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

:root {
    --primary: #6366f1;
    --secondary: #8b5cf6;
    --bg: #0a0a0f;
    --surface: #12121a;
    --surface-2: #1a1a25;
    --surface-3: #222233;
    --border: #2a2a3a;
    --text: #e4e4e7;
    --text-muted: #71717a;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --radius: 12px;
    --radius-sm: 8px;
    --sidebar-width: 260px;
    --topbar-height: 64px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-size: 14px; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
}

.logo .material-icons-round {
    font-size: 28px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 4px;
}

.nav-menu {
    list-style: none;
    padding: 12px;
    flex: 1;
    overflow-y: auto;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-weight: 500;
    transition: all var(--transition);
    font-size: 13px;
}

.nav-item a:hover {
    background: var(--surface-2);
    color: var(--text);
}

.nav-item.active a {
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(139,92,246,0.1));
    color: var(--primary);
}

.nav-item .material-icons-round { font-size: 20px; }

.nav-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 14px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin var(--transition);
}

.topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 50;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    padding: 8px;
    border-radius: var(--radius-sm);
}

.menu-toggle:hover { background: var(--surface-2); }

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.current-date { color: var(--text-muted); font-size: 13px; }

.content-wrapper { padding: 24px; max-width: 1400px; margin: 0 auto; }

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title { font-size: 24px; font-weight: 700; }
.page-subtitle { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

/* Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card-value { font-size: 24px; font-weight: 700; }
.stat-card-label { color: var(--text-muted); font-size: 12px; margin-top: 4px; }

/* Data Card / Panel */
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}

.panel-title { font-size: 16px; font-weight: 600; }
.panel-body { padding: 20px; }

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

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

th {
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: var(--surface-2);
}

td { font-size: 13px; }

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(99,102,241,0.03); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    border: none;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn .material-icons-round { font-size: 18px; }

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

.btn-primary:hover {
    box-shadow: 0 4px 15px rgba(99,102,241,0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--surface-3); }

.btn-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }

.btn-sm { padding: 6px 10px; font-size: 12px; }
.btn-sm .material-icons-round { font-size: 16px; }

/* Forms */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 13px;
    transition: all var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.form-control::placeholder { color: var(--text-muted); }

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 24 24'%3E%3Cpath fill='%2371717a' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-inline .form-control { width: auto; min-width: 150px; }

/* Tags / Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-card {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    color: white;
}

/* Color dot */
.color-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--surface);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(99,102,241,0.05);
}

.upload-zone .material-icons-round {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 12px;
}

.upload-zone p {
    color: var(--text-muted);
    font-size: 14px;
}

.upload-zone .upload-hint {
    font-size: 12px;
    margin-top: 8px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
}

.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 201;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal.active { opacity: 1; visibility: visible; transform: translate(-50%, -50%) scale(1); }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 16px; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 4px;
    border-radius: 6px;
}

.modal-close:hover { background: var(--surface-2); color: var(--text); }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideInRight 0.3s ease;
    min-width: 280px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-info { border-left: 3px solid var(--info); }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Charts */
.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

/* Transaction row editable */
.editable-cell {
    min-width: 140px;
}

.editable-cell .form-control {
    padding: 6px 10px;
    font-size: 12px;
    background: var(--surface-3);
}

/* Filter bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
}

.filter-bar .form-control {
    width: auto;
    min-width: 160px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .material-icons-round {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state p { font-size: 14px; margin-bottom: 20px; }

/* Item Cards (for cards/categories/people management) */
.item-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.item-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.item-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.item-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.item-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.item-card-name { font-weight: 600; font-size: 16px; }

.item-card-actions {
    display: flex;
    gap: 4px;
}

.item-card-meta {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.item-card-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.item-card-meta .material-icons-round { font-size: 16px; }

/* Color picker custom */
input[type="color"] {
    width: 40px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    cursor: pointer;
    padding: 2px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border); }

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-close { display: block; }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .content-wrapper { padding: 16px; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
    .charts-grid { grid-template-columns: 1fr; }
    .chart-container { height: 250px; }
    .filter-bar { flex-direction: column; }
    .filter-bar .form-control { width: 100%; min-width: unset; }
    .item-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .modal { width: 95%; max-height: 90vh; }
    th, td { padding: 10px 12px; }
    .stat-card { padding: 16px; }
    .stat-card-value { font-size: 20px; }

    .topbar { padding: 0 16px; }
}

@media (max-width: 480px) {
    .page-title { font-size: 20px; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .btn { padding: 8px 12px; font-size: 12px; }
}

/* Print */
@media print {
    .sidebar, .topbar, .btn, .menu-toggle { display: none !important; }
    .main-content { margin-left: 0 !important; }
    body { background: white; color: black; }
    .panel, .stat-card { border: 1px solid #ddd; }
}