:root {
    --primary: #2D3436;
    --secondary: #0984E3;
    --accent: #00B894;
    --accent-hover: #009a7b;
    --bg-main: #F8F9FA;
    --bg-panel: #FFFFFF;
    --text-main: #2D3436;
    --text-muted: #636E72;
    --border: #DFE6E9;
    --radius: 8px;
    --font-ui: 'Inter', system-ui, sans-serif;

    --inv-width: 800px;
    --inv-padding: 40px;
}

[data-theme="dark"] {
    --bg-main: #1A1A2E;
    --bg-panel: #16213E;
    --text-main: #F5F6FA;
    --text-muted: #A4B0BE;
    --border: #2F3640;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-ui);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    transition: background 0.2s, color 0.2s;
}

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 260px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.sidebar nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    border: none;
    text-align: left;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-btn:hover {
    background-color: var(--bg-main);
    color: var(--text-main);
}

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

.sidebar-bottom {
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.theme-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    padding: 0.5rem;
    border-radius: var(--radius);
    color: var(--text-main);
    cursor: pointer;
    justify-content: center;
}

.theme-btn:hover {
    background: var(--bg-main);
}

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

.view {
    display: none;
    animation: fadeIn 0.2s;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
    font-family: var(--font-ui);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

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

.btn-primary:hover {
    filter: brightness(1.1);
}

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

.btn-secondary:hover {
    background: var(--bg-main);
}

.btn-danger {
    background: #d63031;
    color: #fff;
}

.btn-text {
    background: transparent;
    color: var(--secondary);
    padding: 0.5rem;
}

.btn-text:hover {
    background: rgba(9, 132, 227, 0.1);
}

.w-full {
    width: 100%;
}

/* Form Elements */
.form-panel {
    background: var(--bg-panel);
    padding: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group {
    flex: 1;
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-ui);
}

input,
textarea,
select {
    outline: none;
    transition: border-color 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--secondary);
}

/* Invoice Paper Element (WYSIWYG) */
.invoice-paper {
    background: #fff;
    color: #2D3436;
    /* Always dark text on paper */
    max-width: var(--inv-width);
    margin: 0 auto;
    padding: var(--inv-padding);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    border-radius: 4px;
}

.invoice-paper input,
.invoice-paper textarea,
.invoice-paper select {
    background: transparent;
    border: 1px dashed transparent;
    color: inherit;
    font-family: inherit;
    font-size: inherit;
    width: 100%;
    resize: none;
}

.invoice-paper input:hover,
.invoice-paper textarea:hover,
.invoice-paper select:hover {
    border-color: #DFE6E9;
}

.invoice-paper input:focus,
.invoice-paper textarea:focus,
.invoice-paper select:focus {
    border-color: var(--secondary);
    background: rgba(9, 132, 227, 0.05);
}

.inv-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
}

.sender-info {
    flex: 1;
    max-width: 50%;
}

.h1-input {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.sender-info textarea {
    height: 60px;
    margin-bottom: 0.25rem;
}

.inv-meta {
    text-align: right;
    width: 300px;
}

.inv-meta h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    color: var(--secondary);
}

.meta-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem;
    align-items: center;
    text-align: left;
}

.meta-label {
    color: #636E72;
    font-size: 0.85rem;
    text-align: right;
    padding-right: 0.5rem;
}

.meta-val {
    padding: 0.25rem;
}

.fw-bold {
    font-weight: 600;
}

.inv-bill-to {
    margin-bottom: 2rem;
    max-width: 300px;
}

.inv-bill-to h3 {
    color: #636E72;
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.inv-bill-to textarea {
    height: 60px;
    margin-bottom: 0.25rem;
}

.inv-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.inv-table th {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 2px solid #2D3436;
    color: #2D3436;
    font-size: 0.9rem;
}

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

.inv-table td {
    padding: 0.5rem;
    border-bottom: 1px solid #DFE6E9;
    vertical-align: top;
}

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

.row-qty,
.row-rate {
    width: 100%;
    text-align: right;
}

.row-amt {
    font-weight: 500;
    display: inline-block;
    padding: 0.5rem;
}

.btn-del-row {
    background: transparent;
    border: none;
    color: #d63031;
    cursor: pointer;
    padding: 0.25rem;
    opacity: 0.5;
}

.btn-del-row:hover {
    opacity: 1;
}

.inv-summary-section {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    gap: 2rem;
}

.inv-notes {
    flex: 1;
}

.inv-notes h4 {
    color: #636E72;
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.inv-notes input {
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.inv-notes textarea {
    height: 80px;
    font-size: 0.9rem;
}

.inv-totals {
    width: 300px;
}

.tot-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #DFE6E9;
    font-size: 0.95rem;
}

.tax-controls {
    padding: 0.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: #636E72;
}

.grand-total {
    border-bottom: none;
    border-top: 2px solid #2D3436;
    margin-top: 0.5rem;
    padding-top: 1rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--secondary);
}

/* Data Tables */
.table-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

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

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: var(--bg-main);
    font-weight: 500;
    color: var(--text-muted);
}

.data-table tbody tr:hover {
    background: var(--bg-main);
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-draft {
    background: #dfe6e9;
    color: #2d3436;
}

.status-sent {
    background: #ffeaa7;
    color: #d63031;
}

/* Just colors */
.status-paid {
    background: #55efc4;
    color: #00b894;
}

/* Settings */
.settings-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.settings-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.danger-zone {
    border-color: rgba(214, 48, 49, 0.3);
}

/* Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-panel);
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

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

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-body {
    padding: 1.5rem;
}

/* Toasts */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-main);
    color: var(--bg-main);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    transition: 0.3s;
    opacity: 0;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Print Styles */
@media print {

    .no-print,
    .sidebar,
    .toolbar,
    .form-panel {
        display: none !important;
    }

    .app-container {
        height: auto;
        display: block;
    }

    .main-content {
        padding: 0;
        overflow: visible;
    }

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

    body {
        background: #fff;
        color: #000;
    }

    .invoice-paper input,
    .invoice-paper textarea,
    .invoice-paper select {
        border-color: transparent !important;
        -webkit-appearance: none;
        appearance: none;
    }
}