/* ============================================
   Invoice App - CSS Stylesheet
   ============================================ */

/* Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #6b7280;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #06b6d4;

    --color-bg: #f9fafb;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;

    --sidebar-width: 240px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}

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

a:hover {
    text-decoration: underline;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: #1e293b;
    color: #f1f5f9;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #334155;
}

.sidebar-header .logo {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: #94a3b8;
    text-decoration: none;
    transition: all 0.15s;
}

.nav-item:hover {
    background: #334155;
    color: #f1f5f9;
    text-decoration: none;
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
}

.nav-icon {
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #334155;
    font-size: 0.875rem;
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-name {
    color: #e2e8f0;
}

.logout-link {
    color: #94a3b8;
    font-size: 0.8rem;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.breadcrumb {
    font-size: 1rem;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.page-actions {
    display: flex;
    gap: 0.5rem;
}

/* Cards */
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.card-header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.form-card {
    max-width: 100%;
}

.form-card .card-header {
    padding: 1.25rem 1.5rem;
}

.form-card form {
    padding: 1.5rem;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none !important;
}

.btn:hover {
    background: #f3f4f6;
}

.btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
}

.btn-secondary {
    background: #f3f4f6;
    border-color: #d1d5db;
}

.btn-success {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.btn-warning {
    background: var(--color-warning);
    border-color: var(--color-warning);
    color: white;
}

.btn-danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: white;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-primary);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 500;
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    transition: border-color 0.15s;
}

/* Hide number input spinners */
.no-spinner::-webkit-outer-spin-button,
.no-spinner::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.no-spinner[type="number"] {
    -moz-appearance: textfield;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control.is-invalid {
    border-color: var(--color-danger);
}

.error-text {
    color: var(--color-danger);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    display: block;
}

.form-help {
    color: var(--color-text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.form-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.form-section:last-of-type {
    border-bottom: none;
}

.form-section h3 {
    margin: 0 0 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding-top: 1rem;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.table tbody td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table .text-right {
    text-align: right;
}

.table .strong {
    font-weight: 600;
    color: var(--color-text);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: 4px;
    background: #e5e7eb;
    color: #374151;
}

.badge-draft {
    background: #fef3c7;
    color: #92400e;
}

.badge-finalized {
    background: #d1fae5;
    color: #065f46;
}

.badge-void {
    background: #fee2e2;
    color: #991b1b;
}

.badge-locked {
    background: #dbeafe;
    color: #1e40af;
    margin-left: 0.25rem;
}

.badge-lg {
    font-size: 0.85rem;
    padding: 0.35rem 0.75rem;
}

.badge-audit {
    background: #f3f4f6;
    color: #374151;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
    text-align: center;
}

.stat-card.accent {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card.accent .stat-label {
    color: rgba(255, 255, 255, 0.8);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

/* Detail Grid */
.detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.detail-list dt {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 1rem;
}

.detail-list dt:first-child {
    margin-top: 0;
}

.detail-list dd {
    margin: 0.25rem 0 0;
    color: var(--color-text);
}

/* Mini Stats */
.mini-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    text-align: center;
}

.mini-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.mini-stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Invoice Detail */
.invoice-header-card {
    margin-bottom: 1.5rem;
}

.invoice-status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.invoice-number {
    font-size: 1.25rem;
}

.invoice-meta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 1.5rem;
}

.meta-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.meta-value {
    display: block;
    margin-top: 0.25rem;
    font-weight: 500;
}

/* Payment Summary */
.payment-summary-card {
    background: #f8fafc;
}

.payment-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: center;
}

.summary-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

/* Line Items Table */
.line-items-table tfoot .subtotal-row td {
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.line-items-table tfoot .total-row td {
    font-size: 1.1rem;
}

/* Actions */
.invoice-actions .card-body {
    display: flex;
    justify-content: space-between;
}

/* Invoice Toolbar */
.invoice-toolbar {
    margin-bottom: 1.5rem;
}

.invoice-toolbar .card-body {
    padding: 1rem 1.5rem;
}

.toolbar-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.inline-form {
    display: inline-flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.finalize-fields {
    display: flex;
    gap: 0.5rem;
}

.finalize-fields .form-group {
    margin-bottom: 0;
}

.finalize-fields label {
    font-size: 0.7rem;
}

.finalize-fields .form-control {
    padding: 0.35rem 0.5rem;
    font-size: 0.8rem;
}

/* Danger Zone */
.danger-zone {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-muted);
}

.empty-message {
    color: var(--color-text-muted);
    text-align: center;
    padding: 1rem;
}

/* Filters */
.filters-bar {
    background: var(--color-surface);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.filters-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
}

.filter-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.filter-group .form-control {
    min-width: 150px;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

/* Text Utilities */
.text-right {
    text-align: right;
}

.text-muted {
    color: var(--color-text-muted);
}

.text-success {
    color: var(--color-success);
}

.text-warning {
    color: var(--color-warning);
}

.text-danger {
    color: var(--color-danger);
}

.text-info {
    color: var(--color-info);
}

/* Report Grid */
.report-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.pagination-info {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Audit Details */
.audit-details summary {
    cursor: pointer;
    color: var(--color-primary);
    font-size: 0.8rem;
}

.audit-details pre {
    margin: 0.5rem 0 0;
    padding: 0.5rem;
    background: #f3f4f6;
    border-radius: 4px;
    font-size: 0.7rem;
    overflow-x: auto;
    max-height: 200px;
}

/* Line Items Edit Table */
.line-items-edit-table .form-control {
    padding: 0.35rem 0.5rem;
    font-size: 0.85rem;
}

.line-items-edit-table .line-amount {
    font-weight: 500;
}

.line-items-edit-table tfoot tr:first-child td {
    padding-top: 1rem;
}

.line-items-edit-table .totals-row td {
    border-top: 2px solid var(--color-border);
    padding-top: 1rem;
}

/* Auth Page */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.auth-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
}

.auth-header p {
    margin: 0;
    color: var(--color-text-muted);
}

.auth-form .btn-block {
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar-header .logo,
    .nav-item span:not(.nav-icon),
    .user-name {
        display: none;
    }

    .nav-item {
        justify-content: center;
        padding: 0.75rem;
    }

    .main-content {
        margin-left: 60px;
        padding: 1rem;
    }

    .dashboard-grid,
    .detail-grid,
    .report-grid,
    .settings-grid {
        grid-template-columns: 1fr;
    }

    .invoice-meta-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .payment-summary-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}