:root {
    --primary: #1A73E8;
    --primary-hover: #1557b0;
    --success: #1E8E3E;
    --warning: #F9AB00;
    --danger: #D93025;
    
    --bg-color: #F1F3F4;
    --surface: #FFFFFF;
    
    --text-main: #202124;
    --text-muted: #5F6368;
    
    --border: #DADCE0;
    
    --shadow-sm: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-modal: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius: 8px;
    --radius-lg: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    overflow: hidden; /* App-like feel */
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    color: var(--primary);
}

.logo h2 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0 12px;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0 24px 24px 0;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: rgba(26, 115, 232, 0.04);
    color: var(--text-main);
}

.nav-item.active {
    background-color: rgba(26, 115, 232, 0.12);
    color: var(--primary);
}

.user-profile {
    padding: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.2rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info .name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-info .role {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-header {
    height: 72px;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
}

.top-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

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

.content-wrapper {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

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

/* Cards & Dashboard */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.card {
    background-color: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.summary-card {
    display: flex;
    align-items: center;
    padding: 24px;
    gap: 24px;
}

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

.card-icon span {
    font-size: 32px;
}

.primary .card-icon { background-color: rgba(26, 115, 232, 0.1); color: var(--primary); }
.success .card-icon { background-color: rgba(30, 142, 62, 0.1); color: var(--success); }
.warning .card-icon { background-color: rgba(249, 171, 0, 0.1); color: var(--warning); }

.card-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.card-info .amount {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

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

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

/* Lists */
.activity-list, .category-list {
    list-style: none;
}

.activity-list li, .category-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.activity-list li:last-child, .category-list li:last-child {
    border-bottom: none;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 24px 0 !important;
    justify-content: center !important;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    padding: 0;
}

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

.data-table th, .data-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tr:hover {
    background-color: rgba(0,0,0,0.01);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 1px 3px 0 rgba(60,64,67,0.3);
}

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

.btn-secondary:hover {
    background-color: rgba(26,115,232,0.04);
}

.btn-text {
    background-color: transparent;
    color: var(--text-muted);
}

.btn-text:hover {
    background-color: rgba(95,99,104,0.04);
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: transparent;
    color: var(--text-muted);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.btn-icon:hover {
    background-color: rgba(95,99,104,0.08);
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pending { background-color: rgba(249, 171, 0, 0.15); color: #B07B00; }
.badge-approved { background-color: rgba(30, 142, 62, 0.15); color: var(--success); }
.badge-rejected { background-color: rgba(217, 48, 37, 0.15); color: var(--danger); }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(32, 33, 36, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background-color: var(--surface);
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-modal);
    transform: translateY(20px);
    transition: transform 0.2s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-body {
    padding: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    color: var(--text-main);
    transition: border-color 0.2s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

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

/* Login Screen */
.login-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.login-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.login-box {
    width: 100%;
    max-width: 400px;
    padding: 32px;
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-modal);
}

/* Report Builder */
.report-builder-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 24px;
    height: calc(100vh - 160px);
}

.report-widgets-panel, .report-canvas-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.widget-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 100px;
}

.widget-item {
    background: white;
    border: 1px solid var(--border);
    padding: 12px 16px;
    border-radius: 6px;
    cursor: grab;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    transition: box-shadow 0.2s, transform 0.2s;
}

.widget-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.widget-item:active {
    cursor: grabbing;
}

.canvas-area {
    flex: 1;
    background: #fafafa;
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 24px;
    min-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.canvas-area.drag-over {
    background: rgba(26, 115, 232, 0.05);
    border-color: var(--primary);
}

.canvas-widget {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.canvas-widget .remove-widget {
    position: absolute;
    top: 10px;
    right: 10px;
    color: var(--danger);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.5;
}

.canvas-widget .remove-widget:hover {
    opacity: 1;
}

.canvas-widget canvas {
    max-width: 100%;
    height: auto !important;
    max-height: 250px;
}

/* Approval Path Builder */
.path-builder-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.path-node {
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    cursor: grab;
}

.path-node:active {
    cursor: grabbing;
}

.path-node > div {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.node-limit {
    width: 140px;
    padding: 6px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}