body {
    font-family: 'Montserrat', sans-serif;
    margin: 0;
    background-color: #f4f7f6;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0;
    font-size: 2.8rem;
    font-weight: 600;
}

header .tagline {
    margin-top: 0.5rem;
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background-color: #fff;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease-in-out;
}

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

.card h2 {
    color: #34495e;
    margin-top: 0;
    font-size: 1.8rem;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.7rem;
    margin-bottom: 1rem;
}

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

.card li {
    padding: 0.6rem 0;
    border-bottom: 1px dashed #eee;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card li:last-child {
    border-bottom: none;
}

.card p {
    line-height: 1.6;
}

.btn {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 1rem;
    transition: background-color 0.2s ease;
}

.btn:hover {
    background-color: #2980b9;
}

.countdown-container {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed #eee;
}

.countdown {
    font-size: 2.5rem;
    font-weight: 600;
    color: #e74c3c;
    margin-top: 0.5rem;
}

footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    text-align: center;
    padding: 1.5rem 1rem;
    margin-top: 2rem;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

/* Responsive Design */
@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    header .tagline {
        font-size: 1rem;
    }

    .card h2 {
        font-size: 1.5rem;
    }

    .countdown {
        font-size: 2rem;
    }
}