.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: hsla(220, 15%, 8%, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
    gap: var(--spacing-8);
}

.logo-link {
    display: flex;
    align-items: center;
    transition: transform var(--transition-fast);
}

.logo-link:hover {
    transform: scale(1.05);
}

.logo-image {
    height: 28px;
    width: auto;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: var(--spacing-2);
    background: linear-gradient(135deg, hsla(from var(--color-primary) h s l / 0.1), hsla(from var(--color-primary) h s l / 0.05));
    border: 1px solid hsla(from var(--color-primary) h s l / 0.3);
    border-radius: var(--radius-md);
    cursor: pointer;
    z-index: 51;
    transition: all var(--transition-fast);
}

.nav-toggle:hover {
    background: linear-gradient(135deg, hsla(from var(--color-primary) h s l / 0.2), hsla(from var(--color-primary) h s l / 0.1));
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-menu {
    display: none;
    gap: var(--spacing-8);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    transition: color var(--transition-fast);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark));
    color: var(--color-primary-foreground);
    border: 1px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px hsla(from var(--color-primary) h s l / 0.3);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-foreground);
    border: 1px solid var(--color-border);
}

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

.btn-large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-base);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-icon {
    margin: 0 auto var(--spacing-4);
    color: var(--color-primary);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-muted-foreground);
    max-width: 800px;
    margin: 0 auto;
}

.tag {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    background-color: hsla(from var(--color-primary) h s l / 0.1);
    color: var(--color-primary);
    border: 1px solid hsla(from var(--color-primary) h s l / 0.2);
    border-radius: var(--radius-full);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        display: flex;
    }
    
    .section-title {
        font-size: var(--text-5xl);
    }
}

@media (max-width: 767px) {
    .nav-menu {
        display: flex;
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: linear-gradient(135deg, var(--color-background-card) 0%, var(--color-background) 100%);
        border-left: 2px solid var(--color-primary);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-4);
        padding: var(--spacing-24) var(--spacing-8);
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 50;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        font-size: var(--text-lg);
        font-weight: var(--weight-semibold);
        padding: var(--spacing-3) var(--spacing-4);
        width: 100%;
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
    }
    
    .nav-menu .nav-link:hover {
        background-color: hsla(142, 76%, 50%, 0.1);
        padding-left: var(--spacing-6);
        color: var(--color-primary);
    }
    
    .btn-primary {
        display: none;
    }
    
}