice-sheet { padding: 18px; }
}

@media print {
    body { background: #fff; color: #111; }
    .sidebar, .topbar, .no-print { display: none !important; }
    .app-shell { display: block; }
    .main { padding: 0; }
    .invoice-sheet { box-shadow: none; border: none; max-width: none; color: #111; background: #fff; padding: 12mm; }
    .invoice-sheet { --logo-tone: #111111; }
}