/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    margin: 0;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0;
    flex-wrap: wrap;
}

.nav-link {
    display: block;
    padding: 0.8rem 1.2rem;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 5px;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.mobile-menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.hamburger {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hamburger animation */
.mobile-menu-toggle.active .hamburger:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Main Content */
.main {
    padding: 2rem 0;
    min-height: calc(100vh - 120px);
}

#content-area {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid #dee2e6;
}

.page-title {
    font-size: 2rem;
    color: #2c3e50;
    margin: 0;
}

.page-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Search and Filter */
.search-container {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    min-width: 200px;
}

.search-input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-success {
    background-color: #27ae60;
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-warning {
    background-color: #f39c12;
    color: white;
}

.btn-warning:hover {
    background-color: #d68910;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-small {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    padding: 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #495057;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

.table .actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.spinner-overlay.show {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Dashboard Styles */
.dashboard-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    max-width: none;
}

.stat-card {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.stat-card-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat-card-value {
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
    margin: 0;
}

.stat-card-label {
    color: #6c757d;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.category-card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    border-color: #3498db;
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.category-icon {
    font-size: 2rem;
    margin-right: 1rem;
    padding: 0.5rem;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 10px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 0;
}

.category-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}

.category-stat {
    text-align: center;
    padding: 0.75rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.category-stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0;
    color: #2c3e50;
}

.category-stat-label {
    font-size: 0.8rem;
    color: #6c757d;
    margin-top: 0.25rem;
}

.profit-positive {
    color: #27ae60;
}

.profit-negative {
    color: #e74c3c;
}

.recent-activities {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
}

.recent-activities-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid #dee2e6;
}

.recent-activities-title {
    margin: 0;
    color: #2c3e50;
    font-size: 1.25rem;
}

.activities-list {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid #f1f3f4;
    transition: background-color 0.3s ease;
}

.activity-item:hover {
    background-color: #f8f9fa;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.2rem;
    color: white;
}

.activity-icon.expense {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.activity-icon.credit {
    background: linear-gradient(135deg, #27ae60, #229954);
}

.activity-details {
    flex: 1;
}

.activity-description {
    font-weight: 500;
    color: #2c3e50;
    margin: 0 0 0.25rem 0;
}

.activity-date {
    color: #6c757d;
    font-size: 0.85rem;
    margin: 0;
}

.activity-amount {
    font-weight: 600;
    font-size: 1.1rem;
}

.activity-amount.expense {
    color: #e74c3c;
}

.activity-amount.credit {
    color: #27ae60;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #6c757d;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: #495057;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .header-content {
        position: relative;
    }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        padding: 1rem 0;
    }

    .nav-link {
        padding: 1rem 2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 1rem;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .dashboard-overview {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

    .category-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .category-stats {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.5rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .page-actions {
        width: 100%;
        justify-content: space-between;
    }

    .search-container {
        width: 100%;
        flex-direction: column;
    }

    .search-input {
        width: 100%;
    }

    .table-container {
        margin: 0 -20px;
    }

    .table th,
    .table td {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    .table .actions {
        flex-direction: column;
        gap: 0.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo {
        font-size: 1.5rem;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
    }

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