/* Professional Page Design System */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: #2d3748;
}

/* Modern Hero Section */
.article-hero {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    padding: 4rem 2rem 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.article-hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.article-title {
    color: #ffffff !important;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
}

.article-subtitle {
    color: #f7fafc !important;
    font-size: 1.25rem;
    font-weight: 300;
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

/* Compact Container Design */
.container {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    margin: -2rem auto 4rem;
    max-width: 900px;
    position: relative;
    z-index: 3;
    overflow: hidden;
}

/* Content Styling */
article.container > section {
    padding: 2rem 3rem;
    border-bottom: 1px solid #e2e8f0;
}

article.container > section:last-child {
    border-bottom: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: #1a202c;
    font-weight: 600;
}

h2 {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, #06b6d4);
    border-radius: 2px;
}

h3 {
    font-size: 1.5rem;
    color: #374151;
    margin: 2rem 0 1rem;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: #4a5568;
}

/* Lists */
ul, ol {
    margin: 1.5rem 0;
    padding-left: 0;
}

ul li, ol li {
    margin-bottom: 0.8rem;
    padding-left: 2rem;
    position: relative;
    font-size: 1.05rem;
    color: #4a5568;
}

ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
    font-size: 1.2rem;
}

/* Links */
a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
}

a:hover {
    color: #1d4ed8;
    border-bottom-color: #1d4ed8;
    transform: translateY(-1px);
}

/* Feature Boxes */
.feature-box {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid #2563eb;
    position: relative;
    overflow: hidden;
}

.feature-box::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
}

.feature-box h3 {
    color: #1e40af;
    margin-top: 0;
}

/* Warning/Alert Boxes */
.warning-box {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid #f59e0b;
}

.warning-box h3 {
    color: #92400e;
    margin-top: 0;
}

/* Success Boxes */
.success-box {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid #10b981;
}

.success-box h3 {
    color: #047857;
    margin-top: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .article-hero {
        padding: 3rem 1rem 2rem;
    }

    .article-title {
        font-size: 2.25rem;
    }

    .article-subtitle {
        font-size: 1.1rem;
    }

    article.container > section {
        padding: 1.5rem 2rem;
    }

    .container {
        margin: -1rem 1rem 2rem;
        border-radius: 12px;
    }
}

@media (max-width: 480px) {
    .article-title {
        font-size: 1.875rem;
    }

    article.container > section {
        padding: 1.5rem 1.5rem;
    }
}