/* 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-color: #f5f5f5;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: #ffffff;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    min-height: 100vh;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 40px 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 15px;
    font-weight: 700;
}

.app-name {
    font-size: 1.3em;
    margin-bottom: 10px;
    opacity: 0.95;
}

.last-updated {
    font-size: 0.95em;
    opacity: 0.85;
    font-style: italic;
}

/* Main Content */
main {
    padding: 40px;
}

/* Sections */
section {
    margin-bottom: 40px;
}

section:last-child {
    margin-bottom: 0;
}

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

h3 {
    color: #764ba2;
    font-size: 1.4em;
    margin: 25px 0 15px;
}

h4 {
    color: #555;
    font-size: 1.2em;
    margin: 20px 0 10px;
}

/* Paragraphs */
p {
    margin-bottom: 15px;
    text-align: justify;
    color: #444;
}

/* Lists */
ul {
    margin: 15px 0 15px 25px;
    list-style-type: disc;
}

li {
    margin-bottom: 10px;
    color: #555;
    padding-left: 5px;
}

/* Links */
a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* Contact Info */
.contact-info {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    margin-top: 20px;
}

.contact-info p {
    margin-bottom: 10px;
    text-align: left;
}

.contact-info strong {
    color: #667eea;
    font-size: 1.1em;
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 25px 40px;
    margin-top: 40px;
}

footer p {
    margin: 0;
    text-align: center;
    color: white;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        padding: 40px 20px 30px;
    }

    header h1 {
        font-size: 2em;
    }

    .app-name {
        font-size: 1.1em;
    }

    main {
        padding: 30px 20px;
    }

    h2 {
        font-size: 1.5em;
    }

    h3 {
        font-size: 1.2em;
    }

    h4 {
        font-size: 1.1em;
    }

    ul {
        margin-left: 15px;
    }

    .contact-info {
        padding: 20px;
    }

    footer {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.6em;
    }

    .app-name {
        font-size: 1em;
    }

    h2 {
        font-size: 1.3em;
    }

    h3 {
        font-size: 1.1em;
    }

    main {
        padding: 20px 15px;
    }
}

/* Print Styles */
@media print {
    body {
        background-color: white;
    }

    .container {
        box-shadow: none;
    }

    header {
        background: white;
        color: #333;
        border-bottom: 3px solid #667eea;
    }

    a {
        color: #333;
        text-decoration: underline;
    }

    footer {
        background-color: white;
        color: #333;
        border-top: 1px solid #ddd;
    }
}