/* Bright Cobalt Blue Color Scheme */
:root {
    --primary-blue: #0047AB;
    --secondary-blue: #0066FF;
    --light-blue: #E6F2FF;
    --dark-blue: #003366;
    --accent-blue: #1E90FF;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --white: #ffffff;
    --border-color: #B0C4DE;
}

* {
    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: var(--text-dark);
    background-color: var(--white);
    font-size: 16px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 71, 171, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

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

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

.language-switcher {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.language-switcher a {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    transition: background 0.3s;
    font-size: 0.9rem;
}

.language-switcher a:hover,
.language-switcher a.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
    padding: 3rem 2rem;
    border-radius: 10px;
    margin-bottom: 3rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* Content Blocks */
.content-block {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 71, 171, 0.1);
}

.content-block h2 {
    color: var(--primary-blue);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-blue);
}

.content-block h3 {
    color: var(--secondary-blue);
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content-block p {
    margin-bottom: 1rem;
    color: var(--text-dark);
    line-height: 1.8;
}

.content-block ul,
.content-block ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

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

/* Images */
.content-image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 2rem 0;
    box-shadow: 0 4px 15px rgba(0, 71, 171, 0.2);
    display: block;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 71, 171, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

table th {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

table tr:last-child td {
    border-bottom: none;
}

table tr:nth-child(even) {
    background: var(--light-blue);
}

/* FAQ Section */
.faq-section {
    margin-top: 3rem;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--white);
}

.faq-question {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1.2rem;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--secondary-blue);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s;
}

.faq-question.active::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: var(--light-blue);
}

.faq-answer.active {
    max-height: 1000px;
    padding: 1.2rem;
}

/* Internal Links */
.internal-link {
    color: var(--secondary-blue);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}

.internal-link:hover {
    border-bottom-color: var(--secondary-blue);
}

/* Footer */
footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

footer a {
    color: var(--light-blue);
    text-decoration: none;
    margin: 0 1rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .content-block h2 {
        font-size: 1.5rem;
    }
    
    .content-block h3 {
        font-size: 1.2rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    table th,
    table td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    main {
        padding: 1rem 10px;
    }
    
    .content-block {
        padding: 1rem;
    }
    
    .hero {
        padding: 2rem 1rem;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.highlight {
    background: var(--light-blue);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: var(--primary-blue);
    font-weight: 600;
}