/* Enhanced Expense Tracker Styles */
:root {
    --primary-color: #667eea;
    --primary-dark: #764ba2;
    --secondary-color: #f093fb;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    --info-color: #2196f3;
    --income-color: #4caf50;
    --expense-color: #f44336;
    --background-color: #f5f7fa;
    --card-background: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--background-color) 0%, #e3f2fd 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Message Container */
.message-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
}

.message {
    padding: 12px 16px;
    margin-bottom: 10px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    animation: slideIn 0.3s ease;
}

.message:hover {
    transform: translateX(-5px);
}

.message.success {
    background: var(--success-color);
    color: white;
}

.message.error {
    background: var(--error-color);
    color: white;
}

.message.warning {
    background: var(--warning-color);
    color: white;
}

.message.info {
    background: var(--info-color);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Login Section */
.login-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    background: var(--card-background);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.login-header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.login-form {
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.login-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: #f8f9ff;
    border-radius: var(--border-radius);
}

.feature-icon {
    font-size: 1.5em;
}

/* App Section */
.app-section {
    min-height: 100vh;
    padding-bottom: 40px;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 20px 0;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content h1 {
    font-size: 2em;
    font-weight: 300;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logout-btn {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Navigation */
.app-nav {
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

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

.view-selector {
    display: flex;
    gap: 10px;
}

.view-btn {
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.view-btn.active,
.view-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Transaction Type Selector */
.transaction-type-section {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

.transaction-type-selector {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.type-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 16px;
}

.type-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.type-btn:hover:not(.active) {
    border-color: var(--primary-color);
    background: #f8f9ff;
}

/* Add Transaction Form */
.add-transaction-section {
    max-width: 1200px;
    margin: 0 auto 30px;
    padding: 0 20px;
}

.add-transaction-form {
    background: var(--card-background);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

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

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.add-btn,
.voice-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.add-btn {
    background: linear-gradient(135deg, var(--success-color), #45a049);
    color: white;
}

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

.voice-btn {
    background: linear-gradient(135deg, var(--info-color), #1976d2);
    color: white;
}

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

.voice-btn.listening {
    background: linear-gradient(135deg, var(--error-color), #d32f2f);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.voice-feedback {
    margin-top: 15px;
    padding: 10px;
    background: #f8f9ff;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--info-color);
    font-style: italic;
    min-height: 20px;
}

/* View Sections */
.view-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.view-header h2 {
    font-size: 1.8em;
    color: var(--text-primary);
}

.date-navigation,
.month-navigation {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-btn {
    padding: 8px 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--primary-dark);
}

.date-input,
.month-input {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
}

.export-btn {
    padding: 8px 16px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Summary Section */
.summary-section {
    background: var(--card-background);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 25px;
}

.balance-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.balance-item {
    text-align: center;
    padding: 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.balance-item.income {
    background: linear-gradient(135deg, #e8f5e8, #c8e6c9);
    border-left: 5px solid var(--income-color);
}

.balance-item.expense {
    background: linear-gradient(135deg, #ffebee, #ffcdd2);
    border-left: 5px solid var(--expense-color);
}

.balance-item.net.positive {
    background: linear-gradient(135deg, #e8f5e8, #c8e6c9);
    border-left: 5px solid var(--income-color);
}

.balance-item.net.negative {
    background: linear-gradient(135deg, #ffebee, #ffcdd2);
    border-left: 5px solid var(--expense-color);
}

.balance-label {
    font-size: 0.9em;
    color: var(--text-secondary);
    margin-bottom: 5px;
    font-weight: 600;
}

.balance-amount {
    font-size: 1.8em;
    font-weight: bold;
    color: var(--text-primary);
}

/* Transactions Container */
.transactions-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.transaction-item {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.transaction-item:hover {
    background: #f8f9ff;
}

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

.transaction-info {
    flex: 1;
}

.transaction-description {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.transaction-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85em;
    color: var(--text-secondary);
}

.transaction-category {
    background: #e3f2fd;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
}

.transaction-type {
    text-transform: capitalize;
    font-weight: 500;
}

.transaction-amount {
    font-size: 1.2em;
    font-weight: bold;
    margin-right: 15px;
}

.transaction-amount.income {
    color: var(--income-color);
}

.transaction-amount.expense {
    color: var(--expense-color);
}

.delete-btn {
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: var(--transition);
    opacity: 0.6;
}

.delete-btn:hover {
    background: #ffebee;
    opacity: 1;
    transform: scale(1.1);
}

.no-transactions {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Monthly View Specific */
.monthly-summary-header {
    margin-bottom: 20px;
}

.monthly-summary-header h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.summary-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    gap: 5px;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.daily-group {
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.daily-header {
    background: #f8f9ff;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.daily-header h4 {
    margin: 0;
    color: var(--text-primary);
}

.daily-totals {
    display: flex;
    gap: 15px;
    font-weight: 600;
}

.daily-totals .income {
    color: var(--income-color);
}

.daily-totals .expense {
    color: var(--expense-color);
}

.daily-totals .net.positive {
    color: var(--income-color);
}

.daily-totals .net.negative {
    color: var(--expense-color);
}

.daily-transactions {
    background: white;
}

/* Balance Sheet Specific */
.balance-sheet-content {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.balance-sheet-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 25px;
    text-align: center;
}

.balance-sheet-header h2 {
    margin-bottom: 10px;
    font-weight: 300;
}

.period-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    opacity: 0.9;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    padding: 25px;
}

.summary-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 5px solid var(--primary-color);
}

.summary-card h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.2em;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding: 5px 0;
}

.summary-row.total {
    border-top: 2px solid var(--border-color);
    margin-top: 10px;
    padding-top: 10px;
    font-weight: bold;
}

.summary-row .positive {
    color: var(--income-color);
}

.summary-row .negative {
    color: var(--expense-color);
}

.category-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
    padding: 0 25px 25px;
}

.category-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.category-item.income {
    background: linear-gradient(135deg, #e8f5e8, #f1f8e9);
    border-left: 4px solid var(--income-color);
}

.category-item.expense {
    background: linear-gradient(135deg, #ffebee, #fce4ec);
    border-left: 4px solid var(--expense-color);
}

.category-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.category-name {
    font-weight: 600;
    color: var(--text-primary);
}

.category-amount {
    font-weight: bold;
    font-size: 1.1em;
}

.category-count {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.no-data {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-style: italic;
}

.monthly-breakdown {
    padding: 25px;
    border-top: 1px solid var(--border-color);
}

.monthly-breakdown h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    text-align: center;
}

.breakdown-chart {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding: 10px 0;
}

.month-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
    text-align: center;
}

.month-label {
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-bottom: 5px;
    transform: rotate(-45deg);
    white-space: nowrap;
}

.month-bars {
    display: flex;
    gap: 2px;
    align-items: end;
    height: 100px;
    margin-bottom: 5px;
}

.bar {
    width: 15px;
    border-radius: 2px 2px 0 0;
    transition: var(--transition);
}

.bar.income {
    background: var(--income-color);
}

.bar.expense {
    background: var(--expense-color);
}

.bar:hover {
    opacity: 0.8;
    transform: scaleY(1.1);
}

.month-net {
    font-size: 0.8em;
    font-weight: 600;
}

.month-net.positive {
    color: var(--income-color);
}

.month-net.negative {
    color: var(--expense-color);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top: 5px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    color: white;
    margin-top: 20px;
    font-size: 1.2em;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .view-selector {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .view-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .balance-summary {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .category-breakdown {
        grid-template-columns: 1fr;
    }
    
    .transaction-item {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    
    .transaction-meta {
        flex-wrap: wrap;
    }
    
    .daily-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .breakdown-chart {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 20px;
        margin: 10px;
    }
    
    .app-section {
        padding-bottom: 20px;
    }
    
    .view-section {
        padding: 0 10px;
    }
    
    .add-transaction-form {
        padding: 15px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .transaction-type-selector {
        flex-direction: column;
        align-items: center;
    }
}

/* Print Styles */
@media print {
    .app-header,
    .app-nav,
    .add-transaction-section,
    .view-header .nav-btn,
    .export-btn,
    .delete-btn,
    .message-container {
        display: none !important;
    }
    
    .view-section {
        max-width: none;
        padding: 0;
    }
    
    .summary-section,
    .transactions-container,
    .balance-sheet-content {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}