/* CSS Variables - Maxton Dark Theme */
:root {
    --bg-primary: #1a1d29;
    --bg-secondary: #252936;
    --bg-tertiary: #2d3142;
    --bg-card: #252936;
    --bg-card-hover: #2d3142;

    --text-primary: #e4e6eb;
    --text-secondary: #b0b3b8;
    --text-muted: #8a8d91;

    --accent-primary: #5d87ff;
    --accent-hover: #4570ea;
    --accent-light: rgba(93, 135, 255, 0.1);

    --success: #13deb9;
    --success-bg: rgba(19, 222, 185, 0.1);

    --danger: #fc4b6c;
    --danger-bg: rgba(252, 75, 108, 0.1);

    --warning: #ffb64d;
    --warning-bg: rgba(255, 182, 77, 0.1);

    --info: #5d87ff;
    --info-bg: rgba(93, 135, 255, 0.1);

    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.12);
    --shadow: rgba(0, 0, 0, 0.15);
    --shadow-lg: rgba(0, 0, 0, 0.3);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

/* Header */
.app-header {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 2px 4px rgba(93, 135, 255, 0.2);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 8px rgba(93, 135, 255, 0.3);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

#addDocumentBtn:hover {
    background: #0fb89a !important;
    border-color: #0fb89a !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(19, 222, 185, 0.3);
}

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

.btn-danger:hover {
    background: #dc2626;
}

/* Main Content */
.main-content {
    display: grid;
    gap: 24px;
}

/* Dashboard */
.dashboard {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dashboard h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--success));
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.stat-value.income {
    color: #13deb9;
}

.stat-value.expense {
    color: #fc4b6c;
}

.stat-value.warning {
    color: #ffb64d;
}

.stat-value.danger {
    color: #fc4b6c;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.chart-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    height: 400px;
    display: flex;
    flex-direction: column;
}

.chart-card canvas {
    flex: 1;
    max-height: 300px;
}

.chart-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}

/* Upcoming Payments */
.upcoming-payments {
    margin-top: 24px;
}

.upcoming-payments h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}

.payment-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.payment-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.payment-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateX(2px);
}

.payment-item.overdue {
    border-left: 4px solid #fc4b6c;
    background: rgba(252, 75, 108, 0.08);
}

.payment-item.upcoming {
    border-left: 4px solid #ffb64d;
    background: rgba(255, 182, 77, 0.08);
}

.payment-item.paid {
    border-left: 4px solid #13deb9;
    background: rgba(19, 222, 185, 0.08);
    opacity: 0.8;
}

.payment-info {
    flex: 1;
}

.payment-description {
    font-weight: 500;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.payment-meta {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.payment-amount {
    font-size: 18px;
    font-weight: 700;
    margin-right: 16px;
}

.payment-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 12px;
    color: var(--text-secondary);
}

.icon-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

/* Transactions Section */
.transactions-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.3px;
}

.collapse-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border-radius: var(--radius-sm);
}

.collapse-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.collapse-icon {
    font-size: 14px;
    transition: transform 0.3s ease;
    display: inline-block;
}

.transactions-content {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Filters */
.filters {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-group select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-group select:hover,
.filter-group select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

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

.transaction-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.transaction-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateX(2px);
}

.transaction-item.income {
    border-left: 4px solid #13deb9;
}

.transaction-item.expense {
    border-left: 4px solid #fc4b6c;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px var(--shadow-lg);
    animation: modalSlideIn 0.3s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.close-btn:hover {
    color: var(--danger);
    transform: rotate(90deg);
}

/* Form */
form {
    padding: 32px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.form-group-row {
    display: flex;
    gap: 16px;
}

.flex-1 {
    flex: 1;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 32px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 16px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.personal {
    background: rgba(93, 135, 255, 0.15);
    color: #5d87ff;
}

.badge.business {
    background: rgba(19, 222, 185, 0.15);
    color: #13deb9;
}

/* Timeline Calendar */
.timeline-calendar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.timeline-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.timeline-controls {
    display: flex;
    gap: 8px;
}

.timeline-nav-btn {
    padding: 8px 16px;
    font-size: 12px;
    min-width: auto;
}

.timeline-container {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
    overflow-x: auto;
}

.timeline-day {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    min-width: 140px;
    transition: var(--transition);
}

.timeline-day:hover {
    border-color: var(--border-hover);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.timeline-day-today {
    border-color: var(--accent-primary);
    background: rgba(93, 135, 255, 0.05);
    box-shadow: 0 2px 8px rgba(93, 135, 255, 0.2);
}

.timeline-day-past {
    opacity: 0.7;
}

.timeline-day-header {
    text-align: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.timeline-day-name {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 4px;
}

.timeline-day-number {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.timeline-day-month {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.timeline-day-content {
    min-height: 100px;
}

.timeline-day-total {
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 8px;
    padding: 6px;
    border-radius: var(--radius-sm);
}

.timeline-day-total-income {
    color: var(--success);
    background: rgba(19, 222, 185, 0.15);
}

.timeline-day-total-expense {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.15);
}

.timeline-day-total-income {
    color: var(--success);
    background: rgba(19, 222, 185, 0.15);
}

.timeline-day-total-expense {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.15);
}

.timeline-day-payments {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.timeline-payment-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.timeline-payment-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.timeline-payment-amount {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-payment-name {
    font-size: 11px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.timeline-day-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    padding: 20px 0;
    font-style: italic;
}

/* Footer */
.app-footer {
    margin-top: 32px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-actions {
    display: flex;
    gap: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        padding: 12px;
    }

    .app-header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .filters {
        grid-template-columns: 1fr;
    }

    .payment-item,
    .transaction-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .payment-actions,
    .form-actions {
        width: 100%;
        justify-content: stretch;
    }

    .payment-actions button,
    .form-actions button {
        flex: 1;
    }
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h1 {
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.login-card input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    box-sizing: border-box;
}

.login-card input[type="password"]:focus {
    outline: none;
    border-color: var(--accent-primary);
}