/* ============================================================
   Remit - site.css
   Professional invoicing application stylesheet
   ============================================================ */

/* ------------------------------------------------------------
   1. CSS Custom Properties (Root Variables)
   ------------------------------------------------------------ */
:root {
    --color-primary:        #2563EB;
    --color-primary-hover:  #1D4ED8;
    --color-primary-light:  #DBEAFE;
    --color-secondary:      #64748B;
    --color-success:        #16A34A;
    --color-success-light:  #DCFCE7;
    --color-danger:         #DC2626;
    --color-danger-light:   #FEE2E2;
    --color-warning:        #D97706;
    --color-warning-light:  #FEF3C7;
    --color-info:           #0891B2;
    --color-info-light:     #CFFAFE;

    /* Sidebar */
    --sidebar-bg:           #1E293B;
    --sidebar-hover-bg:     #334155;
    --sidebar-active-bg:    #2563EB;
    --sidebar-text:         #CBD5E1;
    --sidebar-text-muted:   #94A3B8;
    --sidebar-active-text:  #FFFFFF;
    --sidebar-width:        260px;
    --sidebar-icon-size:    1rem;

    /* Layout */
    --topbar-height:        56px;
    --page-bg:              #F1F5F9;
    --card-bg:              #FFFFFF;
    --border-color:         #E2E8F0;
    --border-radius:        0.5rem;
    --border-radius-sm:     0.25rem;
    --border-radius-lg:     0.75rem;

    /* Typography */
    --font-family:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
    --font-size-base:       0.9375rem;
    --text-color:           #1E293B;
    --text-muted:           #64748B;

    /* Shadows */
    --shadow-sm:            0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md:            0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg:            0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-base:      0.2s ease;
    --transition-sidebar:   0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ------------------------------------------------------------
   2. Base Reset & Global Styles
   ------------------------------------------------------------ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-color);
    background-color: var(--page-bg);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-primary-hover);
}

/* ------------------------------------------------------------
   3. App Layout (Authenticated)
   ------------------------------------------------------------ */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ------------------------------------------------------------
   4. Sidebar
   ------------------------------------------------------------ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 1040;
    overflow-x: hidden;
    overflow-y: auto;
    transition: transform var(--transition-sidebar);
    scrollbar-width: thin;
    scrollbar-color: var(--sidebar-hover-bg) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--sidebar-hover-bg);
    border-radius: 2px;
}

/* Sidebar Header / Brand */
.sidebar-header {
    padding: 1.25rem 1.25rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: #FFFFFF;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    text-decoration: none;
    transition: opacity var(--transition-base);
}

.sidebar-brand:hover {
    color: #FFFFFF;
    opacity: 0.9;
}

.sidebar-brand i {
    font-size: 1.375rem;
    color: var(--color-primary);
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-section-label {
    padding: 0.75rem 1.25rem 0.375rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--sidebar-text-muted);
    margin-top: 0.5rem;
}

.nav-item {
    margin: 0 0.5rem;
}

.nav-item .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.875rem;
    color: var(--sidebar-text);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: background-color var(--transition-base), color var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.nav-item .nav-link i {
    font-size: var(--sidebar-icon-size);
    width: 1.125rem;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.75;
    transition: opacity var(--transition-base);
}

.nav-item .nav-link:hover {
    background-color: var(--sidebar-hover-bg);
    color: #FFFFFF;
}

.nav-item .nav-link:hover i {
    opacity: 1;
}

.nav-item.active .nav-link {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    font-weight: 600;
}

.nav-item.active .nav-link i {
    opacity: 1;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0.875rem 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.5rem 0.75rem;
}

.sidebar-user-avatar i {
    font-size: 1.875rem;
    color: var(--sidebar-text-muted);
    line-height: 1;
}

.sidebar-user-info {
    min-width: 0;
    flex: 1;
}

.sidebar-user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: #FFFFFF;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-email {
    font-size: 0.75rem;
    color: var(--sidebar-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-logout-form {
    display: block;
}

.sidebar-logout-btn {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.5rem 0.875rem;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    color: var(--sidebar-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
    text-align: left;
}

.sidebar-logout-btn:hover {
    background-color: rgba(220, 38, 38, 0.15);
    color: #FCA5A5;
    border-color: rgba(220, 38, 38, 0.3);
}

.sidebar-logout-btn i {
    font-size: 0.875rem;
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1039;
    opacity: 0;
    transition: opacity var(--transition-sidebar);
}

.sidebar-overlay.show {
    opacity: 1;
}

/* ------------------------------------------------------------
   5. Main Content Area
   ------------------------------------------------------------ */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

/* Mobile Top Bar */
.topbar {
    display: none;
    align-items: center;
    gap: 1rem;
    height: var(--topbar-height);
    padding: 0 1rem;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1030;
    box-shadow: var(--shadow-sm);
}

.topbar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: none;
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.125rem;
    transition: background-color var(--transition-base);
    flex-shrink: 0;
}

.topbar-toggle:hover {
    background-color: var(--page-bg);
}

.topbar-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.main-content {
    flex: 1;
    padding: 1.75rem 2rem;
}

/* ------------------------------------------------------------
   6. Page Header
   ------------------------------------------------------------ */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.page-header-left {
    min-width: 0;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 0.125rem;
    letter-spacing: -0.015em;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    flex-wrap: wrap;
}

/* Breadcrumb */
.breadcrumb {
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--text-muted);
}

.breadcrumb-item.active {
    color: var(--text-color);
    font-weight: 500;
}

/* ------------------------------------------------------------
   7. Card Styles
   ------------------------------------------------------------ */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: 1rem 1.25rem;
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.card-header-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.card-body {
    padding: 1.25rem;
}

.card-footer {
    padding: 0.875rem 1.25rem;
    background-color: transparent;
    border-top: 1px solid var(--border-color);
}

/* Stat Cards (Dashboard) */
.stat-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.stat-card-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.stat-card-icon.icon-primary  { background-color: var(--color-primary-light); color: var(--color-primary); }
.stat-card-icon.icon-success  { background-color: var(--color-success-light); color: var(--color-success); }
.stat-card-icon.icon-warning  { background-color: var(--color-warning-light); color: var(--color-warning); }
.stat-card-icon.icon-danger   { background-color: var(--color-danger-light);  color: var(--color-danger);  }
.stat-card-icon.icon-info     { background-color: var(--color-info-light);    color: var(--color-info);    }

.stat-card-body {
    min-width: 0;
    flex: 1;
}

.stat-card-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    margin: 0 0 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stat-card-value {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ------------------------------------------------------------
   8. Table Styles
   ------------------------------------------------------------ */
.table-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin: 0;
}

.table thead th {
    background-color: #F8FAFC;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    text-align: left;
}

.table tbody td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    vertical-align: middle;
}

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

.table tbody tr:hover td {
    background-color: #F8FAFC;
}

.table .actions-cell {
    white-space: nowrap;
    text-align: right;
    width: 1%;
}

/* Empty state */
.table-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.table-empty i {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    display: block;
    opacity: 0.4;
}

.table-empty p {
    margin: 0;
    font-size: 0.9375rem;
}

/* ------------------------------------------------------------
   9. Status Badges
   ------------------------------------------------------------ */
.badge-status {
    display: inline-flex;
    align-items: center;
    gap: 0.3125rem;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.badge-status i {
    font-size: 0.625rem;
}

/* Invoice Statuses */
.badge-draft    { background-color: #F1F5F9; color: #475569; }
.badge-sent     { background-color: var(--color-primary-light); color: var(--color-primary); }
.badge-viewed   { background-color: var(--color-info-light); color: var(--color-info); }
.badge-paid     { background-color: var(--color-success-light); color: var(--color-success); }
.badge-overdue  { background-color: var(--color-danger-light); color: var(--color-danger); }
.badge-cancelled { background-color: #F1F5F9; color: #94A3B8; }

/* Project Statuses */
.badge-active    { background-color: var(--color-success-light); color: var(--color-success); }
.badge-completed { background-color: var(--color-primary-light); color: var(--color-primary); }
.badge-onhold    { background-color: var(--color-warning-light); color: var(--color-warning); }

/* Time Entry Statuses */
.badge-pending  { background-color: var(--color-warning-light); color: var(--color-warning); }
.badge-approved { background-color: var(--color-success-light); color: var(--color-success); }
.badge-rejected { background-color: var(--color-danger-light); color: var(--color-danger); }

/* ------------------------------------------------------------
   10. Button Styles
   ------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 1rem;
    transition: background-color var(--transition-base),
                color var(--transition-base),
                border-color var(--transition-base),
                box-shadow var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
}

.btn-sm {
    padding: 0.3125rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.6875rem 1.5rem;
    font-size: 1rem;
}

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

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

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

.btn-outline-primary:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #FFFFFF;
}

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

.btn-danger:hover {
    background-color: #B91C1C;
    border-color: #B91C1C;
    color: #FFFFFF;
}

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

.btn-outline-danger:hover {
    background-color: var(--color-danger);
    color: #FFFFFF;
}

.btn-secondary {
    background-color: #F1F5F9;
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #E2E8F0;
    border-color: #CBD5E1;
    color: var(--text-color);
}

.btn:focus,
.btn:active:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
    outline: none;
}

/* Icon-only button */
.btn-icon {
    padding: 0.375rem;
    width: 2rem;
    height: 2rem;
    justify-content: center;
}

/* ------------------------------------------------------------
   11. Form Styles
   ------------------------------------------------------------ */
.form-group {
    margin-bottom: 1.125rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.375rem;
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 0.125rem;
}

.form-control,
.form-select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.875rem;
    font-size: 0.9375rem;
    color: var(--text-color);
    background-color: #FFFFFF;
    border: 1px solid #CBD5E1;
    border-radius: var(--border-radius-sm);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    line-height: 1.5;
}

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

.form-control::placeholder {
    color: #94A3B8;
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--color-danger);
}

.form-control.is-invalid:focus,
.form-select.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.invalid-feedback {
    display: none;
    font-size: 0.8125rem;
    color: var(--color-danger);
    margin-top: 0.25rem;
}

.is-invalid ~ .invalid-feedback,
.was-validated :invalid ~ .invalid-feedback {
    display: block;
}

.form-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.input-group .form-control:focus {
    z-index: 3;
}

/* Validation summary */
.validation-summary-errors {
    background-color: var(--color-danger-light);
    border: 1px solid #FECACA;
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #991B1B;
}

.validation-summary-errors ul {
    margin: 0;
    padding-left: 1.25rem;
}

.validation-summary-errors li {
    margin-bottom: 0.125rem;
}

.validation-summary-valid {
    display: none;
}

/* ------------------------------------------------------------
   12. Toast Notifications
   ------------------------------------------------------------ */
.toast-container {
    position: fixed;
    top: 1.25rem;
    right: 1.25rem;
    z-index: 1090;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 360px;
    width: calc(100% - 2.5rem);
}

.toast {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    pointer-events: auto;
}

.toast.hiding {
    opacity: 0;
}

.toast-header {
    display: flex;
    align-items: center;
    padding: 0.625rem 0.875rem;
    background-color: #FAFAFA;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.toast-body {
    padding: 0.75rem 0.875rem;
    font-size: 0.875rem;
    color: var(--text-color);
}

.toast-success {
    border-left: 3px solid var(--color-success);
}

.toast-success .toast-header {
    background-color: #F0FDF4;
    border-bottom-color: #BBF7D0;
}

.toast-error {
    border-left: 3px solid var(--color-danger);
}

.toast-error .toast-header {
    background-color: #FFF5F5;
    border-bottom-color: #FED7D7;
}

/* ------------------------------------------------------------
   13. Auth Pages
   ------------------------------------------------------------ */
.auth-page {
    background-color: var(--page-bg);
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background-color: var(--page-bg);
}

.auth-main {
    width: 100%;
    max-width: 440px;
    margin: 0 auto;
}

.auth-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.auth-card {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2.5rem;
}

.auth-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    margin-bottom: 2rem;
    text-decoration: none;
}

.auth-brand-icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.auth-brand-name {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.015em;
}

.auth-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin: 0 0 0.375rem;
    letter-spacing: -0.015em;
}

.auth-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0 0 1.75rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

/* ------------------------------------------------------------
   14. Alert Styles
   ------------------------------------------------------------ */
.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
}

.alert i {
    font-size: 0.9375rem;
    flex-shrink: 0;
    margin-top: 0.0625rem;
}

.alert-success {
    background-color: var(--color-success-light);
    border-color: #BBF7D0;
    color: #14532D;
}

.alert-danger {
    background-color: var(--color-danger-light);
    border-color: #FECACA;
    color: #7F1D1D;
}

.alert-warning {
    background-color: var(--color-warning-light);
    border-color: #FDE68A;
    color: #78350F;
}

.alert-info {
    background-color: var(--color-info-light);
    border-color: #A5F3FC;
    color: #164E63;
}

/* ------------------------------------------------------------
   15. Modal Enhancements
   ------------------------------------------------------------ */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 1.125rem 1.375rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 1rem;
    font-weight: 600;
}

.modal-body {
    padding: 1.25rem 1.375rem;
}

.modal-footer {
    padding: 0.875rem 1.375rem;
    border-top: 1px solid var(--border-color);
    gap: 0.5rem;
}

/* ------------------------------------------------------------
   16. Utility Classes
   ------------------------------------------------------------ */
.text-primary  { color: var(--color-primary) !important; }
.text-success  { color: var(--color-success) !important; }
.text-danger   { color: var(--color-danger) !important; }
.text-warning  { color: var(--color-warning) !important; }
.text-muted    { color: var(--text-muted) !important; }

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

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.ms-auto { margin-left: auto; }

/* Currency / number formatting */
.text-currency {
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-variant-numeric: tabular-nums;
}

/* Truncate */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Filter / search bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.filter-bar .form-control,
.filter-bar .form-select {
    max-width: 240px;
}

/* Pagination */
.pagination {
    --bs-pagination-active-bg: var(--color-primary);
    --bs-pagination-active-border-color: var(--color-primary);
    --bs-pagination-focus-box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ------------------------------------------------------------
   17. Responsive Breakpoints
   ------------------------------------------------------------ */
@media (max-width: 991.98px) {
    /* Hide sidebar off-canvas on mobile */
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    /* Show overlay */
    .sidebar-overlay {
        display: block;
    }

    /* Remove main content offset */
    .main-wrapper {
        margin-left: 0;
    }

    /* Show mobile topbar */
    .topbar {
        display: flex;
    }

    .main-content {
        padding: 1.25rem 1rem;
    }
}

@media (max-width: 767.98px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-header-actions {
        width: 100%;
    }

    .filter-bar .form-control,
    .filter-bar .form-select {
        max-width: 100%;
        width: 100%;
    }

    .auth-card {
        padding: 1.75rem 1.25rem;
    }

    .toast-container {
        top: auto;
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: none;
        width: auto;
    }
}

@media (max-width: 575.98px) {
    :root {
        --font-size-base: 0.9rem;
    }

    .page-title {
        font-size: 1.25rem;
    }

    .stat-card-value {
        font-size: 1.375rem;
    }

    .table thead th,
    .table tbody td {
        padding: 0.625rem 0.75rem;
    }
}