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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 28px;
    color: #667eea;
    margin-bottom: 5px;
}

header p {
    color: #666;
    font-size: 14px;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 20px 15px;
    flex-wrap: wrap;
}

.tab {
    padding: 10px 20px;
    border: none;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.tab:hover {
    background: white;
    transform: translateY(-2px);
}

.tab.active {
    background: #667eea;
    color: white;
}

.ads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.ad-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.ad-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.ad-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.ad-content {
    padding: 15px;
}

.ad-type {
    display: inline-block;
    padding: 4px 12px;
    background: #667eea;
    color: white;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.ad-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #333;
}

.ad-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 15px;
}

.ad-button {
    display: block;
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.ad-button:hover {
    background: #5568d3;
}

.loading {
    text-align: center;
    padding: 40px;
    color: white;
    font-size: 18px;
}

footer {
    text-align: center;
    padding: 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

@media (max-width: 768px) {
    .ads-grid {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 24px;
    }
}