/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #ffffff;
    min-height: 100vh;
    padding: 20px;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* Typography */
h1 {
    font-size: 2.5rem;
    color: #2196F3;
    margin-bottom: 1.5rem;
    font-weight: 700;
    text-align: center;
}

h2 {
    font-size: 1.8rem;
    color: #2196F3;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

h3 {
    font-size: 1.4rem;
    color: #555;
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    font-size: 1.05rem;
    color: #555;
}

/* Links */
a {
    color: #2196F3;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

a:hover {
    color: #4CAF50;
    text-decoration: underline;
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid #f0f0f0;
}

.nav-links a {
    padding: 12px 24px;
    background: #2196F3;
    color: white;
    border-radius: 6px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.nav-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
    text-decoration: none;
}

/* Back Link */
.back-link {
    display: inline-block;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: #f5f5f5;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: #e0e0e0;
    text-decoration: none;
}

/* Lists */
ul {
    margin: 1rem 0 1rem 2rem;
    color: #555;
}

li {
    margin-bottom: 0.5rem;
}

/* Content Sections */
.content-section {
    margin-bottom: 2rem;
}

/* Notice Box (for the main page message) */
.notice-box {
    background: #f8f9fa;
    border-left: 4px solid #2196F3;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.notice-box p {
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
    color: #777;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-links a {
        width: 100%;
        text-align: center;
    }
}