/* ==========================================================================
   LUMEN BOOKS — PROFESSIONAL THEME LAYER
   Loaded after style.css. Overrides tokens and components for a calmer,
   enterprise-grade finance look (restrained colour, precise typography,
   minimal motion, dense but readable data).
   ========================================================================== */

:root {
    --bg-app: #f5f6f8;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f9fafb;
    --border-color: #e4e7ec;
    --border-strong: #d0d5dd;

    --text-main: #101828;
    --text-muted: #475467;
    --text-light: #667085;

    --primary: #1d4ed8;
    --primary-hover: #1e40af;
    --primary-light: #eff4ff;

    --success: #067647;
    --success-bg: #ecfdf3;
    --danger: #b42318;
    --danger-bg: #fef3f2;
    --warning: #b54708;
    --warning-bg: #fffaeb;

    --sidebar-bg: #0c1a2e;
    --sidebar-text: #a9b4c4;
    --sidebar-hover: rgba(255, 255, 255, 0.06);
    --sidebar-active: #ffffff;
    --sidebar-border: rgba(255, 255, 255, 0.07);

    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
    --shadow-md: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
    --shadow-lg: 0 4px 8px -2px rgba(16, 24, 40, 0.08), 0 2px 4px -2px rgba(16, 24, 40, 0.04);
    --shadow-float: 0 12px 24px -4px rgba(16, 24, 40, 0.12), 0 4px 8px -2px rgba(16, 24, 40, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.92);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --transition: background-color 0.15s ease, border-color 0.15s ease,
                  color 0.15s ease, box-shadow 0.15s ease;
}

/* ---------- Typography ---------- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    font-feature-settings: "cv11", "ss01";
}
h1, h2, h3, h4, h5, h6 { font-family: 'Inter', sans-serif; letter-spacing: -0.011em; }

/* Financial figures align perfectly in columns */
.kpi-value, .vat-value, .num-col, .mono, td, input[type="number"] {
    font-variant-numeric: tabular-nums;
}

/* ---------- Sidebar ---------- */
.sidebar { width: 256px; }
.sidebar-header { height: 64px; padding: 0 1.25rem; }
.logo { font-family: 'Inter', sans-serif; font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }
.logo-icon {
    width: 30px; height: 30px; border-radius: 7px;
    background: #ffffff; color: var(--sidebar-bg);
    box-shadow: none; border: none; font-size: 0.95rem;
}

.sidebar-nav { padding: 0.75rem 0.75rem 1.5rem; gap: 1px; }

.nav-item {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    gap: 0.65rem;
    border-radius: 6px;
}
.nav-item:hover { transform: none; background: var(--sidebar-hover); color: var(--sidebar-active); }
.nav-item.active {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    box-shadow: inset 2px 0 0 #60a5fa;
}

/* Group headers become quiet section labels; groups stay expanded (no hover jumps) */
.nav-dropdown { margin-top: 0.85rem; }
.nav-dropdown > .nav-item:first-child {
    pointer-events: none;
    padding: 0.25rem 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: #6b7a90;
}
.nav-dropdown-content,
.nav-dropdown:hover .nav-dropdown-content {
    display: flex;
    padding-left: 0;
    margin-top: 0.15rem;
    gap: 1px;
}
.nav-dropdown-content .nav-item { padding: 0.45rem 0.75rem; font-size: 0.875rem; color: var(--sidebar-text); }
.nav-dropdown-content .nav-item:hover { background: var(--sidebar-hover); color: #ffffff; transform: none; }
.nav-dropdown-content .nav-item.active { color: #ffffff; background: rgba(255, 255, 255, 0.1); }

.sidebar ::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); }

/* ---------- Topbar ---------- */
.topbar { height: 64px; padding: 0 2rem; backdrop-filter: none; -webkit-backdrop-filter: none; }
.topbar h1 { font-size: 1.125rem; font-weight: 600; }
.user-profile { border-radius: 8px; padding: 0.35rem 0.75rem; box-shadow: none; }
.user-profile:hover { transform: none; background: var(--bg-surface-hover); box-shadow: none; }
.avatar { background: var(--sidebar-bg); width: 28px; height: 28px; font-size: 0.75rem; }

/* ---------- Content & motion ---------- */
.dashboard-content { padding: 1.75rem 2rem; }
.app-view { animation: proFade 0.18s ease-out forwards; }
@keyframes proFade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Cards & KPIs ---------- */
.kpi-grid { gap: 1rem; margin-bottom: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.kpi-card { padding: 1.25rem 1.35rem; gap: 0.4rem; border-radius: var(--radius-lg); }
.kpi-card::before, .kpi-card:hover::before { display: none; }
.kpi-card:hover { transform: none; box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.kpi-title { font-size: 0.75rem; letter-spacing: 0.04em; font-weight: 500; }
.kpi-value { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.02em; }

.card:hover { box-shadow: var(--shadow-sm); }
.card-header { padding: 1rem 1.5rem; background: #ffffff; }
.card-header h2 { font-size: 1rem; }
.card-body { padding: 1.5rem; }
.hero-kpis .hero-card { background: #ffffff; }

/* ---------- Tables ---------- */
.table-container { border-radius: var(--radius-md); }
.erp-table, .data-table { font-size: 0.8125rem; }
.erp-table th, .data-table th {
    background: #f9fafb;
    padding: 0.65rem 1rem;
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}
.erp-table td, .data-table td { padding: 0.7rem 1rem; color: var(--text-main); }
.erp-table tbody tr:nth-child(even), .data-table tbody tr:nth-child(even) { background: #fcfcfd; }
.erp-table tbody tr:hover, .data-table tbody tr:hover { background: var(--primary-light); }

/* ---------- Badges ---------- */
.badge, .status-badge {
    border-radius: 4px;
    padding: 0.15rem 0.5rem;
    font-weight: 500;
    letter-spacing: 0;
    border: 1px solid currentColor;
    border-color: color-mix(in srgb, currentColor 25%, transparent);
}

/* ---------- Forms ---------- */
input[type="text"], input[type="date"], input[type="number"], input[type="email"],
input[type="password"], select, textarea {
    padding: 0.55rem 0.75rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}
input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}
.form-group label { font-size: 0.8125rem; color: var(--text-muted); font-weight: 500; }

/* ---------- Buttons ---------- */
.btn-primary, .btn-success, .btn-secondary {
    padding: 0.55rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover, .btn-success:hover, .btn-secondary:hover { transform: none; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-success:hover { background: #05603a; }
button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ---------- Upload, modals, misc ---------- */
.upload-box { border-width: 1px; padding: 2.25rem 1.5rem; background: #fcfcfd; }
.upload-box:hover, .upload-box.dragover { transform: none; }

.modal-overlay { background: rgba(16, 24, 40, 0.5); backdrop-filter: none; }
.modal-content { border-radius: 12px; animation: proFade 0.15s ease-out; }
.modal-header, .modal-footer { padding: 1rem 1.5rem; }
.modal-body { padding: 1.5rem; }
.modal-footer { background: #f9fafb; gap: 0.75rem; }

.vat-row.total-vat-row,
.vat-row.total-vat-row:hover { background: var(--primary-light); border-color: #c7d7fe; box-shadow: none; }
.ei-title { font-weight: 700; font-size: 2rem; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .app-layout { flex-direction: column; height: auto; min-height: 100vh; overflow: visible; }
    .sidebar { width: 100%; max-height: 50vh; border-right: none; border-bottom: 1px solid var(--sidebar-border); }
    .sidebar-header { height: 56px; }
    .main-content { overflow: visible; }
    .topbar { padding: 0 1rem; }
    .dashboard-content { padding: 1rem; }
    .form-row { flex-wrap: wrap; gap: 1rem; }
    .form-row > * { min-width: 200px; }
    .dashboard-filter-bar, .date-filter-bar { flex-wrap: wrap; gap: 0.75rem; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr; }
    .form-row > * { min-width: 100%; }
    .modal-overlay { padding: 0.75rem; }
    .card-header { flex-wrap: wrap; gap: 0.5rem; }
}