:root {
    --color-bg: #f4f5f7;
    --color-surface: #ffffff;
    --color-border: #e2e5ea;
    --color-text: #1f2430;
    --color-text-muted: #6b7280;
    --color-primary: #2f6feb;
    --color-primary-dark: #2456bf;
    --color-danger: #dc3545;
    --color-success: #1a9b5a;
    --color-warning: #b8860b;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: #171b26;
    color: #cdd3e0;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-logo {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    padding: 22px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 12px 0;
}

.sidebar-nav a {
    color: #cdd3e0;
    padding: 12px 20px;
    text-decoration: none;
    font-weight: 500;
    border-left: 3px solid transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

/* Rood bolletje in de zijbalk: aantal openstaande todo's */
.nav-badge {
    background: var(--color-danger);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

td .nav-badge { margin-left: 6px; vertical-align: middle; }

.sidebar-nav a:hover {
    background: rgba(255,255,255,0.06);
    text-decoration: none;
}

.sidebar-nav a.active {
    background: rgba(47, 111, 235, 0.15);
    border-left-color: var(--color-primary);
    color: #fff;
}

.main-content {
    flex: 1;
    padding: 32px 40px;
    width: 100%;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    gap: 16px;
    flex-wrap: wrap;
}

.page-header h1 {
    margin: 0;
    font-size: 24px;
}

.page-header .subtitle {
    color: var(--color-text-muted);
    margin-top: 4px;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.stat-card .label {
    color: var(--color-text-muted);
    font-size: 13px;
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 26px;
    font-weight: 700;
}

.stat-card .sublabel {
    color: var(--color-text-muted);
    font-size: 12px;
    margin-top: 6px;
}

.stat-card-success .value { color: var(--color-success); }
.stat-card-danger .value { color: var(--color-danger); }
.stat-card-danger { border-color: rgba(220, 53, 69, 0.3); }

.stat-grid-secondary {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.stat-card-small {
    padding: 14px 16px;
}

.stat-card-small .value {
    font-size: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

.btn:hover { background: var(--color-primary-dark); text-decoration: none; }

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover { background: #f0f1f3; }

.btn-secondary.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.btn-danger { background: var(--color-danger); }
.btn-danger:hover { background: #b8232f; }

.btn-small { padding: 6px 12px; font-size: 13px; }

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--color-border);
}

th {
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

tbody tr:hover { background: #fafbfc; }

.table-actions { display: flex; gap: 12px; }

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-concept { background: #eef0f3; color: #555; }
.badge-definitief { background: #fdf3e0; color: var(--color-warning); }
.badge-verzonden { background: #e7f0ff; color: var(--color-primary-dark); }
.badge-betaald { background: #e5f7ec; color: var(--color-success); }
.badge-vervallen { background: #fdeaea; color: var(--color-danger); }
.badge-actief { background: #e5f7ec; color: var(--color-success); }
.badge-gepauzeerd { background: #fdf3e0; color: var(--color-warning); }
.badge-opgezegd { background: #eef0f3; color: #555; }
.badge-te-factureren { background: #e7f0ff; color: var(--color-primary-dark); margin-left: 6px; }
.badge-gepland { background: #eef0f3; color: #555; }
.badge-gefactureerd { background: #e7f0ff; color: var(--color-primary-dark); }
.badge-niet_betaald { background: #fdeaea; color: var(--color-danger); }
.badge-overgeslagen { background: #f4f5f7; color: var(--color-text-muted); }
.badge-verlopen { background: #fdeaea; color: var(--color-danger); }

.form-group {
    margin-bottom: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 13px;
}

input[type=text], input[type=email], input[type=tel], input[type=date], input[type=number], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: #fff;
    color: var(--color-text);
}

textarea { resize: vertical; min-height: 80px; }

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 111, 235, 0.15);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.flash {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-weight: 500;
}

.flash-success { background: #e5f7ec; color: var(--color-success); }
.flash-error { background: #fdeaea; color: var(--color-danger); }

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--color-text-muted);
}

.search-bar {
    margin-bottom: 20px;
}

.search-bar input {
    max-width: 320px;
}

/* Factuurregels tabel in het formulier */
#items-table th, #items-table td { padding: 8px; }
#items-table input, #items-table select { padding: 8px; }
#items-table .col-handle { width: 28px; text-align: center; }
#items-table .col-omschrijving { width: 38%; }
#items-table .col-aantal, #items-table .col-prijs, #items-table .col-btw { width: 15%; }
#items-table .col-actie { width: 5%; text-align: center; }
#items-table .remove-row {
    background: none;
    border: none;
    color: var(--color-danger);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
}

#items-table .drag-handle {
    display: inline-block;
    color: var(--color-text-muted);
    cursor: grab;
    letter-spacing: -3px;
    user-select: none;
    font-size: 14px;
    padding: 4px 6px;
}

#items-table .item-row.dragging {
    opacity: 0.4;
    background: #f0f1f3;
}

#items-table .item-row {
    background: var(--color-surface);
}

.totals-box {
    margin-top: 20px;
    margin-left: auto;
    max-width: 320px;
}

.totals-box .row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
}

.totals-box .row.total {
    border-top: 1px solid var(--color-border);
    margin-top: 6px;
    padding-top: 12px;
    font-weight: 700;
    font-size: 16px;
}

/* Factuur-weergave / print layout */
.invoice-view {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px;
}

.invoice-view-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 32px;
}

.invoice-view-header h2 {
    margin: 0 0 4px;
}

.invoice-parties {
    display: flex;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 40px;
}

.invoice-parties h4 {
    color: var(--color-text-muted);
    font-size: 12px;
    text-transform: uppercase;
    margin: 0 0 8px;
}

.invoice-meta {
    display: grid;
    grid-template-columns: auto auto;
    gap: 4px 16px;
    font-size: 13px;
}

.invoice-view table td, .invoice-view table th { padding: 10px 8px; }

.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    align-items: center;
}

/* Een keuzelijst in de filterbalk gaat rechts staan, los van de filterknoppen. */
.filter-bar .status-form { margin-left: auto; }

.status-form select {
    display: inline-block;
    width: auto;
}

/* Todo's per klant */
.todo-form {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.todo-form input[type=text] { flex: 1; min-width: 220px; }
.todo-form input[type=date] { width: auto; }
.todo-form select { width: auto; min-width: 160px; }

.todo-list {
    list-style: none;
    margin: 20px 0 0;
    padding: 0;
}

.todo-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
}

.todo-body { flex: 1; }

.todo-titel { font-weight: 600; }

.todo-omschrijving {
    color: var(--color-text-muted);
    margin-top: 2px;
    white-space: pre-wrap;
}

.todo-meta {
    color: var(--color-text-muted);
    font-size: 12px;
    margin-top: 4px;
}

.todo-toggle button {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: #fff;
    color: var(--color-success);
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
}

.todo-toggle button:hover { border-color: var(--color-primary); }

.todo-list-flush { margin-top: 0; }

.todo-list-flush .todo-item:first-child {
    border-top: none;
    padding-top: 0;
}

.todo-acties {
    display: flex;
    align-items: center;
    gap: 10px;
}

.todo-bewerken { font-size: 13px; }

.todo-verwijderen {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
}

.todo-verwijderen:hover { color: var(--color-danger); }

.todo-done .todo-titel {
    text-decoration: line-through;
    color: var(--color-text-muted);
    font-weight: 500;
}

.todo-done .todo-toggle button { background: #e5f7ec; border-color: #bfe6cf; }

@media (max-width: 800px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; }
    .main-content { padding: 20px; }
    .form-row { grid-template-columns: 1fr; }
    .invoice-parties { flex-direction: column; gap: 16px; }
}