:root {
    --primary-color: #4a6bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white: #ffffff;
    --black: #000000;
    --gray: #6c757d;
    --light-gray: #f1f1f1;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid #e1e1e1;
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 10px;
}

.logo p {
    font-size: 14px;
    color: var(--secondary-color);
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.main-nav ul li a i {
    margin-right: 8px;
    font-size: 16px;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

.mobile-nav {
    display: none;
    background-color: var(--white);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
}

.mobile-nav ul {
    list-style: none;
}

.mobile-nav ul li {
    margin-bottom: 15px;
}

.mobile-nav ul li:last-child {
    margin-bottom: 0;
}

.mobile-nav ul li a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.mobile-nav ul li a i {
    margin-right: 10px;
    font-size: 18px;
}

.mobile-nav ul li a:hover {
    color: var(--primary-color);
}

.main-content {
    padding-bottom: 50px;
}

.page-title {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 10px;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(74, 107, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    color: var(--primary-color);
    font-size: 24px;
}

.stat-info h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.stat-amount {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-color);
}

.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.recent-activity {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.recent-expenses,
.recent-payments {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.recent-expenses h2,
.recent-payments h2 {
    font-size: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.recent-expenses h2 i,
.recent-payments h2 i {
    margin-right: 10px;
    color: var(--primary-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e1e1e1;
}

table th {
    font-weight: 600;
    color: var(--dark-color);
    background-color: #f8f9fa;
}

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

.screenshot-link {
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.screenshot-link i {
    margin-right: 5px;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f5f7fa;
    padding: 20px;
}

.login-box {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 40px;
    width: 100%;
    max-width: 500px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--secondary-color);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e1e1e1;
    border-radius: var(--border-radius);
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.2);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn:hover {
    background-color: #3a5bef;
    transform: translateY(-2px);
}

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

.btn-block {
    display: block;
    width: 100%;
}

.alert {
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.alert-error {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.expense-form-container,
.payment-form-container {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.expense-form-container h2,
.payment-form-container h2 {
    font-size: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.expense-form-container h2 i,
.payment-form-container h2 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.expenses-list,
.payments-list {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.expenses-list h2,
.payments-list h2 {
    font-size: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.expenses-list h2 i,
.payments-list h2 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.app-footer {
    text-align: center;
    padding: 20px 0;
    color: var(--secondary-color);
    font-size: 14px;
    border-top: 1px solid #e1e1e1;
    margin-top: 30px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    from, 20%, 40%, 60%, 80%, to {
        animation-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1.000);
    }
    0% {
        opacity: 0;
        transform: scale3d(0.3, 0.3, 0.3);
    }
    20% {
        transform: scale3d(1.1, 1.1, 1.1);
    }
    40% {
        transform: scale3d(0.9, 0.9, 0.9);
    }
    60% {
        opacity: 1;
        transform: scale3d(1.03, 1.03, 1.03);
    }
    80% {
        transform: scale3d(0.97, 0.97, 0.97);
    }
    to {
        opacity: 1;
        transform: scale3d(1, 1, 1);
    }
}

.animated {
    animation-duration: 1s;
    animation-fill-mode: both;
}

.fadeIn {
    animation-name: fadeIn;
}

.fadeInUp {
    animation-name: fadeInUp;
}

.bounceIn {
    animation-name: bounceIn;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

/* Responsive styles */
@media (max-width: 992px) {
    .recent-activity {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav ul {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-nav.active {
        display: block;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .login-box {
        padding: 20px;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}