/* ==========================================================================
   TradesInvoice — Clean, Professional, Mobile-First Stylesheet
   No framework. Pure CSS. Works at 375px width.
   ========================================================================== */

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

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-warning: #ca8a04;
    --color-header-bg: #1e293b;
    --color-header-text: #f1f5f9;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}

/* Dark mode overrides */
[data-theme="dark"] {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    --color-error-bg: #450a0a;
    --color-success-bg: #052e16;
    --color-header-bg: #020617;
    --color-header-text: #f1f5f9;
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.4);
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */
.navbar {
    background: var(--color-header-bg);
    color: var(--color-header-text);
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-header-text);
    text-decoration: none;
    white-space: nowrap;
}

.nav-brand:hover {
    text-decoration: none;
    opacity: 0.9;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a {
    color: var(--color-header-text);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.nav-links a:hover {
    text-decoration: none;
    opacity: 0.8;
}

.logout-btn {
    background: none;
    border: none;
    color: var(--color-header-text);
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    padding: 0;
}

.logout-btn:hover {
    opacity: 0.8;
}

/* Theme toggle */
.theme-toggle {
    background: none;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--color-header-text);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    line-height: 1;
    transition: background 0.15s;
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.1);
}

.btn-nav {
    background: var(--color-primary);
    color: #fff !important;
    padding: 0.4rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
}

.btn-nav:hover {
    background: var(--color-primary-dark);
    opacity: 1 !important;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* --------------------------------------------------------------------------
   Hero (Landing)
   -------------------------------------------------------------------------- */
.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.hero-content {
    max-width: 680px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.btn-cta {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    padding: 0.85rem 2rem;
    border-radius: var(--radius);
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: background 0.15s;
}

.btn-cta:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Trades Grid (Landing)
   -------------------------------------------------------------------------- */
.trades-section {
    padding: 2rem 0;
}

.trades-section h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.trades-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.trade-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.trade-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.trade-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
}

.trade-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Bottom CTA */
.cta-bottom {
    text-align: center;
    padding: 3rem 0;
}

.cta-bottom h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.cta-bottom p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

/* --------------------------------------------------------------------------
   Auth Pages
   -------------------------------------------------------------------------- */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 0;
}

.auth-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow);
}

.auth-card h1 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.auth-subtitle {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fecaca;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
}

.optional {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.form-group input,
.form-group select {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-primary {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

.btn-full {
    width: 100%;
    text-align: center;
}

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Dashboard
   -------------------------------------------------------------------------- */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.dashboard-header h1 {
    font-size: 1.25rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.recent-invoices h2 {
    font-size: 1.15rem;
    margin-bottom: 1rem;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table th,
.data-table td {
    padding: 0.7rem 0.85rem;
    text-align: left;
    font-size: 0.9rem;
    white-space: nowrap;
}

.data-table th {
    background: var(--color-bg);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
    border-bottom: 2px solid var(--color-border);
}

.data-table td {
    border-bottom: 1px solid var(--color-border);
}

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

.status-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-draft {
    background: #e2e8f0;
    color: #475569;
}

.status-sent {
    background: #dbeafe;
    color: #1d4ed8;
}

.status-paid {
    background: #dcfce7;
    color: #16a34a;
}

.status-overdue {
    background: #fef2f2;
    color: #dc2626;
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-header-bg);
    color: var(--color-header-text);
    text-align: center;
    padding: 1.25rem 1rem;
    font-size: 0.85rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Responsive — Mobile (< 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
    .nav-container {
        height: auto;
        padding: 0.6rem 0;
        flex-direction: column;
        gap: 0.5rem;
    }

    /* Landing page — keeps brand left, login right */
    .navbar-guest .nav-container {
        flex-direction: row;
        justify-content: space-between;
    }

    .navbar-guest .nav-brand {
        font-size: 1rem;
    }

    .navbar-guest .nav-links {
        gap: 0.5rem;
    }

    .navbar-guest .btn-nav {
        padding: 0.3rem 0.75rem;
        font-size: 0.85rem;
    }

    .hero {
        padding: 2rem 0 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }

    .stat-card {
        padding: 0.75rem;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .auth-card {
        padding: 1.25rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.5rem 0.6rem;
        font-size: 0.8rem;
    }
}

/* Very small screens (375px) */
@media (max-width: 400px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

/* --------------------------------------------------------------------------
   Filter Tabs
   -------------------------------------------------------------------------- */
.filter-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-tab {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all 0.15s;
}

.filter-tab:hover {
    text-decoration: none;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-tab.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Invoice Form
   -------------------------------------------------------------------------- */
.invoice-form-page {
    max-width: 900px;
}

.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.form-card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.form-row {
    margin-bottom: 1rem;
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.form-group textarea {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    resize: vertical;
    min-height: 60px;
    transition: border-color 0.15s;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Line item inputs */
.line-item-row input {
    width: 100%;
    padding: 0.5rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}

.line-item-row input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12);
}

.line-item-row .row-num {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
    vertical-align: middle;
}

.line-item-row .amount-cell {
    font-weight: 600;
    font-size: 0.9rem;
    text-align: right;
    white-space: nowrap;
}

.line-item-row .desc-input {
    min-width: 180px;
}

.line-item-row .qty-input {
    min-width: 70px;
}

.line-item-row .price-input {
    min-width: 100px;
}

.btn-remove-row {
    background: none;
    border: none;
    color: var(--color-error);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    line-height: 1;
}

.btn-remove-row:hover {
    background: var(--color-error-bg);
}

.btn-danger-sm {
    background: none;
    border: none;
    color: var(--color-error);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    line-height: 1;
    font-weight: 700;
}

.btn-danger-sm:hover {
    background: var(--color-error-bg);
}

.btn-secondary {
    display: inline-block;
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

.btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
    text-decoration: none;
}

.btn-danger {
    display: inline-block;
    background: var(--color-error);
    color: #fff;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

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

.btn-success {
    display: inline-block;
    background: var(--color-success);
    color: #fff;
    border: none;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

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

.btn-sm {
    display: inline-block;
    background: var(--color-bg);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s;
}

.btn-sm:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    text-decoration: none;
}

.btn-sm-paid {
    color: #16a34a;
    border-color: #16a34a;
    background: #f0fdf4;
}

.btn-sm-paid:hover {
    background: #16a34a;
    color: #fff;
    border-color: #16a34a;
}

.invoice-totals {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 2px solid var(--color-border);
    max-width: 320px;
    margin-left: auto;
}

.invoice-totals .total-row {
    display: flex;
    justify-content: space-between;
    padding: 0.35rem 0;
    font-size: 0.9rem;
}

.invoice-totals .total-grand {
    font-size: 1.1rem;
    font-weight: 700;
    border-top: 1px solid var(--color-border);
    margin-top: 0.25rem;
    padding-top: 0.5rem;
    color: var(--color-primary);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* --------------------------------------------------------------------------
   Invoice View
   -------------------------------------------------------------------------- */
.invoice-view {
    max-width: 900px;
    margin: 0 auto;
}

.invoice-view-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.invoice-view-header h1 {
    font-size: 1.35rem;
    margin-bottom: 0.35rem;
}

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

.status-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.invoice-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.invoice-meta {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.invoice-from h2 {
    font-size: 1.2rem;
    margin-bottom: 0.15rem;
}

.invoice-to h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.invoice-to .client-name {
    font-size: 1.05rem;
    font-weight: 600;
}

.meta-label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.15rem;
}

.invoice-dates {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.date-item {
    font-size: 0.9rem;
}

.invoice-table th.right,
.invoice-table td.right {
    text-align: right;
}

.invoice-totals-view {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 2px solid var(--color-border);
    max-width: 320px;
    margin-left: auto;
}

.invoice-totals-view .total-row {
    display: flex;
    justify-content: space-between;
    padding: 0.35rem 0;
    font-size: 0.9rem;
}

.invoice-totals-view .total-grand {
    font-size: 1.1rem;
    font-weight: 700;
    border-top: 1px solid var(--color-border);
    margin-top: 0.25rem;
    padding-top: 0.5rem;
    color: var(--color-primary);
}

.invoice-notes {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.invoice-notes h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.invoice-notes p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

/* --------------------------------------------------------------------------
   Invoice — Business Details & Bank Details
   -------------------------------------------------------------------------- */
.invoice-business {
    margin-bottom: 1.25rem;
}

.invoice-business .business-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.15rem;
}

.invoice-business .business-address {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-line;
}

.invoice-business .reg-numbers {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

.invoice-business .reg-numbers span {
    margin-right: 1.25rem;
}

.bank-details-box {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-top: 1.5rem;
}

.bank-details-box h4 {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.bank-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
}

.bank-detail-item {
    font-size: 0.9rem;
}

.bank-detail-item .bank-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.15rem;
}

.bank-detail-item .bank-value {
    font-weight: 600;
    font-family: "SF Mono", "Consolas", "Monaco", monospace;
    letter-spacing: 0.03em;
}

.bank-verification-note {
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.78rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.bank-details-missing {
    background: #fef3c7;
    border: 1px dashed #f59e0b;
    border-radius: var(--radius);
    padding: 0.75rem 1.25rem;
    margin-top: 1.5rem;
    text-align: center;
}
.bank-details-missing h4 {
    font-size: 0.82rem;
    color: #92400e;
    margin-bottom: 0.35rem;
}
.bank-details-missing p {
    font-size: 0.85rem;
    color: #78350f;
    margin: 0;
}
.bank-details-missing a {
    color: #b45309;
    font-weight: 600;
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Account Settings Page
   -------------------------------------------------------------------------- */
.account-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 1.5rem 0;
}

.account-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow);
}

.account-card h1 {
    font-size: 1.35rem;
    margin-bottom: 0.25rem;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #bbf7d0;
}

.form-fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.form-fieldset legend {
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0 0.5rem;
}

.fieldset-hint {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

/* SMTP help section — collapsible provider instructions */
.smtp-help {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.smtp-help summary {
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--color-primary);
    font-weight: 500;
    user-select: none;
    padding: 0.25rem 0;
}

.smtp-help summary:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.smtp-help-content {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.smtp-help-provider {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
}

.smtp-help-provider h4 {
    font-size: 0.92rem;
    margin-bottom: 0.5rem;
}

.smtp-help-provider ol {
    padding-left: 1.25rem;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.smtp-help-provider li {
    margin-bottom: 0.15rem;
}

.smtp-help-provider code {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.1rem 0.4rem;
    font-size: 0.82rem;
    font-family: "SF Mono", "Fira Code", "Fira Mono", monospace;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group textarea {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    resize: vertical;
    min-height: 60px;
    transition: border-color 0.15s;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* --------------------------------------------------------------------------
   Search Bar
   -------------------------------------------------------------------------- */
.search-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.search-bar form {
    flex: 1;
}

.search-input {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-clear {
    white-space: nowrap;
    font-size: 0.85rem;
}

/* Tax Summary Card */
.tax-summary-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    border-left: 4px solid #22c55e;
}
.tax-summary-stats {
    display: flex;
    gap: 2rem;
}
.tax-stat {
    display: flex;
    flex-direction: column;
}
.tax-stat-label {
    font-size: 0.75rem;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.tax-stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
}
.tax-stat-sub {
    font-size: 0.8rem;
    color: var(--color-muted);
}
.tax-download {
    white-space: nowrap;
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Send Button & Modal
   -------------------------------------------------------------------------- */
.btn-send {
    display: inline-block;
    background: #16a34a;
    color: #fff;
    border: none;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
    font-family: inherit;
}

.btn-send:hover {
    background: #15803d;
}

.send-modal {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    background: var(--color-surface);
    color: var(--color-text);
    margin: 15vh auto 0 auto;
}

.send-modal::backdrop {
    background: rgba(0, 0, 0, 0.4);
}

.send-modal h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.modal-close {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
}

.modal-hint {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin: 0.75rem 0;
}

/* --------------------------------------------------------------------------
   Required & Optional labels
   -------------------------------------------------------------------------- */
.required {
    color: var(--color-error);
}

/* --------------------------------------------------------------------------
   Client Page
   -------------------------------------------------------------------------- */
.client-page {
    max-width: 900px;
    margin: 0 auto;
}

.client-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

/* --------------------------------------------------------------------------
   Danger buttons (small)
   -------------------------------------------------------------------------- */
.btn-danger-sm {
    display: inline-block;
    background: none;
    color: var(--color-error);
    border: 1px solid var(--color-error);
    padding: 0.3rem 0.65rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s;
}

.btn-danger-sm:hover {
    background: var(--color-error-bg);
}

/* --------------------------------------------------------------------------
   Delete Confirmation
   -------------------------------------------------------------------------- */
.delete-page {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 3rem 0;
}

.confirm-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2.5rem;
    max-width: 480px;
    width: 100%;
    box-shadow: var(--shadow);
    text-align: center;
}

.confirm-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.confirm-card h1 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.confirm-card p {
    color: var(--color-text-muted);
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.confirm-client,
.confirm-total {
    font-size: 0.95rem;
}

.confirm-warning {
    color: var(--color-error) !important;
    font-weight: 600;
    margin-top: 1rem !important;
}

.confirm-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* --------------------------------------------------------------------------
   Responsive — Filters & Forms
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
    .form-row-3 {
        grid-template-columns: 1fr;
    }

    .invoice-meta {
        flex-direction: column;
        gap: 1rem;
    }

    .invoice-dates {
        gap: 1rem;
    }

    .invoice-totals,
    .invoice-totals-view {
        max-width: 100%;
    }

    .invoice-card {
        padding: 1.25rem;
    }

    .invoice-view-header {
        flex-direction: column;
    }

    .confirm-card {
        padding: 1.5rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn-primary,
    .form-actions .btn-secondary {
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-row-3 {
        grid-template-columns: 1fr;
    }

    .invoice-actions {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .data-table {
        font-size: 0.82rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.4rem 0.5rem;
    }

    .checkbox-label {
        font-size: 0.88rem;
        line-height: 1.4;
    }
}

/* ==========================================================================
   Dashboard with Charts
   ========================================================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.stat-warning .stat-value {
    color: #ef4444;
}

.stat-recurring .stat-value {
    color: #0d9488;
}

.charts-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.chart-card h2 {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.chart-wide {
    /* takes 2fr of 1fr 2fr grid */
}

.chart-card canvas {
    max-width: 100%;
    height: auto !important;
}

.recent-section h2 {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.empty-hint {
    color: var(--color-text-muted);
    text-align: center;
    padding: 2rem;
}

/* Status badge for estimate type */
.status-badge.status-estimate {
    background: #fef3c7;
    color: #92400e;
}
.status-badge.status-recurring {
    background: #dbeafe;
    color: #1e40af;
}

/* Checkbox label styling */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
}

.consent-group {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

/* Filter tabs sub-style */
.filter-tabs-sub {
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.filter-sep {
    width: 1px;
    background: var(--color-border);
    margin: 0 0.25rem;
    align-self: stretch;
}

.badge-recurring {
    font-size: 0.75rem;
    cursor: help;
}

@media (max-width: 640px) {
    .charts-row {
        grid-template-columns: 1fr;
    }
}

/* --------------------------------------------------------------------------
   FAQ Page
   -------------------------------------------------------------------------- */
.faq-page {
    max-width: 800px;
    margin: 0 auto;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-item summary {
    padding: 1rem 1.25rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    user-select: none;
    color: var(--color-text);
    transition: background 0.15s;
}

.faq-item summary:hover {
    background: var(--color-bg-hover);
}

.faq-item[open] summary {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-hover);
}

.faq-answer {
    padding: 1rem 1.25rem 1.25rem;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

.faq-answer p {
    margin: 0 0 0.75rem;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-answer ul,
.faq-answer ol {
    margin: 0 0 0.75rem;
    padding-left: 1.25rem;
}

.faq-answer li {
    margin-bottom: 0.35rem;
}

.faq-answer code {
    background: var(--color-bg-muted);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.88em;
}

.faq-answer a {
    color: var(--color-primary);
    font-weight: 500;
}

.faq-disclaimer {
    font-size: 0.82rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border);
}

.faq-footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
    color: var(--color-text-muted);
    font-size: 0.88rem;
}

/* ==========================================================================
   Welcome Banner — first-time user onboarding
   ========================================================================== */

.welcome-banner {
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

[data-theme="dark"] .welcome-banner {
    background: linear-gradient(135deg, #1e293b 0%, #172554 100%);
}

.welcome-banner__header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.welcome-banner__emoji {
    font-size: 2rem;
    line-height: 1;
}

.welcome-banner__title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.15rem;
}

.welcome-banner__subtitle {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin: 0;
}

.welcome-banner__steps {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.welcome-banner__step {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.85rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--color-text);
    transition: box-shadow 0.15s, border-color 0.15s, transform 0.1s;
}

.welcome-banner__step:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.12);
    transform: translateX(2px);
}

.welcome-banner__step:active {
    transform: translateX(0);
}

.welcome-banner__step-number {
    flex-shrink: 0;
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: 50%;
}

.welcome-banner__step-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.welcome-banner__step-text strong {
    font-size: 0.92rem;
    font-weight: 600;
}

.welcome-banner__step-text small {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.welcome-banner__step-arrow {
    flex-shrink: 0;
    font-size: 1rem;
    color: var(--color-text-muted);
    transition: color 0.15s;
}

.welcome-banner__step:hover .welcome-banner__step-arrow {
    color: var(--color-primary);
}

/* Desktop: side-by-side layout */
@media (min-width: 768px) {
    .welcome-banner__steps {
        flex-direction: row;
    }

    .welcome-banner__step {
        flex: 1;
        flex-direction: column;
        text-align: center;
        padding: 1rem 0.75rem;
        gap: 0.5rem;
    }

    .welcome-banner__step-arrow {
        display: none;
    }

    .welcome-banner__step-number {
        width: 2rem;
        height: 2rem;
        font-size: 0.9rem;
    }

    .welcome-banner__step-text strong {
        font-size: 0.85rem;
    }
}