/* ═══════════════════════════════════════════════════════════
   pk_faktury — minimalistický design
   (postaveno nad Bootstrap 5.3.2, pouze naše komponenty navíc)
   ═══════════════════════════════════════════════════════════ */

:root {
    --bg:           #f9fafb;
    --surface:      #ffffff;
    --border:       #e5e7eb;
    --border-light: #f3f4f6;
    --text:         #111827;
    --text-muted:   #6b7280;
    --text-light:   #9ca3af;
    --accent:       #2563eb;
    --accent-dark:  #1d4ed8;
    --accent-light: #dbeafe;
    --danger:       #ef4444;
    --danger-light: #fef2f2;
    --success:      #22c55e;
    --success-light:#f0fdf4;
    --warning:      #f59e0b;
    --warning-light:#fef3c7;
    --purple:       #9333ea;
    --radius:       12px;
    --radius-sm:    8px;
    --radius-xs:    6px;
    --shadow:       0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:    0 4px 12px rgba(0,0,0,0.08);
    --nav-h:        60px;
    --bottom-nav-h: 64px;
}

/* ── Base override (body styling) ────────────────────────── */
body {
    background: var(--bg) !important;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* ── Desktop top navigation ──────────────────────────────── */
.main-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    height: var(--nav-h);
    margin-bottom: 24px;
}

.main-header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 32px;
}

.main-logo {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    flex-shrink: 0;
    text-decoration: none;
}

.main-logo span { color: var(--accent); }
.main-logo:hover { color: var(--text); }

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.main-nav a {
    padding: 6px 12px;
    border-radius: var(--radius-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.15s, background 0.15s;
    white-space: nowrap;
    text-decoration: none;
}

.main-nav a:hover { color: var(--text); background: var(--border-light); }
.main-nav a.active { color: var(--accent); background: var(--accent-light); font-weight: 600; }

.main-nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.main-nav-actions .logout {
    font-size: 0.875rem;
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: var(--radius-xs);
    text-decoration: none;
}
.main-nav-actions .logout:hover { color: var(--danger); }

/* ── Mobile bottom navigation ────────────────────────────── */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-h);
    background: var(--surface);
    border-top: 1px solid var(--border);
    z-index: 50;
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav-inner {
    display: flex;
    height: 100%;
}

.bottom-nav a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 6px 4px;
    transition: color 0.15s;
    text-decoration: none;
}

.bottom-nav a i {
    font-size: 1.25rem;
    line-height: 1;
}

.bottom-nav a.active { color: var(--text); }
.bottom-nav a.active i { color: var(--accent); }

/* ── Page header ─────────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    margin: 0;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ── KPI cards ───────────────────────────────────────────── */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--accent);
}

.kpi-card.red::before     { background: var(--danger); }
.kpi-card.green::before   { background: var(--success); }
.kpi-card.warning::before { background: var(--warning); }
.kpi-card.purple::before  { background: var(--purple); }

.kpi-title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text);
}

.kpi-value .unit {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 4px;
}

.kpi-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ── Jemné vylepšení Bootstrap komponent ─────────────────── */
.card {
    border-radius: var(--radius) !important;
    border-color: var(--border) !important;
    box-shadow: var(--shadow);
}

.card-header {
    background: var(--surface) !important;
    border-bottom: 1px solid var(--border) !important;
    padding: 14px 18px !important;
    font-weight: 600;
}

.btn {
    border-radius: var(--radius-sm) !important;
    font-weight: 500;
    min-height: 40px;
    padding: 8px 16px;
}

.btn-primary {
    background: var(--accent) !important;
    border-color: var(--accent) !important;
}
.btn-primary:hover {
    background: var(--accent-dark) !important;
    border-color: var(--accent-dark) !important;
}

.btn-outline-primary {
    color: var(--accent) !important;
    border-color: var(--accent) !important;
}
.btn-outline-primary:hover {
    background: var(--accent) !important;
    color: #fff !important;
}

.form-control, .form-select {
    border-radius: var(--radius-sm) !important;
    border-color: var(--border) !important;
    padding: 9px 12px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
}

.table {
    --bs-table-hover-bg: var(--border-light);
}

.table > thead > tr > th {
    font-size: 0.72rem !important;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted) !important;
    background: var(--border-light) !important;
    border-bottom: 1px solid var(--border) !important;
    font-weight: 600;
}

/* Action icon link v tabulkách */
.action-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-xs);
    color: var(--text-muted);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}
.action-icon:hover { background: var(--border-light); color: var(--text); }
.action-icon.danger:hover { background: var(--danger-light); color: var(--danger); }

/* Quick actions grid (dashboard) */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 28px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: box-shadow 0.15s, transform 0.1s, border-color 0.15s;
    text-align: center;
}
.quick-action-btn:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    border-color: #cbd5e1;
    color: var(--text);
}
.quick-action-btn i {
    font-size: 1.75rem;
    color: var(--accent);
}

/* ── Modern Invoice Document Styling ─────────────────────── */
.invoice-card {
    background: #ffffff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    padding: 36px 40px;
    max-width: 850px;
    margin: 0 auto;
    color: #1e293b;
    font-size: 0.9rem;
    line-height: 1.45;
    position: relative;
    overflow: hidden;
}

.invoice-top-accent {
    height: 5px;
    background: linear-gradient(90deg, var(--accent) 0%, #3b82f6 100%);
    margin: -36px -40px 24px -40px;
}

.invoice-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.invoice-title-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-light);
    padding: 3px 8px;
    border-radius: 4px;
    margin-bottom: 6px;
}

.invoice-main-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.02em;
    margin: 0;
    line-height: 1.2;
}

.invoice-number-str {
    font-size: 1.05rem;
    font-weight: 700;
    color: #475569;
}

.invoice-meta-table {
    font-size: 0.85rem;
    border-collapse: collapse;
    margin-left: auto;
}

.invoice-meta-table td {
    padding: 3px 0 3px 16px;
    vertical-align: middle;
}

.invoice-meta-label {
    color: #64748b;
    font-weight: 500;
    font-size: 0.82rem;
}

.invoice-meta-value {
    color: #0f172a;
    font-weight: 700;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.invoice-meta-value.due-date {
    color: #dc2626;
}

/* Supplier & Customer Grid */
.invoice-parties-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.invoice-party-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 14px 16px;
}

.invoice-party-box.supplier-box {
    border-left: 4px solid var(--accent);
}

.invoice-party-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #64748b;
    margin-bottom: 6px;
    display: block;
}

.invoice-party-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 6px;
}

.invoice-party-details {
    font-size: 0.84rem;
    color: #475569;
    line-height: 1.5;
}

/* Items Table */
.invoice-items-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

.invoice-items-table th {
    background: #f1f5f9;
    color: #334155;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 10px 14px;
    border-top: 1px solid #e2e8f0;
    border-bottom: 2px solid #cbd5e1;
}

.invoice-items-table td {
    padding: 11px 14px;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.88rem;
    color: #1e293b;
    vertical-align: middle;
}

.invoice-items-table td.num {
    font-variant-numeric: tabular-nums;
}

/* Payment & Summary Bottom Grid */
.invoice-bottom-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: end;
    margin-bottom: 20px;
}

.invoice-payment-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 14px 16px;
    display: flex;
    gap: 14px;
    align-items: center;
}

.invoice-qr-img {
    width: 105px;
    height: 105px;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    background: #fff;
    padding: 3px;
    flex-shrink: 0;
}

.invoice-bank-details {
    font-size: 0.82rem;
    color: #334155;
    line-height: 1.55;
}

.invoice-summary-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 10px;
    padding: 16px 20px;
    text-align: right;
}

.invoice-summary-label {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #1e40af;
    margin-bottom: 4px;
}

.invoice-summary-total {
    font-size: 1.65rem;
    font-weight: 800;
    color: #1e3a8a;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
}

.invoice-signature-block {
    text-align: right;
    margin-bottom: 12px;
}

.invoice-signature-img {
    max-width: 170px;
    max-height: 75px;
    object-fit: contain;
}

.invoice-footer-legal {
    border-top: 1px solid #e2e8f0;
    padding-top: 12px;
    margin-top: 16px;
    font-size: 0.78rem;
    color: #64748b;
    text-align: center;
}

/* ── Print & Page Setup ───────────────────────────────────── */
@page {
    size: A4 portrait;
    margin: 12mm 15mm 12mm 15mm;
}

@media print {
    /* Hide non-printable elements */
    .no-print,
    .d-print-none,
    .main-header,
    .bottom-nav {
        display: none !important;
    }

    html, body {
        background: #ffffff !important;
        color: #000000 !important;
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
    }

    .container, .container-fluid, .row, [class*="col-"] {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        float: none !important;
    }

    .invoice-card {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
        margin: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        background: #ffffff !important;
    }

    .invoice-top-accent {
        margin: 0 0 20px 0 !important;
    }

    .invoice-parties-grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 16px !important;
    }

    .invoice-bottom-grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 16px !important;
    }

    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    .invoice-header-row,
    .invoice-parties-grid,
    .invoice-items-table,
    .invoice-bottom-grid,
    .invoice-footer-legal {
        page-break-inside: avoid;
    }
}

/* ── Tablet: ≤ 1024px ────────────────────────────────────── */
@media (max-width: 1024px) {
    .main-header-inner { padding: 0 20px; gap: 20px; }
}

/* ── Mobile: ≤ 768px ─────────────────────────────────────── */
@media (max-width: 768px) {
    .bottom-nav { display: block; }
    .main-nav,
    .main-nav-actions { display: none; }

    /* Push main content above bottom nav */
    body > .container,
    body > main,
    body > .container-fluid {
        padding-bottom: calc(var(--bottom-nav-h) + 16px + env(safe-area-inset-bottom)) !important;
    }

    .page-title { font-size: 1.2rem; }
    .kpi-row { gap: 12px; }
    .kpi-value { font-size: 1.4rem; }
    .kpi-card { padding: 16px; }
    .main-header-inner { padding: 0 16px; justify-content: space-between; }

    .invoice-card { padding: 20px 16px; }
    .invoice-top-accent { margin: -20px -16px 16px -16px; }
    .invoice-parties-grid { grid-template-columns: 1fr; }
    .invoice-bottom-grid { grid-template-columns: 1fr; }
    .invoice-header-row { flex-direction: column; gap: 12px; }
    .invoice-meta-table { margin-left: 0; width: 100%; }
    .invoice-meta-table td { padding-left: 0; }
}

/* ── Small mobile: ≤ 480px ───────────────────────────────── */
@media (max-width: 480px) {
    .kpi-row { grid-template-columns: 1fr 1fr; }
    .kpi-value { font-size: 1.2rem; }
    .invoice-payment-box { flex-direction: column; text-align: center; }
}