/* Invoice App — Custom Design System */
:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-border: #e8eaed;
    --color-text: #1f2328;
    --color-text-secondary: #5f6672;
    --color-text-muted: #8c929d;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-soft: rgba(37, 99, 235, 0.08);
    --color-success: #16a34a;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --color-info: #0891b2;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, Helvetica, Arial, sans-serif;
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --transition: 160ms ease;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    padding: 0;
    min-height: 100vh;
    margin: 0;  
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

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

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}
ul,ol{
    list-style: none;
}
/* Surface cards */
.invoice-container,
.login-container,
.card-surface {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    padding: var(--spacing-8);
    max-width: 1000px;
    margin: 0 auto;
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-6);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.page-header h2 {
    margin-bottom: var(--spacing-1);
}

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

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-6);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.topbar h2 {
    margin: 0;
}

/* Forms */
.form-label {
    font-weight: 500;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-2);
}

.form-control,
.form-select {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
    outline: none;
}

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

.input-group-text {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
}

/* Buttons */
.btn {
    border-radius: var(--radius-sm);
    padding: 0.6rem 1.1rem;
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition);
    border: 1px solid transparent;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

.btn-success:hover {
    background: #15803d;
    border-color: #15803d;
    color: #fff;
    text-decoration: none;
}

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

.btn-danger:hover {
    background: #b91c1c;
    border-color: #b91c1c;
    color: #fff;
    text-decoration: none;
}

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

.btn-warning:hover {
    background: #b45309;
    border-color: #b45309;
    color: #fff;
    text-decoration: none;
}

.btn-info {
    background: var(--color-info);
    border-color: var(--color-info);
    color: #fff;
}

.btn-info:hover {
    background: #0e7490;
    border-color: #0e7490;
    color: #fff;
    text-decoration: none;
}

.btn-secondary {
    background: #f1f3f5;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #e5e7eb;
    border-color: #d1d5db;
    color: var(--color-text);
    text-decoration: none;
}

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

.btn-outline-danger:hover {
    background: rgba(220, 38, 38, 0.06);
    color: var(--color-danger);
    text-decoration: none;
}

.btn-sm {
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
}

.btn:disabled,
.btn.loading {
    opacity: 0.65;
    pointer-events: none;
    cursor: not-allowed;
}

/* Tables */
.table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: 0;
}

.table thead th {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.table tbody td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
    font-size: 0.95rem;
}

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

.table-hover tbody tr:hover {
    background: rgba(0, 0, 0, 0.01);
}

.table-responsive {
    border-radius: var(--radius);
}

/* Status badges */
.badge {
    padding: 0.35em 0.65em;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    line-height: 1.2;
}

.badge-paid {
    background: #dcfce7;
    color: #166534;
}

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

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

.badge-cancelled {
    background: #f3f4f6;
    color: var(--color-text-secondary);
}

/* Login */
body.login-page {
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-10);
    text-align: center;
}

.login-logo {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-4);
    box-shadow: var(--shadow-sm);
}

.login-header h2 {
    margin-bottom: var(--spacing-2);
}

.login-header p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-6);
}

.btn-login {
    width: 100%;
    padding: 0.75rem;
    justify-content: center;
}

.alert {
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.95rem;
}

/* Invoice items */
.section {
    margin-top: var(--spacing-8);
}

.section-title {
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    font-size: 1rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.item-row {
    margin-bottom: var(--spacing-3);
    align-items: center;
}

.item-row input[readonly] {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.btn-remove-item {
    padding: 0.5rem 0.75rem;
}

.total-section {
    margin-top: var(--spacing-6);
    text-align: right;
    font-size: 1rem;
    padding: var(--spacing-5);
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.total-section p {
    margin-bottom: var(--spacing-2);
    color: var(--color-text-secondary);
}

.total-section strong {
    color: var(--color-text);
}

#total {
    font-size: 1.25rem;
    color: var(--color-text);
}

/* Invoice view */
.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-8);
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.invoice-header h2 {
    margin: 0;
    font-size: 1.75rem;
    letter-spacing: -0.02em;
}

.invoice-meta p {
    margin-bottom: var(--spacing-1);
    color: var(--color-text-secondary);
}

.invoice-meta strong {
    color: var(--color-text);
}

.products-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: var(--spacing-6);
}

.products-table th,
.products-table td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.products-table th {
    background: var(--color-bg);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    color: var(--color-text-secondary);
}

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

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

.bank-details {
    font-size: 0.95rem;
}

.bank-details p {
    margin-bottom: var(--spacing-2);
    color: var(--color-text-secondary);
}

.bank-details strong {
    color: var(--color-text);
}

/* Action bars */
.action-bar {
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
    align-items: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    flex-wrap: wrap;
    /* margin-top: var(--spacing-6); */
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--spacing-10) var(--spacing-6);
    color: var(--color-text-secondary);
}

.empty-state h4 {
    color: var(--color-text);
    margin-bottom: var(--spacing-2);
}

/* Modals */
.modal-content {
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-4) var(--spacing-5);
}

.modal-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-4) var(--spacing-5);
}

/* Toast */
.toast-container {
    position: fixed;
    top: var(--spacing-5);
    right: var(--spacing-5);
    z-index: 1080;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.toast {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-4);
    min-width: 280px;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: 0.95rem;
    animation: slideIn 0.2s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Print styles */
@media print {
    body {
        background: #fff;
        padding: 0;
    }

    .topbar,
    .action-bar,
    .action-buttons,
    .btn,
    .modal,
    .toast-container {
        display: none !important;
    }

    .invoice-container {
        box-shadow: none;
        border: none;
        padding: 0;
        max-width: 100%;
    }

    .products-table,
    .total-section {
        border: 1px solid #d1d5db;
    }
}

/* Login extras */
.login-container {
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.login-header h2 {
    margin-bottom: var(--spacing-2);
}

.login-header p {
    color: var(--color-text-secondary);
    margin: 0;
}

.logo-section {
    text-align: center;
    margin-bottom: var(--spacing-4);
}

.logo-section img {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
}

.btn-login {
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-2);
}

/* Invoice preview */
.invoice-preview {
    vertical-align: top !important;
}

.invoice-preview * {
    vertical-align: top !important;
}

p {
    margin-bottom: var(--spacing-2);
}

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

.sidebar {
    width: 240px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-5);
    transition: width 0.2s ease, transform 0.2s ease, padding 0.2s ease;
    overflow: hidden;
    flex-shrink: 0;
    z-index: 100;
}

.app.sidebar-collapsed .sidebar {
    width: 0;
    padding-left: 0;
    padding-right: 0;
    border-right: none;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-8);
}

.sidebar-brand img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.brand-text,
.link-text {
    white-space: nowrap;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
}

.sidebar-link:hover {
    background: var(--color-bg);
    color: var(--color-text);
    text-decoration: none;
}

.sidebar-link.active {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    min-height: 100vh;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-4);
    flex-wrap: wrap;
    max-width: none;
    margin-left: 0;
    margin-right: 0;
    margin-bottom: 0;
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.topbar-title {
    font-size: 1.25rem;
    margin: 0;
    color: var(--color-text);
}

.topbar-user {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.content-wrapper {
    flex: 1;
    padding: var(--spacing-5);
    overflow: auto;
}

.content-wrapper > .container,
.content-wrapper > .invoice-container {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.sidebar-toggle {
    display: inline-flex;
    padding: 0.4rem 0.6rem;
}

/* Mobile sidebar */
@media (max-width: 768px) {
    .app {
        flex-direction: column;
    }
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 260px;
        z-index: 1040;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
        border-right: none;
    }
    .app.sidebar-open .sidebar {
        transform: translateX(0);
    }
    .sidebar-toggle {
        display: inline-flex;
    }
    .main-content {
        width: 100%;
    }
    .topbar {
        padding: var(--spacing-3) var(--spacing-4);
    }
    .topbar-user {
        display: none;
    }
    .topbar-title {
        font-size: 1.1rem;
    }
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-3);
    }

    .invoice-container,
    .login-container {
        padding: var(--spacing-5);
    }

    .page-header,
    .topbar,
    .invoice-header,
    .action-bar,
    .action-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .item-row .col-md-5,
    .item-row .col-md-2,
    .item-row .col-md-1 {
        margin-bottom: var(--spacing-2);
    }

    .total-section {
        text-align: left;
        margin-top: var(--spacing-4);
    }
}

/* Action dropdown */
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--color-text-secondary);
    padding: 0.35rem 0.6rem;
    box-shadow: none;
}

.btn-ghost:hover,
.btn-ghost:focus {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
    transform: none;
    box-shadow: none;
}

/* Desktop table overflow so dropdowns are not clipped */
@media (min-width: 769px) {
    .table-responsive {
        overflow: visible;
    }
}

.action-buttons .dropdown .btn {
    margin: 0;
}

.dropdown-menu {
    display: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2);
    min-width: 160px;
    background: var(--color-surface);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    border-radius: var(--radius-sm);
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--color-text);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.dropdown-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.dropdown-item.text-danger:hover {
    background: #fee2e2;
    color: var(--color-danger);
}

.dropdown-divider {
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-2) 0;
}
.delete-invoice{
    color: var(--color-danger);
    background: transparent;
    border: none;
    padding: 0.35rem 0.6rem;
    width: 100%;
    font-weight: 500;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 11050;
    padding: var(--spacing-4);
    overflow: hidden;
}

.modal.show {
    display: flex;
}

.modal-dialog {
    width: 100%;
    max-width: 460px;
    pointer-events: auto;
}

.modal-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
    gap: var(--spacing-3);
}

.modal-title {
    margin: 0;
}

.modal-body {
    margin-bottom: var(--spacing-5);
    color: var(--color-text-secondary);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}