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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-bg: #1a1a2e;
    --card-bg: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border-color: #2d3748;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    text-align: center;
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.header-content h1 i {
    margin-right: 15px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    min-width: 120px;
    padding: 15px 25px;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-btn i {
    margin-right: 8px;
}

.tab-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--text-primary);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

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

.stat-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}

.stat-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
}

.section-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

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

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
    min-height: 36px;
}

/* Table */
.table-container {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

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

.data-table thead {
    background: rgba(102, 126, 234, 0.1);
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr {
    transition: background 0.2s ease;
}

.data-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.empty-state {
    text-align: center;
    padding: 60px 20px !important;
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    display: block;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Action Buttons */
.action-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Payment Status */
.payment-status {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.payment-status .paid {
    color: var(--success-color);
    font-weight: 600;
}

.payment-status .pending {
    color: var(--danger-color);
    font-weight: 600;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-installation {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.badge-service {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.badge-addon {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.badge-rewiring {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    overflow-y: auto;
    padding: 20px;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-small {
    max-width: 400px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.modal form {
    padding: 25px;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

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

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

.form-input,
.form-select {
    width: 100%;
    padding: 12px 15px;
    background: var(--dark-bg);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    min-height: 44px;
}

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

.form-input[readonly] {
    background: rgba(102, 126, 234, 0.1);
    cursor: not-allowed;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

/* Payment Summary */
.payment-summary {
    padding: 20px 25px;
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--primary-color);
    margin: 0 25px 20px;
    border-radius: 10px;
}

.payment-summary p {
    margin-bottom: 10px;
    font-size: 1rem;
}

.payment-summary p:last-child {
    margin-bottom: 0;
}

/* Payments List */
.payments-list {
    padding: 0 25px 25px;
    max-height: 300px;
    overflow-y: auto;
}

.payment-item {
    background: var(--dark-bg);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 3px solid var(--success-color);
}

.payment-item-info {
    flex: 1;
}

.payment-item-info p {
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.payment-item-info .amount {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--success-color);
}

/* Expense Summary Bar */
.expense-summary-bar {
    display: flex;
    gap: 20px;
    align-items: stretch;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.expense-summary-box {
    flex: 1;
    min-width: 260px;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.expense-summary-box--danger {
    background: rgba(248, 113, 113, 0.1);
    border-left: 4px solid var(--danger-color);
}

.expense-summary-box--success {
    background: rgba(52, 211, 153, 0.1);
    border-left: 4px solid var(--success-color);
}

.expense-summary-box__left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.expense-summary-box__title {
    margin: 0;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
}

.expense-summary-box__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.expense-summary-box__amount {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

.expense-summary-box__amount--danger {
    color: var(--danger-color);
}

.expense-summary-box__amount--success {
    color: var(--success-color);
}

/* Expense Types */
.expense-types-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.expense-types-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0;
}

.expense-type-tag {
    background: rgba(102, 126, 234, 0.2);
    padding: 8px 15px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.expense-type-tag button {
    background: transparent;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.expense-type-tag button:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* Report Filters */
.report-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.report-filters .form-select {
    width: auto;
    min-width: 150px;
}

/* Report Summary */
.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.report-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
}

.report-card h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.report-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Report Breakdown */
.report-breakdown {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.report-breakdown h3 {
    margin-bottom: 20px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--dark-bg);
    border-radius: 10px;
    margin-bottom: 10px;
}

.breakdown-item-info h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.breakdown-item-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.breakdown-item-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Utility Classes */
.text-success {
    color: var(--success-color);
}

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

.text-warning {
    color: var(--warning-color);
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header-content h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .current-month {
        font-size: 0.85rem;
    }

    .nav-tabs {
        padding: 10px;
        gap: 8px;
    }

    .tab-btn {
        padding: 12px 15px;
        font-size: 0.9rem;
        min-width: 100px;
    }

    .tab-btn i {
        display: block;
        margin-right: 0;
        margin-bottom: 5px;
    }

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

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .table-container {
        border-radius: 10px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .data-table {
        font-size: 0.85rem;
        min-width: 600px;
    }

    .data-table th,
    .data-table td {
        padding: 10px 8px;
        white-space: nowrap;
    }

    .modal-content {
        margin: 10px;
        max-height: 95vh;
        width: calc(100% - 20px);
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .report-filters {
        flex-direction: column;
        width: 100%;
    }

    .report-filters .form-select,
    .report-filters .btn {
        width: 100%;
    }

    .report-summary {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .report-card {
        padding: 20px;
    }

    .report-value {
        font-size: 1.5rem;
    }

    .action-btns {
        flex-direction: column;
        gap: 5px;
    }

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

    /* Better touch targets */
    .btn {
        min-height: 44px;
        padding: 12px 20px;
    }

    .btn-sm {
        min-height: 40px;
        padding: 10px 16px;
    }

    /* Form improvements */
    .form-input,
    .form-select {
        font-size: 16px;
        /* Prevents zoom on iOS */
        min-height: 44px;
    }

    .form-checkbox {
        width: 24px;
        height: 24px;
    }

    /* Modal improvements */
    .modal-header {
        padding: 20px;
    }

    .modal form {
        padding: 20px;
    }

    /* Expense type tags */
    .expense-types-list {
        gap: 8px;
    }

    .expense-type-tag {
        font-size: 0.85rem;
        padding: 6px 12px;
    }

    /* Expense summary bar - stack vertically on mobile */
    .expense-summary-bar {
        flex-direction: column;
        gap: 12px;
    }

    .expense-summary-box {
        min-width: 0;
        width: 100%;
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .expense-summary-box__amount {
        font-size: 1.3rem;
        align-self: center;
    }

    .expense-summary-box__title {
        font-size: 0.95rem;
        white-space: normal;
    }

    .expense-summary-box__actions .btn {
        font-size: 0.82rem;
        padding: 8px 12px;
        min-height: 38px;
    }
}

/* Tablet specific (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .report-summary {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .header,
    .nav-tabs,
    .btn,
    .action-btns {
        display: none;
    }

    .tab-content {
        display: block !important;
    }

    .modal {
        display: none !important;
    }
}

/* Form Hint */
.form-hint {
    display: block;
    margin-top: 5px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Current Month Display */
.current-month {
    font-size: 1rem;
    opacity: 0.95;
    font-weight: 400;
    margin-top: 5px;
}

/* Checkbox Styles */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.form-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label span {
    font-weight: 500;
}

/* Temporary Entry Styles */
.badge-warning {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
    font-weight: 600;
    margin-left: 8px;
}

.temporary-row {
    background-color: rgba(251, 191, 36, 0.08) !important;
    border-left: 3px solid #fbbf24 !important;
}

.temporary-row:hover {
    background-color: rgba(251, 191, 36, 0.12) !important;
}