* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #eef2f6;
    color: #333;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1a237e, #3949ab);
    color: #fff;
    padding: 18px 10px;
    text-align: center;
}

.header h1 {
    margin: 0;
    font-size: 20px;
}

.header p {
    margin: 5px 0 0;
    font-size: 14px;
}

/* Top Navigation */
.nav {
    background: #ffffff;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 10px 5px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    flex-wrap: wrap;
}

.nav a {
    text-decoration: none;
    color: #1a237e;
    font-size: 12px;
    text-align: center;
    width: 20%;
}

.nav a i {
    display: block;
    font-size: 18px;
    margin-bottom: 4px;
}

/* Container */
.container {
    max-width: 1100px;
    margin: 15px auto;
    padding: 10px;
}

/* Cards */
.card {
    background: #ffffff;
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 15px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

.card h2 {
    margin-top: 0;
    color: #1a237e;
    font-size: 16px;
}

/* Highlight Card */
.highlight {
    background: #fff8e1;
    border-left: 6px solid #ffb300;
}

/* Important text */
.important {
    color: #c62828;
    font-weight: bold;
}

/* Footer */
.footer {
    background: #ffffff;
    text-align: center;
    padding: 12px;
    font-size: 12px;
    color: #555;
    border-top: 1px solid #ddd;
}

/* Mobile Optimization */
@media (max-width: 768px) {
    .nav a {
        width: 20%;
        font-size: 11px;
    }

    .card h2 {
        font-size: 15px;
    }
}