:root {
    --primary: #3498db;
    --secondary: #2c3e50;
    --accent: #e74c3c;
    --light: #f7f7f7;
    --dark: #333;
    --gray: #777;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    padding: 0;
    min-height: 100vh;
}

/* Header Styles */
header {
    background: var(--secondary);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo i {
    margin-right: 10px;
    color: var(--primary);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    transition: var(--transition);
    padding: 5px 10px;
    border-radius: 4px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.language-btn i {
    margin-right: 8px;
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 4px;
    box-shadow: var(--shadow);
    width: 180px;
    display: none;
    z-index: 100;
    margin-top: 5px;
}

.language-dropdown button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 12px 15px;
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    color: var(--dark);
}

.language-dropdown button:hover {
    background: #f0f0f0;
}

.language-selector:hover .language-dropdown {
    display: block;
}

/* Container Styles */
.container {
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.logo-large {
    width: 70px;
    height: 70px;
    margin-right: 20px;
    background-color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.logo-large i {
    font-size: 32px;
    color: white;
}

.title-section h1 {
    color: var(--secondary);
    font-size: 32px;
    margin-bottom: 5px;
}

.title-section p {
    color: var(--gray);
    font-size: 16px;
}

h2 {
    color: var(--secondary);
    margin: 25px 0 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

p {
    margin-bottom: 15px;
    font-size: 16px;
}

.highlight {
    background-color: #f8f9fa;
    padding: 20px;
    border-left: 4px solid var(--primary);
    margin: 20px 0;
    border-radius: 4px;
}

.contact-info {
    background-color: #e8f4fc;
    padding: 20px;
    border-radius: 8px;
    margin-top: 30px;
}

.contact-info a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.contact-info a:hover {
    text-decoration: underline;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: var(--gray);
    font-size: 14px;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary);
    transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 25px;
        margin: 20px auto;
    }
    
    .header {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-large {
        margin: 0 auto 15px;
    }
    
    h1 {
        font-size: 28px;
    }
    
    .header-container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .language-selector {
        margin-top: 15px;
    }
}