/* ==========================================
   Modern Accounting System - Main Stylesheet
   ========================================== */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --border-color: #dee2e6;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --transition: all 0.3s ease;
}

/* ==========================================
   Base Styles
   ========================================== */

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    padding-top: 70px;
    background-color: #f5f7fa;
    color: #2c3e50;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
}

/* ==========================================
   Navigation
   ========================================== */

.navbar {
    background: linear-gradient(135deg, #1f3a5f 0%, #2c5282 100%) !important;
    box-shadow: var(--shadow-md);
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #e0e7ff 0%, #f0f4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding-bottom: 0.5rem !important;
}

.navbar-nav .nav-link:hover {
    color: #fff !important;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--info-color) 0%, var(--primary-color) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after {
    transform: scaleX(1);
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: 0.75rem;
    animation: slideIn 0.2s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    color: #2c3e50;
    transition: var(--transition);
    border-left: 3px solid transparent;
    padding-left: 1.2rem;
}

.dropdown-item:hover {
    background-color: #e8f1f8;
    border-left-color: var(--primary-color);
    color: var(--primary-color);
}

/* ==========================================
   Container & Layout
   ========================================== */

.container {
    max-width: 1200px;
}

.py-4 {
    padding-top: 2rem !important;
    padding-bottom: 2rem !important;
}

/* ==========================================
   Headers
   ========================================== */

h1 {
    color: #1f3a5f;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 2rem;
    letter-spacing: -0.5px;
}

h2 {
    color: #2c5282;
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

h3 {
    color: #2c5282;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

h4, h5, h6 {
    color: #2c5282;
    font-weight: 600;
}

/* ==========================================
   Text Utilities
   ========================================== */

.text-muted {
    color: #6c757d !important;
    font-size: 0.95rem;
}

.text-center {
    text-align: center;
}

.text-end {
    text-align: right;
}

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

/* ==========================================
   Buttons
   ========================================== */

.btn {
    border: none;
    border-radius: 0.4rem;
    font-weight: 600;
    transition: var(--transition);
    text-transform: none;
    letter-spacing: 0.5px;
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0b5cdb 100%);
    color: #fff;
    box-shadow: 0 2px 4px rgba(13, 110, 253, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0b5cdb 0%, #0a58ca 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
    color: #fff;
}

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

.btn-secondary:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
    color: #fff;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #157347 100%);
    color: #fff;
}

.btn-success:hover {
    background: linear-gradient(135deg, #157347 0%, #12582f 100%);
    transform: translateY(-2px);
    color: #fff;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%);
    color: #fff;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #c82333 0%, #bd2130 100%);
    transform: translateY(-2px);
    color: #fff;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #0bacbe 100%);
    color: #fff;
}

.btn-info:hover {
    background: linear-gradient(135deg, #0bacbe 0%, #0a9ab3 100%);
    transform: translateY(-2px);
    color: #fff;
}

.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-success,
.btn-outline-danger,
.btn-outline-info,
.btn-outline-warning,
.btn-outline-dark,
.btn-outline-light {
    color: #fff !important;
    border-color: transparent !important;
    background-color: #6c757d !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.btn-outline-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0b5cdb 100%) !important;
}

.btn-outline-secondary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #5a6268 100%) !important;
}

.btn-outline-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #157347 100%) !important;
}

.btn-outline-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%) !important;
}

.btn-outline-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #0bacbe 100%) !important;
}

.btn-outline-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ffb700 100%) !important;
    color: #000 !important;
}

.btn-outline-dark {
    background: #212529 !important;
}

.btn-outline-light {
    background: #f8f9fa !important;
    color: #2c3e50 !important;
}

.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-success:hover,
.btn-outline-danger:hover,
.btn-outline-info:hover,
.btn-outline-warning:hover,
.btn-outline-dark:hover,
.btn-outline-light:hover {
    filter: brightness(0.95);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.45rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 0.35rem;
}

.btn-group {
    display: inline-flex;
    gap: 0.25rem;
    border-radius: 0.4rem;
    overflow: visible;
    align-items: center;
}

.btn-group-sm {
    gap: 0.25rem;
}

.btn-group .btn {
    margin: 0;
    font-size: 0.75rem;
    padding: 0.4rem 0.65rem;
    white-space: nowrap;
    min-width: 50px;
    flex-shrink: 0;
}

.btn-group form {
    display: contents;
}

.table .btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.75rem;
    min-height: 28px;
}

.table .btn-group {
    gap: 0.3rem;
    align-items: stretch;
}

.table .btn-group .btn {
    flex: 1;
    min-width: 45px;
    border-radius: 20px !important;
    padding: 0.35rem 0.5rem;
    font-size: 0.7rem;
}

button:active, button:focus {
    outline: none;
}

/* ==========================================
   Tables
   ========================================== */

.table-responsive {
    overflow-x: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    -webkit-border-radius: 0.75rem;
}

.table {
    background-color: #fff;
    border-collapse: collapse;
    margin-bottom: 0;
    border: 1px solid #dee2e6;
}

.table-responsive .table {
    border-radius: 0.75rem;
    overflow: hidden;
}

.table thead {
    background-color: #2c5282;
    border-bottom: 2px solid #1f3a5f;
}

.table thead th {
    color: #fff;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    padding: 1rem;
    border: none;
    vertical-align: middle;
    background-color: #2c5282;
}

.table thead th:first-child {
    border-top-left-radius: 0.75rem;
}

.table thead th:last-child {
    border-top-right-radius: 0.75rem;
}

.table thead th a {
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    white-space: nowrap;
}

.table thead th a:hover {
    color: #e0e7ff;
    text-decoration: underline;
}

.table tbody tr {
    border-bottom: 1px solid #dee2e6;
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: #f0f4ff;
    box-shadow: inset 0 0 10px rgba(13, 110, 253, 0.05);
}

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

.table tbody tr:last-child td:first-child {
    border-bottom-left-radius: 0.75rem;
}

.table tbody tr:last-child td:last-child {
    border-bottom-right-radius: 0.75rem;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    color: #2c3e50;
    border: 1px solid #dee2e6;
    border-right: 1px solid #dee2e6;
}

.table tbody td:first-child {
    border-left: 1px solid #dee2e6;
}

.table-bordered {
    border: 1px solid #dee2e6;
}

.table-bordered th,
.table-bordered td {
    border-color: #dee2e6;
}

.table-hover tbody tr:hover {
    background-color: #f0f4ff;
}

/* Striped rows */
.table tbody tr:nth-child(odd) {
    background-color: #f8f9fa;
}

.table tbody tr:nth-child(odd):hover {
    background-color: #f0f4ff;
}

.table tbody tr:nth-child(even) {
    background-color: #fff;
}

.table tbody tr:nth-child(even):hover {
    background-color: #f0f4ff;
}

/* Actions column styling */
.actions-column {
    padding: 0.75rem 0.5rem !important;
    text-align: center;
    white-space: nowrap;
    min-width: 150px;
    vertical-align: middle;
}

/* ==========================================
   Forms
   ========================================== */

.form-control, .form-select {
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition);
    background-color: #fff;
    color: #2c3e50;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: #1f3a5f;
    margin-bottom: 0.5rem;
}

.form-text {
    color: #6c757d;
    font-size: 0.85rem;
}

/* ==========================================
   Cards
   ========================================== */

.card {
    border: 1px solid #dee2e6;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background-color: #fff;
}

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

.card-header {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8ecf8 100%);
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: #1f3a5f;
    padding: 1.25rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: #f8f9fa;
    border-top: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

.card-title {
    color: #1f3a5f;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.invoice-card,
.expense-card {
    border: 1px solid #dee2e6;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background-color: #fff;
}

.invoice-card:hover,
.expense-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.invoice-card .card-body,
.expense-card .card-body {
    padding: 1.25rem;
}

.invoice-card .card-title,
.expense-card .card-title {
    color: #1f3a5f;
    font-weight: 700;
    font-size: 1rem;
}

.text-sm {
    font-size: 0.9rem;
}

/* ==========================================
   Badges
   ========================================== */

.badge {
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
}

.badge.bg-info-light {
    background-color: #d1e7f7 !important;
    color: #0c5aa3 !important;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #157347 100%) !important;
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ffb700 100%) !important;
    color: #000 !important;
}

/* ==========================================
   Pagination
   ========================================== */

.pagination {
    margin-top: 2rem;
    gap: 0.25rem;
}

.page-item {
    margin: 0 0.125rem;
}

.page-link {
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    color: var(--primary-color);
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    transition: var(--transition);
    background-color: #fff;
}

.page-link:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0b5cdb 100%);
    color: #fff;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0b5cdb 100%);
    border-color: var(--primary-color);
    color: #fff;
}

.page-item.disabled .page-link {
    color: #6c757d;
    background-color: #f8f9fa;
    border-color: #dee2e6;
    cursor: not-allowed;
}

/* ==========================================
   Alerts & Messages
   ========================================== */

.alert {
    border: none;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid;
}

.alert-success {
    background-color: #d1e7dd;
    border-left-color: var(--success-color);
    color: #0f5132;
}

.alert-danger {
    background-color: #f8d7da;
    border-left-color: var(--danger-color);
    color: #842029;
}

.alert-warning {
    background-color: #fff3cd;
    border-left-color: var(--warning-color);
    color: #664d03;
}

.alert-info {
    background-color: #cfe2ff;
    border-left-color: var(--info-color);
    color: #084298;
}

/* ==========================================
   Spacing Utilities
   ========================================== */

.mb-4 {
    margin-bottom: 1.5rem !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}

.mb-2 {
    margin-bottom: 0.5rem !important;
}

.mt-4 {
    margin-top: 1.5rem !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.me-1 {
    margin-right: 0.25rem !important;
}

/* ==========================================
   Display Utilities
   ========================================== */

.d-flex {
    display: flex;
}

.justify-content-between {
    justify-content: space-between;
}

.justify-content-center {
    justify-content: center;
}

.justify-content-end {
    justify-content: flex-end;
}

.align-items-center {
    align-items: center;
}

.align-items-start {
    align-items: flex-start;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 1rem;
}

.d-inline-block {
    display: inline-block;
}

.d-inline {
    display: inline;
}

.w-100 {
    width: 100%;
}

.flex-grow-1 {
    flex-grow: 1;
}

.flex-wrap {
    flex-wrap: wrap;
}

/* Responsive display */
.d-none {
    display: none;
}

@media (min-width: 768px) {
    .d-md-none {
        display: none;
    }
    
    .d-md-table-cell {
        display: table-cell;
    }
    
    .d-md-block {
        display: block;
    }
}

@media (max-width: 767.98px) {
    .d-none.d-md-block,
    .d-none.d-md-table-cell {
        display: none !important;
    }
}

@media (min-width: 992px) {
    .d-lg-table-cell {
        display: table-cell;
    }
    
    .d-lg-block {
        display: block;
    }
}

@media (max-width: 991.98px) {
    .d-none.d-lg-table-cell,
    .d-none.d-lg-block {
        display: none !important;
    }
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 767.98px) {
    body {
        padding-top: 60px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .table {
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 0.5rem 0.9rem;
        font-size: 0.85rem;
        white-space: normal;
    }
    
    .btn-sm {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .py-4 {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
    }
    
    .d-flex {
        flex-direction: column;
    }
    
    .justify-content-between {
        justify-content: flex-start;
    }
    
    .invoice-card,
    .expense-card {
        border: 1px solid #e0e0e0;
        border-radius: 0.75rem;
        background-color: #fff;
        margin-bottom: 1rem;
    }
    
    .invoice-card .badge,
    .expense-card .badge {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
    
    .invoice-card .btn,
    .expense-card .btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
        flex: 1;
    }
    
    .row.g-3 {
        gap: 0.75rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 1.25rem;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    .table {
        font-size: 0.85rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: 0.75rem 0.5rem;
    }
    
    .btn {
        padding: 0.4rem 0.7rem;
        font-size: 0.8rem;
    }
    
    .btn-sm {
        padding: 0.3rem 0.5rem;
        font-size: 0.7rem;
    }
    
    .pagination {
        gap: 0.1rem;
    }
    
    .page-link {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .invoice-card .card-body,
    .expense-card .card-body {
        padding: 1rem;
    }
    
    .invoice-card .h6,
    .expense-card .h6 {
        font-size: 0.9rem;
    }
    
    .d-flex {
        flex-direction: column;
    }
}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
    body {
        padding-top: 0;
    }
    
    .navbar {
        display: none;
    }
    
    .btn {
        display: none;
    }
    
    .pagination {
        display: none;
    }
}

/* ==========================================
   Accessibility
   ========================================== */

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

a:hover {
    color: #0b5cdb;
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ==========================================
   Utility Classes
   ========================================== */

.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

.rounded {
    border-radius: 0.5rem;
}

.rounded-lg {
    border-radius: 0.75rem;
}

.text-dark {
    color: var(--dark-color);
}

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

.bg-light {
    background-color: var(--light-color);
}

.bg-white {
    background-color: #fff;
}

.opacity-75 {
    opacity: 0.75;
}