.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 2rem;
    transition: all 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary);
    outline: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

.controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-control {
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--text);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-control:hover,
.btn-control:focus {
    background: var(--primary);
    color: var(--background);
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

#language-select {
    padding: 0.5rem;
    border-radius: 5px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--primary);
}

.section {
    min-height: 100vh;
    padding: 8rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero {
    position: relative;
    overflow: hidden;
}

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text);
    opacity: 0.9;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--primary);
    text-align: center;
}

.canvas-container, .game-container, .algorithm-container, .audio-container {
    background: var(--surface);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.canvas-container {
    width: 100%;
    max-width: 800px;
}

canvas {
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.2);
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.game-ui {
    text-align: center;
}

.btn-primary, .btn-secondary {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0.25rem;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: white;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--primary);
}

.btn-primary:hover, .btn-primary:focus,
.btn-secondary:hover, .btn-secondary:focus {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.algorithm-controls, .audio-controls {
    margin-top: 1rem;
    text-align: center;
}

.about-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.description {
    color: var(--text);
    opacity: 0.8;
    margin-top: 1rem;
}

.footer {
    text-align: center;
    padding: 2rem;
    background: var(--surface);
    margin-top: 4rem;
}

@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section {
        padding: 6rem 1rem 2rem;
    }
    
    .canvas-container, .game-container, .algorithm-container, .audio-container {
        padding: 1rem;
    }
}