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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background: #667eea;
    color: #fff;
    padding: 40px 40px 30px;
    border-bottom: 4px solid #5568d3;
}

header h1 {
    font-size: 2em;
    margin-bottom: 15px;
    font-weight: 600;
}

.dates {
    font-size: 0.95em;
    opacity: 0.95;
    line-height: 1.8;
}

.dates strong {
    color: #fff;
    font-weight: 600;
}

main {
    padding: 40px;
}

section {
    margin-bottom: 35px;
}

h2 {
    color: #667eea;
    font-size: 1.75em;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid #e0e0e0;
    font-weight: 600;
}

h3 {
    color: #764ba2;
    font-size: 1.3em;
    margin-top: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

p {
    margin-bottom: 12px;
    text-align: justify;
}

ul {
    margin-left: 25px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
    line-height: 1.6;
}

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

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

strong {
    color: #555;
    font-weight: 600;
}

.note {
    background-color: #f9f9f9;
    border-left: 4px solid #667eea;
    padding: 20px;
    margin: 30px 0;
    border-radius: 4px;
}

.summary {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 25px;
    border-radius: 8px;
    border: 2px solid #667eea;
    margin-top: 40px;
}

.summary h2 {
    color: #333;
    border-bottom: 2px solid #667eea;
    margin-bottom: 20px;
}

.summary ul {
    margin-left: 20px;
}

.summary li {
    margin-bottom: 10px;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

footer p {
    margin: 0;
    text-align: center;
}

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

    header h1 {
        font-size: 1.5em;
    }

    main {
        padding: 25px 20px;
    }

    h2 {
        font-size: 1.4em;
    }

    h3 {
        font-size: 1.15em;
    }

    .container {
        box-shadow: none;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.3em;
    }

    .dates {
        font-size: 0.85em;
    }

    main {
        padding: 20px 15px;
    }

    h2 {
        font-size: 1.25em;
    }

    h3 {
        font-size: 1.05em;
    }

    ul {
        margin-left: 20px;
    }
}