/**
 * Personal Finance Tracker - Main Stylesheet
 * Modern CSS with Flexbox/Grid
 */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #06b6d4;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #475569;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-info: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-icon {
    padding: 8px;
    border-radius: 50%;
    background: var(--bg-card);
    color: var(--text-primary);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.alert ul {
    margin: 0;
    padding-left: 20px;
}

/* Auth Pages */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

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

.auth-icon {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}

.auth-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
}

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

.auth-form label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
}

.auth-form input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Dashboard Layout */
.dashboard-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 260px;
    right: 0;
    height: 70px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 10px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.3s ease;
}

.user-dropdown a:first-child {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.user-dropdown a:last-child {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.user-dropdown a:hover {
    background: var(--bg-primary);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--bg-card);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.mini-summary {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mini-item {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
}

.mini-item span:first-child {
    color: var(--text-secondary);
}

.positive {
    color: var(--success);
}

.negative {
    color: var(--danger);
}

/* Main Content */
.main-content {
    margin-left: 260px;
    margin-top: 70px;
    padding: 30px;
}

.content-header {
    margin-bottom: 30px;
}

.content-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-header p {
    color: var(--text-secondary);
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.card-balance .card-icon {
    background: var(--gradient-primary);
    color: white;
}

.card-income .card-icon {
    background: var(--gradient-success);
    color: white;
}

.card-expense .card-icon {
    background: var(--gradient-danger);
    color: white;
}

.card-forecast .card-icon {
    background: var(--gradient-info);
    color: white;
}

.card-content h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.card-content .amount {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.dashboard-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-header h2 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Transactions List */
.transactions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.transaction-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    transition: background 0.3s ease;
}

.transaction-item:hover {
    background: var(--bg-secondary);
}

.transaction-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.transaction-info {
    flex: 1;
}

.transaction-info h4 {
    font-size: 14px;
    margin-bottom: 4px;
}

.transaction-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.transaction-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.transaction-amount {
    font-weight: 700;
    font-size: 14px;
}

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

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

.btn-delete {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.transaction-item:hover .btn-delete {
    opacity: 1;
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.1);
    border-radius: 4px;
}

/* Progress Bar */
.progress-bar {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin: 8px 0;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.progress-percent {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Budget List */
.budget-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.budget-item {
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.budget-header {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    margin-bottom: 8px;
}

/* Goals List */
.goals-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.goal-item {
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.priority-high {
    color: var(--danger);
    font-size: 12px;
    font-weight: 600;
}

.priority-medium {
    color: var(--warning);
    font-size: 12px;
    font-weight: 600;
}

.priority-low {
    color: var(--info);
    font-size: 12px;
    font-weight: 600;
}

.goal-amounts {
    display: flex;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Debts List */
.debts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.debt-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.debt-rank {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.debt-info {
    flex: 1;
}

.debt-info h4 {
    font-size: 14px;
    margin-bottom: 4px;
}

.debt-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.debt-amount {
    font-weight: 700;
    color: var(--danger);
}

/* Investments List */
.investments-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.investment-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.investment-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-info);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.investment-info {
    flex: 1;
}

.investment-info h4 {
    font-size: 14px;
    margin-bottom: 4px;
}

.investment-type {
    font-size: 12px;
    color: var(--text-secondary);
}

.investment-value {
    text-align: right;
}

.investment-value > div:first-child {
    font-weight: 700;
    margin-bottom: 4px;
}

.investment-value .positive {
    color: var(--success);
    font-size: 12px;
}

.investment-value .negative {
    color: var(--danger);
    font-size: 12px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 28px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--danger);
}

.modal-content form {
    padding: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.toggle-group {
    display: flex;
    gap: 12px;
}

.toggle-group input[type="radio"] {
    display: none;
}

.toggle-group label {
    flex: 1;
    padding: 12px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0;
}

.toggle-group input[type="radio"]:checked + label {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

/* Flash Message Animation */
.flash-message {
    animation: slideDown 0.5s ease, fadeOut 0.5s ease 3.5s forwards;
}

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

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
    
    .main-header {
        left: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .username {
        display: none;
    }
}

/* GSAP Animation Classes */
.fade-in {
    opacity: 0;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
}