body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f1f5f9;
    color: #334155;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 600px;
}

.card {
    background: #ffffff;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid #e2e8f0;
}

.ad-link-btn {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    text-align: center;
    padding: 14px 20px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    transition: all 0.2s ease-in-out;
    box-sizing: border-box;
}

.ad-link-btn:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-1px);
}

h1 {
    font-size: 22px;
    color: #1e293b;
    margin-top: 0;
}

h2 {
    font-size: 18px;
    color: #1e293b;
    margin-top: 0;
}