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

body {
    font-family: 'Roboto', sans-serif;
    background: #1a1a2e;
    color: #e0e0e0;
    display: flex;
}

.sidebar {
    width: 250px;
    background: #16213e;
    height: 100vh;
    padding: 20px;
    position: fixed;
    top: 0;
    left: 0;
    box-shadow: 2px 0 5px rgba(0,0,0,0.5);
}

.sidebar h2 {
    color: #00d4ff;
    text-align: center;
    margin-bottom: 20px;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 15px;
    cursor: pointer;
    color: #e0e0e0;
    transition: background 0.3s;
}

.sidebar li:hover {
    background: #0f3460;
}

.main-content {
    margin-left: 270px;
    padding: 20px;
    width: calc(100% - 270px);
}

.section {
    display: none;
}

.section.active {
    display: block;
}

h1, h2 {
    color: #00d4ff;
    margin-bottom: 20px;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: #0f3460;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    color: #e0e0e0;
    font-size: 18px;
    margin-bottom: 10px;
}

.card p, .card input {
    font-size: 24px;
    color: #00d4ff;
}

.card input {
    background: #16213e;
    border: none;
    color: #e0e0e0;
    padding: 5px;
    width: 80%;
    text-align: center;
}

.input-section {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
    background: #16213e;
    padding: 20px;
    border-radius: 10px;
}

input, button {
    padding: 12px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background: #e0e0e0;
    color: #1a1a2e;
}

button {
    background: #00d4ff;
    color: #1a1a2e;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #00a3cc;
}

.chart-container {
    background: #0f3460;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #0f3460;
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #16213e;
}

th {
    background: #00d4ff;
    color: #1a1a2e;
}

td img {
    max-width: 100px;
    border-radius: 5px;
}