/* Theme Variables */
:root {
    /* Light Theme (Default) */
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #4fc3f7;
    --success-color: #4caf50;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --bg-color: #f5f7fa;
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-color: #343a40;
    --border-color: rgba(224, 224, 224, 0.8);
    --hover-bg: rgba(248, 249, 250, 0.9);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --box-shadow: 0 4px 6px var(--shadow-color);
    --transition: all 0.3s ease;
    --gradient-1: #4a6fa5;
    --gradient-2: #166088;
    --gradient-3: #4fc3f7;
}

/* Dark Theme */
[data-theme="dark"] {
    --primary-color: #64b5f6;
    --secondary-color: #2196f3;
    --accent-color: #29b6f6;
    --success-color: #66bb6a;
    --danger-color: #ef5350;
    --warning-color: #ffa726;
    --light-color: #424242;
    --dark-color: #e0e0e0;
    --gray-color: #9e9e9e;
    --bg-color: #121212;
    --card-bg: rgba(30, 30, 30, 0.9);
    --text-color: #e0e0e0;
    --border-color: rgba(51, 51, 51, 0.8);
    --hover-bg: rgba(45, 45, 45, 0.9);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --gradient-1: #1a237e;
    --gradient-2: #0d47a1;
    --gradient-3: #01579b;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    min-height: 100vh;
    transition: var(--transition);
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Glass Effect for Cards */
.card, .chart-card, .prediction-section, .transaction-form, .transactions-list {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow);
}

/* Header Styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

header h1 {
    color: var(--primary-color);
    font-size: 28px;
    display: flex;
    align-items: center;
    gap: 10px;
}

header h1 i {
    color: var(--secondary-color);
    font-size: 32px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

#current-date {
    font-weight: 500;
    color: var(--gray-color);
    background-color: var(--light-color);
    padding: 8px 12px;
    border-radius: var(--border-radius);
}

.currency-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.currency-selector select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    background-color: white;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.currency-selector select:hover {
    border-color: var(--primary-color);
}

/* Dashboard Styles */
.dashboard {
    margin-bottom: 40px;
}

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

.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    color: var(--text-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.card h3 {
    color: var(--gray-color);
    font-size: 16px;
    margin-bottom: 10px;
}

.card p {
    font-size: 24px;
    font-weight: 600;
}

.income p {
    color: var(--success-color);
}

.expenses p {
    color: var(--danger-color);
}

.balance p {
    color: var(--primary-color);
}

/* Charts Styles */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    height: 400px;
}

.chart-card h3 {
    color: var(--gray-color);
    font-size: 18px;
    margin-bottom: 15px;
    text-align: center;
}

/* Prediction Section Styles */
.prediction-section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.prediction-section h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 15px;
}

.prediction-card {
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.prediction-card p {
    margin-bottom: 10px;
}

.prediction-card p:nth-child(2) {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
}

.budget-recommendations h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.budget-recommendations ul {
    list-style-type: none;
}

.budget-recommendations li {
    padding: 12px;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 10px;
}

.budget-recommendations li:last-child {
    border-bottom: none;
}

.budget-recommendations li i {
    color: var(--primary-color);
}

/* Transaction Section Styles */
.transaction-section {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.transaction-form, .transactions-list {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.transaction-form h2, .transactions-list h2 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--gray-color);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    background-color: var(--card-bg);
    color: var(--text-color);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 111, 165, 0.2);
}

.btn-submit {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 12px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-submit:hover {
    background-color: var(--secondary-color);
}

/* Transactions List Styles */
.transactions-filter {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.transactions-filter input, .transactions-filter select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    background-color: var(--card-bg);
    color: var(--text-color);
}

.transactions-filter input:focus, .transactions-filter select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 111, 165, 0.2);
}

.transactions-filter input {
    flex: 1;
}

.transactions-table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-color);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--hover-bg);
    font-weight: 600;
    color: var(--text-color);
}

tbody tr:hover {
    background-color: var(--hover-bg);
}

.income-amount {
    color: var(--success-color);
    font-weight: 500;
}

.expense-amount {
    color: var(--danger-color);
    font-weight: 500;
}

.exceeds-limit {
    background-color: rgba(244, 67, 54, 0.1);
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-color);
    margin-right: 5px;
    transition: var(--transition);
    padding: 5px;
}

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

.delete-btn:hover {
    color: var(--danger-color);
}

/* Footer Styles */
footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    color: var(--gray-color);
    border-top: 1px solid #e0e0e0;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .transaction-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .user-info {
        width: 100%;
        justify-content: space-between;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .chart-card {
        height: 300px;
    }
}

@media (max-width: 576px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .transactions-filter {
        flex-direction: column;
    }
    
    .user-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .currency-selector {
        width: 100%;
    }
    
    .currency-selector select {
        width: 100%;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--hover-bg);
}

.theme-toggle i {
    font-size: 24px;
}