:root {
    --bg-main: #0f111a;
    --bg-sidebar: #151822;
    --bg-card: #1c202d;
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --border: #2e364f;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
}

.layout {
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 24px;
    transition: transform 0.3s ease-in-out;
    flex-shrink: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: #fff;
    letter-spacing: 1px;
}

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

.nav-item {
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: 8px;
    transition: 0.2s;
    font-weight: 500;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 70px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    background: var(--bg-main);
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.search-bar input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 10px 16px;
    border-radius: 8px;
    color: #fff;
    outline: none;
    width: 300px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 36px;
    height: 36px;
    background: var(--accent);
    border-radius: 50%;
}

.dashboard-body {
    padding: 32px;
    overflow-y: auto;
}

.welcome {
    margin-bottom: 32px;
}

.welcome h1 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

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

.kpis {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.kpi-card,
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.kpi-card h3 {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 12px;
}

.kpi-card .value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.trend {
    font-size: 0.85rem;
    font-weight: 500;
}

.trend.positive {
    color: var(--success);
}

.trend.negative {
    color: var(--danger);
}

.charts-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.chart-card.full-width {
    grid-column: 1 / -1;
}

.chart-card h3 {
    font-size: 1.1rem;
    margin-bottom: 24px;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    padding-bottom: 16px;
}

.section-content {
    display: none;
}

.section-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

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

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

.chart-wrapper {
    position: relative;
    height: 300px;
    width: 100%;
}

.table-section {
    margin-bottom: 32px;
}

.table-responsive {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th,
td {
    padding: 16px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

th {
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.badge.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fcd34d;
}

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

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

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

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

.settings-form input,
.settings-form select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: 0.2s;
}

.settings-form input:focus,
.settings-form select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.settings-form input:disabled {
    background: rgba(0, 0, 0, 0.2);
    cursor: not-allowed;
}

.btn-save {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s;
}

.btn-save:hover {
    filter: brightness(1.15);
}

.switch-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #374151;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--accent);
}

input:focus+.slider {
    box-shadow: 0 0 1px var(--accent);
}

input:checked+.slider:before {
    transform: translateX(22px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}


@media (max-width: 1024px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        height: 100%;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 15px rgba(0, 0, 0, 0.5);
    }

    .menu-btn {
        display: block;
    }

    .topbar {
        padding: 0 16px;
    }

    .search-bar input {
        width: 200px;
    }

    .dashboard-body {
        padding: 16px;
    }

    .chart-wrapper {
        height: 250px;
    }
}