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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --bg-gray: #f9fafb;
    --white: #ffffff;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

/* Navbar */
.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Language Selector */
.language-selector {
    display: flex;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.25rem;
    background-color: var(--bg-gray);
}

.lang-btn {
    padding: 0.375rem 0.75rem;
    border: none;
    background-color: transparent;
    color: var(--text-light);
    cursor: pointer;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.lang-btn:hover {
    background-color: var(--white);
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

/* Release Notes */
.release-section {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.release-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.release-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.release-date {
    color: var(--text-light);
    font-size: 0.875rem;
}

.release-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.release-content ul {
    list-style-type: disc;
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.release-content li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* Quick Links Section */
.quick-links-section {
    margin-bottom: 3rem;
}

.quick-links-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.quick-link-card {
    display: block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s, box-shadow 0.3s;
}

.quick-link-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.quick-link-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.quick-link-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.quick-link-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.5;
}

/* Policy Grid */
.policy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.policy-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.policy-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.policy-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.policy-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.btn-primary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

/* Policy Section */
.policy-section {
    margin-bottom: 3rem;
}

.policy-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.policy-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.policy-content {
    background-color: var(--bg-gray);
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.policy-content p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.policy-content ul {
    list-style-type: disc;
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.policy-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

/* Footer */
.footer {
    background-color: var(--bg-gray);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Responsive Design */

/* Tablet devices (portrait) */
@media (max-width: 1024px) {
    .nav-container {
        padding: 0 1.5rem;
    }

    .container {
        padding: 2.5rem 1.5rem;
    }

    h1 {
        font-size: 2.25rem;
    }

    .quick-links-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

/* Mobile devices and small tablets */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 0 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.75rem;
    }

    .language-selector {
        width: 100%;
        justify-content: center;
    }

    .lang-btn {
        flex: 1;
        padding: 0.5rem;
        font-size: 0.8rem;
    }

    h1 {
        font-size: 2rem;
        line-height: 1.2;
    }

    .subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .container {
        padding: 2rem 1rem;
    }

    .quick-links-section h2 {
        font-size: 1.25rem;
    }

    .quick-links-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .quick-link-card {
        padding: 1.5rem;
    }

    .quick-link-icon {
        font-size: 2rem;
    }

    .quick-link-card h3 {
        font-size: 1.1rem;
    }

    .quick-link-card p {
        font-size: 0.9rem;
    }

    .release-section {
        padding: 1.5rem;
    }

    .release-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .release-header h2 {
        font-size: 1.25rem;
    }

    .release-content h3 {
        font-size: 1rem;
    }

    .release-content ul {
        margin-left: 1.25rem;
    }

    .release-content li {
        font-size: 0.95rem;
    }

    .policy-grid {
        grid-template-columns: 1fr;
    }

    .policy-section h2 {
        font-size: 1.5rem;
    }

    .policy-section h3 {
        font-size: 1.1rem;
    }

    .policy-content {
        padding: 1rem;
    }

    .policy-content p,
    .policy-content li {
        font-size: 0.95rem;
    }

    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        padding: 0 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .logo {
        font-size: 1.25rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .container {
        padding: 1.5rem 0.75rem;
    }

    .release-section {
        padding: 1.25rem;
        margin-bottom: 1.5rem;
    }

    .quick-link-card {
        padding: 1.25rem;
    }

    .quick-links-grid {
        gap: 0.75rem;
    }

    .policy-card {
        padding: 1.25rem;
    }

    .btn-primary {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
}