:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --text-color: #f5f5f5;
    --bg-color: #121212;
    --panel-bg: #202020;
    --card-bg: #2a2a2a;
    --panel-border: #3a3a3a;
    --hover-bg: #333333;
    
    --light-primary-color: #2196F3;
    --light-secondary-color: #27ae60;
    --light-accent-color: #e74c3c;
    --light-text-color: #333333;
    --light-bg-color: #f5f5f5;
    --light-panel-bg: #ffffff;
    --light-card-bg: #f0f0f0;
    --light-panel-border: #e0e0e0;
    --light-hover-bg: #e0e0e0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}

body.light-theme {
    --primary-color: var(--light-primary-color);
    --secondary-color: var(--light-secondary-color);
    --accent-color: var(--light-accent-color);
    --text-color: var(--light-text-color);
    --bg-color: var(--light-bg-color);
    --panel-bg: var(--light-panel-bg);
    --card-bg: var(--light-card-bg);
    --panel-border: var(--light-panel-border);
    --hover-bg: var(--light-hover-bg);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    transition: transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    background-color: rgba(52, 152, 219, 0.1);
}

.theme-toggle:hover {
    transform: rotate(30deg);
    background-color: rgba(52, 152, 219, 0.2);
}

.header {
    background-color: var(--panel-bg);
    padding: 15px 0;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 10;
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-right: 15px;
    max-height: 70px;
    width: auto;
    object-fit: contain;
}

.logo {
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-right: 15px;
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
}

.sections-menu {
    margin-bottom: 1px;
    background-color: var(--panel-bg);
    padding: 0;
    border-bottom: 1px solid var(--panel-border);
}

.sections-menu ul {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.sections-menu li {
    margin: 0;
}

.sections-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 15px 20px;
    display: inline-block;
    transition: background-color 0.3s;
    letter-spacing: 1px;
}

.sections-menu a:hover {
    background-color: var(--hover-bg);
}

@media (max-width: 768px) {
    .sections-menu {
        overflow-x: auto;
        white-space: nowrap;
        padding: 0 10px;
    }
    
    .sections-menu ul {
        justify-content: flex-start;
    }
    
    .sections-menu a {
        padding: 12px 15px;
    }
}

@media (max-width: 576px) {
    .mobile-menu-btn {
        display: block;
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }
}

.footer {
    background-color: var(--panel-bg);
    padding: 30px 0 20px;
    margin-top: 0;
    border-top: 1px solid var(--panel-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-column {
    flex: 1;
    min-width: 200px;
}

.footer-title {
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-color);
    opacity: 0.8;
    transition: opacity 0.3s, color 0.3s;
    font-size: 0.9rem;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-contact i {
    width: 20px;
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-contact p {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.footer-copyright {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--panel-border);
    font-size: 0.9rem;
    opacity: 0.7;
}