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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Screen & View Management */
.screen {
    display: none !important;
}

.screen.active {
    display: block !important;
}

#loginScreen.active {
    display: flex !important;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* Login Screen */
#loginScreen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
}

.login-container {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 1rem;
}

.login-logo-img {
    width: 64px;
    height: 64px;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.login-container .form-group label {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.login-container .form-control {
    background-color: #fff;
}

.btn-login {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    margin-top: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.3);
}

.btn-login:active {
    transform: translateY(0);
}

.info-text {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--secondary-color);
}

/* Navigation */
.navbar {
    background: var(--card-bg);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.nav-link {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-color);
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Container & Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.card h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-color);
}

.form-group label input[type="checkbox"] {
    margin-right: 0.5rem;
    width: auto;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.9rem;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-control:hover {
    border-color: #cbd5e1;
    background-color: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #fff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1), inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-control::placeholder {
    color: #94a3b8;
}

.form-control[readonly] {
    background-color: var(--bg-color);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Select styling */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* Textarea styling */
textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

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

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: #1d4ed8;
}

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-success:hover {
    background: #059669;
}

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

/* Stopwatch */
.stopwatch-container {
    text-align: center;
}

.stopwatch-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 2rem 0;
    font-variant-numeric: tabular-nums;
}

.stopwatch-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.stopwatch-controls .form-control {
    max-width: 300px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background: var(--bg-color);
}

th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 0.75rem;
    vertical-align: middle;
}

tr {
    min-height: 48px;
    border-bottom: 1px solid var(--border-color);
}

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

.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    min-height: 32px;
}

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Report Summary */
.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.summary-item {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.summary-label {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.2s;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s;
}

.modal-content.modal-large {
    max-width: 900px;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.modal-close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--secondary-color);
    line-height: 1;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.modal-close:hover {
    color: var(--text-color);
    background: var(--bg-color);
}

.modal select[multiple] {
    padding: 0.5rem;
}

.modal select[multiple] option {
    padding: 0.5rem;
    margin: 0.25rem 0;
    border-radius: 4px;
}

.modal select[multiple] option:checked {
    background: var(--primary-color);
    color: white;
}

.modal small {
    display: block;
    margin-top: 0.5rem;
    color: var(--secondary-color);
    font-size: 0.75rem;
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
    }

    .nav-link {
        width: 100%;
        text-align: center;
    }

    .container {
        padding: 1rem;
    }

    .stopwatch-display {
        font-size: 3rem;
    }

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

    table {
        font-size: 0.75rem;
    }

    th, td {
        padding: 0.5rem;
    }
}

/* Hide admin elements for non-admin users */
body:not(.is-admin) .admin-only {
    display: none !important;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin: 4px 0;
}

.progress-fill {
    height: 100%;
    transition: width 0.3s ease;
}

.progress-success {
    background: #10b981;
}

.progress-warning {
    background: #f59e0b;
}

.progress-danger {
    background: #ef4444;
}

/* Links in tables */
table a {
    color: var(--primary-color);
    text-decoration: none;
}

table a:hover {
    text-decoration: underline;
}

table small {
    color: var(--secondary-color);
    font-size: 0.75rem;
}

/* Dashboard Styles */
.dashboard-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}

.summary-card .summary-label {
    font-size: 1rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.summary-card .summary-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-card {
    min-height: 400px;
}

.chart-card canvas {
    max-height: 350px;
}

/* Billing Status */
.billing-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.billing-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.invoice-input {
    width: 120px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.invoice-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.invoice-number {
    font-size: 0.75rem;
    color: var(--secondary-color);
    background: var(--bg-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Bulk Actions */
.bulk-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 8px;
}

/* Entry Selection */
.entry-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Responsive Charts */
@media (max-width: 900px) {
    .charts-container {
        grid-template-columns: 1fr;
    }

    .chart-card {
        min-height: 300px;
    }
}

/* Detail Views */
.detail-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #374151;
}

.detail-title {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detail-title h2 {
    margin: 0;
    font-size: 1.75rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.detail-info,
.detail-budget,
.detail-summary {
    height: fit-content;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-item.full-width {
    grid-column: span 2;
}

.info-item label {
    font-size: 0.75rem;
    color: #9ca3af;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item span {
    font-size: 1rem;
    color: #1f2937;
}

.info-item a {
    color: #60a5fa;
    text-decoration: none;
}

.info-item a:hover {
    text-decoration: underline;
}

/* Budget Summary */
.budget-summary {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.budget-progress-large .progress-bar {
    height: 1.5rem;
    border-radius: 0.5rem;
}

.budget-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.budget-breakdown {
    display: flex;
    gap: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #374151;
}

.breakdown-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.breakdown-label {
    font-size: 0.75rem;
    color: #9ca3af;
}

.breakdown-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: #10b981;
}

.breakdown-value.deduction {
    color: #f59e0b;
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: center;
}

.summary-item .summary-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #10b981;
}

.summary-item .summary-label {
    font-size: 0.75rem;
    color: #9ca3af;
    text-transform: uppercase;
    margin-top: 0.25rem;
}

/* Add deduction form */
.add-deduction-form {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #374151;
}

.add-deduction-form h4 {
    margin: 0 0 1rem 0;
    font-size: 0.875rem;
    color: #9ca3af;
}

/* Clickable table rows */
#projectsTable tbody tr,
#clientsTable tbody tr,
#clientDetailProjectsTable tbody tr {
    cursor: pointer;
    transition: background-color 0.15s ease;
}

#projectsTable tbody tr:hover,
#clientsTable tbody tr:hover,
#clientDetailProjectsTable tbody tr:hover {
    background-color: #e1f5f2;
}

/* Responsive detail views */
@media (max-width: 768px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .detail-header {
        flex-wrap: wrap;
    }

    .detail-title {
        order: -1;
        width: 100%;
        margin-bottom: 0.5rem;
    }

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

    .info-item.full-width {
        grid-column: span 1;
    }

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

    .budget-breakdown {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #374151;
}

#entriesPageInfo {
    color: #9ca3af;
    font-size: 0.875rem;
}

/* Entries Filter */
.entries-filter {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #374151;
}