/* ==========================================================================
   Invoicey - Professional Corporate Design System
   Rules: Light Theme, Zero Gradients, Zero Pills, Pure SVG Icons
   ========================================================================== */

:root {
    /* Primary Brand Palette - Solid Colors (Zero Gradients) */
    --color-primary-hue: 220;
    --color-primary-50: hsl(var(--color-primary-hue, 220), 85%, 96%);
    --color-primary-100: hsl(var(--color-primary-hue, 220), 85%, 90%);
    --color-primary-200: hsl(var(--color-primary-hue, 220), 85%, 80%);
    --color-primary-300: hsl(var(--color-primary-hue, 220), 80%, 70%);
    --color-primary-400: hsl(var(--color-primary-hue, 220), 75%, 58%);
    --color-primary-500: hsl(var(--color-primary-hue, 220), 75%, 48%);
    --color-primary-600: hsl(var(--color-primary-hue, 220), 80%, 42%);
    --color-primary-700: hsl(var(--color-primary-hue, 220), 80%, 34%);
    --color-primary-800: hsl(var(--color-primary-hue, 220), 80%, 25%);
    --color-primary-900: hsl(var(--color-primary-hue, 220), 80%, 16%);

    /* Neutral & Surface Palette */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-hover: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e1;
    --color-text-main: #0f172a;
    --color-text-body: #334155;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;

    /* Semantic Accents (Solid Colors) */
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;
    --color-danger-border: #fecaca;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-success-border: #bbf7d0;
    --color-warning: #d97706;
    --color-warning-bg: #fffbeb;
    --color-warning-border: #fde68a;
    --color-info: #0284c7;
    --color-info-bg: #f0f9ff;
    --color-info-border: #bae6fd;

    /* Geometric Radius (Strictly No Pills) */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    /* Clean Elevated Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.08);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);

    --transition: all 0.18s ease-in-out;
}

/* Base Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .app-name, .logo-title {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-weight: 700;
    color: var(--color-text-main);
    letter-spacing: -0.015em;
}

/* App Container Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    background: var(--color-bg);
}

/* ==========================================================================
   Desktop Sidebar
   ========================================================================== */
.sidebar {
    width: 250px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px 16px;
    z-index: 100;
    transition: width 0.25s ease, padding 0.25s ease;
    position: relative;
    flex-shrink: 0;
}

.app-container.collapsed .sidebar {
    width: 72px;
    padding: 20px 10px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-text-main);
    white-space: nowrap;
    overflow: hidden;
}

.app-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    overflow: hidden;
}

.app-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.app-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-text-main);
    transition: opacity 0.2s, visibility 0.2s;
}

.sidebar-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-main);
    border-color: var(--color-border-dark);
}

.app-container.collapsed .app-name,
.app-container.collapsed .nav-item span,
.app-container.collapsed .sidebar-badge,
.app-container.collapsed .user-profile-details {
    display: none;
}

.app-container.collapsed .sidebar-header {
    justify-content: center;
}

.app-container.collapsed .sidebar-toggle {
    margin-top: 8px;
}

/* Nav links */
.nav-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-body);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
    background: transparent;
    width: 100%;
    text-align: left;
}

.app-container.collapsed .nav-item {
    justify-content: center;
    padding: 10px 0;
}

.nav-item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-main);
}

.nav-item.active {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    border-color: var(--color-primary-200);
    font-weight: 600;
}

.nav-item .icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-badge {
    margin-left: auto;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    background: var(--color-border);
    color: var(--color-text-muted);
}

.nav-item.active .sidebar-badge {
    background: var(--color-primary-600);
    color: #ffffff;
}

/* Sidebar Footer & User Profile */
.sidebar-footer {
    border-top: 1px solid var(--color-border);
    padding-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-status-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: var(--transition);
}

.user-status-card:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-dark);
}

.user-profile-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-biz-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-plan-tag {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-primary-700);
}

/* ==========================================================================
   Main Content Area & Top Header
   ========================================================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--color-bg);
}

/* Top App Bar */
.top-app-bar {
    height: 60px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    flex-shrink: 0;
}

.app-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 6px;
    cursor: pointer;
    color: var(--color-text-main);
}

.page-title-group h1 {
    font-size: 1.25rem;
    margin: 0;
}

.app-bar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.env-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 600;
    background: var(--color-surface-hover);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.env-status-badge.cloud-active {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success-border);
}

.env-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
}

/* Scrollable Viewport Content */
.content-scrollable {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* Tab Content Transitions */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: contentFade 0.2s ease-in-out;
}

@keyframes contentFade {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Cards & Layout Elements
   ========================================================================== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Header Row in Views */
.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* Controls Toolbar */
.toolbar-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* ==========================================================================
   Buttons & Interactive Elements (Strictly No Pills)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary-600);
    color: #ffffff;
    border-color: var(--color-primary-600);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-700);
    border-color: var(--color-primary-700);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
    color: var(--color-text-main);
    border-color: var(--color-border-dark);
}

.btn-accent {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    border-color: var(--color-primary-200);
}

.btn-accent:hover:not(:disabled) {
    background: var(--color-primary-100);
    color: var(--color-primary-800);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger);
    color: #ffffff;
    border-color: var(--color-danger);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-hover);
    color: var(--color-text-main);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 11px 22px;
    font-size: 0.95rem;
}

.btn-block {
    width: 100%;
}

.icon-sm {
    width: 15px;
    height: 15px;
}

.icon-md {
    width: 18px;
    height: 18px;
}

/* Segmented Toggle Control (Geometric - No Pills) */
.segmented-control {
    display: inline-flex;
    background: var(--color-surface-hover);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.segmented-btn {
    padding: 6px 14px;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.segmented-btn:hover {
    color: var(--color-text-main);
}

.segmented-btn.active {
    background: var(--color-surface);
    color: var(--color-primary-700);
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--color-border);
}

/* ==========================================================================
   Form Controls
   ========================================================================== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-body);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.input-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
textarea,
select {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    padding: 9px 12px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--color-text-main);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    outline: none;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-light);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--color-text-body);
    user-select: none;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary-600);
    cursor: pointer;
}

/* ==========================================================================
   Invoice Editor Grid & Live Preview
   ========================================================================== */
.editor-workspace {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 20px;
    align-items: start;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

/* Mobile View Switcher (Visible only on mobile/tablet) */
.mobile-view-switcher {
    display: none;
    margin-bottom: 16px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.mobile-view-switcher .segmented-control {
    width: 100%;
    max-width: 100%;
}

.mobile-view-switcher .segmented-btn {
    flex: 1;
    justify-content: center;
    padding: 10px;
}

/* Editor Form Pane */
.editor-form-pane {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.section-divider {
    border-bottom: 1px solid var(--color-border);
    margin: 16px 0;
}

/* Line Items Container & Row Layout */
.line-items-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.line-item-header {
    display: grid;
    grid-template-columns: 1fr 75px 100px 32px;
    gap: 8px;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-muted);
    padding: 0 4px;
}

.line-item-row {
    display: flex;
    gap: 8px;
    align-items: center;
    background: var(--color-surface);
}

.line-item-desc {
    flex: 1;
}

.line-item-fields {
    display: flex;
    align-items: center;
    gap: 8px;
}

.line-item-row.mode-itemized .line-item-fields input[type="number"]:first-of-type {
    width: 75px;
}

.line-item-row.mode-itemized .line-item-fields input[type="number"]:nth-of-type(2) {
    width: 100px;
}

.line-item-row.mode-item-total .line-item-fields input[type="number"] {
    width: 120px;
}

.btn-icon-danger {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
    flex-shrink: 0;
}

.btn-icon-danger:hover {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: var(--color-danger-border);
}

/* Preview Pane Layout */
.preview-pane-wrapper {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.preview-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    box-shadow: var(--shadow-sm);
}

.preview-viewport {
    background: #475569;
    border-radius: var(--radius-md);
    padding: 24px;
    overflow-x: auto;
    display: flex;
    justify-content: center;
    min-height: 600px;
    max-height: calc(100vh - 170px);
    overflow-y: auto;
}

/* Document Paper Template (Solid Light Theme) */
.invoice-sheet {
    background: #ffffff;
    color: #1e293b;
    width: 100%;
    max-width: 720px;
    min-height: 880px;
    padding: 44px;
    box-shadow: var(--shadow-xl);
    font-size: 0.88rem;
    line-height: 1.5;
    position: relative;
    border-radius: var(--radius-xs);
}

/* Invoice Header in Paper */
.sheet-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 24px;
}

.sheet-biz-info {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.sheet-biz-logo {
    max-width: 90px;
    max-height: 70px;
    object-fit: contain;
    border-radius: var(--radius-xs);
}

.sheet-biz-details h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--color-text-main);
    margin-bottom: 2px;
}

.sheet-biz-details p {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.sheet-meta {
    text-align: right;
}

.sheet-badge-type {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary-700);
    background: var(--color-primary-50);
    border: 1px solid var(--color-primary-200);
    padding: 3px 10px;
    border-radius: var(--radius-xs);
    margin-bottom: 6px;
}

.sheet-doc-number {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-text-main);
}

.sheet-doc-date {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

/* Client & Details Section in Paper */
.sheet-bill-to {
    margin-bottom: 28px;
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    padding: 14px 18px;
}

.sheet-section-title {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.sheet-client-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text-main);
}

.sheet-contact-line {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--color-text-body);
    margin-top: 3px;
}

.sheet-contact-line svg {
    width: 13px;
    height: 13px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

/* Table in Paper */
.sheet-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 28px;
}

.sheet-table th {
    background: #f1f5f9;
    color: #475569;
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 10px 12px;
    border-bottom: 2px solid var(--color-border);
    border-top: 1px solid var(--color-border);
    text-align: left;
}

.sheet-table td {
    padding: 12px;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
    font-size: 0.86rem;
}

/* Totals & Notes Section in Paper */
.sheet-footer-grid {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 30px;
    margin-top: 20px;
}

.sheet-notes-card {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    padding: 12px 14px;
}

.sheet-payment-info {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed var(--color-border);
    font-size: 0.8rem;
    color: var(--color-text-body);
}

.sheet-totals-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sheet-total-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.86rem;
    color: var(--color-text-body);
    padding: 4px 0;
}

.sheet-total-row.grand {
    border-top: 2px solid var(--color-primary-600);
    padding-top: 8px;
    margin-top: 4px;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary-700);
}

.sheet-total-row.balance {
    border-top: 1px solid var(--color-border);
    padding-top: 6px;
    font-weight: 800;
    color: var(--color-danger);
}

/* ==========================================================================
   History & Client Management Lists
   ========================================================================== */
.search-input-group {
    position: relative;
    max-width: 320px;
    width: 100%;
}

.search-input-group svg {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
}

.search-input-group input {
    padding-left: 34px;
}

.list-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.list-item-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: var(--transition);
}

.list-item-card:hover {
    border-color: var(--color-border-dark);
    box-shadow: var(--shadow-xs);
}

.list-item-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.list-item-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.list-item-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-main);
}

.list-item-sub {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 2px;
}

.list-item-right {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
}

.list-item-amount {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-primary-700);
}

/* Empty State Box */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
}

.empty-state-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    color: var(--color-text-light);
}

/* ==========================================================================
   Backups & Cloud Sync Section
   ========================================================================== */
.backup-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.backup-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.backup-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.backup-card p {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    margin-bottom: 18px;
    line-height: 1.5;
}

/* ==========================================================================
   Modals & Overlays (Light Theme, No Pills)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.45);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
    overflow-y: auto;
}

.modal-overlay.active {
    display: flex;
    animation: modalFade 0.2s ease-in-out;
}

@keyframes modalFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-container {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-container.modal-lg {
    max-width: 620px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.modal-header h2 {
    font-size: 1.15rem;
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    color: var(--color-text-main);
    background: var(--color-surface-hover);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px 20px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

/* Auth Modal Specifics */
.auth-nav {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 20px;
}

/* ==========================================================================
   Full-Screen Web Gatekeeper Portal & Desktop Onboarding
   ========================================================================== */
.gatekeeper-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--color-bg);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow-y: auto;
}

.gatekeeper-container {
    width: 100%;
    max-width: 460px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 32px;
}

.gatekeeper-brand {
    text-align: center;
    margin-bottom: 24px;
}

.gatekeeper-brand .app-logo {
    margin: 0 auto 12px;
    width: 44px;
    height: 44px;
}

.gatekeeper-brand h2 {
    font-size: 1.4rem;
    color: var(--color-text-main);
    margin-bottom: 4px;
}

.gatekeeper-brand p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
}

.trial-highlight-badge {
    background: var(--color-primary-50);
    border: 1px solid var(--color-primary-200);
    color: var(--color-primary-700);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
}

.trial-highlight-badge svg {
    width: 16px;
    height: 16px;
    color: var(--color-primary-600);
    flex-shrink: 0;
}

.auth-nav-btn {
    flex: 1;
    text-align: center;
    padding: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.auth-nav-btn.active {
    color: var(--color-primary-700);
    border-bottom-color: var(--color-primary-600);
}

/* Subscription Pricing Card */
.pricing-banner-card {
    background: var(--color-primary-50);
    border: 1px solid var(--color-primary-200);
    border-radius: var(--radius-sm);
    padding: 18px;
    margin-bottom: 18px;
    text-align: center;
}

.pricing-amount {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-primary-700);
    margin: 6px 0;
}

.pricing-features-list {
    list-style: none;
    text-align: left;
    margin: 12px 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.86rem;
    color: var(--color-text-body);
}

.pricing-features-list li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pricing-features-list svg {
    color: var(--color-success);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Dual Export Options Grid */
.export-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 16px;
}

.export-option-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
}

.export-option-card:hover, .export-option-card.selected {
    border-color: var(--color-primary-600);
    background: var(--color-primary-50);
}

.export-option-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-100);
    color: var(--color-primary-700);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Color Swatches for Palette (Solid - No Gradient) */
.color-swatches-grid {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.color-swatch-item {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition);
}

.color-swatch-item:hover, .color-swatch-item.active {
    transform: scale(1.1);
    border-color: var(--color-text-main);
    box-shadow: var(--shadow-sm);
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 360px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    background: #ffffff;
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    animation: toastSlideIn 0.25s ease-in-out;
}

.toast.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast.toast-danger {
    border-left: 4px solid var(--color-danger);
}

.toast.toast-warning {
    border-left: 4px solid var(--color-warning);
}

@keyframes toastSlideIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Mobile Bottom Navigation Bar
   ========================================================================== */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 56px;
    background: #ffffff;
    border-top: 1px solid var(--color-border);
    z-index: 150;
    justify-content: space-around;
    align-items: center;
    padding: 0 4px;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-decoration: none;
    background: transparent;
    border: none;
    padding: 6px 8px;
    cursor: pointer;
    flex: 1;
    transition: var(--transition);
}

.mobile-nav-item .icon {
    width: 18px;
    height: 18px;
}

.mobile-nav-item.active {
    color: var(--color-primary-700);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .editor-workspace {
        grid-template-columns: 1fr;
    }

    .mobile-view-switcher {
        display: block;
    }

    .preview-pane-wrapper {
        position: static;
        display: none; /* Controlled by segmented switcher on tablet/mobile */
    }

    .preview-pane-wrapper.mobile-active {
        display: flex;
    }

    .editor-form-pane.mobile-hidden {
        display: none;
    }

    .preview-viewport {
        max-height: none;
        min-height: auto;
        padding: 16px;
    }
}

@media (max-width: 768px) {
    .app-container {
        width: 100vw;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .main-content {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    .sidebar {
        display: none; /* Hidden on mobile; bottom nav is active */
    }

    .mobile-menu-btn {
        display: none;
    }

    .mobile-bottom-nav {
        display: flex;
    }

    .content-scrollable {
        padding: 10px 8px;
        padding-bottom: 96px; /* Safe space above mobile bottom nav */
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
        box-sizing: border-box;
    }

    .top-app-bar {
        padding: 0 12px;
        height: 52px;
    }

    .top-app-bar .page-title-group h1 {
        font-size: 1.05rem;
    }

    .top-app-bar .env-status-badge {
        display: none; /* Hide verbose desktop badge on small phones */
    }

    .editor-workspace {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    .editor-form-pane {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    .card {
        padding: 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
    }

    /* Stack document type and pricing mode cleanly */
    .card-header {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .card-header .segmented-control {
        width: 100%;
    }

    .card-header .segmented-btn {
        flex: 1;
        justify-content: center;
        padding: 8px 6px;
        font-size: 0.8rem;
    }

    .card-header > div:last-child {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .card-header #pricing-mode {
        flex: 1;
        width: 100%;
    }

    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }

    .backup-grid {
        grid-template-columns: 1fr;
    }

    .export-options-grid {
        grid-template-columns: 1fr;
    }

    /* Line items cards on mobile */
    .line-item-header {
        display: none;
    }

    .line-item-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        background: #ffffff;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        padding: 10px;
        margin-bottom: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .line-item-desc {
        width: 100%;
        max-width: 100%;
    }

    .line-item-fields {
        display: flex;
        align-items: center;
        gap: 8px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .line-item-fields input,
    .line-item-row.mode-itemized .line-item-fields input[type="number"]:first-of-type,
    .line-item-row.mode-itemized .line-item-fields input[type="number"]:nth-of-type(2),
    .line-item-row.mode-item-total .line-item-fields input[type="number"] {
        flex: 1 1 0 !important;
        min-width: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
    }

    .line-item-fields .btn-icon-danger {
        flex-shrink: 0;
        width: 38px;
        height: 38px;
        background: var(--color-danger-bg);
        color: var(--color-danger);
        border: 1px solid var(--color-danger-border);
    }

    /* Modals & Gatekeeper on Mobile */
    .modal-container {
        max-width: calc(100vw - 20px) !important;
        margin: 10px auto;
    }

    .gatekeeper-overlay {
        padding: 12px;
    }

    .gatekeeper-container {
        padding: 20px 14px;
        max-width: 100%;
    }

    /* Mobile-Fit Live Preview */
    .preview-viewport {
        padding: 8px 4px;
        background: #334155;
        overflow-x: hidden;
    }

    .invoice-sheet {
        padding: 14px 10px;
        width: 100%;
        max-width: 100%;
        min-height: auto;
        box-sizing: border-box;
        box-shadow: none;
        font-size: 0.78rem;
    }

    .sheet-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding-bottom: 16px;
        margin-bottom: 16px;
    }

    .sheet-biz-info {
        gap: 8px;
    }

    .sheet-biz-logo {
        max-width: 55px;
        max-height: 45px;
    }

    .sheet-biz-details h2 {
        font-size: 1.15rem;
    }

    .sheet-meta {
        text-align: left;
    }

    .sheet-table th, .sheet-table td {
        padding: 8px 4px;
        font-size: 0.74rem;
    }

    .sheet-footer-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .sheet-totals-box {
        border-top: 1px solid var(--color-border);
        padding-top: 10px;
    }
}