/* ===== CSS Variables & Design System ===== */
:root {
    /* Color Palette */
    --primary-color: hsl(220, 90%, 56%);
    --primary-hover: hsl(220, 90%, 48%);
    --primary-light: hsl(220, 90%, 96%);
    --secondary-color: hsl(280, 70%, 60%);
    --accent-color: hsl(340, 80%, 60%);

    --success-color: hsl(142, 71%, 45%);
    --warning-color: hsl(38, 92%, 50%);
    --danger-color: hsl(0, 84%, 60%);
    --info-color: hsl(199, 89%, 48%);

    --bg-primary: hsl(220, 20%, 98%);
    --bg-secondary: hsl(0, 0%, 100%);
    --bg-dark: hsl(220, 26%, 14%);
    --bg-card: hsl(0, 0%, 100%);

    --text-primary: hsl(220, 20%, 20%);
    --text-secondary: hsl(220, 10%, 50%);
    --text-light: hsl(0, 0%, 100%);

    --border-color: hsl(220, 20%, 90%);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Loading Screen ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-screen p {
    color: white;
    margin-top: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 500;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== Page Management ===== */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* ===== Login Page ===== */
#login-page {
    min-height: 100vh;
    background: linear-gradient(135deg,
            hsl(220, 90%, 56%) 0%,
            hsl(280, 70%, 60%) 100%);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

#login-page.active {
    display: flex;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== Buttons ===== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    white-space: nowrap;
    /* Prevent text wrapping within the button */
}

@media (max-width: 768px) {
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-danger:hover {
    background: hsl(0, 84%, 50%);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== Dashboard Layout ===== */
#dashboard-page {
    min-height: 100vh;
    display: none;
    grid-template-columns: 260px 1fr;
    grid-template-rows: 70px 1fr;
    grid-template-areas:
        "navbar navbar"
        "sidebar main";
}

#dashboard-page.active {
    display: grid;
}

/* ===== Navbar ===== */
.navbar {
    grid-area: navbar;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.menu-toggle span {
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.navbar-brand h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

@media (max-width: 600px) {
    .user-name {
        display: none;
        /* Hide name on very small screens if preferred, or keep as is */
    }
}

.user-dropdown {
    position: relative;
    cursor: pointer;
}

.user-avatar {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    border: 2px solid white;
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    width: 200px;
    padding: 0.5rem;
    display: none;
    flex-direction: column;
    z-index: 1000;
    border: 1px solid var(--border-color);
    animation: slideDown 0.2s ease-out;
}

.dropdown-menu.active {
    display: flex;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.dropdown-item .icon {
    font-size: 1.1rem;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Sidebar ===== */
.sidebar {
    grid-area: sidebar;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    overflow-y: auto;
}

.sidebar-menu {
    list-style: none;
}

.menu-item {
    padding: 1rem var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.menu-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform var(--transition-fast);
}

.menu-item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.menu-item.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.menu-item.active::before {
    transform: scaleY(1);
}

.menu-item .icon {
    font-size: 1.25rem;
}

/* ===== Main Content ===== */
.main-content {
    grid-area: main;
    padding: var(--spacing-xl);
    overflow-y: auto;
    max-height: calc(100vh - 70px);
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 3rem;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.stat-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ===== Services Grid ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.service-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.service-price {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.service-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===== Invoice Form ===== */
.invoice-form {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

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

.form-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

/* ===== Service Items ===== */
.service-item {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: var(--spacing-md);
    align-items: end;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
}

.remove-item-btn {
    padding: 0.75rem;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.remove-item-btn:hover {
    background: hsl(0, 84%, 50%);
}

/* ===== Signature Pad ===== */
.signature-container {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    width: 100%;
    max-width: 500px;
    margin-top: var(--spacing-sm);
}

#signature-pad {
    width: 100%;
    height: 200px;
    cursor: crosshair;
    display: block;
}

.signature-actions {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
    display: flex;
    justify-content: flex-end;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-sm);
}

.status-voided {
    background: hsl(0, 0%, 90%);
    color: hsl(0, 0%, 40%);
}

/* ===== Invoice Summary ===== */
.invoice-summary {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* V-center the items */
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-base);
}

.discount-input-wrapper {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-primary);
}

.discount-input-wrapper input {
    width: 60px;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    background: white;
}

.discount-input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.summary-row.total {
    border-top: 2px solid var(--border-color);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-color);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ===== Tables ===== */
.invoices-table,
.users-table {
    width: 100%;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.invoices-table thead,
.users-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.invoices-table th,
.users-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.invoices-table td,
.users-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.invoices-table tbody tr,
.users-table tbody tr {
    transition: background var(--transition-fast);
}

.invoices-table tbody tr:hover,
.users-table tbody tr:hover {
    background: var(--primary-light);
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: inline-block;
}

.invoice-action-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Draft list address cell: truncate on PC, full on mobile */
.draft-address-cell {
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Responsive Table Cards ===== */
@media (max-width: 768px) {

    .invoices-table,
    .users-table {
        background: transparent;
        box-shadow: none;
        border-radius: 0;
    }

    .invoices-table thead,
    .users-table thead {
        display: none;
        /* Hide header on mobile */
    }

    .invoices-table tbody,
    .users-table tbody {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .invoices-table tr,
    .users-table tr {
        display: block;
        background: var(--bg-card);
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        margin-bottom: 0;
        /* Managed by gap */
    }

    .invoices-table td,
    .users-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-xs) 0;
        border-bottom: 1px solid var(--border-color);
        text-align: right;
    }

    .invoices-table td:last-child,
    .users-table td:last-child {
        border-bottom: none;
        padding-bottom: 0;
        margin-top: var(--spacing-sm);
        display: block;
        /* Ensure it takes full width for the grid */
    }

    .invoice-action-btns {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        width: 100%;
    }

    .invoice-action-btns .btn {
        width: 100%;
        margin: 0;
        padding: 0.6rem 0.5rem;
        /* Slightly tighter padding for mobile grid */
    }

    .invoices-table td::before,
    .users-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
        margin-right: var(--spacing-md);
        text-align: left;
    }

    .invoices-table td:last-child::before,
    .users-table td:last-child::before {
        content: "";
        /* No label for action button row */
    }

    .invoices-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* On mobile cards, show the full address without truncation */
    .draft-address-cell {
        max-width: none;
        white-space: normal;
        overflow: visible;
        text-overflow: unset;
        text-align: left;
        word-break: break-word;
    }
}

.status-draft {
    background: hsl(38, 92%, 90%);
    color: hsl(38, 92%, 40%);
}

.status-issued {
    background: hsl(199, 89%, 90%);
    color: hsl(199, 89%, 40%);
}

.status-paid {
    background: hsl(142, 71%, 90%);
    color: hsl(142, 71%, 35%);
}

/* ===== Modals ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    height: 100dvh;
    /* Dynamic viewport height for mobile browsers */
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease-out;
}

.modal-content.invoice-preview {
    max-width: 100vw;
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    padding: 0;
    border-radius: 0;
    background: #525659;
    /* Standard PDF viewer background color */
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#invoice-preview-content {
    background: white;
    width: 210mm;
    height: auto;
    min-height: 297mm;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    margin: 2rem auto;
    box-sizing: border-box;
    transform-origin: top center;
    position: relative;
}

/* Scrollable container for the A4 paper */
#invoice-preview-modal .modal-content {
    display: flex;
    flex-direction: column;
}

#invoice-preview-modal #invoice-preview-content-wrapper {
    flex: 1;
    overflow-y: auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Sticky actions at the bottom of the modal */
#invoice-preview-modal .modal-actions {
    margin-top: 0;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 5px));
    background: white;
    border-top: 1px solid var(--border-color);
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 15px;
    z-index: 10;
}

/* Responsive Styling for A4 Preview */
@media (max-width: 220mm) {
    #invoice-preview-content {
        /* Maintain exact PDF layout by scaling the A4 container */
        width: 210mm;
        margin: 1.5rem 0;
        transform: scale(calc((100vw - 30px) / 210mm));
        transform-origin: top center;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }

    #invoice-preview-modal #invoice-preview-content-wrapper {
        align-items: center;
        padding: 0 15px 150px 15px;
        background: #525659;
        overflow-x: hidden;
    }
}

/* Mobile specific centering fixes (iPhone, etc) */
@media (max-width: 768px) {
    .modal-content.invoice-preview {
        height: 100svh;
        /* Small Viewport Height specifically for iOS mobile Safari bars */
        max-height: 100svh;
        width: 100vw;
        max-width: 100vw;
        border-radius: 0;
    }

    #invoice-preview-content {
        /* On mobile, fill as much of the width as possible */
        transform: scale(calc(100vw / 210mm));
        margin: 0;
        box-shadow: none;
    }

    #invoice-preview-modal #invoice-preview-content-wrapper {
        padding: 0;
        padding-bottom: 50vh;
        background: #525659;
    }
}


.close-modal {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    background: none;
    border: none;
    transition: color var(--transition-fast);
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Receipt Upload Options */
.upload-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.upload-option-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.upload-option-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.upload-option-btn .icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.upload-option-btn .label {
    font-weight: 600;
    color: var(--text-primary);
}

@media (max-width: 480px) {
    .upload-options-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .upload-option-btn {
        padding: var(--spacing-md);
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .upload-option-btn .icon {
        font-size: 1.8rem;
        margin-bottom: 0;
    }
}

/* ===== Filter Controls ===== */
.filter-controls {
    display: flex;
    gap: var(--spacing-md);
}

.filter-controls input,
.filter-controls select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
}

/* ===== Error Messages ===== */
.error-message {
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
    display: none;
}

.error-message.active {
    display: block;
}

/* ===== Role-based Visibility ===== */
.admin-only,
.staff-only,
.auditor-only {
    display: none !important;
}

body.role-admin .admin-only,
body.role-admin .staff-only,
body.role-admin .auditor-only,
body.role-staff .staff-only,
body.role-auditor .auditor-only {
    display: block !important;
}

body.role-admin .menu-item.admin-only,
body.role-admin .menu-item.staff-only,
body.role-admin .menu-item.auditor-only,
body.role-staff .menu-item.staff-only,
body.role-auditor .menu-item.auditor-only {
    display: flex !important;
}

body.role-admin .stat-card.admin-only {
    display: flex !important;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    #dashboard-page {
        grid-template-columns: 1fr;
        grid-template-rows: 60px 1fr;
        grid-template-areas:
            "navbar"
            "main";
    }

    .navbar {
        padding: 0 var(--spacing-md);
    }

    .navbar-user .user-name,
    .navbar-user .user-role {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .sidebar {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 260px;
        height: calc(100vh - 60px);
        z-index: 1000;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
        display: block;
    }

    .sidebar.open {
        left: 0;
    }

    .main-content {
        padding: var(--spacing-md);
    }

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

    .service-item {
        grid-template-columns: 1fr 1fr auto;
        gap: var(--spacing-xs) var(--spacing-sm);
        padding: var(--spacing-sm);
    }

    .service-item .form-group:first-child {
        grid-column: 1 / 4;
    }

    .service-item .form-group:not(:first-child) {
        margin-bottom: 0;
    }

    .service-item .form-group label {
        margin-bottom: 2px;
        font-size: 0.75rem;
    }

    .service-item .remove-item-btn {
        margin-top: 18px;
        /* Align with inputs since labels are short */
    }

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

    .invoice-form {
        padding: var(--spacing-sm);
        padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom, 50px));
        /* Clearance for bottom bars */
    }

    .form-actions {
        display: flex;
        flex-direction: row;
        /* Keep horizontal on mobile as per user preference implied */
        flex-wrap: wrap;
        /* But wrap if too wide */
        gap: var(--spacing-xs);
    }

    .form-actions .btn {
        flex: 1;
        /* Allow buttons to expand evenly */
        min-width: 100px;
        /* But don't let them get too small */
    }

    .service-item {
        grid-template-columns: 1fr 1fr;
        grid-template-areas:
            "select select"
            "qty amount"
            "remove remove";
        gap: 0.5rem;
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .service-item .form-group:nth-child(1) {
        grid-area: select;
    }

    .service-item .form-group:nth-child(2) {
        grid-area: qty;
    }

    .service-item .form-group:nth-child(3) {
        grid-area: amount;
    }

    .service-item .form-group:nth-child(4) {
        grid-area: remove;
        display: flex;
        justify-content: flex-end;
        border-top: 1px solid var(--border-color);
        padding-top: 5px;
    }

    .service-item .form-group label {
        font-size: 0.7rem;
        margin-bottom: 3px;
    }

    .service-item .remove-item-btn {
        margin-top: 0;
        padding: 5px 15px;
    }

    .service-item .form-group:nth-child(4) label {
        display: none;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .filter-controls {
        width: 100%;
    }

    .filter-controls input,
    .filter-controls select {
        flex: 1;
    }
}

/* Receipt Thumbnail in Table */
.receipt-thumbnail-wrapper {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 60px;
}

.receipt-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    cursor: zoom-in;
    border: 1px solid var(--border-color);
    transition: transform var(--transition-fast);
}

.receipt-thumbnail:hover {
    transform: scale(1.1);
}

.delete-receipt-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.receipt-thumbnail-wrapper:hover .delete-receipt-btn {
    opacity: 1;
}

.delete-receipt-btn:hover {
    background: hsl(0, 84%, 50%);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .receipt-thumbnail-wrapper {
        width: 80px;
        height: 80px;
    }

    .delete-receipt-btn {
        opacity: 1;
        /* Always show delete button on mobile */
        width: 24px;
        height: 24px;
        font-size: 16px;
    }
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}