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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
}

h1 {
    color: #667eea;
    font-size: 2.2em;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    color: #666;
    font-size: 1.1em;
    margin-bottom: 20px;
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
    text-align: center;
}

nav a {
    color: #667eea;
    text-decoration: none;
    margin: 0 15px;
    font-weight: 600;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #764ba2;
}

/* Article Content */
.article-content {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 40px 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

h2 {
    color: #667eea;
    font-size: 1.8em;
    margin-bottom: 20px;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

h3 {
    color: #764ba2;
    font-size: 1.4em;
    margin-top: 25px;
    margin-bottom: 15px;
}

p {
    margin-bottom: 15px;
    font-size: 1.05em;
    color: #555;
    text-align: justify;
}

ul, ol {
    margin: 20px 0 20px 30px;
    color: #555;
}

li {
    margin-bottom: 8px;
    font-size: 1.05em;
}

/* Ad Container */
.ad-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 30px auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1em;
    font-weight: 600;
    margin: 20px 10px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

/* Tips Box */
.tips-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 12px;
    margin: 25px 0;
}

.tips-box h3 {
    color: white;
    margin-top: 0;
}

.tips-box p {
    color: rgba(255, 255, 255, 0.9);
}

/* Footer */
footer {
    text-align: center;
    color: white;
    padding: 30px;
    margin-top: 40px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
}

footer p {
    color: white;
    margin: 5px 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8em;
    }

    h2 {
        font-size: 1.5em;
    }

    .container {
        padding: 15px;
    }

    header, .article-content {
        padding: 25px 20px;
    }

    nav {
        padding: 10px;
    }

    nav a {
        margin: 0 8px;
        font-size: 0.9em;
    }

    .ad-container {
        overflow-x: auto;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 1.5em;
    }

    header, .article-content {
        padding: 20px 15px;
    }

    nav a {
        display: block;
        margin: 5px 0;
    }
}