body {
    margin: 0;
    font-family: Arial;
    background: #0f172a;
    color: white;
}

/* Layout */
.layout {
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 220px;
    background: #020617;
    height: 100vh;
    padding: 20px;
}

.sidebar h2 {
    margin-bottom: 20px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar li {
    margin: 15px 0;
    cursor: pointer;
}

/* Main */
.main {
    flex: 1;
    padding: 20px;
}

/* Topbar */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Cards */
.cards {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.card {
    flex: 1;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    font-size: 20px;
}

/* Colors */
.green { background: linear-gradient(135deg, #22c55e, #16a34a); }
.red { background: linear-gradient(135deg, #ef4444, #b91c1c); }
.blue { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.yellow { background: linear-gradient(135deg, #facc15, #ca8a04); }

/* Chart */
.chart-box {
    background: #1e293b;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 20px;
}

/* Log */
.log-box {
    background: #1e293b;
    padding: 20px;
    border-radius: 15px;
}

.log-box ul {
    list-style: none;
    padding: 0;
}

.log-box li {
    padding: 8px;
    border-bottom: 1px solid #334155;
}

/* About */
.about {
    margin-top: 20px;
}

a {
    color: #38bdf8;
}

/* Mobile */
@media(max-width: 768px) {
    .layout {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
    }
}