:root {
    --primary-blue: #1793d1;
    --dark-blue: #0a5fa0;
    --light-grey: #f5f5f5;
    --text-grey: #333;
    --border-grey: #ddd;
    --accent-blue: #3399ff;
    --code-bg: #f0f0f0;
}

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

html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu',
        'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-grey);
    background-color: #fff;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


.header {
    background-color: var(--text-grey);
    color: white;
    padding: 0;
    border-bottom: 3px solid var(--primary-blue);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background-color: var(--text-grey);
}

.header-brand {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 60px;
    width: auto;
    display: block;
}

.logo {
    font-size: 2.2em;
    font-weight: bold;
    margin: 0;
    letter-spacing: 1px;
}

.tagline {
    font-size: 0.9em;
    opacity: 0.9;
    margin: 5px 0 0 0;
    font-weight: 300;
}

.language-selector {
    display: flex;
    gap: 10px;
    align-items: center;
}

.lang-btn {
    background: none;
    border: 2px solid transparent;
    color: white;
    font-size: 1.5em;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.lang-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.lang-btn.active {
    border-color: var(--primary-blue);
    background-color: rgba(23, 147, 209, 0.2);
}

.navbar {
    background-color: var(--text-grey);
    padding: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

.navbar li {
    flex: 0 1 auto;
}

.navbar a {
    display: block;
    padding: 12px 18px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s ease;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar i {
    font-size: 1.1em;
}

.navbar a:hover {
    background-color: var(--primary-blue);
    border-bottom-color: var(--accent-blue);
}


.container {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px;
    flex: 1;
}


.content {
    background-color: white;
}

.section {
    margin-bottom: 35px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-grey);
}

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

.section h2 {
    color: var(--primary-blue);
    font-size: 1.8em;
    margin: 0 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-blue);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.section h3 {
    color: var(--dark-blue);
    font-size: 1.3em;
    margin: 20px 0 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section h4 {
    color: var(--dark-blue);
    font-size: 1.1em;
    margin: 15px 0 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.section ul,
.section ol {
    margin: 15px 0 15px 30px;
}

.section li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.feature-card {
    background-color: var(--light-grey);
    padding: 15px;
    margin: 15px 0;
    border-left: 4px solid var(--primary-blue);
    border-radius: 2px;
}

.feature-card h3 {
    margin-top: 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.value-card {
    background-color: var(--light-grey);
    padding: 15px;
    border: 1px solid var(--border-grey);
    border-radius: 4px;
    text-align: center;
}

.value-card h4 {
    color: var(--primary-blue);
    margin-top: 0;
    justify-content: center;
}

.value-card p {
    font-size: 0.95em;
    margin-bottom: 0;
}

.info-box {
    background-color: #f0f8ff;
    border-left: 4px solid var(--primary-blue);
    padding: 15px;
    margin: 15px 0;
    border-radius: 2px;
}

.info-box h3,
.info-box h4 {
    margin-top: 0;
    color: var(--primary-blue);
}

.community-card {
    background-color: var(--light-grey);
    padding: 15px;
    margin: 15px 0;
    border: 1px solid var(--border-grey);
    border-radius: 4px;
}

.community-card h4 {
    margin-top: 0;
    color: var(--primary-blue);
}

.doc-card {
    background-color: var(--light-grey);
    padding: 15px;
    margin: 15px 0;
    border: 1px solid var(--border-grey);
    border-left: 4px solid var(--primary-blue);
    border-radius: 2px;
}

.doc-card h4 {
    margin-top: 0;
    color: var(--primary-blue);
}

.faq-item {
    background-color: white;
    border: 1px solid var(--border-grey);
    padding: 12px;
    margin: 10px 0;
    border-radius: 2px;
}

.faq-item h4 {
    margin: 0 0 8px 0;
    color: var(--primary-blue);
}

.faq-item p {
    margin-bottom: 0;
}

.download-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.download-box {
    border: 2px solid var(--primary-blue);
    padding: 20px;
    background-color: var(--light-grey);
    border-radius: 4px;
    text-align: center;
}

.download-box h3 {
    color: var(--primary-blue);
    margin-top: 0;
}

.release-date {
    font-size: 0.9em;
    color: #666;
    margin: 8px 0;
}

.checksum {
    color: #999;
    margin-top: 10px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin: 10px 0;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 500;
}

.btn-download {
    background-color: var(--primary-blue);
    color: white;
    border: 2px solid var(--primary-blue);
}

.btn-download:hover {
    background-color: var(--dark-blue);
    border-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(23, 147, 209, 0.3);
}

.doc-links {
    list-style: none;
    margin: 15px 0;
}

.doc-links li {
    margin-bottom: 8px;
}

.doc-links a {
    color: var(--primary-blue);
    text-decoration: none;
}

.doc-links a:hover {
    text-decoration: underline;
}


.sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-box {
    background-color: var(--light-grey);
    border: 1px solid var(--border-grey);
    border-left: 4px solid var(--primary-blue);
    padding: 15px;
    border-radius: 2px;
}

.sidebar-box h3 {
    color: var(--primary-blue);
    font-size: 1.1em;
    margin: 0 0 12px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-grey);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-box h3 i {
    font-size: 1em;
}

.sidebar-box ul {
    list-style: none;
    margin: 0;
}

.sidebar-box li {
    margin-bottom: 8px;
    padding-bottom: 6px;
}

.sidebar-box li:last-child {
    margin-bottom: 0;
}

.sidebar-box li i {
    margin-right: 6px;
    width: 1.2em;
    text-align: center;
    color: var(--primary-blue);
}

.sidebar-box a {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.95em;
    display: flex;
    align-items: center;
    gap: 0;
}

.sidebar-box a:hover {
    text-decoration: underline;
}

.date {
    display: block;
    font-size: 0.8em;
    color: #999;
    margin-top: 2px;
}

.sidebar-box dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px 12px;
    font-size: 0.9em;
}

.sidebar-box dt {
    font-weight: bold;
    color: var(--dark-blue);
}

.sidebar-box dd {
    margin: 0;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background-color: white;
    border: 1px solid var(--border-grey);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 2px;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.social-links a i {
    font-size: 1.1em;
}

.social-links a:hover {
    background-color: var(--primary-blue);
    color: white;
}


.footer {
    background-color: var(--text-grey);
    color: white;
    text-align: center;
    padding: 30px;
    margin-top: 40px;
    border-top: 3px solid var(--primary-blue);
}

.footer-content p {
    margin: 8px 0;
    font-size: 0.9em;
}

.footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}


@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        padding: 20px;
        gap: 20px;
    }
    
    .navbar ul {
        flex-direction: column;
    }
    
    .navbar li {
        flex: 1 1 100%;
    }
    
    .navbar a {
        padding: 10px 15px;
        border-bottom: none;
        border-left: 3px solid transparent;
    }
    
    .navbar a:hover {
        border-left-color: var(--accent-blue);
    }
    
    .header-top {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .header-brand {
        flex-direction: column;
        justify-content: center;
    }
    
    .language-selector {
        justify-content: center;
    }
    
    .download-boxes {
        grid-template-columns: 1fr;
    }

    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .section h2 {
        font-size: 1.5em;
    }
    
    .logo {
        font-size: 1.8em;
    }

    .logo-img {
        height: 50px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .navbar a {
        padding: 8px 10px;
        font-size: 0.9em;
    }
    
    .section {
        margin-bottom: 25px;
    }
    
    .section h2 {
        font-size: 1.3em;
    }
    
    .logo {
        font-size: 1.5em;
    }

    .logo-img {
        height: 40px;
    }
    
    .tagline {
        font-size: 0.8em;
    }

    .feature-card,
    .value-card,
    .community-card,
    .doc-card {
        padding: 12px;
    }

    .section h3 {
        font-size: 1.2em;
    }
}

@media print {
    .header,
    .sidebar,
    .footer {
        display: none;
    }
    
    .container {
        grid-template-columns: 1fr;
        max-width: 100%;
    }
}